Virtual Machines for Message Based Real-Time and Interactive Simulation

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计算机英语(第2版)新增答案

《计算机英语（第2版）》参考答案注：这里仅给出《计算机英语（第2版）》新增或变化课文的答案，其他未改动课文答案参见《计算机英语（第1版）》原来的答案。

Unit OneSection CPDA Prizefight: Palm vs. Pocket PCI. Fill in the blanks with the information given in the text:1. With DataViz’s Documents To Go, you can view and edit desktop documents on your PDA without converting them first to a PDA-specific ________. (format)2. Both Palm OS and Windows Mobile PDAs can offer e-mail via ________ so that new messages received on your desktop system are transferred to the PDA for on-the-go reading. (synchronization)3. The Windows Mobile keyboard, Block Recognizer, and Letter Recognizer are all ________ input areas, meaning they appear and disappear as needed. (virtual)4. Generally speaking, Windows Mobile performs better in entering information and playing ________ files while Palm OS offers easier operation, more ________ programs, better desktop compatibility, and a stronger e-mail application. (multimedia; third-party)II. Translate the following terms or phrases from English into Chinese and vice versa:1. data field数据字段2. learning curve学习曲线3. third-party solution第三方解决方案4. Windows Media Player Windows媒体播放器5. 开始按钮Start button6. 指定输入区designated input area7. 手写体识别系统handwriting-recognition system8. 字符集character setUnit ThreeSection BLonghorn：The Next Version of WindowsI. Fill in the blanks with the information given in the text:1. NGSCB, the new security architecture Microsoft is developing for Longhorn, splits the OS into two parts: a standard mode and a(n) ________ mode. (secure)2. It is reported that Longhorn will provide different levels of operation that disable the more intensive Aero effects to boost ________ on less capable PCs. (performance)3. With Longhorn’s new graphics and presentation engine, we can create and display Tiles on the desktop, which remind us of the old Active Desktop but are based on ________ instead of ________. (XML; HTML)4. The most talked-about feature in Longhorn so far is its new storage system, WinFS, whichworks like a(n) ________ database. (relational)II. Translate the following terms or phrases from English into Chinese and vice versa:1. search box搜索框2. built-in firewall内置防火墙3. standalone application独立应用程序4. active desktop 活动桌面5. mobile device移动设备6. 专有软件proprietary software7. 快速加载键quick-launch key8. 图形加速器graphics accelerator9. 虚拟文件夹virtual folder10. 三维界面three-dimensional interfaceUnit FourSection CArraysI. Fill in the blanks with the information given in the text:1. Given the array called object with 20 elements, if you see the term object10, you know the array is in ________ form; if you see the term object[10], you know the array is in ________ form. (subscript; index)2. In most programming languages, an array is a static data structure. When you define an array, the size is ________. (fixed)3. A(n) ________ is a pictorial representation of a frequency array. (histogram)4. An array that consists of just rows and columns is probably a(n) ________ array. (two-dimensional)II. Translate the following terms or phrases from English into Chinese and vice versa:1. bar chart条形图2. frequency array频率数组3. graphical representation图形表示4. multidimensional array多维数组5. 用户视图user(’s) view6. 下标形式subscript form7. 一维数组one-dimensional array8. 编程结构programming constructUnit FiveSection BMicrosoft .NET vs. J2EEI. Fill in the blanks with the information given in the text:1. One of the differences between C# and Java is that Java runs on any platform with a Java Virtual ________ while C# only runs in Windows for the foreseeable future. (Machine)2. With .NET, Microsoft is opening up a channel both to ________ in other programming languages and to ________. (developers; components)3. J2EE is a single-language platform; calls from/to objects in other languages are possiblethrough ________, but this kind of support is not a ubiquitous part of the platform. (CORBA)4. One important element of the .NET platform is a common language ________, which runs bytecodes in an Internal Language format. (runtime)II. Translate the following terms or phrases from English into Chinese and vice versa:1. messaging model消息收发模型2. common language runtime通用语言运行时刻（环境）3. hierarchical namespace分等级层次的名称空间4. development community开发社区5. CORBA公用对象请求代理（程序）体系结构6. 基本组件base component7. 元数据标记metadata tag8. 虚拟机virtual machine9. 集成开发环境IDE（integrated development environment）10. 简单对象访问协议SOAP（Simple Object Access Protocol）Unit SixSection ASoftware Life CycleI. Fill in the blanks with the information given in the text:1. The development process in the software life cycle involves four phases: analysis, design, implementation, and ________. (testing)2. In the system development process, the system analyst defines the user, needs, requirements and methods in the ________ phase. (analysis)3. In the system development process, the code is written in the ________ phase. (implementation)4. In the system development process, modularity is a very well-established principle used in the ________ phase. (design)5. The most commonly used tool in the design phase is the ________. (structure chart)6. In the system development process, ________ and pseudocode are tools used by programmers in the implementation phase. (flowcharts)7. Pseudocode is part English and part program ________. (logic)8. While black box testing is done by the system test engineer and the ________, white box testing is done by the ________. (user; programmer)II. Translate the following terms or phrases from English into Chinese and vice versa:1. standard graphical symbol标准图形符号2. logical flow of data标准图形符号3. test case测试用例4. program validation程序验证5. white box testing白盒测试6. student registration system学生注册系统7. customized banking package定制的金融软件包8. software life cycle软件生命周期9. user working environment用户工作环境10. implementation phase实现阶段11. 测试数据test data12. 结构图structure chart13. 系统开发阶段system development phase14. 软件工程software engineering15. 系统分析员system(s) analyst16. 测试工程师test engineer17. 系统生命周期system life cycle18. 设计阶段design phase19. 黑盒测试black box testing20. 会计软件包accounting packageIII. Fill in each of the blanks with one of the words given in the following list, making changes if necessary:development; testing; programmer; chart; engineer; attend; interfacessystem; software; small; userdevelop; changes; quality; board; UncontrolledIV. Translate the following passage from English into Chinese:软件工程是软件开发的一个领域；在这个领域中，计算机科学家和工程师研究有关的方法与工具，以使高效开发正确、可靠和健壮的计算机程序变得容易。

FortiMail

1FortiMail™ for Email SecurityPowerful Appliances and Virtual Machines for Scalable Email Security ProtectionWith best-in-class performance validated by independent testing firms, FortiMail delivers advanced multi-layeredprotection against the full spectrum of email-borne threats. Powered by FortiGuard Labs threat intelligence and integrated into the Fortinet Security Fabric, FortiMail helps yourorganization prevent, detect, and respond to email-based threats including spam, phishing, malware, zero-day threats, impersonation, and Business Email Compromise (BEC) attacks.DATA SHEETProtection Against Email-borne ThreatsPowerful anti-spam and anti-malware are complemented by advanced techniques like outbreak protection, content disarm and reconstruction, sandbox analysis, impersonation detection, and other technologies to stop unwanted bulk email, phishing, ransomware, business email compromise, and targeted attacks.Validated PerformanceFortinet is one of the only email security vendors to consistently prove the efficacy of FortiMail through independent testing. For instance, FortiMail earned a AAA rating from SE Labs and a 99.78% Spam Capture Rate from Virus Bulletin.Fabric-enabled Email SecurityIntegrations with Fortinet products as well as third-partycomponents help you adopt a proactive approach to security by sharing IoCs across a seamless Security Fabric. It also enables advanced and complementary email security protection for Microsoft 365 environments through API-level integration.Powered by FortiGuard LabsFortinet FortiMail is powered by threat intelligence from FortiGuard Labs. With visibility across 500,000 customer environments worldwide, FortiGuard Labs is one of the preeminent threat research teams in existence.Check the box against :9Spam 9Phishing9Spear-phishing and whalephishing9Malicious Attachments and URLs 9Ransomware 9Zero-day Threats 9Impersonation9Business Email Compromise(BEC)Email security solutions for organizations that prefer full control and management over their email security infrastructure.DATA SHEET | FortiMail™2FEATURESProactive Email SecurityFortiMail addresses the full spectrum of risks that email poses to organizations, fortified by FortiGuard Labs’ global visibility and intelligence on the latest threats.Multi-Layered Anti-SpamMultiple sender, protocol and content inspection techniques shield users from spam and junk mail. Using a combination of reputation analysis, connection filtering, authentication and recipient verification methods allows for fast and accurate email protection. Checks include IP, domain, sender, SPF, DKIM, DMARC and geographical restrictions.Finally, message structure and content are analyzed based on the digital signature, keywords in context, image analysis, embedded URIs, and more advanced techniques such as behavior analysis and spam outbreak protection. Working together, these techniques consistently identify and block a verified 99.7% of spam in real-world conditions.Powerful Anti-MalwareCombining multiple static with dynamic technologies that include signature, heuristic, and behavioral techniques along with virus outbreak prevention, FortiMail protects against awide range of constantly evolving threats.Advanced Threat ProtectionFor an even stronger defense against the very latest threat classes like business email compromise and targeted attacks, FortiMail offers optional content disarm and reconstruction, sandbox analysis, sophisticated spoof detection, and more.Integrated Data Loss PreventionA robust set of capabilities for data loss prevention and email encryption safely deliver sensitive emails and protect against the inadvertent loss of data. These features facilitate compliance with corporate policies and industry regulations.Intuitive ControlsReal-time dashboards, rich reporting, centralized quarantine and simple to use end-user controls allow organizations to get running and realize value quickly. An intuitive user interface combined with flexible MTA and mail-handling capabilities give full visibility and easy control over email traffic.DATA SHEET | FortiMail™FEATURESIntegration with the Fortinet Security FabricThe future of email security is platform- or fabric-enabled tocounter the growing sophistication of threats and multi-vectorcampaigns. As part of the Fortinet Security Fabric, Indicatorsof Compromise and other telemetry can be shared forenhanced security across your entire security infrastructure.IT and security teams are able to more completely connectthe dots to identify multi-vector campaigns by sophisticatedactors. In addition, intensive and repetitive workflowsincluding response can be automated to reduce the burdenon security operations teams.Industry Recognized, Top-Rated PerformanceFortiMail delivers superior performance as measured by independent third-party testers.99.9% Detection of malicious emails across malware types and across malwarefamilies94%Overall Detection Rate99.78%Spam Catch Rate100%+Wildlist Detection Rate344We want full control.Manage it for us.Virtual Machines and appliances for teams who want total control over their infrastructure and email security.Email security as a service for teams who just want to focus on monitoring and responding to email threats. Fortinet handles the infrastructure.Read the FortiMail Cloud data sheet >DATA SHEET | FortiMail™FEATURESHigh Performance, Flexible DeploymentScale easily to handle millions of messages per hour. Serving organizations of all sizes, Fortinet provides a wide range of deployment models and operation modes to best match your organization’s email security needs.Appliances and Virtual MachinesFortiMail Appliances and virtual machines are for organizations that prefer full control and management over their email security infrastructure for on-premise and cloud use cases.§Appliances for on-premise environments§Virtual machines for running on popular hypervisor platforms including:§VMWare§Citrix XenServer§Hyper-V§KVM§AWS§AzureFortiMail CloudFortiMail Cloud for organizations that want simple, easy-to-use email security as-a-service for both on-premise and cloud-based email services.Operation ModesDeployment ModelsGateway ModeProvides inbound and outbound proxy mail transfer agent(MTA) services for existing email gateways. A simple DNSMX record change redirects email to FortiMail for analysis.FortiMail then relays safe email to its destination email serverfor delivery.Microsoft 365 API IntegrationFortiMail can be deployed out of line to simplify deployment,so no MX record change is required, and leverage the nativeMicrosoft 365 API to deliver threat detection and post-delivery message clawback. Broad flexibility is possiblewith clawback to create policies that address complianceor unique business requirements, such as building searchparameters based on keywords, file name, or content type.These capabilities can serve as powerful complements tonative Microsoft security features to bolster overall efficacyand reduce risk.Transparent ModeTransparent mode eliminates the need to change the DNSMX record, or to change the existing email server networkconfiguration. Transparent mode is particularly appealing forservice providers that want to extend email security servicesto their customer bases. Not available with FortiMail Cloud.Server ModeThe FortiMail device acts as a standalone messaging serverwith full SMTP email server functionality, including flexiblesupport for secure POP3, IMAP, and WebMail access.5DATA SHEET | FortiMail™6FEATURES99.7% Spam Detection Rate✓⃝✓⃝✓⃝Advanced Multi-Layer Malware Detection✓⃝✓⃝✓⃝Inbound and Outbound Filtering ✓⃝✓⃝✓⃝Integration with Customer LDAP ✓⃝✓⃝✓⃝Secure Message Delivery (TLS)✓⃝✓⃝✓⃝Message Tracking ✓⃝✓⃝✓⃝Virus Outbreak Service✓⃝✓⃝✓⃝Identity-Based Encryption (IBE)✓⃝✓⃝✓⃝Reporting✓⃝✓⃝✓⃝Email Data Loss Prevention✓⃝✓⃝✓⃝Content Disarm and Reconstruction ✓⃝✓⃝URL Click Protection ✓⃝✓⃝Impersonation Analysis ✓⃝✓⃝Cloud Sandboxing✓⃝✓⃝Real-time Scanning of Microsoft 365 Mailboxes ✓⃝Scheduled Scanning of Microsoft 365 Mailboxes✓⃝Post-delivery Clawback of Newly Discovered Email Threats✓⃝Additional Add-on CapabilitiesEmail ContinuityEmail Continuity for FortiMail Cloud is designed to protect valuable productivity by providing emergency mailbox services when organizations experience an outage in their email services.FortiIsolatorFortiIsolator allows users to browse the web in an isolated environment, which renders safe content in a remote container.Dynamic Image Analysis ServiceProtects your organization and employees against inappropriate and sexually explicit images.DATA SHEET | FortiMail™FEATURES SUMMARYMicrosoft 365 Integration– Post-delivery threat clawback– Scheduled scan– Real-time scanning– Internal mail scanning Advanced RMA SupportProfessional services and installation support options7DATA SHEET | FortiMail™8Criteria NDPP, FIPS 140-2 CompliantCriteria NDPP, FIPS 140-2 CompliantCriteria NDPP, FIPS 140-2 Compliant* Protected Email Domains is the total number of email domains that can be configured on the appliance.Domain Associations can be used to enable additional domains which share configuration with the primary domain to which they are assigned. ** Tested using FortiMail 7.0SPECIFICATIONSDATA SHEET | FortiMail™SPECIFICATIONS140-2 Compliant FIPS 140-2 Compliant* Protected Email Domains is the total number of email domains that can be configured on the appliance.Domain Associations can be used to enable additional domains which share configuration with the primary domain to which they are assigned.** Tested using FortiMail 7.09DATA SHEET | FortiMail™10SPECIFICATIONSProtected Email Domains ******2070500100015002000Recipient-Based Policies (Domain / System) — Incoming or Outgoing 60 /300400 / 1500800 / 3000800 / 30001500 / 75001500 / 7500Server Mode Mailboxes1504001500200030003000Antispam, Antivirus, Authentication, and Content Profiles (per Domain / per System)50 / 6050 / 20050 / 40050 / 40050 / 60050 / 600Data Loss Prevention No Yes Yes Yes Yes Yes Centralized Quarantine No Yes Yes Yes Yes Yes Microsoft 365 API IntegrationNoOptionalOptionalOptionalOptionalOptional* Recommended sizing for Gateway and Transparent deployments. For Server Mode, see Server Mode Mailbox metric. If unsure, please validate the model selection by checking the peak mail flow rates and average message size detail with a FortiMail specialist.** FortiMail 7.0.1 has been validated on Nutanix AHV 20201105.2096 and AOS 5.20.1.1.*** Transparent mode deployment is not fully supported on Microsoft HyperV and cloud hypervisors due to limitations in the available network configurations.**** For the initial VM setup, 250GB is required to install the default Fortinet OVF file. After deployment, the default OVF file can be deleted and the disk space set no less than 50 GB.***** ************************************************************************************************************************************.****** Protected Email Domains is the total number of email domains that can be configured on the appliance. Domain Associations can be used to enable additional domains which share configuration with the primary domain to which they are assigned. Advanced management license increases the protected domain limit by 50%.DATA SHEET | FortiMail™ORDER INFORMATIONFor information on ordering, please talk with your Fortinet account manager, or refer to the Ordering Guide for a full list of FortiMail-related SKUs and pricing information. Copyright © 2022 Fortinet, Inc. All rights reserved. Fortinet, FortiGate, FortiCare and FortiGuard, and certain other marks are registered trademarks of Fortinet, Inc., and other Fortinet names herein may also be registered and/or common law trademarks of Fortinet. All other product or company names may be trademarks of their respective owners. Performance and other metrics contained herein were attained in internal lab tests under ideal conditions, and actual performance and other results may vary. Network variables, different network environments and other conditions may affect performance results. Nothing herein represents any binding commitment by Fortinet, and Fortinet disclaims all warranties, whether express or implied, except to the extent Fortinet enters a binding written contract, signed by Fortinet’s General Counsel, with a purchaser that expressly warrants that the identified product will perform according to certain expressly-identified performance metrics and, in such event, only the specific performance metrics expressly identified in such binding written contract shall be binding on Fortinet. For absolute clarity, any such warranty will be limited to performance in the same ideal conditions as in Fortinet’s internal lab tests. Fortinet disclaims in full any covenants, representations, and guarantees pursuant hereto, whether express or implied. Fortinet reserves the right to change, modify, transfer, or otherwise revise this publication without notice, and the most current version of the publication shall be applicable.Fortinet is committed to driving progress and sustainability for all through cybersecurity, with respect for human rights and ethical business practices, making possible a digital world you can always trust. You represent and warrant to Fortinet that you will not use Fortinet’s products and services to engage in, or support in any way, violations or abuses of human rights, including those involving illegal censorship, surveillance, detention, or excessive use of force. Users of Fortinet products are required to comply with the Fortinet EULA (https:///content/dam/fortinet/assets/legal/EULA.pdf) and report any suspected violations of the EULA via the procedures outlined in the Fortinet Whistleblower Policy (https:///domain/media/en/gui/19775/Whistleblower_Policy.pdf).FML-DAT-R56-20220706。

英文虚拟机简介

虚拟机虚拟机指通过软件模拟的具有完整硬件系统功能的、运行在一个完全隔离环境中的完整计算机系统。

Virtual machine by means of simulation software with a complete hardware system, operating in a completely isolated from the environment in the whole computer system.虚拟机有什么用？what is the use of Virtual machine?目前流行的虚拟机软件有VMware(VMWare ACE）、Virtual Box和Virtual PC，它们都能在Windows系统上虚拟出多个计算机，The popular virtual machine software VMware ( VMWare ACE ), Virtual Box and Virtual PC, they can be in the Windows system on a number of virtual computer.虚拟机分类：IBM虚拟机、HP虚拟机、SWsoft虚拟机、SUN虚拟机、Intel虚拟机、AMD 虚拟机、Java虚拟机。

Virtual machines: the IBM virtual machine, virtual machine for HP, SWsoft, SUN virtual machine, a virtual machine virtual machine for Intel, AMD, Java virtual machine virtual machine.我电脑上也装了vmware，VMware 可以使你在一台机器上同时运行二个或更多Windows、DOS、LINUX系统。

与“多启动”系统相比，VMWare采用了完全不同的概念。

信息技术中考试卷英语

Section A: Vocabulary and Grammar (30%)1. Choose the correct word to complete each sentence.a. The ___________ of the new software has greatly improved our work efficiency.a) invention b) discovery c) development d) creationb. She was praised for her ___________ in the project.a) participation b) involvement c) engagement d) commitmentc. The company is planning to ___________ a new branch office in the city center.a) establish b) set up c) found d) initiated. The lecture on artificial intelligence was so ___________ that it left a deep impression on us.a) boring b) engaging c) tedious d) dull2. Fill in the blanks with the appropriate forms of the given verbs.a. The manager ___________ (inform) the staff about the new policy.b. They ___________ (plan) a trip to Europe next summer.c. By the end of the year, we ___________ (complete) all the projects.d. The company ___________ (launch) a new product line next month.3. Complete the sentences with the correct prepositions.a. He is very ___________ (interested) in computer programming.b. The new software is ___________ (use) in many industries.c. We need to improve our skills to keep up with the ___________ (change) in technology.d. The report will be ___________ (submit) to the management team next week.4. Correct the errors in the following sentences.a. The internet has become an essential tool for communication and information sharing.b. Many companies are investing in big data analytics to gaininsights into customer behavior.c. Virtual reality technology is being used in the medical field for training and simulations.d. Cloud computing has made it possible for businesses to store and access data remotely.Section B: Reading Comprehension (20%)Read the following passage and answer the questions that follow.Passage:The rapid development of information technology has revolutionized the way we live and work. One of the most significant advancements is the Internet of Things (IoT), which connects various devices and systems to the internet, enabling them to communicate and exchange data. This has led to the creation of smart homes, smart cities, and smart industries, making our lives more convenient and efficient.The IoT has numerous benefits. For instance, in smart homes, smart appliances can be controlled remotely, allowing homeowners to save energy and money. In smart cities, IoT technology can be used to manage traffic, reduce pollution, and improve public safety. In smart industries, IoT can optimize production processes, reduce downtime, and enhance product quality.However, the IoT also presents challenges. Security and privacy concerns are among the most significant issues. As more devices are connected to the internet, the risk of cyberattacks increases. Additionally, the vast amount of data generated by IoT devices raises concerns about data storage and processing capabilities.Questions:1. What is the main idea of the passage?2. According to the passage, what are some benefits of the IoT?3. What are two challenges mentioned in the passage?4. In your opinion, what measures can be taken to address the challenges of the IoT?Section C: Writing (50%)Write an essay on the following topic:“Inform ation technology has had a profound impact on our lives. Discuss the positive and negative effects of information technology on society, and suggest ways in which we can mitigate its negative impacts.”Your essay should be at least 250 words in length, well-organized, and include relevant examples and details to support your arguments.。

虚拟化保护的介绍文档

that need to be addressed in the context of an organization’s approach to security
risk management (SRM).
虚拟化，在计算的最新革命，是改变企业IT的面貌
在全球几乎每一个部门。今天，据估计，每八台服务器
server or as a virtual machine.
McAfee VirusScan Enterprise可为脱机
虚拟影像
的McAfee ? VirusScan的?企业（VSE）的离线
虚拟影像是业界第一款安全
解决方案是脱机的虚拟专用
环境。它扫描，清除和更新
反恶意软件安全配置文件的虚拟机的休眠
虚拟机的主要优点
（VM），企业应用更容易
提供和部署物理
服务器。在某些情况下，它可以采取尽可能少
15分钟带来了一个虚拟机上的应用程序。
但易于部署的后果是VM
扩散。越来越多的虚拟机是不断
正在创建的整个IT环境
即使很小的负载。这种扩散
导致虚拟机需要定期
带来的修补离线运作的虚拟机，
VSE for Offline Virtual Images covers the two key
scenarios that are of greatest concern to corporate
IT departments: disaster recovery and the test and
in nearly every sector worldwide. Today, it is estimated that one in every eight servers

计算机正在改变人们的交流方式的英语作文

计算机如何重塑我们的交流方式In the digital age, computers have revolutionized the way we communicate, transforming the landscape of human interaction in profound and unprecedented ways. From the earliest days of telegraphy to the present era of social media and instant messaging, technology has consistently altered the fabric of our conversations and connections.The advent of the computer marked a significant milestone in communication history. Initially, computers enabled the exchange of information through text-based interfaces, revolutionizing the speed and efficiency of data transmission. This shift away from traditional methods of communication, such as letters and telegrams, marked a significant leap forward in terms of speed and accessibility.As technology advanced, the internet emerged as a new medium for communication, connecting people across the globe. Email, in particular, became a ubiquitous tool for personal and professional communication, enabling messages to be sent and received instantaneously, regardless of physical location. This转变 in communication patterns notonly increased efficiency but also fostered new forms of interpersonal relationships, as people could stay in touch with friends and family members far away.Social media platforms further revolutionized communication by introducing new ways to share and consume information. These platforms allowed individuals to create profiles, connect with others, and share their thoughts, experiences, and creations with a wide audience. The rise of social media also gave rise to new forms of communication, such as tweeting, posting updates, and sharing photos and videos, all of which have become integral to modern-day communication.Moreover, the advent of messaging apps like WhatsApp, WeChat, and Messenger has further transformed the communication landscape. These apps enable real-time, instant messaging, voice calls, and video conferencing, effectively blurring the lines between personal and professional communication. The convenience and accessibility of these apps have made it possible for people to stay connected and communicate seamlessly, regardless of their location or time zone.The impact of computers on communication has also been felt in the realm of business and professional communication. Video conferencing tools like Zoom and Skype have made it possible for teams and organizations to collaborate and communicate effectively, regardless oftheir physical locations. This has led to a more globalized and interconnected workforce, where people can work together seamlessly, regardless of their geographical separations.In addition, the rise of chatbots and artificial intelligence (AI) has further transformed the communication landscape. These technologies enable automated responses and interactions, providing customers and users withinstant access to information and assistance. Chatbots and AI have revolutionized customer service, making it possible for companies to provide round-the-clock support and assistance, while also improving efficiency and reducing costs.The computer's influence on communication has not only transformed the way we interact but has also had profound impacts on our society and culture. The rise of the digitalage has given rise to new forms of expression and communication, such as memes, emojis, and digital art, all of which have become integral to modern-day communication. The computer has also enabled the creation and sharing of vast amounts of information and knowledge, fostering a more informed and connected society.In conclusion, computers have revolutionized the way we communicate, transforming the landscape of humaninteraction in profound and unprecedented ways. From the earliest days of telegraphy to the present era of social media and instant messaging, technology has consistently altered the fabric of our conversations and connections. The rise of the digital age has not only transformed the way we interact but has also had profound impacts on our society and culture, fostering a more connected, informed, and expressive world.**计算机如何重塑我们的交流方式**在数字时代，计算机彻底改变了我们的交流方式，以深刻而前所未有的方式重塑了人类互动的景观。

计算机辅助系统的英汉互译

计算机辅助系统的英汉互译全文共四篇示例，供读者参考第一篇示例：计算机辅助系统（Computer-Aided Systems，简称CAS）是一种借助计算机技术，为人类的工作和生活提供智能化、信息化支持的系统。

它通过引入计算机技术，使得人们在处理信息、执行任务和决策时能够更加高效、精确、快速地完成工作。

计算机辅助系统通常包括软件系统、硬件设备和人机界面三个部分。

软件系统是计算机辅助系统的核心部分，它通过具有智能化、自动化和信息化功能的程序来协助用户完成各种任务。

硬件设备是支持软件运行的物理设备，包括计算机、服务器、打印机等。

人机界面则是用户与计算机辅助系统进行交互的界面，包括显示器、键盘、鼠标等。

计算机辅助系统的应用领域非常广泛，涵盖了工业、教育、医疗、金融等各种行业。

在工业领域，计算机辅助系统可以帮助企业实现生产过程的自动化和智能化，提高生产效率和产品质量。

在教育领域，计算机辅助系统可以为教师和学生提供多样化的教学资源和工具，丰富教学手段，提高教学效果。

在医疗领域，计算机辅助系统可以通过医学影像处理、智能诊断等技术帮助医生提高诊断准确性和治疗效果。

在金融领域，计算机辅助系统可以帮助银行、证券公司等金融机构实现业务流程的自动化和信息化，提高服务效率和风险控制能力。

计算机辅助系统的发展离不开计算机技术的进步和人工智能的发展。

随着计算机硬件性能的不断提高和软件技术的不断创新，计算机辅助系统在功能和性能上得到了持续提升。

人工智能技术的快速发展为计算机辅助系统的智能化提供了技术支持，使得系统能够更好地理解和分析用户的需求，提供更加个性化和智能化的服务。

计算机辅助系统也面临着一些挑战和问题。

首先是数据安全和隐私保护问题，随着计算机应用的普及和数据量的增加，用户的个人隐私和数据安全面临着更大的风险。

其次是系统的可靠性和稳定性问题，计算机辅助系统的软件和硬件故障可能导致系统无法正常运行，给用户带来不便和损失。

最后是人机交互和用户体验问题，计算机辅助系统的人机界面设计和用户体验决定了系统的易用性和用户满意度。

电气安全名词术语GB

标准名称：电气安全名词术语GB 4776-84标准编号：GB 4776-84标准正文：国家标准1984-11-30发布1988-07-01实施1基本概念1.1保安性fail-safe为防止产品本身的危险故障而设计的性能。

1.2正常状态nromal condition所有用于防止危险的设施均无损坏的状态。

1.3电气事故electric accident由电流、电磁场、雷电、静电和某些电路故障等直接或间接造成建筑设施、电气设备毁坏、人、动物伤亡，以及引起火灾和爆炸等后果的事件。

1.4触电电击electric shock电流通过人体或动物体而引起的病理、生理效应。

1.5电磁场伤害injury due to electromagnetic field人体在电磁场作用下吸收能量受到的伤害。

1.6破坏性放电介质击穿disruptive discharge dielectric breakdown固体、液体、气体介质及其组合介质在高电压作用下，介质强度丧失的现象。

破坏性放电时，电极间的电压迅速下降到零或接近于零。

1.7短路short circuit通过比较小的电阻或阻抗，偶然地或有意地对一个电路中在正常情况下处于不同电压下的两点或几点之间进行的连接。

1.8绝缘故障insulation fault绝缘电阻的不正常下降。

1.9接地故障earth fault由于导体与地连接或对地绝缘电阻变得小于规定值而引起的故障。

1.10过电流overcurrent超过额定电流的电流。

1.11过电压overvoltage超过额定电压的电压。

1.12过负载overload超过额定负载的负载。

1.13导电部分conductive part能导电，但不一定承载工作电流的部分。

1.14带电部分live part正常使用时被通电的导体或导电部分，它包括中性导体，但按惯例，不包括保护中性导体(PEN导体)。

注：此术语不一定意味着触电危险。

1.15外露导电部分exposed conductive part电气设备能被触及的导电部分。

计算机专业英语第二版课后翻译答案

Unite 1Section A: 1、artificial intelligence 人工智能2、paper-tape reader 纸带阅读器3、Optical computer 光学计算机4、Neural network 神经网络5、Instruction set 指令集6、Parallel processing 并行处理器7、Difference engine差分机8、Versatile logical element 多用途逻辑元件9、Silicon substrate 硅衬底10、Vaccum tube 真空管11、数据的存储与管理the storage and management of data12、超大规模集成电路large-scale integrated circuit13、中央处理器central processing unit14、个人计算机personal computer15、模拟计算机analog computer16、数字计算机digital computer17、通用计算机general purpose computer18、处理器芯片processor chip19、操作指令operating instructions20、输入设备input devicesSection B1、artificial neural network 人工智能神经网络2、Computer architecture 计算机体系结构3、Robust computer program 健壮的计算机程序4、Human-computer interface 人机接口5、Knowledge representation 知识代表6、数值分析numerical analysis7、程序设计环境programming environment8、数据结构data structure9、存储和检索信息store and retrieve information10、虚拟现实virtual realityUnit 2Section A：1、function key 功能键2、V oice recognition module 声音识别调制器3、Touch-sensitive region 触敏扫描仪4、Address bus 地址总线5、Flatbed scanner 平板扫描仪6、Dot-matrix printer 矩阵式打印机7、Parallel connection 并行连接8、Cathode ray tube 阴极射线管9、Video game 电子游戏10、Audio signal 音频信号11、操作系统operating system12、液晶显示liquid crystal display13、喷墨打印机inkjet printer14、数据总线data bus15、串行连接serial connection16、易失性存储器volatile memory17、激光打印机laser printer18、磁盘存储器floppy disc19、基本输入输出系统basic input/output system20、视频显示器video displaySection B:1、interrupt handler 中断处理程序2、Virtual memory 虚拟内存3、Context switch 上下文转换4、Main memory 主存5、Bit pattern 位模式6、外围设备peripheral device7、进程表process table8、时间片time slice9、图形用户界面graphics user interface10、海量存储器mass storageUnit 3Section A:1、storage register 存储寄存器2、Function statement 函数语句3、Program statement 程序语句4、Object-oriented language 面向对象语言5、Assembly language 汇编语言6、Intermediate language 中间语言7、Relational language 关系语言8、Artificial language 人工语言9、Data declaration 数据声明10、SQL 结构化查询语言11、可执行程序executable program12、程序模块program module13、条件语句conditional statement14、赋值语句assignment statement15、逻辑语言logic statement16、机器语言machine language17、函数式语言functional language18、程序设计语言programming language19、运行计算机程序run a omputer program20、计算机程序员computer programmerSection B1、native code 本机代码2、Header file 头文件3、Multithreaded program 多线程程序4、Java-enabled browser 支持Java的浏览器5、Mallicious code6、机器码machine code7、汇编码assembly code8、特洛伊木马程序trojan9、软件包software package10、类层次class hierarchyUnit 4Section A1、inference engine 推理机2、System call 系统调用3、Compiled language 编译执行的语言4、Parellel computing 并行计算5、Pattern matching 模式匹配6、Memory location 存储单元7、Interpreter program 解释程序8、Library routine 库程序9、Intermediate program 中间程序10、Source file 源文件11、解释执行的语言interpreted language12、设备驱动程序device driver13、源程序source program14、调试程序debugger15、目标代码object code16、应用程序application program17、实用程序utility program18、逻辑程序logic program19、黑盒ink cartridge20、程序的存储与执行storage and execution of program Section B1、Messaging model 通信模式2、Common language runtime 通用语言运行时刻（环境）3、Hierarchical namespace 分层的名称空间4、Development community 开发社区5、CORBA 公共对象请求代理体系结构6、基本组件basic components7、元数据标记metadata token8、虚拟机VM virtual machine9、集成开发环境IDE（intergrated development environment）10、简单对象访问协议SOAP(simple object access protocol) Unit 5Section A1、system specification 系统规范2、Unit testing 单元测试3、Software life cycle 软件的生命周期4、System validation process 系统验证过程5、Evolutionary development process 进化发展过程6、Simple linear model 简单线性模型7、Program unit 程序单元8、Throwaway prototype 一次性使用原型9、Text formatting 文本格式10、System evolution 系统演变11、系统设计范例paradigm for system design12、需求分析与定义Requirements analysis and definition13、探索式编程方法exploratory programming approach14、系统文件编制system documentation15、瀑布模型waterfall model16、系统集成system integration17、商用现成软件commercial off-the-shelf software18、基于组件的软件工程component-based software engineering19、软件维护工具software maintenance tool20、软件复用software reuseSection B1、check box 复选框2、Structured design 结构化设计3、Building block 构建模块4、Database schema 数据库模式5、Radio button 单选按钮6、系统建模技术system modeling techniques7、模型驱动开发MDD(model-driven development)8、数据流程图data flow diagram9、下拉式菜单drop-down10、滚动条scroll barUnit 6Section A1、end user 终端用户2、Atomic operation 原子操作3、Database administrator 数据库管理员4、Relational database model 关系数据库模型5、Local data 本地数据6、Object-oriented database 面向对象的数据库7、Database management system 数据库管理系统8、Entity-relationship model 实体关系模型9、Distributed database 分布式数据库10、Flat file 展开文件11、二维表two-dimensional table12、数据属性data attributes13、数据库对象database object14、存储设备storage device15、数据类型data type16、数据插入与删除insertion and deletion17、层次数据库模型hierarchical18、数据库体系结构database architecture19、关系数据库管理系统ralational database management system20、全局控制总线global control busSection B1、nonvolatile storage system 易失性存储系统2、Equitment malfunction 设备故障3、Wound-wait protocol 损伤等待协议4、Exclusive lock 排它锁5、Database integrity 数据库完整性6、共享锁shared lock7、数据库实现database implementation8、级联回滚cascading rollback9、数据项data item10、分时操作系统time sharing operating system ;Unit 7Section A1、microwave radio 微波无线电2、digital television 数字电视3、DSL 数字用户线路4、analog transmission 模拟传输5、on-screen pointer 屏幕上的指针6、computer terminal 计算机终端7、radio telephone 无线电话8、cellular telephone 蜂窝电话，移动电话，手机9、decentralized network 分散型网络10、wire-based internal network 基于导线的内部网络，有线内部网11、光缆fiber-optic cable12、传真机fax machine13、线通信wireless communications14、点对点通信point-to-point communications15、调制电脉冲modulated electrical impulse16、通信卫星communication(s) satellite17、电报电键telegraph key18、传输媒体transmission medium (或media)19、无绳电话cordless telephone20、金属导体metal conductorSection B1、bit map 位图2、parallel port 并行端口3、direct memory access (DMA) 直接存储器存取4、universal serial bus 通用串行总线5、general-purpose register 通用寄存器6、电路板circuit board7、串行通信serial communication8、数码照相机digital camera9、存储映射输入/输出memory-mapped I/O10、有线电视cable televisionUnit 8Section A1、file server 文件服务器2、carrier sense 载波检测3、Protocol suite 协议族4、Peer-to-peer model 点对点模型5、bus topology network 总线拓扑网络6、inter-machine cooperation 计算机间合作7、Ethernet protocol collection 以太网协作集8、Proprietary network 专有网络9、utility package 实用软件包10、star network 星形网络11、局域网local area network (LAN)12、令牌环token ring13、无线网络wireless network14、封闭式网络closed network15、环形拓扑网络ring topology16、客户/服务机模型client/server model17、网络应用程序network application18、进程间通信interprocess communication19、打印服务机printer server20、广域网wide area networkSection B1、routing path 路由选择通路2、dual-ring topology 双环形拓扑结构3、extended star topology 扩展星形拓扑结构4、backbone network 基干网，骨干网5、mesh topology网络拓扑结构6、同轴电缆coaxial cable7、逻辑拓扑结构logical topology8、无冲突连网环境collision-free networking environment9、树形拓扑结构tree topology10、目的地节点destination nodeUnit 9Section A1、cell phone 蜂窝电话，移动电话，手机2、IP address 网际协议地址，IP地址3、autonomous system 自主系统4、dial-up connection 拨号连接5、network identifier 网络标识符6、binary notation 二进制记数法7、mnemonic name 助记名，缩写名8、Internet-wide directory system 因特网范围的目录系统9、name server 名称服务器10、Internet infrastructure 因特网基础结构11、助记地址mnemonic address12、网吧cyber cafe13、宽带因特网访问broadband Internet access14、顶级域名top-level domain (TLD)15、因特网编址Internet addressing16、点分十进制记数法dotted decimal notation17、因特网服务提供商Internet service provider (ISP)18、专用因特网连接dedicated Internet connection19、主机地址host address20、硬件与软件支持hardware and software support Section B1、incoming message 来报，到来的报文2、application layer 应用层3、utility software 实用软件4、sequence number （顺）序号，序列号5、remote login capabilities 远程登录能力6、端口号port number7、软件例程software routine8、传输层transport layer9、文件传送协议FTP（File Transfer Protocol）10、万维网浏览器Web browserUnit 10Section A1、mailing list 邮件发送清单，邮件列表2、proprietary software 专有软件3、cc line 抄送行4、bcc line 密送行5、forwarded e-mail messages 转发的电子邮件6、e-mail convention 电子邮件常规7、click on an icon 点击图标8、confidential document 密件，秘密文件9、classified information 密级信息10、recovered e-mail message 恢复的电子邮件11、常用情感符commonly used emoticon12、已删除电子邮件deleted e-mail13、电子系统electronic system14、附件行Attachments line15、版权法copyright law16、电子邮件网规e-mail netiquette17、信息高速公路information superhighway18、签名文件signature file19、电子数据表程序spreadsheet program20、文字处理软件word processorSection B1、web-authoring software 网络写作软件2、template generator 模版生成程序3、navigation page 导航页面4、corporate logo 公司标识5、splash page 醒目页面，过渡页6、导航条navigation bar7、节点页面node page8、网站地图site map9、可用性测试usability testing10、图形交换格式gif（Graphics Interchange Format）Unit 11Section A1、customized marketing strategy 定制的营销策略2、B2G transaction 企业对政府交易3、mobile telephone 移动电话4、dot-com bust 网络不景气5、smart card 智能卡，灵巧卡6、digital piracy 数字盗版7、dot-com boom 网络繁荣8、C2C transaction 消费者对消费者交易9、Web auction site 拍卖网站10、fingerprint reader 指纹读取器11、射频识别装置radio-frequency identification (RFID) device12、电子数据交换electronic data interchange (EDI)13、库存管理技术inventory management technology14、知识产权intellectual property15、条形码bar code16、货币兑换currency conversion17、电子图书electronic book18、视网膜扫描仪retina scanner19、个人数字助理personal digital assistant (PDA)20、企业对企业电子商务B2B electronic commerceSection B1、software suite 软件套件2、text box 文本框3、virtual checkout counter 虚拟付款台4、static catalog 静态目录5、browser session 浏览器会话期6、动态目录dynamic catalog7、购物车软件shopping cart software8、供应链supply chain9、企业资源计划软件enterprise resource planning (ERP) software10、税率tax rateUnit 12Section A1、encryption program 加密程序2、deletion command 删除命令3、authorized user 授权的用户4、backup copy 备份5、voltage surge 电压浪涌6、circuit breaker 断路器7、electronic component 电子元件（或部件）8、data-entry error 数据输入错误9、electronic break-in 电子入侵10、power line 电力线，输电线11、检测程序detection program12、电源power source13、破坏性计算机程序destructive computer program14、计算机病毒computer virus15、软件侵权software piracy16、硬盘驱动器hard-disk drive17、病毒检查程序virus checker18、主存储器primary storage19、电子公告板electronic bulletin board20、浪涌电压保护器surge protectorSection B1、phishing attack 网络钓鱼攻击2、graphics card 显（示）卡3、heuristic analysis 试探性分析4、infected file 被感染文件5、virus dictionary 病毒字典6、数据捕获data capture7、恶意软件malicious software8、病毒特征代码virus signature9、防病毒软件antivirus software10、内存驻留程序memory-resident program。

云计算HCIP练习题(含参考答案)

云计算HCIP练习题（含参考答案）一、单选题（共52题，每题1分，共52分）1.在 FusionCompute 中，以下描述错误的是哪一项？A、未勾选”与所选主机绑定“选项，虚拟机将不能添加直通设备B、若与 USB 设备绑定，虚拟机将无法迁移至其他主机C、虚拟机 HA 是虚拟机热迁移的一种D、支持虚拟机跨集群迁移正确答案：C2.在 FusionCompute 中，已切换为 SR-IOV 模式的网卡可以更换为不支持 SR-IOV 模式的网卡。

A、TRUEB、FALSE正确答案：A3.在链接克隆虚拟桌面方案中，相同 OS 多个客户虚拟机共享同一母镜像，母镜像可统一升级、维护。

A、TRUEB、FALSE正确答案：A4.下列关于 IMC 的功能描述正确的是？A、IMC 配置可以确保集群内的主机向虚拟机提供相同的 CPU 功能集，即使这些主机的实际 CPU 不同，也不会因 CPU 不兼容而导致迁移虚拟机失败。

B、如果在已设置 IMC 的集群中添加主机，则主机支持的 CPU 功能集必须等于或低于集群的 IMC 功能集。

C、设置集群 IMC 模式后，所有的虚拟机使用设置后的 IMC 策略。

D、目的主机和源主机 CPU 类型不一致不影响虚拟机迁移。

正确答案：A5.在创建FusionCare 信息收集任务前，必须确保客户端时间、FusionCare 服务器时间以及被收集节点的机器时间一致，否则会出现信息收集不正常的情况。

A、TRUEB、FALSE正确答案：A6.在 FusionAccess 日常运维过程中，若系统与 NTP 服务器的连接异常，WI 与 AD 的时差超过了 5 分钟，将导致用户将无法正常妾录虚拟机。

A、TRLUEB、FALSE正确答案：A7.FusionCompute 配置上行链路时，需要添加下列哪种类型的端口A、存储接口B、端口组C、BMC 网口D、聚合网口正确答案：D8.在 FusionAccess 中，使用同一个虚拟机模板发放的虚拟机桌面，具有与虚拟机模板相同的 CPU 个数和内存大小，且无法更改。

VirtualMachine虚拟机原理

VirtualMachine虚拟机原理
1.虚拟机原理：虚拟机(Virtual Machine)，顾名思义，就是虚拟出来的⼀台计算机，简单的来说虚拟机就是⽤软件来模拟出计算机软硬
件环境，通过共享宿主机的部分硬件，以及宿主机CPU模拟的部分虚拟硬件，建⽴完整的运⾏环境。

虚拟机所安装的系统根实际的计算机操作系统没有什么区别，同样会感染病毒，但是由于虚拟机是封闭的虚拟环境，如果排除通过虚拟机与宿主机的⽹络连接，则
不
会影响到宿主机及宿主机所在的⽹络。

在虚拟机中，中央处理器芯⽚从系统其它部分划分出⼀段存储区域，操作系统和应⽤程序运⾏
　在“保护模式”环境下。

如果在某虚拟机中出现程序冻结现象，这并不会影响运⾏在虚拟机外的程序操作和操作系统的正常⼯作。

在　真实计算机系统中，操作系统组成中的设备驱动控制硬件资源，负责将系统指令转化成特定设备控制语⾔。

在假设设备所有权独⽴的　情况下形成驱动，这就使得单个计算机上不能并发运⾏多个操作系统。

虚拟机则包含了克服该局限性的技术。

虚拟化过程引⼊了低层设备资源重定向交互作⽤，⽽不会影响⾼层应⽤层。

通过虚拟机，⽤户可以在单个计算机上并发运⾏多个操作系统。

2.使⽤虚拟机的⽬的：完成许多不能或不⽅便直接在宿主机上完成的⼯作。

例如：玩游戏开多个窗⼝，实验安装各种操作系统，实验安装新软件，测试病毒、⿊客⼯具……。

虚拟聊天脱离现实英语作文

虚拟聊天脱离现实英语作文In today's digital era, virtual chat has become a ubiquitous part of our lives. From social media platforms to messaging applications, we are constantly connected to a virtual world that offers an escape from the realities of our daily lives. While virtual chat provides a convenient medium for communication, it also raises concerns about its potential to detach us from the real world.The appeal of virtual chat lies in its anonymity and accessibility. People can communicate without revealing their true identities, allowing them to express themselves freely without the fear of judgment. This freedom can be seductive, especially for those who feel inhibited or uncomfortable in real-world interactions. Virtual chat also offers a sense of control and convenience, as users can choose when and how they want to engage with others, without the constraints of face-to-face communication.However, the constant immersion in virtual chat can have negative consequences. One such consequence is the loss of social skills. Virtual chat often lacks the non-verbal cues and subtleties of face-to-face communication, such as eye contact and body language. Over time, this can lead to a decrease in the ability to interpret and respond to these cues in real-world interactions, resulting in awkward or ineffective social encounters.Moreover, virtual chat can foster a sense of isolation and detachment from reality. While it may provide a temporary escape from the stresses of daily life, it can also lead to a decreased sense of empathy and connection with others. People may become accustomed to theartificiality of virtual interactions and lose touch with the real world, missing out on the rich experiences and connections that can only be found in person.Additionally, virtual chat can contribute to the spread of misinformation and cyberbullying. Without theconstraints of real-world consequences, people may feel freer to express negative opinions or spread false information. This can have harmful effects on individualsand communities, leading to a breakdown of trust and a sense of division.In conclusion, while virtual chat provides a convenient and anonymous medium for communication, it also poses risks of detachment from reality. It is important to maintain a balance between virtual and real-world interactions to ensure that we do not lose touch with the world around us. We should be mindful of the potential negative consequences of virtual chat and strive to cultivate healthy social skills and connections with others.**虚拟聊天：逃离现实的避风港**在当今的数字化时代，虚拟聊天已经成为我们生活中无处不在的一部分。

虚拟聊天脱离现实英语作文

Virtual Chats and Their Divergence fromRealityIn the modern era, the rise of digital technology has transformed the way we communicate, with virtual chats becoming a ubiquitous part of our daily lives. From social media platforms to instant messaging apps, we are constantly engaged in digital conversations, often neglecting the importance of face-to-face interactions. However, this shift towards virtual communication has led to a concerning disconnect from reality, blurring the lines between the virtual and physical worlds.Firstly, virtual chats often lack the emotional depth and nuance of face-to-face conversations. In a digital environment, it is easier to hide behind a screen, masking our true emotions and intentions. This can lead to miscommunication and a lack of understanding, as we rely more on text and emojis to convey our feelings rather than body language, tone of voice, or facial expressions. As a result, virtual chats can become superficial and lack the authenticity of real-world interactions.Moreover, the constant stream of virtual communication can lead to a feeling of overstimulation and a loss of focus. With constant notifications and messages flooding our smartphones, it can be difficult to disconnect and focus on the present moment. This can contribute tofeelings of anxiety and stress, as we constantly feel the need to be connected and responsive.Furthermore, the virtual world often presents an idealized version of reality, where people can carefully curate their online personas and lives. This can lead to a distorted perception of reality, as we compare our own imperfect lives to the seemingly perfect lives of others on social media. This can have negative psychological effects, leading to feelings of inadequacy and dissatisfaction.It is important to recognize the limitations of virtual chats and to strike a balance between digital and face-to-face communication. While virtual chats can be convenient and efficient, they should not replace the rich and meaningful interactions we have in the real world. Face-to-face communication allows us to connect with others on adeeper level, understand their emotions and perspectives, and form meaningful relationships.Moreover, it is crucial to develop healthy habits when engaging in virtual chats. We should set boundaries and limits on our digital usage, allowing ourselves time to disconnect and focus on other aspects of our lives. Additionally, we should be mindful of the content we consume online and strive to maintain a realistic perspective of the world.In conclusion, while virtual chats have become an integral part of our lives, it is essential to recognize their limitations and the potential negative impact they can have on our perception of reality. By striking a balance between digital and face-to-face communication and developing healthy habits, we can ensure that our virtual interactions do not detract from the richness and authenticity of our real-world experiences.**虚拟聊天与现实脱节**在现代社会，数字技术的崛起改变了我们的交流方式，虚拟聊天已成为我们日常生活中无处不在的一部分。

虚拟主机技术名词解释 -回复

虚拟主机技术名词解释-回复
虚拟主机技术，也称为“共享主机”或“虚拟服务器”，是一种在单一的物理服务器上通过软件实现多个独立、隔离的“虚拟”服务器的技术。

每个虚拟主机都有其专属的域名、IP地址、文件存储空间、内存、CPU资源以及带宽等配置，可以独立运行其操作系统和应用程序，为用户提供与独立主机相似的功能和服务。

这项技术的核心在于服务器的虚拟化，它通过对硬件资源进行抽象、转换后，再进行动态分配，使得一台服务器上的不同虚拟主机之间互不影响，各自以为自己在独占使用整台服务器。

这样既提高了硬件资源的利用率，又降低了用户的网站建设和维护成本，是目前互联网服务中广泛应用的一种技术手段。

虚拟机

·正常的方法返回
如果当前方法正常地结束了，在执行了一条具有正确类型的返回指令时，调用的方法会得到一个返回值。
Java
执行环境在正常返回的情况下用于恢复调用者的寄存器，并把调用者的程序计数器增加一个恰当的数值，以跳过已执行过的方法调用指令，然后在调用者的执行环境中继续执行下去。
·异常和错误传播
异常情况在Java中被称作Error(错误)或Exception(异常)，是Throwable类的子类，在程序中的原因是：①动态链接错，如无法找到所需的class文件。②运行时错，如对一个空指针的引用。
Java
每个原始数据类型都有专门的指令对它们进行必须的操作。每个操作数在栈中需要一个存储位置，除了long和double型，它们需要两个位置。操作数只能被适用于其类型的操作符所操作。例如，压入两个int类型的数，如果把它们当作是一个long类型的数则是非法的。在Sun的虚拟机实现中，这个限制由字节码验证器强制实行。但是，有少数操作(操作符dupe和swap)，用于对运行时数据区进行操作时是不考虑类型的。 ※无用单元收集堆 Java的堆是一个运行时数据区，类的实例(对象)从中分配空间。Java语言具有无用单元收集能力：它不给程序员显式释放对象的能力。Java不规定具体使用的无用单元收集算法，可以根据系统的需求使用各种各样的算法。
01 技术
03 分类
目录
02 虚拟系统 04 安装
05 云中配置
07 主要用处
目录
06 资源分配 08 常用软件
技术
技术
虚拟机技术是虚拟化技术的一种，所谓虚拟化技术就是将事物从一种形式转变成另一种形式，最常用的虚拟化技术有操作系统中内存的虚拟化，实际运行时用户需要的内存空间可能远远大于物理机器的内存大小，利用内存的虚拟化技术，用户可以将一部分硬盘虚拟化为内存，而这对用户是透明的。又如，可以利用虚拟专用技术（VPN）在公共络中虚拟化一条安全，稳定的“隧道”，用户感觉像是使用私有络一样。

虚拟机摘要

虚拟机（Virtual Machine）指通过软件模拟的具有完整硬件系统功能的、运行在一个完全隔离环境中的完整计算机系统。

一般意义的虚拟机：通过虚拟机软件，你可以在一台物理计算机上模拟出一台或多台虚拟的计算机，这些虚拟机完全就像真正的计算机那样进行工作，例如你可以安装操作系统、安装应用程序、访问网络资源等等。

对于你而言，它只是运行在你物理计算机上的一个应用程序，但是对于在虚拟机中运行的应用程序而言，它就像是在真正的计算机中进行工作。

因此，当我在虚拟机中进行软件评测时，可能系统一样会崩溃，但是，崩溃的只是虚拟机上的操作系统，而不是物理计算机上的操作系统，并且，使用虚拟机的“Undo”（恢复）功能，我可以马上恢复虚拟机到安装软件之前的状态在详细介绍之前，有几个概念要说明：1? VM（Virtual Machine）——虚拟机，指由Vmware模拟出来的一台虚拟的计算机，也即逻辑上的一台计算机；2?HOST——指物理存在的计算机，Host′s OS指HOST上运行的操作系统；3? Guest OS——指运行在VM上的操作系统。

例如在一台安装了Windows NT的计算机上安装了Vmware，那么，HOST指的是安装Windows NT的这台计算机，其Host′s OS为Windows NT。

VM上运行的是Linux，那么Linux即为Guest OS。

一、Vmware的特点1.?可同时在同一台PC上运行多个操作系统，每个OS都有自己独立的一个虚拟机，就如同网络上一个独立的PC。

2.?在Windows NT/2000上同时运行两个VM，相互之间可以进行对话，也可以在全屏方式下进行虚拟机之间对话，不过此时另一个虚拟机在后台运行。

3.?在VM上安装同一种操作系统的另一发行版，不需要重新对硬盘进行分区。

4.?虚拟机之间共享文件、应用、网络资源等。

5.?可以运行C/S方式的应用，也可以在同一台计算机上，使用另一台虚拟机的所有资源。

vm 壳原理

vm 壳原理虚拟机壳（Virtual Machine Shell）是一种将虚拟机和容器技术相结合的新型技术。

它可以将传统虚拟机的强隔离特性和容器的轻量级特性结合起来，从而提供了更加灵活和高效的虚拟化环境。

虚拟机壳的原理主要包括以下几个方面：1. 虚拟机技术：虚拟机壳是建立在虚拟机技术基础之上的。

虚拟机是一种软件实现的计算机系统，可以在一个物理计算机上运行多个虚拟机实例，每个虚拟机实例都拥有独立的操作系统和应用程序。

虚拟机技术通过虚拟化技术将物理计算机资源（如CPU、内存、存储等）进行抽象和隔离，从而实现多个虚拟机实例之间的隔离和共享。

2. 容器技术：虚拟机壳也利用了容器技术的优势。

容器是一种轻量级的虚拟化技术，可以在同一物理机上运行多个容器实例，每个容器实例都拥有独立的文件系统和运行环境。

容器技术通过容器引擎实现了对容器的隔离和管理，使得容器之间可以共享操作系统内核，从而实现了更高的运行效率和资源利用率。

3. 虚拟机壳的实现：虚拟机壳通过虚拟机技术实现了对虚拟机实例的隔离和管理，同时通过容器技术实现了对容器实例的轻量级化和高效化。

虚拟机壳可以将虚拟机实例和容器实例结合起来，实现了虚拟机的强隔离特性和容器的轻量级特性的双重优势。

虚拟机壳可以实现虚拟机实例的动态创建、启动、停止和销毁，同时可以实现容器实例的快速部署、扩展和管理。

4. 虚拟机壳的优势：虚拟机壳具有灵活性、高效性和安全性的优势。

虚拟机壳可以根据实际需求动态调整虚拟机实例和容器实例的数量和配置，从而实现了资源的高效利用和运行的灵活性。

虚拟机壳可以实现虚拟机实例和容器实例的隔离和共享，保障了应用程序的安全性和稳定性。

总的来说，虚拟机壳是一种将虚拟机和容器技术相结合的新型虚拟化技术，它可以实现虚拟机的强隔离和容器的轻量级的双重优势，具有灵活性、高效性和安全性的优势，可以满足各种应用场景的需求。

虚拟机壳的原理和实现方式为虚拟化技术的发展和应用带来了新的机遇和挑战，有望成为未来虚拟化技术的重要发展方向。

虚拟化和虚拟机基本概念

虚拟化和虚拟机基本概念虚拟化和虚拟机基本概念虚拟化主要指的是特殊的技术，通过隐藏特定计算平台的实际物理特性，为用户提供抽象的、统一的、模拟的计算环境（称为虚拟机）(IBM定义)。

虚拟化为有效利用大型机的资源提供了技术支持。

虚拟机技术也是多种多样，而可以虚拟的层次或者可虚拟的方面也是遍布从硬件到应用层整个计算机系统。

因此应该注意到虚拟化和虚拟机指的并不是同一个概念，虚拟化是一个为了简化管理，优化资源的解决方案，而虚拟机简单的可以认为使这个解决方案的具体实现。

虚拟化分类虚拟化可以分为对硬件的虚拟和对操作系统或者对软件的虚拟。

硬件层面的虚拟化从这个层面来讲，有三种不同的技术：•Full Virtualization（全虚拟化），几乎是完整地模拟一套真实的硬件设备。

大部分操作系统无须进行任何修改即可直接运行在全虚拟化环境中。

像kvm等技术是全虚拟化。

•Partial Virtualization（部分虚拟化），仅仅提供了对关键性计算组件或者指令集的模拟。

操作系统可能需要做某些修改才能够运行在部分虚拟化环境中。

•Paravirtualization（半虚拟化），不对硬件设备进行模拟，虚拟机拥有独立的运行环境，通过虚拟机管理程序共享底层的硬件资源。

大部分操作系统需要进行修改才能够运行在半虚拟化环境中。

它的性能要稍微高于全虚拟化。

像Xen。

因为需要改动托管系统的内核，所以xen是不支持win虚拟机的。

另外还有像硬件辅助虚拟化，就是宿主机的硬件架构在一定程度上提供对虚拟化的支持。

像Intel-VT(Intel Virtualization Technology)与AMD-V(AMD Virtualization)都提供了这等架构支持。

软件层面的虚拟化往往是指在同一个操作系统实例的基础上提供多个隔离的虚拟运行环境，也常常被称为容器技术。

LXC（Linux Container）采用了这种技术，它主要是采用了linux本身提供的技术，在一定程度上模拟虚拟化。

qemu的热迁移功能的函数流程详解 -回复

qemu的热迁移功能的函数流程详解-回复QEMU是一个开源的虚拟化软件，具有热迁移（live migration）功能，它允许在不中断虚拟机运行的情况下，将运行中的虚拟机迁移到另一个物理机上。

这篇文章将详细介绍QEMU热迁移功能的函数流程。

1. 获取目标主机信息在QEMU热迁移过程中，首先需要获取目标主机的信息。

这包括目标主机的IP地址、存储目录等等。

一般可以通过配置文件或者命令行参数来指定目标主机的信息。

2. 准备迁移数据在进行热迁移之前，需要将虚拟机的运行状态和内存数据保存到磁盘上，以便在目标主机上恢复虚拟机的状态。

QEMU使用了两个函数来完成迁移数据的准备：(a) migrate(): 这个函数用于向目标主机发送准备迁移的请求。

发送请求后，QEMU将进入等待状态，直到接收到目标主机的准备迁移回复。

(b) qemu_savevm_state_complete(): 这个函数用于保存虚拟机的状态和内存数据。

它会生成一个快照文件，包含虚拟机的寄存器状态、设备状态和内存数据。

3. 传输迁移数据一旦目标主机准备好接收迁移数据，QEMU就会通过网络将数据传输到目标主机。

这个过程涉及到两个函数：(a) migrate_send(): 这个函数用于将迁移数据发送到目标主机。

数据可以是虚拟机的内存数据、设备状态等等。

(b) migrate_receive(): 这个函数用于接收来自源主机的迁移数据。

目标主机会不断调用这个函数来接收数据，直到接收完所有的数据。

在数据传输过程中，源主机和目标主机会保持TCP连接，以确保数据的可靠性和完整性。

同时，数据压缩和加密的功能也可以在这个阶段使用。

4. 状态同步在数据传输完成后，源主机和目标主机需要同步它们的状态。

具体来说，这包括虚拟机的寄存器状态、设备状态等等。

QEMU使用两个函数来完成状态同步：(a) migrate_start_postcopy(): 这个函数用于在目标主机上启动虚拟机。