HOMEWORK NO5
homework5
任务型阅读请认真阅读下列短文，并根据所读内容在文章后表格中的空格里填入一个最恰当的单词。
注意：每个空格只填一个单词。
As soon as the weather gets warmer, charities start to ask for money. If you are also trying to raise money for a charity, you can make use of the following tips and tricks to help you.Parties are great ways to raise money for charity. If you have a party with a theme that has something to do with your charity, that’s even better. For example, you can have a pink drink party to raise money for breast cancer research. At a party like this, every drink you make would be pink, so you could pink lemonade drinks and serve red wine. Tell your guests to be dressed in pink to keep the fun going. If you are raising money for another cause (事业) with a meaningful color, make drinks with those colors. And remember, when you send out your invitations, ask for a specific donation. When people come, they’ll give you money and you’ll be much closer to your goal.Selling cookies or any other baked food is another wonderful way to raise money. You can make cookies cut out to look like ribbons (绶带) and paint them the color of your cause. Wrap them individually and set them out in your office for people to buy. This is not only a great way to make money, but also a great way to let people know you are taking part in a charity event.If cookies are not your thing, ribbons are another great way to spread the word about your event. Make fun ribbons inexpensively and hand them out with note cards which show in detail how people can donate to you. All you need are a few spools (线轴) of fun ribbon in your cause’s color, some hot glues and safety pins (别针). Cut the ribbon, glue it together, and put a pin on the back. Easy and cheap!In the age of the Internet, having a website is also a perfect way to tell your story and give details to people about how to donate. If you’re taking part in a charity event for a specific reason — maybe you suffered from a disease yourself, or maybe you know someone who has been ill, then a webpage with pictures and stories can help your fr iends and family see just how important this charity is to you, and they’ll then be more likely to donate to your cause.单词拼写：1. Can you take out the ___________ when you go off to work? (垃圾)2. Such ____________ is unacceptable in public. (行为)3. Various ______________ for these changes in climate have been offered by scientists all over the world. (解释)4. In the final ______________, Harry expressed his love to Julia. (场景)5. Teachers in this school are given complete _______ in their choice of teaching materials. (自由)6. I think we all learned a _____________ lesson today. (宝贵的)7. After a brief __________ of silence, the students started their discussion. (时期、时段)8. She drew back the _________ to let in the light, and then sat down to enjoy a cup of tea. (窗帘)9. Students at our school generally have the highest test __________ in the city. (分数)10. In this country, women are ______________ to enter the temple. (禁止)1. garbage2. behaviour3. explanations4. scene5. freedom6. valuable7. period8. curtains9. scores 10. forbidden参考答案：51. linked/related 52. wear 53. base 54. invite 55. shapes56. sell 57. ways 58. materials 59. Have/Design/Build/Create/Make/Develop 60. importance。
人教版必修二 Unit5 Homework课后作业
必修二Unit5 Homework1一．填写单词。
1. Though he ___________ to the meeting, he refused the _____________ because he was opposed to the programme. (invite)2 Some famous _________ will give __________ at the concert this evening. (perform)3. He ___________ himself to the protection of rare animals for years and his ___________ will arouse p eople’s awareness of wildl ife protection (devote)4. The little boy is a little too shy and his mother encourages him to have more ____________ (confident) in himself5. The __________ and pre tty woman __________ people’s attention wherever she goes. (attract)6. He decided to ___________ more money to raise his family. (赚钱)7. Police asked the ________________ if they had seen the accident. (路人)8. Breakfast is provided at no _____________ (收费、要价).9. Most pupils learn to play a musical __________________ (乐器).10. I have no c_____________ on me. May I pay by credit card(信用卡)二，七选五（共5小题；每小题2分，满分10分）根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。
家庭在下午5点的活动英语作文
家庭在下午5点的活动英语作文At 5 pm, the house comes alive with the sounds of daily activities. The kids are usually done with school and are busy with their homework. You can hear the scratch ofpencils on paper and the occasional groan when a math problem gets too tricky. Mom is in the kitchen, chopping vegetables for dinner and humming a tune she heard on the radio.Out in the backyard, Dad is setting up the barbecue, grilling some hamburgers and hot dogs. The smell of smoke and meat fills the air, making everyone's stomach rumble. The dogs are barking excitedly, sensing that dinner is near.Inside, the TV is on, but no one's really paying attention. It's more of a background noise, something tofill the silence between conversations. The younger kid comes in from playing outside, his face red and sweaty, and announces that he's hungry. Mom calls out, asking if anyone wants to help set the table.The atmosphere is relaxed yet busy, everyone focused on their own tasks but also aware of each other's presence.It's a typical weekday evening in this family, filled with the simple joys of home and family. As the sun starts to set, the house warms up with the promise of a delicious meal and the companionship of loved ones.。
【教育资料】人教版必修二 Unit5 Homework课后作业学习精品
必修二Unit5 Homework1一．填写单词。
1. Though he ___________ to the meeting, he refused the _____________ because he was opposed to the programme. (invite)2 Some famous _________ will give __________ at the concert this evening. (perform)3. He ___________ himself to the protection of rare animals for years and his ___________ will arouse people’s awareness of wildlife protection (devote)4. The little boy is a little too shy and his mother encourages him to have more ____________ (confident) in himself5. The __________ and pretty woman __________ people’s attention wherever she goes. (attract)6. He decided to ___________ more money to raise his family. (赚钱)7. Police asked the ________________ if they had seen the accident. (路人)8. Breakfast is provided at no _____________ (收费、要价).9. Most pupils learn to play a musical __________________ (乐器).10. I have no c_____________ on me. May I pay by credit card(信用卡)二，七选五（共5小题；每小题2分，满分10分）根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。
以homework为题的英语作文5句话
以homework为题的英语作文5句话Here is an English essay with the topic "Homework" that is over 1000 words long, without a title and without any extra punctuation marks in the body of the text.Homework is an essential part of the educational process for students of all ages. It provides an opportunity for students to reinforce the concepts they have learned in the classroom and to develop important skills such as time management, organization, and independent learning. However, the role of homework in education has been the subject of much debate, with some arguing that it is an unnecessary burden on students, while others believe it is a vital component of a well-rounded education.One of the primary benefits of homework is that it allows students to practice and apply the skills they have learned in the classroom. By completing assignments and exercises outside of class, students can deepen their understanding of the material and identify areas where they need additional support. This can be particularly important in subjects like mathematics, where regular practice is essential for developing proficiency.Furthermore, homework can help students develop important study habits and time management skills. When students are required to complete assignments on their own time, they must learn to prioritize their work, manage their schedules, and develop strategies for staying organized. These skills are not only valuable in the classroom but also in the workplace and in everyday life.Another important aspect of homework is that it can foster a sense of independence and responsibility in students. By requiring students to take an active role in their own learning, homework encourages them to develop a sense of ownership over their education and to take responsibility for their own progress. This can be particularly important for older students who are preparing to transition to college or the workforce, where they will be expected to work independently and take initiative.However, the role of homework in education has also been the subject of much debate, with some arguing that it can be an unnecessary burden on students. Critics of homework argue that it can lead to stress and anxiety, particularly for students who are already struggling with academic demands. They also argue that homework can limit the time that students have for other important activities, such as extracurricular pursuits, family time, and leisure activities.In response to these concerns, some schools and districts have implemented policies that limit the amount of homework that can be assigned to students. For example, some schools have adopted a "no homework on weekends" policy, while others have implemented a "flipped classroom" model, where students are expected to engage with course material at home and then use class time for hands-on activities and discussions.Despite these concerns, however, there is a growing body of research that suggests that homework can have a positive impact on student learning and achievement. Studies have shown that students who complete homework assignments tend to perform better on standardized tests and have higher overall academic achievement than those who do not. Additionally, research has suggested that the quality and relevance of homework assignments can be more important than the quantity, and that well-designed homework can help to reinforce and deepen students' understanding of the material.Ultimately, the role of homework in education is a complex and nuanced issue, and there is no one-size-fits-all solution. While some students may benefit from more homework, others may struggle with the demands it places on their time and energy. As educators and policymakers continue to grapple with this issue, it is important to consider the individual needs and circumstances of students and to develop homework policies that strike a balance betweenacademic rigor and student well-being.In conclusion, homework is an important component of a well-rounded education, providing students with opportunities to practice and apply the skills they have learned in the classroom. However, the role of homework in education is a complex and nuanced issue, and it is important to consider the individual needs and circumstances of students when developing homework policies. By striking a balance between academic rigor and student well-being, educators can help to ensure that homework remains a valuable and effective tool for student learning and development.。
2019-2020学年闽教版六年级上册英语Unit 5《Housework》(Part A)公开课课件
homework
（家庭作业）
do my homework
housework
（家务事）
do some housework
h ou sew or k
Do you often do some housework ?
I often
.
make the bed pick up the toys
clean socks dirty socks
(那些)
Ben’s socks
Whose T-shirt is this? I think it’s Wang Tao’s.
this 这
Whose dog is that?
I think it’s Sally’s.
that 那
Whose toys are these? I think they are Kate’s.
B :Yes , Mom.
M : Kate . Are those your toys ?
K : Yes , they are .
M : Put them in the box .
K : All
right .
1、Recite Part A , 2、Finish 《Activity Book》U5 PA .
these 这些
thi 那些
Q 1 : What does Mom want Ben to do ?
Put them in the washing machine .
the dirty socks
washing machine
Put them in the washing machine.
Homework 5(参考译文)
• 7. 艰苦奋斗的精神要贯彻始终。 • The spirit of plain living and hard struggle must be carried through. • 参考译文:………must be promoted / fostered. • 8. 你放心，我死也不会说出去的。 • Set your heat at rest. I won't tell anybody even if I died. • 参考译文:I would die before I…
• 2. 我们要把改革开放提高到一个新水平。 • We must raise our reform and opening up policy to a new level. • 参考译文: We must do better / do a better job in reform and opening up. • We must step up our efforts to … • We should open the country wider and strive for fuller implementation of thee …
• 3. 她有好几分钟说不话出来。 • She could not say any words for several minutes. • 参考译文:She was speechless for… • Several minutes passed before she found her tongue again.
II. Translate the following sentences into English. Pay attention to the words in bold.
Homework 5
Unit 5Nelson Mandela—a modern heroPart 1Ⅰ.重点单词聚焦1．The school used advanced teaching methods to________(教育) the students.2．In my________(看法)，many teenagers depend too much on their parents.3．Anyone that provides valuable information for the police will be________(奖赏)．4．His sister ran away from home and went abroad because of family________(暴力)．5．This kind of washing powder is of good________(质量)，and doesn’t harm our hands. 6．The boss was________(抨击) by the newspapers for not caring for the workers.7．—Do you know when the People’s Republic of China was________(成立)?—On October 1,1949.8．Yesterday we________(选举) Mr Li the best teacher in our school.9．Though he________(逃跑) from the big fire，his skin was severely burned.10．Your teacher can give you________(指导) on choosing a career and writing a job application. Ⅱ.重点短语扫描1．of work失业2． a matter of fact 事实上3．come to 当权；上台4．turn 求助于；致力于5．be to 被判处……(徒刑) 6．worry 担心7．in 信仰，信任8．in 处于麻烦中，处于困境中9．lose 丧失勇气或信心10．up 设立；建立11．put...in 把……投入监狱12．fight 反对……而斗争Ⅲ.课文原句突破1．但是，那个时候你要想住在约翰内斯堡就非得要有身份证不可。
写作业不认真的英语
写作业不认真的英语Certainly! Here's a lesson plan for a class on "Not Taking Homework Seriously":LessonObjective: To understand the significance of completing homework diligently and the consequences of not doing so.Materials Needed:- Whiteboard and markers- Handouts with examples of good and poor homework- Interactive quiz on the importance of homeworkLesson Plan:1. Introduction (5 minutes)- Start the class with a short discussion: "Why do you think homework is assigned?"- Write down students' responses on the board.2. Lecture (10 minutes)- Explain the purpose of homework:- Reinforcement of class concepts- Development of study skills- Preparation for future lessons- Discuss the benefits of completing homework:- Improved grades- Better understanding of the subject- Time management skills3. Examples (10 minutes)- Distribute handouts with examples of well-done and poorly done homework.- Discuss what makes each example good or bad.4. Interactive Quiz (10 minutes)- Use an interactive quiz to check students' understanding of the importance of homework.- Include questions like:- What is the main purpose of homework?- Why is it important to complete homework on time?- What are some consequences of not taking homework seriously?5. Group Activity (15 minutes)- Divide the class into small groups.- Each group is given a scenario where a student is not taking homework seriously.- The group must discuss the possible outcomes and suggest solutions.6. Reflection (5 minutes)- Ask students to reflect on their own homework habits.- Encourage them to share their thoughts on how they can improve.7. Conclusion (5 minutes)- Summarize the key points discussed in the lesson.- Reiterate the importance of taking homework seriouslyfor academic success.8. Assignment (Homework)- Assign a short essay on "My Commitment to Homework" where students outline their plan to improve their homework habits.Assessment:- Participation in the group activity- Completion of the interactive quiz- Submission of the essay on homework commitmentDifferentiation:- Provide additional support to students who struggle with time management by giving them a template for a homework schedule.- Challenge advanced students to create a presentation on the benefits of homework for the next class.This lesson plan is designed to engage students in understanding the value of homework and to encourage them to take it more seriously.。
Homework5
Homework5 Q:Solution:a. Let F(a,b,c)= w i y i−a(x i−b)c 2ni=1.In order to find a,b,c adapt to minimize F. We can find the derivatives of F.ðF ða =2⋅ w i y i−ax i−b−1x i−bni=1ni=1=0ðFða=-2[w i y i(x i−b)cni=1]−a[1(x i−b)2cni=1]Thus, we can get the aa=[w i y i(x i−b)c ni=1][1(x i−b)2c ni=1]ðF ðb =2[w i y i−ax i−b C−ac(x i−b)c+1ni=1] ni=1=0ðFðb =2c [a 2 x i −b 2c +1−a w i y i (x i −b )c +1]ni =1=0 [a x i −b −w i y i(x i−b )]n i =1=0 Put a into this equation, we can get[w i y i (x i −b )cn i =1][1(x i−b )2c i =1][a x i −b]n i =1− [w i y i (x i −b )]n i =1=0So we can get the nonlinear equation[w i y i (x i −b )n i =1] [a x i −b]ni =1- [1(x i −b )ni =1] [w i y i (x i −b )]ni =1=0We can also get the third equation like this[w i y i (x i −b )c n i =1] [ln (x i −b )(x i −b )2c n i =1]- [w i y i −ln (x i −b )(x i −b )2c n i =1] [1(x i−b )2c ni =1] b. For this equation and the two nonlinear equations, we can define six variables to replace these complex polynomials1、t1=0()ni i c i i w y x b =-∑, t2=201()n c i i x b =-∑, t3=2111()n c i ix b +=-∑, t4=11()ni i c i i w y x b +=-∑, t5=21ln()()n i c i i x b x b =--∑, t6=1ln()()ni i i ci i w y x b x b =--∑ So these equations can be written asa=t1/t2;0=t1*t3-t2*t4; 0=t1*t5-t2*t6;As for this problem, the Jacobi Matrix is 2X2. It’s difficult to find the derivative of these formulas in MATLAB, so we can code them up directly. For example, for t1, we use these codes:function [t1,dbt1,dct1]=fun1(b,c,x,y,w) t1=0;dbt1=0;dct1=0; n=size(x,2); for i=1:nt1=t1+w(i)*y(i)/(x(i)-b)^c;dbt1=dbt1+c*(w(i)*y(i))/(x(i)-b)^(c+1); dct1=dct1-(w(i)*y(i)*log(x(i)-b))/(x(i)-b)^c; endt1 is the equation, dbt1 is ∂f∂b , dct1 is ∂f∂c . So it’s convenient to calculate for the Jacobi Matrix. The others can be written as:function [t2,dbt2,dct2]=fun2(b,c,x) t2=0;dbt2=0;dct2=0; n=size(x,2);for i=1:nt2=t2+1/(x(i)-b)^(2*c);dbt2=dbt2+2*c/(x(i)-b)^(2*c+1);dct2=dct2-(2*log(x(i)-b))/(x(i)-b)^(2*c);endfunction [t3,dbt3,dct3]=fun3(b,c,x)t3=0;dbt3=0;dct3=0;n=size(x,2);for i=1:nt3=t3+1/(x(i)-b)^(2*c+1);dbt3=dbt3+(2*c+1)/(x(i)-b)^(2*c+2);dct3=dct3-2*log(x(i)-b)/(x(i)-b)^(2*c+1);endfunction [t4,dbt4,dct4]=fun4(b,c,x,y,w)t4=0;dbt4=0;dct4=0;n=size(x,2);for i=1:nt4=t4+(w(i)*y(i))/(x(i)-b)^(c+1);dbt4=dbt4+(c+1)*w(i)*y(i)/(x(i)-b)^(c+2);dct4=dct4-log(x(i)-b)*w(i)*y(i)/(x(i)-b)^(c+1);endfunction [t5, dbt5, dct5]=fun5(b,c,x)t5=0;dbt5=0;dct5=0;n=size(x,2);for i=1:nt5=t5+log(x(i)-b)/(x(i)-b)^(2*c);dbt5=dbt5+(2*c*log(x(i)-b)-1)/(x(i)-b)^(2*c+1);dct5=dct5-2*log(x(i)-b)^2/(x(i)-b)^(2*c);endfunction [t6, dbt6, dct6]=fun6(b,c,x, y, w)t6=0;dbt6=0;dct6=0;n=size(x,2);for i=1:nt6=t6+(log(x(i)-b)*w(i)*y(i))/(x(i)-b)^c;dbt6=dbt6+w(i)*y(i)*(c*log(x(i)-b)-1)/(x(i)-b)^(c+1); dct6=dct6-w(i)*y(i)*log(x(i)-b)^2/(x(i)-b)^c;endSo the Jacobi Matrix can be written as:J(1,1)=dbt1*t3+t1*dbt3-dbt4*t2-t4*dbt2;J(1,2)=dct1*t3+t1*dct3-dct4*t2-t4*dct2;J(2,1)=dbt1*t5+t1*dbt5-dbt6*t2-t6*dbt2;J(2,2)=dct1*t5+t1*dct5-dct6*t2-t6*dct2;AndF(1,1)=t1*t3-t4*t2;F(2,1)=t1*t5-t6*t2;So the Jacobi Matrix codes are:function [F,J]=realfun(b,c,x,y,w)F=zeros(2,1);J=zeros(2,2);[t1, dbt1, dct1]=fun1(b,c,x, y,w);[t2, dbt2, dct2]=fun2(b,c, x);[t3, dbt3, dct3]=fun3(b,c, x);[t4, dbt4, dct4]=fun4(b,c,x, y,w);[t5, dbt5, dct5]=fun5(b,c,x);[t6, dbt6, dct6]=fun6(b,c,x, y, w);F(1,1)=t1*t3-t4*t2;F(2,1)=t1*t5-t6*t2;J(1,1)=dbt1*t3+t1*dbt3-dbt4*t2-t4*dbt2;J(1,2)=dct1*t3+t1*dct3-dct4*t2-t4*dct2;J(2,1)=dbt1*t5+t1*dbt5-dbt6*t2-t6*dbt2;J(2,2)=dct1*t5+t1*dct5-dct6*t2-t6*dct2;Then we can start solving our problem1 Newton’s methodfunction [a,b,c,k,accuracy]=zqhnew(x,y,b,c,N,TOL)w=log(y);k=1;while k<N[F,J]=realfun(b,c,x,y,w);h=J\(-F);b1=b+h(1,1);c1=c+h(2,1);accuracy=norm(c1-c,inf);if norm([b1-b c1-c],2)<TOLfprintf('The procedure was successful after %d iterations',k);bcaccuracy[t1, dbt1, dct1]=fun1(b,c,x, y,w);[t2, dbt2, dct2]=fun2(b,c, x);a=t1/t2;returnelseb=b1; c=c1;k=k+1;endendfprintf('Method failed after %d iterations',N);end>> y=[2.4 3.8 4.75 21.60];>> x=[31.8 31.5 31.2 30.2];>> b=30;>> c=2;>> N=100;>> TOL=10^-5;>> zqhnew(x,y,b,c,N,TOL)The procedure was successful after 7 iterations b =26.7702c =8.4518accuracy =9.8830e-07ans =2.2179e+062 Quasi-Newton’s methodfunction [a,b,c,k,accuracy]=zqhquasi(x,y,b,c,N,TOL)w=log(y);k=1;[F0,J0]=realfun(b,c,x,y,w);A0=J0;X0=[b;c];X1=X0-J0\(F0);while k<Nb1=X1(1,1);c1=X1(2,1);b0=X0(1,1);c0=X0(2,1);[F1,J1]=realfun(b1,c1,x,y,w);[F0,J0]=realfun(b0,c0,x,y,w);S=X1-X0;Y=F1-F0;A1=A0+(Y-A0*S)*S'/((S(1,1))^2+(S(2,1))^2);X2=X1-A1\F1;accuracy=norm(S,2);if norm(S,2)<TOLfprintf('The procedure was successful after %d iterations',k); b=X1(1,1)c=X1(2,1)accuracy[t1, dbt1, dct1]=fun1(b,c,x, y,w);[t2, dbt2, dct2]=fun2(b,c, x);a=t1/t2;returnelseX0=X1;A0=A1;X1=X2;k=k+1;endendfprintf('Method failed after %d iterations',N);end>> y=[2.4 3.8 4.75 21.60];>> x=[31.8 31.5 31.2 30.2];>> b=26;>> c=8;>> N=100;>> TOL=10^-5;>> zqhquasi(x,y,b,c,N,TOL)The procedure was successful after 23 iterationsb =25.9848c =10.1123 accuracy =6.2590e-06 ans =1.3812e+083 Method of Steep Decentfunction [a,b,c,k,g1,accuracy]=zqhsteep(x,y,b,c,N,TOL) w=log(y);k=1;while k<N[F,J]=realfun(b,c,x,y,w);g1=F(1,1)^2+F(2,1)^2;Z=2*J'*F;z0=norm(Z,2);if z0==0disp('Zero gradient');k;b;c;g1;[t1, dbt1, dct1]=fun1(b,c,x, y,w);[t2, dbt2, dct2]=fun2(b,c, x);a=t1/t2;break;endZ=Z/z0;alpha1=0;alpha3=1;b1=b-alpha3*Z(1,1);c1=c-alpha3*Z(2,1);[F,J]=realfun(b1,c1,x,y,w);g3=F(1,1)^2+F(2,1)^2;while g3>=g1alpha3=alpha3/2;b3=b-alpha3*Z(1,1);c3=c-alpha3*Z(2,1);[F,J]=realfun(b3,c3,x,y,w);g3=F(1,1)^2+F(2,1)^2;if alpha3<TOL/2disp('NO likely improvement');k;b;c;g1;[t1, dbt1, dct1]=fun1(b,c,x, y,w);[t2, dbt2, dct2]=fun2(b,c, x);a=t1/t2;break;endendalpha2=alpha3/2;b2=b-alpha2*Z(1,1);c2=c-alpha2*Z(2,1);[F,J]=realfun(b2,c2,x,y,w);g2=F(1,1)^2+F(2,1)^2;h1=(g2-g1)/alpha2;h2=(g3-g2)/(alpha3-alpha2);h3=(h2-h1)/alpha3;alpha0=0.5*(alpha2-h1/h3);b0=b-alpha0*Z(1,1);c0=c-alpha0*Z(2,1);[F,J]=realfun(b0,c0,x,y,w);g0=F(1,1)^2+F(2,1)^2;g=g0;bx=b0;cx=c0;accuracy=norm(g-g1);if norm(g-g1,inf)<TOLfprintf('The procedure was successful after %d iterations',k);b=bxc=cxaccuracy[t1, dbt1, dct1]=fun1(b,c,x, y,w);[t2, dbt2, dct2]=fun2(b,c, x);a=t1/t2;break;endb=bx;c=cx;k=k+1;end>> y=[2.4 3.8 4.75 21.60];x=[31.8 31.5 31.2 30.2];b=30;c=2;N=100;TOL=10^-5;>> zqhsteep(x,y,b,c,N,TOL)The procedure was successful after 5 iterationsb =27.0259c =3.8817accuracy =6.3440e-08 ans =5.0855e+034 Broyden Methodfunction [a,b,c,k,accuracy]=zqhbro(x,y,b,c,N,TOL)w=log(y);k=2;[F0,J0]=realfun(b,c,x,y,w);A0=J0;V=F0;A=inv(A0);s=-A*V;b1=b+s(1,1);c1=c+s(2,1);while k<NQ=V;[F1,J1]=realfun(b1,c1,x,y,w);V=F1;P=V-Q;z=-A*P;p=-s'*z;u=s'*A;A=A+1/p*(s+z)*u;s=-A*V;b2=b1+s(1,1);c2=c1+s(2,1);accuracy=norm(c2-c1,inf);if norm([b2-b1 c2-c1],2)<TOLfprintf('The procedure was successful after %d iterations',k); b=b1c=c1accuracy[t1, dbt1, dct1]=fun1(b,c,x, y,w);[t2, dbt2, dct2]=fun2(b,c, x);a=t1/t2;returnelseb1=b2; c1=c2;k=k+1;endendfprintf('Method failed after %d iterations',N);end>> y=[2.4 3.8 4.75 21.60];x=[31.8 31.5 31.2 30.2];b=30;c=2;N=100;TOL=10^-5;zqhbro(x,y,b,c,N,TOL)The procedure was successful after 11 iterations b =25.9848c =10.1123accuracy =6.2579e-06ans =1.3812e+085MATLAB Built-in Functions(1) fminuncfunction zqhmm2ini_BC=[30;2];options=optimset('Display','iter','Tolfun',10^-7);[opt_BC]=fminunc(@f,ini_BC,options)function [fmin]=f(BC)x=[31.8 31.5 31.2 30.2];y=[2.4 3.8 4.75 21.60];w=log(y);[t1, t1db, t1dc]=fun1(BC(1,1),BC(2,1),x, y,w);[t2, t2db, t2dc]=fun2(BC(1,1),BC(2,1), x);a=t1/t2;fmin=0;for i=1:4fmin=fmin+(w(i)*y(i)-a/(x(i)-BC(1,1))^BC(2,1))^2;end>> zqhmm2警告: Gradient must be provided for trust-region algorithm;using line-search algorithm instead.> In fminunc at 382In zqhmm2 at 4First-order Iteration Func-count f(x) Step-size optimality0 3 959.142 7741 6 87.3578 0.0012913 2902 9 18.1283 1 1063 12 2.7427 1 35.94 15 1.44396 1 13.45 18 1.24402 1 0.8796 21 1.24319 1 0.3327 24 1.24292 1 0.3988 27 1.24066 1 0.7659 30 1.23626 1 1.6510 33 1.22349 1 3.1511 36 1.19264 1 4.9312 39 1.11908 1 6.2413 42 0.989803 1 5.5214 45 0.877007 1 3.6415 48 0.820879 1 2.2516 51 0.796293 1 1.3517 54 0.787799 1 0.81918 57 0.78564 1 0.53719 60 0.7851 1 0.403First-order Iteration Func-count f(x) Step-size optimality20 63 0.78467 1 0.321 66 0.783874 1 0.13822 69 0.78291 1 0.039423 72 0.782308 1 0.11124 75 0.782129 1 0.042125 78 0.782114 1 0.00099326 81 0.782114 1 4.51e-06 Local minimum found.Optimization completed because the size of the gradient is less thanthe selected value of the function tolerance.<stopping criteria details>opt_BC =26.76988.4526(2)fminsearchfunction zqhmmini_BC=[30;2];options=optimset('Display','iter','Tolfun',10^-7);[opt_BC]=fminsearch(@f,ini_BC,options)function [fmin]=f(BC)x=[31.8 31.5 31.2 30.2];y=[2.4 3.8 4.75 21.60];w=log(y);[t1, t1db, t1dc]=fun1(BC(1,1),BC(2,1),x, y,w);[t2, t2db, t2dc]=fun2(BC(1,1),BC(2,1), x);a=t1/t2;fmin=0;for i=1:4fmin=fmin+(w(i)*y(i)-a/(x(i)-BC(1,1))^BC(2,1))^2;end>> zqhmmIteration Func-count min f(x) Procedure0 1 959.1421 3 75.9237 initial simplex2 5 52.7606 reflect3 7 52.7606 contract inside4 8 52.7606 reflect5 10 15.4821 contract inside6 12 7.21226 contract inside7 14 7.21226 contract outside8 16 2.54277 contract inside9 17 2.54277 reflect10 19 2.54277 contract inside11 21 2.3962 contract inside12 23 2.21803 contract inside13 24 2.21803 reflect14 26 2.20942 contract inside15 28 2.19528 contract inside16 30 2.19326 reflect17 32 2.17331 reflect18 33 2.17331 reflect19 35 2.15207 reflect20 37 2.15207 contract inside21 39 2.1336 expand22 41 2.09239 expand23 42 2.09239 reflect24 44 2.00384 expand25 45 2.00384 reflect26 47 1.92683 expand27 49 1.78149 expand28 51 1.66771 expand29 53 1.38399 expand30 54 1.38399 reflect31 56 1.16901 expand32 58 1.00934 expand33 60 0.966224 reflect34 62 0.845423 expand35 64 0.82419 reflect36 66 0.806987 reflect37 68 0.792371 reflect38 69 0.792371 reflect39 71 0.79232 reflect40 73 0.783986 contract inside41 75 0.783986 contract inside42 76 0.783986 reflect43 78 0.782529 contract inside44 80 0.782529 contract inside45 81 0.782529 reflect46 83 0.782153 contract inside47 85 0.782153 contract inside48 87 0.782153 contract inside49 89 0.782138 contract inside50 91 0.782137 contract inside51 93 0.782116 contract inside52 95 0.782116 contract inside53 96 0.782116 reflect54 98 0.782115 contract inside55 100 0.782115 contract inside56 102 0.782114 contract inside57 104 0.782114 contract inside58 106 0.782114 contract inside59 107 0.782114 reflect60 109 0.782114 contract inside61 111 0.782114 contract inside62 113 0.782114 contract inside63 115 0.782114 contract inside64 117 0.782114 contract inside65 118 0.782114 reflect66 120 0.782114 contract inside67 122 0.782114 contract inside68 124 0.782114 contract inside69 125 0.782114 reflect70 127 0.782114 contract inside71 129 0.782114 contract outside72 131 0.782114 contract inside优化已终止:当前的x 满足使用1.000000e-04 的OPTIONS.TolX 的终止条件，F(X) 满足使用1.000000e-07 的OPTIONS.TolFun 的收敛条件opt_BC =26.77028.4519SummaryWe can use this equation to calculate for the rate of convergence:C=ln e k+1e k /ln e ke k−1.The codes are:[m,n]=size(t);for i=1:n-1E(i) =norm(t(i)-t(n), inf);endfor j=1:n-3ratew(j)=log(E(j+2)/E(j+1))/log(E(j+1)/E(j)); endS o we can conclude that the functions in MATLAB are the more stable among these methods, they always can get the answers. The Broyden can also get answer but sometimes the results seem not accurate. Other methods require accurate initial guess. Newton’s and Quasi-Newton’s converge fast if they’re converge, but require accurate initial guess.Steepest descent method usually converge and converge fast.Broyden method also calls for an accurate initial guess.So I think for some unknown conditions, especially for my major, the Geophysics, has many nonlinear problems just like the inversion. So we must learn to how to cope with the numerous data, and select the best way to process these data.。
请大家不要再写作业了英语
请大家不要再写作业了英语Dear students,I understand that homework is an essential part of your learning process, but sometimes, it's necessary to take a step back and reassess our approach to education. Here's why I'm asking you to stop doing your homework in English:1. Overload of Information: Constantly writing assignments can lead to an overload of information, which might hinder your ability to process and retain what you've learned.2. Quality Over Quantity: Focusing on the quality of your learning rather than the quantity of work done can lead to better understanding and retention.3. Time for Reflection: Taking a break from homework allows you to reflect on what you've learned and how you can applyit in different contexts.4. Balanced Life: It's important to maintain a balanced life. Too much focus on homework can take away from other important aspects like family, hobbies, and self-care.5. Cultivating Curiosity: Encouraging curiosity and a lovefor learning is more beneficial in the long run than forcing homework.6. Self-Paced Learning: Everyone learns at their own pace. Taking a break from homework can help you learn at a pacethat suits you best.7. Encouraging Creativity: Sometimes, stepping away from structured assignments can spark creativity and lead to innovative ways of understanding concepts.8. Promoting Active Learning: Engaging in discussions, debates, and interactive activities can be more effective than passive homework assignments.9. Reducing Stress: Homework can be a source of stress for many students. Reducing or eliminating it can contribute to a healthier learning environment.10. Fostering Independence: By not relying on homework, students can develop the skills to learn independently and take responsibility for their own education.Remember, this is not about avoiding responsibility or shirking your duties as students. It's about finding a more effective and sustainable way to learn English that respects your time, your well-being, and your unique learning style.Let's work together to find alternative methods of learning that are engaging, enjoyable, and effective.Best regards,[Your English Teacher]。
我五点半回家写作业英语
我五点半回家写作业英语Certainly! Here's a short passage that fits the title "I Go Home at 5:30 PM to Do My Homework":After a long day at school, I always look forward to the end of the day when I can finally return home. At 5:30 PM sharp, I leave the school gates and head straight for my house. The walk home is a peaceful one, allowing me to unwind and prepare myself mentally for the tasks ahead.Once I arrive, I immediately go to my room and start unpacking my school bag. I take out all the textbooks and notebooks that I need for my homework. I have a specific routine that I follow to ensure I am organized and efficient. First, I make a list of all the assignments that are due the next day. This helps me prioritize and manage my time effectively.I then tackle the most challenging subjects first. This strategy works well for me because I am still fresh and my mind is sharp after school. If I encounter any difficulties, I make a note of them to ask my teacher the next day or to seek help from my classmates.After completing the more demanding tasks, I move on to the easier ones. This way, I can finish my homework with a senseof accomplishment and without feeling overwhelmed. I alsomake sure to take short breaks in between to avoid burnout.Once all my homework is done, I review the material brieflyto reinforce what I've learned. This helps me retain the information better and prepares me for any upcoming tests or quizzes.By the time I finish my homework, it's usually around 7:30 PM.I then take a break to have dinner with my family, which is a great way to relax and share stories from the day. After dinner, I have some free time to pursue my hobbies or just relax before going to bed.This routine has been instrumental in helping me balance my schoolwork and personal life. It's important to me tomaintain a healthy balance, as it contributes to my overall well-being and academic success.This passage provides a detailed description of a student's after-school routine, focusing on the process of going home and doing homework efficiently and effectively.。
我五点半回家写作业英语
I usually return home around fivethirty in the evening to start my homework.Once I get home,I first take a few minutes to relax and refresh myself after a long day at school. Then,I prepare a quiet and comfortable space where I can focus on my studies.I begin by reviewing the assignments I have for the day.I make a list of all the subjects and tasks that need to be completed,including any reading,writing,or problemsolving. This helps me to organize my time and prioritize my work.Next,I allocate a specific amount of time for each subject.For example,I might spend an hour on math problems,followed by45minutes on English literature,and then another hour on science experiments.I try to break up the more challenging or timeconsuming tasks with shorter,easier assignments to keep my energy levels up.While working on my homework,I make sure to take short breaks every30to45minutes. During these breaks,I might grab a snack,stretch,or do a quick physical activity to help clear my mind and prevent burnout.If I encounter any difficulties or questions while doing my homework,I make a note of them and either try to find the answer myself using textbooks or online resources,or I prepare to ask my teacher or classmates for help the next day at school.Once I have finished all my assignments,I review my work to check for any mistakes or areas that need improvement.I also make sure to pack my school bag with all the necessary materials for the next day,including textbooks,notebooks,and any completed homework that needs to be handed in.Finally,after completing my homework,I take some time to unwind and engage in leisure activities that I enjoy,such as reading a book,listening to music,or spending time with family and friends.This helps me to maintain a healthy balance between my academic responsibilities and personal interests.。
高考英语词汇分类大全
add v 加
addition n 加法
subtract v 减去
subtraction n 减法
botany n 植物学
zoology n 动物学
physics n 物理
No1.1 math 有关数学的词汇
count v 数数
bent a 弯的
No1.2 physics 有关物理的词汇
matter n 物质
energy n 能
chemistry n 化学
Chinese n 汉语
English n 英语
biology n 生物
art n 美术
science n 科学
philosophy n 哲学
medicine n 医学
engineering n 工程学
Arithmetic n 算术
Geometry n 几何
statistics n 统计学
physics n 物理
relativity n 相对论
microwave n 微波
microscope n 显微镜
telescope n 望远镜
steel 钢
aluminum 铝
carbon 碳
carbon dioxide 二氧化碳
carbon monoxide 一氧化碳
astronomy n 天文学
psychology n 心理学
economics n 经济学
finance n 金融学
law n 法学 氧
atom 原子
acid 酸
No1.4 English 有关英语的词汇