❶ 求英語高手幫我用英語翻譯一篇文章(畢業設計的英文文獻)
你好 翻譯如下 按照你提供的網站 好長啊 先生 ！！！ 累死我了,這么少分.
請注意,下面有中文字幕,圖片我沒幫你弄 因為都是數字,不需要翻譯吧.
希望我能幫到你
Abstract: This paper describes the first measurement data obtained by the functional relationship between the two methods of expression; and then combined with a detailed description of examples of MATLAB a powerful question in this application.
Keywords: MATLAB; measurements; curve fitting; interpolation
I. INTRODUCTION
Under normal circumstances, obtained by measuring only the independent variables X in a number of discrete points on the function Yi (i = 0,1,2 ,...)。 In many applications, but also often measured according to these data, the basis of the analysis to obtain independent variables X and Y dependent variable relationship between the expression of the approximate function (also known as the empirical formula or mathematical model) Y = F (X), computer or scientific research personnel in order to use it to easy analysis or calculation. On the solution of this problem in two ways: 1. Interpolation. Assumed that the measurements are accurate, the requirements in some way to describe the data between data points. 2. Curve fitting. Assumed that the known laws of curves, the best approximation for the curve, but it does not need after all the data points.
MathWorks Inc. MATLAB is introced in the United States an easy-to-use engineering computing language, it is based on matrix calculation, the calculation, visualization, programming into an interactive environment can be achieved in engineering computing, simulation, data analysis and visualization, mapping, application development and other functions. MATLAB in the United States and other developed countries, the university has become a must to master the basic programming language, and in research and design units abroad, but also has long been a research and engineering calculations to solve the problem of a standard software.
Introction to MATLAB in the following measurement data processing applications.
Second, curve fitting
In general, measured by the test data is often a measurement error, such as the requirements of curve through all data points, in fact, it retains all the measurement error, and this is not what we want. Therefore, curve fitting, the fitting curve does not require must be by measuring the data points, and only data points in the measurement error of Xi on the di = F (Xi)-Yi (i = 0,1 ,..., m) by a certain minimum standard, so that it can reflect the trend of discrete data, as far as possible to avoid local fluctuations. Curve fitting method is to deal with projects of a practical measurement data mathematical methods.
The quality of curve fitting is usually always the principle of least squares as a measure of the criteria, because the method in the calculation of other criteria for admission than it convenient and much simpler, and there is sufficient accuracy.
In MATLAB to provide a least-squares polynomial curve fitting function polyfit (x, y, n). Of which: x, y are two vectors, including the fitting to be the x and y data; n is the order of the polynomial; function value of the coefficient of polynomial fitting. The following example to introce the usage of this function.
At present, the domestic proction of low-loss small and medium-sized power transformer core material are basically cold-rolled grain-oriented silicon steel sheet Z10-0.35, following a brief introction on the model of the excitation unit weight of steel capacity Qt (unit: V / kg ) and the core flux density of Bt (unit: Tesla) the relationship between the fitting curve.
Qt and the relationship between Bt as shown in the table below:
這部分是那圖片來的,圖片我就不幫你翻譯了
自己看吧 反正都是微積分的簡單題目
以下是圖片以下開始的翻譯
Steps:
(1) first in the command window to create a vector of measurement data.
Bt = 1.43:0.01:1.80;
Qt = [1.62 1.67 1.70 1.75 1.80 1.85 1.90 1.95 2.00 2.10 2.16 2.24 2.32 2.42 2.54 2.70 2.85 3.00 3.25 3.45 3.70 4.00 4.32 4.70 5.00 5.50 6.00 6.60 7.20 8.00 8.70 9.50 10.50 11.70 12.80 14.30 16.00 17.50];
(2) mapping function and then plot graph.
plot (Bt, Qt, 'x');
The measured data points in the cross shown in Figure, can be seen in their distribution was non-linear.
(3) choice of polynomial order of n 2, the calculation of the coefficient polynomials.
n = 2;% n is the order of polynomial
P = polyfit (Bt, Qt, n)% calculation of n-order polynomial curve fitting coefficient
P =
177.0320 -537.0538 408.7708
That is polynomial for Qt = 177.0320Bt2-537.0538Bt +408.7708.
(4) fit drawing graphics.
z = polyval (P, Bt);% function polyval the Bt used to calculate the value of the polynomial
plot (Bt, Qt, 'x', Bt, z ,'--')% after rendering graphics curve fitting
Map after the dotted line for the curve fitting.
(5) if the fitting result is not satisfactory, then a graal increase in the order of the polynomial n, repeat steps (3), (4).
In this paper, the fourth-order polynomial fitting, fitting function derived from the expression as follows:
Qt = 1587Bt4-9623Bt3 +21919 Bt2-22216Bt +8453
Solid line based on the type of the curve after fitting. Clearly, the 4-order polynomial fitting of the results much better than the 2 bands.
In theory, n +1 data points can be uniquely determined n-order polynomial. In fact, if the order of polynomial is too high, although the data points to see the effect, but there will be data points of data between the oscillations, but the calculation time; but if the choice of order too small, then to be All effects bad. Therefore there is a reasonable choice of the order of the problem.
Third, interpolation
Interpolation method can be easily measured data to the data between the valuation function.
MATLAB provides a curve interpolation function interp1 (x, y, x0, 'method'), in which: x, y data points for the measurement; x0 is a need for a numerical array interpolation; method for the interpolation algorithm, there are the following three options: linear interpolation ( 'linear'), cubic spline interpolation ( 'spline'), cubic polynomial interpolation ( 'cubic'), default is linear interpolation. The return value of function after interpolation function corresponding to the value of x0.
For example, the need to calculate when Bt = 1.655 when the value of Qt.
Using linear interpolation:
Qt = interp1 (Bt, Qt, 1.655, 'linea')
Get Qt = 4.5100
Using cubic spline interpolation:
Qt = interp1 (Bt, Qt, 1.655, 'spline')
Get Qt = 4.5163
Note that spline interpolation with the above results as shown in the results of different linear interpolation. In general, when the measurement of the distribution of data points with good linearity, the linear interpolation should be selected speed; otherwise, to use the cubic spline interpolation or cubic polynomial interpolation.
Polynomial interpolation in the signal processing and image processing applied more widely.
Fourth, the conclusions
As can be seen from using MATLAB to process the measurement data is simple, fast and intuitive. Which, in accordance with the principle of least-squares fitting of the graphics used for the test report or manual calculations to find, come to the polynomial for the theoretical analysis or the use of CAD procts. The method is also suitable for other instries to deal with curves in the chart, and to meet the project accuracy requirements.
❷ 仿寫這篇英語作文
你可以下在一個作業幫，拍照搜，我搜的沒有作文題目要求啥的，都被當成作文理解來搜了
❸ 請幫我用英語翻譯一段話，畢業設計要的，要非常工整，如果這段英文能定稿的話我再加分。
With the accelerated pace of the domestic information technology, combined with the logistics enterprise of the instry's growing demand for information, make the rapid development of logistics information network. Such network's timeliness, accuracy and exactly in line satisfies the requirements of the instry, which makes it the main source of information logistics.
Logistics Information Network provides all kinds of features, like querying the logistics instry information and the supply and demand information, helping businesses understand more dynamic information , improving the efficiency of running, which lets companies have more chances to adjustment the market strategy to meet the business dynamic development.
❹ 英語作文仿寫
do u like 2 work hard? do u like 2 work in a uniform? do u like 2 serve 4 the society? If your answer is positive, then we got a perfect choice for you ---to be a police officer.
Call New York Police Department at 911-9911
❺ 仿寫英文短篇小說，1200詞，兩天，急需！！！！注意是英文！！！有人能幫忙嗎
放棄吧，沒人閑的干這個
除非你直接給錢找人給你寫
❻ 求150字的英語作文 關於畢業設計的 包括主題 靈感來源 等 急求
11月2日星期二陰
昨天晚上，我讓媽媽准備了一些綠豆、黑豆、黃豆和玉米，開始做種子發芽試驗。
我把它們放在一個玻璃杯里，然後往杯子里沖了大約三厘米的水，讓種子在水裡浸泡了一個晚上。今天早上，我把浸泡種子的水倒掉後，把種子放在一個盤子里，上面蓋上一塊濕毛巾。
今天下午放學後，我仔細觀察了它們，發現它們已經有變化了，首先是這些種子比原來大了許多，再仔細一看，黃豆和黑豆都裂開了一層皮，而綠豆已經開始抽出了一點點新芽，玉米看上去沒什麼變化。
11月3日星期三陰
昨天晚上我觀察完後，為了給種子保溫，我聽從媽媽建議，把裝種子的盤子藏在高壓鍋里。
時間已過去了一天一夜，不知種子是否有新的變化。我小心翼翼地從高壓鍋里拿出裝種子的盤子，輕輕揭開蓋在盤子上的濕毛巾，哇噻!我的綠豆芽變長了，綠豆都長出了一條彎彎曲曲的白色的小尾巴，好像豆里鑽出了一條白色的小蟲子，整個綠豆看起來又像一隻綠色的小蝌蚪。而黃豆、黑豆、玉米看上去和昨天晚上我觀察的情況基本一樣，沒有太大變化，我有些擔心它們是否會發芽。
觀察完後，我又給它們澆了一點水，重新放回高壓鍋中，心裡盼望著黃豆、黑豆和玉米快快發芽，盼望綠豆芽快快長大。
11月4日星期四多雲
時間過去了一天一夜，我的綠豆芽又長大了一些，形狀也有些變化了，有些綠豆的小尾巴由彎彎曲曲變成直直的了，看起來像一隻獨角犀牛的頭。我量了量綠豆芽枝的長度，已經有一厘米長了。而黃豆、黑豆仍然沒有明顯的變化，玉米粒表面上出現了一些小黑點，不知道它們是不是要發芽了。
11月5日星期五晴
今天晚上，我又觀察了我的種子發芽情況。
綠豆芽的長勢依然很好，長度已經超過了一厘米，有一半的綠豆種子脫去了綠色的外殼，整個種子的顏色變成了白里透著黃，看上去非常嬌嫩。而黃豆、黑豆仍然沒有發芽，昨天晚上在玉米種子上我發現的黑點，經過仔細觀察，原來是要腐爛的霉點，真是掃興，原來我以為它要發芽了。
11月6日星期六晴
時間已經過去了五天五夜，但是黃豆、黑豆和玉米仍舊沒有發芽，為了給綠豆芽提供一個更好的生長環境，今天晚上，我聽從媽媽的提議，把沒有發芽的黃豆、黑豆和玉米都從盤子里挑了出來，扔進了垃圾筒，並把盤里的綠豆芽用水沖洗了一下。
沖洗過後的綠豆芽，看上去它的長勢更好了，我盼望明天綠豆芽的芽尖上能長出兩片小葉子。
11月7日星期日晴
今天是我觀察種子發芽的最後一天。
綠豆芽的長勢仍舊很好，芽枝的長度已經有兩厘米了，但它們的芽尖上仍然沒有長出兩片小葉子。看著嬌嫩的綠豆芽，我想如果做成菜，一定非常好吃，但我捨不得吃，決定把它們都種在家裡的花盆中，有了土壤的營養，我想它們一定會長出小葉子來的。
通過大約一星期的仔細觀察，我知道了種子發芽一定要有合適的濕度、溫度和營養，如果達不到種子發芽所需要的基本條件，就不會發芽了。
❼ 仿寫英語短文
HOU Did Lids Spend the Weekend?
Last Friday,we asked twenty students at NO.1 Senior High School what they did their homework. For most students,the weekend was fun.On Saturday morning, ten students watch televison. On Saturday afternoon,five kids went playing ,and three study.Tow kids also visited their grandparents. On Saturday evening ,four students watched a cartoon or play football with their friends.On Sunday ,three students played computer games at home,two students went shopping,and slept .
❽ 仿寫英語文章
I wrote a letter to my father yesterday.I told him that I am living in school now and I would come back home soon. If he comes to my school, I will be very happy.My father is living in the old house in a little city.The house was completed over 20 years ago.The house is really rable.There are five people living in the house now.Outside the house, there is a big tree and some flowers.It must be the most beautiful old house in that area.
知識點包括了：一般過去時的用法，現在進行時的用法，一般將來時的用法，if的用法，there be 句型的用法，情態動詞must的用法，系表結構的用法等。
❾ 畢業設計可以仿寫那些大的網站嗎
做個小軟體小系統啥的就行了，一般不要模仿那些大網站。一個是技術上你達不到，再一個功能太多，在畢設這個層次上也沒必要。而且從導師的角度來說，他會要求你畢設的題目盡量專一點兒，能體現技術並且貼近實際應用就可以，不要搞得很大，反而不容易通過。
❿ 仿寫英語作文
Having determination makes you significance because it not only improves you a better person than before but also simplifies your life. From my own plan, I am going to determine to build up four resolutions. First of all, I will improve myself and develop some new hobbys. For example, singing is a good idea as.........(加上原因)
上面那個原文是你自己寫的嗎？感覺沒有連詞和邏輯詞，回好像句子湊到一起的答