比率估計 的英文怎麼說

中文拼音 []
比率估計 英文
estimation of ratio
  • : Ⅰ動詞1 (比較; 較量高下、 長短、距離、好壞等) compare; compete; contrast; match; emulate 2 (比...
  • : 率名詞(比值) rate; ratio; proportion
  • : 估構詞成分。
  • : Ⅰ動詞1 (計算) count; compute; calculate; number 2 (設想; 打算) plan; plot Ⅱ名詞1 (測量或計算...
  • 比率 : ratio; proportion; rate比率計 ratio meter
  • 估計 : estimate; evaluate; take stock of; size up; calculate; appraise; reckon; estimation; forecast
  1. Given the decay rate of 26al, the lower initial ratio in the chondrules implies that these objects formed between one million and two million years after the creation of the refractory inclusions ( assuming that the radioisotope was indeed homogeneously distributed in the early solar system )

    以鋁26的衰變速,這些球粒的初始值較低,表示它們是在耐火包體產生后100 ~ 200萬年才形成(假設鋁26在早期太陽系中確實是均勻分佈的) 。
  2. So we consider five financial indexes includes stock b / p, e / p, current stock size, current stock stru and financial levge by the international tradition, then descriptive statistical test method and cross section statistical test method proved that b / p and current stock size have marked effect on the securities yield besides coefficient b. in the third chapter, the article fut forward a risk factor model, estimates yield sequences of every risk factor by weight regression, and then estimates each risk factor coefficient of different stock by time sequence regression, at last we can reckon the portfolio risk o2p and yield rp which consists n stocks

    結合國際慣例,文章考慮了股票的凈值市價( b p ) ,市盈倒數( e p ) ,流通規模( size ) ,流通例( stru )和財務杠桿( levge )等五個財務指標,應用描述性統檢驗和橫截面統檢驗等多種方法,結果表明,除系數以外,凈值市價( b p )和流通規模( size )對證券收益部有重要的影響。在論文的第三章,提出了一個基於多因素的風險因子模型,並用加權回歸和時間序列回歸等方法出了不同證券的各風險因子系數(類似於單指數模型中的系數) ,據此,即可衡量出一個包括n只股票的組合的風險_ p ~ 2和收益r _ p 。
  3. The amplitudes of the two ffts are the same, but their phases, < px and < p2, changes with the range differently

    Rao下限,在信噪為6db , fft長度為1024的情況下,頻均方根誤差小於fft頻解析度的1 。
  4. Chapter 4 designs and determines the parameters of the algorithm adopted in the instrument system. analyzes and compares the different effects to frequency estimation when using digital filters with different group delay ; determines the data length, a parameter of frequency estimation ; introduces the method of available judgment of sensing signal and determines the judgment threshold as well

    第四章設和確定了儀器系統軟體演算法的部分參數:分析和較了不同群延遲特性的數字濾波器對頻的影響;確定了影響頻參數?數據長度的取值規律;給出了判斷傳感信號有效性的檢測方法並確定了檢測門限的取值規律。
  5. The first facet is to put forward four - step block matching algorithm which can deduce the time of motion estimation and improve the coding efficiency, based on the traditional motion estimation algorithms. the second facet is to propose a new rate control algorithm, that is average - reaction rate control algorithm, based on the rate control of mpeg2. the new rate control algorithm can achieve rapid and efficient adaptive coding

    首先在對傳統的運動演算法進行研究和改進的基礎上,提出了四步搜索塊匹配的運動演算法,減少了運動的時間,提高了編碼效;其次在分析mpeg2控制的基礎上,提出了一種新的控制演算法? ?平均響應控制演算法,該演算法能夠快速有效的實現自適應編碼。
  6. Investors produce biases systematically in their decision making. debont and thaler believe that overconfidence is one of human being ’ s most stable psychological characteristics and their evidences show that people are overconfident of the probabilities of occurrences of uncertain events in their decision making

    投資者系統性決策偏差較多, debont和thaler認為過度自信是人類最為穩定的心理特性,他們列舉了度量的證據顯示人們在做決策時,對不確定性事件發生的概過于自信。
  7. Based on the method, this dissertation deals with several kinds of signals including cosine wave ( cw ), linear frequency modulated ( lfm ) and multi - component signal, furthermore the systematic comparison of estimation effect among cwt and several other usual methods as well cramer - rao bound ( crb ) is given

    基於上述方法,文中分別對單頻矩形脈沖信號、線性調頻脈沖信號以及多分量信號進行了瞬時頻,並與其他幾種常用瞬時頻方法的性能以及crb進行了系統較。
  8. From the result we get the following conclusion : for narrow - band signal, the effect of the method based on fft is best. for wide - band signal, when snr is up to certain degree ( higher than - 7db or so ), the curves of square error of modified methods are more obvious and closer to crb. for an echo composed of more than one frequency or direction, space - frequency distribution could show more direct information of frequency and direction, which is more advantaged to make precise judge and estimation for doa of echo

    結果發現,對于窄帶回波信號,基於fft的方法性能大大優于其他方法;對于寬帶回波信號,在信噪達到一定程度(高於約- 7db )時,補償后的幾種法的性能改善均較明顯,誤差曲線越來越接近crb曲線;對于回波中存在多頻多方位的情況,空間?頻分布圖能提供較為直觀的頻及方位信息,因此應用空間?頻法來進行方位,更有利於進一步對回波的具體方位進行準確判斷和
  9. During the instantaneous frequency estimation of lfm, there exists some error in the edge, so in the dissertation, a fitting method is proposed to modify it. from the computer simulation, the following result is obtained : for cw, the method based on cwt is most effective, and with the snr rising, the error curve of it is more and more closer to crb. for lfm, the method based on wvd gives the best result, and the effects of cwt and stft are similar for multi - component signal, compared to stft and wvd, cwt is a better choice

    通過模擬發現,在單頻回波的瞬時頻中,基於cwt的方法最為有效,隨著信噪的提高,其均方誤差曲線越來越接近克拉美?羅界;在線性調頻回波的瞬時頻中, wvd法得到的效果最好,而cwt與stft法的效果較接近;在多分量信號的瞬時頻中,相對于stft和wvd法, cwt法是一個更好的選擇。
  10. Methods of estimating baud rate, signal to noise ratio ( snr ) and reference phase are investigated. a modified euclidean algorithm is proposed to estimate baud rate of the burst packets. a cumulant based algorithm of estimating snr of star - qam is proposed which has better estimation performance in medium scope of snr

    研究了自適應調制中波特,信噪和載波相位等參數的演算法;提出一種基於修改的歐幾里得演算法的波特演算法,這種演算法可以對突發分組的波特做出準確;提出一種星型qam信號的信噪演算法,在中等信噪條件下,具有較好性能。
  11. Order tracking of rotating machinery based on instantaneous frequency estimation

    基於瞬時頻的旋轉機械階跟蹤
  12. It uses factor analysis method and dualistic relative comparative method to account the ability place of a loan enterprise in its industry, which can confirm the station in its industry better. by using time series model to forecast an enterprise ' s cash flow in the future, we can measure the repayment ability of an enterprise. by using logit model to account the probability of default for a loan enterprise, we can estimate the possibility of its default

    運用因子分析法和二元相對較法算貸款企業在本行業中的財務能力排名,更好地確定其在本行業中的地位;運用時間序列模型預測企業未來的現金流量,從而測度貸款企業未來的還款能力;運用logit模型算貸款企業的違約概其違約的可能性;從貸款企業的行業風險、經營風險、管理風險、借款人還款意願等方面對貸款企業的非財務因素進行分析。
  13. In chapter, after explaining the relation between the definition of default and default incident, the author makes a definition that default probability is the borrowers ’ probability of incurring default incidents, followed by summary of the role of default probability playing in the credit risk management and comparison of the advantages and disadvantages of four modern famous credit risk models

    第二章對論文的基本概念進行界定。在本部分,指出現代違約定義由一系列違約事件構成,違約概是指債務人發生違約事件的概,介紹違約概在信用風險管理中的地位,對各種違約概方法進行了較。
  14. A fast and accurate algorithm to estimate the frequency of a coherent pulse sinusoid is presented in chapter 3. it is based on the autocorrelation iterative method, and the simulation results show that for the lower snr, this algorithm can accord with the request of the soplat ’ s precision and less computational complexity. therefore, it ’ s a promising algorithm for practical application

    在對正弦脈沖信號的頻中,第三章在總結、較前人演算法的基礎上,選擇了基於自相關迭代的頻精確演算法,並進行模擬分析,結果表明,該演算法在較低信噪時,可以達到單站無源定位所要求的精度,且運算量小,具有廣闊的應用前景。
  15. Based on the analysis of solving ambiguity, the thesis presents several algorithms for estimating doa and an algorithm for estimating frequency by using methods of subspace parameter estimation under sub - nyquist spatio - temporal sampling condition

    論文在分析解模糊思想的基礎上,給出空時欠采樣下運用子空間類參數方法波達方向的幾種演算法和一種頻演算法,並從性能上進行了較和分析。
  16. The maximum likelihood estimator ( mle ) approach is an important one in frequency estimation domain. this approach has the merit such as exhibiting best performance and requiring minimum threshold of signal noise ratio in calculation

    最大似然頻法是該領域中的一種重要的研究方法;該方法具有結果準確,算所要求的信噪門限值低等特點。
  17. Theory simulation results show that the methods mentioned are feasible to detect and estimate the short pn sequence modulation ds signals whose pn sequence length is 63 to 1023. the delay and multiply approach can be used to estimate the chip rate of long pn sequence modulation ds signals, and the improved algorithm of it is available in lower input snr. the performance of the

    延時相乘法對長pn碼調制信號pn碼速也適用,其改進法的信噪容限改進前降低;二次功譜法和倒譜法對短pn碼調制有很好的檢測和性能,但對長pn碼調制不適用,而基於延時相乘的二次功譜法可以很好的出長pn碼調制信號的pn碼周期。
  18. The hardware and software of the automatic diamond cut measuring system developed by gemmological institute, china university of geosciences ( wuhan ), are mainly described in the paper

    主要介紹了中國地質大學(武漢)珠寶學院自主研製的全自動鉆石切工分析系統的硬體組成、圖像處理以及切工算、評與應用等。
  19. In chapter 1, the basic principle and structure of the integrated anti - interference data transmission system are introduced. in chapter 2, the theory of maximum likelihood ( ml ) carrier synchronization parameter estimation ( frequency estimation and phase estimation ) are expatiated, and the closed - loop recovery methods ( phase - locked loop, pll ) and some other arithmetic in common use are introduced

    第二章對最大似然( ml )載波同步參數(頻和相位)理論進行了闡述,對常用的閉環恢復法即鎖相環( pll )法和一些載波同步參數處理方法進行了介紹,並對常用的載波頻方法作了分析較。
  20. Image offset method that is also fast can be applied to motion compensation, time - frequency method is intuitionistic and have a better accurate, which is applied extensively on offline. fractional fourier transformation method is not accurate, but which have some now application in signal processing

    在多普勒調頻斜中,時頻分析法較直觀,精度也不錯,脫機處理中獲得了廣泛的應用,圖像偏移法速度快,在運動補償中得到了應用。
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