抽樣方差 的英文怎麼說

中文拼音 [chōuyàngfāngchā]
抽樣方差 英文
sampling variance
  • 抽 : 動詞1 （把夾在中間的東西拉出; 提取） take out （from in between） 2 （從全部里取出一部分; 騰出） ...
  • 樣 : Ⅰ名詞1. （形狀） appearance; shape 2. （樣品） sample; model; pattern Ⅱ量詞（表示事物的種類） kind; type
  • 方 : Ⅰ名詞1 （方形; 方體） square 2 [數學] （乘方） involution; power 3 （方向） direction 4 （方面） ...
  • 差 : 差Ⅰ名詞1 （不相同; 不相合） difference; dissimilarity 2 （差錯） mistake 3 [數學] （差數） differ...
  • 抽樣 : [統計] sample; sampling; specimen; samples draw
  • 方差 : dispersion
  1. Sampling and analysis of iron, steel and other ferrous metals - methods of analysis - determination of chromium - ferrochromium and ferrosilicochromium : potentiometric method

    鐵鋼和其他黑色金屬抽樣與分析.第3部分:分析方法.第10節:鉻含量測定.第4小節:鐵鉻合金和鐵硅鉻合金:電位差計法
  2. Fpga and dvb standard are introduced firstly, dvb - c standard and composition of its system are analyzed completely, development of modulator structure and dvb - c digital modulator composition are presented, more over, analysis of respective modular are given. then, principle of dvb - c digital modulator system are presented, they are error control technique 、 mqam 、 nyquist rule and root raised cosine filter 、 window design method for fir filter 、 multi - rate signal processing ( integer interpolating, conversion of fractional sampling, equal conversion of net structure, polyphase structure for filter, poly - phase structure for interpolator, multi - stage implementation of samplying conversion ) 、 distrubited algorithm 、 cic filter 、 dds 、 cordic algorithm

    接著，專門利用一個章節闡述了dvb - c前端調制系統原理，他們了差錯控制技術、多進制調制（ mqam ） 、 nyquist準則與平方根升餘弦濾波器、有限沖擊響應濾波器的窗函數設計法、多抽樣率信號處理包括（整數倍內插原理、分數倍抽樣率轉換、網路結構的等效結構、濾波器的多相表示、內插器的多相表示、抽樣率轉換的多級實現） 、分散式演算法、 cic濾波器、直接數字頻率合成（ dds ） 、 cordic演算法。
  3. First, this paper gives an introduction of some methods of unequal probability sampling, their estimators and variance estimators, including sampling with pps with replacement, methods of sampling without replacement suggested by brewer, durbin, sampford, des raj, murthy, rao - hartley - cochran. then, at the basis of rao and bayless ' s study, we consider that population can be splited two random subpopulations, which are respectively drawn from different infinite super - populations, and compare the stabilities of estimators of the methods that given above. we find that the minor difference between two super - populations has great effect on the efficiency of the estimators for the population with moderately large coefficient of variation ( c. v. )

    本文首先從理論上介紹了若干種不等概率抽樣方法，它們的估計量、估計量的方差及其估計，其中包括有放回ppz及pps抽樣，不放回不等概率抽樣中的brewer 、 durbin 、 sampford 、 desraj ， murthy 、 rao - hartley - cochran等人的方法；其次，在rao和bayless兩人就樣本單元數n = 2的情形對上述抽樣方法進行比較的基礎上，將總體隨機地分成兩個子總體，視每個子總體取自不同的線性超總體，在文中，我們利用計算機實現隨機分組，並通過畫圖比較各方法估計量的穩定性，結果表明，對變異系數c . v . （ x ）較大的總體而言，兩個超總體之間的微小差異將對估計量的穩定性產生很大的影響，從而說明rao和bayless的比較結果還不夠完善。
  4. Importance sample method has the potential applied value in computer simulation of error control systems

    重要性抽樣方法在差錯控制系統模擬中有潛在的應用價值。
  5. Based on the theory of charge calibration and sample and reconstruction of frequency limited signal, the scheme of adopting direct digital synthesizing technology and technology of computer is put forward in the paper. the design of hardware and software is described in detail, the error of the outputs signals of the high precision charge calibrator has been analyzed in theory

    文中基於電荷校準的原理及帶限信號的抽樣與重構理論，提出了採用直接數字合成技術與計算機技術的整體設計方案，詳細講述了硬體電路與系統軟體的設計過程，並對高精度電荷校準儀輸出信號的誤差進行了理論分析。
  6. 4. during the investigation of distinction in mathematical cognitive structure, the author uses statistical sampling method. by test - analysis, observation, conversation and exchanging with teachers, the qualitative and quantitative analysis is made

    在對高中生數學認知結構個體差異的調查研究中，筆者首先採用整群+分層抽樣的統計方法選取了樣本，然後通過問卷測試?分析法、觀察法、談話法以及與數學教師的交流對調查結果做出了定量和定性的分析。
  7. Objective : to analyze the data of the permanent teeth caries and treatment needs of six age groups people in beijing with statistical methods which came from the second national oral health survey of china in 1995. method : the total sample of 12792 ( 8520 urban, 4272 rural ) for 6 age groups ( 5, 12, 15, 18, 35 - 44, 65 - 74 - year - old ) were examined. the diagnostic criteria recommended by the world health organization were used in this study ( oral health survey basic methods third edition, 1987 ). result : the dmf and dmft incidence of six age group in the urban was higher than that in the rural on the whole. the dental caries level of 12 - year - olds was very low. f percentage of 12 - year - olds was 15. 42 % ( urban ) and 3. 23 % ( rural ). the current situation of chinese dental care cannot meet the who objectives for the year 2000. conclusion : it pointed out that we should emphasize oral health education and enhance the consciousness of health care. since the treatments of caries became more complicated with the age, we should perform the primary oral health care in the early stage

    目的:本文對1995年第二次全國口腔健康流行病學調查中，北京地區六個年齡組人群的恆牙患齲及治療需要情況進行統計學分析.方法:採用整群抽樣方法，對北京市六個年齡組的城鄉人群12792人（城市8520人，農村4272人）進行了口腔檢查，診斷標準根據世界衛生組織1987年第三版一書.結果:各年齡組的患齲率及齲均基本是城市高於農村， 12歲年齡組的患齲情況處于很低水平， 12歲年齡組恆牙充填率為15 . 42 （城）和3 . 23 （鄉） ，結論:本結果離2000年目標有一定差距，提示我們應加強口腔健康教育，提高居民口腔保健意識.另外，隨年齡的增長牙齒治療的復雜程度逐漸增高，因此，應在人群中開展初級口腔衛生保健，做到早發現，早診斷，早治療
  8. The standard rejection sampling method which is introduced in chapter 2 is closely related to the problem of quasi - monte carlo integration of characteristic functions, whose accuracy may be lost due to the discontinuity of the characteristic functions

    第2章介紹的標準拒絕抽樣方法其實跟特徵函數的蒙特卡羅積分有密切的關系。而由於特徵函數的不連續性，蒙特卡羅積分應有的誤差精度就達不到，拒絕抽樣的效果也就受到影響。
  9. We believe the principle reasons are : there is disparity in the conception of the domestic tourist, sampling methods are not universal ; the totality surveyed or calculated is inconsistent

    認為其主要原因是：國內旅遊者的概念理解存在差異；抽樣調查方法不統一；推算的總體不一致等。
  10. In chapter 1, the author first study the two - stage confidece intervals for the variance of a normal distribution, then work out the optimal sample size of the first stage by numerical computations and establish a proof for the non - existence of fixed - size sampling

    在第1章里，作者首先研究了正態總體方差的兩步置信區間，並用數值計算的方法給出了第一步的最優抽樣量，且證明了固定樣本抽樣的不存在性。
  11. The present methods for testing the large - scale corpus segmentation have the following faults : a. it is difficult to exactly estimating the variance of population ; b. the sampling quantity is too large to test the corpus segmentation. to solve the given problems, we put forward the testing method based on clustering, which sorts the sample of corpus into many group by clustering them

    語料庫分詞質量的評價問題是漢語語料庫的特有問題，已有的簡單隨機抽樣的方法，當語料庫規模變大時，無法精確估計分詞質量評價中語料庫樣本的總體方差，同時，為了保證檢驗的精度，傳統抽樣方法的檢驗費用太高。
  12. Based on the sampling error in the normal random sampling and layered sampling, the methods of determining sample volume and selecting of sampling themes are studied

    對於一般隨機抽樣與分層抽樣根據給定的抽樣誤差確定抽樣量，探討樣本容量的計算方法和選擇抽樣檢驗方案的方法。
  13. The beam width is stretched. the algorithm performance has the very big weaken. but the convention beamforming algorithm performance is stabler, time delay unbalance, time domain sampling, plane wave supposition and array element the influence which creates to it is not big

    通過比較，高解析度演算法在考慮上述情況后，波束方向出現偏差，束寬被展寬，幅度有很大的衰減，性能明顯下降;而常規波束形成演算法的性能較穩定，延時失配、時域抽樣、平面波假設和基陣的幅相不一致對其造成的影響不大。
  14. Determining the sample size is crucial for a survey sampling design, for which traditional approaches have to seek some information on population variance or survey costs, however, which may result in either sample size too small and real precision undre desired level, or sample size too large and waste of survey costs

    摘要樣本量的確定是抽樣設計中的關鍵問題，傳統方法利用總體方差和調查費用的有關信息來確定樣本量可能產生兩種結果，一種是樣本量過低，無法保證希望的估計精度要求；一種是樣本量過高，導致調查經費的浪費。
  15. In this paper, the theories and techniques of data quality control are thoroughly studied by taking pudong construction and management geographic information system ( js - gis ), including error analysis and accuracy evaluation of digitized data, sample tests of housing surveying product, the principle and method of disfigurement measurement of attribute data based on sampling theories, and total quality control techniques of gis data. these methods are implemented in the construction of js - gis. the main contents are as follow : 1

    本論文以浦東建設管理地理信息系統（ js _ gis ）為例對gis數據質量控制的一些具體內容進行了研究，包括數字化數據誤差分析以及精度評定、房產測量成果的抽樣檢驗、屬性數據缺陷率度量的抽樣原理和方法、 gis數據的全面質量控制方法，並將這些方法應用於js _ gis中，主要內容有： 1 、介紹js _ gis的系統組成，對js _ gis中數據的主要構成以及數據採集進行分析。
  16. Based on brorrowing home - abroad current situation and their experiences of finance in sme, it has deeply investigated and studied the current financial situation of sme with many survey methods, such as governmental information reaction, experts " consultation, forums investigation and questionnaire methods etc, and concludes the current situation, main characteristics and facing challenges of heilongjiang province etc. it clearly points out the main problems that have existed in the whole province for a long time. i. e. singularity of financial means, not smoothing of financial channel, lack of small - medium sized financial setup and environmental difficulty of social credit

    該項調查在借鑒國內外中小企業融資現狀和經驗的基礎上，採用政府信息反饋、專家咨詢、抽樣調查、典型調查、座談調查、問卷調查等多種調查方法，對黑龍江省中小企業融資現狀進行了深入的調查與研究，總結出了黑龍江省中小企業融資現狀、主要特點、面臨的形勢；明確指出存在的主要問題，即融資手段單一，融資渠道不暢，中小金融機構不足，社會信用環境差；得出了黑龍江省中小企業融資難的結論。
  17. Given the high - dimensionality ( thousands of genes ) and small sample sizes ( often < 30 ) encountered in these datasets, an honest assessment of sampling variability is crucial and can prevent the over - interpretation of spurious results

    Dna晶元數據具有高維（成千上萬個基因）和樣本小（通常小於30 ）的特點，為了避免對偽結果進行分析，準確估計抽樣方差很重要。
  18. Traditional research has put much effort on finding the unbiased and less - constricted parameters of mean - variance ( m - v ) portfolio theory. on one hand mean - variance is perfect in its mathematic sense

    本論文主要目的是利用再抽樣方法改進傳統均值-方差模型，以使其得到更大的實際應用。
  19. In sample problem studying, the optimal source direction biasing parameter p1 、 exponential transform parameter p2 are supposed and the variance of duct calculating results by using this method is shown to reduce efficiently

    提出了算例問題的最佳源方向偏倚參數p1和指數變換參數p2 ，得到的耦合抽樣方法更能有效降低計算結果的方差。
  20. As for the directors of bureaux, compared to two months ago, only arthur li ' s support rating registered a significant increase, all other changes are within sampling errors

    局長方面，對比兩個月前，只有李國章的評分有明顯升幅，其餘變化都在抽樣誤差范圍之內。
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