統計點估計 的英文怎麼說

中文拼音 [tǒngjìdiǎngūjì]
統計點估計 英文
statistical point estimation
  • 統 : Ⅰ名詞1 （事物間連續的關系） interconnected system 2 （衣服等的筒狀部分） any tube shaped part of ...
  • 計 : 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...
  • 點 : Ⅰ名詞1 （液體的小滴） drop （of liquid） 2 （細小的痕跡） spot; dot; speck 3 （漢字的筆畫「、」）...
  • 估 : 估構詞成分。
  • 統計 : 1 （對有關數據的搜集、整理、計算和分析） statistics; census; numerical statement; vital statistic...
  • 估計 : estimate; evaluate; take stock of; size up; calculate; appraise; reckon; estimation; forecast
  1. And then facing the problem of the channel estimation of the adaptive modulation system, we conclude out the channel estimation algorithms on maximum likelihood ( ml ) estimation and maximum a posteriori ( map ) estimation under the condition of flat fading channel and selective fading channel in detail. to meet flat fading channel, we simulate the relationship of the ratio between the error covariance in map estimation and ml estimation and pilot symbol message length. the conclusion can be drawn from these results

    接著，對自適應調制系統中的通道估計問題難點，詳細推導了平衰落通道條件下和選擇性衰落通道條件下最大似然（ ml ）估計和最大后驗概率（ map ）估計演算法，針對平衰落通道，我們模擬了map估計和ml估計的方差與導頻符號長度的關系，模擬結果表明，錯誤方差受多譜勒頻率的變化影響最大，並且對實際的自適應調制系統，導頻符號長度的取值超過20個符號長度時， map通道估計明顯優于ml通道估計。
  2. Third, this dissertation analyzes the complicacy of result size estimation problem for xml structure based query optimization compared to its counterpart in traditionally relational database, and proposes a full - featured result size estimation algorithm for xml query, sxm. for simple path expression query, this dissertation proposes a dynamic synopsis model for xml data based on the concept of f - stable and b - stable, xmap. for complicated path expression query, this dissertation adopts an improved bifocal sampling method for result size estimation

    第三，分析了xml結構化查詢優化中的查詢代價估計問題與傳統關系型數據庫中的查詢代價估計問題的區別，提出了一套完整的xml結構化查詢代價估計體系sxm ，包括對簡單路徑表達進行查詢代價估計的動態xml數據統計模型xmap ，對復雜路徑表達進行查詢代價估計的雙焦點例舉法，以及對值匹配條件進行查詢代價估計的基於小波的多維直方圖方法，並能將多種查詢表達的查詢代價估計結果結合在一起，以給出一個完整的xpath查詢的代價估計。
  3. In the presented method, the point estimations of the model parameters, aandb in the new model, are given by the least square method. the confidence interval for the parameter b is given as well. an engineering illustration is used to compare the result of the presented method with those of amsaa - bise model and duane model

    該模型充分考慮了增長過程中的各種可得信息，採用非參數方法得到多臺系統在各同步停止試驗時刻的可靠度，並利用最小二乘法擬合求得該模型中參數a ， b的點估計值，以及b的置信限。
  4. In order to improve the efficiency of classification based on feature matching, the method of azimuth estimation from sar image is studied. a method of target ' s azimuth estimation from sar image using peak featur e based on linear regression is proposed, besides goodish estimation accuracy and high computation efficiency, it can also provide the confidence interval of the estimation, which can meet the need of model - based sar atr system that uses feature very well

    為了提高基於特徵匹配的saratr系統的分類效率，論文進一步研究了sar圖像目標方位角估計方法，提出了一種利用峰值特徵基於線性回歸的sar目標方位角估計方法，該方法除了具有計算速度快、估計精度較高的特點之外，還能在估計方位角的同時，給出該估計的置信區間，從而能更好地滿足利用特徵基於模型saratr系統的需要。
  5. The third chapter focuses on how to measure and to evaluate the risks. it elaborates how to guesstimate the probability that the risk will occur and how to - evaluate the risks. the method how to unify different kinds of expense of risk into i economic expense and how to evaluate the risks by the method of direct economic evaluate is brought forward, and it is used in the identifying and evaluating the risks of the spanning girders project

    在第三章中，項目風險的度量與評價是論述的重點，該部分詳細論述了如何進行項目風險發生概率及其後果的估計及如何進行項目風險評價，提出了如何將不同性質的風險損失統一為經濟損失的方法和用直接經濟評價法進行項目風險評價與決策，並在中鐵五局架梁項目的風險度量和評價中進行了運用，這也是本文理論上有所創新的地方。
  6. With the rapid development of the security stock market especially the stock market in chian ， issuing stock and circulating on market became the first choice of financing for more and more enterprise at the same time ， more and more investors are attracted by the relately high initial return of stock however ， the problem of ipos underpricing always exists in the stock market according to the data of more than one thousand chinese stocks ， most new issues had great raise in the first trade day ， and investors could acquire higher initial return than the average return of the stock market or the same industry we find that initial returns on a - share ipos average reached 132. 24 percent the main body of this paper is made up of six sections ： in the first part ， we introduced the method of the estimate of pricing decision ； in the second part ， we analyzed the method of the pricing decision and issuing system in china ， discussed the advantage and weakness of the various issuing methods ， and compared the economic efficiency between the examine and approve system and authorization system ； in the third part ， we analyzed the reason of ipo ' s underpricing in detail from information economics and other factors and combined with the environment of the chinese stock markets ， we analyzed the special characteristics in china and how they effect the ipo ' s underpricing in the fourth part ， we analyzed the data of chinese stock market with spss ， made a analysis of the administrative pricing decision and market pricing decision ， studied the underpricing phenomena of chinese stock market ， and analyzed it ' s causes ； in the fifth part ， we made a analysis of the examine approve system and authorization system ； and in the last part ， we drew some conclusions and put forth some policy advices the follow are the conclusions and policy advices in this dissertation ： （ 1 ） from the results of this empirical study ， we found that the issuing price - earning ratio and the market situation before ipos are strongly and positively associated with the underpricing of shares ， the issuing scale of ipo and the hit rate are strongly and negatively associated with the underpricing ； （ 2 ） we found that after the abolishing of ipo ' s p / e ratio and the using of authorization system ， there is no significant difference among the underpricing of shares ， but considered with the market entironment ， we think that the ipo ' s underpricing has been correspondingly reduced （ 3 ） to reduce difference between the primary market and the second market ， we suggested that we shall bring the " over - allotment option ( oao ) " to bear and resume the state - owned share and corporate - owned share to circulate on market as soon possible

    本文的主體由六個部分組成：第一部分介紹新股發行定價的估值方法；第二部分對我國的發行定價方式和發行制度進行分析，探討不同發行定價方式的優缺點，以及審批制和核準制經濟效率分析；第三部分從信息經濟學角度和其他因素的角度詳細分析造成新股發行抑價的原因，並結合我國股票市場實際情況，分析了我國市場的特有因素是否及如何影響一級市場的發行抑價程度的；第四部分利用統計分析軟體spss對我國新股行政化和市場化定價進行實證分析，主要包括新股發行行政化和市場化定價方式的實施情況和效果分析、新股發行行政化定價方式的實證分析，以及新股發行行政化和市場化定價方式的比較實證分析；第五部分利用統計分析軟體spss對我國新股發行審批制和核準制進行實證分析；第六部分是本論文的主要結論。本文的主要結論和建議有： （ 1 ）從實證分析結果看，我國新股發行抑價與市場環境、發行市盈率呈顯著正向關系，與發行規模、申購中簽率等呈顯著反向關系。 （ 2 ）取消發行市盈率限制和實施核準制等市場化改革措施並沒有降低發行抑價的絕對水平，只是由於市場環境的因素，發行抑價的相對水平才有所降低。
  7. According to the national assessment of educational progress ( naep ), maths scores for nine - year - olds improved by nearly two percentage points between 1999 and 2004, while those for 13 - year - olds rose one point

    根據全國教育進步評估（ naep ）的統計顯示， 8歲兒童的數學成績在1999到2004年間提高了將近2個百分點，與此同時， 13歲兒童的數學成績提高了百分之一。
  8. In this dissertation, the location estimation methods for mitigating the influence of the nlos propagation and the location parameters estimation methods for ds - cdma cellular radio systems are studied. furthermore, the influence of the nlos propagation on the performance of radiolocation systems is analyzed. moreover, by using pilot sequences from the base station ( bs ) in wireless cdma cellular networks, the techniques for detecting and locating and tracking for 3 - d moving target are provided

    本論文針對蜂窩網中移動臺定位這一熱點，研究了移動臺定位的非視距影響減輕技術以及適用於ds ? cdma系統的定位參數估計技術，分析了非視距對定位性能的影響，並研究了利用蜂窩網路資源對三維運動目標的檢測、定位與跟蹤技術。
  9. This article combined the present new situation of the development of science and technology in the universities, and summarized the common methods that were often used in the present evaluation of scientific research performance and the coexistent drawbacks, with the aim at enhancing the rationality of the scientific research evaluation. this study demonstrated the relation of metric analysis of scientific papers and the scientific performance in the universities by analyzing periodical literatures distribution and citation rules, according to the theory of scientometrics. this article also emphasizes on metric analysis of scientific papers and investigated the related indexes and their meaning

    本文結合高校科技發展的新形勢，以提高科研評估的合理性為目標，總結分析了當前科研績效評估中常用的方法與存在的問題；以科學計量學理論為依據，從期刊文獻分佈與引證規律的角度，闡述了科技論文計量分析與高校科研績效評估的關系；以科技論文計量分析為重點，研究了論文計量分析的相關指標及其合理內涵；以專家咨詢和數理統計為主要方法，建立了由論文計量分析指標組成的論文綜合評估體系；在對該評估體系進行科學性第四軍醫大學碩士學位論文和實用性分析后，應用評估體系對某軍醫大學附屬醫院的部分科室進行實際測評；最後結合評估實踐，提出了提高科技論文質量的建議，以及科研評估中應注意的問題。
  10. First, the nonlinear ls problem without constraint is converted to that subjected to inequality constraints by putting constraints on the do as of the received signals and toas of the first arrived signal with geometrically based single - bounce ( gbsb ) statistical channel model and cost - 207 model. then, a penalty function is used in the estimation of ms position

    首先，用基於幾何結構的單次反射圓模型和cost - 207模型，對期望定位用戶的各條多徑信號的波達方向和最先到達多徑信號的時間進行約束，將傳統的解無約束的非線性最小二乘定位問題或近似線性最小二乘定位問題轉化為解不等式約束的非線性最小二乘定位問題；然後，用內點罰函數法估計移動臺的位置。
  11. Here a low cost optimal position system with speed - loop open and position - loop closed based on fuzzy control is presented, it employs fuzzy controller to verdict rotor velocity approximately and a fuzzy switching curve is substituted for real one to achieve bang - bang switch, no limit - loop or oscillation occurs. at the end of this chapter, a dc break curve is discussed

    為了實現經濟實用的點對點快速定位系統，實際系統採用速度開環、位置閉環結構，速度量從模糊控制器得到，既不實測也不軟體估計，用模糊開關線代替真實開關線進行控制量狀態切換，無極限環或振蕩現象，而成本則大大降低。
  12. Therefore it is the sticking point for solving the problem about separating the duty to find methods by which the customer emission level can be accessed ( the voltage that a customer ' s harmonic current begets at the point of common coupling ) more accurately

    由於劃分的依據主要由用戶與電力系統雙方發射的諧波電流在公共聯接點引起的電壓降的比例決定，因此，尋求對用戶諧波發射水平（用戶諧波電流在公共聯接點所引起的電壓降）的準確估計方法，成為了解決責任劃分問題的關鍵。
  13. Finally, the method of estimating power customer emission level based on binary linear regression is put forward, which make it a condition that harmonic emission is steady at the point of common coupling. combined with power system thevenin equivalent and customer norton equivalent, according to the principle of least squares method, the voltage that a customer ' s harmonic current begets at the point of common coupling can be estimated in the light of the plural correlation of network parameters

    最後，提出了基於二元線性回歸的用戶諧波發射水平估計方法，該方法在假設公共聯接點諧波發射穩定的情況下，結合系統側戴維南等值與用戶側諾頓等值的電路圖，按照最小二乘法原理，利用電網各參數的復數關系推導關于系統側諧波阻抗的二元線性回歸方程，並根據諧波阻抗的估計值求取用戶諧波電流在公共聯四川大學碩士學位論文（ 2003 ）接點產生的電壓降。
  14. By complementing the proposed scheme with methods to estimate the fractional code delay, the acquisition unit an provide high quality delay estimates such that it can instead of the delay locked loop in the traditional ds receiver. after dispreading successfully, this dissertation introduces a method to estimate the doppler - shift directly from some samples based maximum likelihood estimation, and then revise it forwardly

    在成功解擴之後，本文利用最大似然估計從l個樣點中直接估計出殘余多普勒頻偏，並進行前向頻偏校正，來代替傳統擴頻接收機中的科斯塔斯環，經模擬證明該方法的估計精度完全滿足解調的要求。
  15. According to the dominant characteristics of test analysis and assessment in small sample circumstance, the bayesian method in small sample statistical inference and fusion theory is adopted as an important and suitable approach. the main research work includes bayesian multi - information fusion using credibility and data fusion of different environments in this dissertation

    本論文針對當前小子樣試驗分析與評估的特點，以bayes方法為小子樣統計推斷與融合理論的研究主線，重點研究了基於可信度的bayes多源信息融合方法以及不同環境下試驗數據的融合方法。
  16. 3. based on the information fusion estimation theory, a significant conclusion is drawn that the allocation of information cannot change global estimating accuracy, only local estimating accuracy. therefore, information magnitude sharing coefficient is unnecessary to be adaptivcly determined, which rectifies a false standpoint in the literatures [ 108. 129, 131, 140. 141 ]

    基於信息融合估計理論，研究指出聯合濾波中信息分享系數取值的不同只能夠影響對應子系統狀態的估計精度，並不能影響系統狀態的估計精度，信息分享系數往往沒有必要進行自適應確定，糾正了文獻[ 108 ， 129 ， 131 ， 140 ， 141 ]中的錯誤觀點。
  17. In the brief introduction to geographical information system ( gis ), this dissertation proves that by combining reliable management with gis technology, presents a method which built the power structure model and math calculation model by using spatial data in a good interface between computer and user. this dissertation makes a number of target for calculating the distribution system, mainly aimed at circumstances which have an effect on power station repair, switch breaker, type of t connection, and double lines supply via the usage of system reliability calculation. at the same time, it provides the projected estimatio n when power station or transmission line will be added into the power system, and furnishes the theoretical information that the professional needs for power structure programming, design and equipment management

    通過建立輸變電設施管理信息系統（ mis ） ，真實地反映出油田電網輸變電設施的運行管理現狀，為網路可靠性計算提供可靠的計算依據；在簡述地理信息系統（ gis ）技術的基礎上，論證了可靠性管理與電力gis技術結合的可能性，創立了在簡潔的人機圖形界面下利用空間數據建立網路結構模型及可靠性計算模型的方法；通過建立網路可靠性計算系統，進行了計及變電所檢修影響、切換開關、 t接點及雙回線供電情況下的可靠性指標計算分析，對油田電網及變電所（線路）的改（擴）建方案、增強性措施及接入系統的可靠性給予了工程評估，為電網規劃、設計及日常的設備管理提供分析決策依據。
  18. The subjects of this paper are the realization of speed - sensorless fast point - to - point position orientation system and to analyses the properties of state estimator based on extended kalman filter ( ekf ) for field - oriented controller ( foc ) system of induction motor

    本論文的研究目標一是用bang - bang控制思想實現無速度傳感器點對點快速定位系統，二是分析基於擴展的卡爾曼濾波器（ ekf ）異步電機閉環矢量控制系統狀態估計器的性能。
  19. The paper carries on the research of network topology, algorithm of state estimation and detection and identification of bad data, and applies the method of tracking search to network topology, semi - dynamic optimization to node numbering, algorithm of weighted least - squares with constraints to state estimation and rn to detection and identification of bad data. the calculation is made for jinzhong ' s electrical network according to its circumstances in shanxi

    本文對電力系統狀態估計理論中網路拓撲分析、狀態估計演算法、不良數據的檢測與辨識進行了研究，採用獨立於結線方式的跟蹤搜索法進行網路拓撲分析、半動態優化技術進行節點優化，帶約束加權最小二乘法進行狀態估計計算，標準化殘差進行不良數據的檢測與辨識。
  20. On practical occasions, censored test is used, small scale sample test theory and extensive sample strategy are applied, together with point estimation, estimation of lower limit value for reliability in certain confidence and bayes method based on ? ii ? abstract prior reliability information of the old system are adopted to estimate and veflf ~ ? the new system ? reliability

    根據現場具體情況，採用截尾試驗方法，應用小子樣試驗理論，採用擴大樣本量策略，利用點估計、在一定置信度下系統可靠度下限估計和以原有系統可靠性信息為先驗信息的bayes法對系統的可靠性進行估計和驗證。
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