條件方差 的英文怎麼說

中文拼音 [tiáojiànfāngchā]
條件方差 英文
conditional variance
  • 條 : Ⅰ名詞1 （細長的樹枝） twig 2 （條子） slip; strip 3 （分項目的） item; article 4 （層次; 秩序; 條...
  • 件 : Ⅰ量詞（用於個體事物） piece; article; item Ⅱ名詞1. （指可以一一計算的事物） 2. （文件） letter; correspondence; paper; document
  • 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...
  • 條件 : 1. （客觀的因素） condition; term; factor 2. （提出的要求） requirement; prerequisite; qualification
  • 方差 : dispersion
  1. Taxus chinensis vsr. mairei population is very oblivious from seeding stage to mature tree stage. the patterns were consistant with the ecological and biological characteristics of form. taxus chinensis var. mairei which were valuable and rare and in severe danger. in this paper, logistic model and liu - logistic model were proposed to approach the growth dynamics of tree basal area of form. taxus chinensis var. mairei population

    南方紅豆杉幼苗表現為較強的聚集分佈，除與種子的散布有關外，生境條件的差異是重要原因之? ，其它發育階段表現為明顯的隨機分佈，表明它在自然群落中分佈的概率很小，反映了南方紅豆杉珍稀瀕危的生態生物學特性和特徵。
  2. In this paper, a quasi - residuals - based estimate is given and asymptotical properties is obtained

    使用該方法的關鍵點在於能出條件協差陣一個較好的估計。
  3. Based on the rv - arma model, it is discussed that the persistence of conditional variances has a effect on capital asset pricing model ( capm ) from persistence viewpoint

    在「已實現」波動自回歸移動平均模型基礎上，從條件方差持續性的角度，討論了條件方差的持續性對資產資本定價模型的影響。
  4. Aimed at the shortcomings of connecting traverse accuracy calculation formula in using, this paper, using adjustment of condition equations method, gives out a group of strict formula, which can be applied to arbitrarily shape connecting traverse error calculation

    摘要針對現有附合導線精度計算式在使用上的不足，運用條件平差方法，推導出適合任意形狀附合導線誤差計算的嚴密公式。
  5. With the experiment part, the errors of sk - 21 nc machine tool have been measured, and a serial of data is gotten which lead to the error discrimination. ( 3 ) based on the kinematical theory of mbs, the calculation methods for the ideal center envelop curve of grinding wheel on cam grinding, the practical cutter track, inverse contour of cam, ideal nc instructions, precision nc instructions, the inner / outer normal and the fitting criterion of curve have been all discussed in detail in this paper

    （ 3 ）通過精密加工的約束條件方程，探討理想刀具路線、逆變數控指令與實際刀具軌跡之間的映射關系，解決誤差補償技術提高加工精度的核心問題? ?當要求數控磨床的砂輪中心準確到達給定的理想點時，精密數控指令值究竟該是多少，如何能夠通過計算，獲得這樣的數控指令值，給出經修正的數控指令計算方法。
  6. In the is95 protocol, because of the different rate in the wireless communication system, a symbol repetition is used to adjust the frame length to the same. in the scheme proposed in this paper, a symbol

    模擬結果表明，當通道條件較差時，在使用同樣多的比特的情況下，本文提出的方法對圖像的傳輸有明顯的改進效果。
  7. The novel three - dimensional finite - difference approximations of mur ' s absorbing boundary conditions are also presented in frequency - domain. then the ddm based on fdfd is investigated in the applications of three - dimensional electromagnetics problems. and it is used to analyze the leaky wave antenna based on image nonradiative dielectric ( nrd ) guide

    最後，闡述了maxwell方程組和劃分區域的despres傳輸條件的頻域差分格式建立，在截斷邊界上構造了三維頻域mur條件的差分近似，探討了基於頻域有限差分的區域分解法在三維電磁問題中的應用實現，並將該演算法用於分析一種基於nrd波導結構的漏波天線。
  8. In the application of pp plots, unconditional variance distribution of logarithmic return and arch type models are tested

    在pp圖的應用中，檢驗了對數收益的無條件方差的分佈和arch類模型。
  9. Finally, the realistic meaning of persistence character of conditional variances in finance analysis is discussed

    最後討論了條件方差持續性質在金融分析中的現實意義。
  10. Based on the rvarma model, the empirical analysis points out the facts that the conditional variances have a persistent effect on capital asset pricing in model with root

    給出了基於「已實現」波動自回歸移動平均模型的實證分析，指出當模型具有單位根時條件方差對資產定價的影響是持續的。
  11. The autoregressive conditional heteroskedastic ( arch ) class of models for conditional variances was put forward by engle ( 1982 ) proved to be extremely useful for analyzing economic time series. garch models have been developed to account for empirical regularities in financial data

    Engle （ 1982 ）提出的arch模型，對經濟時間序列中的條件方差分析十分有用， arch模型可以很好地刻劃金融數據。
  12. From results we know that correlation of return time series is not obvious, but correlation of the square time series of return, i. e., variance time series, is clear. so we use garch model to estimate conditional variance, and calculated parameters in model by the way

    應用相關性分析，得出了收益率序列之間不存在明顯的序列相關性，而收益率平方序列存在顯著的相關性，即方差序列存在相關性，因此我們使用g刁rch模型建模來估計條件方差，計算出了模型中的相應參數
  13. Making use of the time series exhibitions of the fluctuation - rate datum, we make our study for the following two purposes : one is to observe whether the preannouncing companies " temporal - condition variance of the series of the return rate conforms to the demand of sta bility ; the other is to decide whether the preannouncing companies " stocks have asymmetrical - information adjustment, this is to say, to decide how the companies response to good or bad news

    為了進一步檢驗盈餘預告新規則實施效果，我們考慮從波動性入手對股票市場的穩定性進行系統分析。我們嘗試利用波動率數值的時間序列表現進行研究，力圖了解：預告公司股票日收益率序列的時變條件方差是否滿足穩定性要求。預告公司股票是否存在信息非對稱性調整現象，即對利好利空消息分別做出何種反應。
  14. A new computational formula to nonlinear adjustment by parameters, in consideration of the second - order terms, is derived in this paper from the precise orthogonality condition equations to nonlinear least squares by analyzing the direct solving process and iterative computing method of the linearized model

    在分析線性化的非線性參數平差的近似直接解法與迭代解法基礎上，利用非線性最小二乘的精確正交性條件方程，推導出顧及到二次項的非線性參數平差的一種新的計算公式。
  15. The error compensation software for cam precision grinding has been developed, and results show that the cam grinding accuracy can be ensured and the productive can be improved. ( 1 ) by using the method of movement error analysis of mbs, the geometric error model of sk - 21 nc machine tool has been established, and the calculation equation for precision processing of nc machine tool has been derived, which lays a good foundation of programming the error compensation software

    基於該磨床目前的狀態和已有的研究成果，本課題展開了以下主要研究工作: （ 1 ）以多體系統運動學理論為基礎，建立精確的sk - 21數控凸輪磨床運動模型，全面考慮各項結構誤差和運動誤差對加工精度的影響，推導出精密加工約束條件方程，揭示機床實精密加工的實質。
  16. Contamination of water supplies is usually due to poor sanitation close to water sources, sewage disposal into the sources themselves, leakage of sewage into distribution systems or contamination with industrial or farm waste

    水源的污染通常是由於接近水源的地方衛生條件太差而造成的：污水排入水源，污水滲入給水系統或工農業污水造成污染。
  17. Contamination of water supplies is usually due to poor sanitation close to water sources, sewage disposal into the sources themselves, leakage of sewage into distributions systems or contamination with industrial or farm waste

    水源的污染通常是由於接近水源的地方衛生條件太差而造成的：污水排入水管，污水滲入給水的系統或工農業污水造成污染。
  18. L38 ： contamination of water supplies is usually due to poor sanitation close to water sources, sewage disposal into the sources themselves, leakage of sewage into distributions systems or contamination with industrial or farm waste

    水源的污染通常是由於接近水源的地方衛生條件太差而造成的：污水排入水管，污水滲入給水的系統或工農業污水造成污染。
  19. 5. translocation and distribution pattern of ions in the rhizosphere soil of crops were different remarkably with respect to different re treatments and culture condition

    5因不同處理及旱作和淹水條件的差異，作物根際離子的遷移方式有較大不同。
  20. The results showed that the extension organizations set up within administration area could not meet the needs of agricultural development in regional based and lack of operational mechanism of motivation and responsibility in market orientation ; the structure of knowledge, specialty structure and age structure of extension staff were not rational in terms of farmers needs although the staff qualification have been improved and the total number of staff have been reduced according to the requirement. in financial support, the financial support mainly from government and the amount of funds was various from year to year

    研究表明，近年來基層推廣機構總數呈減少趨勢，按行政轄區配置的推廣機構難以滿足煙臺市農業快速發展的需要，並且普遍缺乏市場機制、激勵機制和風險責任機制;農業推廣人員總數呈減少趨勢，人員隊伍日益精幹，推廣人員整體素質得到了提高，但在知識結構、專業結構、年齡結構等方面與基層農民的現實需求仍有不小的差距;基層推廣機構基本設施條件較差，推廣手段落後，不能滿足煙臺市現代農業的發展需要。
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