variance ratio 中文意思是什麼
variance ratio
解釋
變化率-
And understanding and studying the spectral features and variation rules of geo - targets in the experimental area, raising that it is the basis of geo - targets information collection with imaging spectrometer data to understand spectral features and variation rules of geo - targets, realizing that in a great extent spectral - integrated - form - based classification method can remove the phenomenon of " different spectrum with same objects " resulted from reflection ratio curve translation because of the angle change among sensor, targets and observation direction, and the average and variance images can be introduced to solve the problem of two kinds of geo - target with similar spectral forms and much different values of whole reflection ratio. it is suggested that " red edge " range bands of vegetation, which has close relationship with vegetation cover and biomass, is the main characteristic bands and important basis for careful vegetation classification and quantitative retrieval, and pixel - based derivative spectral analysis is very useful for removing the effects of soil background values and quantitatively retrieving vegetation biomass and cover. the remote sense quantitative retrieval model is developed for main appraisable factors of desertification monitoring assessment with imaging spectrometer data and then the applicability of model is analyzed
研究結果如下：首先針對荒漠化地區的地物特徵，對高光譜數據不同波段的數據質量、波段組合進行了評價，提出了適用於荒漠化監測的基本波段選擇集；初步了解和掌握了研究地區的地物光譜特性及變異規律，進一步明確了掌握地物光譜特徵和變異規律是用成像光譜儀數據提取地物信息的基礎；發現了基於光譜整體形狀的分類方法在很大程度上能夠消除由於傳感器、地物目標觀測方向之間的角度變化引起的反射率曲線整體平移的「同物異譜」現象，對于譜形相似而整體反射率的值相差較大的兩類地物，通過引入均值和方差圖像參與分類得到解決；研究還表明在植被「紅邊」范圍內的波段是進行荒漠化監測的主要特徵波段，這些波段與植被生物量和蓋度都有密切的關系，是開展精細植被分類研究和植被定量反演的重要基礎；像元的導數光譜分析可以消除土壤背景的影響，是進行植被生物量和蓋度定量反演的有力工具；建立了荒漠化監測主要評價因子的定量反演模型，並分析了模型的適用性。 -
The method proposed in this thesis do well in solving the problems of multi - damping - ratio - spectra simulation. it is convenient to obtain the pareto optimal solution set of the multi - object question by using implicit parallel genetic algorithms and the method can meet the practical needs for simulating ground motions coinciding with multi - damping - ratio - spectra in seismic design. the crossing rate and variance rate are important parameters of genetic algorithms which affect the rate of convergence, the adapting rate of cross and variation in this paper can auto - adapt and according to stand or fall of current sample, it assures the sample approach to the pareto optimal solution set in fast convergent speed
較好地解決多阻尼比反應譜擬合問題；本文方法通過一次運行就能獲得一組具有集系特性的地震動，在擬合多阻尼比反應譜的人造地震波集系的模擬方面有傳統方法所不能比擬的優勢，產生的人造波或人造波集系可滿足工程抗震設計需要；在遺傳演算法中，交叉概率和變異概率是影響收斂速度的重要參數，本文採用的改進自適應交叉概率和變異概率，可以根據當前樣本的好壞程度來自動地選擇適當的交叉概率和變異概率，以保證演算法始終以較好的速度向pareto最優解集逼近。 -
The coach ' s intrinsic value and extrinsic value could predict 18. 1 % of variance of working ratio orientation, and the intrinsic value could separately predict 38. 3 % and 3. 6 % of working identification orientation and working achievement orientation. 4
3 .教練的內在價值及外在價值能有效預測其工作比重取向的變異量達18 . 1 % ，而其內在價值可以分別預測其工作認同取向及工作成就取向的變異量達38 . 3 %及3 . 6 % 。 -
Specially, based on risk - metric and factor variables, the author discusses multi - factor asset pricing model. in theoretical analysis, the author attempts to release the assumption of index ' s random walk, proves a portfolio selection model suitable for the linear index level moreover, based on assets un - exchangeable, the author brings forward asset pricing models for b - shares, h - shares and non - circulated - shares. the author also brings forward multi - factor asset pricing model based on risk - metric indices, such as coefficient of beta, standard variance, standard semi - variance, average absolute deviation, value at risk, and factor variables, such as circulated market equity, exchange ratio, short - term historical return
在理論分析時，作者嘗試放鬆指數水平滿足隨機遊走過程的假設，推導出指數水平呈線性趨勢的資產組合選擇模型；此外，作者基於資產不可交易這一假設，提出了b股、 h股和非流通股等情形的資產定價模型，並基於系數、標準差、標準半方差、平均絕對離差和風險價值等風險度量指標以及流通市值、換手率、短期歷史收益率等因素變量提出了四因素資產定價模型。 -
In light of market risk, there are sensitivity measurement method and volatility measurement method as well as the concepts about risk measurement, such as variance, duration, 3 - coefficient, 5 - coefficient and value at risk. and in light of credit risk, there are accounting - based ratio measurement method and volatility - based measurement method, as well as the related concepts, such as credit rating, z - score, transition matrix, expected default frequency
其中，針對市場風險度量的方法包括靈敏度測量風險方法和波動性測量風險方法，與之相關的風險度量概念有方差、持續期、系數、類系數和在險價值；針對信用風險度量的方法包括基於財務比率的風險測量方法和基於波動性的風險測量方法，與之相關的風險度量概念有信用評級、 z分數、轉換矩陣、違約頻率。 -
This study was conducted to examine the interrelationship of 10 seed vigor traits in 12 wheat genotypes through variance, co - variance and path coefficient analysis, to determine broad - sense heritability, and to estimate genetic advance under selection. the genotypes showed significant difference for all traits, except for percentage of normal seedling. genetic correlation between conversion efficiency of seed reserve, electrical conductivity with other traits were not significant, showed that selection for any of them might be possible without hampering any other traits. however path coefficient analysis indicated that conversion efficiency of seed reserve, seed reserve utilization ratio have strong direct effect in affecting seedling weight, and that mean germination time has significantly negatively correlated in affecting gi. moderate to high estimates of broad - sense heritability, genetic coefficient of variation and expected genetic advance were obtained for electrical conductivity, germination index, mean germination time, seed dry weigh, seedling dry weigh, seed reserve depletion ratio indicating the possibility for improving these traits
本研究利用12個普通小麥品種對10個種子活力性狀的遺傳變異和相關研究，表明除正常幼苗百分率外，其餘種子活力性狀在品種間均存在顯著的差異.種子貯藏物質轉換效率、電導率兩個性狀間及與其它性狀均無顯著的遺傳相關，因此對他們的選擇不會影響到其它性狀.通徑分析表明幼苗干重主要取決于種子貯藏物質轉換效率、種子貯藏物質利用速率;發芽指數主要由平均發芽時間決定.電導率、發芽勢、幼苗干重、種子干重、發芽指數、種子貯藏物質消耗比率6個性狀表現中到高的遺傳力、遺傳變異系數和相對遺傳進展，指明通過遺傳育種手段改良這些性狀是可能的 -
The multi - aptitude body uncertain composed methods are used to deal with the historical data and forecast ways in which the minimum variance hedge ratio is calculated synthetically ， in order to foster calculational reliability of the minimum variance hedge ratio in hedging of stock index futures the mathematical hedging model which is consists of
本文利用多智能體系統不確定性結論合成方法（ mabm ） ，將股票指數期貨套期保值最小風險保值比率計算的歷史數據分析法和預測法進行了綜合處理，進而提高股指期貨最小風險保值比率的可靠性。基於資本資產的定價模型建立由 -
The test result shows that we got the optimum emulsified diesel oil of definite mixing ratio by variance analysis of power smoke and consume oil
以發動機功率、耗油率和煙度的綜合評價值為指標進行方差分析，優選最佳的乳化油配比方案。 -
With the perspective of risk transferring, this thesis focuses on discussing the reinsurance optimization model under mean - variance principle, utility theory and sharpe ' s ratio, their meanings, basic ideas and conditions applicable. at present, china has been a member of wto
從原保險人利用再保險轉移風險的目的出發，本文集中討論了均值方差原理、效用原理及夏普比率（風險收益比率）下的再保險最優化模型，三種原理的含義、基本思想及所適用的條件。 -
In the plate region of a vehicle image, the gray value varies frequently in cross - direction, so we define a parameter ". cross variance " to describe it. we also calculate other parameters to approximately locate the plate, they are the space length between two chars, the thickness of stroke, the peak and trough of gray value, the ratio of width and length, etc. at last, we exactly locate the plate by the theory of mathematical morphology
該方法根據圖像車牌區域橫向灰度值變化頻率比較大這一特徵提出了橫向方差參數，並結合車牌的字元間距、筆劃粗細、灰度峰谷值、長寬比值等特徵粗定位車牌，在車牌的精確定位中利用了數學形態學的方法。我們從某高速公路收費站實地拍攝的照片中選取了1000多幅作為實驗樣本數據。 -
We empirically test the return serial correlation of shanghai stock market under the vr ( variance ratio ) test framework. we suggest that the test results of index and individual stocks are consistent with the exist results. the index return is positive serial correlation and individual stocks returns are weakly negative serial correlation
2 .我們使用高頻交易數據，在方差比檢驗的框架下檢驗了上海證券市場收益率的序列相關性，我們發現在市場指數和個股樣本方面的檢驗結果與以往的研究結果存在一致性，即指數收益率存在正序列相關性，而個股收益率存在弱負序列相關性。 -
In the last part, simultaneously analyzed three types of weak - form market efficiency tests - auto regression, run tests and variance ratio test for various data frequencies, perform the tests on both the shanghai and shenzhen markets for a period of more than six years
第三章中，本文運用自回歸、遊程檢驗和方差比檢驗三種模型分別對我國上海股票市場和深圳股票市場的弱式有效性進行分析。 -
The model considered availability of multiple machines of the same type, processing times and batch information, and the objective function was to minimize the statistical variance of the ratio of loading to capacity in each cell
模型中考慮了同類設備的可重用性、工時信息和批量信息，目標函數為最小化各單元之間的負荷能力比。 -
Markowits e - v model is founded on two assumptions : risk averting and none satisfaction. mean of return ratio and variance of return ratio are the two indexes used in the model
單指數模型是假定每一種證券的收益（或多或少的）與一個指數水平相關而建立起來的收益與這種指數的線性關系。 -
Analysis of variance for correlation ratio
相關比方差分析 -
A algorithm of shot coarse classification is proposed, firstly, key frames are extracted in equal interval in a shot ; then for a frame, dominant colors are obtained by hue, furthermore, the variance of dominant colors and ratio of clustered colors are computed, by which the corresponding frame could be classified into playing or non - playing frame, finally, a shot could be classified by the percentage of playing frames
2 .在鏡頭粗分類中，首先在每個鏡頭內等間隔地提取關鍵幀，隨后得出主顏色序列，並對主顏色序列進行方差統計和聚類顏色比率的計算，最後依據比賽幀比率來進行鏡頭分類。 -
This paper finds out the mean value and variance of load sequence in a period of time based on statistics and then works out the bias ratio of every point in load sequence using corresponding calculation formula and at the same time compares it with threshold value so that " unhealthy data " can be removed and accurate and effective load forecasting can be ensured
本文利用統計學的方法，求出某段時間內負荷序列中的均值與方差，再利用偏離率的計算公式計算出負荷序列中每一點的偏離率，並與閾值相比較，從而除去「不良數據」 ，為準確有效地進行負荷預測提供了保證。
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