半方差,semi-variance英语短句,例句大全

半方差,semi-variance
1)semi-variance半方差
1.Weighted semi-variance risk measuring model for portfolio investment;加权半方差风险度量模型
2.The results show: i) the mean semi-variance of moso bamboo population is 0.为了增加对竹林生态系统认识,应用地统计学中的半方差、半方差理论模型模拟、分形维数及其与竹林结构部分因子相关分析,研究毛竹种群空间格局特征。
3.On the contrary, N has a smaller spatial variability, soil nutrient had semi-variance structure, a.结果表明,土壤养分性质均存在着空间变异性,速效磷、速效钾和有机质变异相对较大,碱解氮变异亦小;土壤养分性质均存在半方差结构,分别拟合Exponential、Gaussian、Pentaspherical、Gaussian模型;碱解氮、速效磷、速效钾和有机质均显示中等的空间相关性。

英文短句/例句

1.The Comparison of the Risk Measuring Methods Based on the Semi-Variance and Variance基于方差与半方差的风险刻画方法比较
2.Research on the Method of Image Matching Based on Semi-Variance Function;基于半方差函数的影像匹配方法研究
3.Futures Hedging Model Based on the Smallest Negative Semi-variance;基于最小负半方差的期货套期保值优化模型
4.A Risk Measure Model for Investment Project Based on Semivariance;基于半方差的投资项目风险度量模型研究
5.The Portfolio Management Analysis Based on the Expectation-Semivariance Risk Model;基于半方差风险计量模型的组合投资分析
6.An Empirical Comparison and Improvement Study on Semi-Variance Risk Measure Model;半方差风险计量模型的实证比较及改进研究
7.Research on Potrfolio Investment Models Under Semi-Variance Risk;负半方差风险下的证券组合投资模型研究
8.The Optimization On the Mean Dynamic Downside Semi-Variance Multiperiod Portfolio Selection均值-动态下半方差多阶段投资组合优化研究
9.Discussion on the Semiparameter Measurement Model Error Variance;半参数测量模型误差方差求解公式的探讨
10.The method of wave?front aberration for correcting astigmatism in semiconductor laser beams校正半导体激光束像散的波像差方法
11.Research on Digital Halftoning Technique Based on Error Diffusion;基于误差扩散数字半色调方法的研究
12.Optimal Error Estimation on Semi-discrete Solution of Parabolic Equation;抛物型方程半离散解的最优误差估计
13.Oscillatory Criteria for Second-order Half-linear Delay Difference Equation二阶半线性迟滞差分方程的振动准则
14.Inverse halftoning algorithm based on multiscale framework多尺度框架误差分散逆半调方法研究
15.Mean Square Error Approximation for Wavelet-Based Semiregular Mesh Compression;基于小波半规则网格压缩均方误差的近似方法
16.Error Estimates of The Semi-discrete Finite ElementMethod For A Class of Linear Hyperbolic Equations;线性双曲型方程半离散有限元方法的误差估计
17.The additive genetic variance of the same character, estimated from the covariance of half sibs, was 0. 9602.从半同胞协方差估计出来的，同一性状的加性遗传方差为0．9602。
18.A semi-parametric estimation method of systemic errors and covariance matrices in Kalman filter一种Kalman滤波系统误差及其协方差矩阵的半参数估计方法

相关短句/例句

semivariance半方差
1.A Risk Measure Model for Investment Project Based on Semivariance;基于半方差的投资项目风险度量模型研究
2.Through comparative and empirical analysis of the portfolio management based on the mean-variance model (the u-V Model) and (author s) semivariance model (the E-SV Model), this paper clears up obscurity of the u-V Model and the definition of risk and finally sheds light on the application significance of the E-SV Model in portfolio management analysis.通过对马柯维茨的均值—方差模型(theμ-V)和笔者的半方差模型(theE-SV)在组合投资中进行对比实证分析,文章廓清了笼罩在均值—方差模型及其风险定义上的迷雾,使半方差模型在组合投资中的突破性指导价值进一步明晰化。
3.Optimal hedge ratio is estimated under different time scales by taking minimum semivariance as hedge target.本文运用极大交迭离散小波变换对新加坡新华富时A50股指期货合约原始数据进行逐尺度分解,在不同时间尺度下以半方差最小化为套期保值目标对最优套期保值率进行估计,并与最小小波方差套期保值率进行比较。
3)semivariogram半方差
1.In order to make clear the spatial and temporal variation of SO_2 in China,the average annual concentration of SO_2 in key cities of 1990,1995 and 2000 was analyzed based on the geostatistics that mainly include semivariogram and kriging.为反映我国SO2污染的时空演变规律,通过半方差分析和克里格空间内插法,对1990年,1995年和2000年主要城市的SO2年日均浓度进行了空间分析,发现SO2浓度空间分布的结构性在不断减弱,随机性有所增强,并且在总体改善的同时,污染中心有向西部转移的动向。
2.nigra plantation with different densities in the Farm of Xuejiazhuang Village in Datong, Shanxi, China, was estimated by applying the semivariogram theory of spatial statistics.以高空间分辨率遥感影像QuickBird的全色波段为数据源,应用空间统计学半方差理论,对山西大同薛家庄林场不同林分密度的小黑杨人工纯林冠幅尺寸进行估计。
3.Using the panchromatic wave band of high spatial resolution remote sensing image-QuickBird as the data source, the crown of plantation White Bark Pine (Pinus bungeana) with relative high crown closure was accurately estimated by applying the semivariogram theory of spatial statistics.以高空间分辨率遥感影像QuickBird的全色波段为数据源,应用空间统计学半方差理论,对郁闭度较高的人工白皮松林冠幅尺寸进行较为准确地估计。
4)Semivariogram半方差图
5)negative semi-variance负半方差
6)the semi-variance半方差方法