查询词典 covariance

Another way infixing R2 into the M-V model results in violating the restriction of the M-V models, which the covariance matrix must be positive definite matrix, and then leads the performance of the portfolio to be worse eventually.

而另一种方式权重配置方式，将R2嵌入M-V模型方式所得出的结果，则违反了M-V模型的限制条件之一，即所变化后的共变异矩阵违反了正定的限制，最后使得投组的绩效变差。

Based on the scatted data , a suitable method has been proposed in this paper , in which the least eigenvector of covariance matrix for the local data points is used as the normal vector of the data .

这里针对散乱测量数据点云，以局部数据点协方差矩的最小特征向量作为数据点的方向矢量，并根据实际测量情况，对基于二次曲面拟合的数据点曲率估算算法进行了改进。

The data was analyzed by chi-square,stepwise regression analysis and covariance statistics.

资料用卡方检验、逐步回归和协方差分析等。

Based on the measurement of carbon flux by the methods of eddy covariance and static chamber/gas chromatogram, a comparison was made between the two methods in evaluating ecosystem respiration over winter wheat-summer maize double cropland and Kobresia humilis alpine meadow.

基于涡度相关法和静态箱／气相色谱法的碳通量观测数据，对比分析了两种方法在评价禹城冬小麦－夏玉米复种农田生态系统和海北高寒矮嵩草草甸生态系统呼吸中的差异。

Our model is suited to the statisticalanalysis of covariance and could potentially be used to comparethe effects of covariants on labor pain and the rate of changeof pain.

该模型适用於统计分析影响因素的协方差，并可用於比较各影响因素对产痛及其变化的影响。

Second,normals and curvatures of vertices in the optimal neighborhood are estimated by covariance matrix analysis.

实验结果表明，多边滤波器在有效地去除噪声的同时，还能较好地保持点模型表面的几何特征。

Since the gauge covariance of the original system are kept in every step of calculation process, we apply the techniques to calculate the quark propagator in presence of an arbitrary gluon field is calculated gauge and Lorentz covariantly and a consistent result is obtained.

鉴于此方法在计算过程的每一步都保持了系统原有的协变性，我们应用它计算了含有胶子场的规范和洛仑兹协变的夸克传播子。

Covariance analysis ; constant of earth gravitation

协方差分析；地球引力常数

The experimental group received 10 weeks of walking exercise training, at 50 minuets per session, 5 days per week and at a exercise intensity limit between 60% and 70% maximum heart rate. The control group received ordinary special education curriculums. All participants completed three times of the PACER（Progressive Aerobic Cardiovascular Endurance Run）20-Meter Shuttle Run test and test for the average walking speed during 1600 meters:before the experiment started , after the experiment and the follow-up test at the fourteenth week of the experiment started. All results from these tests were recorded and analyzed by descriptive statistics; repeated measure t-test; the one way analysis of covariance .

实验组进行星期一至星期五每天一次，合计每周五次，每次50分钟，总共10周，运动强度为60％-70％最大心跳率的步行运动；控制组接受学校安排的特殊教育课程，两组学生在进行步行运动前、后以及实验处理结束后第四周，分别接受PACER渐进性心肺耐力跑-20 公尺和1600公尺的步行速度之测验，并将所得的成绩以描述性统计、重复量数t 考验、单因子共变数分析进行统计考验，评估实验处理之运动与维持成效。

Based on moving least squares surface, the differential properties of each sample point on PSO are first evaluated. In terms of covariance analysis, the elliptical splat of sample point is then determined on its tangent plane. Finally, the splats are rendered from far to near by using elliptical weighted average filtering. According to the differential properties, moreover, the suggestive contours of PSG are attained so that non-photorealistic rendering of PSG is realized.

首先根据构造的移动最小二乘曲面计算采样点的表面几何属性，然后根据协方差分析确定点元在其切平面上的椭圆表示，最后采用椭圆加权平均滤波从远到近单遍绘制各点元，此外，根据表面几何属性确定点模型的轮廓线，实现了点模型的非真实感绘制。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了