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- fourth order statistic 四阶累计量
- The elastic moduli Eijlm represents a tensor of the fourth order. 弹性模数Eijlm表示一个四阶张量。
- Concretely,the fourth order squeezing of the light field iis studied in detail. 我们详细研究了量子光场的四阶压缩特性,给出了四阶压缩的条件。
- SSA method is based on two order statistic, what the method reflects is the linear correlation on spacetime of signals. 奇异谱分析方法是基于二阶统计的方法，反映的是信号时间上和空间上的一种线性相关关系。
- We introduce the mean square error (MSE), image entropy and high order statistic to analyze defocus models. 摘要针对常用的离焦退化模型，引入图像均方差(MSE)、图像熵及高阶累积量3种分析评价方法。
- The chain consists of a dual-mode,highly linear,fourth order Chebyshev active RC filter and three VGA stages. 基带由双模的高线性度的四阶切比雪夫形式的有源RC低通滤波器以及三级可变增益放大器构成。
- The scattering of time-domain pulse by the ionosphere was calculated using a fourth order (FD)2TD scheme. 采用具有四阶精度的时域有限差分法计算了电离层对时域脉冲的散射，然后应用小波变换求出了反射信号的时频分布。
- The initial boundary value problem of fourth order wave equation with dispersive and dissipative terms is studied. 摘要研究具色散和耗散项的四阶波动方程的初边值问题。
- We discuss the parameter estimation of uniform distribution in a circle. Based on the order statistic, we obtain the estimator and confidence interval of the radius. 摘要研究了圆内二维均匀分布的参数估计，利用次序统计量得到了圆的半径的估计量与置信区间。
- It reduces the problem of solving double harmonic equation to the problem of solving the fourth order Euler equation by applying transformation. 这种方法是用变换将解重调和方程问题化简为解四阶欧拉方程问题
- On those points of fourth order lead which can not receiver the GPS signal, Leica TC1800 was used and achieved precision requirement. 在无法接收GPS信号的四等导线点按照常规方法利用TC1800测量，达到设计精度要求。
- This paper considers the finite difference method for a class of generalized fourth order dispersive and dissipative wave equation. 摘要研究了一类四阶非线性耗散、色散波动方程初边值问题的有限差分解法。
- Update information for order statistics and forecast in time. 及时更新订单情况和预测信息。
- We also extrapolate the expansion arid enhance the accuracy of the eigenvalue from the second order to the fourth order. 然后对误差展开式外推，收敛阶数可以从二阶提高到四阶，得到了高精度的解。
- Using the fourth order Runge-Kutta method, the equation of disorderly coupled pendulums with different simple pendulums is calculated. 摘要利用龙格-库塔法求解了不同单摆构成的耦合摆的运动方程，分析了由两个不同质量的小球组合的耦合摆的运动情况；
- Simulation experiments prove the validity of image entropy and high order statistic, because their evaluation conclusions are same as that by using MSE which is based on reference image. 在最优退化模型分析的仿真实验中，图像熵和高阶累积量取得了与需要参考图像的MSE一致的结论，从而证实了其有效性。
- With flexible definition of fourth order cumulant of the array output signal, the spectral peak searching is not necessary for the new separable approach. 通过巧妙定义阵列输出四阶累积量矩阵,该方法不需要谱峰搜索就可以估计信号二维到达方向。
- Focused on the asymptotic behaviour of mediant for fourth order Lagrange's mean value theorem and obtained the main results as followed (The equation is abbreviated). 摘要对四阶拉格朗日中值定理中间点的渐近性质进行了研究，得到的主要结果是(方程式略)。
- Time is sometimes called the fourth dimension. 时间有时被称为第四度空间。
- The application of higher- order statistics to analyzing PCG signal is studied. 对高阶统计量方法应用于心音信号分析进行了研究。
