查询词典 method of difference

Trajectory optimization method was applied to compensate coat thickness difference of complex curved surface with concavo-convex structure to improve the uniformity of coat thickens.

为提高曲面上涂层厚度的一致性，采用轨迹优化方法对表面有凹凸结构的复杂曲面的涂层厚度差进行补偿。

It was shown that the dimensionless entropy generation number depended exclusively on Reynolds number and wall-to-inlet temperature difference for a given duct or tube, and the method might help to identify inappropriate enhanced tubes or extended surfaces and assist engineers to design better heat transfer equipment with the criteria assessing the merits of augmentation techniques in connection with energy conservation and exergy destruction according to entropy generation analysis.

结果表明：对于给定的管道，量纲1熵产数只与流动Reynolds数和进口与壁面的温度差有关。利用该分析方法不仅可通过参数分析获得几种强化方式的能量综合利用效果，还可确定合理的流动工况参数、结构参数和合理的强化形式。

On one hand, a new method based on Linear-VariantCoefficient-Difference-Equation for the indication of moving weak target with constant acceleration is proposed.

第一章为绪论，简述了本文的研究背景，对目标检测与识别研究的发展动态进行了综述，并指出了本文的主要研究工作。

Firstly, the approach formulates a cost functional to turn the inverse problem into a constrained minimization problem according to least squares criterion, then the resulting constrained minimization problem is transformed into an unconstrained minimization problem by using a penalty function technique, and then the closed Fr chet derivatives of the Lagrange function with respect to the properties are derived based on the calculus of variations, finally, one can solve the resulting problem by using any gradient-based algorithm and the finite-difference time-domain method.

该方法首先以最小二乘准则构造目标函数，将逆问题表示为约束最小化问题；接着应用罚函数法转化为无约束最小化问题；然后基于变分计算导出闭式的拉格朗日函数关于特征参数的Fr chet导数；最后借助梯度算法和时域有限差分法迭代反演德拜模型参数。

In order to get the numerical solution, the paper devises a three hierarchic implicit scheme which eliminates the strict restriction of explicit scheme, thus, it can be used in more areas. By using the energy estimation method, the convergence and stability of the difference scheme are proved and the scheme is second order convergence for time and space.

对求解方程构造了一个三层隐式差分格式，消除了显格式的稳定性对计算步长的严格限制，使之适用范围更广，并用能量估计的方法严格证明了差分格式的收敛性与稳定性，该格式对于时间和空间均具有二阶收敛性。

The finite difference method is adopted to calculate the temperature field on cross-section of the column, the critical temperature and the critical time, the thickness of fire resisting covering of CFST columns, All of the results were verified by experiments.

简要地介绍了钢管混凝土的耐火性能，分析了影响耐火度的因素以及用有限差分法计算火灾时的构件截面的温度场、构件的临界温度和临界时间、防火涂层厚度的结果。

Phenological observation data of plant communities from 1982 to 1996 at 5 sites and a method for phenological cumulative frequency modeling were used to determine the beginning dates of local phenological seasons and their corresponding threshold values of normalized difference vegetation index in each year.

利用1982～1996年5个站点的植物群落物候观测数据和物候累积频率拟合法，划分各站逐年的植被物候季节，并确定各季节初日对应的当地归一化差值植被指数阈值。

The average rate of use of cyclic difference method realized.

运用循环的平均幅度差分法实现的。

There was statistically significant difference (P＜0.01).CONCLUSION: Intravitreal injection of TA is a safe and effective method for the treatment of cystoid macular edema after cataract surgery.

玻璃体腔注射TA是一种安全有效的治疗白内障术后黄斑囊样水肿的方法。

In this paper,the in- fluence of the coupling aperture on the sound energy decay and coupling constant in the primary room is investigated by means of the finite-difference time-domain method,and the investigation is limited within the low-frequency range.

文中运用时域有限差分法，在低频范围内模拟了耦合窗面积的改变对主厅中不同位置的耦合常数和声能衰减的影响。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。