查询词典 variation method

The finite-difference method of calculation on primary wave traveltime based on any rectangular grid and a local plane wavefront approximation has high precision and can apply to complex media with violent velocity variation.

基于任意矩形网格和局部平面波前近似的有限差分初至波走时计算方法精度较高并适用于强纵横向变速的复杂介质。

This dissertation establishes numerical methods in structural analysis on the basic of variation principle, finite member element method, spline function, etc.

本文利用变分有限元法、样条函数等，提出了薄壁箱梁结构分析的数值理论和方法。

The principle variation of beam deflection is calculated with two variable parameters: the initial speed and the acceleration of moving mass, using the solution method of time-variant mechanical system.

利用时变力学系统的求解方法，得到在移动质量的初速度和加速度两个运动参数变化情况下，梁的挠度变化规律。

Based on the virtual displacement principle of finite element method, a weak variation of GAO-YONG turbulence equations is put forward. The subroutine of the element and the integrated finite element code are generated by the finite element program generator successfully.

基于有限元方法中的虚位移原理，写出了不可压流Gao-Yong湍流方程组弱形式的微分方程表达式，利用有限元程序自动生成系统得到了全部有限元计算程序。

In view of the probability integral method in prediction of mining subsidence,the paper analyzes the errors of movement and deformation values resulted from the errors of primary prediction parameter s, and analyzes the corresponding regularity of variation and relations.

针对开采沉陷预计中的概率积分法，分析了由于主要预计参数的误差而导致移动变形值的误差，并且分析了其对应的变化规律和关系。

To the condition of deviation from side path when vehicles are turning and braking, according to the deviation distance, the control strategies and control algorithms of vehicle braking stability by two control methods, yaw moment and active steering, are determined. The fuzzy controller are designed whose outputs can be adjusted online according to the variation of slip rate and dynamic proportionality factor. The simulation results prove that the method of fuzzy control which is based on the yaw meoment and front wheel active steering can improve vehicle braking stability and ability of path tracking.

针对汽车在转弯制动时出现的侧向路径偏离状况，根据偏离量大小，利用横摆力矩和主动转向两种控制模式分别进行汽车制动稳定性控制，确立了两种控制模式下的控制策略和控制算法，设计了模糊控制器，根据轮胎最优滑移率变化状况，对模糊输出变量论域的大小按照动态比例系数进行实时在线调整，仿真实验验证了所提出的基于横摆力矩和前轮主动转向的模糊控制方法能提高汽车制动稳定性和路径跟踪能力。

Model based method has been under more and more investigation because it's robustness and adaptation to the random factor variation of the nature.

统计模型方法由于其鲁棒性和与事物随机变化因素的相适应性而受到越来越多的关注。

We established a method for quantitative analysis of methyleugenol and safrole in Asarum hete rotropoides by GC to study their season variation.

对北细辛不同生长期所含甲基丁香酚和黄樟醚用气相色谱法进行了定量分析。

Usingthis method, the GSH content of Rana nigromaculata tadpoles under different concentrationsof Na2SeO4 and Na2SeO3 were measured. The induce of selenate to the content of GSH intadpoles makes its variation has well time-effect and dose-effect relationship. Thesephenomena demonstrate that GSH is smart to the exposure of selenate, and therefore can beused as a sensitive index to selenate pollution.

采用本法测定黑斑蛙蝌蚪在Na_2SeO_4和Na_2SeO_3不同浓度不同时间暴露染毒下机体GSH含量，硒盐对蝌蚪GSH的诱导使其变化具有较好的时间-效应及剂量-效应特征而表现应激反应提示蝌蚪GSH可对硒盐暴露作出快速灵敏的反应可作为监测硒污染的敏感生物标记。

Finally, applying the current basis function of three-term sinusoidal expansion, the radiation characteristic and input impedance of the vertical and horizontal antennas above lossy ground are analyzed by the method of moments with the variation of frequency, height from the ground and ground parameters.

最后，用矩量法，采用正弦插值基函数，研究地面上方垂直、水平线天线的辐射特性和输入阻抗随着频率、离地高度、地面参数等变化的情况。

I will endeavour to find you some assistance.

我尽力帮你找人帮忙。

At first I only know bruck is the idol of American younglings, afterwards I returned back to Taiwan ,even in Beijing last year ,I saw her poster everywhere, I was so surprised at her charm.

起初我只晓得布鲁克雷德丝是美国少男少女崇拜的偶像，后来回台湾，甚至去年在北京，居然也四处看见她的海报，才惊讶她的魅力之大。