查询词典 mechanics

Efficient nonparametric density estimation on the sphere with applications in fluid mechanics［J］.

核密度估计及其在直径分布研究中的应用［J］。

Based on normal distribution function, fuzzy subordinate function with five terrane geological mechanics parameters and three local physical geography condition parameters is deserved according to this method.

以正态函数为基础，利用该方法确定了5个岩层地质力学参数、3个区域自然地理条件参数的模糊隶属函数形式，形成了山区公路建设场地分类的模糊分类系统和方法。

Based on the eigen theory of elastic mechanics , the Hamilton density functions for various deformation process are obtained by defining the normal conjugate momentum density , and the Hamilton normal equations for elastic body are also given .

Hamilton体系由于其方程具有对称性，在经典力学和量子力学及其场论等领域中发挥了重要作用。Hamilton体系与Lagrange体系的不同之处体现在：它是在相空间，以对偶变量的形式描述系统的运动规律。

The expression of interaction between normal force and friction was deduced on theory of structural mechanics.

应用结构力学理论推导得出传感器解耦的表达式，进而对传感器的结构进行解耦优化设计，消除了正压力和摩擦力的互干扰，并给出了传感器的设计流程图。

Efforts by mechanics to seek more reliable and stronger power led to the invention of the steam engine by James Watt. In 1785 his new steam engine was first used to furnish power for a spinning factory in Nottinghamshire.

机械师努力寻求更稳定，更强大的能源，于是，詹姆士瓦特发明了蒸汽机。1785 年，在诺丁汉郡，詹姆士瓦特的新蒸汽机首次为纺纱厂提供动力。

Mechanics of explosion ; dynamic response ; dynamic effect coefficient ; numerical simulation

爆炸力学；动力响应；动效系数；数值模拟

With the development of computer technology and computational mechanics, more and more numerical value computation methods are used on vehicle crash analysis.

随着计算机技术和计算力学在车辆安全领域的应用和发展，越来越多的采用数值计算的方法来处理碰撞问题。

The computation of matrix exponential which ties up structural mechanics and optimum control is one of the extensive topics in numerical mathematics.

矩阵指数计算与力学计算中的动力学问题、最优控制的计算问题等密切相关，是数值代数里研究得最为广泛的课题之一。

The contents of this course include: the mathematical basis of FEM, the generic solution principles and expressions of elastic mechanics issue, the construction of element and its interpolation function, iso-parametric element and numerical integral, solution of linear equations, some practical issues of FEM modeling, brief introduction to typical commercial FEM packages, FEM for truss, plate blending and shell, and FEM for heat exchange and dynamics.

课程内容主要包括：有限单元法的数学基础、弹性力学问题有限单元法的一般原理和表达格式、单元和插值函数的构造、等参单元和数值积分、线性方程组解法、有限元建模的若干实际问题、典型商用有限元分析软件简介、杆件结构力学问题的有限单元法、平板弯曲问题的有限单元法、一般壳体问题的有限单元法、热传导问题的有限单元法、动力学问题的有限单元法等。

The concept of adiabatic approximation and adiabatic invariant came from research on obit deformation in classical mechanics.

然而一直以来，物理学界对QAT的适用性问题上都存在一些模糊的认识。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。