边界条件

Combined identifications can be carried out for thermal parameters and boundary conditions etc.

该模型不仅考虑了非均质和参数分布的影响，而且也便于正反演问题的敏度分析，可对导热系数和边界条件等宗量进行有效的单一和组合识别。

Since RKPM is a kind of Galerkin meshfree methods, in this thesis, penaltyfunction method is employed to enforce the essential boundary conditions,trapezoidal rule is used for the approximation of displacement field function, Gaussand Hammer quadratures are applied for the numerical integration of systemequation,self-adapting method is applied for confirming the support of the pointinterpolated.

针对 RKPM 是一种伽辽金型的无网格方法，本论文采用罚函数法引入位移边界条件，用梯形积分法则近似位移场函数，对系统方程进行积分时分别使用了 Gauss 积分和 Hammer 积分，采用自适应的方法确定计算点的定义域。

In integration, explicit formulation has been used with the lumped mass matrix so that it facilitates the calculation of the displacement and ayoids the convergence problem caused by the nonlinearities in material, geom.

数学模型采用物质坐标系中的修正的拉格朗日描述，采取集中质量矩阵，用动力显式积分的方法，使位移计算显式化，避免了由材料、几何、边界条件等高度非线性因素引起的计算收敛问题。

From this studied some important boundary conditions, which affect gas flow distribution in blast furnace, were derived.

作者研究了冷态模型中模拟风口回旋区气流的流动结构，由此确定了一个重要的影响高炉气流分布的边界条件。

Theory analysis of composite subgrade has got behind practice engineering of it in recent years. In correlation code, design and construction of composite subgrade have actual being unsureness for complex of geotechnical conditions.

目前，复合地基的理论研究远远落后于复合地基的工程实践，而我国关于复合地基的相关规范由于岩土材料性质的复杂性和变异性，岩土工程边界条件的不确定性等众多影响因素，使得复合地基的设计和施工留有很大的选择和发挥空间，因此，如何提高复合地基的设计计算精度，满足建筑工程对可靠性、安全性及经济性的要求，是岩土工程人员的当务之急，也是复合地基工程的研究目标和方向。

In this paper, the finite-difference time-domain formation of Maxwell's equation is deduced and coded in perfectly matched layer in three-dimension cylindrical complex coordinates.

在三维柱坐系下推导了完全匹配层吸收边界条件的时域有限差分表达式，从而把 FDTD方法推广到完全三维柱坐标系中。

This paper discusses the methods for treating the connecting rod by finite element analysis.

通过大量的数值试验，对连杆有限元分析的边界条件的处理方法进行了探讨。

Matlab Application of different boundary conditions of Bessel equation calculation of the source.

详细说明：应用matlab对不同边界条件下的贝塞尔方程进行计算的源程序。

The analytical expresses of scattering field are obtained based on the boundary condition of a sheath helix model. The effects of the pitch angle and the electrical size of the helix on the resonant behavior are also investigated. It is shown that the resonant behavior of the forward/back scattering far field only depends on the pitch electrical size and the radial electrical size, and that the turn of the helix has no effect on the resonant behavior.

根据sheath螺线管模型的边界条件获得了散射场的解析表达，同时研究了螺线管在共振状态下电角度及螺间距的影响，表明远场的前后向散射的共振状态只依赖于间隙的电场大小及径向的电场大小，而螺线管的倒转不影响谐振状态。

In cases of several boundary conditions,the critical loads of Timoshenko beam are given and compared with the results of Euler beam.

在几类边界条件下，具体求解了线性弹性Timoshenko梁的临界载荷，并与Euler梁的结果进行比较。

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。