力学

On the basis of the introduction and analysis of the history, current situation and development of explosive synthesis of superhard materials, the mechanism and technology of diamond and dense boron nitride synthesis by shock compression and some explosive mechanics problem in explosive synthesis have been studied systematically in this research.

本文在对超硬材料爆炸合成研究的历史、现状及发展趋势进行评介、总结与分析的基础上，以金刚石、高密相氮化硼为研究对象，对爆炸合成理论与技术，以及爆炸合成中所涉及的一些爆炸力学理论问题进行了较为系统的研究。其主要研究成果如下

Discover the 3Cr23Ni8Mn3MoN organizes of indoor temperature after passing by the heat temperature , the mechanics function of the heat temperature bottom and the anti-corrosion the function is better than the 4Crl4Nil4W2Mo and 5Cr21Mn9Ni4N.

研究发现3Cr23Ni8Mn3MoN钢经热处理处理后的显微组织、常温及高温下的力学性能和钢的抗燃气腐蚀性能均优于4Cr14Ni14W2Mo及5Cr21Mn9Ni4N钢，能较好地满足排气阀的性能要求。

From these results mentioned above, we discussed the anomaly sources of the Bouguer gravity field, the lithospheric rheological properties, the crustal density distribution of the Tibetan

利用所得到的上述一些结果，我们对青藏高原区域布格重力异常源、岩石圈的力学特徵、密度分布等问题进行了讨论，并对其包含的地球物理及地球动力学含义进行了进一步的探讨。

Cylindrical boult of flour mill,mechanics model,offsetting poor alignment

中文关键词：面粉机圆筒筛，力学模型，错位配合

This paper takes the cylindrical boult of the 40 flour mills as the object of study,establishes the corresponding mechanics model ,connects theory to reality,designs the nut conicity,then uses the same conicity offsetting poor alignment between the nut and the cylindrical boult,decomposes reinforcingsteel radia.

以40型面粉机圆筒筛为研究对象，建立相应的力学模型，通过理论结合实际，设计螺母锥度，在螺母与圆筒筛之间采用同锥度错位配合，将钢筋的径向受力通过锥面分解到钢筋轴向一部分，使得钢筋在轴向和径向都保持尽可能小地受力。

From the view of fracture mechanics, the problem involving a center crack in a rectangular piezoelectric body under anti-plane mechanical shear displacement and in-plane electrical field is analyzed by the boundary collocation method in this paper.

从断裂力学的观点出发，采用边界配置法研究了含中心裂纹的矩形截面的压电材料在平面内电场和反平面变形作用下的应力场和电场的解，详细介绍了该方法的程序设计过程。

Based on the fundamental solution of plane piezoelectric problems and the basic thought of the virtual boundary element method for elasticity, this paper presents a virtual boundary element-equivalent collocation method for plane piezoelectric materials.

利用压电材料平面问题的基本解和弹性力学虚边界元方法的基本思想，提出了压电材料平面问题的虚边界元-等额配点解法。

The boundary contour formulations of evaluatingstresses from the Somigliana stress identity are derived for 2-D problemswith quadratic boundary elements.The boundary contour method basedon the traction boundary integral equation is further discussed.Elasticproblems are first solved using the traction boundary contour method.Amixed collocation of the displacement boundary contour formulation andtraction boundary contour formulation is given.(4)The dual boundarycontour method is developed for the analysis of crack problems.

3建出了Somigliana应力积分式的二维和三维问题的边界轮廓法理论；给立了二维问题由Somigliana应力积分式计算应力的二次形函数的边界轮廓法方程，进而给出了基于面力边界积分方程的边界轮廓法；提出了一种以位移边界轮廓法方程与面力边界轮廓法方程混合配置的方案，首次实现了用两种积分方程相结合来求解弹性力学问题。

The direct methods to solving the boundary condition problems of elastic mechanics are introduced in the present work.

本文的工作提供了直接求解弹性力学边值问题的一个新思路。

The main purpose of the dissertation is to introduce the concept of "generalized parameter" to the Boundary Element Method.

本文的创新点在于尝试将"广义参数"的概念引入到边界元法的分析中，尝试探寻边界元法求解断裂力学的新理论和新途径。

They go to town. Would you just ask them?

他们在城里你能问他们吗？

Ossein pretreated for a2 weeks period exhibited the maximum% yield incase of bone gelatin, while the yield from intact skin was higher than that realized incase of de-scaled skin.

预处理时间达2星期的骨胶原表现出最高的骨明胶百分产量，然而从未处理鱼皮中得到的产率比去鳞的鱼皮得到的要高。