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By means of similar simulation, lateral abutment pressure distribution and concentration degree which at the face of the upper coal, the distance between peak stress and coal surface, the influence circle of abutment pressure, and the transfer and weakeni
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摘要采用相似模拟的方法，以平顶山八矿己二采区己15和己(下标16-17)煤层实际地质资料为基础，分析了近距离煤层上煤层开采时，在上煤层采场两侧向的支承压力分布及集中程度、峰值距煤壁的距离、支承压力的影响范围；一定范围内底板中集中应力的传递及渐衰减特征。 |
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By means of simple properties of probability, a class of algebraic inequalities is proved and some known results are consolidated.
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摘要仅借助于概率的简单性质简洁地证明了一类代数不等式，并加强了某些已知结果。 |
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By means of some advanced measure techniques,such as Differential Thermal Analysis(DTA),Sweep Electron Mierosope(SEM), the mecha nism of drying, core bonding and water-solution of this core are approached.
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较详细地介绍了应用差热分析，电镜分析等近代测试手段，探讨制芯材料在烘干时的硬化过程，获得干强度的粘结机理以及水溶性机理的情况。 |
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By means of studying the structural dynamics optimization design that takes the displacement of physical measurement of structural response under motivated excitation as the target or constraint and utilizing the analytical method, the sensitivity computa
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摘要通过研究在动力激励下结构响应的物理量位移为目标或约束的结构动力学优化设计，利用解析的方法，推导出动力位移响应灵敏度计算公式，并成功地移植到有限元程序中。 |
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By means of the assembly of load carrying units which consist of central panel points, cross coupling beams, triangular braces and cored slabs as well as the free layout of interior supporting columns, a new large space three directional composite single
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摘要利用中心节点、交叉梁、三角形拉杆和空心板所构成承力单元的组合以及内部支承柱的自由布置，本文提出了一种新型大空间三向组合平板网架结构。 |
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By means of the chemical composition analysis, mechanical property testing and macro-microstructure examination, EFM calculation and vibration testing, materials and working process are analyzed comprehensitly.
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采用化学成分分析、力学性能测定、宏、微观检验、有限元应力计算及振动测试等方法对再沸器的材料、加工工艺和工作状况进行了综合分析。 |
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By means of the contraction rate of pencil of integral curve, we can study the distribution property of pencil of integral curve.
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借助于相图的路线束收缩率可以更好地认识路线的分布特性。 |
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By means of the data envelope analysis method, this paper appraises and analyzes 15 listed tourism companies' operation efficiency, pure technical efficiency and scale efficiency in 2005.
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论文中利用数据包络分析方法对我国15家旅游业上市公司2005年的运营效率、纯技术效率以及规模效率进行了评价和分析。 |
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By means of the effective potentials and with the phase-plane method, the properities of the orbits of particles in the gravitational field with mass quadrupole moment are studied.
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摘要通过等效势能图，并利用相平面分析的方法，研究了质量四极矩引力场中粒子轨道的性质。 |
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By means of the elasto-plastic finite element method (FEM), the effect of fillets on the stress distribution in Aluminum alloy single lap joints was investigated under the condition of four types of adhesives with different elastic modulus (i.e. acrylate,
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摘要利用弹塑性有限元法，研究四种不同弹性模量的胶粘剂（丙烯酸酯胶、聚氨基甲酸乙酯胶、环氧树脂胶和酚醛树脂胶粘剂等）形成的胶瘤对铝合金单搭接接头应力分布的影响。 |
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By means of the existence and uniqueness of semi-global C1 solution to the mixed initialboundary value problem with general nonlinear boundary conditions for first order quasilinear hyperbolic systems with zero eigenvalues, we establish the local exact bo
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本文利用具零特征的一阶拟线性双曲型方程组带一般非线性边界条件的混合初-边值问题的半整体C1解的存在唯一性,对具一般类型非线性边界条件的二阶拟线性双曲型方程组建立了精确边界能控性. |
