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纳米铜晶胞体积弹性模量变化规律的分子动力学模拟（Molecular Dynamics Simulation for Variation Relationship of Volume-elasticity Modulus of Crystal Cu with Pressure and Temperature）
分子动力学 纳米铜晶胞 体积弹性模量
2009/12/28
用分子动力学的方法详细模拟纳米铜晶胞随温度与压强变化的规律，得到了铜晶胞体积弹性模量突变的敏感压强点。模拟结果表明：单晶铜的在压强小于75 GPa时体积弹性模量随温度升高而降低，随压强增大而增大；在压强大于75 GPa时，体积弹性模量随温度升高而增大，随压强增大而减小。
Geometric displacement volume and flow in the phase of a two-phase hydraulic converter
geometric displacement volume alternating flow two-phase mechanism
2014/2/27
The paper researches the possibilities to replace the parallel flow hydraulic mechanisms in agricultural machinery with hydraulic units with fluid alternating flow as they provide more efficient opera...
Searching the proportional level of operating costs – specification of the minimum volume of production
proportional costs fixed costs over-proportional costs under-proportional costs unit costs break-even point minimum profit, minimum profitability of production variable costs cost-revenue ration rate of profit
2014/3/28
This article concerns the topic of various types of costs and refers to relations between them. It also solves relations between costs and the output in in-kind units, between costs and revenues (in f...