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|  | | 为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。 | |
This method uses the free torsional theory and the principle of virtual work to build governing equilibrium equations involving unknown shear flows and twisting rate.
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There have been obtained system of equilibrium equations and recurrence relations for its coefficients which enable us to formulate the algorithm to build the system.
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The level populations were determined by numerically solving the equation of recombination kinetics together with the statistical equilibrium equations for a 60-level model hydrogen atom.
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A set of phase-equilibrium equations in covariant form and its use for developing a general method of calculation of two-phase c
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The equilibrium equations for dislocations are solved numerically.
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| | In this paper, the differencial form of the Poynting's theory is developed by means of Maxwell' s equations, concerning the electromagnetic field in the air gap of induction machines. The variation and transmit of the radial and tangential energy flow in the air gap of electrical machines are illustrated by analyzing the divergence of Poynting vector. Finally, the change and conversion rules of electrical power going through the areas with or without existing currents are analyzed in detail. Therefor ... | | 本文由麦克斯韦方程出发,结合异步电机气隙内的电磁场推出坡印亭定理的微分形式。通过对坡印亭矢量的散度的分析,阐明了电机气隙中径向能流和切向能流的变化和传递。并详细分析了坡印亭矢量穿过无电流区和有电流区时电磁功率的改变和转换规律,因而由电磁场的精确解导出了异步电机的功率平衡方程式。 | | 文摘来源 | | Generalized Newton-Raphson and Generalized fast decoupled power flow methods are presented in this paper. There are four variables at a bus, P,Q,V,0. In common power flow calculation, two of the bus variables are control variables, and there are only three types of buses, that is, PQ bus, PV bus and slack bus. But in generalized power flow calculation, control variables of a bus can be any combinations of the four bus variables P>Q>V,θ, so the types of buses are generalized, the number of possible combinati... | | 本文研究了广义潮流算法。该算法将各种类型的节点引入潮流计算,并将线路的有功功率给定及无功功率给定作为潮流平衡方程。进而研究了广义牛顿一拉夫逊潮流算法及广义快速分解潮流算法,对IEEE14节点及30节点系统进行了计算,得到了较好的结果。 | | 文摘来源 | | A new type of actuator using functionally graded piezoelectric ceramics can produce large out of plane displacements, reduce midplane stresses and avoid failure from internal debonding or from stress peaks. A functionally graded piezoelectric ultrasound transducer has a broadband frequency characteristic. This study presents a simple and accurate high order theory to examine the electromechanical behaviour of piezoelectric generic shells with thicknessgraded material properties. The displacement component... | | 压电功能梯度执行器能产生较大的位移、降低应力峰值并避免了粘结层带来的问题,压电梯度超声换能器能拓展频带宽度。本文作者提出了一个简单而有效的求解压电梯度薄壳力、电行为特性的高阶理论。设定位移分量为壳厚的线性函数,而电势沿厚度方向为二次分布。考虑了压电作动元的驱动信号不同时所具有的不同形式的电荷平衡方程。应用Fourier级数法得到压电系数沿厚度坐标变化的梯度壳的力电耦合的解析解。所得结果可退化至梁、板等多种特殊情况。利用所得方程分析了一非均匀简支压电层合板,并与三维精确结果作了对比,两者吻合得很好,表明该理论的正确性。最后具体求解了压电梯度圆柱壳的力、电特性,给出了位移、应力、电势沿厚度方向的变化规律。 | | 文摘来源 | |   | | << 更多相关文摘 |
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