计算能力

Load-carrying capacity of staging of should be calculate by special design,which is from common used single row or double rows falsework.

作为施工时的临时结构，计算方法应简便可靠的确定其承载能力同时保证经济合理。1胎架承载力计算分析1.1胎

This dissertation studies the reliability problem of fault-tolerant computer networks, according to topological structures of networks, the content can be divided into two parts. The reliability of general computer communication networks.

大型复杂网络可靠性计算属于NP问题中最为困难的一类，现有计算机能力直接计算可靠性精确解是非常困难的。

This paper presents a numerical simulation in time domain to investigate the anti-shock performance of marine gear case.

对舰用齿轮箱抗冲击能力进行时域数值模拟，使用MDT软件建立齿轮箱三维几何模型，利用HyperMesh软件进行前处理以及有限元网格划分，并将有限元模型导入ABAQUS软件，对齿轮箱抗冲击能力进行时域计算。

It consists of fitting seismic ray traveltimes and positions to data calculated by ray tracing. In order to improve inversion stability and efficiency, seismic ray is described by Hamilton function and ray tracing is done in phase space. Validation tests on synthetic and practical data are analyzed. The tests show that this tomographic method is effective for estimating velocity field in complex media.

为提高反演的稳定性和计算效率，引入了Hamilton函数描述射线，在相空间计算反演所需的射线路径和目标函数对模型参数的导数，对理论模型和实际地震资料进行了试算，试算表明该方法对复杂介质具有较强的适应能力。

Reservoir engineering calculation of pilot area suggested that Yanshang oil field has good injectivity and productivity. Polymer flooding is suitable.

本文对先导性试验区进行了注采能力得油藏工程计算表明，盐上油藏具有良好的注采能力，进行聚合物驱是可行的。

The coordination effect between lariat crown ether and lariat azacrown ether with alkali metal ions has been analyzed and compared according to the obtained parameters.

运用得到的量子化学计算参数，如前线轨道HOMO能级，LUMO能级等，对碳基臂式冠醚与氮基臂式冠醚与碱金属离子的配位能力进行了比较和分析，结果表明氮基臂式冠醚分子B对碱金属的配位能力要大于碳基臂式冠醚分子A。

Finally, according to voltage with compute the electric current choose once equipments, including circuit breaker, insulate the switch, fuse, voltage transformer, current transformer, lightning arrester, busbar and electric cable and so on, then according to compute the result of the short-circuit electric current with designs the request to once equipments proceed check to break the ability of flowing and stable degrees of short circuit about moving and hot.

最后，根据电压和计算电流选择一次设备，包括断路器、隔离开关、熔断器、电压互感器、电流互感器、避雷器、母线和电缆等，再根据短路电流计算结果和设计要求对一次设备进行断流能力和短路动稳定度、热稳定度的校验。

During the transformation, there are two main forces: modern investment theory and IT. Modern investment theory led investors to accept the idea of risk management. Besides, it brought the instruments measuring risks and pricing risk assets, which promoted market participant to understand derivatives very well. IT provided powerful technical support for massy calculations which is necessary for risk measurement and pricing and for instant reaction capacity to market opportunities.

在这一转化过程中，现代投资理论和信息技术是两大主要推动因素，现代投资理论不仅使风险管理的理念深入人心，还具体提供了风险度量和风险资产定价的工具，增强了市场参与者对衍生金融工具的认知能力，信息技术则为风险度量和风险资产定价所需的深度计算，以及对市场机会的迅速反应能力提供了强大的技术支持。

In this implementation, the evolutionary algorithm is hybridized with the simulated annealing algorithm and the hill climbing heuristic. The main aspects are as follows. The Metropolis criterion of the simulated annealing algorithm is introduced to select the offspring in order to make the algorithm more effective to escape the local optimum. In terms of the hill climbing heuristic, the local normal perturbing mutation operator based probability selecting is developed to enhance the local searching of the algorithm.

其主要工作是将进化算法与模拟退火算法及爬山方法相组合，引入模拟退火算法中Metropolis接受准则选择子代，提高算法跳出局部最优解的能力：借鉴爬山方法思想，构造了基于概率选择的局部正态摄动变异算子，以强化进化算法局部细搜索能力；同时进化算法以多种群方式实现，在降低计算时间的同时提高算法收敛到全局最优解的概率。

ABSTRACT The researches of this thesis are carried out around the development of high performance machine tool spindle permanent magnet synchronous motor and its drive system. Five parts are included: First of all, concerning the operating characteristics of the machine tool spindle drive system, the optimum current control strategies of spindle PMSM are determined; The design rules of spindle PMSM's key parameters are summarized, based on the study on the influences of the design parameters on the performances of the PMSM operating at different current control strategies; The practical methods to improve the flux-weakening ability of the PMSM are presented; Based on the analysis and comparison of the operating performances of PMSM with different rotor structures, a novel PMSM rotor structure, which is of excellent mechanical performance, suitable for fluxweakening operation and can improve the torque output capacity in the same time, is presented.

本文围绕高性能机床主轴永磁同步电动机及其传动系统的设计研究展开，所做工作主要包括五部分：首先，确定了主轴永磁同步电动机定子电流的最优控制策略；通过对不同控制策略下主要设计参数对主轴永磁同步电动机性能影响的计算研究，总结了参数设计规律；提出了永磁同步电动机弱磁扩速的实用措施；在分析比较不同转子磁路结构电机的性能，尤其是弱磁扩速能力的基础上，提出了一种机械性能优越，易于弱磁扩速，同时能保证电机恒转矩运行时的转矩输出能力的新型转子磁路结构。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。