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Basic function of the liquid surface evolving analysis software: Surface Evolver is introduced, and its basic modeling way of 3-D surface demonstrated.

第三章以无引脚SMC焊点形态为例,对SMT焊点形态数学模型建模和成形预测方法问题展开了分析比较研究。

The quantitative modeling of root water exaction is difficult in research on soil-root hydraulic dynamics.

根系吸水的定量模拟是土-根系统水分动力学研究的难点之一。

modeling ; particle swarm optimization algorithm ; proton exchange membrane fuel cellPEMFC

PSO算法是J.Kennedy等[4]提出的一种生物进化算法。它采用速度-位置搜索模型,每个

In order to improve the reliability of the nuclear Generating Sets and the stabilization of the power system, prevent the long time low frequency oscillation caused by the disturbed of the outside electrical net, assured improving the stabilization margin of the nuclear generating sets in the precondition of enough transient stability, validate the sensitivity of the parameter to the damping of Generating Sets of the MEC5220 digital excitation adjustor produce in Japan that used in the Second Project of Qinshan Nuclear Power Plant, confirm the parameter rationality of the digital excitation adjustor, optimize the parameter of PSS, in this paper, we put up a in-depth study to the principle of MEC5220 digital adjustor produce in Japan by the PSS/E software that develop by the PTI Company in the USA, completed the modeling of the excitation adjustor, PSS, generator, excitor, described the performance of this excitation adjustor, analyzed the essential reason that caused the low frequency oscillation, illuminated the factor that influence the damping characteristic of the MEC5220 digital excitation adjustor. Based on model and emulate, this paper optimized the primary parameter of the excitation adjustor, make a reasonable regulation to the PSS parameter.

为提高核电机组的运行可靠性和接入系统的安全稳定性,防止在外电网的干扰下核电机组发生长时间的低频振荡,保证机组在暂态稳定的前提下提高其稳定裕度,验证秦山核电二期核电机组所配日产MEC5220型数字式励磁调节器参数对机组阻尼的灵敏性,确定数字式励磁调节器的参数的合理性,优化PSS整定参数,本文利用美国PTI公司研发的PSS/E软件对日产MEC5220型数字调节器的原理进行进行了深入细化的研究,完成了励磁调节器、PSS、发电机、励磁机的建模,描述了该型励磁调节器的性能,分析了产生低频振荡的根本原因,阐明了影响阻尼特性的因素。

The paper reviews home and overseas research works on exhumation and use of nitrogen-fixing resource, genetics engineering of nitrogen fixation, and biochemistry of nitrogenase and chemical modeling of biological nitrogen fixation, and describe the prospect of biological nitrog...

本文从固氮资源的发掘和利用、固氮的遗传工程以及固氮酶生物化学和化学模拟生物固氮三方面对国内外的研究进展进行了全面的阐述,并对生物固氮研究的前景进行了展望。

The paper reviews home and overseas research works on exhumation and use of nitrogen-fixing resource, genetics engineering of nitrogen fixation, and biochemistry of nitrogenase and chemical modeling of biological nitrogen fixation, and describe the prospect of biological nitrogen-fixing research.

本文从固氮资源的发掘和利用、固氮的遗传工程以及固氮酶生物化学和化学模拟生物固氮三方面对国内外的研究进展进行了全面的阐述,并对生物固氮研究的前景进行了展望。

The maximum entropy approach is proved to be expressive and effective for the statistics language modeling , but it suffers from the computational expensiveness of the model building .

但是,在用现有的最大熵方法建立统计模型时存在计算量过大的问题〔2〕。

The maximum entropy approach is proved to be expressive and effective for the statistics language modeling, but it suffers from the computational expensiveness of the model building.

近几年在自然语言处理的研究过程中发现,最大熵方法是一种建立统计语言模型的有效方法,具有较强的知识表达能力。

The experientialism began its renaissance in the 1980's and made considerable progress in the statistical language modeling research.

这种基于符号模型的研究方法具有语言学解释上的直观性,然而一直无法摆脱知识瓶颈问题的困扰。

From 1999 to 2000, we had made modeling experiments for a year to Xianghuaqiao runoff experiment station.

从1999到2000年,我们在香花桥径流试验站进行了一年多的模拟试验。

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推荐网络例句

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了,但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场,你等着挨绳子吧!

Several theories about reigniting and extinguishing of the arc have been refered.

本文综合考虑了几种电弧重燃和熄灭理论。