扰动

An inflation model that driven by rolling tachyon is investigated and its equation of density perturbations is derived.

我们研究了滚动快子驱动宇宙暴涨的可能性，导出了快子暴涨下的密度扰动方程。

Through field investigation on soils of different tillage ways and soils with different kinds of stubbles,the results indicated that,the effect of anthropogenic factors on wind erosion is great,and wind erosion of grasslands, soils with stubbles and ploughed farmlands was obvious different.

留茬地因为表面残茬的存在显著增加了土壤表面粗糙度，从而使得其风蚀强度较小；而秋翻地人为扰动较大，表面覆盖度较小，其风蚀强度在所研究的土壤中为最大。

Finally, the stiction phenomenon was compiled to a module by using the S-function technology in Matlab Simulink. Simulation was made under the Matlab Simulink framework and the statistical detection method under disturbance was discussed.

最后，在Matlab Simulink平台下编制了能够描述阀门静摩擦现象的S-Function模块，并进行了模拟仿真，在扰动存在的条件下讨论了统计检测方法的有效性。

In this paper, choosing submerged spheroids and Wigley hulls as computing models, the computed wave resistance and first-order wave exciting force are in good agreement with the other published results.

并将兴波阻力系数、一阶波浪扰动力的计算结果与试验结果和他人的计算结果进行了比较，吻合程度较好。

And periodic regeneration of dark solitons is not influenced by the interaction.

并且，这种再生效应对损耗和有限的扰动等不敏感。

Savannas, said Warshall, have evolved in conditions of periodic disturbance and require a natural kick every now and then.

他说，热带草原在周期扰动的情况下进化，时不时地需要自然助力。

The soil soluble salines of the flight area of Xining Caojiabao airport were studied.

通过对西宁曹家堡机场飞行区随机分区采集的土壤进行可溶性盐分测定，查明在经过严重人为扰动后飞行区土壤可溶性盐分特征。

The strength criterions established already are formulated on the basis of the properties of reconstituted or remoulded soils, which can not reflect the influence of soil structures on the properties of structured soils.

已有的强度准则是建立在重塑土或扰动土的基础上的，它们不能很好的反映结构性土的强度变化规律。

By using Matlab, the performance of rectifiers vector control strategy is researched roundly and systemically including system stable and dynamic state.

利用Matlab软件对整流器矢量控制策略的稳态、抗扰动性能，尤其在提升机负载下的性能进行全面而系统的研究。

The reactionsystem of polyesterification of DFA and EG was analyzed and simplified. Based on thehypothesis of equal and unequal activity of the end-group of monomer and polymer,the modelⅠand modelⅡfor estimating kinetic parameters were established usingimproved Genetic Algorithm, which was so improved by introducing the Elitist Model,Simulate annealing, Runge-Kutta method, proportional distribution randomizer etc.into the operators, and these models were more compatible with the estimation ofcomplex reaction kinetic model parameters.

对二聚脂肪酸与乙二醇缩聚反应体系进行了分析和简化，基于单体和聚合物端基等活性及不等活性的假设，采用已加入最优保存策略、变量数值扰动、龙格库塔积分(Runge-Kutta)算法、均匀分布的随机数发生器算子的遗传算法，建立了模型Ⅰ和模型Ⅱ，并利用C~计算机语言编程来估算动力学模型的参数。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐