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In view of the complexity of the measure system to calculate, analyze and evaluate internet economics, this paper explores the meta- synthesis, an effective model building method.

本文从网络经济系统属于复杂系统的角度出发,从定性到定量的综合集成分析就是测度网络经济系统的有效的系统建模方法。

The matching law of CVT and the engine is discussed in the condition of achieving minimum fuel consumption at all times.

文中首次建立了包括CVT液压控制系统的装有CVT的动力传动系统模型,说明装有CVT的动力传动系统是复杂的多输入、非线性系统。

In addition, the time and space performance, the application of system and the modularization designs of radar GIS are presented.

最后介绍了雷达地理信息系统的时间空间性能、系统应用以及系统的模块化设计思路。

For the convenience of test and maintainability,a test technique for multiprocessing systems,which is based on TDM bus is addressed.

必须提高系统设计的标准化、通用化、模块化程度,提高系统的检测能力和系统软件在线可修

The joint effect of active and reactive power on the voltage stability of a typical power system was considered by analysing the two parameter bifurcation problem related to nonlinear oscillation phenomena. Numerically, as the active power P1 increases, the Hopf points get closer and eventually coincide at P1=1.455 43 the cyclic fold curve gets closer and closer to the Hopf curve and finally intersects the Hopf curve at a singular point the period-doubling points also get closer and finally coincide at P1≈0.65. The stability behaviour is pre-determined using the normal form approach near the limit point of the Hopf curve. Hence, in the power system attention should be paid to both the consumption of active power and the decrease in the reactive power to prevent nonlinear oscillations. A controller can be designed to absorb some active power and to avoid the nonlinear oscillations that damage the system components.

针对一个典型的单机无穷大电力系统,通过分析系统的双参数分岔的非线性振荡现象,综合考虑有功和无功功率对电压稳定性的影响数值分析表明,随着有功功率的增加,电力系统的Hopf点越来越靠近,最终合为一点在P1=1.455 43处同时圈折cyclic fold 曲线也越来越靠近Hopf曲线,并在Hopf曲线的稳定与不稳定临界点处与Hopf曲线相交倍周期分岔点也随着越来越靠近,最终在P1≈0.65 合为一点应用正规形理论方法,初步确定了Hopf曲线极限点附近的稳定性态因而,电力系统应注意让负荷利用有功功率,减少无功功率的产生以防止非线性振荡另外,可以设计一个稍微吸收网络的有功功率的控制器,以避免因周期振荡而造成电力系统仪器的损坏或电压崩溃

It could display only when exposed to disturbance which causes the degradation of ecosystem however it is impacted by natural or nonnatural factors. The concepts of fragility and stability, the fragility in relation to species invasion and extriction, to diversity and stability of ecosystem, to primary productivity, to niche differentiation as well as to microclimatic change of ecosystem are discussed....

而干扰(包括自然干扰和人为干扰)又是引起退化生态系统的原因,种类的入侵和消亡、种类组成的变化、生态系统的多样性和稳定性、生产力、生态位的分化及生态系统小环境变化则是研究退化生态系统形成和恢复的重要内容,本文探讨脆弱性与退化生态系统诸方面的关系以及在植被恢复上的应用。

Theoretic models and methods using nonnumeric parallel optimization algorithm, genetic algorithm and simulated annealing algorithm, to adjust and control the production-injection system were made with taking the net present value as the objective function and coupling economic model, reservoir model, wellbore model including producer and injector, and choke model.

以净现值为系统目标,耦合经济模型、油藏模型、注采井筒模型和油嘴模型,首次建立利用非数值并行算法——遗传算法与模拟退火算法调控注采系统的理论模型与方法,对不同开发阶段与不同约束条件下的注采系统进行最佳调控,使之保持最优生产状态。

Based on chapter two, In chapter three, the method of multiple scales is introduced to the study of the multiple-dimensional nonlinear stochastic systems under random external excitation. Using method of multiple scales, we strictly deduce the equation of modulation of amplitude and phase. The effects of random excitations are analyzed; numerical simulations verify the results. Theoretical and numerical simulations show that when the intensity of the random excitation increases, the nontrivial steady state solution may be changed from a limit cycle to a diffused limit cycle.

在第二章基础上,第三章将多尺度法引入到相应的随机系统的研究中;严格推导了系统的约简方程,用矩方法求出稳态解应满足的方程,获得一些结果;并且数值模拟结果与理论推导的结果是一致的;并注意到,与其对应的确定性系统相比较,系统响应从周期解变为近似周期解,系统的相轨线从极限环变为扩大的近似极限环;随着激励带宽的增大,此扩大的近似极限环的宽度将增大。

The paper establishes the standard fuzzy systems with partition of normal quadratic polynomial membership functions and normal trigonometric membership functions. The comparison problems of fuzzy system with normal triangle membership functions and the two fuzzy systems are put forward.

摘要在标准模糊系统的基础上建立了正规二次多项式和正规三角函数为基函数的两类新模糊系统,进而提出了以正规三角形函数为基函数的标准模糊系统与所提出模糊系统的比较问题。

This paper gives an in-depth research of communication library systems for numberical computing from application program interfaces, collective communications, and testing.

本文从通信库系统的应用程序界面,集体通信,和通信库系统测试等几方面对面向数值并行计算的通信库系统进行了深入探讨。

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推荐网络例句

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务,乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐,因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。

Closes the eye, the deep breathing, all no longer are the dreams as if......

关闭眼睛,深呼吸,一切不再是梦想,犹如。。。。。。