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慢动态
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  slow dynamics
     Influence of Slow Dynamics on Mid-long Term Instability Mechanisms of Power Systems
     慢动态对电力系统中长期失稳机理的影响
短句来源
     Using singular perturbation model,by the example of a simple power system losing stability in big disturbance, this paper analyses the mid-long term instability mechanisms affected by slow dynamics.
     采用奇异摄动模型,通过一个简单电力系统在大干扰下发生中长期失稳的实例,分析了慢动态对系统中长期失稳的影响。
短句来源
     In terms of the aircraft characteristics, the aircraft dynamics are divided into fast dynamics of angle speeds and slow dynamics of roll angle, angle of attack and sideslip angle.
     根据飞机的动态特性,将飞机动态分为角速度快速动态与滚转角、迎角与侧滑角表示的慢动态
     The systematical reduction method is introduced to obtain reduced model of power system, and the simplified power system model obtained by neglecting fast dynamics and fixing slow dynamics corresponds to traditional power system model reserving structure, which is of sharp significance to the understanding of system destabilization mechanism.
     利用系统化的降阶方法,对电力系统模型进行降阶,并通过忽略快动态和固定慢动态,得出一个简化的、符合传统电力系统储备结构的电力系统模型,这对理解系统失稳机制具有重要意义。
短句来源
     The angle speeds are used to control the slow dynamics and the obtained angle speeds are supposed to be the desired commands of the fast dynamics simultaneously.
     以角速度作为慢动态的控制输入,控制慢动态,得到的控制量作为快动态的期望指令。
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  “慢动态”译为未确定词的双语例句
     Simulate the quick dynamic and slow dynamic.
     用快动态和慢动态模型对电力系统自组织临界进行了模拟。
短句来源
     The experimental results indicate that there exists viscoelastic ef- fect on the phase separation evolution. The double phase separation was observed in the blend with lower content of PES (13.2 wt% and 15.9 wt%) cured at 120 and 140 ℃. However, this phenomenon did not occur when the higher PES content blend (18.5 wt%) was cured at the same temperatures.
     实验结果表明在该体系的相分离的演化过程中存在着明显的慢动态相的粘弹性效应,同时对于PES含量较低的体系(PES-13.2wt%和15.9wt%),在120和140℃固化时均观察到二次相分离现象,而PES含量较高的体系(PES-18.5wt%),在同样温度下固化时仅观察到一次相分离过程.
短句来源
     The TRLS results display clearly that the phase separation take place according tospinodal decomposition mechanism and the evolution of scattering vector qmcorresponding to epoxy droplets follows Maxwell-type relaxation-3- 复旦大学 高分子科学系英文摘要 博士学位论文equation qm(t) = q0 + A0 exp(?t /τ) . The temperature-dependent relaxation time τwas thus obtained.
     光散射结果发现,随着固化反应的的进行,PEI 改性环氧体系发生SPINODAL 相 分 离 qm 指 数 减 小 可 以 由 MAXWELL 粘 弹 性 方 程qm(t) = q0 + A0 exp(?t /τ)描述,从而得到各体系不同温度下的对应于快动态相从慢动态富集相扩散的松弛时间τ 。
短句来源
     A set of measuring system controlled by a computer,which is able to measuredielectric hysteresis loops and electrical field induced strains of ferroelectric materials under highelectrical field and ultra-low frequency simultaneously,has been set up. The measuring. temPerature range is between- 50℃ and 120℃,and frequency is between static state and 10Hz.
     本文论述了为测量电诱应变材料的强电场特性而建立的电诱应变与电滞回线微机控制同步超低频测量系统,该系统的测量温度范围为-50℃~120℃,可以同步测量从静态到慢动态(10HZ)之间不同频率下的铁电、电诱应变特性;
短句来源
     It is shown that the dynamical adjustment of OLTC can lead to long term voltage instability after a small disturbance when the system lacks reactive power and both dynamic and static parts of load model are considered.
     表明在考虑了动静态负荷的情况下 ,当系统无功功率不足且系统扰动较小时 ,确实存在由于OLTC的连续调节而引起的慢动态电压失稳 .
短句来源
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  相似匹配句对
     DynamicState
     动态
短句来源
     Trends
     动态:
短句来源
     FDI of Slow-Grown Faults of Dynamic Systems
     动态系统变型故障的检测与隔离
短句来源
     Go Slow
    
短句来源
     A Relative Study on Skeletal Muscle Sustained Active Delay Stretch Contract
     骨骼肌持续动态张力收缩的相关研究
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  slow dynamics
Special attention is given to the dissipative manifestations of the presence of cracks and to the effects of the symmetrically time-reversible slow dynamics observed for acoustically activated cracks.
      
Orbital approach to studying the slow dynamics of stellar systems
      
The slow dynamics of arms in the ranges of times t=0.01-20 ns, momentum transfers q=0.2-0.6 nm-1, and temperatures T=20-60°C does not obey the simple models of Rouse and Zimm.
      
The model of N-axis flexible joint manipulators is derived and reformulated in the form of singular perturbation theory and an integral manifold is used to separate fast dynamics from slow dynamics.
      
In the vicinity of the critical point the behaviour of the system is described by the slow dynamics of two complex order parameters.
      
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An improved neuron control algorithm is presented,in which the proportional coeffi-cient of neuron(K)is chosen according to error feedback by the expert control idea,Nonlin-ear transformation is used to strengthen the neuron control sensitivity to small deviation. The learning rate,dynamic response as well as the anti-disturbance ability have all beengreatly improved;The new algorithm has strong robustness and the performance is found tobe better than that of the classical PID method.Based on the simulations...

An improved neuron control algorithm is presented,in which the proportional coeffi-cient of neuron(K)is chosen according to error feedback by the expert control idea,Nonlin-ear transformation is used to strengthen the neuron control sensitivity to small deviation. The learning rate,dynamic response as well as the anti-disturbance ability have all beengreatly improved;The new algorithm has strong robustness and the performance is found tobe better than that of the classical PID method.Based on the simulations carried out on typi-cal 2 nd order plus pure lag object,the effectiveness and feasibility of the algorithm are veri-fied.

提出了一种改进的神经元控制算法,此算法采用专家控制与神经元控制相结合的方法,有效地解决了神经元网络控制时学习速度较慢、动态响应过程长、克服扰动不力等问题,具有较强的鲁棒性。控制性能优于经典PID方法。典型工业过程对象的仿真表明了本算法的可行性和有效性。

A set of measuring system controlled by a computer,which is able to measuredielectric hysteresis loops and electrical field induced strains of ferroelectric materials under highelectrical field and ultra-low frequency simultaneously,has been set up. The measuring. temPerature range is between- 50℃ and 120℃,and frequency is between static state and 10Hz.Instead of method by using artificial compensating R-C circuits, a new kind of softwaremethod for correcting hysteresis loop has been proposed. The experimental...

A set of measuring system controlled by a computer,which is able to measuredielectric hysteresis loops and electrical field induced strains of ferroelectric materials under highelectrical field and ultra-low frequency simultaneously,has been set up. The measuring. temPerature range is between- 50℃ and 120℃,and frequency is between static state and 10Hz.Instead of method by using artificial compensating R-C circuits, a new kind of softwaremethod for correcting hysteresis loop has been proposed. The experimental results are in goodagreement with thd standard values and data measured by compensating circuit methed respectively. Finally least squares simulating methed has been used for dividing piezoelectric effectpart from electrostrictive effect part in high electric field.

本文论述了为测量电诱应变材料的强电场特性而建立的电诱应变与电滞回线微机控制同步超低频测量系统,该系统的测量温度范围为-50℃~120℃,可以同步测量从静态到慢动态(10HZ)之间不同频率下的铁电、电诱应变特性;提出了一种软件修正电滞回线的方法,通过对替代物(阻容元件)的测量以及诸钛酸铅铜材料的对比实验,表明该修正方法可以得到满意的结果;采用最小二乘拟合的方法,对铁电材料强场下电诱应变的压电分量和电致伸缩分量进行了分离。

This paper presents a kind of adaptive neural network(NN) control method based on genetic algorithms(GA). In order to overcome the defects such as slow convergent speed and unsatisfied dynamic character when backpropagation(BP) is used to train the NN control system, the method using a modified GA to train parameters of NN is proposed to improve the performance of the control system. Simulation shows that the controller has fine accuracy, robustness and dynamic character when it is used to control nonlinear,...

This paper presents a kind of adaptive neural network(NN) control method based on genetic algorithms(GA). In order to overcome the defects such as slow convergent speed and unsatisfied dynamic character when backpropagation(BP) is used to train the NN control system, the method using a modified GA to train parameters of NN is proposed to improve the performance of the control system. Simulation shows that the controller has fine accuracy, robustness and dynamic character when it is used to control nonlinear, time variable and time delayed systems.

提出了一种基于遗传算法的神经网络自适应控制方法.该方法是针对BP算法训练神经网络控制系统时收敛速度慢、动态特性不够理想等不足,用改进的遗传算法来优化神经网络辨识器与控制器的参数,以提高控制系统的性能.仿真实验表明该控制器对于非线性、时变、滞后等对象都具有很好的控制精度、鲁棒性和动态特性

 
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