查询词典 variation of parameters

The transient design problems of high-frequency transformer and its buffer circuit of main circuit are discussed in detail and the influence of variation of the elements parameters on the main circuit transient behavior is explored qualitatively and quantitatively.

围绕逆变电源主电路动态过程的设计问题，重点讨论了功率脉冲变压器及其缓冲电路的设计要点，定性和定量地探讨了器件参数变化对主电路动态过程的影响，在仿真的基础上，实现计算机辅助优化设计。

In the proposed method the data from state estimation or power flows during larger time interval is used to calculate nodal voltages and the initial value of current transitive-relationship matrix; the variation of diagonal elements of this matrix reflects the variations of the detailed models of system components, network topology and parameters after the perturbation, then by use of the PMU measured data in millisecond level the primary diagonal element can be modified.

该方法采用时间间隔较大的状态估计或潮流数据计算节点电压和电流传递关系矩阵的初值，并利用该矩阵主对角元的变化反映受扰后系统各元件的详细模型、网络拓扑和参数的改变，然后使用相量测量单元毫秒级的量测数据对其进行修正，从而为在实际应用中将相量测量单元与SCADA系统相结合做出了有益探索。

The main contents of this dissertation are as follows:(1) According to involved theories of ferromagnetics, the microscopic mechanism of domain structure is analyzed systematically; through the movement variation of domain structure, that is the movement of domain wall and rotation of magnetic moment, the magnetization process is illustrated in an applied magnetic field. Meanwhile, by the use of energy methods, a study is performed on influencing factors of domain movement including stress, dope, scattering field, etc. The influence of various energies is dealt with on the magnetic behavior and parameters of ferromagnetic material; the corresponding theories of the spontaneous magnetization and technical magnetization are also discussed.

本文以此为研究背景，通过理论分析和模型试验，系统地研究了钢结构全磁通应力无损检测技术的基本理论和应用方法，主要研究工作如下：(1)根据铁磁学的相关理论，分析了铁磁材料磁畴结构产生的微观机理，并通过对磁畴结构运动变化规律，即磁畴壁移动和磁矩转动规律的研究，分析了外磁场作用下铁磁材料的磁化过程与一般规律，同时采用能量分析方法，研究了影响铁磁材料磁畴运动的主要因素，包括应力、掺杂和弥散磁场等，探讨了各种能量对铁磁材料磁行为和磁参量的影响，研究了相应的自发磁化理论和技术磁化理论等。

A discrete Logistic model was applied to icefish populations analyzing and simulating the variation of the annual catchment production of icefish populations for four typical lakes/reservoirs such as Dianchi lake in China, it was found as evidence of chaos in a natural eco-system that the parameters of icefish populations for four lakes/reservoirs fall into chaotic region under normal circumstance.

将离散Logistic模型应用于银鱼种群数量变动研究，通过对滇池等4个典型湖泊或水库的银鱼年产量变动的初步分析和模拟，发现所有的湖泊或水库银鱼产量的参数值都落入了混沌区间，在自然生态系统中找到了混沌行为的证据。

Through a series of studies, the knowledge on key parameters such as distribution, magnitude and temporal variation of negative friction of structural pile foundation, and the location of neutral point is acquired, which is valuable and contributes largely to the subsequent construction of the Yangshan project.

通过一系列的研究，取得了对该结构桩基负摩擦力分布、数值大小、随时间变化的规律、中性点位置等关键参数的认识，对指导洋山后续工程的建设起到的很有价值的成果。

Finally, applying the current basis function of three-term sinusoidal expansion, the radiation characteristic and input impedance of the vertical and horizontal antennas above lossy ground are analyzed by the method of moments with the variation of frequency, height from the ground and ground parameters.

最后，用矩量法，采用正弦插值基函数，研究地面上方垂直、水平线天线的辐射特性和输入阻抗随着频率、离地高度、地面参数等变化的情况。

Dealing with the high sweepback flying wing, the classical layout of the control surfaces is given, after the CFD computes, the dynamic characteristics of the control surfaces are analyzed, the variation of the dynamic parameters caused by the deflection of the elevator, aileron and the split-drag-rudder are studied to provide a reference to design the control system.

针对所建立的大后掠飞翼模型，给出了一套典型的操纵面布置方案，通过CFD计算后，对各舵面气动特性进行了分析，在升降舵、副翼和阻力方向舵偏转过程中对各气动参数的影响进行了研究，给控制系统的设计提供了依据。

Hence, a self-balancing controller is implemented by considering the motion as well as configuration variation of the upper body (the 9-DOF mechanism). The control law utilizes the principle of computed torque method with online identification of related parameters using various sensors including an accelerometer. The incline angle is obtained by fusing a gyroscope and a tilt sensor. Under the balancing control, the forward motion of the robot is achieved by giving a desired tilt angle profile.

除此之外，本作品将此机器人装置在一具二轮式自动平衡移动平台之上，它提供了机器人灵活移动和转身的能力，但碍於此一平台本身为不稳定系统，所以必须实现一自动平衡演算法去计算底座以及上半身机器人动作行为的转动力矩，利用计算转矩法以及陀螺仪、倾斜仪和加速规去即时更新系统参数，让整个系统可以即时地保持平衡，并且利用设计角度值的概念让整个系统移动。

First, the Lyapunov functional and variation of constants method are adopted to study the effect that Sigmoid function and the relation of resistance, capacitance and current in Hopfield neural networks have on the stability of networks. The stability criterion constructed by physics parameters is obtained. Thus how the constrained relation of physics parameters affects the stability of Hopfielf neural networks is clear. Based on the study above, the perturbation model of recurrent neural networks is constructed. And the theorems of the existence of solution of perturbation model are presented.

首先，采用Lyapunov泛函法和常数变易法研究Hopfield神经网络中给出的电阻、电容、电流之间的关系以及Sigmoid函数对网络稳定性的影响规律，得出仅由物理模型参数构成的稳定性判据，从而弄清物理模型参数约束关系对Hopfield神经网络稳定性所起的作用，在此基础上，构建了递归神经网络的扰动模型，并通过讨论扰动模型解的存在性问题，给出递归神经网络扰动模型解的存在性定理。

The variation of gas parameters in the real compression process of the compressor is worked out in the computer simulation, and effects of some parameters on the performance of the system are studied.

本文建立了这种压缩机的热力模型、泄漏模型、传热模型、和吸气加热损失模型等构成的综合数学模型，进行了计算机仿真研究，给出实际工作过程中气体参数的变化规律和对性能的影响。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。