查询词典 dynamic system

Objective Since the neurophysiological system is a highly nonlinear dynamic system,nonlinear dynamic information of EMG signals were extracted to describe its characteristics.

目的 由于运动神经系统本质上是一个高度非线性的动力学系统，尝试提取肌电信号的非线性动力学信息作为信号的特征。

The phase-space of a gas dynamic system can be rebuilt by using the time series measurement of gas concentration in the working environment of a mine. It is discovered from fractal analysis that the variation of a gas dynamic system in an underground mine posse...

通过分形分析发现井下瓦斯动力系统的变化具有混沌特性，从而揭示了瓦斯动力系统安全状态变化遵循某种结构化规律，理论上其状态的变化是可以被确定性预报的，从而为瓦斯爆炸灾害系统的辨识与控制提供了理论依据。

Based on rail/wheel reaction and track/bride reaction theory and systems engineering theory, new vehicle-track and vehicle-track-bridge system dynamic models are established and discussed in details, including ballast track model and ballastless track model. The characteristics of the models are:(1) vehicle-track and vehicle-track-bridge system dynamic models are coupled in vertical and lateral;(2) track vibration on bridge is taken in account, track on bridge is considered as one or two layer continuous-point supported rail model, according to actual track structure, interaction between vehicle and bridge transfer from track structure;(3) three type of ballastless track models (tieembanked, elastic-tie-block, slab track) are presented;(4) models reflect the main feature of actual vehicle, track and bridge structure, the response computation frequency of models is relatively broad, which can be applied to analyze both low frequency and high frequency vibration.

基于轮轨相互作用和线桥相互作用特点，本文从系统工程角度出发建立了车辆、有碴轨道和无碴轨道、简支箱梁桥垂向和横向耦合系统动力分析模型，该系统模型具有以下特点：（1）车线、车线桥体系均考虑为垂向、横向耦合振动系统，车线间通过轮轨接触几何关系耦合，轨道与桥梁间通过轨道与梁体间的力与位移协调条件耦合；（2）充分考虑桥上线路在车线桥系统中参振作用，根据桥上线路轨道结构特点将桥上轨道结构模型具体化，即对桥上轨道结构视为多层支承体系，车桥间的动力作用通过轨道结构来传递；（3）建立了三种形式无碴轨道动力分析模型，即长轨枕埋入式、弹性支承块式和轨道板式无碴轨道模型；（4）系统模型详细，分析频带宽，适用范围较广。

On the basis of systematic formalization description and Petri network theory and it analyzes the internal logical relation and dynamic behavior of closed yard coal wharf logistics system, also the dynamic model of this system.

基于系统的形式化描述和Petri网理论，分析了煤炭码头物流系统的内部逻辑关系和动态行为，进而建立了系统的动态模型。

Analyzing on the fault of local rubbing caused by compatible misalignment of rotors, a dynamic model for the rotor system with misalignment and rub-impact was established. Then the dynamic behaviors of this system, which varied with the values of parallel misalignment and declination, were investigated by using numerical integral method.

以水轮发电机组转子系统为研究对象，针对刚性联轴器综合不对中引起转子局部碰摩的问题，建立了机组转子不对中–碰摩耦合故障的动力学模型和微分方程，并利用数值积分方法研究该系统随不对中平行量和偏角参数变化的动力学行为。

Human body impact biomechanics parameter dynamic measurement system is used in Domestic safe dummy calibration experiment, and has succeeded in realizing the dynamic collection of the acceleration of safe dummy head, acceleration of chest, deformation amount of chest rib, wallop of knee. Results indicate the feasibility and reliability of this system.

结果表明基于混合编程思想的系统软件可方便地实现功能扩展，而且界面清晰直观，便于用户操作，有效地提高了测试系统信号分析处理的水平。

On the background of mobile computing, distributed system, agent system and ontology, the author explores the mobile computing in limited environment at three levels, i.e., mobile computing formal model, mobile ontology and application model. Some targets of the research works include the dynamic ambients calculus, robust ambients calculus and mobile ontology. Some innovative contributions of the dissertation are enumerated as: 1、Proposing a mobile computing dynamic ambients calculus.

论文研究工作基于陕西省十五科技攻关课题&移动嵌入式电子商务平台及关键技术研究&，以移动计算、分布式系统、Agent系统、本体论等相关领域技术为背景，从移动计算形式模型、移动本体论、应用模型三个层次研究了面向受限设备的移动计算技术，内容主要涉及移动计算形式模型中的动态环境演算、抗干扰鲁棒环境演算以及面向移动领域的移动本体论等，研究工作取得了如下创新性成果： 1、提出了跨平台、跨网络的动态环境演算。

In view of the system complexity, it is difficult for a number of previous methods to consider the embedded cap effects on the dynamic pile-soil interaction system. As a result, the dynamic impedance of a pile group with embedded cap was rarely reported.

由于系统的复杂性，以往桩-土动力相互作用研究的很多方法难以考虑承台的埋置作用，因此有关埋置承台群桩动力特性的研究报道很少。

In this paper the basic principle of dynamic simulation with PSS/E is presented; the effectiveness and adaptability of flexible HVDC power transmission model are analyzed, and on the basis of actual power system the quasi steady-state VSC-HVDC dynamic model VSCDCT is simulated. Simulation results show that it is available to apply PSS/E in transient stability analysis of practical large-scale AD/DC power system.

介绍了PSS/E动态仿真的基本原理；分析了柔性直流输电模型VSCDCT的有效性和适用性，并基于实际系统对准稳态直流动态模型VSCDCT进行了仿真研究，仿真结果表明 PSS/E直流模型能够满足大规模交/直流系统仿真的要求。

The static and dynamic deformation of the machine tool spindle system is the main reason which affects the machining accuracy. So the static and dynamic analysis of the spindle system structure plays an important role in the design of machine tool.

机床主轴系统的静态、动态刚度是影响机床加工精度的主要原因之一，因此机床主轴系统的静、动态性能分析在机床设计中占据重要地位。

Article 144 The Government of the Hong Kong Special Administrative Region shall maintain the policy previously practised in Hong Kong in respect of subventions for non-governmental organizations in fields such as education, medicine and health, culture, art, recreation, sports, social welfare and social

第一百四十四条香港特别行政区政府保持原在香港实行的对教育、医疗卫生、文化、艺术、康乐、体育、社会福利、社会工作等方面的民间团体机构的资助政策。原在香港各资助机构任职的人员均可根据原有制度继续受聘。

Small wonder, then, that the Chinese spend more in the shop than any other group of foreign visitors do .

这样的小惊喜，使中国顾客比任何国家的人消费得更多。