查询词典 discrete continuous system

At first, this paper surveys nonlinear control and the applications of neural networks in control respectively. Then it studies definitions, mathematical descriptions and conditions of invertibility for nonlinear systems, which are used to analyze the feasibility of inverse system control method. Conclusions about the feasibility of inverse control and the realizability of αth-order inverse systems in engineering are achieved. Furthermore, this paper discusses the feasibility, structure and identification of neural network αth-order inverse system for general single-input single-output continuous or discrete nonlinear systems and various composite control methods based on the αth-order inverse. At last, as a part work of an actual project, this paper focuses on the design of neural network αth-order inverse control method for thyristor controlled series compensation in power systems and its effect in improving the stability of power systems.

本文首先分别概述非线性系统的控制与人工神经网络在控制中的应用；然后研究非线性系统各种可逆性的定义、数学描述及可逆性条件，并用于分析逆系统控制方法的可行性，得出有关逆系统控制方法可行性的结论，阐明一般情况下α阶逆系统才工程可实现；接着本文针对一般单输入单输出连续、离散非线性系统，研究神经网络α阶逆系统的可行性、结构与辨识以及基于神经网络α阶逆系统的各种复合控制方法，并给出应用例子；最后本文结合实际项目，针对采用可控串补的电力系统，设计神经网络α阶逆系统控制方法，研究其对提高电力系统稳定性的作用。

Stability can be precisely defined in terms of the impulse response of a continuous system, or Kronecker delta response of a discrete-time system, as follows

连续系统的稳定性是根据脉冲响应精确定义的；同样，离散系统根据Kronecker 响应定义如下

According to the existence results of general equilibrium problems and vector equilibrium problems have been studied more and more. Inspired and motivated by these research results, this paper is devoted to study systematically a class of equilibrium problems, which is unify and extension of a large number of known equilibrium problems and variational inequalities problems. The research is carried on from three aspects.Firstly, in finitely continuous topological spaces, we introduce four new types of the system of generalized vector quasi-equilibrium problems, and we derive some existence results of a solution for the system of generalized vector quasi-equilibrium problems via the maximal element theorems in product finitely continuous topological spaces.Secondly, in complete metric spaces, we provide the Ekeland variational principle to equilibrium problems with set-valued maps. And via the Ekeland variational principle, existence results for vector equilibrium problem with set-valued maps and the system of vector equilibrium problem with set-valued maps.

针对一般的均衡问题和向量均衡问题解的存在性，已有许多研究成果，受这些成果的启发，本文主要从理论上较为系统地研究了一类均衡问题，它统一和推广了许多已有的均衡问题和变分不等式问题，研究分有三个方面；首先，在有限连续拓扑空间中，我们提出了四类广义向量拟均衡系，并借助于有限连续拓扑空间中的极大元定理讨论了这四类均衡系问题的解的存在性问题，然后，在完备度量空间中，我们给出了关于集值均衡问题的Ekeland变分原理，并利用Ekeland变分原理分别讨论了集值向量均衡问题和集值向量均衡系问题的解的存在性。

This paper analyzed the effect of continuous vaccination control and pulsive vaccination control of this system, and gave the reproductive number of the system with continuous vaccination as well as the system of pulsive vaccination.

另外，本章在理论分析较为困难的前提下利用数值模拟的手段发现脉冲使原无受迫系统的周期解变得

Secondly, in the dissertation, the theories and methods of calculation on bridge deck system were discussed, and bridge deck system simplified as a beam was analyzed with the theory of elastically supported continuous beam and the method of deformation compatibility; through the theory of orthotropic plate being applied to analyzing the bridge deck system which was assumed an elastically supported continuous plate, certain theoretical derivations were made and some calculation formulas were given.

其次，本文研究论述了桥道系的计算理论和方法，将桥道系简化为梁，利用弹性支承连续梁理论和变形协调法进行分析；把桥道系视为弹性支承连续板，利用正交异性板理论进行分析，作了一定的理论推导，并给出了相关计算公式。

The system is mainly used for 140 horizontal continuous casting machine power plant, control of the working point tank movements, As the system configuration on a level of temperature, pressure relay (HED10A20), the solenoid valve, valve, safety valve, and so can the system oil temperature, pressure and other remote control and compact design of the structure, convenient operation and reliable performance, energy conservation is SLD-140 horizontal continuous casting machine hydraulic devices supporting the ideals of hydraulic equipment.

该系统主要用于140水平连铸机的动力装置，控制各工作点油缸动作，由于该系统配置有液位液温器、压力继电器（HED10A20）、电磁阀、溢流阀、安全阀等，因此可对系统的油液温度、系统压力等实现远程监控，其结构设计紧凑、操作方便、性能可靠、节约能源是SLD-140水平连铸机液力装置的理想配套液压设备。

According to structural characteristics of floating slab tracks, a track segment element was taken between two adjacent fasteners. For each element, rails were regarded as Euler beams supported by discrete viscoelastic supports. The fasteners and rubber supports were replaced by a linear spring and damp. So the vibration model of the floating slab track was established. In constructing vibration model of a metro train, each car of the metro train with two suspensions was modeled as a multi-rigid body system, in which rigid bodies were connected with each other by a linear spring and damp. Combining the potential energy of vertical vibration of the track with that of the metro train, the total potential energy of vertical vibration of the train and track was obtained. And then, the matrix equation of vertical vibration of the system was established using the principle of total potential energy with stationary value in elastic system dynamics and the "set-in-right-position" rule for formulating system matrices. The vibration responses of the system can be obtained by solving the matrix equation with the direct time integration such as Wilson-θ method.

摘 要：针对浮置板式轨道结构特点，取相邻2个扣件之间的轨道为1个轨段单元，钢轨视为连续弹性点支承Euler梁，浮置板视为弹性薄板，扣件系统及橡胶支座均模拟为线性弹簧及粘滞阻尼器，建立浮置板式轨道振动模型；将城轨列车中的车辆均离散为多刚体系统，各刚体之间通过线性弹簧及粘滞阻尼器相连，建立列车振动模型；将浮置板式轨道及列车振动势能叠加，得到系统竖向振动总势能；基于弹性系统动力学总势能不变值原理及形成系统矩阵的"对号入座"法则，建立此系统竖向振动矩阵方程；采用Wilson-θ逐步积分法求解此矩阵方程，得出此系统竖向振动响应。

The construction of internal risk management system with the core of customer management system is the most innovative ideas the paper brings. For example, it presents pyramidal customer theory dividing customers into target customer, company customer, intent customer, trade customer and partner customer; in concrete risk management, it presents implementing diversity management according to customers' different level, different traits and different influential abilities with the aim to extend management scope to target customer onwards and transfer from trade customer to partner customer rearwards. This system is established in reducing and eliminating risk through diversity management towards customers. As corresponding measure going with this system construction, it presents new ideas of standardizing risk management flow and internal control process with ISO9000 system and implementing continuous improvement of risk management system through "6SIGMA" method.

以客户管理体系为核心的内部风险管理机制的建设，是本论文有创新点之处：金字塔型客户理论的提出，将客户分成目标客户、交往客户、意向客户、交易客户、伙伴客户；在具体的风险管理上，提出应根据客户的不同层次、特性和影响度实施差异化管理，将管理范围向前延伸到目标客户，向后扩展到交易客户向伙伴客户的培养转化；该机制立足于通过对客户的差异化管理来降低、化解风险，作为该机制建设的配套措施，提出通过ISO9000体系规范风险管理流程和内部控制程序，以及通过"6SIGMA"体系进行风险管理机制的持续完善的新见解。

The subject of the full text builds up and divides six major chapters together: Chapter 1 is the foreword, and has studied the current situation and refined and summarized to value and meaning of the selected title background of the thesis, selected title abroad synthetically; Chapter 2, have carried on science to define to the intension of responsibility and governments relevant concepts of responsibility, have explained that constructs the necessity of the responsibility government and realistic meaning; Chapter 3, ility the intension made of the responsibility has been carried on science solves and constructs, summarize the political function and basic principle of administration asking responsibility system, and the logic relation between administration asking and the responsibility government of the responsibility has been analysed scientifically; Chapter 4, has used the administrations of western countries for reference and administration asking responsibility system and high-ranking official asking system of Hong Kong area of our country and the successful experience, expect to the institutional improvement of the administration asking responsibility system of our country can be beneficial; The whole chapter 5, the current administration asking system of our country that has implemented the state and carried on objective analysis in responsibility system, have pointed out a series of questions and not complete places exposed in institutional improvement, and has carried on network analysis from two visual angles of the traditional political culture ecology and system factor aspect to the reason why the question emerges; Chapter 6, the responsibility system has carried on tentative countermeasure analysis and discussion in perfecting the administration of our country, separately from improving the environment of administration asking responsibility and reinventing the culture of administration asking responsibility, devoting more efforts to asking the responsibility in allosome, strengthen the related institutional improvement of administration asking responsibility system, etc.

全文主体架构共分6大章节：第1章为引言，对论文选题背景、选题价值与意义及国外内研究现状进行了综合提炼与概括；第2章，对责任和责任政府相关概念的内涵进行了科学界定，并阐述了构建责任政府的必要性和现实意义：第3章，对行政问责制的内涵进行了科学解构，概括了行政问责制的政治功能及其基本原则，并对行政问责制与建立责任政府的逻辑关系进行了科学分析；第4章，借鉴了西方国家行政问责制度及我国香港地区高官问责制的成功经验，以期对我国行政问责制度建设能有所裨益；第5章，对我国现行行政问责制度实施状况进行了客观分析，指出了在制度建设过程中暴露出来的一系列问题和不完善之处，并对产生这些问题的原因从传统政治文化生态及制度因素层面两个视角进行了系统分析；第6章，对健全和完善我国行政问责制度进行了尝试性的对策分析与探讨，分别从完善行政问责环境、重塑行政问责文化，加大异体问责的力度，加强行政问责制配套制度建设及行政问责制立法等角度提出了完善的措施和途径。

The AVN2440DS shield machine consists of cutterhead driving system, thrust system, guidance system, segment erection system, grease injection system, main bearing lubrication system, slurry feed and return system, simultaneous grouting system, segment delivery and hoisting system and backup gantries.

AVN2440DS泥水平衡盾构机主要由刀盘驱动、推进、导向、管片拼装、盾尾注脂、主轴承油脂润滑、进排浆系统、同步注浆以及附加接管器、管片吊运、后配套拖车等系统组成。

But GST= 0.156, Nm=1. 588. As a result, the foundation of Youyongchi Avicennia marina population was the result of the migration of hypocotyles and human factors.

这项工作可以为海岸防护林中新引进种类的判定以及为研究种群建立者效应方法的确定提供科学依据。

The two-dimensional CDRC-ADI-FDTD update equations for collision unmagnetized plasma are induced. The unconditional stability of the CDRC-ADI-FDTD formulation for collision unmagnetized plasma is obtained by the examples.

推导了碰撞非磁化等离子体中的二维CDRC-ADI-FDTD迭代公式，并用算例验证了碰撞非磁化等离子体CDRC-ADI-FDTD算法也是无条件稳定的。