查询词典 logistic system

Based on the research results of Chaos theory, in this dissertation, it has made detailed analysis of the chaotic signal generator. Firstly, the characteristic and various detection methods of chaotic signal are recommended. Secondly, with the aid of software, such as MATLAB, PSPICE, EWB, etc, discussion of the process of generating chaotic signal proceeds. Through simulation, the output result of several kinds of chaotic circuit are analyzed and compared. Thirdly, aiming at Chuas chaotic circuit, through debugging, the impacts by components and parts in the circuit, such as operation amplifier, capacity, inductor, etc, has been further investigated. And then provides a new scheme to implement Lorenz chaotic system, the circuit design and analysis are presented in detail and it can be realized by the hardware of programmable arrays FPGA, the experimental results indicate that this scheme has the advantages of easy operation, flexible design and high efficiency. An application example in secure communications is also provided. Finally, through picking up the characteristic parameter-Lyapunov exponent of the Chaos we can analyze the performance of different chaotic signal generators.

本文在混沌理论研究成果的基础上，对混沌信号的产生做了详细的分析，涵盖以下内容：首先介绍了混沌的定义，混沌信号的基本特性和各种判别方法，特别是对简单的一维Logistic映射的硬件实现问题做了初步探索；其次对混沌信号的产生方法进行讨论，借助于MATLAB、PSPICE、EWB等仿真软件，对几种混沌电路输出的混沌信号进行了分析比较，并在此基础上针对典型三阶连续自治系统Chua's电路作进一步实验研究，通过混沌电路调试，深入研究电路中各元器件，特别是运算放大器、电容、电感等对混沌信号时域以及频谱的影响；再次研究连续混沌系统的数字化硬件产生，设计了Lorenz混沌电路在现场可编程门阵列FPGA上实现的新方案，在保密通信中的应用实验结果表明该方案具有操作简单、设计灵活、效率高等优点；最后针对不同混沌系统，采取不同算法，提取混沌特性参数Lyapunov指数，进而对不同的混沌信号发生器的性能进行了分析。

In recent years,Beijing Post Company did a useful attempt on this,which exposed the shortcomings of hardware facilities and management,especially the inconsistent situation between the upstream corporations and the downstream corporations of supply chain due to the distempered ness of related E-Commerce logistic system.

近年，北京邮政在这方面做出了有益的尝试，也暴露出硬件条件和管理水平上的欠缺，特别是由于电子商务的配套物流系统不健全，造成供应链上下游企业间关系处于不协调的状态。

The principle to set up the enterprise logistic system is discussed in the first part of this chapter.

第一节介绍了构建生产企业物流绩效评价体系应遵循的原则。

Under this section, how to diagnose the enterprise logistic system become more and more important.

因此，对企业物流诊断工作显得越发重要。

This paper describes the history and basic functions of modern logistics as well as the composition of manufacturing enterprise logistic system.

简述了现代物流发展历史及基本作用，论述了制造企业物流系统的基本构成。

To distribution center, vehicle routing problem is a pivotal problem to logistic system optimization.

对配送中心来说，物流配送车辆的路径优化是物流系统优化的一个关键环节。

Hence, the choice of commodity and the construction of modernized logistic system are indispensable to develop BtoC business.

发展 BtoC 业务，商品的选择和现代化的物流配送体系的建设，二者缺一不可。

This paper is written based on deep investigation into the logistic system of BeijingDaRuiXing Metal Products Co.

本报告是在对北京达瑞兴钉业有限公司物流系统进行深入调研的基础上撰写而成的。

Location of distribution center in logistic system involves many factors,some of which are quantitative,and others are qualitative.

论述了物流系统配送中心选址所涉及的众多影响因素，这些因素中既有定性因素，又有定量因素。

A communication mechanism between agents in a logistic system is designed.

设计了一种物流调度系统中多Agent间通信机制。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。