查询词典 system analysis

Main points of the thesis are as follows:(1) The main function models and information relations between these models in the CAPP system in the integrated CAD/CAM project are explained, a new process plan design method is mentioned based on analyses of process plan design. This method is based on the process plan prototype, and develops the prototype little by little until the perfect process plan is completed, the prospect of this method is discussed;(2) The feature abstracting rules and methods are studied, a feature coding system is developed based on GT, all the defined feature models are described by the mathematical methods;(3) The integrated method of CAD/CAPP based on features is mentioned, this method defines a feature exchanging model, and develops an interface software to exchange design data into technology data base, this technology data base includes the design and technology information of the parts;(4) The process plan reasoning method based on features is created, this method uses Mycin algorithm to solve the reasoning of the feature process plan. A process plan making system is developed. In this system part process plan is made by the semi-intelligent method, this method uses the feature reasoning, feature process chain searching and man-computer talking together;(5) The main structure of the HOPE system is introduced, a shaft drawing and its process plan made by this system are shown, the data process problem in process drawing making is also discussed;(6) A new method of describing process rule is introduced, this method uses IfThen rules and neural nets weight values together to describe process rules, the BP algorithm is adopted in this method;(7) The optimal machining sequence problem of the process steps on the same fixturing is discussed, optimal algorithms SA is applied to solve this problem, the result shows that this method is more efficient than the traditional method;(8) All jobs in the thesis are summarized. In order to carry out the research in the future, some rational proposals are given.

全文论述的内容主要有下列几个方面：(1)较为系统地阐述了CAD／CAM一体化工程项目中CAPP系统的主要功能模块及其信息流程，在分析工艺设计过程的基础上，提出了基于特征原型的渐进式工艺设计方法，并探讨了该方法的应用前景；(2)研究了零件特征提取的原则和方法，在成组技术的基础上，开发了一套基于特征的分类编码系统，并在提取零件特征的基础上，定义了零件特征的数据模型，开发了基于轴类零件特征的参数化设计系统；(3)研究了基于特征的CAD／CAPP集成的方法，通过定义零件特征数据模型的存储结构，开发了将设计数据转换到工艺数据库中的接口程序，为后续的CAPP系统提供必要的零件形状和工艺信息；(4)研究了基于特征的工艺推理方法，将Mycin算法应用到工艺决策中，开发了基于特征的工艺推理及工艺方案生成系统，在系统中综合运用特征推理、特征加工工艺链查询及人机对话相结合的半智能化方法确定零件加工工艺；(5)介绍了整个HOPE系统的总体结构，通过运行HOPE系统绘出了一轴类零件的零件图，并生成了该零件的加工工艺方案，初步探讨了基于特征的工序图生成技术中数据处理问题；(6)研究了工艺设计过程中知识如何有效表示的问题，提出了将显式的IF-THEN规则表示与隐式神经网络权值表示相结合的工艺知识表示方法，并利用BP算法进行了工艺知识表示的初步研究；(7)研究了工艺设计过程中同一安装下工步优化排序问题，利用神经网络中基于模拟退火的理论来解决该工步优化排序问题，实践证明该方法较传统的算法具有更高的效率；(8)总结了本文所进行的研究工作，为今后进一步开展工作提出了较为合理的建议。

Along with the socialist market economic system, deepening and further refined in the construction field, project legal system, the bidding system, construction supervision and contract management system, implementation of the system, business self-quotation, the market price of the construction of the formation of Project Cost management system is taking shape.

而随着社会主义市场经济体制的不断深化和进一步完善，在工程建设领域，项目法人制、招标投标制、建设监理制和合同管理制的推行，企业自主报价，市场形成价格的建设项目工程造价管理体系正在形成。

Mainly for power system automation, power electronics, power equipment, online monitoring and condition-based maintenance, smart appliances, such as professional orientation, and products are mainly including the pumping station integrated automation system, data pass business platform, power management systems, substation automation system, power generation plant electric automation system, power system equipment, the main-line monitoring and condition-based maintenance systems, distribution network automation system, such as near 10 species, widely used in electricity, water, petrochemical, metallurgy, railway and other industries, the product has achieved a modular, standardized, seriation, the main technology in the domestic and international advanced level of similar products.

主要面向电力系统自动化、电力电子、电力设备在线监测和状态检修、智能电器等专业方向，产品主要包括泵房综合自动化系统、数据通业务平台、电量管理系统、变电站自动化系统、发电厂厂用电自动化系统、电力系统主设备在线监测和状态检修系统、配网自动化系统等近十个品种，广泛应用于电力、水利、石油化工、冶金、铁路等行业，产品已实现了模块化、标准化、系列化，主要技术处于国内、国际同类产品的先进水平。

The paper is organized as follows: First, we will give a brief introduction and history of the Human-Earth system and present the method to analyze the regional HE system using PRED model. Then, the indicator system is introduced for the PRED model. Third, the present HE system is studied in details. Fourth, the indicator system is analyzed. Finally, the solutions are proposed for the problems in Shannxi HE system.

本文通过五个方面来论述：第一，介绍了人地协调系统的含义、发展历程以及PRED构型；第二，建立了区域PRED的协调评价指标体系以及对区域人地协调系统进行分析的方法；第三，分析了陕西省人地协调系统的现状；第四，对陕西省的PRED指标体系进行分析；第五，针对陕西省人地协调系统存在的问题提出对策。

Then, aerodynamic parameters in different flight conditions are used to imitate the uncertainty of the system, and the digital simulation of closed-loop system designed is performed. The results show that the system can accomplish asymptotic decoupling of roll angle, sideslip angle and head-on angle for aircraft, and the system is provided with the function for restraining uncertainty in the system. This illustrates that the flight control system designed has not only good decoupling characteristic, but also better robustness.

然后用不同飞行条件下的空气动力参数变化来模拟系统的不确定性，并进行闭环系统数字仿真，结果表明，所设计的控制律不仅可实现对飞机滚转角、侧滑角、迎角等的渐近解耦控制，而且对系统不确定性具有较强的抑制作用，说明系统具有较好的解耦性和较强的鲁棒性。

Firstly, on the basis of summarizing related research home and abroad, this paper introduces the Kano model, defines the characteristics of food quality from natural quality, expected quality and charming quality; Based on the study of the concept of system, management system and quality management system, this paper defines the concept of quality management system of food safety; it also studies the supporting relationship of GMP, SSOP and HACCP system, as well as the feasibility of the integration of the ISO 22000 standard and the ISO9001 standard, which lay a theoretical foundation for the establishment of quality management system of food safety.

本文主要研究工作如下： 1、在综述国内外相关研究成果的基础上，引入Kano模型理论，从理所当然质量、期望质量和魅力质量三方面对食品质量的特性进行了界定；在研究体系、管理体系、质量管理体系概念的基础上，对食品安全质量管理体系的概念进行定义；研究了GMP、SSOP与HACCP体系的支撑关系以及ISO22000标准与ISO9001标准整合的可行性，为超市食品安全质量管理体系的构建研究奠定理论基础。

The study apply economic cost-benefit analysis, environmental impact economic cost-benefit analysis and system theory, and using the analysis methods such as Analytic Hierarchy Process, the Key Performance Index Analytic Method and Delphi Method.

本项研究应用经济损益分析、环境影响经济损益分析、系统论等理论，利用层次分析法、关键绩效指标分析法、专家咨询法等分析方法。

Sparse eigenvalue analysis technique, which makes full use of sparsity of augmented state matrix during small disturbance stability analysis for large scale power system, can compute out concerned eigenvalue subset from all eigenvalues and can analysis power systems that have arbitrary scales.

论文的主要研究工作和创新性成果如下：1针对传统特征值分析方法仅适用于中小规模电力系统的局限性，结合Prony和稀疏特征值算法，提出了一种大规模互联电网区间低频振荡分析的实用方法。

This paper analysis the interaction inside of two-electron atomic system by using Bohr Theory and the method of theoretical analysis, and presents a quantitative analysis, and discusses the feature and characteristic of energy level and spectral about two-electron atomic, based on the experimental data offered by China Basic Science Data Center.

运用玻尔理论，通过理论分析的方法，分析双电子原子体系内部间的相互作用，并根据中国基础科学数据中心提供的实验数据对双电子能级和跃迁的光谱作了定量计算，讨论分析了双电子原子能级和光谱的性质和特点。

The development process of ST800A coin counting machine was introduced from three aspects such as the entire machine modeling analysis and design, the man-machine system analysis and design, and the color plan analysis and design.

主要从整机造型分析与设计、人机系统分析与设计及色彩方案分析与设计3个方面，较为详细的阐述了ST800A型硬币清分机造型设计的研发过程。

Chinese traditional virtue is humility and wariness,the compliment and praise to the others should be declination

中国人的传统美德是谦虚谨慎，对别人的恭维和夸奖应是推辞。如

We bought this house on the never-never.

我们以分期付款的方式买下这座房子。