面向对象设计

Use cases are a necessary artifact of object-oriented application system design and development.

用例是必要的工件对象面向应用系统的设计和开发。

The software and hardware realizing scheme of high performance, AC servo system based on the digital-analog mixed type of 16 bits high performance, single piece micro computer 80C196 is presented in this paper It expounds the theory and method of system design for industrial applications, and it also gives out the situation of system industrial applications Based on the analysis of the influential characteristics of servo system the method of improving the system precision, estimative model of loading torque and instantaneous velocity, compensative predictive control under low speed motion are dicussed in this paper.

论述了面向工业对象的系统设计原理与方法。并给出了本文系统工业应用的情况。在分析影响交流伺服系统性能的基础上，提出了改善系统精度的方法，给出了负载力矩和瞬时转速的估计模型，研究了低速运行时的补偿预测控制，提高了伺服系统低速稳定运行的范围。

The methodology classified the objects of module partition to improve the flexibility and maneuverability. In addition, the methodology focused on research of module partition method, which faced the category of "modular transformation of the existing products ". The methods commendably meet the current needs of enterprises and have strong practical significance. In the end, presented the corresponding mathematical methods.

针对两类方法的优缺点，提出了一种柔性化模块划分方法，该方法突出了模块划分的对象分类，在提高划分方法柔性的同时，也更具可操作性；并着重研究分析了"面向已有产品模块化改造"范畴的模块划分分组方法，并明确了相应的谱系聚类数学方法，该方法较强地适应了当前企业的设计需求，具有较强的实践意义。

In all four collaborative design forms, the implementation of synchronous and multiaddress collaborative design is most difficult....

在四种不同的协同形式中，实现同时异地协同设计的技术难度最大；在不同的协同设计对象中，实现面向三维实体模型的协同设计难度最大。

In all four collaborative design forms, the implementation of synchronous and multiaddress collaborative design is most difficult. Collaborative design with three-dimensional solid models is more difficult realized than collaborative design with some others such as text files.

在四种不同的协同形式中，实现同时异地协同设计的技术难度最大；在不同的协同设计对象中，实现面向三维实体模型的协同设计难度最大。

The paper sees Horton code as a primary characteristic value and generalizing condition of the river network, and selects, simplifies and generalizes river based on scale of before and after generalization,, The main contents of paper include:(1)Reviews generalization concept, arithmetic operators, methods, influence factor and frame of map generalization and design, analyze core theory of feature —oriented map generalization, discuss the main context and applicable method of river feature generalization(2) Summarizes natural form and spatial configuration characteristic of the river network, and describe the river network using digraph Paper mostly researches tree —like river, identifies the direction of river based on the angle of the main and secondary reach, and identifies the main river based on most length and predominant continuation of the flow direction along the major channel , then receives the grade of river by recursion and structuralize river network, builds hiberarchy rank system of river based on Horton coding(3)Designs the model of river network based on Horton code, and organizes the data of node, branch and river.

本论文把Horton编码作为水系网的一个主要特征值并以此作为综合条件，并根据综合前后的比例尺对水系网进行选取、化简和概括。论文的主要工作包括：(1)总结地图综合的概念、算子分解、实现方法、主要影响因素和总体设计框架，分析面向地理特征的制图综合的核心理论支撑，在此基础上讨论水系专题要素综合的主要内容和综合适用的方法。(2)总结水系网的自然形态和空间结构特征，用图论对水系网进行描述。以树状水系作为主要研究对象，依据树状水系的主支流交汇关系确定水系流向，依据水系中主流的长度最长和主流保持原有的流向趋势确定主流，按此递归得到河流的不同级别，对基于河段组织的水系网结构化，自动建立水系的Horton编码。(3)设计基于Horton码的水系网模型，对结点、河段、河流和河系的数据进行有效的组织。

On the basis of modeling orienting to the object of power system, the design concept of graphic plotting module and data processing module is proposed.

在面向电力系统对象的数据建模基础上，阐述了图形绘制模块和数据处理模块的设计思想。

The centralized meter reading system using "Client/Server" model and established the meter logical device, object interface model based on "Connect-Oriented" TCP Service, then, designed the function module and data frames of ammeter according to OBIS system, finally, realized the communication between PC station and meter server using DLMS/COSEM protocol.

本系统以&客户机／服务器&为模型，在面向连接的TCP传输服务的基础上，按照DLMS／COSEM应用协议标准创建电能表逻辑设备，对象接口模型，并依照OBIS系统设计电能表应用功能模块和数据帧，实现PC管理主站和嵌入式电能表集中器之间的DLMS／COSEM网络协议通信。

The class syntax and design are based mostly on Smalltalk, one of the first object-oriented programming languages.

类的语法和设计都是基於第一个面向对象的编程语言Smalltalk。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。