This ability to use both dynamic sql and sprocs with a clean data model layer is pretty powerful , and provides a great deal of flexibility when working on projects 这种数据模型的既能调用动态sql又能调用存储过程能力是非常强大的，并且在对对象的操作上它提供了强大的灵活性。
If a class is correctly implemented , which is another way of saying that it conforms to its specification , no sequence of operations reads or writes of public fields and calls to public methods on objects of that class should be able to put the object into an invalid state , observe the object to be in an invalid state , or violate any of the class s invariants , preconditions , or postconditions 如果一个类实现正确(这是说它符合规格说明的另一种方式) ，那么没有一种对这个类的对象的操作序列(读或者写公共字段以及调用公共方法)可以让对象处于无效状态，观察到对象处于无效状态、或者违反类的任何不可变量、前置条件或者后置条件的情况。
The construction of virtual lab is very important for senior profession education and practice , students can enter the practice field any angles by operating the computer , in this field , the students can carry through the essential experiment object , it is also can realize the connection and amend the parameters , by operating the experiment object , the experiment is obtained almost near to the actual field , and gain the same effect of theory and practice in the course of the remote education 以上虚拟实验室的构建，对高职远程教育及职业培训特别重要，学生通过操作电脑从不同角度进入实验(或生产)现场，在这种虚拟的现场，学习者可以与实验对象进行必要的交互，完成对实验对象的连接及进行参数修改等，通过对实验对象的操作，获得与实验(生产)现场几乎相同的体验，达到在远程教育过程中，理论与实践同步的教学效果。
The real - time data characteristic and transaction characteristic was examined in detail . a set of real - time data model consists of a set of data object , also the restriction on it and manipulation of it . the event model in active real - time system includes the category , description and manipulation of it 其中功能特征中阐述了实时数据特征和事务特征，为实时数据模型的建立提供了基础；一组实时数据模型由一组数据对象及其结构、一组关于这些对象的限制以及一组施于这些对象的操作所组成；主动实时系统的事件模型包括了事件的分类、描述和对其的操作。
According to whether the object concerned has the attribute of time , the operations for spatio - temporal objects can be divided into two classes , one generated directly from the temporal types , and the other generated from the non - temporal types , which act on spatio - temporal objects at last after temporal lifting 根据操作对象是否具备时间属性，时空对象的分析操作分为两大类：一类是直接基于时态数据类型而产生的操作；另一类则是由产生于非时态数据类型、经过时态提升后作用于时空对象的操作。
The concept of rsdd can solve the conflict between the infinite precision real numbers of spatial object and the finite precision number systems of computers . then we can preserve the closure of spatial operations and rsdd spatial data types . for the closure of spatial operations about ros , we have studied the intersection between rpos and gained the restructure algorithms , i . e . , redraw a rpo - line , reconstruct a rpo - plane , and reconstruct a rpo - solid 为了保证基于rsdd对象ros在进行几何运算时的封闭性，论文研究了对均匀空间离散域基本对象相交情形的调整算法(重画一条线、重构一个面和重构一个体)以及对均匀空间离散域对象的操作算法(插入一个rpo - point的算法、插入一条rpo - line的算法、插入一个rpo - plane的算法和插入一个rpo - solid的算法) 。
On the basis of above - mentioned introduction , this thesis tries to synthesize asp technology , ado , script programming and com , and integrate webctrl control and ie browser together , so as to realize the script ' s action on graph objects by programming of the script to those exposed interface of webctrl . then combines internet technology and industrial monitoring and control system together , and makes the best of the latent energy of the computer network , thus comes into being the dynamic updating of industrial monitoring picture based on browser 在此基础上，本论文尝试了在综合asp技术、 ado组件、脚本编程和com的前提下，将自开发控件和ie浏览器集成在一起，通过对控件暴露的接口进行脚本编程实现对图形对象的操作，并充分发挥计算机网络的潜能，将internet技术与工业现场监控系统结合起来，从而形成一种新的基于浏览器的工业现场实时监控画面的动态更新。
