数据库

Make design of database system can carry out the management of the general database.

使得设计的数据库系统能够实现一般数据库的管理。

RESULTS: The numeric type timing variance would be obtained in database with the way of variable chronometry. The timing would be kept as a document of textual form with the way of document chronometry. All the operations would be counted time with the above ways. CONCLUSION: EpiData has the function of counting time.

结果：变量计时法可以直接在原数据库中得到数值型计时变量，文件计时法则将计时结果另存为文本格式的文件。2种方法均能实现对每个变量、每条记录、每次操作数据库的数据录入过程进行计时。

It Have apleasant interface, support remote control, regime MODE Z, it can work with the databases mySQL, PostGreSQL through ODBC for storing the user stock-taking records, the expansion of functionality of program with the aid of the externalmodules is supported, it is translatedin 10 languages, support work with virtual catalogs, and 128 bit SSL ciphering.

它有一个愉快的接口，支持遥控、政权模式的Z它可以同MySQL的数据库，透过ODBC的PostgreSQL数据库存储用户盘点记录扩充功能方案与对外援助的模块支持，它是用10种语言翻译，支持与虚拟目录、SSL的128位加密。

The function design of system includes writing down amendment and pretreatment about spatial database and attribute database. This system provides common and basic functions of GIS. Besides, we can make out the topographical maps, planimetric maps and skiagraph , structure objects of highway construction of design and can inquire two-way between spatial information and attribute information. The system apply Earned Value Method to perform the correlative property to classification statistic.

系统功能设计包括空间数据库和属性数据库的录入、修改以及预处理；系统还提供了一般GIS系统应具备的基本功能，并在此基础上进行涵盖公路设计施工的地形图、平纵缩图、构造物等图形信息与属性信息的双向查询，并运用挣值法等对相关属性进行分类统计以供有关公路工程项目的各方使用。

This article detailedly expatiated upon the principles, contents and methods of cropland classification; it analyzed the necessity to combine the work of cropland classification with GIS technology, summarized the attributions of ARC/INFOand some other related softwares; it established the technologic route of cropland classification supported by GIS, by a case study in Liwu Town,Li County Hebei Province, this article expatiated the practicable mechanism of combining the function of ARC/INFO with the work of cropland classification, and put forward some new ideas and approaches of utilizing GIS: this paper put forward the idea of coding the polygons in the basic graphic database such as soil map and land use map according to their attributes, and put forward the detailed coding project; based on the code databases, it expatiated upon the detailed approaches to create single梖actor map and output the final classification map; it put forward the principles and the method of creating classification units in the environment of GIS, that is how to keep the lines of soil polygon, the border of districts and the important objects such as residential areas, banks of rivers and roads ,and how to overlap single梖actor soil map and land use map, and to delete some vector lines of the overlapped map appropriately; it detailed the methods of creating mathematic model of classification coefficients in the environment of computer, and used FOXPRO6.0 programs to realize the automation of calculating coefficients; it represented the method of plotting the final map by overlapping various coverages according to the code tables and lookup tables, the process of outputting the cropland classifying map was finished by program.

本文法对耕地等别划分的原则、内容及方法作了较详细的阐述，介绍了多系数综合修正法的耕地等别计算方法及其具体应用和AHP的确权方法；分析了耕地等别划分工作与地理信息系统技术相结合的必要性，简要介绍了地理信息系统软件ARC／INFO及其他相关软件的功能特点，制定了地理信息系统支持下耕地等别划分的技术路线，通过对河北省蠡县蠡吾镇的实证研究，重点阐述了ARC／INFO及相关数据库软件与耕地等别划分结合的有效机制及GIS应用的一些新思想、新方法：提山了对土壤图和土地利用现状图等基础图形数据库进行特征编码的思想和具体的编码方案，阐述了基于与图形库相链接的特征编码表，单因素图提取、成果图的输出的具体实现方法；提出了GIS环境下耕地单元划分的原则和方法，即在保留土壤因素图斑界线、行政界线和重要地物等的原则下，将土壤单因素图和土地利用现状图进行拓扑叠加，对叠加图中的矢量线进行适当的删除；阐述了在计算机环境下，耕地分等参数计算模型建立的方法，并用FOXPRO6.0语言程序实现了参数计算的自动化；阐述了根据图形库特征编码表和建立绘图符号查找表，按不同图层叠加绘制成果图的方法，该过程用命令程序实现耕地等别图的输出。

The system integrates the successful cases, design knowledge and experiences accumulated by enterprises and improves the practicability and intelligence of the coiler design system.

通过分析数据库中历史设计与当前设计需求之间的相似度，从产品数据库中提取最相似实例，达到设计资源复用的目的。

If you want to access a database multiple times, you should establish a connection using the Connection object. You can also make a connection to a database by passing a connection string via a Command or Recordset object.

如果你想多次访问数据库，你可以使用Connection对象建立一个连接；你也可以通过一个指令或记录对象传递一个连接字符串从而来创建一个到数据库的连接。

There are many collecting methods to get information and it is most important to get it by internet, network database and compact disc database.

竞争情报的搜集方法有很多，在网络环境下，通过因特网和网络数据库以及光盘数据库获得信息显得尤其重要。

This paper introduces the development of Database system and multidatabase system compendiously.

文中简要介绍了数据库系统、多数据库系统的发展。

This paper firstly introduces the concept of least function dependence set and the minimal fixed point theory, and then analyzes the relation between closure of function dependence set and complete lattice, and puts forward analyzes a concrete solution of least function dependence with use of minimal fixed point theory.

本文尝试采用严密的逻辑方法，利用最小不动点理论去求解最小函数依赖集。1最小函数依赖集(1)函数依赖一个数据依赖是关于关系数据库中关系的属性值之间的相关关系的一个命题，它规定了一个关系数据库的规范所满足的完整性约束条件。

The reasons of iron ions content overproof in grade Ⅱ desalting water system,such as variation water quality,contamination of regenerant , operation adjustment of pretreatment system and switching operation of bed were discussed.

对二级脱盐水系统中铁离子含量超标的原因，如来水水质发生波动、再生剂受到污染、预处理系统操作调整、床体运行切换等进行了论述。

You were hired to drum up new business, so go and do it.

公司雇你招徕新业务，你就做你的事好了。