查询词典 data base

On the base of reviewing the development of NSP models, some deficiencies of existent models are analysed and listed as follows: most models can be applied only to very small watershed; mechanism models involve too many parameters which can not be calibrated properly by limited data; amoung practical models, empirical models are much more common than mechanism models; most models are focus on the conservative soluble pollutants rather than non-conservative and particulate pollutants; almost all models rely highly on the measured data, and there are fewer studies about the load estimation for ungauged areas.

本文在评述非点源污染模型研究进展的基础上，分析了现有模型的不足，主要有：大多数模型只能适应于很小的流域面积；机理类模型参数过多，率定困难，应用效果不理想；实用模型中，经验类模型多，机理类模型少；对保守性的液态污染物研究得较多，对非保守性和固态污染物研究得较少；各类模型均高度依赖于实测资料，无资料地区的模型或预测方法研究得很少。

In this paper,we use geostatistics to analyse special variability of soil salinity in Yanqi Basin of Xinjiang base on soil salinity data,and then we predict and draw the soil-salinity-class maps including unsampled region,it shows: the soil salinity data's Cv are not less than 100% and have very strong special variability;the spherical model f...

在焉耆盆地大规模的土壤取样、试验分析盐分数据的基础上，采用地统计学的方法对研究区的土壤盐分进行了空间特征变异分析，并采用普通克里格插值法制作出焉耆盆地的土壤盐分空间数字地图，结果表明：研究区各层土壤盐分变异系数均大于100%，具有强空间变异性；对土壤盐分进行半方差函数计算分析，发现拟合的理论模型均为球状模型，各层土壤盐分表现出强烈的空间相关性；土壤盐渍化程度在水平方向的分布与地形地势的关系密切，在垂直方向则表现出强烈的表聚特性。

ISO 10303, is issued by international standardization organization, and here, this paper gives the definition of product structure model oriented part41 and part44 in STEP and content of product structure management in PDM. This paper also presents method of creating and extracting product information on engineering draught and product data exchange and integration between CAD system and database manager system. Moreover, the paper gives a method of organization and manager of data base on product structure.

论文中依据国际标准化组织颁发的STEP标准即ISO 10303中的Part41，Part44两部分内容以及PDM中有关产品结构管理方面的功能含义定义了产品结构模型，实现了工程图样中产品管理信息的建立和提取以及数据库系统与图形文件中的管理信息交换与集成，并以产品结构为核心组织和管理产品结构模型数据。

This research achievements is the result at the base of field geologic data colligating with the data of some drilling and seismic, and of the combining of sedimentology and tectonic geology researches, theory and practice researches, actual measurement of skeleton sections and observation of complemented sections, macroscopical studies and microcosmic studies. The classification and characteristics of sedimentary system and the genetic types and expression form are systematically analyzed in the thesis, and the division scheme of the Youjiang basin is put forward.

研究成果是以大量的野外地质资料为基础，综合了部分钻井和少量地震等资料，采取沉积研究和构造研究相结合、理论研究和实际研究相结合、实测基干剖面与补充观察剖面研究剖面相结合、宏观研究和微观研究相结合的方法，系统地分析了右江盆地的沉积体系种类和特征、层序界面的成因类型和表现形式，进而提出了右江盆地的层序划分方案。

A data base is a large group of stored, integrated (cross-referenced ) data usually organized in files.

一个数据库就是一大组存储起来的，集成的的数据，通常它们被组织在文件中。

Collecting the explosive data in the past, building an example of data base, and we can analyses the detonating parameter that system designs.

搜集以往的爆破资料，建立实例数据库，与系统设计的爆破参数进行类比分析。

On the platform of VB6.0 and Microsoft Access, by studying the measurement methods and data processing principles of differential pressure meter, base point's method with air gauge and double point's method with air gauge, data processing software was developed about resistance measurement for mine ventilation.

在研究压差计法、气压计基点法和气压计双测点法3种常用矿井通风阻力测定方法及其数据处理原理的基础上，以VB程序语言和Microsoft Access数据库管理软件为平台，开发了矿井通风队力测定数据处理软件。

Animals data base for energy potential estimation model and farmer survey data were used in this study to investigate the estimation of Chinese rural household biogas production. On this basis, the biogas yield, family energy consumption, economic profit, and environment profit were compared between biogas household and non biogas household. The results showed that the average biogas yield of Chinese rural household was 450 m3, under 9 months normal working period annually.

该文利用能值潜力估算动物数据库的模型理念，并结合实地调查数据，探索了2007年中国农村户用沼气池产气量的估算方法，在此基础上对比分析了沼气池建设前后，农户家庭能源消费结构、能源经济支出和生态环境的差异。

The opened 4-layer structure data exchange model was put forward on base of analyzing other net data exchange protocol in order to ensure the reliable communication .

针对家庭控制网络的特点，在分析其它家电控制协议的基础上设计了四层网络结构的开放型数据交换模型，并且设计了控制网络数据通信协议，以确保通信的可靠性。

Telling us how to apply data-base,software engineering,data structure and programmer knowledge to complish a simple project.

讲述了怎样综合应用数据库原理、软件工程、数据结构和程序设计这些学科的知识，构造一个简单的工程。

"The operators will suffer a temporary decrease in the number of consumers and short message services as people may not like having to provide their ID cards for a phone number," Xu Junqi, vice-dean with the Policy-Making Institute of the Telecommunications Research Centre under MII, said yesterday.

信息产业部下属的通信决策研究院副主任徐俊其昨天说：&实行手机实名制后，人们可能不太情愿用身份证注册手机号，所以通信运营商会暂时面临用户减少和短信用户减少的问题。&

I don't believe in make-believe!

我不相信这些虚构的故事。