关系数据系统

A NF2 extended data model with object—oriented features is presented, and its semantics is formally described. The data model has the following features. Its database schema has NF2 extended structures, the data values can be either atomatic or composed by'set'and'tuple'constructors with a fixed order. The'table'concept unifies classes and relations.

该模型的主要特点有：数据库模式是扩展的非一范式结构，数据值既可以是原子的，也可以通过构造符set，tuple以特定的顺序反复复合而成；用表的概念统一了类和关系；对象标识既可以由用户定义，也可以由系统定义。

In the inductive period of the polymerization, the rate is proportional to the second power of the potential, but in the autocatalytic period, the rate is only proportional to the potential.

在一系列的聚合电位下制备了聚苯胺修饰电极，得到聚合电位与PA膜电化学性质的关系，达到通过控制聚合电位来得到不同电化学性质PA膜的目的，为PA膜研究中聚合电位的使用提供了较为系统的数据。

In order to understand the influence by the Three Gorges Project and supply basal information of estuary environment before sluice, a study was carried out on the Changjiang Estuary and its adjoining area from 1998 to 2001. This paper discussed mainly the influence by the Three Gorges Project on estuary environment of the Changjiang River. This paper analyses the hydrophysics, deposit environment, hydrochemistry, primary productivity, plankton, benthon and fishery resources of the Changjiang Estuary and its adjoining area, and further the relationship between the environment and runoff of the Changjiang Estuary.

根据调查数据，结合历史资料对三峡水库蓄水前的长江口及邻近海域水文物理、沉积环境、水化学、初级生产力、浮游生物、底栖生物和渔业资源进行了全面分析，并进一步阐明了长江口生态环境与长江入海径流量间的关系；提供了三峡水库蓄水前长江口生态与环境的基础资料，对长江口生态系统健康度作出评价，为长江口生态环境保护与可持续发展奠定了良好的基础。

Generally, there are consanguineous relationships between financial crimes and the flow of funds, especially in money-laundering.

金融犯罪一般和账户的资金流动有着紧密的关系，特别是在洗钱活动中表现得尤为突出。目前，大多数的异常侦测系统采用的是传统知识发现方法，首先对数据集进行调查，形成感兴趣的假设，然后再设计分析方法来解决这些问题。

The relation between the coseismic changes of water level and water temperature of artesion well has been analyzed by use of the coseismic data of Ms8.7 Sumatera earthquake and the structure information of well-aquifer system in the studied area. The physical model is established by simulating the changes of water temperature and water level of the well. The mechanism of coseismic response to distant earthquake in such artesian well is also revealed.

利用本溪自流井水位及水温对苏门答腊Ms8.7大震的同震响应资料，通过分析水位变化与水温变化的相互关系和研究区的井－含水层系统结构，建立了不同层位地下水混合的物理模型，并根据水位变化数据模拟出水温变化曲线，同时也揭示了同类型观测井水位与水温对远场大震的同震响应机理。

According to the testing deflection basins measured using Falling Weight Deflectometer of semi-rigid pavement on the experiment pavement, the structure layer moduli of asphalt pavement is backcalculated according to the principle of system identification method.

利用落锤式弯沉仪在实验路段的实测弯沉数据，采用系统识别方法对沥青路面结构层模量进行了反算，进而分析了沥青路面弯沉及反算模量与其代表温度之间的相关关系，并建立了相应的温度修正公式。

Study on the driving forces of land use/cover temporal-spatial change. On the basis of the systematical study on natural and social-ecomic factors including climate, population, technology and affluence status etc. during the past 50 years in this area, the multivariate statistics simulation models of LUCC were developed for two periods of 1950's-1980's and 1986-2000 respectively. Then, the Thiesson polygon method was used to the spatial allocation of soci-economic factors, thereby the spatial relationship between land use degree change and socieconomic factor variation was detected within GIS. Based on the analysis of the integrative characters in different geographical divisions, the electivity index was employed to describe the possible impacts of the natural landscape structure on spatial differentiation of land use transition. At last, correlation analysis between major roads and the distribution of land use change was made.

分析近50年气候资料和人文因子在不同年代的变化特点，系统地研究了气温和降水等自然因子和人口、农牧业发展、经济状况等人文因子对区域土地利用变化的影响；从时间序列的角度分析了50年代至80年代初和80年代中期至2000年两个时段土地利用／土地覆被变化的驱动因子，在相关分析的基础上，分时段建立了区域土地利用／覆被变化的自然-人文影响统计诊断模型；针对不同经济类型区选择典型县，分析近15年土地利用变化外在人文驱动力的区域相似性和差异性；尝试以THIESSEN多边形方法进行社会经济统计数据的空间化处理，探讨了土地利用程度变化与人文因素变化的空间相关关系；以优先指数模型和土地利用类型转化率与距交通干线距离的相关模型分析了景观自然与人文结构对土地利用空间转化过程的影响。

On the basis of analysis of the movement characteristics of horizontal layered foundation and the relationship between soil parameters and eigenvalues and eigenvectors of the soil system, frequency domainid entification method of the layered foundation parameters is suggested by correcting the deviation between the measured soil data and theoretical calculation results.

在分析水平层状地基运动特征的基础上，通过研究地层系统的特征值和特征向量与地层参数之间的关系，修正测量得到的数据与理论计算结果之间的偏差，建立了层状地基参数的频域识别方法。

Based on the method of well-logging multiscale analysis, the multiscale characters and the fusion of logging curves under different scales are studied systematically to extract the multicycle features of strata and to establish the corresponding relation between logging data and strata and therefore the improved logging data can be better applied to the evaluation of sequence stratigraphy. Based on the multiscale analysis theory of wavelet, single logging curve is processed through multiscale analyzing.

本文旨在利用建立的测井多尺度分析方法，系统研究测井信号的多尺度特性和不同测井曲线的多尺度信息融合，从原始测井信号中提取出地层的多旋回特征，建立测井数据向地质目标的映射关系，以期将测井资料更好地应用于层序地层评价。

By revealing the relationships among the index system, key factors and direction of the program, a new model which was composed by data-standardization, GM(1, 1) in the theory of gray System and the frame for assessment was put forward so as to reduce the influence of this obstructer to some extet.

在深入研究考核指标体系、关键因素和规划方向三者之间关系的基础上，提出一个由&数据标准化&、灰色系统理论的GM(1，1)和评估框架构成的模型，以期在一定程度上减少信息不对称性的影响。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。