关系数据系统

Their research focused on to introduce the theory of foreign and analyze descriptively the practice of domestic enterprises, some scholars took the empirical

所以，本文选取我国深交所上市的109家制造业企业2004-2006年的相关数据进行系统分析，检验了多元化程度与其经营业绩关系的理论假设，发现中国制造业企业多元化程度与经营业绩存在负相关关系，并对此进行了理论和经验解释，以期为中国企业的多元化战略实践提供理论支持。

To solve this problem,the equivalence relation of rough set theory is replaced by an asymmetrical similar relation,and from this relation,an asymmetrical similar matrix is defined,then a new heuristic algorithm with less space complexity that require core and knowledge reduction based on asymmetrical similar matrix is proposed,and an example is given to confirm the validity of the algorithm.

用非对称相似关系代替粗糙集理论中的等价关系，定义了非对称相似差别矩阵，提出了基于非对称相似差别矩阵的高效求核和知识约简算法。该算法无需改变初始不完备信息系统的结构，能直接处理缺省数据。实验结果表明，新算法所获得的决策规则简洁、高效，与缺省值无关。

The structural and mechanical properties of ring-spun yarn have been studied comprehensively. The relationships between yarn linear density, yarn twist, and the relative yarn structural and mechanical properties have been obtained. Through statistical analysis of yarn linear density, twist, and strength of 200 groups of pure cotton yarn, and considering some influence factors, such as carded or comed, application of long-staple cotton, experiential functions of yarn relative strength with yarn linear density and twist have been obtained.

对环锭纱结构力学性能进行系统研究，得出环锭纱的相关力学性能参数与纱线线密度和捻度的关系；通过对从工厂收集的200组纯棉纱线线密度、捻度、强力等数据的统计分析，并综合考虑纱线线密度、是否精梳、是否使用长绒棉等因素，得出了线密度和捻度与纱线强力相对值的经验函数关系。

Based on leaf area measurement experiments on six main cultivars Strawberry in southern of Jiangsu province, using DPS data processing system to analyze the relationship between "leaf length - leaf width - leaf area", and getting to regression equations of these six kinds of strawberry on "leaf length × leaf width" and on leaf area; and setting up a common regression equation through combination of data.

本文基于对江苏南部6个草莓主栽品种叶面积的测量试验，用DPS数据处理系统对其"叶长-叶宽-叶面积"之间的回归关系进行分析，得出这6个草莓品种的叶长×叶宽与叶面积回归方程；并经过数据合并建立了一个通用的回归方程。

Based on leaf area measurement experiments on six main cultivars Strawberry in southern of Jiangsu province, using DPS data processing system to analyze the relationship between "leaf length-leaf width-leaf area", and getting to regression equations of these six kinds of strawberry on "leaf length × leaf width" and on leaf area; and setting up a common regression equation through combination of data.

基于对江苏南部6个草莓主栽品种叶面积的测量试验，用DPS数据处理系统对其"叶长－叶宽－叶面积"之间的回归关系进行分析，得出这6个草莓品种的叶长×叶宽与叶面积回归方程；并经过数据合并建立了一个通用的回归方程。

Based on collected drill hole materials and predecessor publication\'s dates on seabed sediments physical and mechanical characters in the Yellow River subaquatic delta,the distribution and engineering geological nature of this area sediments are studied systematically;though the analysis geotechnical achievement tables and compression curves of those data,the layered summation was used to calculate the final subsidence quantity;Terzaghi consolidation theory was calculated and the Plaxis software was simulated subsidence with time changes;based on measured dates and other method,the quantitative analysis results were verified,Finally this study analyzes influencing factors and proposes control measures and proposals.

本文通过收集的钻孔资料以及前人发表的黄河水下三角洲海底沉积物物理力学数据，对研究区的沉积物分布，沉积物工程地质性质进行系统的研究；通过对调查资料中的土工试验成果表以及压缩曲线分析，采用分层总和法计算最终沉降量，采用太沙基固结理论计算和Pl(来源：ABCe2论文网www.abclunwen.com)axis软件模拟沉降随时间的变化关系；通过实测数据以及其它方法验证定性分析得出的结果，最后分析引起地面沉降的因素，并提出地面沉降的控制措施和建议。

The results of the analysis to complete 18S rDNA and partial 28S rDNA D 6-7 domain sequences of 30 collembolan species supported the monophyly of Poduromorpha and Symphypleona, Entomobryoidea is not a monophyly, familia Neelidae should be separated from Symphypleona. The situation about the superfamilia of Tomoceroidea and the familia Neelidae need further studies. The results of the further analysis to complete 18S rDNA and nearlly completely 28S sequences of 4 Protura, 6Collembola, 5 Diplura, 5 Insecta, 10 Crustacean, using 1 Myriapoda and 1 Chelicerata as outgroups indicated that Protura, Collembola and Diplura are monophy, respectively, Protura and Diplura have the nearest realationship, they make sister groups with Collembola and all of them assemble with Insecta to make a monophy cluster of Hexapod; The results support the monophy of Pancrusracea, Crustacean is not a monophy cluster and the realationships between them with Hexapod need further reseachers.

对我国的14科27属30种跳虫的18S rDNA全序列和28S rDNA部分序列(D6-D7)的基因信息数据进行分析，结果支持原目、愈腹目的单系性，长角目不形成单系群，支持短角科从愈腹目中分出，但鳞总科和短角目的分类地位有待于深入分析探讨；进一步比对4种原尾虫、6种跳虫、5种双尾虫、5种昆虫和10种甲壳动物的18S rDNA全序列和28S rDNA全序列，以1种多足动物和1种螯肢动物为外群，进行系统关系分析，结果显示：原尾纲、弹尾纲、双尾纲分别为单系群，原尾纲和双尾纲优先聚为一支，然后和弹尾纲构成姐妹群，以上三类又和昆虫聚为一支，支持六足动物的单系性，支持泛甲壳动物，但甲壳动物并未形成单系，其各类群和六足动物之间的亲缘关系尚须进一步确定。3。

According to practical situation of the currency MIS development and application, by anatomizing the structure of relation database, this paper puts forward a reconstruction model based on application layer data mode to realize the logistic independency between application program and database.

根据国内通用MIS系统开发和应用的实际情况，在深入剖析关系数据库结构的基础上，提出一种基于应用层数据模式的关系数据库重构模型，实现了应用程序和底层数据库的逻辑独立。

A method of inputting data into a computer system without a regular or predictable time relationship.

异步输入不按固定的时间关系向计算机系统输入数据的一种数据输入方式。

There are many influences for relation's uncertainty in spatial reasoning, and the three most important influences are the data uncertainty and acquiring difficulty of relation information and result uncertainty of spatial reasoning.

空间推理问题的不确定性的主要原因是数据的不确定性、关系提取的困难性和推理过程的不确定性，这三种不确定性因素都影响到了地理空间推理中的地图目标空间关系发掘和提取，同时，计算的复杂性也是影响地理空间推理系统应用的一个重要因素。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。