离子交换法提取D-对羟基苯甘氨酸

研究了离子交换树脂提取D-对羟基苯甘氨酸的方法,包括树脂的筛选,吸附条件和洗脱条件的确定.     

基于大规模实验的低压脱扣器电压暂降脱扣特性研究

结合国标GB/T17626.11—2008和国内外相关研究成果,设计了低压脱扣器电压暂降脱扣特性的实验方案,搭建了相应的实验平台,对当前市场上主流的10种型号低压脱扣器进行大规模实验,测试了低压脱扣器在不同电压暂降幅值、持续时间、相位等特征量组合作用下的脱扣特性,发现电压暂降幅值、持续时间及相位共同决定低压脱扣器的电压暂降脱扣特性.通过对实验结果进行极值化处理,采用曲线拟合方法,分别从相位、幅值维度上形成幅值与持续时间、相位与持续时间之间的函数关系,建立了低压脱扣器的电压暂降脱扣特性模型.     

DCS中的数据库分配

本文应用软件工程的思想,在分布式计算机系统中,对已有配置的计算机集,提出一种数据库分配方法,给出此问题在一定约束条件下的数学模型并介绍一个解此问题的启发式算法,使系统的可冗余数据库存贮的通信费用达到最小。     

Efficient Static Compaction of Test Patterns Using Partial Maximum Satisfiability

Static compaction methods aim at finding unnecessary test patterns to reduce the size of the test set as a post-process of test generation.Techniques based on partial maximum satisfiability are often used to track many hard problems in various domains,including artificial intelligence,computational biology,data mining,and machine learning.We observe that part of the test patterns generated by the commercial Automatic Test Pattern Generation(ATPG) tool is redundant,and the relationship between test patterns and faults,as a significant information,can effectively induce the test patterns reduction process.Considering a test pattern can detect one or more faults,we map the problem of static test compaction to a partial maximum satisfiability problem.Experiments on ISCAS89,ISCAS85,and ITC99 benchmarks show that this approach can reduce the initial test set size generated by TetraMAX18 while maintaining fault coverage.     

态射的Moore—Penrose逆的构成

给了了有满分解的态射的Ｍｏｏｒｅ－Ｐｅｎｒｏｓｅ逆的结构，并且一般态射给出由它的（１，３）逆和（１，４）逆表的Ｍｏｏｒｅ－Ｐｅｎｒｏｓｅ逆。     

Genetic study on the behavior of honeybees influenced by polyandry system

Within a honeybee population, due to polyandry, there are supersister and halfsister relations, thus many subfamilies exist. For the Chinese honeybee (Apis cerana cerana F.) a phylogenetic dendrogram has been constructed in which 4 subfamilies are clustered based on DNA fingerprint patterns. And it has been observed that each kind of workers is distributed to several dierent sub-families.     

粘土耐火度公式的理论根源探究

对粘土耐火度公式的理论根源和存在的问题进行了探讨，认为Ｋ２Ｏ－Ａｌ２Ｏ３－ＳｉＯ２三元相是推导此粘土耐火度公式的理论依据。虽然用它来计算粘土耐火度既简单又方便，但是由于粘土中各种氧化物杂质对其耐火度影响程度的不同，导致其计算结果与真实值之间存在一定的误差，往往呈偏高趋势。     

组合电路内部故障及多故障测试

给出了用一阶布尔差分法的扩展来求组合电路内部单故障测试集的方法；同时也讨论了如何用高阶布尔差分法来求组合电路的多故障测试集，进而给出了求组合电路双重故障测试集的４个公式，并结合具体电路阐述求解相应的故障测试集的过程     

房地产信贷风险分析

房地产是一项周期长、数量大的高投入经营活动,而我国的房地产金融体系是以银行为主导.政府宏观调控的滞后效应和房地产市场的大幅度明显波动,商业银行巨额房地产开发贷款系统风险和个人贷款风险不断聚积,对于商业银行资产质量的影响日渐显现.     

金川河水BOD5与CODCr的关系

同步测定了金川河上不同河段河水的CODCr(x)与BOD5(y),通过回归分析,发现这两种数值之间存在着线性关系,即:y=0.668x-11.1