试题库管理信息系统

本文叙述了大工试题库管理信息系统(DUTTQBMIS)在Foxpro2.5B for Windows3.X和Window95平台上的总体设计思想及一些具体处理方法。该系统实现了题库编辑、考题选择、考题调整、考题打印及系统管理等功能,具有随机性强、成卷速度快、调整余地大、打印样式多、操作灵活方便等特点,可广泛应用于教学工作中。     

Combinatorial model involving mixed deterministic freight volume distribution and user’s equilibrium assignment

Considering characteristics of Chinese urban mixed traffic, the author develops a combinatorial model involving the mixed deterministic traffic volume distribution and user’s equilibrium (UE) assignment on the basis of symmetrical link travel time function (or deterrence). Its uniqueness and equivalance to the Wardropian principle of UE are also proved. Finally, we give the algorithm of model. Project supported by the Youth Scientific Foundation of Shanghai Municipal Commission of Education (97QG18)     

优化上海研究生学位论文 随机抽检系统的探析

上海市研究生教育多年来坚持以学位论文作为质量监控主要抓手,开展博士、硕士学位 论文答辩前的随机抽检与“双盲”评议工作,不断促进研究生培养质量的提高。同时随机抽检结果也 用做检验高校质量保障体系运行和作用分析的依据。本文主要介绍项目的优化历程、理念演进,分 析项目的创新机制与成效,进而达到总结和推广的作用。     

用Excel 2000实现"考场临时抽签"

本文结合Excel宏命令、随机函数以及排序等功能,介绍了一种“考场临时抽签”的计算机实现方法.     

基于创新价值的农业科技项目立项评价指标体系构建及实证研究

通过文献研究、案例分析与专家访谈,初步提出农业科技项目的创新性评价指标后基于调查问卷的大样本数据,选用验证性因子分析对指标进行删减与分类,得到9个一级指标及35个二级指标,这是在农业领域首次以科技项目创新价值为核心的立项评价指标。而后在主观层次分析法与客观熵值法基础上,运用层次-熵值组合赋权方法得到指标权重。该方法与较为常见的偏差最大化组合赋权法所得的权重数值具有较高的相关度,而定量评价结果与实际同行评议结果具有较高的相似度。     

我国省域知识产权发展空间关联及其影响因素研究

探究省域知识产权发展空间关联及其影响因素对国家实现创新发展具有重要的指导意义,本文利用修正的引力模型确定我国省域知识产权发展空间关联网络结构,基于社会网络分析(SNA)和二次指派程序(QAP)对该网络进行特征刻画和影响因素分析.研究表明:省域知识产权发展关联紧密,呈现明显的核心-边缘特征;空间近临关系、科技服务水平和人...     

外语自主学习模式中词汇随机性测试系统的开发与应用

文章探索了用微软office工具Excel实现外语词汇随机性测试的方法,提出的词汇随机测试模型包括测试词语抽取随机性和受试学生选择随机性两个维度。提出的周期性随机测试模型遵循人类大脑记忆原则,符合大脑的记忆遗忘规律,可以用作外语自主学习模式中学生形成性评价的一个重要工具。     

基于游程统计和Walsh谱能量分布的调色板图像隐写分析

提出一种基于游程统计和Walsh谱能量分布的调色板图像隐写分析方法,利用调色板颜色的奇偶值(parity value,P值)构造P值图像,通过游程统计和Walsh变换提取出46维特征,并用校准技术削弱载体图像差异对分析统计量的干扰.实验表明,该方法适用于EzStego、分量和以及最佳奇偶隐写等调色板图像隐写算法,比奇异颜色分析准确.     

Clones identification of Sequoia sempervirens (D.Don) Endl.in Chile by using PCR-RAPDs technique

A protocol of polymerase chain reaction-random amplified polymorphic DNAs (PCR-RAPDs) was established to analyse the gene diversity and genotype identification for clones of Sequoia sempervirens (D.Don) Endl.in Chile.Ten (out of 34) clones from introduction trial located in Voipir-Viilarrica,Chile,were studied.The PCR-RAPDs technique and a modified hexadecyltrimethylammonium bromide (CTAB) protocol were used for genomic DNA extraction.The PCR tests were carried out employing 10-mer random primers.The amplification products were detected by electrophoresis in agarose gels.Forty nine polymorphic bands were obtained with the selected primers (BG04,BF07,BF 12,BF13,and BF 14) and were ordered according to their molecular size.The genetic similarity between samples was calculated by the Jaccard index and a dendrogram was constructed using a cluster analysis of unweighted pair group method using arithmetic averages (UPGMA).Of the primers tested,5 (out of 60) RAPD primers were selected for their reproducibility and high polymorphism.A total of 49 polymorphic RAPD bands were detected out of 252 bands.The genetic similarity analysis demonstrates an extensive genetic variability between the tested clones and the dendrogram depicts the genetic relationships among the clones,suggesting a geographic relationship.The results indicate that the RAPD markers permitted the identification of the assayed clones,although they are derived from the same geographic origin.     

Clones identification of Sequoia sempervirens (D. Don) Endl. in Chile by using PCR-RAPDs technique

A protocol of polymerase chain reaction-random amplified polymorphic DNAs (PCR-RAPDs) was established to analyse the gene diversity and genotype identification for clones of Sequoia sempervirens (D. Don) Endl. in Chile. Ten (out of 34) clones from introduction trial located in Voipir-Villarrica, Chile, were studied. The PCR-RAPDs technique and a modified hexadecyltrimethylammonium bromide (CTAB) protocol were used for genomic DNA extraction. The PCR tests were carried out employing 10-mer random primers. The amplification products were detected by electrophoresis in agarose gels. Forty nine polymorphic bands were obtained with the selected primers (BG04, BF07, BF12, BF13, and BF14) and were ordered according to their molecular size. The genetic similarity between samples was calculated by the Jaccard index and a dendrogram was constructed using a cluster analysis of unweighted pair group method using arithmetic averages (UPGMA). Of the primers tested, 5 (out of 60) RAPD primers were selected for their reproducibility and high polymorphism. A total of 49 polymorphic RAPD bands were detected out of 252 bands. The genetic similarity analysis demonstrates an extensive genetic variability between the tested clones and the dendrogram depicts the genetic relationships among the clones, suggesting a geographic relationship. The results indicate that the RAPD markers permitted the identification of the assayed clones, although they are derived from the same geographic origin. Project (No. CONICYT-FONDEF PROYECT D01 I 1008) supported by the National Commission of Science and Research of Chile