一种安全的校园门户方案研究

随着校园网络发展规模的不断扩大,各部门之间的信息交流越来越频繁和复杂,如何.降低各部门之间访问的难度并且保证各部门间的数据一致性变得越来越重要.根据信息技术安全共同评价准则提出一个容易构建并具有较高安全性和可靠性的校园门户解决方案,将各部门的信息联合起来,以满足可访问性和一致性的要求.     

贵州13个柞蚕品种主要经济性状调查

用常规育种法对贵州13个柞蚕品种采用扩繁试验研究,对其产卵数、二天孵化率、普通孵化率、发育整齐度、收蚁结茧率、千粒茧重、茧层率、茧层量、幼虫统一生命率、不受精卵率、全龄经过、全茧量等主要经济形状进行比较分析,试验结果表明,柞蚕125、128品种表现的各性状指标都高于原生产用种101,固有特征、特性等各项成绩均明显优于其品种,且纯度也有较大幅度提高,建议可以利用125、128等品种进行扩繁。而133品种表现的各性状指标以及经济指标略低于101品种,该品种在必要时也可以进行扩繁。     

宁南霉素与醋酸铜混配对烟草普通花叶病的联合作用

在室内条件下,用枯斑抑制率法测定了宁南霉素、醋酸铜及其5种不同比例的混配对烟草普通花叶病毒的毒力。结果表明,宁南霉素和醋酸铜对烟草普通花叶病的EC70分别为0.9647mg/L和0.4556mg/L,两者以4:1混配具有显著的增效作用,增效系数为1.48。     

甜菜RAPD反应体系优化及亲缘关系研究

利用正交试验设计,从Mg~(2+)、dNTP、引物、Taq酶和模板5种因素5个水平上对甜菜RAPD反应体系进行优化,确立了适合甜菜RAPD反应体系:25μL反应体系中含1×Buffer、1.0 mmol/LMg~(2+)、1U Taq DNA聚合酶、0.25 mmol/LdNTP、0.4μmol/L随机引物和25 ngDNA模板。利用优化的RAPD反应体系对38个甜菜品种进行亲缘关系分析。结果表明,38个品种之间的多态性比较高,变异大。聚类图结果表明,38个甜菜品种遗传距离的变异范围在0.14～0.72。当以遗传距离0.50来划分时,可将38个品种分为两大类,以遗传距离0.40来划分时,又可以把第2大类分为6个亚类。结果显示,RAPD优化体系适合甜菜亲缘关系鉴定。     

枸杞在食品加工中的应用

枸杞营养成分非常丰富,具有多种经济性状,在食品加工中应用空间极大。介绍了以枸杞叶、枸杞果实、枸杞籽及枸杞提取物为原料的枸杞加工制品,旨在说明枸杞在食品加工中的应用前景。     

Near Crack Line Elastoplastic Solution for an Eccentric Cracks Loaded by the Pore Water Pressure

By using near crack line analysis method and Mohr-Coulomb strength criterion,the elastic-plastic solution for near crack line of an eccentric cracks loaded by the pore water pressure under large scale yielding condition is analyzed.The elastic stress fields,the plastic stress field,the unit normal vector of the elastic-plastic boundary near the crack line,the elastic-plastic stress fields near crack line are identified.The change pattern of the length of the plastic zone and the pore water pressure is presented.Besides,the elastic-plastic analytical solution for an eccentric cracks loaded by the pore water pressure is obtained.     

The influence of stress sensitivity on productionof hydraulically-fractured tight gas wells

This paper takes Sulige Gas Field as a case study and used three methods including laboratory experiments,production performance analysis and reservoir simulation to study the influence of stress sensitivity on production of fractured tight gas wells.The results show that the fracture length and conductivity of hydraulically created fracture are reduced more than 50%,and the stress sensitivity of hydraulically created fracture is stronger than that of matrix.With the increase of gas production,the influence of stress sensitivity becomes stronger,and finally results in 18% reduction of gas production,and hydraulically created fractures play an important role in the influence of stress sensitivity.     

Improvement of circulatory circle design method forautomobile hydraulic torque converters

A design method to reduce the circulatory circle axle size for automobile hydraulic torque converters is proposed. According to the beam flow theory, the variety of the axle size has little effect on the characteristics of torque converters. Based on analyzing traditional design method, it’s found that the basic reason for oversize of axle is the unreasonable semi-empirical expression of the first and third arc radius. An improved design semi-empirical expression is proposed for passage car torque converters based on the analysis of several foreign mature torque converters, and an improved design method is established. The improved method is used to design a torque converter, and the results show that the circulation circle axle size reduces about 26% in the condition of keeping the same characteristics of the traditional method. It means the improved design method can better meet the design requirement of automobile torque converters.     

南方油桃裂果规律及防治措施

针对油桃栽培中普遍存在的裂果现象,从不同油桃品种间、树冠不同部位、不同树年、不同土壤的油桃裂果发生情况,从而总结油桃裂果发生规律,进而提出防治油桃裂果的技术措施.     

基于MTK平台的智能手机的设计

一种基于MTK平台的智能手机的设计方案。MTK手机以MT6255为核心处理单元,外部扩展存储模块、射频模块和其它音频模块;首先对MT6255处理器进行了功能分析,然后对智能手机主要接口电路进行了详细设计,最后对MTK手机平台进行了软件结构分析。