信息化条件下企业档案集成管理与集成服务

利用信息化手段开展档案资源的集成管理与集成服务是未来的一种发展趋势,也是企业数字档案馆建设必须考虑的目标.讨论了利用信息集成技术解决目前档案管理中存在的一些问题,引入数据挖掘的方法实现对企业档案信息资源的深层利用和多元化服务.     

考虑热传递时有温度反馈的缓发超临界过程分析

对输入小阶跃反应性（ρ0〈β）、有热传递和温度反馈时反应堆缓发超临界过程进行了研究。提出了一个新的物理模型,由数值计算求出任意初始功率条件下反应堆反应性、功率随时间的变化规律,并进行分析讨论,给出了一些有益的新结果。The delayed supercritical process of nuclear reactor with temperature feedback and heat transfer while inserting small step reactivity（ρ0〈β）is analyzed. A new model is proposed. For an initial power, the variations of output power and reactivity with time are obtained by numerical method. The results are analyzed and discussed. Some useful new conclusions are drawn.     

金属板材冲压装备自动化技术现状与发展趋势

文章从压力机、自动化送料系统和机器人搬运系统3个方面阐述了冲压装备自动化技术现状,并预测了其发展趋势,在未来几年,单机联线自动化冲压线仍然是中国汽车业的发展主力,用于大型覆盖件冲压的多工位压力机可能会在中外合资汽车公司率先应用.     

推广增长曲线模型中回归系数阵的最小二乘估计

对于推广的增长曲线模型Y=∑i=1^2AiBiCi Ξ，其中Bi(i=1，2)为未知系数阵，本文利用投影阵和递归算法给出了回归系数阵B1，B2的最小二乘估计的具体表达式。     

试析高校教学管理重心不能有效下移的原因

分析了高校教学管理重心下移的必要性,并指出了当前我国高校教学管理重心不能有效下移的五个方面的重要原因：计划经济体制的惯性继续影响着高校教学管理模式的改革;高等教育质量的监控机制与教学管理重心下移存在着一定的矛盾;高校内部管理制度不健全不完善,使放权没有制度依据和保证;高校教学资源条件不充分,使教学管理重心下移缺乏物质基础;作为应然权力主体的院系意识不强,能力发挥不够。     

浅谈如何提高《植物保护学》教学效果

怎样培养学生学习积极性，提高教学效果？这是每一位教师不断努力研究的课题，笔者通过多年的《植物保护学》教学实践，认为在教学上应“删繁就简，重点突出，联系实际，启发思维，多种形式，生动直观；强化实习，面向社会”。     

Optimal time for mesenchymal stem cell transplantation in rats with myocardial infarction

Background： Bone marrow mesenchymal stem cell （MSC） transplantation is a promising strategy in the treatment of myocardial infarction （MI）. However, the time for transplanting cells remains controversial. The aim of this study was to find an optimal time point for cell transplantation. Methods： MSCs were isolated and cultured from Sprague-Dawley （SD） rats. MI model was set up in SD rats by permanent ligation of left anterior descending coronary artery. MSCs were directly injected into the infarct border zone at 1 h, 1 week and 2 weeks after MI, respectively. Sham-operated and MI control groups received equal volume of phosphate buffered saline （PBS）. At 4 weeks after MI, cardiac function was assessed by echocardiography; vessel density was analyzed on hematoxylin-eosin stained slides by light microscopy; the apoptosis of cardiomyocytes was evaluated by terminal deoxynucleotidyl transferase-mediated dUTP nick end-labeling （TUNEL） assay; the expressions of proteins were analyzed by Western blot. Results： MSC transplantation improved cardiac function, reduced the apoptosis of cardiomyocytes and increased vessel density. These benefits were more obvious in 1-week group than in 1-h and 2-week groups. There are more obvious increases in the ratio of bcl-2/bax and the expression of vascular endothelial growth factor （VEGF） and more obvious decreases in the expression of cleaved-caspase-3 in 1-week group than those in other two groups. Conclusion： MSC transplantation was beneficial for the recovery of cardiac function. MSC transplantation at 1 week post-MI exerted the best effects on increases of cardiac function, anti-apoptosis and angiogenesis.     

基于现场总线技术的烧结过程远程监控

烧结控制是过程较为复杂的冶金工业过程。由于控制对象的复杂性，对监控技术也提出了更高的要求。提出的基于现场总线的远程监控可以实现检测点配置、输入参数设置、信息分析处理、故障诊断与报警显示、数据管理与统计报表输出等多项功能。实践表明：该方案能较好地实现控制过程的资源共享、协同工作和集中管理。     

Studies on the Catalytic Activities of Cyclopalladated Ferrocenylimine in the Suzuki Reaction of Pyridylboronic Acid Derivative with Arylhalides

Heterobiaryls have important biologicalproperties. [1] The use of catalytic cross-coupling methodologies forpreparing aryl functionalized heterocycles with pharmaceutical, agrochemical, materials, and supermolecular appli-cations is a burgeoning field of study. [2]     

约瑟夫问题的几种算法

给出了约瑟夫问题的4种求解算法.