实验选课系统的设计及实现

在实行学分制的情况下,配合校级中心实验室的管理模式和实验室管理软件进行设计和开发的实验选课系统,既适应了学分制的要求,完善了实验室的管理机制,也提高了管理水平和工作效率。     

Evolutionary Computation and its Application

On Mar.23,2006,a project in the Major Program of NSFC-"Evolutionary computation and its application",managed by Prof.Licheng Jiao,Prof.Lishan Kang,Prof.Zhenya He,and Prof.Tao Xie,passed its Final Qualification Process and was evaluated as Excellent.     

再辉效应对T9A钢显微组织和机械性能的影响

研究了T9A钢铅浴淬火时,再辉效应对其显微组织和机械性能的影响.在珠光体转变温度范围内等温时,随着等温温度的降低,引起塑性下降的原因是再辉效应促发颗粒状或短片状珠光体形成;在上贝氏体转变温度区,由于出现再辉效应产生的温度爬升现象,使试样温度升至屈氏体转变温度区从而形成上贝氏体和屈氏体的混合组织,使得强度增高曲线出现平台或稍有下降,且塑性发生下降,同时,还对等温淬火的定义提出了新的看法,绘出了反映实际情况的共析钢C-曲线上的组织形成图。     

浅析商务英语中的某些翻译误区及其原因

随着我国加入世界贸易组织，商务英语作为对外经济交流的工具，其作用日见重要。本文就商务英语翻译中由于语法理解错误，英语一词多义，专业知识模糊等原因所造成的翻译误区进行归纳分析。     

骨髓干细胞的可塑性及其在栓塞性疾病中的应用

栓塞性血管阻塞在急性心肌梗死、脑梗塞、血栓闭塞性脉管炎、糖尿病足等发病过程中起着重要作用。目前临床上针对这些疾病的治疗手段主要有：药物溶栓、血管旁路移植和介入手术等,多年来其治疗方法无实质性进展。上个世纪九十年代人们发现了干细胞新的生物学特性—可塑性,对干细胞可塑性的研究以及相关技术的发展为心脏病、老年痴呆、帕金森等的治疗带来了希望,也为栓塞性疾病的治疗开辟了新途径,有望成为治疗手段之一。     

A rapid and accurate 3-(4,5-dimethyl thiazol-2-yl)-2,5-diphenyl tetrazolium bromide colorimetric assay for quantification of bacteriocins with nisin as an example

The objective of this study is to propose a more accurate and faster MTT [3-(4,5-dimethyl thiazol-2-yl)-2,5-diphenyl tetrazolium bromide] colorimetric assay (MCA) for quantitative measurement of polypeptide bacteriocins in solutions with nisin as an example. After an initial incubation of nisin and indicator bacterium Micrococcus luteus NCIB 8166 in tubes, MTT was added for another incubation period. After that, nisin was quantified by estimating the number of viable bacteria based on measuring the amount of purple formazan produced by cleavage of yellow tetrazolium salt MTT. Then MCA was compared to a standard agar diffusion assay (ADA). The results suggested a high correlation coefficient (r ²=0.975±0.004) between optical density (OD) and the inhibitory effect of nisin on a bacterial strain Micrococcus luteus NCIB 8166 at a range of 0.125~32 IU/ml. The MCA described in this study was very quick. Quantification of nisin took only 7~8 h and the detection limit was at the level of 0.125 IU/ml when compared to 12 IU/ml and 24~28 h for ADA. The MCA provides an accurate and rapid method for quantification of nisin in solutions and is expected to be used for quantification of other antimicrobial substances.     

三种群捕食-食饵离散系统的持久性

研究了具有第Ⅱ类功能性反应的三种群捕食-食饵离散系统，得到了保证该系统持久性的充分条件．     

中晚期高危妊娠引产32例分析及经验总结

目的：分析中晚期妊娠合并症引产病例的特征，适当引产方式的选择。总结引产处理成功的经验。方法：总结32例中晚期妊娠合并内外科疾病选择引产病例，分析各病种分布以及引产方式、引产并发症。结果：32例病例中肝肾疾病占31％，选择利凡诺引产15例，水囊引产12例，药物引产4例。均无内外科并发症发生。结论：做好有妊娠合并症的中晚期引产的术前术中准备工作，选择合适的引产方式是引产成功安全的关键。     

非有效市场条件下证券交易税实证研究

主要分析在股市存在泡沫的情况下,证券交易税税率提高对采取正反馈投资策略的噪音交易者和理性投资的被动交易者及套利者的影响,在理论不支持征收交易税降低市场波动的宏观调节政策.     

东露天铁路专线采空区治理对策研究

针对东露天铁路专线所经过的采空区特点,分析了典型采空区上覆岩层的稳定性和上覆岩层移动形式,提出该地区采空区的治理措施。