基于LLWin3.0控制Fischertechnik模型实例

随着计算机的普及，特别是软件技术的发展，基于电脑控制且充分展示个性化创新实验，成为当今高等学校素质教育的重要方式和发展方向。为此，详细介绍了德国慧鱼公司的专利产品“创意组合模型(fischertechnik)的应用实例。结合LLWin3．0图形化编程技术。为教育行业应用提供了有效的途径。     

农机培训在目前市场经济环境下的改革分析

文章主要根据现阶段市场经济条件下农村农机培训工作的发展现状,深入剖析现阶段农机培训的问题,根据农机培训的具体要求,重点分析农机培训工作的改革内容和改革方向,力图通过改进农机培训工作,加强农机培训改革力度,全面提升农业生产力,推动农村经济的发展。     

常德市经济型酒店发展的SWOT分析

经济型酒店在全国各地目前的发展是如雨后春笋般崛地而起,发展势头惊人,在大城市得到较好发展后,现在中小城市遍地开花,而因"水土不服"等各方面的因素而发展受挫,出现了一系列混乱竞争、恶性定价等现象。以及各大连锁品牌酒店的入驻,加上本地原有的中、低星级酒店及本土经济型酒店,使得经济型酒店在中小城市的竞争日趋激烈,如何能在新市场中立于不败之地,这是经济型酒店在发展过程中亟待解决的重要问题。此次研究以常德市经济型酒店发展的为例,运用SWOT方法对发展常德市经济型酒店发展的优势、劣势、机遇及威胁进行了分析,并提出常德市经济型酒店发展的对策和措施。     

Protective Effect of Sulforaphane on Reproductive Function of Male Mice with Cadmium Poisoning

The study was aimed to explore the protective effect of sulforaphane (SFN) on the reproductive function of male mice with cadmium poisoning.40 healthy clean grade male Kunming mice were randomly divided into four groups:control group (H₂O),cadmium chloride group (2.3 mg/kg CdCl₂),sulforaphane group (10 mg/kg SFN),sulforaphane + cadmium chloride group (10 mg/kg SFN+2.3 mg/kg CdCl₂),and continuous administration for 10 d,all mice were executed by dislocated cervical vertebra at 2 d after the last administration,and then the pathologic changes of testicular tissues,organ coefficient of testicle and epididymis,sperm quality and concentration of testosterone were tested.Additionally,the contents of GSH and MDA,and the activities of T-SOD in testis were also detected at the same time. Compared with the control group,pathology damages were observed in cadmium chloride group,organ coefficient of testis and epididymis,sperm quality and levels of testosterone extremely significantly decreased (P<0.01),the activities of T-SOD and GSH content were extremely significantly decreased (P<0.01),and the concentration of MDA was extremely significantly enhanced (P<0.01).Compared with the control group,the activity of T-SOD and concentration of GSH in sulforaphane group were significantly increased (P<0.05),and the concentration of MDA was not significant different between the control group and sulforaphane group (P>0.05).While compared with the cadmium chloride group,the sperm motility rate and sperm total count in sulforaphane and cadmium chloride group were extremely significantly increased (P<0.01),the organ coefficient of testicle and epididymis was increased significantly (P<0.05),the concentration of GSH and activity of T-SOD in testicular tissue were extremely significantly increased (P<0.01),and the concentration of MDA was extremely significantly decreased (P<0.01).The results indicated that sulforaphane had the protection effect on reproduction function of male mice with cadmium poisoning.     

一类二维加权积分数值求积方法及其误差分析

针对一类二维加权积分的数值计算方法及误差分析进行研究,参照一维广义高斯积分数值求积方法提出一种具有较高代数精度的计算方法并对其误差做分析,同时给出几个简明的结果。这些结果可用到诸如小波分解,图像处理与多分辨数字信号处理等领域。     

苏氨酸和异亮氨酸对皖西白鹅屠宰性能、器官指数及肠道形态结构、消化酶活性、抗氧化和免疫指标的影响

本试验旨在研究苏氨酸和异亮氨酸对皖西白鹅屠宰性能、器官指数及肠道形态结构、消化酶活性、抗氧化和免疫指标的影响。选取30日龄体重相近的皖西白鹅180只,随机分为3组,每组3个重复,每个重复20只。对照组饲喂基础饲粮,苏氨酸组在基础饲粮中添加2.0 g/kg的L-苏氨酸,异亮氨酸组在基础饲粮中添加2.5 g/kg的L-异亮氨酸。试验期60 d。结果表明：1）各组之间90日龄屠宰性能和器官指数无显著差异（P>0.05）。2）异亮氨酸组60日龄十二指肠和空肠绒毛高度、隐窝深度显著或极显著高于对照组（P<0.05或P<0.01）,苏氨酸组60日龄十二指肠、空肠和回肠隐窝深度及90日龄十二指肠和回肠绒毛高度显著或极显著高于对照组（P<0.05或P<0.01）。3）苏氨酸组和异亮氨酸组60、90日龄十二指肠胰蛋白酶活性极显著高于对照组（P<0.01）,苏氨酸组60、90日龄十二指肠麦芽糖酶活性及90日龄空肠淀粉酶、乳糖酶活性显著或极显著高于对照组（P<0.05或P<0.01）。4）异亮氨酸组60日龄空肠总抗氧化能力显著高于对照组和苏氨酸组（P<0...