基于“卓越计划”的单片机实践教学改革

本文在自动化卓越工程师新修订的培养方案的基础上,针对自动化专业的单片机实践教学,结合课题组成员多年来在科研教学中的经验,在课程的培养体系、教学方法、实践环节以及第二课堂等方面的建设中进行了探索与改革。教学实践结果表明,改革可有效提高课堂授课效率,增强学生的学习兴趣,提高学生动手实践能力。     

项目驱动的《计算机控制技术》课程实践教学的研究

《计算机控制技术》是自动化专业的一门理论性与实践性都很强的课程。加强实践环节,尤其是综合实践环节,是学生综合运用所学专业理论知识进行实际应用的设计过程。论文介绍以项目为载体,优化重置该课程的教学内容及教学方式,围绕计算机控制系统的教学实践,设计不同的实施项目,运用项目驱动教学,激发学生学习兴趣,培养学生创新意识、协作精神和理论联系实际的学风,解决高校《计算机控制技术》教学与人才培养滞后问题,切实提高学生的实践动手能力和软硬件开发能力。     

浅谈数控一体化教学

随着我国制造业自动化水平不断的提高,现代企业对数控人才需求越来越高。虽然中职数控专业教学方法不断改进,但是理论和实践还不能有效的结合。为了解决这个问题,使学生理论知识与实践更好地联系起来,提高学生学习的兴趣和积极性。笔者结合课程改革,从数控专业一体化教学方法展开讨论,探讨数控一体化可行的教学方法和教学实施。     

学前教育专业音乐教学激发学生兴趣的途径研究

兴趣是最好的老师,音乐教学必须从培养学生的学习兴趣入手。音乐是学前教育专业的重要基础课程,本文结合教学实践,总结了激发学生音乐学习兴趣的经验和方法,有利于提高音乐教学效果和人才培养质量。     

《自动控制原理》课上的生活哲理

对于电气自动化专业,《自动控制原理》作为一门重要的专业基础课,上课过程中教师面临课程难,枯燥,学生没兴趣等问题。结合教学实践,针对教学现状,文中提到了一些具体教学内容可联系到的生活哲理。     

基于计算流体力学仿真软件的实践教学应用

以计算流体力学仿真软件在《流体力学与传热学基础》课程的本科教学为例,探索实现理论与实践相结合的教学方法 ,进一步提高本科教学质量。依据流体力学与传热学的理论和实践特点,在课堂讲授中侧重于核心知识,力求结合工程实例巩固基础知识,激发学生学习该课程的兴趣。建立计算流体力学仿真软件的上机体系,注重实践教学,培养学生在工程应用中的使用软件能力。     

浅谈如何培养学生《机械制图》的学习兴趣

兴趣是最好的老师。机械制图是机电专业的一门重要的专业基础课,是后续课程的重要基础。学生的学习兴趣是学好《机械制图》课程的内在因素,因此,在该课程教学中,要多方面激发学生兴趣,灵活运用多种教学手段,以提高学生的学习兴趣。针对中职学校学生缺乏学习积极性的现状,本文提出改善教学方法、充分利用现代化教学手段、利用模型直观的展现出物体的结构特征,借以激发学生的学习兴趣、调动学生的学习主动性,从而提高教学效果。     

探讨《工程热力学》教学方法

《工程热力学》是建筑环境与能源应用专业的基础课程,理论强,公式多,定义多,如果单纯照本宣科,学生就会在学习过程中失去兴趣,对后续课程的学习也会非常不利。本文分析了该课程特点,根据已有的教学实践,谈了一些体会和具体做法,以增强学生学习效果,实现教学目标。     

动画概论课程教学改革探索与实践

动画概论课程是动漫设计专业的基础课程,是专业课程的先遣,为后续专业课程打下基础。结合动画概论课程教学的现状,对存在问题进行剖析,结合高职学生的特点,着重从教学内容、教学方法以及教学评价等方面进行探讨与实践,提出了目标导向教学法;采用分组教学方,注重培养学生的创造力;运用动画技术软件讲解抽象理论知识;设计竞赛游戏环节,活跃课堂气氛,增加学生的学习兴趣,开拓了学生的视野,激发了学生的学习热情,坚定了学生的学业目标和职业目标。     

基于PBL教学法的VB课程教学应用研究

针对Visual Basic程序设计(简称VB)传统教学中,高等院校非计算机专业学生程序设计理论知识难懂、枯燥乏味,实践动手能力差等问题,本文对PBL教学法进行了详细的介绍,并将PBL教学法应用到VB课程教学中。结合教学实际,以学生为中心,以问题为平台,激发学生的学习兴趣,提高学生自主学习、合作学习、问题解决能力以及实践创新能力。从而提高教学时效,为高校非计算机专业计算机基础教学提供了一种新的改革思路。     

商会自治的基石——商会自治规范研究

在现代法律秩序中,商会自治规范是制定法的基础和必要的补充,甚至在某些方面替代了制定法;商会自治规范主要包括商会组织规范、行为规范、惩罚规范以及争端解决规范等;其效力仅及于其内部成员;商会自治规范和制定法之间存在冲突,但也存在整合的基础。     

癸氧喹酯干混悬剂含量测定的改进

采用高效液相色谱法测定癸氧喹酯干混悬剂的含量,在2-250μg/mL范围内,峰面积的常用对数与进样量浓度的常用对数呈良好的线性关系,R^2=1(n=5),平均回收率为99.24%~99.51%,RSD在0.05%~0.28%。此方法分析时间短,样品前处理简便、定量结果准确,重现性好,结果满意,为其质量控制提供了依据。     

猪毛色遗传的研究进展

本文概述了猪的毛色类型、猪的毛色遗传模式,着重综述了猪毛色基因分子基础的研究进展,指出存在问题并就未来发展方向做了思考。     

Comparison of 2 methods of centesis of the bursa of the biceps brachii tendon of horses

REASONS FOR PERFORMING STUDY: Centesis of the bicipital bursa using an 8.9 cm long spinal needle has been reported but the alternative of employing a 3.8 cm long hypodermic needle requires validation. OBJECTIVE: To compare the efficacy of 2 different methods of centesis of the bicipital bursa and to evaluate the usefulness of ultrasonographic imaging to determine the location of solution administered when centesis of the bursa is attempted. METHODS: For Trial 1, 6 clinicians, who had no previous experience of centesis of the bicipital bursa, attempted to inject a solution composed of an aqueous radiopaque contrast medium and physiological saline solution (PSS) into the bicipital bursae of 2/12 horses using the previously described distal approach to inject one bursa and a proximal approach to inject the contralateral bursa. The bicipital tendon and bursa were examined ultrasonographically before and after injection; and both shoulders were examined radiographically to identify the location of the medium. In Trial 2, another 6 clinicians, also with no previous experience of centesis, repeated Trial 1, using 6 horses, but the radiopaque contrast medium was mixed with air instead of PSS. RESULTS: Accuracy of centesis using the proximal approach was 39% and that of the distal approach 28%. Ultrasonographic examination of the shoulder allowed the location of solution and air to be accurately predicted in all 12 shoulders examined. CONCLUSIONS: Clinicians who have had no previous experience performing centesis of the bicipital bursa are unlikely to be successful in centesis using either approach. Radiographic examination after injecting a radiopaque contrast medium may be necessary to assess the success of centesis especially if bursal fluid is not obtained during centesis. Injecting air along with the radiopaque contrast medium provides more accurate ultrasonographic confirmation of centesis and better radiographic definition than does injection without air.     

不同样本商品蜂蜜中硒含量的测定

用硝酸和高氯酸消化蜂蜜,使硒游离出来,在微酸性环境下,硒和2,3-二氨基萘(DAN)生成有较强荧光的物质,用环己烷萃取,在激发波长378nm,荧光波长518nm处测定其荧光强度。蜂蜜中硒含量范围:0.10～0.82μg/g。表明:蜂蜜应视为天然富硒营养品。     

乳酸杆菌益生作用机制的研究进展

乳酸杆菌作为益生菌广泛用于人和动物。本文综述了乳酸杆菌改善宿主健康的机制。乳酸杆菌可通过产生抗菌物质如乳酸、过氧化氢、细菌素,或者通过竞争营养或肠道黏附位点来抑制致病菌;通过诱导黏附素的分泌或阻止细胞凋亡而增强肠道的屏障功能,从而保护肠道。文章重点讨论了乳酸杆菌表面成分（表面蛋白、脂磷壁酸和肽聚糖）与肠道受体（Ｃ型凝集素受体、Ｔｏｌｌ样受体和 Ｎｏｄ样受体）,阐述了他们结合后启动免疫调节信号,调控肠道免疫功能以发挥改善健康作用的机制。     

中华人民共和国农业部公告 第267号

为贯彻落实《兽药生产质量管理规范》(简称《兽药GMP》),进一步推动兽药GMP实施进程,我部制定了《兽药生产质量管理规范检查验收办法》,现予公告。本公告自2003年6月1日起施行。附件:兽药生产质量管理规范检查验收办法二○○三年四月十日第一章 总则 第一条 为推动《兽药生产质量管理规范》(以下简称兽药GMP)的实施,规范兽药GMP检查验收工作,制定本办法。 第二条 农业部负责全国兽药GMP管理和检查验收工作;负责制修订兽药GMP检查验收管理规定;负责兽药GMP检查员队伍建设和监督管理工作,负责国际兽药贸易中GMP互认工作。 …     

鸡败血支原体垂直传播模式及其阻断方法

以国际标准强毒Ｒ株人工感染非免疫产蛋鸡,定时扑杀,分别从鼻窦、眶下孔、气管、肺、气囊、卵巢和输卵管分离ＭＧ,并收集感染鸡所产蛋分离ＭＧ。结果表明,人工感染４８小时后上、下呼吸道及肺已被全面感染,９６小时气囊已被感染,１２０小时输卵管已能分离到ＭＧ,卵巢始终分离不到ＭＧ。人工感染鸡自１４４小时便能在其所产蛋中分离出ＭＧ。药物治疗能在７２小时内消除感染,油乳剂苗则需２４天后逐渐降低蛋内ＭＧ分离率,药物卵内注射、种蛋药浴、高温处理均能杀死卵内ＭＧ,但以研制的种蛋浸泡剂药浴效果为最好。     

Effects of size of ingestively masticated fragments of plant tissues on kinetics of digestion of NDF

Ingestively masticated fragments were collected and sized via sieving. Different sizes of esophageal masticate and ruminal digesta fragments, and ground fragments of larger masticated pieces were incubated in vitro, and undigested NDF remaining at intervals of up to 168 h of incubation was determined. The ruminal age-dependent time delay (tau) for onset of digestion of NDF was positively correlated (P < 0.004) with the mean sieve aperture estimated to retain 50% of the fragments between successive sieve apertures (MRA). Degradation rate of potentially degradable NDF (PDF) and level of indigestible NDF were not related (P > 0.10) to MRA of masticated and ground fragments. Estimates of tau were positively related to MRA, with slopes of bermudagrass < corn silage < ruminal fragments of corn silage. It was concluded that fragment size-, and consequently, ruminal age-dependent onset of PDF degradation of a mixture of different fragment sizes results in an age-dependent rate of degradation of the more rapidly degrading of two subentities of PDF. Models are proposed that assume a tau before onset of simultaneous degradation of PDF from two pools characterized as having gamma-modeled age-dependency and age-constant rates. The ruminal age-dependent pool seems to be associated with the faster-degrading pool, and its rate parameter increases with range in MRA in the population of fragments. Conceptually, the ruminal age-dependent rate parameter for PDF degradation seems to represent a composite of several effects: 1) effects of the size-dependent tau; 2) range in MRA of the population of ingestively masticated fragments; and 3) subentities of PDF that degrade via more rapid age-dependent rates compared with subentities of PDF that degrade via age-constant rates. The estimated fractional rates of ruminative comminution of ingestively masticated fragments (0.060 to 0.075/h) were of a magnitude similar to the mean fractional rates of PDF digestion (0.030 to 0.085/h), which implies that ruminative comminution may be first-limiting to fractional rate of PDF digestion. The in vivo roles of ingestive and ruminative mastication of fragments on PDF degradation must be considered in any kinetic system for estimating PDF digestion in the rumen. These results and others in the literature suggest that the rate of surface area exposure rather than intrinsic chemical attributes of PDF may be first-limiting to degradation rate of PDF in vivo.