转化思想在解数学题中的应用

通过精选一些实例进行分析和探讨，从七个方面说明转化思想在解数学题中的应用，为搞好解题教学提供帮助。     

《大学语文》教学中比较法的运用

在《大学语文》教学中引进比较法,通过对古今中外作品不同体裁、题材、表现形式、风格流派乃至不同学科的比较,可以丰富学生的知识面,活跃学生的思维,提高学生的审美情趣。     

教师批评艺术刍议

批评是学校教育最常用的方法之一,但这一方法如使用不当则收不到好的效果。教师在批评学生时应讲究批评的艺术,要慎用批评,善用批评,巧用批评。     

浅谈中学科学课程中的活动内涵

中学科学课程中重学科课程轻活动课程的现象严重,致使科学课程成为死记硬背的代名词。深入理解科学课程中的活动内涵,加强并活跃学生的实践性活动,是科学教育的必经之路。     

“一顶淘气鬼的帽子”——析当代艺术的愉悦性特点及负面影响

愉悦作为一种情感在艺术的殿堂是颇受人们欢迎的 ,也引起了不少人的关注。对当代艺术的愉悦性进行分析并讨论当代艺术愉悦的特点和它的影响。全文共分两个部分 :一 :愉悦性的特点 ;二 :愉悦性的负面影响     

CIDE gene expression in adipose tissue,liver, and skeletal muscle from obese and lean pigs

The expression of the cell death-inducing DNA fragmentation factor α-like effector (CIDE) family including Cidea, Cideb, and Cidec was significantly increased in mouse and human models of obesity. However, there was less information on these genes’ expression in pigs. Here, we hypothesized that different fat accumulation between lean (Duroc×Landrace×Yorkshire gilts, DLY) and obese (Lantang) pigs was attributed to porcine CIDE-modulating lipid metabolism. Our data showed that Cidea and Cidec were expressed at a high level in adipose tissue, and at a relatively high level in skeletal muscle, whereas Cideb was mainly expressed in the liver in both breeds of pig. Lantang pigs had higher white adipose and skeletal muscle Cidea and Cidec mRNA abundance, and hepatic and muscle Cideb mRNA than DLY pigs. Lipid metabolism-related genes including sterol regulatory element binding protein 1c (SREBP-1c), hepatocyte nuclear factor-4α (HNF-4α), peroxisome proliferator-activated receptor γ coactivator-1α (PGC-1α), fatty acid synthase (FASN), diacylglycerol O-acyltransferase 1 (DGAT1), and DGAT2 showed a higher expression level in adipose tissue from obese pigs than in that from lean pigs. Lantang pigs exhibited higher mRNA abundance for liver SREBP-1c, HNF-4α, and PGC-1α, and higher skeletal muscle SREBP-1c, HNF-4α, PGC-1α, and DGAT2 expression, as compared with DLY pigs. However, the perlipin2 mRNA levels in adipose tissues, liver, and skeletal muscle were significantly lower in obese pigs than in their lean counterparts. Furthermore, plasma non-esterified fatty acid (NEFA), glucose, and triacylglycerol (TAG) levels were greater in obese pigs than in lean pigs. Finally, data from correlation analysis further found that CIDE mRNA expression was positively correlated with back fat thickness (BFT), abdominal fat mass (AFM), and the levels of NEFA, TAG, and glucose in the two breeds. Collectively, these data revealed that the porcine CIDEs possibly modulated lipid metabolism and contributed to the development of fat deposition and obesity in Lantang pigs.     

基于Internet的高校教学档案信息管理系统的设计及实现

利用计算机网络技术实现对高校教学档案的科学管理,对于促进高校档案管理现代化、信息网络化,资源共享具有重要的实践意义。文章介绍了基于Internet的高校教学档案信息管理系统(简称EAMIS)的体系结构和功能,阐述了开发EAMIS的主要技术和工具,并示范了EAMIS的一个“报表查询”模块的实现。     

对数控技术应用专业职业能力的调查研究

数控人才的严重短缺已成为制造业普遍关注的问题。加快数控技术应用型人才的培养已成为高等职业教育的重要任务之一。构建“五双”为特征的人才培养模式，是实现职业教育人才培养目标的重要途径和手段．能够最大限度满足用人单位的需求。     

C-erbB-2基因蛋白在三种癌瘤组织中表达的分析

目的 :为探讨C -erbB - 2蛋白在胃癌、大肠癌和乳腺癌中表达的异同和意义。方法 :取胃癌 114例、大肠癌 10 4例和乳腺癌 10 6例 ,石蜡切片 ,SP免疫组织化学染色。结果 :C-erbB - 2在胃癌、大肠癌和乳腺癌中的阳性率分别为 71.9%、5 7.7%和 5 4 .7%。C -erbB - 2在胃癌和大肠癌中的表达与患者年龄有关 ;C -erbB - 2表达与大肠癌分化程度及乳癌恶性程度有关。结论 :C -erbB - 2高表达是大肠癌、乳癌恶性度高 ,预后不良的指标     

全光纤无源耦合器件制作过程中的实践创新能力培养

结合本科生毕业设计“全光纤光功率比耦合器件的制备”的实践过程,在理论上基于光波的耦合波方程,对熔融拉锥单模光纤耦合器的功率耦合比与拉伸长度、拉伸位置和损耗的关系进行数值模拟,使本科生在毕业设计的有限时间内掌握一种基本软件工具。通过设计过程中的实践活动,学生在指导教师的科研理念引导下,利用实验室现有的设备制作出2×2型、单窗口1×2型1550 nm和1310 nm宽带耦合器, 并完成了对制备出的光纤耦合器的光功率和光谱的检测。在实践教学过程中,突出体现了知识、能力、科研素质提高和创新能力的培养。通过无源耦合器件的制备,培养了学生的实践动手能力和科研思维能力, 为今后的学习或就业奠定了良好的基础。