如何处理Oracle数据库中的坏块问题

从坏块的定义、对数据库的影响谈起,分析其产生的原因,针对不同情况提出处理方法,并总结部分如何预先发现坏块的措施,对实际工作中问题的解决是很实用的。     

论我国社会转型过程中的教育制度推进

教育制度化是教育实践活动和教育关系的规范化 ;显性教育制度是正式的 ,通过明确的、公开的规范来规约人们的教育行为 ;而隐性教育制度表现为相反的利益倾向 ,这种双重教育制度有其形成的原因、矛盾 ,从而造成普遍性教育秩序的困境与障碍     

口外翼下颌阻滞麻醉的应用解剖学研究

在40侧头预部正中矢状切开标本和60侧下颌骨标本上,按口外翼下颌阻滞麻醉的设计要求,解剖观察了下牙槽神经、舌神经在翼下颌间隙的位置。测量了从下颌管下缘点和下颌角行口外翼下颌阻滞麻醉时的进针深度和角度。测得从下颌骨下缘点的进针深度为37mm;下颌角点的深度为30mm,穿刺针与下颌支后缘之间的角度为31°。对采用该法行口外阻滞麻醉的解剖学要点,优缺点进行了讨论。     

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.     

"伊甸园"的毁灭——评托马斯·品钦的《熵》

《熵》是美国后现代主义代表作家托马斯.品钦最成熟的一部短篇小说。在这部小说中,品钦首次运用热力学第二定律即熵定律来隐喻日益混乱的后现代社会。本文着眼于作品和《圣经》典故的相似点,将小说主人公之一卡里斯托修建的温室视为“伊甸园,”通过分析这个貌似和谐完美的乐园的毁灭,揭示出交流和沟通是抵御熵化的唯一办法,人们惟有增进相互间的交流和理解,才能抵御日益恶化的混乱状态,建立真正美好和谐的“伊甸园”。     

中学英语单词与大学英语单词互相衔接的调查与研究

文章通过对中学生英语词汇学习的调查,了解中学生学习词汇的情况,并针对大学生英语词汇学习的现状,提出了中学英语单词与大学英语单词互相衔接的重要性以及做好衔接工作的一些建议。     

RL电路零输入响应的研究

本文通过实验 ,比较全面和系统的研究了RL电路零输入时的自感现象。不仅研究了时间常数、电流比对自感现象的影响 ,而且还特别研究了灯泡的灯丝温度在闪光亮度上的变化 ,从而得出一些有价值的实验结论     

电视教材文字稿本的语言特点与写作基本要求

电视教材文字稿本的创作要注意画面的运用,尽量用镜头语言来反映教学内容;解说词的写作要注意声画结合,做到通俗易懂,具体准确,形象生动,精练概括;开头要言简意赅、引人入胜,结尾要深化主题、耐人寻味.     

从输入与输出角度看大学英语口语教学

针对目前大学英语口语教学中存在的一些问题,从输入和输出角度进行分析,提出口语教学应在强调输入的基础上,充分利用课堂教学创造良好的输出环境来帮助学生提高英语口语水平.其中对输入和输出的方式进行了比较详细的探讨.     

城镇土地生态景观类型划分的指标体系研究

根据景观生态学的基本原理,采用AHP方法,系统研究了城镇土地生态景观(包括城区和城乡交错带)类型划分的指标体系问题,建立了基于FOXPRO和MAPGIS平台的城镇土地生态景观类型划分指标体系数据库。