基于企业环境的ORACLE数据库性能优化

以企业环境ORACLE数据库性能优化为例,通过实际生产环境中的调优案例,分析阐述ORACLE数据库性能优化在企业资源规划（ERP）和生产中的重要地位和作用．     

Chlorella vulgaris triggers apoptosis in hepatocarcinogenesis-induced rats

Chlorella vulgaris (CV) has been reported to have antioxidant and anticancer properties. We evaluated the effect of CV on apoptotic regulator protein expression in liver cancer-induced rats. Male Wistar rats (200-250 g) were divided into eight groups: control group (normal diet), CDE group (choline deficient diet supplemented with ethionine in drinking water to induce hepatocarcinogenesis), CV groups with three different doses of CV (50, 150, and 300 mg/kg body weight), and CDE groups treated with different doses of CV (50, 150, and 300 mg/kg body weight). Rats were sacrificed at various weeks and liver tissues were embedded in paraffin blocks for immunohistochemistry studies. CV, at increasing doses, decreased the expression of anti-apoptotic protein, Bcl-2, but increased the expression of pro-apoptotic protein, caspase 8, in CDE rats, which was correlated with decreased hepatoctyes proliferation and increased apoptosis as determined by bromodeoxy-uridine (BrdU) labeling and terminal deoxynucleotidyl transferase mediated dUTP nick-end labeling (TUNEL) assay, respectively. Our study shows that CV has definite chemopreventive effect by inducing apoptosis via decreasing the expression of Bcl-2 and increasing the expression of caspase 8 in hepatocarcinogenesis-induced rats.     

一类复数阶解析函数的性质

对于一类由Salagean微分算子定义的复数阶解析函数,给出其充分条件。利用数学归纳法及正实部函数族Herglotz定理的推论,给出该类函数的系数估计不等式,研究并得到当参数取任意复数时其Fekete-Szego不等式。     

TEM8成绩分析及其对英语教学的启示

本研究以浙江省某重点大学英语专业"一本"和"三本"学生2003年TEM8的成绩为数据,在比较分析两组学生成绩的频数、极差、中位敖和均值、各单项技能之间以及各单项技能与总成绩之间的相关性的基础上,指出了该校英语专业教学中可能存在的问题,并针对这些问题提出了若干教学建议.     

8-羟基喹啉与鲱鱼精DNA作用方式的光谱法研究

在pH=7.40的Tris-HCl缓冲溶液中,采用荧光光谱法和粘度法研究了8-羟基喹啉（HQ）与鲱鱼精DNA的作用方式.用摩尔比法确定了HQ与DNA的结合比为12∶1.通过热力学研究得出,在27℃时HQ与DNA之间相互作用的Kφ27℃=3.844×105L/mol,热力学函数ΔrHφm=-5.08×104J/mol,ΔrGφm 300.15K=-3.2×104J/mol,ΔrSφm=-62.6 J/（mol.K）.结果显示该反应为焓驱动.实验表明HQ与DNA的作用方式为部分嵌插与静电作用方式.     

微直流电机恒速控制实验系统

设计的直流电机恒速控制实验系统用STM32F103C8T6单片机作为主控制芯片,采用光电耦合使控制系统与电机系统互不干扰,用PWM(脉宽调制)控制电机转速,并用测速电机测量实时转速并反馈给控制器,通过PID计算得出保持转速不变的PWM占空比,实现闭环控制,系统还预留大量接口和可扩展单元以方便学生创新设计。实验证明,该系统硬件设计可靠,能保证在不同环境下电机稳定地实现恒速运转。     

运用话语标记语提高听力理解能力——基于英语专业八级考试小讲座题型的实证研究

话语标记语在语言交际中起着重要作用。在听力理解中,听者可以运用话语标记语来引导自己更好地理解所听内容,话语标记语在帮助理解英语专业八级考试听力部分的讲座题型中具有重要作用。实证研究结果表明：用去除了话语标记语的讲座作练习的实验组所能理解的内容明显少于用带话语标记语的讲座作练习的对照组。     

新世纪PC技术发展综述

IT技术发展日新月异,计算机基础教学应与时俱进,将最新发展动态融入课堂教学中,本文简要回顾总结了近年来发展较为成熟的PC新技术。     

论创新人才培养

创新人才培养既有社会发展和人自身发展的必然性,又有时代和民族要求的紧迫性。创新教育是培养富有创新精神和创新能力的高素质人才的必由之路,因此,教育改革要以围绕创新人才培养而展开。     

Do students expect compensation for wage risk?

We use a unique data set about the wage distribution that Swiss students expect for themselves ex ante, deriving parametric and non-parametric measures to capture expected wage risk. These wage risk measures are unfettered by heterogeneity which handicapped the use of actual market wage dispersion as risk measure in earlier studies. Students in our sample anticipate that the market provides compensation for risk, as has been established with risk augmented Mincer earnings equations estimated on market data: higher wage risk for educational groups is associated with higher mean wages. With observations on risk as expected by students we find compensation at similar elasticities as observed in market data. The results are robust to different specifications and estimation models.