新形势下大学物理实验教学改革的几点思考

围绕学院新的"2+2"人才培养模式,分析了当前大学物理实验课程现状以及存在问题,结合近些年来自己在教学过程中实践和体会,提出了大学物理实验改革的思路和措施,对大学物理实验教学改革有一定的指导意义。     

浅析王建民的《第二二胡狂想曲》及对教学的影响

王建民是近年来在我国民族器乐尤其是在二胡曲创作方面卓有成绩的一位现代作曲家,他的"中西并存、雅俗并用"的创作理念为我们创作了四首优秀的二胡狂想曲,本文将从曲式结构、风格特点、技术技巧等方面阐述其《第二二胡狂想曲》的艺术特色及对教学的影响。     

珠光体含量对铁素体-珠光体钢CO_2腐蚀的影响

为了研究组织对钢二氧化碳腐蚀的影响,采用不同珠光体含量的铁素体-珠光体钢进行了高压CO2腐蚀实验,并通过定量金像分析研究了珠光体含量同钢的腐蚀形貌和腐蚀速率之间的关系。实验结果表明,由于珠光体含量不同,不同的钢在相同的条件下产生局部腐蚀的温度范围相差很大。珠光体含量越高,局部腐蚀程度越低;钢中珠光体含量在82%以上时,不发生局部腐蚀。在CO2腐蚀过程中,铁素体-珠光体钢中的珠光体作为阴极、铁素体相作为阳极发生电偶腐蚀。珠光体含量越高,阳极腐蚀电偶电流密度越大。在55℃时,随着钢中珠光体含量的增加,腐蚀速率增加。     

B2C电子商务中消费者信任的影响因素研究

信任是一种很复杂的社会与心理现象。近年电子商务交易问题日益突出,消费者信任的缺失已经成为制约我国电子商务进一步发展的关键因素。B2C电子商务中研究消费者信任影响因素可以从消费者个人、在线商家、网站和电子商务环境4个角度展开。探讨消费者信任的影响因素对于我国电子商务行业持续、健康、快速地发展有着重要的促进作用。     

中高职3+2模式有效衔接的问题思考

文中在分析了中高职3+2衔接模式的特点的基础上,根据杭州市部分高职院校及其合作院校的调研情况,对目前中高职3+2衔接模式实施过程中存在的主要问题进行了汇总分析,并提出相关建议,供中高职院校参考。     

光催化电化学联合降解水中苯酚的研究

采用电化学、光催化联合工艺降解水中苯酚,在对其降解机理、反应动力学进行分析的基础上,考察了电解质浓度、电流密度及溶液pH等控制因素对降解速率的影响。实验结果表明：电化学和光催化同时作用时,产生了协同作用;以氯化钠为电解质可增强协同作用;光电联合工艺降解苯酚符合准一级反应动力学;弱酸性环境有利于降解反应的进行。在电流密度30 mA/cm2、NaCl添加量0.3 g/L、pH为6左右的条件下降解初始浓度50 mg/L苯酚废水,2.5 h苯酚被完全去除,6 h后TOC去除率达到75%。     

Comparing China’s GDP statistics with coincident indicators

We use factor analysis to summarize information from various macroeconomic indicators, effectively producing coincident indicators for the Chinese economy. We compare the dynamics of the estimated factors with GDP, and compare our factors with other published indicators for the Chinese economy. The estimated factors and the published coincident indicators match the GDP dynamics well and discrepancies are very short. The largest discrepancies may correspond to shocks affecting the growth process.     

微型化放入式电子测压器红外通信接口设计

文章介绍了基于单片机的红外串行通信接口的设计方案。该系统主要由TI公司的MSP430系列单片机和SHARP公司的GP2W0116YPS芯片构成。文章介绍了红外通信技术、器件选择和系统硬件设计,并结合软件设计说明了系统要实现的功能,最后通过VB设计的软件验证了该设计方案的可行性。实验结果表明,该系统控制方便,工作稳定,在微型化、低功耗的前提下能实现可靠的非接触式实时数据传输,在工程实践中具有重大的应用价值。     

Sex and environmental policy in the U.S. House of Representatives

Using LCV score data, we find that female legislators favor stricter environmental policies than do their male counterparts. Moreover, gender-corrected estimates suggest that voters do not push environmental policy towards the middle, but rather select the ideologically closest candidate.     

The effect of armed conflict on accumulation of schooling: Results from Tajikistan

This paper uses differences in regional and temporal exposure to the 1992-1998 armed conflict in Tajikistan to study the effect of violent conflict on schooling outcomes. Data on the past damage to a household's residences from the 1999 Tajik Living Standards Survey is used as well as data on the events during the conflict within a conceptual framework that controls for important individual, household and community characteristics. Girls who were of school age during the conflict and lived in affected regions were less likely to complete their mandatory schooling than girls of the same age who lived in the regions relatively unaffected by conflict. The results also indicate that exposure to violent conflict had a large and statistically significant negative effect on the enrollment of girls. No effect of regional and household conflict exposure on education of boys was found. The results are robust to community and household fixed effects, selection into violence and migration.