废锡焊料回收工艺研究

对采用碳粉还原锡铅氧化物回收焊锡渣(粗炼)、硫粉造渣除铜粗锡精炼的温度作了理论上的推导,采用正交实验法对粗炼和精炼的工艺条件进行优选。在此基础上作了生产性实验,得到了满意的效果,该方法已用于实际生产。     

The energy and mass balance of Los Angeles County

We conducted an urban “metabolic” study of inputs and outputs of food, water, energy, and pollutants from Los Angeles County, USA. This region has been the subject of recent debate about the nature of population density and distribution as it relates to urban form and associated environmental impacts. We found that with the exception of food imports and wastewater outputs, inputs of resources and outputs of pollutants generally declined on a per capita basis from 1990 to 2000. Reductions likely reflected a combination of changes in public policy, improvements in technology and public infrastructure, and impacts of increases in population density. However, in comparison to other municipalities and urban regions, resource consumption per capita was still relatively high in some categories, particularly inputs of water and transportation energy. Per capita greenhouse gas emissions were lower in Los Angeles County than for the average of the USA as a whole but higher than previous analyses of urban areas internationally, largely due to comparatively high emissions from the transportation sector. Wastewater discharge accounted for less than 40% of water inputs excluding precipitation; however the partitioning of water outputs through other potential losses, specifically evapotranspiration, runoff, and groundwater recharge, remains highly uncertain. We suggest that more detailed information about water losses will greatly improve future mass and energy accounting for analyses of urban environmental sustainability in this semi-arid region.     

掘港保卫战与苏中抗日根据地的开辟

黄桥决战后 ,新四军遵照中央指示战略挺进江、海地区。新四军正确处理敌、顽、我之间的关系 ,在策略上赢得了主动。在与敌人的对决中 ,新四军运用积极的防御战术 ,以少胜多 ,取得了平原地区防守战役的重大胜利。这场战役 ,在苏中抗日根据地的建立及整个抗日战争史上具有重要的军事地位。     

浅谈云南现代彝学研究中的多元路径与本土化问题

彝学研究的厚实基础及多元化特点为我们分析讨论当前背景下的中国学术研究的多元化与本土化问题提供了极为有价值的案例，本文尝试以云南彝学为例，在云南彝学发展变迁的历史背景下，分析研究彝学研究的多元路径与本土化问题。     

Alcohol use among college students: responses to raising the purchase age

On December 1, 1985, New York State raised its alcohol purchase age from 19 to 21. We used a quasi-experimental research design to explore the changes in alcohol use behaviors and attitudes of undergraduates at a large central New York university before and after this legislation was enacted. The overwhelming majority of this undergraduate population is under 21 years old and is thus affected by the new legislation. A comparison of data from the two survey times revealed that 90% of the undergraduates sampled continued to drink at least occasionally. Our analysis of drinking quantity showed a slight moderation in alcohol consumption overall, with the greatest changes occurring for the heaviest drinkers--men and members of Greek organizations. Even with apparent moderation in student drinking, reported negative consequences such as physical injuries were more common. A change in drinking location to less-controlled environments, such as private rooms and unmonitored parties, is offered as one possible explanation.     

浅析高师音乐教育专业钢琴课教学内容与课程体系的拓展

本文以现代教育理念及现代教育技术为基本依据,结合高师音乐教育专业新的培养目标,构建新的钢琴课教学内容与课程体系,改变过去单一的教学模式,拓展学生的钢琴相关知识,建立一个充分发挥教师和学生的主观能动性,增进学生学习乐趣,对提高钢琴教学质量起到重要作用。     

单片机控制车床的程序设计方法

介绍用MCS-51单片微机控制车床的系统程序设计方法。程序包括:车床控制面板监控程序、数控源程序编辑程序、数控编译程序和车床加工控制程序等。文中也对单片机控制车床的硬件原理作一简单的介绍。     

两个野生金针菇菌株栽培试验

试验采用野生菌株F．97、F．DT和常规菌株F．12进行以棉籽壳、木屑、玉米芯为主料的3个配方的对比试验。结果表明：F．97、F．DT的子实体产量和品质与对照无显著差异；但不同配方间的产量差异显著，商业栽培金针菇不宜大量添加杂木屑或玉米芯。     

顾客认知对品牌心理所有权的影响研究——基于品牌价值观一致性的中介作用

随着社会化媒体的快速发展,顾客选择日趋多样化,提升顾客品牌心理所有权成为理论和实践共同关注的重要课题。虽然学术界关于品牌心理所有权的概念和维度仍存在些许分歧,但品牌心理所有权对品牌及企业的重要性已得到广泛认可。基于社会心理学原理,以虚拟社区为载体实证分析顾客认知因素、品牌价值观一致性、品牌心理所有权三者之间的内在关系,有助于企业深入了解顾客对品牌心理所有权的影响因素,为企业制定正确的营销战略提供理论与实践指导。