镁基储氢合金材料的性能及研究进展

由于资源丰富,储氢容量较高,价格低廉,应用前景广阔等特点,镁基储氢合金材料成为近年来研究的热点,然而其稳定的热力学性和缓慢的动力学性限制了它的应用,因而对镁基储氢合金材料的改性日益成为了镁基储氢合金发展的重要方向,文章对镁基储氢合金材料的性能及改性方法进行了综述,并对其发展趋势进行了展望。     

Retooling Education: Testing and the Liberal Arts

The motivation and methodology for measuring intelligence have changed repeatedly in the modern history of large-scale student testing. Test makers have always sought to identify raw aptitude for cultivation, but they have never figured out how to promote excellence while preserving equality. They’ve settled for egalitarianism, which gives rise to “culturally fair” tests that substitute vagaries for knowledge, deprive students of any real appreciation for language, and trivialize education. Robert Jackson yearns for traditional oratorical approaches to schooling that venerate and imitate essential, time-tested masters. Unfortunately, he writes, such an education defies measurement with today’s multiple-choice instruments.

浅论歌唱的呼吸及其训练方法

呼吸训练是声乐教学的基础,在歌唱中掌握好科学的呼吸状态和精准的呼吸技巧是十分必要的。因此,在歌唱时必须掌握好生理机能的训练和强化,掌握正确科学的训练方法,通过长期而艰苦的呼吸与发声训练获得优美动听的歌声。     

技能大赛背景下职业教育课程改革探究——基于江苏省化学检验技能大赛

普通教育有高考,职业教育有大赛,对于职业教育的学生来说,技能水平相当重要。笔者通过剖析江苏省化学检验技能大赛的发展趋势,结合教学实践,探索在职业学校发挥技能大赛的作用,促进职业教育教学改革,努力构建德育渗透其中、融入企业文化、学生社团组织、人人参与竞争的竞赛模式。     

旅游业最优运输方案中单位运价的灵敏度分析

通过对旅游业最优运输方案中非基变量的检验数的分析,分别对非基变量和基变量对应的单位运价的灵敏度进行了讨论,得到为使最优方案不变时单位运价的变化范围。从而在单位运价随气候、道路、燃油等因素发生变化时给旅游企业决策者提供指导意见。     

心理测验在研究生教育中的价值探索

通过综述与研究生心理状况有关的研究,分析了研究生目前的心理状况,发现研究生的心理健康状况不太乐观。由此,进一步归纳心理测验在研究生群体中的应用现状及弊端。最后,重新思考了心理测验在研究生培养中的作用,建设性地提出4点建议。     

Personal Review： Sources of sulfide in waste streams and current biotechnologies for its removal

Sulfide-containing waste streams are generated by a number of industries. It is emitted into the environment as dis- solved sulfide (S2- and HS-) in wastewaters and as H2S in waste gases. Due to its corrosive nature, biological hydrogen sulfide removal processes are being investigated to overcome the chemical and disposal costs associated with existing chemically based removal processes. The nitrogen and sulfur metabolism interacts at various levels of the wastewater treatment process. Hence, the sulfur cycle offers possibilities to integrate nitrogen removal in the treatment process, which needs to be further optimized by appropriate design of the reactor configuration, optimization of performance parameters, retention of biomass and optimization of biomass growth. The present paper reviews the biotechnological advances to remove sulfides from various environments.     

初学蛙泳四步教学法

组织初学者学习蛙泳时, 首先安排熟悉水性练习, 使学生消除怕水心理, 同时学会呼吸、浮体、站立及浮体滑行等技巧; 在此基础上, 学习蛙泳腿技术和蛙泳臂与呼吸配合技术, 二者虽有前后之分, 但初步学习蛙泳腿技术后, 及时学习蛙泳臂与呼吸配合技术, 二者几乎同步进行; 最后学习蛙泳完整配合技术。     

试论考研信息资源的开发和利用

随着我国高校考研人数的逐渐增加,考研信息的需求也不断扩大.高校图书馆加强考研信息资源的开发和利用成为一种迫切需要,图书馆应该不断开发现有馆藏资源、电子资源和人力资源,不断丰富考研文献信息资源,开展多方位、多途径的个性化的专题考研信息服务工作,从而逐步提高图书馆的整体服务水平.