天水农村中小学体育设施开发利用的现状调查与思考

在体育课程改革的新形势下,以甘肃省天水市21所有代表性的农村中小学体育设施资源为研究对象,采用特尔菲法、问卷调查法、文献资料法、实地考察法、访谈法、数理统计法,对当前甘肃省天水市农村中小学体育设施资源开发利用的现状进行了调查分析。指出了存在的主要问题,提出了农村中小学体育设施资源开发与利用的思路、案例、保障体系等。     

Facile and efficient one-pot synthesis of 2-arylbenzoxazoles using hydrogen tetrachloroaurate as catalyst under oxygen atmosphere

In this paper, we presented a novel method for the facile and efficient one-pot synthesis of 2-arylbenzoxazoles, which oxygen atmosphere with anhydrous tetrahydrofuran (THF) as solvent or in solvent-free condition. The results show that this method could bring excellent yields as high as 96%. THF was proven to be the best choice among several solvents screened and the reaction was tolerated with a variety of aromatic aldehydes possessing electron-donating or withdrawing groups. The advantages of the present method lie in catalytic process using economic and environmentally benign dioxygen as oxidant.     

如何提高数字图书馆设备的采购质量

本文从设备的先进性与实用性、经济性之间的关系，考虑设备的安全性、稳定性和可靠性，准备招投标文件和保证设备的质量、可维护性等方面论述了如何提高数字图书馆设备的采购质量。     

一种新的小型旋臂水池试验台

介绍了自行研制的小型旋臂水池试验台的设计思想、结构形式及其主要技术问题。该试验装置借鉴了通用大型旋臂水池技术，具有结构紧凑、转速高、耗能少、操作简单省时等特点。主要用于模型在水下受力的对比试验，也可承担其它小尺寸模型的水下试验任务。     

实践教学基地设备管理的实践与探讨

综合型工程实践教学基地的仪器设备管理是一项十分重要的工作,对提高实践教学质量和办学效益起到至关重要的作用。加强设备的科学管理,使其最大限度的发挥作用,促进各项工作的全面发展。     

Hydrogenation properties of mechanically milled Mg2Nio.8Cr0.2-CoO/Al2O3 composites

Mg2Ni0.8Cr0.2-x wt.% CoO/Al2O3 (x=0.5, 1, 2 and 3) composites were prepared by mechanically milling sintered Mg2Ni0.8Cr0.2 alloy and CoO/Al2O3 compound for 45 h. The addition of CoO/Al2O3 compound resulted in the good kinetics properties of hydriding/dehydriding reaction of the composites. The composite with 1.0 wt.% CoO/Al2O3 catalyst could reach the maximum hydrogen absorption capacity (2.9 wt.%) within 5 min at 393 K under H2 pressure of 4 MPa, and can desorb rapidly at 493 K. The decomposition and synthesis of hydrogen molecule on Mg2Ni0.8Cr0.2 alloy surface was promoted by addition of CoO/Al2O3 catalyst. In addition, the formation of metallic Ni particles, strain and defects during the ball milling process also resulted in the improved hydrogenation performance of Mg2Ni-based alloys.     

Degradation of chlorophenol by in-situ electrochemically generated oxidant

INTRODUCTION With the development of industry, more and more pollutants are discharged into environment, among them, phenolic wastes are typical contami-nants considered to be hazardous and top priority toxic pollutants listed by the USEPA. They are toxic even at low concentration. Due to their biorefractory, bioaccumulation and carcinogenic potential, the treatment of these contaminants is very important in environmental protection. Various technologies and processes have been tried …     

石家庄市公共文化建设研究

随着城市的全面改造升级,石家庄市公共文化建设正在发生显著变化。为使公共文化建设真正起到提升城市形象、提高市民素质、丰富人民文化生活的作用,还需进一步加强文化设施的规划建设,积极举办特色文化活动,开发多种文化服务功能,探索合理的经营管理方式。     

过碳酸钠的开发、生产及应用

介绍了新型精细化工产品过碳酸钠的性质、国内外生产现状、生产技术进展和应用情况.     

面向学生专业创新能力培养的交通设计课程教学改革探索

车联网、无人驾驶等交通领域的科技创新大量涌现,这在一定程度上对交通运输专业学生的专业创新能力培养提出一定的挑战,也创造了一定的机遇。文章以提升学生专业创新能力为目标,通过对学生创新情况的抽样调查和分析,以“交通工程设施设计”课程为例,从教学内容和教学方法两方面进行教学改革探索和实践,以期为新时代背景下的交通设计类课程教学改革提供参考与借鉴。