暑期国际化课程是适应高等教育国际化要求的一种创新性教学形式,旨在整合教育资源,以提升本科人才培养质量为目标,实现与国际教学资源的对接和交流、拓展本科生的国际视野,感受不同的教育文化和教学模式。以东北大学暑期国际化课程“Int...暑期国际化课程是适应高等教育国际化要求的一种创新性教学形式,旨在整合教育资源,以提升本科人才培养质量为目标,实现与国际教学资源的对接和交流、拓展本科生的国际视野,感受不同的教育文化和教学模式。以东北大学暑期国际化课程“Introduction to Mineral Processing”为例,以点带面,对暑期国际化课程的时间设置、内容设置、培养目标、考核方式、课程收费情况进行介绍,并与国外几所一流大学的暑期课程进行对比分析。对如何整合学校特色、提高暑期国际化课程的教学质量,充分发挥其在人才培养中的作用,提出几点启示。展开更多
Flotation behavior and adsorption mechanism of octyl hydroxamic acid(OHA)on wolframite were investigated through flotation experiments,adsorption tests,zeta-potential measurements,infrared spectroscopy and solution ch...Flotation behavior and adsorption mechanism of octyl hydroxamic acid(OHA)on wolframite were investigated through flotation experiments,adsorption tests,zeta-potential measurements,infrared spectroscopy and solution chemistry calculations.Results of flotation and adsorption experiments show that the maximum values of flotation recovery and adsorption capacity occur around p H 9.In term of the solution chemistry calculations,the concentration of metal hydroxamate is greater than that of metal tungstate and metal hydroxyl,and metal hydroxamate compounds are identified to be the main species on wolframite surface at p H region of 8-10,contributing to the increase of OHA adsorption and flotation performance.Results of zeta-potential and IR spectra demonstrate that OHA adsorbs onto wolframite surface by chemisorptions.Hydroxamate ions can bond with Mn_2+/Fe_2+cations of wolframite surface,forming metal hydroxamate compounds,which is a key factor in inducing the hydrophobicity of wolframite under the conditions of maximum flotation.展开更多
文摘暑期国际化课程是适应高等教育国际化要求的一种创新性教学形式,旨在整合教育资源,以提升本科人才培养质量为目标,实现与国际教学资源的对接和交流、拓展本科生的国际视野,感受不同的教育文化和教学模式。以东北大学暑期国际化课程“Introduction to Mineral Processing”为例,以点带面,对暑期国际化课程的时间设置、内容设置、培养目标、考核方式、课程收费情况进行介绍,并与国外几所一流大学的暑期课程进行对比分析。对如何整合学校特色、提高暑期国际化课程的教学质量,充分发挥其在人才培养中的作用,提出几点启示。
基金Project(2014CB643402) supported by the National Basic Research Program of ChinaProject(CX2013B082) supported by the Hunan Provincial Innovation Foundation for Postgraduate,China
文摘Flotation behavior and adsorption mechanism of octyl hydroxamic acid(OHA)on wolframite were investigated through flotation experiments,adsorption tests,zeta-potential measurements,infrared spectroscopy and solution chemistry calculations.Results of flotation and adsorption experiments show that the maximum values of flotation recovery and adsorption capacity occur around p H 9.In term of the solution chemistry calculations,the concentration of metal hydroxamate is greater than that of metal tungstate and metal hydroxyl,and metal hydroxamate compounds are identified to be the main species on wolframite surface at p H region of 8-10,contributing to the increase of OHA adsorption and flotation performance.Results of zeta-potential and IR spectra demonstrate that OHA adsorbs onto wolframite surface by chemisorptions.Hydroxamate ions can bond with Mn_2+/Fe_2+cations of wolframite surface,forming metal hydroxamate compounds,which is a key factor in inducing the hydrophobicity of wolframite under the conditions of maximum flotation.