学科评估是运用不同类型的指标对高校学科建设的成果进行客观性评价,以反映该学科的现状,体现不同高校间学科发展的差异。工商学科是一门关于工商管理活动的诸多学科总结,使用国际认可的指标对工商学科进行评估能引导该学科朝着国际化...学科评估是运用不同类型的指标对高校学科建设的成果进行客观性评价,以反映该学科的现状,体现不同高校间学科发展的差异。工商学科是一门关于工商管理活动的诸多学科总结,使用国际认可的指标对工商学科进行评估能引导该学科朝着国际化的道路发展。通过检索Web of Science数据库中30所中国大学工商学科的引文信息,获取学科的h指数、w指数以及精确排名,描述目前中国工商学科的基本发展态势,分析两种指数在学科评估上的差异性,并与学位中心2012年的评估结果进行比照。最后对比20所国际一流高校工商学科的h指数和w指数,揭示中国高校在该学科与国际一流水平存在着显著差距。展开更多
Bumps in coal mines have been recognized as a major hazard for many years. These sudden and violent failures around mine openings have compromised safety, ventilation and access to mine workings.Previous studies showe...Bumps in coal mines have been recognized as a major hazard for many years. These sudden and violent failures around mine openings have compromised safety, ventilation and access to mine workings.Previous studies showed that the violence of coal specimen failure depends on both the interface friction and width-to-height（W/H） ratio of coal specimen. The mode of failure for a uniaxially loaded coal specimen or a coal pillar is a combination of both shear failure along the interface and compressive failure in the coal. The shear failure along the interface triggered the compressive failure in coal. The compressive failure of a coal specimen or a coal pillar can be controlled by changing its W/H ratio. As the W/H ratio increases, the ultimate strength increases. Hence, with a proper combination of interface friction and the W/H ratio of pillar or coal specimen, the mode of failure will change from sudden violent failure which is brittle failure to non-violent failure which is ductile failure. The main objective of this paper is to determine at what W/H ratio and interface friction the mode of failure changes from violent to non-violent. In this research, coal specimens of W/H ratio ranging from 1 to 10 were uniaxially tested under two interface frictions of 0.1 and 0.25, and the results are presented and discussed.展开更多
A method of sol-gel for preparing a W/WO3 pH electrode was presented. H+ response characteristics, such as response range, response sensitivity, response time were investigated. The effect of heat-treatment on respons...A method of sol-gel for preparing a W/WO3 pH electrode was presented. H+ response characteristics, such as response range, response sensitivity, response time were investigated. The effect of heat-treatment on response linear relation was discussed. The influences of interfered ions and solution temperatures were also taken into consideration. Many kinds of determination technology, such as TG, DSC, IR, SEM, AFM,XPS, XRD were used to characterize the film. The results show that the film appears in crack dried-mud, and the film is composed of WO3, WO3·H2O or WO3·0.33H2O; the hydrate water decreases with the increase of the heat-treatment temperature; the W+6 in the electrode film transfers to W+5 in the course of H+ response; the H+ response course is controlled by the H+ diffusion from the solution to the WO3 crystalline, which is indicated in the EIS spectra; the best heat-treatment temperature is 200℃, and at this temperature, the electrode has an H+ response sensitivity of 52mV/pH.展开更多
The weighted HP(ω) spaces on the homogeneous type spaces have been defined in [1],in this paper we shall show the equivalence of various characterizations of HP (ω) on the certain groups that are the special kind o...The weighted HP(ω) spaces on the homogeneous type spaces have been defined in [1],in this paper we shall show the equivalence of various characterizations of HP (ω) on the certain groups that are the special kind of the homogeneous type spaces.展开更多
The paper aims at proffering a solution for college English who experience a dilemma that they cannot tap their potential fully to improve the effectiveness and efficiency of writing in English. The author recommends ...The paper aims at proffering a solution for college English who experience a dilemma that they cannot tap their potential fully to improve the effectiveness and efficiency of writing in English. The author recommends model thinking which entails habitual application of models and thus formulating a kind of efficient thinking in composing and arranging the existent linguistic and disciplinary resources established in the students' mind as an approach for those students to further their English writing skills.展开更多
文摘学科评估是运用不同类型的指标对高校学科建设的成果进行客观性评价,以反映该学科的现状,体现不同高校间学科发展的差异。工商学科是一门关于工商管理活动的诸多学科总结,使用国际认可的指标对工商学科进行评估能引导该学科朝着国际化的道路发展。通过检索Web of Science数据库中30所中国大学工商学科的引文信息,获取学科的h指数、w指数以及精确排名,描述目前中国工商学科的基本发展态势,分析两种指数在学科评估上的差异性,并与学位中心2012年的评估结果进行比照。最后对比20所国际一流高校工商学科的h指数和w指数,揭示中国高校在该学科与国际一流水平存在着显著差距。
基金sponsored by Coal and Energy Research Bureau and CDC-NIOSH under Grant No.R01OH009532
文摘Bumps in coal mines have been recognized as a major hazard for many years. These sudden and violent failures around mine openings have compromised safety, ventilation and access to mine workings.Previous studies showed that the violence of coal specimen failure depends on both the interface friction and width-to-height（W/H） ratio of coal specimen. The mode of failure for a uniaxially loaded coal specimen or a coal pillar is a combination of both shear failure along the interface and compressive failure in the coal. The shear failure along the interface triggered the compressive failure in coal. The compressive failure of a coal specimen or a coal pillar can be controlled by changing its W/H ratio. As the W/H ratio increases, the ultimate strength increases. Hence, with a proper combination of interface friction and the W/H ratio of pillar or coal specimen, the mode of failure will change from sudden violent failure which is brittle failure to non-violent failure which is ductile failure. The main objective of this paper is to determine at what W/H ratio and interface friction the mode of failure changes from violent to non-violent. In this research, coal specimens of W/H ratio ranging from 1 to 10 were uniaxially tested under two interface frictions of 0.1 and 0.25, and the results are presented and discussed.
基金Project supported by the Research Foundation of Foshan University
文摘A method of sol-gel for preparing a W/WO3 pH electrode was presented. H+ response characteristics, such as response range, response sensitivity, response time were investigated. The effect of heat-treatment on response linear relation was discussed. The influences of interfered ions and solution temperatures were also taken into consideration. Many kinds of determination technology, such as TG, DSC, IR, SEM, AFM,XPS, XRD were used to characterize the film. The results show that the film appears in crack dried-mud, and the film is composed of WO3, WO3·H2O or WO3·0.33H2O; the hydrate water decreases with the increase of the heat-treatment temperature; the W+6 in the electrode film transfers to W+5 in the course of H+ response; the H+ response course is controlled by the H+ diffusion from the solution to the WO3 crystalline, which is indicated in the EIS spectra; the best heat-treatment temperature is 200℃, and at this temperature, the electrode has an H+ response sensitivity of 52mV/pH.
文摘The weighted HP(ω) spaces on the homogeneous type spaces have been defined in [1],in this paper we shall show the equivalence of various characterizations of HP (ω) on the certain groups that are the special kind of the homogeneous type spaces.
文摘The paper aims at proffering a solution for college English who experience a dilemma that they cannot tap their potential fully to improve the effectiveness and efficiency of writing in English. The author recommends model thinking which entails habitual application of models and thus formulating a kind of efficient thinking in composing and arranging the existent linguistic and disciplinary resources established in the students' mind as an approach for those students to further their English writing skills.
