“准备就绪公立学校”(YES Prep Public Schools)是美国得克萨斯州休斯敦地区的特许公立学校系统,旨在将贫穷薄弱地区的学生送入大学之门,并让他们顺利完成大学学业,最终成为各行各业的领导者。该校在学业标准、课程设置、考试评价、支...“准备就绪公立学校”(YES Prep Public Schools)是美国得克萨斯州休斯敦地区的特许公立学校系统,旨在将贫穷薄弱地区的学生送入大学之门,并让他们顺利完成大学学业,最终成为各行各业的领导者。该校在学业标准、课程设置、考试评价、支持渠道、支撑系统、师资培养等方面进行一系列的改革,取得了突出成效。“准备就绪公立学校”是美国新保守主义和新自由主义联袂改革的标志性产物,其未来发展走向值得关注。展开更多
Thermo-gravimetric-analysis(TGA) was used to analyze the combustion characteristics of an oil shale and semi-cokes prepared from it.The effect of prior pyrolysis and TGA heating rate on the combustion process was stud...Thermo-gravimetric-analysis(TGA) was used to analyze the combustion characteristics of an oil shale and semi-cokes prepared from it.The effect of prior pyrolysis and TGA heating rate on the combustion process was studied.Prior pyrolysis affects the initial temperature of mass loss and the ignition temperature.The ignition temperature increases as the volatile content of the sample decreases.TG/DTG curves obtained at different heating rates show that heating rate has little effect on ignition temperature.But the peak of combustion shifts to higher temperatures as the heating rate is increased.The Coats-Redfern integration method was employed to find the combustion-reaction kinetic parameters for the burning of oil shale and oil shale semi-coke.展开更多
The speed with which the information technology has evolved is unparallel to any other technological evolution man has ever witnessed. From hospitals to classrooms, technology seems to have taken over people＇s lives....The speed with which the information technology has evolved is unparallel to any other technological evolution man has ever witnessed. From hospitals to classrooms, technology seems to have taken over people＇s lives. Where there have been studies to see the impact of technology in varying aspects of life, there seem to be little or no studies on the actual rate of increase in usage of e-technologies among university students and why they have become so popular. This paper uses a survey tool that captures responses from 900 students to study the rate of increase in student use of various e-technologies in and out of classrooms along with some viable reasons why students are acquiring and using such technologies and suggests ways to use this study to better understand student behavior in terms of e-cheating, and how to enhance teaching and learning environments for students.展开更多
Artificial upwelling, as a geoengineering tool, has received worldwide attention because it may actualize ocean fertilization in a sustainable way, which could potentially alleviate the pressures on the fish stocks an...Artificial upwelling, as a geoengineering tool, has received worldwide attention because it may actualize ocean fertilization in a sustainable way, which could potentially alleviate the pressures on the fish stocks and human-driven climate change in the ocean. We reviewed the current knowledge on the development of an artificial upwelling system and its potential environmental effects. Special attention was given to the research progress on the air-lift concept artificial upwelling by Zhejiang University. The research on artificial upwelling over the past few decades has generated a range of devices that have been successfully applied in the field for months. Based on field experiments and the associated modeling results, part of them reported positive effects on increasing primary production and enhancing CO2 sequestration. However, as a significant disturbance to the environment, especially for large-scale applications, the uncertainties related to the potential effects on ecosystem remain unsolved. Zhejiang University has overcome the technical challenges in designing and fabricating a robust and high efficiency artificial upwelling device which has been examined in two field experiments in Qiandao Lake and one sea trial in the East China Sea. It was investigated that cold and hypoxic deep ocean water(DOW) could be uplifted to the euphotic layer, which could potentially change the nutrient distribution and adjust the N/P ratio. Both simulation and field experiments results confirmed that utilizing self-powered energy to inject compressed air to uplift DOW was a valid and efficient method. Therefore, further field-based research on artificial upwelling, especially for long-term field research is required to test the scientific hypothesis.展开更多
文摘“准备就绪公立学校”(YES Prep Public Schools)是美国得克萨斯州休斯敦地区的特许公立学校系统,旨在将贫穷薄弱地区的学生送入大学之门,并让他们顺利完成大学学业,最终成为各行各业的领导者。该校在学业标准、课程设置、考试评价、支持渠道、支撑系统、师资培养等方面进行一系列的改革,取得了突出成效。“准备就绪公立学校”是美国新保守主义和新自由主义联袂改革的标志性产物,其未来发展走向值得关注。
基金Project CPEUKF08-04 support by the Key Laboratory of Coal Processing and Efficient Utilization, Ministry of Education of China
文摘Thermo-gravimetric-analysis(TGA) was used to analyze the combustion characteristics of an oil shale and semi-cokes prepared from it.The effect of prior pyrolysis and TGA heating rate on the combustion process was studied.Prior pyrolysis affects the initial temperature of mass loss and the ignition temperature.The ignition temperature increases as the volatile content of the sample decreases.TG/DTG curves obtained at different heating rates show that heating rate has little effect on ignition temperature.But the peak of combustion shifts to higher temperatures as the heating rate is increased.The Coats-Redfern integration method was employed to find the combustion-reaction kinetic parameters for the burning of oil shale and oil shale semi-coke.
文摘The speed with which the information technology has evolved is unparallel to any other technological evolution man has ever witnessed. From hospitals to classrooms, technology seems to have taken over people＇s lives. Where there have been studies to see the impact of technology in varying aspects of life, there seem to be little or no studies on the actual rate of increase in usage of e-technologies among university students and why they have become so popular. This paper uses a survey tool that captures responses from 900 students to study the rate of increase in student use of various e-technologies in and out of classrooms along with some viable reasons why students are acquiring and using such technologies and suggests ways to use this study to better understand student behavior in terms of e-cheating, and how to enhance teaching and learning environments for students.
基金financially funded by the National Natural Science Foundation of China(Grant Nos.51120195001&51205346)the Program for Zhejiang Leading Team of S&T Innovation(Grant No.2010R50036)+1 种基金the Public Welfare Project of Science Technology Department of Zhejiang ProvinceChina(Grant No.2015C31096)
文摘Artificial upwelling, as a geoengineering tool, has received worldwide attention because it may actualize ocean fertilization in a sustainable way, which could potentially alleviate the pressures on the fish stocks and human-driven climate change in the ocean. We reviewed the current knowledge on the development of an artificial upwelling system and its potential environmental effects. Special attention was given to the research progress on the air-lift concept artificial upwelling by Zhejiang University. The research on artificial upwelling over the past few decades has generated a range of devices that have been successfully applied in the field for months. Based on field experiments and the associated modeling results, part of them reported positive effects on increasing primary production and enhancing CO2 sequestration. However, as a significant disturbance to the environment, especially for large-scale applications, the uncertainties related to the potential effects on ecosystem remain unsolved. Zhejiang University has overcome the technical challenges in designing and fabricating a robust and high efficiency artificial upwelling device which has been examined in two field experiments in Qiandao Lake and one sea trial in the East China Sea. It was investigated that cold and hypoxic deep ocean water(DOW) could be uplifted to the euphotic layer, which could potentially change the nutrient distribution and adjust the N/P ratio. Both simulation and field experiments results confirmed that utilizing self-powered energy to inject compressed air to uplift DOW was a valid and efficient method. Therefore, further field-based research on artificial upwelling, especially for long-term field research is required to test the scientific hypothesis.
