This paper describes the fabrication and electrical characteristics of Ti/4H-SiC Schottky barrier diodes （SBDs）. The ideality factor n = 1.08 and effective Schottky barrier heightφ= 1.05eV of the SBDs were measured...This paper describes the fabrication and electrical characteristics of Ti/4H-SiC Schottky barrier diodes （SBDs）. The ideality factor n = 1.08 and effective Schottky barrier heightφ= 1.05eV of the SBDs were measured with the method of forward current density-voltage （J-V）. A low reverse leakage current below 5.96 ×10^-3A/cm^2 at a bias voltage of - 1. 1kV was obtained. By using B^＋ implantation,an amorphous layer as the edge termination was formed. We used the PECVD SiO2 as the field plate dielectric. The SBDs have an on-state current density of 430A/cm^2 at a forward voltage drop of about 4V. The specific on-resistance Ro, was found to be 6. 77mΩ2 · cm^2 .展开更多
It is critical to study how different forest management practices affect forest carbon sequestration under global climate change regime. Previous researches focused on the stand-level forest carbon sequestration with ...It is critical to study how different forest management practices affect forest carbon sequestration under global climate change regime. Previous researches focused on the stand-level forest carbon sequestration with rare investigation of forest carbon stocks influ- enced by forest management practices and climate change at regional scale. In this study, a general integrative approach was used to simulate spatial and temporal variations of woody biomass and harvested biomass of forest in China during the 21st century under dif- ferent scenarios of climate and CO2 concentration changes and management tasks by coupling Integrated Terrestrial Ecosystem Carbon budget （InTEC） model with Global Forest Model （G4M）. The results showed that forest management practices have more predominant effects on forest stem stocking biomass than climate and CO2 concentration change. Meanwhile, the concurrent future changes in cli- mate and CO2 concentration will enhance the amounts of stem stocking biomass in forests of China by 12%-23% during 2001-2100 relative to that with climate change only. The task for maximizing stem stocking biomass will dramatically enhance the stem stocking biomass from 2001~100, while the task for maximum average increment will result in an increment of stem stocking biomass before 2050 then decline. The difference of woody biomass responding to forest management tasks was owing to the current age structure of forests in China. Meanwhile, the sensitivity of long-term woody biomass to management practices for different forest types （coniferous forest, mixed forest and deciduous forest） under changing climate and CO2 concentration was also analyzed. In addition, longer rotation length under future climate change and rising CO2 concentration scenario will dramatically increase the woody biomass of China during 2001~100. Therefore, our estimation indicated that taking the role of forest management in the carbon cycle into the consideration at regional or national level is very important to project the forest carbon sequestration under future climate change and rising atmospheric CO2 concentration.展开更多
The predicted increase of temperature by effect of climatic change （1.5 ℃ to 4.5 ℃）, will affect some berry components. Anthocyanins and flavonols concentration are responsible of wine color. The level of anthocya...The predicted increase of temperature by effect of climatic change （1.5 ℃ to 4.5 ℃）, will affect some berry components. Anthocyanins and flavonols concentration are responsible of wine color. The level of anthocyanin is affected by light intensity, temperature, sugars, growth regulators and vineyard management. Abscisic acid （ABA） increases the synthesis of anthocyanin in grape. The object of study was to evaluate the effect of different temperature in berries in vitro, of two cultivars combined with ABA treatments. The treatments were control （C, water） and ABA treatment （1,000 ppm） and temperature： 25, 33 and 40 ℃. In Cabemet Sauvignon, 25 and 33 ~C did not affect anthocyanin total concentration but 40 ℃ produced a 30% decrease in anthocyanin. ABA treatment increased anthocyanin vs. C at 25 and 33 ℃, mainly due to glucosylated forms. But ABA ＋ 40 ℃ showed a 44-60% decrease in all anthocyanins forms compounds. Response of Malbec to the highest temperature （40 ℃）, at the end of ripening, was different; higher temperature produced only slight decrease of total anthocyanins concentration （decrease of 7%）. Combination of temperature ＋ ABA at 20℃ and 33℃ increased anthocyanin. But ABA ＋ 40℃ decreased glucosylated and cumarylated forms of anthocyanin.展开更多
Rice ratooning refers to the production of second crop from the stubble after the harvest of main crop. Main and ratoon rice growth and development are affected by different factors. These factors include varieties se...Rice ratooning refers to the production of second crop from the stubble after the harvest of main crop. Main and ratoon rice growth and development are affected by different factors. These factors include varieties selection, water management,fertilizer management, stubble height, plant protection practices and external environmental factors such as temperature and light.In this review, we discussed the different factors affecting the yield and yield components of main and ratoon rice. Among these factors the most important and first one is varietal selection. Varieties should be selected according to the requirement of specific area and prefer varieties resistant to insects/pests and diseases. Sufficient amount of water and fertilizer should be supplied.Stubble height of 10-20 cm will resulted in high production of ratoon rice. Too low or too high temperature and light would reduce the grain yield and quality of rice. Optimal temperature is useful for higher yield. It was concluded that by keeping the management practices more efficiently, the yield of main rice as well as ratoon rice could be increased. There is a need of more studies focusing on improvement of the quality of ratoon rice.展开更多
This paper uses survey research methods to research the three factors affecting sports teaching safety and management in the colleges and universities. It proposed to increase the awareness of the safety of teachers a...This paper uses survey research methods to research the three factors affecting sports teaching safety and management in the colleges and universities. It proposed to increase the awareness of the safety of teachers and students. And it should have a rational organization of teaching. It also should increase financial input on a regular basis in the field and equipment maintenance. Specialized security agencies and establish safety management systems and contingency plans, to encourage students to participate in accident insurance, guarantee learning the sports teaching activities of the security.展开更多
The business challenges of today are managing complexity and the speed of changes with processes and systems since there are continuously new requirements from market, consumers, suppliers, employees, government etc. ...The business challenges of today are managing complexity and the speed of changes with processes and systems since there are continuously new requirements from market, consumers, suppliers, employees, government etc. For example, when product and service innovations are launched on the market, the relevant processes, policies, people, systems, and technologies should have been prepared and set up in advance. Depending on the business sector, the implementation of new processes and systems as well as their continuous improvement can be easy to very complex and of course very costly. Responding to those challenges, there are several methodologies and approaches like Continuous Improvement Process, Lean Management and Kaizen etc. On the other hand, the application of these methodologies to other industries like service and technology companies is not always successful since their conditions and requirements are different than those of manufacturing organizations. Because of these reasons, the management needs to find out （new） ways of working and to implement new solutions in order to master those challenges and problems. This is not always easy and successful. There are different types of solution options that can be applied situational in every organization. Philosophy can help essentially by asking and answering critical questions in order to provide with solution options to reduce the complexity and to increase the speed of processes. There are several proven and new governance concepts, frameworks, and tools which follow their philosophies. This paper demonstrates how those challenges can be responded and managed as well as how a philosophical approach can help primarily to provide with appropriate solutions.展开更多
In this paper, we conduct research on new university education management methods based on the combination of humanized and institutionalized. Modem university education management, system management and the organic i...In this paper, we conduct research on new university education management methods based on the combination of humanized and institutionalized. Modem university education management, system management and the organic integration of humanistic care is under the new period of development, university education management to sustainable development as the main direction of the management. System and manage all exist, man and man is the subject and purpose of system and management. The construction of system, arrangement and operation shall be at the center of the reality of human and highlight the cultural characteristics of follow the characteristic of the knowledge in the differentiation and specialization.展开更多
文摘This paper describes the fabrication and electrical characteristics of Ti/4H-SiC Schottky barrier diodes （SBDs）. The ideality factor n = 1.08 and effective Schottky barrier heightφ= 1.05eV of the SBDs were measured with the method of forward current density-voltage （J-V）. A low reverse leakage current below 5.96 ×10^-3A/cm^2 at a bias voltage of - 1. 1kV was obtained. By using B^＋ implantation,an amorphous layer as the edge termination was formed. We used the PECVD SiO2 as the field plate dielectric. The SBDs have an on-state current density of 430A/cm^2 at a forward voltage drop of about 4V. The specific on-resistance Ro, was found to be 6. 77mΩ2 · cm^2 .
基金Under the auspices of International Science and Technology Cooperation Project(No.2010DFA22480)Major State Basic Research Development Program of China(No.2010CB833503)
文摘It is critical to study how different forest management practices affect forest carbon sequestration under global climate change regime. Previous researches focused on the stand-level forest carbon sequestration with rare investigation of forest carbon stocks influ- enced by forest management practices and climate change at regional scale. In this study, a general integrative approach was used to simulate spatial and temporal variations of woody biomass and harvested biomass of forest in China during the 21st century under dif- ferent scenarios of climate and CO2 concentration changes and management tasks by coupling Integrated Terrestrial Ecosystem Carbon budget （InTEC） model with Global Forest Model （G4M）. The results showed that forest management practices have more predominant effects on forest stem stocking biomass than climate and CO2 concentration change. Meanwhile, the concurrent future changes in cli- mate and CO2 concentration will enhance the amounts of stem stocking biomass in forests of China by 12%-23% during 2001-2100 relative to that with climate change only. The task for maximizing stem stocking biomass will dramatically enhance the stem stocking biomass from 2001~100, while the task for maximum average increment will result in an increment of stem stocking biomass before 2050 then decline. The difference of woody biomass responding to forest management tasks was owing to the current age structure of forests in China. Meanwhile, the sensitivity of long-term woody biomass to management practices for different forest types （coniferous forest, mixed forest and deciduous forest） under changing climate and CO2 concentration was also analyzed. In addition, longer rotation length under future climate change and rising CO2 concentration scenario will dramatically increase the woody biomass of China during 2001~100. Therefore, our estimation indicated that taking the role of forest management in the carbon cycle into the consideration at regional or national level is very important to project the forest carbon sequestration under future climate change and rising atmospheric CO2 concentration.
文摘The predicted increase of temperature by effect of climatic change （1.5 ℃ to 4.5 ℃）, will affect some berry components. Anthocyanins and flavonols concentration are responsible of wine color. The level of anthocyanin is affected by light intensity, temperature, sugars, growth regulators and vineyard management. Abscisic acid （ABA） increases the synthesis of anthocyanin in grape. The object of study was to evaluate the effect of different temperature in berries in vitro, of two cultivars combined with ABA treatments. The treatments were control （C, water） and ABA treatment （1,000 ppm） and temperature： 25, 33 and 40 ℃. In Cabemet Sauvignon, 25 and 33 ~C did not affect anthocyanin total concentration but 40 ℃ produced a 30% decrease in anthocyanin. ABA treatment increased anthocyanin vs. C at 25 and 33 ℃, mainly due to glucosylated forms. But ABA ＋ 40 ℃ showed a 44-60% decrease in all anthocyanins forms compounds. Response of Malbec to the highest temperature （40 ℃）, at the end of ripening, was different; higher temperature produced only slight decrease of total anthocyanins concentration （decrease of 7%）. Combination of temperature ＋ ABA at 20℃ and 33℃ increased anthocyanin. But ABA ＋ 40℃ decreased glucosylated and cumarylated forms of anthocyanin.
基金Supported by the National Basic Research Program of China(2016YFD0300208)
文摘Rice ratooning refers to the production of second crop from the stubble after the harvest of main crop. Main and ratoon rice growth and development are affected by different factors. These factors include varieties selection, water management,fertilizer management, stubble height, plant protection practices and external environmental factors such as temperature and light.In this review, we discussed the different factors affecting the yield and yield components of main and ratoon rice. Among these factors the most important and first one is varietal selection. Varieties should be selected according to the requirement of specific area and prefer varieties resistant to insects/pests and diseases. Sufficient amount of water and fertilizer should be supplied.Stubble height of 10-20 cm will resulted in high production of ratoon rice. Too low or too high temperature and light would reduce the grain yield and quality of rice. Optimal temperature is useful for higher yield. It was concluded that by keeping the management practices more efficiently, the yield of main rice as well as ratoon rice could be increased. There is a need of more studies focusing on improvement of the quality of ratoon rice.
文摘This paper uses survey research methods to research the three factors affecting sports teaching safety and management in the colleges and universities. It proposed to increase the awareness of the safety of teachers and students. And it should have a rational organization of teaching. It also should increase financial input on a regular basis in the field and equipment maintenance. Specialized security agencies and establish safety management systems and contingency plans, to encourage students to participate in accident insurance, guarantee learning the sports teaching activities of the security.
文摘The business challenges of today are managing complexity and the speed of changes with processes and systems since there are continuously new requirements from market, consumers, suppliers, employees, government etc. For example, when product and service innovations are launched on the market, the relevant processes, policies, people, systems, and technologies should have been prepared and set up in advance. Depending on the business sector, the implementation of new processes and systems as well as their continuous improvement can be easy to very complex and of course very costly. Responding to those challenges, there are several methodologies and approaches like Continuous Improvement Process, Lean Management and Kaizen etc. On the other hand, the application of these methodologies to other industries like service and technology companies is not always successful since their conditions and requirements are different than those of manufacturing organizations. Because of these reasons, the management needs to find out （new） ways of working and to implement new solutions in order to master those challenges and problems. This is not always easy and successful. There are different types of solution options that can be applied situational in every organization. Philosophy can help essentially by asking and answering critical questions in order to provide with solution options to reduce the complexity and to increase the speed of processes. There are several proven and new governance concepts, frameworks, and tools which follow their philosophies. This paper demonstrates how those challenges can be responded and managed as well as how a philosophical approach can help primarily to provide with appropriate solutions.
文摘In this paper, we conduct research on new university education management methods based on the combination of humanized and institutionalized. Modem university education management, system management and the organic integration of humanistic care is under the new period of development, university education management to sustainable development as the main direction of the management. System and manage all exist, man and man is the subject and purpose of system and management. The construction of system, arrangement and operation shall be at the center of the reality of human and highlight the cultural characteristics of follow the characteristic of the knowledge in the differentiation and specialization.
