A long-term field experiment on organic material application and crop rotation with green manure crops has been conducted since 1976 at Lopburi Agricultural Research and Development Center,Department of Agriculture,Lo...A long-term field experiment on organic material application and crop rotation with green manure crops has been conducted since 1976 at Lopburi Agricultural Research and Development Center,Department of Agriculture,Lop Buri Province,Thailand,to clarify the effect of organic materials and green manure crop on soil organic carbon changes.The stock change factors that stand for the relative change of soil organic carbon on the carbon stock in a reference condition(native vegetation that is not degraded or improved).Stock change factor for input of organic matter(F1),representing different levels of C input to soil such as organic material application,crop residue treatment and green manure crop cultivation,was computed with the present field experimental results.While the computed F1 of"High input with manure"was within the range of IPCC default F1 value,some of the computed F1 of"High input without manure"was much higher than the IPCC default though it was varied due to the biomass production and nutrient contents of the green manure crops planted as the second crops after corn.Therefore,the F1 computed by field experimental results can contribute to more accurate estimation of SOC changes in farm land especially in Southeast Asia because the default F1 mostly depends on the experimental data in temperate zones.Moreover,the field experiment has focused the effect of reduced tillage practices on SOC changes and corn yield since 2011.The results of the experiment will be used to compute Stock change factor for management regime(FMC)which represents the effects of tillage operations.展开更多
The research achievements of solidification theories and technologies in the last decades are reviewed with the stresses on some new development in the recent years. Some new interesting areas emerged in the last year...The research achievements of solidification theories and technologies in the last decades are reviewed with the stresses on some new development in the recent years. Some new interesting areas emerged in the last years are also pointed out.展开更多
Due to the outbreak of |x-19,colleges and universities have actively responded to the call of the state to carry out online teaching in completing their teaching tasks.After the epidemic,the online and offline hybrid ...Due to the outbreak of |x-19,colleges and universities have actively responded to the call of the state to carry out online teaching in completing their teaching tasks.After the epidemic,the online and offline hybrid teaching has become a novel mode of teaching which meets the requirements of teaching reform and the information society.This teaching method integrates both the online and offline teaching which plays an important role in enhancing teaching qualities and learning experiences.However,due to the lack of experience,there are some issues occurring in the teaching process of this method.The Luminescent Materials and Applications course is used as the subject in this article.The difficulties in traditional offline teaching as well as the advantages,detailed course construction process,and effectiveness evaluation of hybrid teaching are summarized and meticulously analyzed.In regard to that,the application of the online and offline hybrid teaching in the Luminescent Materials and Applications course is beneficial to the learning of professional knowledge and the cultivation of students'scientific literacy.Therefore,it is an effective way to improve and enrich this course by using the online and offline hybrid teaching method.展开更多
In classical Chinese gardens,the waterscape has its own unique style of expression,which is to highlight the simulation of the natural water landscape and its combination with the elements of the garden.As a pole of c...In classical Chinese gardens,the waterscape has its own unique style of expression,which is to highlight the simulation of the natural water landscape and its combination with the elements of the garden.As a pole of classical garden theory,waterscape plays an important role in organizing space and creating the overall landscape effect.In addition to the landscape concept and water management method,the combination of engineering practices and landscape aesthetics involved guarantees Artistic presentation of water bodies in gardens.Based on the existing research,this study cut in from the perspective of engineering technology,and conducted detailed research on engineering techniques,materials application and artistic expression under different water body functions and forms,and explored the fusion of "making" "technique" and "art" in the waterscape construction.展开更多
The fact that InN has a direct bandgap of 0.75eV enables InN-based nitrides devices to cover the wavelength range from UV region to 1.8μm, therefore, emerging as a new material system for optical communication applic...The fact that InN has a direct bandgap of 0.75eV enables InN-based nitrides devices to cover the wavelength range from UV region to 1.8μm, therefore, emerging as a new material system for optical communication applications.展开更多
Electronic systems that can cover large areas on flexible/stretchable substrateshave received increasing attention in the past several years because they enable new classes of applications that lie outside those easil...Electronic systems that can cover large areas on flexible/stretchable substrateshave received increasing attention in the past several years because they enable new classes of applications that lie outside those easily addressed with wafer-based microelectronics.Some attractive examples include flexible displays,flexible solar cells,electronic textiles,sensory skins,detectors,active antennas,etc.The field expends very fast and great developments have been展开更多
The mechanic affection on the blast holewalls is simply analyzed and cracking propaga-tion caused by shaped charge is explained inthis paper. In the rock materials cutting, pri-
文摘A long-term field experiment on organic material application and crop rotation with green manure crops has been conducted since 1976 at Lopburi Agricultural Research and Development Center,Department of Agriculture,Lop Buri Province,Thailand,to clarify the effect of organic materials and green manure crop on soil organic carbon changes.The stock change factors that stand for the relative change of soil organic carbon on the carbon stock in a reference condition(native vegetation that is not degraded or improved).Stock change factor for input of organic matter(F1),representing different levels of C input to soil such as organic material application,crop residue treatment and green manure crop cultivation,was computed with the present field experimental results.While the computed F1 of"High input with manure"was within the range of IPCC default F1 value,some of the computed F1 of"High input without manure"was much higher than the IPCC default though it was varied due to the biomass production and nutrient contents of the green manure crops planted as the second crops after corn.Therefore,the F1 computed by field experimental results can contribute to more accurate estimation of SOC changes in farm land especially in Southeast Asia because the default F1 mostly depends on the experimental data in temperate zones.Moreover,the field experiment has focused the effect of reduced tillage practices on SOC changes and corn yield since 2011.The results of the experiment will be used to compute Stock change factor for management regime(FMC)which represents the effects of tillage operations.
文摘The research achievements of solidification theories and technologies in the last decades are reviewed with the stresses on some new development in the recent years. Some new interesting areas emerged in the last years are also pointed out.
基金supported by the 2019-2021 Undergraduate Teaching Project of Chengdu University of Information Technology(BKJX2020022,BKJX2020081)Department of Human Resources and Social Security of Sichuan Province(2019Z226).
文摘Due to the outbreak of |x-19,colleges and universities have actively responded to the call of the state to carry out online teaching in completing their teaching tasks.After the epidemic,the online and offline hybrid teaching has become a novel mode of teaching which meets the requirements of teaching reform and the information society.This teaching method integrates both the online and offline teaching which plays an important role in enhancing teaching qualities and learning experiences.However,due to the lack of experience,there are some issues occurring in the teaching process of this method.The Luminescent Materials and Applications course is used as the subject in this article.The difficulties in traditional offline teaching as well as the advantages,detailed course construction process,and effectiveness evaluation of hybrid teaching are summarized and meticulously analyzed.In regard to that,the application of the online and offline hybrid teaching in the Luminescent Materials and Applications course is beneficial to the learning of professional knowledge and the cultivation of students'scientific literacy.Therefore,it is an effective way to improve and enrich this course by using the online and offline hybrid teaching method.
基金Youth Fund Project of the National Natural Science Foundation of China(51808005)General Social Science Project of Beijing Municipal Education Commission(SM201910009008)Youth Yuyou Talent Training Plan of North China University of Technology(NCUT2020).
文摘In classical Chinese gardens,the waterscape has its own unique style of expression,which is to highlight the simulation of the natural water landscape and its combination with the elements of the garden.As a pole of classical garden theory,waterscape plays an important role in organizing space and creating the overall landscape effect.In addition to the landscape concept and water management method,the combination of engineering practices and landscape aesthetics involved guarantees Artistic presentation of water bodies in gardens.Based on the existing research,this study cut in from the perspective of engineering technology,and conducted detailed research on engineering techniques,materials application and artistic expression under different water body functions and forms,and explored the fusion of "making" "technique" and "art" in the waterscape construction.
文摘The fact that InN has a direct bandgap of 0.75eV enables InN-based nitrides devices to cover the wavelength range from UV region to 1.8μm, therefore, emerging as a new material system for optical communication applications.
文摘Electronic systems that can cover large areas on flexible/stretchable substrateshave received increasing attention in the past several years because they enable new classes of applications that lie outside those easily addressed with wafer-based microelectronics.Some attractive examples include flexible displays,flexible solar cells,electronic textiles,sensory skins,detectors,active antennas,etc.The field expends very fast and great developments have been
文摘The mechanic affection on the blast holewalls is simply analyzed and cracking propaga-tion caused by shaped charge is explained inthis paper. In the rock materials cutting, pri-
