Despite a wealth of literature on the different facets of the EIA,and copious theoretical knowledge and practical experience,the general agreement is eluding definitions of EIA effectiveness,quality,and good practices...Despite a wealth of literature on the different facets of the EIA,and copious theoretical knowledge and practical experience,the general agreement is eluding definitions of EIA effectiveness,quality,and good practices.There are apprehensions about EIA meeting its basic objectives while project proponents continue to treat EIA as an impediment to development.Governments tend to adopt a“practical”approach,sacrificing pillars of EIA and overlooking the prime objective of environmental protection.Based on an extensive literature study and the author’s long EIA-related experience,some key workable practices for the EIA process are elaborated.Meticulous scoping using different sets of lenses,spotlighting significant impacts to determine the breadth and depth of EIA reports for focussed EIAs,robust EIA review and decision-making,commitment from the regulators for environmental protection,and use of strategic planning,strategic environmental assessment,and tiering practices are expected to address scholars’apprehensions and project proponents’concerns.展开更多
In recent years,with the global climate change,the frequency and duration of high temperature in summer and autumn have increased,causing high temperature heat damage to summer crops such as rice and maize.From the en...In recent years,with the global climate change,the frequency and duration of high temperature in summer and autumn have increased,causing high temperature heat damage to summer crops such as rice and maize.From the end of July to early August is the main period of high temperature occurrence,during which the daily average temperature above 30℃is a high probability event,and even the highest temperature is above 38℃,while this period coincides with the booting-blooming-filling stage of the single-season middle rice in Jianghuai,especially the middle-season indica rice,so it often leads to the degradation of rice spikelets,pollen abortion,difficulty in pollen dispersion,and even difficulty in heading,resulting in a serious decline in the seed setting rate and poor filling of grains,which finally affect the yield and quality.Based on the goal of high-yielding high-quality rice cultivation,this paper proposed targeted technical measures for single-season middle rice from the aspects of planting time sequence optimization,selection of high-temperature-resistant varieties,population construction,fertilizer and water management technology,and how to compensate for the occurrence of unexpected disasters to promote plant growth.This study provides technical support for high-yielding high-quality stress-resistant and disaster-reducing rice cultivation technology.展开更多
The effective operation of school-enterprise cooperation is of great strategic significance to promote college students to achieve employment of high-quality.Therefore,this paper will make a detailed discussion on the...The effective operation of school-enterprise cooperation is of great strategic significance to promote college students to achieve employment of high-quality.Therefore,this paper will make a detailed discussion on the effect that school-enterprise cooperation accelerates college students to achieve employment in good quality,hoping that it can provide the necessary guidance information to the researchers in this field.展开更多
In this work,a confined-doped fiber with the core/inner-cladding diameter of 40/250μm and a relative doping ratio of 0.75 is fabricated through a modified chemical vapor deposition method combined with the chelate ga...In this work,a confined-doped fiber with the core/inner-cladding diameter of 40/250μm and a relative doping ratio of 0.75 is fabricated through a modified chemical vapor deposition method combined with the chelate gas deposition technique,and subsequently applied in a tandem-pumped fiber amplifier for high-power operation and transverse mode instability(TMI)mitigation.Notably,the impacts of the seed laser power and mode purity are preliminarily investigated through comparative experiments.It is found that the TMI threshold could be significantly affected by the seed laser mode purity.The possible mechanism behind this phenomenon is proposed and revealed through comprehensive comparative experiments and theoretical analysis.Finally,a maximum output power of 7.49 kW is obtained with the beam quality factor of approximately 1.83,which is the highest output power ever reported in a forward tandem-pumped confined-doped fiber amplifier.This work could provide a good reference and practical solution to improve the TMI threshold and realize high-power high-brightness fiber lasers.展开更多
文摘Despite a wealth of literature on the different facets of the EIA,and copious theoretical knowledge and practical experience,the general agreement is eluding definitions of EIA effectiveness,quality,and good practices.There are apprehensions about EIA meeting its basic objectives while project proponents continue to treat EIA as an impediment to development.Governments tend to adopt a“practical”approach,sacrificing pillars of EIA and overlooking the prime objective of environmental protection.Based on an extensive literature study and the author’s long EIA-related experience,some key workable practices for the EIA process are elaborated.Meticulous scoping using different sets of lenses,spotlighting significant impacts to determine the breadth and depth of EIA reports for focussed EIAs,robust EIA review and decision-making,commitment from the regulators for environmental protection,and use of strategic planning,strategic environmental assessment,and tiering practices are expected to address scholars’apprehensions and project proponents’concerns.
基金Supported by Anhui Provincial Science and Technology Major Project(2021d06050002)Anhui Provincial Agricultural Improved Variety Project(Jiebangguashuai).
文摘In recent years,with the global climate change,the frequency and duration of high temperature in summer and autumn have increased,causing high temperature heat damage to summer crops such as rice and maize.From the end of July to early August is the main period of high temperature occurrence,during which the daily average temperature above 30℃is a high probability event,and even the highest temperature is above 38℃,while this period coincides with the booting-blooming-filling stage of the single-season middle rice in Jianghuai,especially the middle-season indica rice,so it often leads to the degradation of rice spikelets,pollen abortion,difficulty in pollen dispersion,and even difficulty in heading,resulting in a serious decline in the seed setting rate and poor filling of grains,which finally affect the yield and quality.Based on the goal of high-yielding high-quality rice cultivation,this paper proposed targeted technical measures for single-season middle rice from the aspects of planting time sequence optimization,selection of high-temperature-resistant varieties,population construction,fertilizer and water management technology,and how to compensate for the occurrence of unexpected disasters to promote plant growth.This study provides technical support for high-yielding high-quality stress-resistant and disaster-reducing rice cultivation technology.
文摘The effective operation of school-enterprise cooperation is of great strategic significance to promote college students to achieve employment of high-quality.Therefore,this paper will make a detailed discussion on the effect that school-enterprise cooperation accelerates college students to achieve employment in good quality,hoping that it can provide the necessary guidance information to the researchers in this field.
基金supported by the National Natural Science Foundation of China(62035015)the Innovative Research Groups of Hunan Province(2019JJ10005)the Hunan Provincial Innovation Construct Project(2019RS3018).
文摘In this work,a confined-doped fiber with the core/inner-cladding diameter of 40/250μm and a relative doping ratio of 0.75 is fabricated through a modified chemical vapor deposition method combined with the chelate gas deposition technique,and subsequently applied in a tandem-pumped fiber amplifier for high-power operation and transverse mode instability(TMI)mitigation.Notably,the impacts of the seed laser power and mode purity are preliminarily investigated through comparative experiments.It is found that the TMI threshold could be significantly affected by the seed laser mode purity.The possible mechanism behind this phenomenon is proposed and revealed through comprehensive comparative experiments and theoretical analysis.Finally,a maximum output power of 7.49 kW is obtained with the beam quality factor of approximately 1.83,which is the highest output power ever reported in a forward tandem-pumped confined-doped fiber amplifier.This work could provide a good reference and practical solution to improve the TMI threshold and realize high-power high-brightness fiber lasers.