In the tropical regions represented by Hainan,there are abundant solar and thermal resources,and it is relatively suitable for the construction of photovoltaic greenhouse(PVG).However,the construction of PVG still rel...In the tropical regions represented by Hainan,there are abundant solar and thermal resources,and it is relatively suitable for the construction of photovoltaic greenhouse(PVG).However,the construction of PVG still relies mainly on experience and is incapable of quantifying the balance between the photovoltaic(PV)generation and the light requirements for agricultural production.As a result,actual PVGs are primarily PV-based,without carefully considering the needs of agricultural daylighting.To quantify the influence of the design parameters of PVGs and the layout of PV panels on the internal daylighting of serrated PVGs,and to optimize the daylighting design of the roof,this paper utilizes the Design Builder software to establish gradient models for a multi-span serrated-type PVG in tropical regions.Gradient models were established in terms of aspects,namely span,width of longitudinal/transverse daylighting strip,height,roof angle,and photovoltaic panel coverage rate(PCR).Daylighting in the greenhouse of each gradient model was simulated,and with the annual average daily light integral(A_(DLI))and distribution uniformity(DU)as evaluation indicators,the influence of various design parameters on the daylighting inside the greenhouse was quantified.The result reveals that:(1)PCR is the decisive indicator for daylighting in the PVG,and a function between PCR and the A_(DLI) is derived as A_(DLI)=-15.5 PCR+16.841;(2)Increasing the width of longitudinal daylighting strip significantly improves the A_(DLI) and enhances DU while increasing the span has a noticeable effect on improving A_(DLI) but does not significantly enhance DU;(3)Increasing the eave height without changing PCR does not enhance A_(DLI) but effectively improves DU;increasing the transverse daylighting strip and adjusting the roof angle hardly improves A_(DLI).In summary,it is recommended that the optimal span for PVGs in tropical regions be set within the range of 6.5-8.0m,and the eave height be set within the range of 2.5-3.5m.Preferably,the longitudinal daylighting strip with a width ranging from 0.5-0.8m should be installed.Based on the above relationship function,the PCR can be calculated according to the appropriate light demand for the cultivated crops.The daylighting design theory proposed in this paper can provide a theoretical basis and reference for the healthy development of the PV industry in tropical regions.展开更多
1.Journal of Yunnan Agricultural University is sponsored by Yunnan Agricultural University and has been published since 1986.The journal was initially published semi-annually,and changed to quarterly in1989 and bimont...1.Journal of Yunnan Agricultural University is sponsored by Yunnan Agricultural University and has been published since 1986.The journal was initially published semi-annually,and changed to quarterly in1989 and bimonthly in 2004.As a comprehensive scientific periodical publication in China and abroad,Journal of Yunnan Agricultural University won the titles of Chinese core journals,the core of China’s science and technology journals,the core of China’s agericultural science journals.展开更多
Engineering facilities subjected to natural hazards(such as winds and earthquakes) will result in risk when any designed system(i.e.capacity) will not be able to meet the performance required(i.e.demand).Risk might be...Engineering facilities subjected to natural hazards(such as winds and earthquakes) will result in risk when any designed system(i.e.capacity) will not be able to meet the performance required(i.e.demand).Risk might be expressed either as a likelihood of damage or potential financial loss.Engineers tend to make use of the former(i.e.damage).Nevertheless,other non-technical stakeholders cannot get useful information from damage.However,if financial risk is expressed on the basis of probable monetary loss,it will be easily understood by all.Therefore,it is necessary to develop methodologies which communicate the system capacity and demand to financial risk,Incremental dynamic analysis(IDA) was applied in a performance-based earthquake engineering context to do hazard analysis,structural analysis,damage analysis and loss analysis of a reinforced concrete(RC) frame structure.And the financial implications of risk were expressed by expected annual loss(EAL).The quantitative risk analysis proposed is applicable to any engineering facilities and any natural hazards.It is shown that the results from the IDA can be used to assess the overall financial risk exposure to earthquake hazard for a given constructed facility.The computational IDA-EAL method will enable engineers to take into account the long-term financial implications in addition to the construction cost.Consequently,it will help stakeholders make decisions.展开更多
Time:October 12-16,2013Venue:Moscone Center,San Francisco,California,USA Website:https://www.asahq.org/Annual-Meeting.aspx The theme of ANESTHESIOLOGYTM2013 Annual Meeting is'Global Partners in Quality Outcomes an...Time:October 12-16,2013Venue:Moscone Center,San Francisco,California,USA Website:https://www.asahq.org/Annual-Meeting.aspx The theme of ANESTHESIOLOGYTM2013 Annual Meeting is'Global Partners in Quality Outcomes and Patient Safety',which offers a glimpse of what’s to come as the American Society of Anesthesiologists(ASA)hopes to share world expertise展开更多
Time:September 26-29,2019Venue:HNBK International Convention Center,Taipei,Taiwan,China Website:https://asno2019.tw/Asian Society of Neuro-Oncology(ASNO)2019 Annual Meeting will take place in HNBK International Conven...Time:September 26-29,2019Venue:HNBK International Convention Center,Taipei,Taiwan,China Website:https://asno2019.tw/Asian Society of Neuro-Oncology(ASNO)2019 Annual Meeting will take place in HNBK International Convention Center,Taipei,Taiwan,China on September 26-29,2019.ASNO invites neurosurgeons,neuro-oncologists,and researchers from around the world to submit abstracts for presentation at this meeting.展开更多
Time:December 6-10,2019Venue:Baltimore Convention Center,Baltimore MD,USA Website:https://meeting.aesnet.org/American Epilepsy Society(AES)2019 Annual Meeting will take place in Baltimore Convention Center,Baltimore M...Time:December 6-10,2019Venue:Baltimore Convention Center,Baltimore MD,USA Website:https://meeting.aesnet.org/American Epilepsy Society(AES)2019 Annual Meeting will take place in Baltimore Convention Center,Baltimore MD,USA on December 6-10,2019.From best practices to breakthrough research,the AES 2019 Annual Meeting offers the most extensive education on everything epilepsy and an unparalleled opportunity to network with the brightest minds in the field.展开更多
Time:June 7-10,2020,Venue:Banff,Alberta,Canada,Website:http://congress.cnsfederation.org/The 55th Canadian Neurological Sciences Federation(CNSF)Congress 2020 will take place in Banff,Alberta,Canada on June7-10,2020.T...Time:June 7-10,2020,Venue:Banff,Alberta,Canada,Website:http://congress.cnsfederation.org/The 55th Canadian Neurological Sciences Federation(CNSF)Congress 2020 will take place in Banff,Alberta,Canada on June7-10,2020.This is a collegial meeting providing multidisciplinary courses relevant to all neuroscience specialties.展开更多
Time:October 15-17,2017Venue:San Diego,California,USA Website:2017.myana.org Abstract deadline:September 11,2017The 142nd Annual Meeting of American Neurological Association(ANA2017)will be held on October 15-17,2017 in
Time:December 7-10,2017Venue:San Diego,California,USA Website:www.aaap.org/annual-meeting The Annual Meeting of American Academy of Addiction Psychiatry 2017 will be held on December 7-10,2017 in San Diego,California,...Time:December 7-10,2017Venue:San Diego,California,USA Website:www.aaap.org/annual-meeting The Annual Meeting of American Academy of Addiction Psychiatry 2017 will be held on December 7-10,2017 in San Diego,California,USA.The Annual Meeting and Scientific Symposium provide the latest scientific developments in addiction展开更多
Time:November 9-13,2013City:San Diega,California,USA Tel:(202)962-4000Website:http://www.sfn.org/annual-meeting/neuroscience-2013Neuroscience 2013 is the premier venue for neuroscientists to present emerging science,l...Time:November 9-13,2013City:San Diega,California,USA Tel:(202)962-4000Website:http://www.sfn.org/annual-meeting/neuroscience-2013Neuroscience 2013 is the premier venue for neuroscientists to present emerging science,learn from experts,forge collaborations with peers,explore new tools and technologies,and advance careers.Join more than 30 000 colleagues from more than 80 countries at the world’s largest marketplace of ideas and tools for global neuroscience.This year’s meeting will beheld展开更多
Time:November 9-13,2013City:San Diega,California,USA Tel:(202)962-4000Website:http://www.sfn.org/annual-meeting/neuroscience-2013Neuroscience 2013 is the premier venue for neuroscientists to present emerging science,l...Time:November 9-13,2013City:San Diega,California,USA Tel:(202)962-4000Website:http://www.sfn.org/annual-meeting/neuroscience-2013Neuroscience 2013 is the premier venue for neuroscientists to present emerging science,learn from experts,forge collaborations with peers,explore new tools and technologies,and advance careers.Join more than 30 000 colleagues from more than 80 countries at the world’s largest marketplace of ideas and tools for global neuroscience.This year’s meeting will be held展开更多
基金2024 Science and Technology Commissioner Service Group's Emergency Science and Technology Research Project for Wind Disaster Relief in Hainan Province(ZDYF2024YJGG002-8)China Huaneng Group Co.,Ltd.Headquarters Technology Project,Optimization of Photovoltaic Vegetable Greenhouse Structure and Research on Planting Agronomy in Tropical Regions(HNKJ22-HF77)。
文摘In the tropical regions represented by Hainan,there are abundant solar and thermal resources,and it is relatively suitable for the construction of photovoltaic greenhouse(PVG).However,the construction of PVG still relies mainly on experience and is incapable of quantifying the balance between the photovoltaic(PV)generation and the light requirements for agricultural production.As a result,actual PVGs are primarily PV-based,without carefully considering the needs of agricultural daylighting.To quantify the influence of the design parameters of PVGs and the layout of PV panels on the internal daylighting of serrated PVGs,and to optimize the daylighting design of the roof,this paper utilizes the Design Builder software to establish gradient models for a multi-span serrated-type PVG in tropical regions.Gradient models were established in terms of aspects,namely span,width of longitudinal/transverse daylighting strip,height,roof angle,and photovoltaic panel coverage rate(PCR).Daylighting in the greenhouse of each gradient model was simulated,and with the annual average daily light integral(A_(DLI))and distribution uniformity(DU)as evaluation indicators,the influence of various design parameters on the daylighting inside the greenhouse was quantified.The result reveals that:(1)PCR is the decisive indicator for daylighting in the PVG,and a function between PCR and the A_(DLI) is derived as A_(DLI)=-15.5 PCR+16.841;(2)Increasing the width of longitudinal daylighting strip significantly improves the A_(DLI) and enhances DU while increasing the span has a noticeable effect on improving A_(DLI) but does not significantly enhance DU;(3)Increasing the eave height without changing PCR does not enhance A_(DLI) but effectively improves DU;increasing the transverse daylighting strip and adjusting the roof angle hardly improves A_(DLI).In summary,it is recommended that the optimal span for PVGs in tropical regions be set within the range of 6.5-8.0m,and the eave height be set within the range of 2.5-3.5m.Preferably,the longitudinal daylighting strip with a width ranging from 0.5-0.8m should be installed.Based on the above relationship function,the PCR can be calculated according to the appropriate light demand for the cultivated crops.The daylighting design theory proposed in this paper can provide a theoretical basis and reference for the healthy development of the PV industry in tropical regions.
文摘1.Journal of Yunnan Agricultural University is sponsored by Yunnan Agricultural University and has been published since 1986.The journal was initially published semi-annually,and changed to quarterly in1989 and bimonthly in 2004.As a comprehensive scientific periodical publication in China and abroad,Journal of Yunnan Agricultural University won the titles of Chinese core journals,the core of China’s science and technology journals,the core of China’s agericultural science journals.
基金Project(2011CB013804) supported by the National Basic Research Program of ChinaProject(50925828) supported by the National Natural Science Funds for Distinguished Young Scholars of China
文摘Engineering facilities subjected to natural hazards(such as winds and earthquakes) will result in risk when any designed system(i.e.capacity) will not be able to meet the performance required(i.e.demand).Risk might be expressed either as a likelihood of damage or potential financial loss.Engineers tend to make use of the former(i.e.damage).Nevertheless,other non-technical stakeholders cannot get useful information from damage.However,if financial risk is expressed on the basis of probable monetary loss,it will be easily understood by all.Therefore,it is necessary to develop methodologies which communicate the system capacity and demand to financial risk,Incremental dynamic analysis(IDA) was applied in a performance-based earthquake engineering context to do hazard analysis,structural analysis,damage analysis and loss analysis of a reinforced concrete(RC) frame structure.And the financial implications of risk were expressed by expected annual loss(EAL).The quantitative risk analysis proposed is applicable to any engineering facilities and any natural hazards.It is shown that the results from the IDA can be used to assess the overall financial risk exposure to earthquake hazard for a given constructed facility.The computational IDA-EAL method will enable engineers to take into account the long-term financial implications in addition to the construction cost.Consequently,it will help stakeholders make decisions.
文摘Time:October 12-16,2013Venue:Moscone Center,San Francisco,California,USA Website:https://www.asahq.org/Annual-Meeting.aspx The theme of ANESTHESIOLOGYTM2013 Annual Meeting is'Global Partners in Quality Outcomes and Patient Safety',which offers a glimpse of what’s to come as the American Society of Anesthesiologists(ASA)hopes to share world expertise
文摘Time:September 26-29,2019Venue:HNBK International Convention Center,Taipei,Taiwan,China Website:https://asno2019.tw/Asian Society of Neuro-Oncology(ASNO)2019 Annual Meeting will take place in HNBK International Convention Center,Taipei,Taiwan,China on September 26-29,2019.ASNO invites neurosurgeons,neuro-oncologists,and researchers from around the world to submit abstracts for presentation at this meeting.
文摘Time:December 6-10,2019Venue:Baltimore Convention Center,Baltimore MD,USA Website:https://meeting.aesnet.org/American Epilepsy Society(AES)2019 Annual Meeting will take place in Baltimore Convention Center,Baltimore MD,USA on December 6-10,2019.From best practices to breakthrough research,the AES 2019 Annual Meeting offers the most extensive education on everything epilepsy and an unparalleled opportunity to network with the brightest minds in the field.
文摘Time:June 7-10,2020,Venue:Banff,Alberta,Canada,Website:http://congress.cnsfederation.org/The 55th Canadian Neurological Sciences Federation(CNSF)Congress 2020 will take place in Banff,Alberta,Canada on June7-10,2020.This is a collegial meeting providing multidisciplinary courses relevant to all neuroscience specialties.
文摘Time:October 15-17,2017Venue:San Diego,California,USA Website:2017.myana.org Abstract deadline:September 11,2017The 142nd Annual Meeting of American Neurological Association(ANA2017)will be held on October 15-17,2017 in
文摘Time:December 7-10,2017Venue:San Diego,California,USA Website:www.aaap.org/annual-meeting The Annual Meeting of American Academy of Addiction Psychiatry 2017 will be held on December 7-10,2017 in San Diego,California,USA.The Annual Meeting and Scientific Symposium provide the latest scientific developments in addiction
文摘Time:November 9-13,2013City:San Diega,California,USA Tel:(202)962-4000Website:http://www.sfn.org/annual-meeting/neuroscience-2013Neuroscience 2013 is the premier venue for neuroscientists to present emerging science,learn from experts,forge collaborations with peers,explore new tools and technologies,and advance careers.Join more than 30 000 colleagues from more than 80 countries at the world’s largest marketplace of ideas and tools for global neuroscience.This year’s meeting will beheld
文摘Time:November 9-13,2013City:San Diega,California,USA Tel:(202)962-4000Website:http://www.sfn.org/annual-meeting/neuroscience-2013Neuroscience 2013 is the premier venue for neuroscientists to present emerging science,learn from experts,forge collaborations with peers,explore new tools and technologies,and advance careers.Join more than 30 000 colleagues from more than 80 countries at the world’s largest marketplace of ideas and tools for global neuroscience.This year’s meeting will be held
