In this paper, the properties ofthe solutions ofBoltzm ann-Poisson system in three di- m ensions are considered. The estim ates ofthe energies (the kinetic and the potentialenergies) and the γ-th m om ents w ith γ...In this paper, the properties ofthe solutions ofBoltzm ann-Poisson system in three di- m ensions are considered. The estim ates ofthe energies (the kinetic and the potentialenergies) and the γ-th m om ents w ith γ∈[2,3) are obtained. The latter answ ers an open problem .展开更多
Aquifer thermal energy storage(ATES)system has received attention for heating or cooling buildings.However,it is well known that land subsidence becomes a major environmental concern for ATES projects.Yet,the effect o...Aquifer thermal energy storage(ATES)system has received attention for heating or cooling buildings.However,it is well known that land subsidence becomes a major environmental concern for ATES projects.Yet,the effect of temperature on land subsidence has received practically no attention in the past.This paper presents a thermo-hydro-mechanical(THM)coupled numerical study on an ATES system in Shanghai,China.Four water wells were installed for seasonal heating and cooling of an agriculture greenhouse.The target aquifer at a depth of 74e104.5 m consisted of alternating layers of sand and silty sand and was covered with clay.Groundwater level,temperature,and land subsidence data from 2015 to 2017 were collected using field monitoring instruments.Constrained by data,we constructed a field scale three-dimensional(3D)model using TOUGH(Transport of Unsaturated Groundwater and Heat)and FLAC3D(Fast Lagrangian Analysis of Continua)equipped with a thermo-elastoplastic constitutive model.The effectiveness of the numerical model was validated by field data.The model was used to reproduce groundwater flow,heat transfer,and mechanical responses in porous media over three years and capture the thermo-and pressure-induced land subsidence.The results show that the maximum thermoinduced land subsidence accounts for about 60%of the total subsidence.The thermo-induced subsidence is slightly greater in winter than that in summer,and more pronounced near the cold well area than the hot well area.This study provides some valuable guidelines for controlling land subsidence caused by ATES systems installed in soft soils.展开更多
In this paper, by using holomorphic support f unction of strictly pseudoconvex domain on Stein manifolds and the kernel define d by DEMAILY J P and Laurent Thiebaut, we construct two integral operators T q and S q whi...In this paper, by using holomorphic support f unction of strictly pseudoconvex domain on Stein manifolds and the kernel define d by DEMAILY J P and Laurent Thiebaut, we construct two integral operators T q and S q which are both belong to C s+α p,q-1 (D) and ob tain integral representation of the solution of (p,q)-form b-equation on the boundary of pseudoconvex domain in Stein manifolds and the L s p,q extimates for the solution.展开更多
在保障广播电视机房正常运行方面,机房的备用供电系统发挥了重要作用,其能够有效避免因突发电路故障导致安全播出事故。结合不间断电源(Uninterruptible Power Supply,UPS)的技术原理和特点,按照UPS与双电源自动切换开关(Automatic Tran...在保障广播电视机房正常运行方面,机房的备用供电系统发挥了重要作用,其能够有效避免因突发电路故障导致安全播出事故。结合不间断电源(Uninterruptible Power Supply,UPS)的技术原理和特点,按照UPS与双电源自动切换开关(Automatic Transfer Switch,ATS)组合应用的设计思路,提出一种基于单一ATS双电源接线模式的广播电视机房UPS系统改造方案。该方案旨在确保广播信号安全顺畅传输的基础上,有效降低备用供电系统的建设成本和运维成本。展开更多
On 19 June 2023,the Agreement under the United Nations Convention on the Law of the Sea on the Conservation and Sustainable Use of Marine Biological Diversity of Areas beyond National Jurisdiction(BBNJ Agreement)was a...On 19 June 2023,the Agreement under the United Nations Convention on the Law of the Sea on the Conservation and Sustainable Use of Marine Biological Diversity of Areas beyond National Jurisdiction(BBNJ Agreement)was adopted.The BBNJ Agreement aims to regulate the conservation and sustainable use of marine biodiversity in areas beyond national jurisdiction,including the high seas and the international seabed area.The BBNJ Agreement enters into an already crowded institutional landscape as a global authority with broad objectives,inevitably interacting with existing institutions,frameworks,and bodies(IFBs).Existing research has primarily focused on two areas:the first examines the impact of the institutions established by the BBNJ Agreement on existing marine governance IFBs;the second explores its influence on issues currently lacking institutional arrangements.However,comparatively little attention has been given to the Agreement’s potential impact on governance gaps within established systems.This paper takes the case of marine genetic resource(MGRs)management in the Antarctic Treaty Area to explore how the BBNJ Agreement may address regulatory gaps in a competent governance framework.Due to shortcomings in addressing core issues,concerning the legal status of MGRs access regulations,benefit-sharing mechanisms,and disclosure of origin,the Agreement is unlikely to have a significant impact on the governance of MGRs in the Antarctic Treaty System(ATS)in the short term.On the other hand,the ATS,as an effective governance framework for the Antarctic Treaty Area,has mature regulations and practical experience in Antarctic governance.Over the years,the ATS has focused on regulating bioprospecting activities as scientific research ones and strict environmental impact assessment procedures.However,there has not been an effective consensus on the regulation of commercial biological prospecting.This paper further explores the coordination issue between the BBNJ Agreement and the ATS,suggesting that in the future,MGRs governance in the Antarctic Treaty Area may evolve into a polycentric governance system.展开更多
质量控制图的研究在统计过程控制(Statistical Process Control,简称SPC)中占有很重要的位置,且在实际中得到了很好的应用,也取得了很好的经济效益和社会效益。而ARL(AverageRun Length)和ATS(Average Time to Signal)分别是评价各种静...质量控制图的研究在统计过程控制(Statistical Process Control,简称SPC)中占有很重要的位置,且在实际中得到了很好的应用,也取得了很好的经济效益和社会效益。而ARL(AverageRun Length)和ATS(Average Time to Signal)分别是评价各种静态和动态控制图性质好坏的一个常用的关键指标。到现在为止,关于各种控制图ARL或ATS的计算大致有三种方法:马氏链法、积分方程法和随机模拟,本文将针对各种不同的控制图,对上述前两种方法做一个综述性的总结,以方便研究者和实际工作参考使用。展开更多
文摘In this paper, the properties ofthe solutions ofBoltzm ann-Poisson system in three di- m ensions are considered. The estim ates ofthe energies (the kinetic and the potentialenergies) and the γ-th m om ents w ith γ∈[2,3) are obtained. The latter answ ers an open problem .
基金sponsored by the National Key Research and Development Program of China(Grant No.2020YFC1808102).
文摘Aquifer thermal energy storage(ATES)system has received attention for heating or cooling buildings.However,it is well known that land subsidence becomes a major environmental concern for ATES projects.Yet,the effect of temperature on land subsidence has received practically no attention in the past.This paper presents a thermo-hydro-mechanical(THM)coupled numerical study on an ATES system in Shanghai,China.Four water wells were installed for seasonal heating and cooling of an agriculture greenhouse.The target aquifer at a depth of 74e104.5 m consisted of alternating layers of sand and silty sand and was covered with clay.Groundwater level,temperature,and land subsidence data from 2015 to 2017 were collected using field monitoring instruments.Constrained by data,we constructed a field scale three-dimensional(3D)model using TOUGH(Transport of Unsaturated Groundwater and Heat)and FLAC3D(Fast Lagrangian Analysis of Continua)equipped with a thermo-elastoplastic constitutive model.The effectiveness of the numerical model was validated by field data.The model was used to reproduce groundwater flow,heat transfer,and mechanical responses in porous media over three years and capture the thermo-and pressure-induced land subsidence.The results show that the maximum thermoinduced land subsidence accounts for about 60%of the total subsidence.The thermo-induced subsidence is slightly greater in winter than that in summer,and more pronounced near the cold well area than the hot well area.This study provides some valuable guidelines for controlling land subsidence caused by ATES systems installed in soft soils.
文摘In this paper, by using holomorphic support f unction of strictly pseudoconvex domain on Stein manifolds and the kernel define d by DEMAILY J P and Laurent Thiebaut, we construct two integral operators T q and S q which are both belong to C s+α p,q-1 (D) and ob tain integral representation of the solution of (p,q)-form b-equation on the boundary of pseudoconvex domain in Stein manifolds and the L s p,q extimates for the solution.
文摘在保障广播电视机房正常运行方面,机房的备用供电系统发挥了重要作用,其能够有效避免因突发电路故障导致安全播出事故。结合不间断电源(Uninterruptible Power Supply,UPS)的技术原理和特点,按照UPS与双电源自动切换开关(Automatic Transfer Switch,ATS)组合应用的设计思路,提出一种基于单一ATS双电源接线模式的广播电视机房UPS系统改造方案。该方案旨在确保广播信号安全顺畅传输的基础上,有效降低备用供电系统的建设成本和运维成本。
基金funded by China Arctic and Antarctic Administration(Contract no.JDB2024060701014).
文摘On 19 June 2023,the Agreement under the United Nations Convention on the Law of the Sea on the Conservation and Sustainable Use of Marine Biological Diversity of Areas beyond National Jurisdiction(BBNJ Agreement)was adopted.The BBNJ Agreement aims to regulate the conservation and sustainable use of marine biodiversity in areas beyond national jurisdiction,including the high seas and the international seabed area.The BBNJ Agreement enters into an already crowded institutional landscape as a global authority with broad objectives,inevitably interacting with existing institutions,frameworks,and bodies(IFBs).Existing research has primarily focused on two areas:the first examines the impact of the institutions established by the BBNJ Agreement on existing marine governance IFBs;the second explores its influence on issues currently lacking institutional arrangements.However,comparatively little attention has been given to the Agreement’s potential impact on governance gaps within established systems.This paper takes the case of marine genetic resource(MGRs)management in the Antarctic Treaty Area to explore how the BBNJ Agreement may address regulatory gaps in a competent governance framework.Due to shortcomings in addressing core issues,concerning the legal status of MGRs access regulations,benefit-sharing mechanisms,and disclosure of origin,the Agreement is unlikely to have a significant impact on the governance of MGRs in the Antarctic Treaty System(ATS)in the short term.On the other hand,the ATS,as an effective governance framework for the Antarctic Treaty Area,has mature regulations and practical experience in Antarctic governance.Over the years,the ATS has focused on regulating bioprospecting activities as scientific research ones and strict environmental impact assessment procedures.However,there has not been an effective consensus on the regulation of commercial biological prospecting.This paper further explores the coordination issue between the BBNJ Agreement and the ATS,suggesting that in the future,MGRs governance in the Antarctic Treaty Area may evolve into a polycentric governance system.
文摘质量控制图的研究在统计过程控制(Statistical Process Control,简称SPC)中占有很重要的位置,且在实际中得到了很好的应用,也取得了很好的经济效益和社会效益。而ARL(AverageRun Length)和ATS(Average Time to Signal)分别是评价各种静态和动态控制图性质好坏的一个常用的关键指标。到现在为止,关于各种控制图ARL或ATS的计算大致有三种方法:马氏链法、积分方程法和随机模拟,本文将针对各种不同的控制图,对上述前两种方法做一个综述性的总结,以方便研究者和实际工作参考使用。
