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A fully-customized dataflow engine for 3D earthquake simulation with a complex topography

Science China(Information Sciences) 2022年第5期65卷 65-80页

作者： bingwei chen Haohuan FU Wayne LUK Guangwen YANG Department of Computer Science and Technology Beijing National Research Center for Information Science and Technology Tsinghua University National Supercomputer Center in Wuxi Ministry of Education Key Laboratory for Earth System Modeling Department of Earth System ScienceTsinghua University Department of Computing Imperial College London

With HPC(high performance computing) evolving into the exascale era, improvements in computing performance and power efficiency have become increasingly more important. Based on our previous work on enabling earthquake simulations on a large scale on Sunway Taihu Light, we further explore other possibilities to improve the application through a fully-customized hardware design on reconfigurable FPGA(field programmable gate array) devices. We investigate the feasibility and the potential benefits of a complete fixed-point design. We first perform a coarse-resolution-based simulation to analyze the representation range and precision needed to capture both the total energy and the energy distribution of variables over space and time. We then derive a complete fixed-point design that identifies the suitable bitwidth for major categories of variables and dynamically represents the range through a dynamic scaling scheme. Finally, we use the optimized fixed-point design to run a case of the Wenchuan earthquake to demonstrate the potential of supporting large-scale scientific simulations on FPGA devices. The results demonstrate that an 18-bit fixed-point design already provides an almost identical description of the seismic events in the Wenchuan scenario down to a single-precision floating-point version and provides sustainable performance equivalent to 13.1 Intel Xeon Gold 6154 18-core CPUs or 2.10 Sunway 260-core processors, with performance per watt(power efficiency) improved by 15.3 and 3.72 times compared with the Intel Xeon Gold 6154 18-core CPUs and the Sunway 260-core processors, respectively.

关键词： reconfigurable computing earthquake simulation FPGA hardware-software co-design architecture exploration

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Enhanced Capacitive Desalination Performance of Porous Carbon Spheres@MnO2 Composite

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Chinese Journal of Chemistry 2017年第1期35卷 55-60页

作者： bingwei chen Yanfang Wang Feng Yu Yusong Zhu Lixin Zhang Yuping Wu New Energy and Material Laboratory (NEML) Department of Chemistry & Shanghai Key Laboratory of Molecular Catalysis and lnnovative Material Fudan University Shanghai 200433 China College of Energy and Institute for Electrochemical Energy Storage Nanjing Tech University Nanjing Jiangsu 211816 China

A porous carbon spheres@MnO2 composite is prepared and used as the electrosorption electrode. The MnO2 nanoparticles are evenly distributed on the porous carbon spheres. The as-prepared composite possesses high specific surface area of 258.6 m2·g -1. Its electrochemical evaluations confirm that the composite has high specific capacitance of 175 Fog-1 at a current density of 1 A·g -1 in 0.5 mol·L-1 NaC1 aqueous solution, and shows good conductivity and excellent cycling performance. Electrosorption capacity for the porous carbon spheres@MnO2 composite is 6.28 mg·g-1. Moreover, the composite electrode exhibits excellent recyclability with an efficient regeneration process.

关键词： carbon nanostructure composite electrochemical properties desalination performance

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Spectroscopic/Microscopic Elucid

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Journal of Bioresources and Bioproducts 2019年第3期4卷 58-65页

作者： bingwei chen Xinzhou WANG Weiqi LENG Yu’na KAN Changtong MEI Shengcheng ZHAI College of Materials Science and Engineering Nanjing Forestry UniversityNanjing 210037

The Arundo donax is a typical fast-growing species from the family Gramineae,which is widely cultivated in *** a huge yield of *** in China,this plant offers great potential for biofuels *** different types of organization of cell and the tissue in the *** could influence the efficiency of enzymatic *** this study,*** was subjected to 0.5%(w/w)sulfuric acid(H2SO4)for pretreatment at 140℃for 10 min,20 min,40 min,and 60 min,*** changes in microstructure,chemical composition,topochemical properties were comprehensively *** a series of spectroscopic and microscopic techniques including Fourier transform infrared spectroscopy(FT-IR),X-Ray diffraction(XRD),polarized light microscopy(PLM),and confocal Raman microscopy(CRM)to obtain the correlative structural and chemical *** results of chemical composition,FT-IR spectra and XRD indicated that with increasing reaction time,more hemicellulose and lignin would be ***,there was an obvious increase of the cellulose relative crystallinity via extending reaction *** of the PLM observations showed that the birefringence gradually dimmed due to the diminishing of the cellulose ***,the CRM mapping images showed the lignin component in compound middle lamellar(CML)was difficult to remove relatively as compared with that in secondary *** results indicated that the combination of spectroscopic and microscopic elucidation could give an insightful understanding of chemical changes in cellular level during pretreatment.

关键词： Arundo donax pretreatment topochemistry cellulose lignin

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Si-C Foam Porous-Medium Combustion Power-Generation System for Low-Calorific-Value Biomass Syngas

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Journal of Thermal Science 2025年第1期34卷 206-222页

作者： YANG Jianwen chen Wei CAO bingwei LIU Xinhui LI Hang College of Mechanical and Aerospace Engineering Jilin University School of Mechanical and Vehicle Engineering Changchun University

Syngas produced from the gasification of organic feedstocks from biomass is one of the clean and sustainable sources of *** advantages of simple access and renewability of biomass energy can meet the energy needs of temporary power *** study presents a biomass power-generation system for vehicular *** biomass and a free-piston Stirling engine generator（FPSEG） as the primary material and prime mover,respectively,biomass energy is converted into electricity by combusting the syngas to heat the *** and key parameter design for biomass gasification and thermoelectric conversion systems within a power generation system were performed.A porous medium area was constructed using Si-C foam ceramics to obtain an energy-conversion experimental *** effects of bed height,porosity,porous-region diameter,and air-intake conditions on the power-generation performance were investigated,and optimisations were performed for the thermoelectric conversion *** rate of increase during FPSEG power generation first increased and then decreased with increasing bed height,peaking at a bed height of 40 *** increasing porous-region diameter accelerated FPSEG power generation,whereas porosity changes in the porous media did not significantly affect the rate of change during FPSEG power *** increasing air intake,the rate of increase during power generation first increased and then *** maximum change rate and the highest thermoelectric conversion efficiency of the power-generation system occurred at 9.5 m3/h and 6.5 m3/h（～45.1%）air intakes,*** the thermal inertia and combustion structure of the thermoelectric conversion system significantly increased the power-generation rate of the system,with 1.8 W/s being observed at a 9.7 m3/h air intake.

关键词： biomass combined heat and power (CHP) gasification porous media combustion power generation

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The Relationship between Mental Disorders and Personality of Outpatients in a Psychiatric Clinic in Nanjing, China

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International Journal of Mental Health Promotion 2023年第12期25卷 1287-1302页

作者： Yiteng Zang Biyun Xu Sizhen chen Grace Mutale Qiuyun Cao bingwei chen Department of Epidemiology and Biostatistics School of Public HealthSoutheast UniversityNanjing210009China Medical Statistics and Analysis Center Nanjing Drum Tower HospitalNanjing University Medical SchoolNanjing210008China Department of Clinical Psychology Nanjing Drum Tower HospitalNanjing University Medical SchoolNanjing210008China

Psychosis has increasingly become a social problem,emphasizing the need to understand the relationship between mental disorders and *** study aimed to investigate the relationship between mental disorders and personality among psychiatric outpatients based on real-world *** Checklist 90(SCL-90)and Eysenck Personality Questionnaire(EPQ)were used to evaluate the personality and psychopathological symptoms of patients(n=8409)in the Psychiatric Outpatient Department at Nanjing Drum Tower Hospital.t-test was used to compare scores between patients and national ***’s correlation coefﬁcient and path analysis were used to explore the relationship between mental health status and *** correlation coefﬁcient between the neuroticism(N)score and each factor score of the SCL-90 test,as well as the correlation between psychoticism(P)and hostility and paranoia,exceeded *** analysis revealed that the standardized path coefﬁcients of N score and SCL-90 were all higher than *** addition,the standardized path coefﬁcient of hostility and paranoia on P score were 0.313 and 0.280,*** sensitivity,depression and obsessive-compulsive symptoms were affected by extraversion(E)score,with standardized path coefﬁcients of-0.149,-0.138,and-0.105,*** path analysis also showed the direct and indirect effects of age,gender,education,and marital status on *** characterized as melancholic had higher scores in all factors of *** conclusion,mental health was related to personality traits of neuroticism,psychoticism and introversion.

关键词： Mental disorder personality trait symptom checklist 90 Eysenck personality questionnaire path analysis

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An Aqueous Asymmetric Supercapacitor Based on Activated Carbon and Tungsten Trioxide Nanowire Electrodes

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Chinese Journal of Chemistry 2017年第1期35卷 61-66页

作者： Xinhai Yuan bingwei chen Xiongwei Wu Jun Mo Zaichun Liu Zhengyong Hu Zhonghua Liu Chunjiao Zhou Haijun Yang Yuping Wu College of Science National Research Center of Engineering Technology for Utilization of Functional Ingredients from Botanica College of Agronomy College of Plant Protection Hunan Agricultural University Changsha Hunan 410128 China Department of Chemistry Fudan University Shanghai 200433 China College of Energy and Institute for Electrochemical Energy Storage Nanjing Tech University Nanjing Jiangsu 211816 China

An asymmetric supercapacitor （ASC） was assembled by using an activated carbon as positive electrode and WO3 nanowire as negative electrode, and its electrical performances were tested in voltage windows ranging from 0 to 1.5 V. A high specific capacitance of 51 Fog-1 could be achieved at the current density of 0.25 A·g-1 . Moreover, the ASC displays a good cycling stability with 86% of capacitance retention after 800 cycles, its energy density can be up to 11.9 Wh·kg-1 at the power density of 210 W·kg -1, and remains 7.7 Wh·kg-1 at a power density of 1250 W· kg-1. The excellent electrical performance is perhaps due to the crystal orientation of （001） planes for the WO3 nanowire, which favors the rapid reaction between W（VI） and H＋ cations. This aqueous asymmetric WO3//AC supercapacitor is promising for practical applications due to its easy preparation of WO3.

关键词： asymmetric supercapacitor tungsten trioxide nanowire

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横贯亚洲巨型构造带的基本特征和成矿作用

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岩石学报 2007年第5期23卷 865-876页

作者：陈炳蔚陈廷愚中国地质科学院地质研究所北京100037

本文将位于西伯利亚地台与中朝、塔里木地台之间的广大地区称为横贯亚洲巨型构造带(The Trans-Asian Tectonic Mega-Belt:TATMB)。按其发育历史和构造位置,横贯亚洲巨型构造带可大体分为:(1)阿尔泰-萨彦-蒙古-鄂霍茨克构造带、(2)巴尔喀... 详细信息

本文将位于西伯利亚地台与中朝、塔里木地台之间的广大地区称为横贯亚洲巨型构造带(The Trans-Asian Tectonic Mega-Belt:TATMB)。按其发育历史和构造位置,横贯亚洲巨型构造带可大体分为:(1)阿尔泰-萨彦-蒙古-鄂霍茨克构造带、(2)巴尔喀什-兴安构造带和(3)乌拉尔-南天山构造带等三个大的构造带。阿尔泰-萨彦-蒙古-鄂霍茨克构造带以中央蒙古构造线为南界,以叶尼塞-穆亚断裂、贝加尔断裂及斯塔诺夫南缘断裂为北界,与西伯利亚地台毗邻。巴尔喀什-兴安构造带位于中央蒙古构造线以南;其南界的西段为尼古拉耶夫线及南天山北缘断裂,东段以中-朝地台北缘逆冲断层与中-朝地台直接相连。这一构造带又可分为南、北两大亚带,即巴尔喀什-准噶尔-北、中天山-内蒙-锡林浩特亚带和斋桑-额尔齐斯-南蒙古-大兴安岭亚带。乌拉尔-南天山构造带从中国新疆境内西延经中亚地区直达乌拉尔。夹持该巨型构造带的南、北两大陆块,都发育有太古宙和古元古代的结晶基底和中元古代开始的沉积盖层,并在中元古代早期陆块的边缘都出现过裂解事件。然而位于这两大陆块之间的横贯亚洲巨型构造带地区却未见有中—新元古代的沉积盖层直接不整合覆盖在古老的结晶地块之上,也未见有地壳裂解的直接证据。在一些地区寒武纪地层与新元古代晚期地层是连续的。古生代时,该区以发育各类成分的海底喷发火山岩系为特征,其中包括被动陆缘火山岩、岛弧火山岩和洋壳上的喷发物等。整个构造带大致表现为西伯利亚地台和中朝、塔里木地台南、北两大陆块的相向运动和相向增生过程。其发育时间大致始于新元古代,主要为古生代,止于中生代。从晚三叠世开始,该带进入西太平洋边缘活动阶段。从区域成矿作用的角度来看,该区可分出相应的构造-成矿单元:(1)阿尔泰-萨彦-蒙古-鄂霍茨克构造-成矿带,包括1)阿尔泰-萨彦带和2)蒙古-鄂霍茨克带;(2)巴尔喀什-兴安构造-成矿带,包括1)斋桑-额尔齐斯-南蒙古-大兴安岭带和2)巴尔喀什-准噶尔-北、中天山-内蒙-锡林浩特带;(3)南天山构造-成矿带。主要矿种有金、铀、银、铜、钼、铅锌、钨、锡、稀有金属、铁、镍、云母、宝石、萤石、石墨、菱镁矿和沸石等。区内的成矿作用主要与古生代的岩浆作用和热液活动有关;但在蒙古-鄂霍茨克带主要发生在中生代。

关键词：横贯亚洲巨型构造带基本特征成矿作用

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某型二冲程航空活塞发动机缸头热负荷研究

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重庆理工大学学报（自然科学） 2018年第11期32卷 58-63,92页

作者：陈丙伟陈伟张晨南京航空航天大学能源与动力学院航空发动机热环境与热结构工业和信息化部重点实验室南京210016

某型二冲程航空活塞发动机缸头的冷却形式为风冷,影响缸头热负荷的主要因素包括缸头外部冷却空气流速、缸头燃烧室内燃气温度。以某型二冲程航空活塞发动机缸头为对象,研究缸头在极限工况下的热负荷,分析缸头温度场分布特点,为缸头的散... 详细信息

某型二冲程航空活塞发动机缸头的冷却形式为风冷,影响缸头热负荷的主要因素包括缸头外部冷却空气流速、缸头燃烧室内燃气温度。以某型二冲程航空活塞发动机缸头为对象,研究缸头在极限工况下的热负荷,分析缸头温度场分布特点,为缸头的散热片结构优化设计提供参考依据。以缸内燃气瞬时温度和缸内燃气瞬时传热系数为基础,利用经验公式计算了缸内燃气与缸头内壁的换热边界条件以及缸头外部与冷却空气的换热边界条件。利用有限元数值仿真分析软件对某型二冲程航空活塞发动机缸头热负荷进行了仿真计算,获得缸头的温度场分布。通过对发动机进行地面台架试验测取了缸头在该工况下的特征点温度,试验测量值与仿真值对比,可见仿真结果与试验的误差小于5%,满足工程需要。

关键词：二冲程航空活塞发动机缸头换热边界条件热负荷

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非黑素瘤皮肤癌患者生活质量及影响因素调查

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中华皮肤科杂志 2021年第9期54卷 819-821页

作者：刘倩李国宏陈炳为中国医学科学院、北京协和医学院皮肤病医院整形外科南京210042 东南大学附属中大医院护理部南京210009 东南大学公共卫生学院流行病与卫生统计学系南京210009

目的调查非黑素瘤皮肤癌(NMSC)患者生活质量及其影响因素。方法2017年6月至2020年1月,通过自制问卷及皮肤病生活质量指数量表(DLQI)调查153例在中国医学科学院皮肤病医院整形外科住院接受手术治疗的NMSC患者的人口学、临床、行为学资料... 详细信息

目的调查非黑素瘤皮肤癌(NMSC)患者生活质量及其影响因素。方法2017年6月至2020年1月,通过自制问卷及皮肤病生活质量指数量表(DLQI)调查153例在中国医学科学院皮肤病医院整形外科住院接受手术治疗的NMSC患者的人口学、临床、行为学资料,并计算DLQI评分评估其生活质量。采用χ^(2)检验、Kruskal-Wallis H检验、多因素Logistic回归分析NMSC患者生活质量的影响因素。结果回收有效问卷146份(95.4%)。146例患者年龄31~92岁,101例(69.2%)60岁以上,59例(40.4%)有长期紫外线暴露史。基底细胞癌(BCC)66例(45.2%),侵袭性鳞状细胞癌(SCC)57例(39.0%),乳房外Paget病16例(11.0%)及Bowen病7例(4.8%)。DLQI评分中位数[M(P25,P75)]为3(1,7),99例(67.8%)生活质量受到影响,52例(35.6%)受到轻度影响,47例(32.2%)受到中度以上影响。多因素Logistic回归分析显示,皮肤癌类型、长期紫外线照射史、3个及以上子女数量影响患者的生活质量。结论NMSC降低患者的生活质量,且皮肤癌类型、长期紫外线照射史、子女数量是NMSC患者生活质量的影响因素。

关键词：皮肤肿瘤生活质量疾病影响状态调查问卷调查

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基层医疗机构继续医学教育管理存在的问题及实践分析

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中外医药研究 2023年第31期2卷 166-168页

作者：陈冰伟深圳市宝安区人民医院广东深圳518101

随着医学领域的快速发展,基层医疗机构面临着继续医学教育的挑战。该文针对基层医疗机构继续医学教育的当前状况进行了深入分析,探讨技术进步、医疗服务模式转变、数字化医学教育趋势,以及大规模流行病毒期间对远程教育的推动等方面的... 详细信息

随着医学领域的快速发展,基层医疗机构面临着继续医学教育的挑战。该文针对基层医疗机构继续医学教育的当前状况进行了深入分析,探讨技术进步、医疗服务模式转变、数字化医学教育趋势,以及大规模流行病毒期间对远程教育的推动等方面的挑战。基于上述研究内容提出了一系列前沿的解决策略,并提供了针对基层医疗机构的具体建议。

关键词：基层医疗机构继续医学教育数字化医学远程教育

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