Workability and mechanical property of metakaolin phosphate acid based geopolymer
作者：
Dong, Teng;Zhang, Ying* ;Jiang, Yixuan;Zhao, Guodong;Yu, Xingyu
期刊：
IOP Conference Series: Earth and Environmental Science ,2019年267(2) ISSN：1755-1307
通讯作者：
Zhang, Ying
作者机构：
[Dong, Teng; Yu, Xingyu; Jiang, Yixuan] Univ South China, Sch Civil Engn, Hengyang 421001, Hunan, Peoples R China.;[Zhang, Ying] Univ South China, Sch Design & Art, Hengyang 421001, Hunan, Peoples R China.;[Zhao, Guodong] Univ South China, Sch Resource & Environm & Safety Engn, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Zhang, Ying] U;Univ South China, Sch Design & Art, Hengyang 421001, Hunan, Peoples R China.
会议名称：
3rd International Workshop on Renewable Energy and Development (IWRED)
会议时间：
MAR 08-10, 2019
会议地点：
Guangzhou, PEOPLES R CHINA
会议主办单位：
[Dong, Teng;Jiang, Yixuan;Yu, Xingyu] Univ South China, Sch Civil Engn, Hengyang 421001, Hunan, Peoples R China.^[Zhang, Ying] Univ South China, Sch Design & Art, Hengyang 421001, Hunan, Peoples R China.^[Zhao, Guodong] Univ South China, Sch Resource & Environm & Safety Engn, Hengyang 421001, Hunan, Peoples R China.
会议论文集名称：
IOP Conference Series-Earth and Environmental Science
摘要：
Metakaolin and different molarity of H3PO4 were used to synthesis metakaolin phosphate acid based geopolymer (PAG) at 45°C and humidity more than 98%. The fluidity of fresh PAG decreases from 15.2 mm to 13.1 mm according to the increasing molarity of H3PO4. Initial setting time and final setting time of fresh PAG increases from 21 h to 62 h and 35 h to 87 h with the molarity of H3PO4 increase from 6 mol/L to 12 mol/L respectively. PAG is an early strength material, and the highest strength of PAG is 120.7 MPa at 28 day and strength at 7day is up to 90.8 MPa. Porosity decreases and pore size increases with the increasing molarity of H3PO4, Pore size between 50 nm and 100 nm is dominated in PAG. Some cracks was observed in hardened PAG. © Published under licence by IOP Publishing Ltd.
语种：
英文
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Airborne pollutant dilution inside the deep street canyons subjecting to thermal buoyancy driven flows: Effects of representative urban skylines
作者：
Mei, Shuo-Jun;Hu, Jiang-Tao;Liu, Di* ;Zhao, Fu-Yun* ;Li, Yuguo;...
期刊：
Building and Environment ,2019年149:592-606 ISSN：0360-1323
通讯作者：
Zhao, Fu-Yun;Liu, Di
作者机构：
[Hu, Jiang-Tao; Zhao, Fu-Yun; Mei, Shuo-Jun] Wuhan Univ, Key Lab Hydraul Machinery Transients, Minist Educ, Wuhan, Hubei, Peoples R China.;[Hu, Jiang-Tao; Zhao, Fu-Yun; Mei, Shuo-Jun] Wuhan Univ, Shenzhen Res Inst, Shenzhen, Guangdong, Peoples R China.;[Hu, Jiang-Tao; Zhao, Fu-Yun; Mei, Shuo-Jun] Wuhan Univ, Sch Power & Mech Engn, Dong Hu South Rd, Wuhan 430072, Hubei, Peoples R China.;[Liu, Di] China Univ Petr, Coll Pipeline & Civil Engn, Qingdao, Shandong, Peoples R China.;[Li, Yuguo] Univ Hong Kong, Dept Mech Engn, Pokfulam Rd, Hong Kong, Peoples R China.
通讯机构：
[Zhao, Fu-Yun] W;[Liu, Di] C;Wuhan Univ, Sch Power & Mech Engn, Dong Hu South Rd, Wuhan 430072, Hubei, Peoples R China.;China Univ Petr, Coll Pipeline & Civil Engn, Qingdao, Shandong, Peoples R China.
关键词：
Pollutant retention time;Thermal boundary layer flows;Thermal plume merging;Thermally-driven canyon ventilation;Urban morphology
摘要：
The air flow and pollutant dispersion within a group of street canyons ventilated merely by thermal buoyancy force induced by heated building surfaces are examined by CFD model using SST k-ω turbulence model for different urban skyline configurations. Pollutants emitted from the bottom of street canyon roughly mimic the traffic exhaust releasing. Numerical results are validated well with former theoretical results on thermal boundary flow adjacent to a heated vertical wall. The air exchange rate per hour (ACH) and pollutant retention time are adopted to evaluate the canyon ventilation performance. An exponential relationship could be established between the pollutant retention time and the thermal boundary flow rate. A semi-empirical formula is proposed by using the theoretical results of thermal boundary layer and two empirical constants derived from the present simulation results, which could be used to evaluate the ventilation performance at the urban design. As the convergence flow at the street canyon roof decays from urban rim to urban center, the pollutant retention time differs from canyon to canyon. The “protuberant” skyline configuration is found more effectively in purifying the street canyons at urban edge, in contrast, the “concave” skyline configuration shows higher purification efficiency at urban center. Present research could benefit for design purpose and environmental impact assessment. © 2018 Elsevier Ltd
语种：
英文
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电动-螯合技术修复重金属污染土壤的现状与展望
作者：
肖江;周书葵;李智东;张建;田林玉;...
期刊：
应用化工 ,2019年48(3):632-638 ISSN：1671-3206
作者机构：
南华大学土木工程学院,湖南衡阳,421001;[周书葵; 田林玉; 张建; 肖江; 焦赟仪; 李智东] 南华大学
关键词：
重金属;电动力学;螯合剂;土壤修复
摘要：
综述了电动修复去除土壤中重金属的机理、基本类型、优缺点及螯合物在修复重金属污染土壤的作用机理;概述了电动-螯合联合技术在修复重金属污染土壤的方法、应用及其进展,提出了电动-螯合联合技术修复污染土壤存在的问题和应用前景。
语种：
中文
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回收CRT锥玻璃部分替代高密度磁铁矿砂在防辐射混凝土中应用的可行性
作者：
Liu, Hua-liang;Shi, Jian-jun;Qu, Hui-qiong;Ding, De-xin*
期刊：
中国有色金属学报(英文版) ,2019年29(4):831-839 ISSN：1003-6326
通讯作者：
Ding, De-xin
作者机构：
[Shi, Jian-jun; Liu, Hua-liang; Ding, De-xin] Cent S Univ, Sch Resources & Safety Engn, Changsha 410083, Hunan, Peoples R China.;[Shi, Jian-jun; Liu, Hua-liang] Univ South China, Sch Civil Engn, Hengyang 421001, Peoples R China.;[Qu, Hui-qiong; Ding, De-xin] Univ South China, Sch Nucl Resources Engn, Hengyang 421001, Peoples R China.
通讯机构：
[Ding, De-xin] C;[Ding, De-xin] U;Cent S Univ, Sch Resources & Safety Engn, Changsha 410083, Hunan, Peoples R China.;Univ South China, Sch Nucl Resources Engn, Hengyang 421001, Peoples R China.
关键词：
cathode ray tube;funnel glass;concrete;gamma-ray;radiation shielding;mechanical properties;Monte-Carlo N-Particle simulation
摘要：
The recycled cathode ray tube (CRT)funnel glass was used as replacement of magnetite sand in the concrete, and its mass replacement rates were 0, 20%, 40% and 60%, respectively. The flowability, apparent density and mechanical properties of the radiation shielding concrete were investigated, while its γ-ray radiation shielding parameters such as linear and mass attenuation coefficients (μ and μm, respectively), thickness values of half-value layer (hHVL)and tenth-value layer (hTVL)were obtained by theoretical calculation, experiment and Monte−Carlo N-Particle (MCNP)simulation code. The experimental results show that the flowability of the concrete increases significantly, whilst its apparent density, compressive strength and static elastic modulus decrease slightly. The calculated, simulated and experimental μm, μ, hHVL and hTVL values of all concrete samples are very consistent at the same γ-ray photon energy, and it is feasible to use MCNP code to simulate γ-ray radiation shielding parameters of materials. The calculated results show that in a wide range of γ-ray photon energy, the μm value of the concrete with CRT funnel glass replacing magnetite sand is improved effectively, and its radiation shielding performances are the same as those of the control concrete (M−1). By comprehensively comparing the flowability, mechanical properties and γ-ray radiation shielding properties, the concrete samples with 20%−40% funnel glass as fine aggregate have good performances. © 2019 The Nonferrous Metals Society of China
语种：
英文
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Suitability evaluation of rural tourism based on AHP and fuzzy evaluation method
作者：
Xing, Yunheng;Li, Sheng* ;Liao, Jianjun;Wang, Zhiyuan;Wu, Bo
期刊：
IOP Conference Series: Earth and Environmental Science ,2019年267(3) ISSN：1755-1307
通讯作者：
Li, Sheng
作者机构：
[Xing, Yunheng] Univ South China, Sch Civil Engn, Hengyang 421001, Peoples R China.;[Li, Sheng; Wu, Bo; Wang, Zhiyuan] Univ South China, Sch Architecture, Hengyang 421001, Peoples R China.;[Li, Sheng] Cent South Univ Forestry & Technol, Coll Landscape Architecture, Changsha 410004, Hunan, Peoples R China.;[Liao, Jianjun] Univ South China, Sch Design & Art, Hengyang 421001, Peoples R China.
通讯机构：
[Li, Sheng] U;[Li, Sheng] C;Univ South China, Sch Architecture, Hengyang 421001, Peoples R China.;Cent South Univ Forestry & Technol, Coll Landscape Architecture, Changsha 410004, Hunan, Peoples R China.
会议名称：
3rd International Workshop on Renewable Energy and Development (IWRED)
会议时间：
MAR 08-10, 2019
会议地点：
Guangzhou, PEOPLES R CHINA
会议主办单位：
[Xing, Yunheng] Univ South China, Sch Civil Engn, Hengyang 421001, Peoples R China.^[Li, Sheng;Wang, Zhiyuan;Wu, Bo] Univ South China, Sch Architecture, Hengyang 421001, Peoples R China.^[Li, Sheng] Cent South Univ Forestry & Technol, Coll Landscape Architecture, Changsha 410004, Hunan, Peoples R China.^[Liao, Jianjun] Univ South China, Sch Design & Art, Hengyang 421001, Peoples R China.
会议论文集名称：
IOP Conference Series-Earth and Environmental Science
摘要：
In order to study the suitability of rural tourism development and prevent the blind development of rural tourism, we have identified 12 evaluation indicators of natural resources and human resources from three aspects: tourism resources, current development intensity and village development potential. Using AHP and fuzzy evaluation method to quantitatively analyze the various elements of rural tourism development, and evaluate the suitability of village development tourism industry. © Published under licence by IOP Publishing Ltd.
语种：
英文
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Thermal buoyancy driven flows inside the industrial buildings primarily ventilated by the mechanical fans: Local facilitation and infiltration
作者：
Mei, Shuo-Jun;Hu, Jiang-Tao;Liu, Di* ;Zhao, Fu-Yun* ;Wang, Han-Qing
期刊：
Energy and Buildings ,2018年175:87-101 ISSN：0378-7788
通讯作者：
Zhao, Fu-Yun;Liu, Di
作者机构：
[Hu, Jiang-Tao; Zhao, Fu-Yun; Mei, Shuo-Jun] Wuhan Univ, Key Lab Hydraul Machinery Transients, Minist Educ, Wuhan, Hubei, Peoples R China.;[Hu, Jiang-Tao; Zhao, Fu-Yun; Mei, Shuo-Jun] Wuhan Univ, Hubei Key Lab Waterjet Theory & New Technol, Wuhan, Hubei, Peoples R China.;[Hu, Jiang-Tao; Zhao, Fu-Yun; Mei, Shuo-Jun] Wuhan Univ, Sch Power & Mech Engn, Wuhan 430072, Hubei, Peoples R China.;[Liu, Di] China Univ Petr, Coll Pipeline & Civil Engn, Qingdao, Shandong, Peoples R China.;[Wang, Han-Qing] Univ South China, Sch Civil Engn, Hengyang, Hunan, Peoples R China.
通讯机构：
[Zhao, Fu-Yun] W;[Liu, Di] C;Wuhan Univ, Sch Power & Mech Engn, Wuhan 430072, Hubei, Peoples R China.;China Univ Petr, Coll Pipeline & Civil Engn, Qingdao, Shandong, Peoples R China.
关键词：
Local ventilated cooling;Mechanical assisted natural ventilation;Natural ventilation of industrial buildings;On-site measurements
摘要：
The turbine hall houses a number of components with intense heat release, resulting in a hot and humid air environment and making it very unpleasant for plant staffs to conduct maintenance work there, particularly at a hot outdoor environment. The traditional pure buoyancy driven natural ventilated could fulfil the overall heat exhausting requirement, however, creating hot environment at several positions due to the vortex airflow structure. As only part of the building need to be cooled, a localized cooling system with assisting mechanical fans is used. Buoyancy driven natural ventilated flows primarily occupying this turbine hall have been investigated by a computational fluid dynamics (CFD) model and an on-site measurement. The ventilation airflow is solved by 3D steady state Reynolds Averaged Navier-Stokes (RANS) equations in conjunction with the SST k-ω turbulence model. The numerical codes and procedures were validated by comparing with on-site measurements. The concept of mean age of air is used to evaluate the natural ventilated efficacy. Following that, the potential of using mechanical vents and slabs to cool equipment work area at this buoyancy driven natural ventilated hall is analysed. The simulation results show that the mechanical vents could decrease air temperature and increase air exchange efficiency at work area effectively on condition that the local airflow pattern is well organized, which is strongly related to the ejection direction and velocity. Present research could benefit future development of the ventilation design in the power plant buildings. © 2018 Elsevier B.V.
语种：
英文
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基于MIDAS-GEN的地下综合管廊抗震分析
作者：
黄涌泉;黄仕元;唐跃玉
期刊：
山西建筑 ,2018年44(14):42-43 ISSN：1009-6825
作者机构：
南华大学土木工程学院,湖南衡阳,412000
关键词：
地下管廊;反应位移法;有限元软件
摘要：
以国内某地下综合管廊为背景,基于反应位移法的基础上,利用MIDAS-GEN有限元软件研究地下管廊结构在多遇地震和罕遇地震作用下内力分布规律,得出了一些有意义的结论。
语种：
中文
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隔氧水热反应制备单分散炭微球的实验研究
作者：
晏垚;王劲松;虢清伟;卓琼芳;揭波;...
期刊：
现代化工 ,2018年38(8):85-89 ISSN：0253-4320
通讯作者：
Wang, J.-S.
作者机构：
南华大学土木工程学院, 湖南, 衡阳, 421001;环境保护部华南环境科学研究所, 广东, 广州, 510655;[晏垚; 王劲松; 韩科昌] 南华大学土木工程学院, 湖南, 衡阳, 421001;[虢清伟; 卓琼芳; 揭波] 环境保护部华南环境科学研究所, 广东, 广州, 510655
通讯机构：
School of Civil Engineering, University of South China, Hengyang, China
关键词：
炭微球;氮气保护;氨水辅助;水热碳化法;溶解氧
摘要：
以葡萄糖为前驱物,在氮气保护氨水辅助的隔氧体系中水热合成单分散炭微球。考察了不同碳源、配料种类、氨水浓度和通氮时间对炭微球粒径分布和形貌的影响。采用SEM、BET、XRD、FT-IR、XPS、粒度仪对炭微球的形貌和成分进行表征,用差热法分析了炭微球的热稳定性。结果表明,氨水浓度与通氮气保护对炭微球的形貌与粒径分布影响显著,在0.1 g/mL葡萄糖溶液、0.05 mol/L氨水溶液和以200 cm~3/min的速率通入氮气保护20 min的实验条件下,可制备出平均粒径为11.5 μm且表面富含官能团-OH、C=O、-COOH的单分散炭微球。
语种：
中文
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数据中心自然冷却及其节能潜力分析
作者：
廖婉婷;赵福云;刘娣;王汉青
期刊：
建筑热能通风空调 ,2018年37(4):10-14+29 ISSN：1003-0344
作者机构：
[赵福云; 廖婉婷] 水力机械过渡过程教育部重点实验室;水射流理论与新技术湖北省重点实验室;武汉大学动力与机械学院;中国石油大学(华东)储运与建筑工程学院;南华大学土木工程学院
关键词：
数据中心;数值模拟;空气侧直接自然冷却
摘要：
数据中心在制冷上的能耗依然能够占到其总能耗的50%,降低制冷能耗备受关注。本文通过数值模拟对典型数据中心模型进行模拟计算,得到空气侧自然冷却模式下环境送风温度范围,并探究了全国省会城市利用空气侧自然冷却的节能潜力。
语种：
中文
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Bonded Sleeve Connections for Joining Tubular Glass Fiber-Reinforced Polymer Beams and Columns: Experimental and Numerical Studies
作者：
Zhang, Zhu Jing;Bai, Yu* ;Xiao, Xiao
期刊：
Journal of Composites for Construction ,2018年22(4):04018019-null ISSN：1090-0268
通讯作者：
Bai, Yu
作者机构：
[Bai, Yu; Zhang, Zhu Jing] Monash Univ, Dept Civil Engn, Clayton, Vic 3800, Australia.;[Xiao, Xiao] Univ South China, Sch Civil Engn, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Bai, Yu] M;Monash Univ, Dept Civil Engn, Clayton, Vic 3800, Australia.
关键词：
Fiber-reinforced composite;Pultrusion;Beam-column connection;Finite element modeling;Tubular member;Bonded sleeve connection;Bolted connection;Adhesive bonding
摘要：
A bonded sleeve connection was developed for joining tubular glass fiber-reinforced polymer (GFRP) beams and columns. It utilizes a sleeve connector made by welding a steel tube to a steel endplate. The steel tube is then inserted into and adhesively bonded with the GFRP beam end and the endplate is connected to the GFRP column using through-bolts. Four beam-to-column specimens with different bond lengths between the GFRP beam and steel tube and different numbers of bolts were tested. The moment-rotation responses, failure modes, and local strain responses were experimentally received and comparatively studied. The measured initial rotational stiffness of the proposed bonded sleeve connections was evaluated against a standard classification and compared to existing connection systems. Numerical analysis was also performed through finite element (FE) modeling. Paired contact elements and pretension elements were used to model the bolted connections, taking into account effects of friction, pretension force, and bolt hole clearance. Relevant failure criteria were also used to indicate yielding of the steel endplate and cohesive failure. Modeling and experimental results compared well in terms of moment-rotation behavior and failure modes. Further parametric study evidenced dominant effects of endplate thickness on the initial rotational stiffness of the connections.
语种：
英文
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Effects of Aquatic Plants in Constructed Wetlands to Removal of Water Pollutants
作者：
Duan, Zhiyong* ;Xie, Shuibo;Chen, Zhenfu;Wang, Jingsong;Li, Zhi
作者机构：
[Wang, Jingsong; Xie, Shuibo; Chen, Zhenfu; Li, Zhi; Duan, Zhiyong] Univ South China, Sch Civil Engn, Hengyang 421001, Hunan, Peoples R China.
会议名称：
18th Annual World Environmental and Water Resources Congress of the Environmental-and-Water-Resources-Institute (EWRI)
会议时间：
JUN 03-07, 2018
会议地点：
Minneapolis, MN
会议主办单位：
[Duan, Zhiyong;Xie, Shuibo;Chen, Zhenfu;Wang, Jingsong;Li, Zhi] Univ South China, Sch Civil Engn, Hengyang 421001, Hunan, Peoples R China.
会议论文集名称：
World Environmental and Water Resources Congress 2018: Water, Wastewater, and Stormwater; Urban Watershed Management; Municipal Water Infrastructure; and Desalination and Water Reuse
摘要：
Constructed wetlands technology is an important type of wastewater treatment technologies. Compared with other wastewater treatment technologies, the aquatic plants are special components in constructed wetlands for water pollutants removal. However, the comprehensive functions of aquatic plants in constructed wetlands were little emphasized before. In this study, the comprehensive functions and effects of aquatic plants in constructed wetlands to the water pollutants removal are investigated. Multiple common used aquatic plants are compared with their biomass, nitrogen and phosphorus absorption capacity, and oxygen secretion by root systems. These are used to investigate the mechanisms of the functions of aquatic plants in water pollutants removal in constructed wetlands. In this study it is found different types of aquatic plants have different comparable advantages in biomass, nitrogen and phosphorus absorption capacity, and oxygen secretion by root systems. The aquatic plants in constructed wetlands provide dissolved oxygen to the environment around their roots. The aquatic plants themselves have absorption for the nitrogen and phosphorus to directly removal them from the wastewater. Their roots together with the fillers in the constructed wetlands establish the habitat environment for the microorganisms which degrade the water pollutants. The aquatic plants play important and special roles in constructed wetlands for wastewater treatment. These findings can be used for the improvement of the water pollutants removal efficiency in constructed wetlands. The improved constructed wetlands can be used for eutrophication control with higher efficiency.
语种：
英文
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减少渗流对尾矿坝稳定性影响的措施探讨
作者：
杨帆
期刊：
建筑工程技术与设计 ,2018年(5):296-297 ISSN：2095-6630
作者机构：
南华大学土木工程学院结构工程系湖南衡阳421001
关键词：
渗流;尾矿坝;稳定性;影响因素
摘要：
我国90%以上的尾矿坝都是上游式尾矿坝，浸润线过高或渗流作用的影响是造成上游式尾矿坝失事事故主要原因之一。据现有资料表明，渗流作用是引起尾矿坝坝体失稳破坏的主要因素之一。本文深入分析影响尾矿坝稳定性的因素，着重分析渗流作用对尾矿坝稳定性的影响，并提出减少渗流影响的有关建议。
语种：
中文
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Study on Monitoring of Deep Foundation Pit with SMW Engineering Method plus Anchor Cable Retaining Structure
作者：
Chen, Wenzhao* ;Cui, Wenping
期刊：
AIP Conference Proceedings ,2018年1944(1):96-101 ISSN：0094-243X
通讯作者：
Chen, Wenzhao
作者机构：
[Cui, Wenping; Chen, Wenzhao] Univ South China, Sch Civil Engn, Hengyang 421001, Peoples R China.
通讯机构：
[Chen, Wenzhao] U;Univ South China, Sch Civil Engn, Hengyang 421001, Peoples R China.
会议名称：
2nd International Workshop on Advances in Energy Science and Environment Engineering (AESEE)
会议时间：
FEB 02-04, 2018
会议地点：
Zhuhai, PEOPLES R CHINA
会议主办单位：
[Chen, Wenzhao;Cui, Wenping] Univ South China, Sch Civil Engn, Hengyang 421001, Peoples R China.
会议论文集名称：
AIP Conference Proceedings
摘要：
The SMW method has many advantages, such as little influence on the surrounding environment, good watertight performance, wide range of application, short construction period, low cost and so on. In this paper, we chose the SMW engineering method combined with anchor cable to support structure in the second phase deep foundation pit of Jinan LuJinDongCheng as the research object, monitored and analysed the horizontal displacement of the pile top, Peripheral surface subsidence and internal force of the anchor cable in the foundation pit. We also discussed the displacement, internal force of anchor cable and the settlement of surrounding environment in the excavation of foundation pit and in different stages of construction. Conclusion:(1)The maximum horizontal displacement of the retaining structure is closely related to the depth and time of excavation, the construction of anchor cable can well limit the deformation of pile body; (2)Groundwater seepage caused by foundation pit dewatering will change the effective stress of soil. The change of groundwater level has an important influence on the working behavior of smw anchor cable supporting structure.
语种：
英文
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RTK 测量误差来源及对治方法浅析
作者：
晏冲为;戴海波;刘苏洲
期刊：
建筑工程技术与设计 ,2018年(28):107 ISSN：2095-6630
作者机构：
南华大学土木工程学院?湖南长沙?410002;望城经开区投（融）资管理办公室?湖南长沙?410000;长沙县国土资源局湖南长沙4100009
关键词：
RTK 仪器;误差;观测误差;外界环境
摘要：
RTK 作为现代测绘必备产品在测量中较其它常规测绘仪器有明显优势，现如今已经非常普及，而在实际工作中难免有测量误差的出现，本文将从仪器误差，观测误差，外界环境三个方面分析可能产生误差的原因，并提供了相应的对治方法，从而将测量误差降到最低。
语种：
中文
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装配式辐射供冷顶板性能的数值模拟
作者：
谢东;刘金芝;王汉青
期刊：
南华大学学报(自然科学版) ,2018年32(6):15-21 ISSN：1673-0062
作者机构：
建筑环境控制技术湖南省工程实验室,湖南 衡阳421001;装配式建筑节能技术湖南省重点实验室,湖南 衡阳421001;南华大学 土木工程学院,湖南 衡阳421001
关键词：
装配式辐射顶板;CFD模拟;供冷性能;表面温度分布
摘要：
为提高装配式辐射供冷顶板的性能,建立了一种采用空气层进行热量交换的装配式辐射供冷顶板的数学模型,应用CFD(computational fluid dynamics)技术,数值模拟了耦合冷冻水管辐射顶板空气层的流场和温度场,分析了不同空气层厚度和不同供水温度对辐射顶板热特性的影响.数值模拟结果表明:空气层内由于温度差引起自然对流,辐射板内通过辐射,对流和导热的传热方式,使辐射板表面温度分布更均匀.在保证辐射板表面最低温度高于室内露点温度的条件下,随着空气层厚度和供水温度的增加,辐射板的表面平均温度升高,供冷能力下降.空气层厚度和供水温度的增加或减小会降低辐射板表面温度分布的均匀性.
语种：
中文
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贯穿钢筋在波形PBL连接件中的影响研究
作者：
赵洪智;李明;朱旭东
期刊：
南华大学学报(自然科学版) ,2018年32(6):22-27 ISSN：1673-0062
作者机构：
南华大学 土木工程学院,湖南 衡阳,421001;[赵洪智; 朱旭东; 李明] 南华大学
关键词：
贯穿钢筋;波形PBL连接件;推出试验;极限抗剪承载力
摘要：
为了研究贯穿钢筋直径对波形PBL连接件极限抗剪承载力的影响,设计了贯穿钢筋直径分别为16 mm、20 mm和25 mm三组PBL连接件推出试验试件,通过使用5 000 k N的加载试验机对试件进行加载试验,测量出试件中工字钢与混凝土板之间的相对位移,并绘制出试件的荷载位移曲线.试验结果表明,当贯穿钢筋直径从16 mm增加到20 mm时,波形PBL连接件的抗剪承载力随着贯穿钢筋直径的增加而提高,当贯穿钢筋直径从20 mm变到25 mm时,波形PBL连接件的抗剪承载力虽在增加但增幅明显下降.
语种：
中文
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Poly (-cyclodextrin)/bentonite composite: synthesis mechanism and adsorption property for cesium in water
作者：
Liu, Hongjuan* ;Xie, Shuibo* ;Zhang, Xichen;Liu, Yingjiu;Zeng, Taotao
期刊：
Journal of Radioanalytical and Nuclear Chemistry ,2018年318(3):2117-2127 ISSN：0236-5731
通讯作者：
Liu, Hongjuan;Xie, Shuibo
作者机构：
[Liu, Hongjuan] Univ South China, Inst Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Liu, Hongjuan; Xie, Shuibo; Liu, HJ] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Peoples R China.;[Xie, Shuibo; Liu, Yingjiu; Zhang, Xichen; Zeng, Taotao] Univ South China, Hunan Prov Key Lab Pollut Control & Resources Reu, Hengyang 421001, Peoples R China.
通讯机构：
[Liu, Hongjuan; Liu, HJ; Xie, SB; Xie, Shuibo] U;Univ South China, Inst Nucl Sci & Technol, Hengyang 421001, Peoples R China.;Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Peoples R China.;Univ South China, Hunan Prov Key Lab Pollut Control & Resources Reu, Hengyang 421001, Peoples R China.
关键词：
Bentonite;beta-CD/BNC;Cesium;Characterization;Adsorption
摘要：
A poly(β-Cyclodextrin)/bentonite composite (β-CD/BNC) were characterized by N2–BET measurement, scanning electron microscopy, energy dispersive spectrometer, fourier transform infrared spectroscopy, thermogravimetric analysis and X-ray photoelectron spectroscopy. Its synthesis mechanism of graft polymerisation was expounded. The maximum sorption capacities of Cs+ onto β-CD/BNC in absence and presence of Cl− and CO3 2− were 48.83 mg g−1, 48.90 mg g−1, and 46.19 mg g−1, respectively. The effect of Cl− and CO3 2− on Cs+ adsorption was not obvious. β-CD/BNC displayed good stability and reusability. The main adsorption mechanism of cesium by β-CD/BNC was ion exchange, and the surface coordination was subordinated mechanism. © 2018, Akadémiai Kiadó, Budapest, Hungary.
语种：
英文
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“工程热力学”专业“研讨课”的设计与实践
作者：
顾炜莉;刘源全;胡艳
期刊：
中国建设教育 ,2018年(03):14-17
作者机构：
南华大学土木工程学院
关键词：
工程热力学;研讨课;设计与实践
摘要：
"研讨课"是一种调动学生学习积极性,培养学生综合能力的教学模式。文章从理论教学内容调整、学时调整和研讨课人数的确定,研讨内容的设计,教师、学生角色的转变以及研讨场所的要求等方面提出了"工程热力学"专业"研讨课"的设计模式。实践证明,达到了预期目标,具有推广价值。
语种：
中文
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铀矿排风井周边地表大气氡致辐射效应的数值模拟
作者：
叶勇军;李实;黄春华;丁德馨;钟永明;...
期刊：
南华大学学报(自然科学版) ,2018年32(1):1-9 ISSN：1673-0062
作者机构：
南华大学 环境与安全工程学院,湖南 衡阳421001;南华大学 铀矿冶生物技术国防重点学科实验室,湖南 衡阳421001;南华大学 环境与安全工程学院,湖南 衡阳,421001;南华大学 土木工程学院,湖南 衡阳,421001;南华大学 铀矿冶生物技术国防重点学科实验室,湖南 衡阳,421001
关键词：
高斯烟羽模型;铀矿排风井;氡浓度;公众个人剂量
摘要：
为了指导铀矿排风井周边地表环境的辐射防护设计,基于放射性气态流出物大气扩散的高斯烟羽模型,建立了铀矿排风井周边地表年均氡浓度以及公众个人年有效剂量的数学计算模型,研究了排风井气态流出物初始氡浓度、排风风量和源强对排风井周边地表1 km范围内年均氡浓度以及公众个人年有效剂量分布的影响.结果表明,在其他参数不变的情况下,年均氡浓度和公众个人年有效剂量的最大值随气态流出物初始氡浓度的增加而增大,随排风风量的增加而减小;最大值离井口的距离和氡致辐射的影响范围随初始氡浓度的增加而增大,随排风风量的增加而减小;相同源强下,最大值随气态流出物的初始氡浓度增加而增大,随排风风量的增大而减小;最大值离井口的距离随排风风量的增加而增大.最后,根据所得结论提出铀矿排风井周边的辐射防护建议.
语种：
中文
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悬臂输流管道在端部随从力作用下的稳定性
作者：
陶立佳;郭长青;童立明
期刊：
南华大学学报(自然科学版) ,2018年32(1):53-57 ISSN：1673-0062
作者机构：
南华大学 土木工程学院,湖南 衡阳,421001;[郭长青; 童立明; 陶立佳] 南华大学
关键词：
端部随从力;悬臂输流管道;稳定性;临界流速;发散失稳;颤振失稳
摘要：
对在端部随从力和流体流动共同作用下的输流管道,以欧拉伯努利梁为基础建立管道的运动微分方程,并以梁的振型函数为试函数,采用伽辽金方法对方程进行离散.通过对特征值分析,研究了不同参数对悬臂输流管道振动与稳定性的影响以及无量纲复频率与系统失稳临界流速的关系.结果表明:端部随从力的变化对系统失稳临界流速有很大的影响;系统的失稳方式和临界流速的大小有关;系统的失稳方式主要以发散失稳和单模态颤振失稳为主.
语种：
中文
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