基于MapGIS数据中心的人体经络信息系统研究
作者:
吴德华;吴贝贝;郭怡新;沈泽康
期刊:
电脑知识与技术 ,2022年18(15):130-132 ISSN:1009-3044
作者机构:
湖南城市学院市政与测绘工程学院,湖南益阳413000;[沈泽康; 郭怡新; 吴贝贝; 吴德华] 湖南城市学院
关键词:
经络;数据中心;空间分析;目录树
摘要:
针对传统人体经络表现形式的不足和目前人体经络信息系统在空间分析方面的缺陷,该文提出采用基于"面向服务GIS架构"的数据中心集成开发技术构建人体经络信息系统的思想,以目录树的形式对人体经络数据进行层次化管理,采用搭建式、配置式开发快速构建系统原型,以插件式开发技术扩展功能模块,并实现了人体经络的空间定位、信息查询、缓冲区分析等功能.实验结果表明,基于数据中心集成开发技术的人体经络信息系统能够"应需而变",利用缓冲区分析、反射区分析等空间分析功能在中医教学和临床诊断方面提供辅助决策支持,为人体经络信息化研究提供了一种新的思路.
语种:
中文
展开
ZnO/g-C3N4 Nanostructured Photocatalyst for Enhancement of Photodegradation of Antibiotic Pollutant in Wastewater under Simulated solar Light Illumination
作者:
Chi, Nianping;Yuan, Xinyi;Sun, Wen
期刊:
International Journal of Electrochemical Science ,2022年17(9) ISSN:1452-3981
通讯作者:
Chi, N.
作者机构:
School of Municipal and Geomatics Engineering, Hunan City University, Hunan Province Engineering &Technology Research Center for Rural Water Quality Safety, Hunan, Yiyang, 413000, China;School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215009, China
通讯机构:
School of Municipal and Geomatics Engineering, Hunan City University, Hunan Province Engineering &Technology Research Center for Rural Water Quality Safety, Hunan, Yiyang, China
关键词:
Antibiotic pollutant;Pharmaceutical industry wastewater;Photocatalyst;Tetracycline hydrochloride;Zno/g-c3n4
摘要:
The fabrication and characterization of a ZnO/g-g-C3N4 nanostructured photocatalyst for improving photodegradation of tetracycline hydrochloride (TC-HCl) as an antibiotic pollutant in wastewater under simulated solar light were given in this study. The ZnO/g-C3N4 nanostructure was synthesized using the deposition–precipitation method, and the morphology and structure of the photocatalyst revealed that the hybrid structure was composed of well-crystalline ZnO nanostructures and homogeneously dispersed g-g-C3N4 nanosheets, implying a homogeneous and strong interaction of g-g-C3N4 with ZnO nanostructures. The optical band gap values of g-g-C3N4, ZnO, and ZnO/g-g-C3N4 hybrid structures were calculated to be 2.70, 3.16, and 2.90 eV, respectively, based on the optical properties. Electrochemical experiments revealed that the ZnO/g-g-C3N4 hybrid structure has a higher interfacial charge transfer efficiency, less recombination of photogenerated electron–hole pairs, and enhanced electron mobility and diffusion. Using g-g-C3N4, ZnO, and ZnO/g-g-C3N4 hybrid structures, 88%, 65%, and 100% degradation efficiencies were obtained for treatment of 200 mL of 10 mg/L of TC-HCl aqueous solution after 45 minutes of simulated solar light illumination, respectively, implying that the ZnO/g-g-C3N4 heterojunction can remarkably improve solar light photocatalytic activity. Finally, the data showed that ZnO/g-g-C3N4 hybrid photodegradation was effective in treating TC-HCl from real pharmaceutical industrial effluent. © 2022. The Authors. Published by ESG (www.electrochemsci.org). This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/4.0/).
语种:
英文
展开
Influence of Underground Tunnel Excavation on Upper-level Existing Pipelines
作者:
Feng, Xingfa;Yang, Xian;Li, Yongsuo;Ding, Xingyu
期刊:
Advances in Civil Engineering ,2022年2022 ISSN:1687-8086
通讯作者:
Yang, X
作者机构:
[Feng, Xingfa] Chongqing Eenineering Grp Co Ltd, CCTEG, Chongqing 40000, Peoples R China.;[Yang, X; Yang, Xian; Ding, Xingyu] Hunan City Univ, Coll Civil Engn, Yiyang 4130003, Huhan, Peoples R China.;[Li, Yongsuo] Hunan City Univ, Sch Municipal & Geomat Engn, Yiyang 4130003, Huhan, Peoples R China.
通讯机构:
[Yang, X ] H;Hunan City Univ, Coll Civil Engn, Yiyang 4130003, Huhan, Peoples R China.
摘要:
Winkler elastic foundation beam theory is often used to observe the influence of underground engineering construction on pipelines. Excavation under existing pipelines disturbs the lower strata to varying extent, which creates significant differences in the subgrade coefficients. Ignoring these differences can severely impact the accuracy of calculation results. A theoretical model of the effects of underground excavation on upper-level existing pipelines was developed in this study based on Winkler elastic foundation beam theory and considering the difference of subgrade coefficients under the existing pipeline. Methods for determining the subgrade coefficient under the influence of construction disturbance and other relevant parameters are proposed. The theoretical model can be used to calculate the settlement of an existing pipeline under the influence of underground excavation. The calculated settlement was compared with settlement measurements to find that the subgrade coefficient of the excavation section is the most important parameter in the calculation process. The suitable value range of the excavation subgrade coefficient is relatively large, as it has a relatively minor influence on the calculation result. When the value of subgrade coefficient of each section is appropriate, the calculated settlement curve is in close accordance with the measured settlement curve. © 2022 Xingfa Feng et al.
语种:
英文
展开
预处理+催化内电解+陶瓷膜A/O-MBR处理焦化废水
作者:
池年平;汪爱河
期刊:
中国给水排水 ,2022年38(20):120-123 ISSN:1000-4602
作者机构:
[汪爱河; 池年平] 湖南城市学院市政与测绘工程学院湖南省村镇饮用水水质安全保障工程技术研究中心,湖南益阳413000
关键词:
焦化废水;陶瓷膜生物反应器;催化内电解
摘要:
某焦化废水处理项目设计处理规模为1 000 m~3/d,处理废水为氨蒸废水、地坪清扫水等的混合废水,采用以陶瓷膜A/O-MBR生物反应器为核心的预处理+催化内电解+陶瓷膜A/OMBR组合处理工艺。实际运行结果表明,该工艺对COD、氨氮和酚类的去除率分别达到97.25%、 94.64%和99.98%,出水水质达到《炼焦化学工业污染物排放标准》(GB 16171-2012)中的间接排放标准,运行成本为10.01元/m~3。
语种:
中文
展开
复合串行气化工艺半经验动力学模型研究
作者:
向夏楠;周雪花;彭德用;孙驰;王波;...
期刊:
热力发电 ,2022年51(10):184-193 ISSN:1002-3364
作者机构:
[周雪花; 向夏楠; 张新宇; 王波; 彭德用; 孙驰] 湖南城市学院市政与测绘工程学院
关键词:
流化床;复合串行气化;间歇气化;半经验模型;动力学模型
摘要:
研究了一种煤与固体废弃物复合串行气化工艺。以木屑为例,通过利用实测的气化炉分区温度结合流体动力学和气化反应动力学,建立了复合串行气化工艺的半经验动力学模型,并研究了气化温度、水蒸气与固体废弃物质量比(S/M)和固体废弃物与煤质量比(M/C)等关键参数对气化规律的影响。结果表明:该气化工艺采用水蒸气气化,无需外部热源,可生产中热值合成气;提高气化温度对气化结果有利,最佳气化温度为1 010 ℃,最佳S/M为1.4;气化工艺中应尽可能提高M/C值,本模型最佳M/C值为4。研究结果可为复合串行气化工艺的运行和优化提供参考和理论依据。
语种:
中文
展开
Fabrication, application, and mechanism of metal and heteroatom co-doped biochar composites (MHBCs) for the removal of contaminants in water: A review
作者:
Liu, Yihuan;Chen, Yaoning;Li, Yuanping;Chen, Li;Jiang, Hongjuan;...
期刊:
Journal of Hazardous Materials ,2022年431:128584 ISSN:0304-3894
通讯作者:
Chen, YN;Li, YP
作者机构:
[Zhao, Mengyang; Chen, Yaoning; Hou, Suzhen; Tang, Ping; Liu, Yihuan; Chen, Li; Jiang, Hongjuan; Luo, Xinli; Yuan, Yu; Yan, Haoqin] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Peoples R China.;[Zhao, Mengyang; Hou, Suzhen; Tang, Ping; Liu, Yihuan; Chen, Li; Jiang, Hongjuan; Luo, Xinli; Chen, Yaoning; Yuan, Yu; Yan, Haoqin] Hunan Univ, Key Lab Environm Biol & Pollut Control, Minist Educ, Changsha 410082, Peoples R China.;[Li, Yuanping; Chen, Yaoning] Hunan City Univ, Coll Municipal & Mapping Engn, Yiyang 413000, Hunan, Peoples R China.;[Li, Hui] Hunan Acad Forestry, Inst Biol & Environm Engn, State Key Lab Utilizat Woody Oil Resource, Changsha 410004, Peoples R China.
通讯机构:
[Chen, YN ; Li, YP ] H;Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Peoples R China.;Hunan City Univ, Coll Municipal & Mapping Engn, Yiyang 413000, Hunan, Peoples R China.
关键词:
*Adsorption;*Biochar;*Catalytic degradation;*Co-doping;*Heteroatoms;*Metal
摘要:
The potential risk of various contaminants in water has recently attracted public attention. Biochars and modified biochars have been widely developed for environmental remediation. Metal and heteroatom co-doped biochar composites (MHBCs) quickly caught the interest of researchers with more active sites and higher affinity for contaminants compared to single-doped biochar by metal or heteroatoms. This study provides a comprehensive review of MHBCs in wastewater decontamination. Firstly, the main fabrication methods of MHBCs were external doping and internal doping, with external doping being the most common. Secondly, the applications of MHBCs as adsorbents and catalysts in water treatment were introduced emphatically, which mainly included the removal of metals, antibiotics, dyes, pesticides, phenols, and other organic contaminants. Thirdly, the removal mechanisms of contaminants by MHBCs were deeply discussed in adsorption, oxidation and reduction, and degradation. Furthermore, the influencing factors for the removal of contaminants by MHBCs were also summarized, including the physicochemical properties of MHBCs, and environmental variables of pH and co-existing substance. Finally, futural challenges of MHBCs are proposed in the leaching toxicity of metal from MHBCs, the choice of heteroatoms on the fabrication for MHBCs, and the application in the composite system and soil remediation.
语种:
英文
展开
Comparison of the thermal comfort of pregnant women at different stages of pregnancy in a subtropical region
作者:
Peng, Ting;Fang, Wenxiang;Jiang, Xiangyang;Yang, Yanping;Fang, Zhaosong;...
期刊:
Building and Environment ,2022年219:109121 ISSN:0360-1323
通讯作者:
Fang, Zhaosong(zhaosong0102@gzhu.edu.cn);Zheng, Zhimin(gdtm2012@126.com)
作者机构:
[Fang, Zhaosong; Peng, Ting; Yang, Yanping; Zheng, Zhimin] Guangzhou Univ, Sch Civil Engn, Guangzhou 510006, Peoples R China.;[Peng, Ting] Hunan City Univ, Sch Municipal & Geomat Engn, Yiyang 413000, Peoples R China.;[Fang, Wenxiang] Guangzhou Yuexiu Women & Children Hosp, Guangzhou 510006, Peoples R China.;[Jiang, Xiangyang] Guangzhou Inst Bldg Sci Co LTD, Guangzhou 510006, Peoples R China.;[Fang, Wenxiang] Hlth Inst, Guangzhou 510006, Peoples R China.
通讯机构:
[Fang, Z.; Zheng, Z.] T;The School of Civil Engineering, Guangzhou University, Guangzhou, China
关键词:
Thermal perception;Pregnancy stages;Obstetrics waiting areas;Neutral operative temperature;Preferred temperature
摘要:
During pregnancy, owing to several physiological and psychological changes, the perception of heat by pregnant women changes, leading to them having different heat requirements. In this study, our objective was to determine the differences in the thermal perceptions of pregnant women at different stages of pregnancy (i.e., first, second, and third trimesters). Thus, we conducted an environmental parameter test on the obstetrics waiting rooms of four hospitals in Guangzhou and also administered a questionnaire survey to the waiting pregnant women. A total of 1043 questionnaires were collected during the survey (723 and 302 in summer and winter, respectively), after which the collected data was processed and statistically analyzed. Our results showed that with pregnancy development, the clothing resistance of pregnant women decreased, while their thermal sensation vote increased. Further, the mean neutral operative temperature values for the pregnant women in summer were 26.8, 25.2, and 24.1 °C, and in winter were 20.9, 19.6, and 18.9 °C during the first, second, and third trimesters, respectively. Furthermore, their preferred operative temperature values in summer were 25.8, 24.6, and 23.1 °C and in winter were 24.3, 24.0, and 22.8 °C during the first, second, and third trimesters, respectively. Thus, our results indicated that the perception of heat by pregnant women is dynamic, and increases with the development of pregnancy. These findings have guiding significance with respect to controlling the environment of the obstetrics waiting environments. © 2022 Elsevier Ltd
语种:
英文
展开
淮河中上游段干支流河道走向特征分析
作者:
李宗盟;霍兵兵;朱文敏;邢伟;张辰光;...
期刊:
信阳师范学院学报(自然科学版) ,2022年35(2):248-251 ISSN:1003-0972
作者机构:
[李宗盟; 朱文敏; 邢伟; 张辰光] 信阳师范学院地理科学学院/豫南岩矿宝玉石鉴定及加工中心;[霍兵兵] 湖北大学资源环境学院;[刘芬良] 湖南城市学院市政与测绘工程学院
关键词:
河道走向;地形特征;淮河中上游
摘要:
以淮河中上游段为研究区域,基于矢量河道数据和ArcGIS 10.2平台,对淮河两侧主要一级支流的走向特征进行了计算和分析。结果表明,淮河中上游段北侧支流的走向为南东向109°~133°,平均走向为120°;而淮河南侧支流的走向为北东向8°~50°,平均走向为28°。淮河北侧和南侧支流走向与淮河干流的夹角分别为59°、42°。通过与区域地形的对比发现,淮河两侧支流的走向与地形特征基本吻合,为较典型的顺向河。然而,淮河南侧的史河和东淝河与其他支流的走向趋势偏离较大,可能是由局地断裂活动的控制所导致的。
语种:
中文
展开
Synthesis of TiO2/g-C3N4 Hybrid Photocatalyst and its Application for Degradation of Chlorophenol as Organic Water Pollutant
作者:
Chi, Nianping;Xu, Wenzhen
期刊:
International Journal of Electrochemical Science ,2022年17(9) ISSN:1452-3981
通讯作者:
Chi, N.
作者机构:
School of Municipal and Geomatics Engineering, Hunan City University, Hunan Province Engineering &Technology Research Center for Rural Water Quality Safety, Hunan, Yiyang, 413000, China
通讯机构:
School of Municipal and Geomatics Engineering, Hunan City University, Hunan Province Engineering &Technology Research Center for Rural Water Quality Safety, Hunan, Yiyang, China
关键词:
2-chlorophenol;Industrial wastewater;Photocatalyst;Photodegradation;Tio2/g-c3n4 hybrid
摘要:
This study used a hydrothermal-calcination approach to make TiO2/g-C3N4 hybrid photocatalysts, which were then used to degrade 2-Chlorophenol (2-CP) as organic water pollutants under solar irradiation. According to XRD and SEM studies, the high porosity TiO2/g-C3N4 hybrid nanocatalyst was successfully synthesized. The band gap energies of g-C3N4, TiO2, and TiO2/g-C3N4 hybrid nanocatalysts were 2.58, 2.88, and 3.16 eV, respectively, according to optical studies. The decrease in band gap energy in TiO2/g-C3N4 hybrid toward TiO2 was evidence of facilitation in photo-excitation of charge carries using low energy, which can extend the light absorption spectrum into visible regions and holes and accelerate the transmission of the photogenerated charge carriers. Electrochemical analysis revealed that the TiO2/g-C3N4 hybrid had a lower charge transfer resistance and a longer electron life time than pure g-C3N4 and TiO2, signifying a low electron recombination rate, allowing for faster electron transport and higher photodegradation efficiency. The entire degradation of 100 ml of 25 mg/L 2-CP was obtained after 125, 110, and 65 minutes of sun irradiation, respectively, in the presence of g-C3N4, TiO2, and TiO2/g-C3N4 hybrid nanocatalysts. The practical application of a TiO2/g-C3N4 hybrid nanocatalyst to treat 2-CP in genuine industrial wastewater samples was investigated, and the results revealed the produced photocatalyst's excellent effectiveness in treating 2-CP in industrial wastewater. © 2022. The Authors. Published by ESG (www.electrochemsci.org). This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/4.0/).
语种:
英文
展开
电絮凝预处理重金属-有机物复合废水影响因素及效能研究
作者:
池年平;王译绅
期刊:
湖南城市学院学报(自然科学版) ,2022年31(4):69-73 ISSN:1672-7304
作者机构:
湖南城市学院 市政与测绘工程学院,湖南 益阳 413000;[王译绅] 湖南城市学院 湖南省村镇饮用水水质安全保障工程技术研究中心,湖南 益阳 413000;[池年平] 湖南城市学院
关键词:
电絮凝;重金属;有机物;复合废水;预处理
摘要:
研究分析了电絮凝作为生物法处理重金属-有机物复合废水的前置工艺的可行性,并采用模拟配水,以Cu2+、Zn2+、Pb2+、Cd2+和COD为去除对象,探究电絮凝对复合废水中重金属去除效率的影响因素及其对COD的去除效果﹒结果表明:水体pH值、电流密度和电絮凝时间是影响絮凝效果的重要因素;当pH值为6~7、电流密度为1.5 A/dm~2和电絮凝时间为15 min时,复合废水中重金属的去除效率较高,可有效减少其对后续生物处理工段的毒性抑制;当pH值为6、电流密度为1.5 A/dm~2和电絮凝时间为15 min时,COD去除效率达34.50%,预处理效果明显﹒
语种:
中文
展开
长沙地区某居住建筑供暖空调能耗调研与实测
作者:
段姣姣;张新桥;吴兴应;崔洪源
期刊:
湖南城市学院学报(自然科学版) ,2022年31(01):43-48 ISSN:1672-7304
作者机构:
[崔洪源; 吴兴应; 张新桥; 段姣姣] 湖南城市学院 市政与测绘工程学院,湖南 益阳 413000
关键词:
长沙;居住建筑;在室率;空调运行模式;热舒适性;能耗
摘要:
居住建筑供暖空调能耗是建筑耗能的重要组成部分.本文选取长沙某新建小区进行问卷调查和典型住户入室监测,获得85份有效问卷和1 a实测数据.通过统计住户在室情况和空调运行模式数据,分析了室内热舒适性,并计算了全年供暖空调能耗.研究结果表明:住户在室情况主要分2大类;不同房间、不同工况下空调运行模式完全不一样;卧室空调驱动因素一般以环境为主,客厅则以事件为主;制冷期空调开启率明显大于供暖期,热舒适性明显优于供暖期;不同住户供暖空调能耗不同,且与在室率、建筑面积等为非简单线性关系.
语种:
中文
展开
Petrogenesis and tectonic implications of Late Triassic granitoids in the Alananshan, East Kunlun belt: evidence from geochemistry, geochronology, and zircon Hf isotopic compositions
作者:
Zhen Xi;Huan Li;Safiyanu Muhammad Elatikpo;Guangming Gao;Decheng Ma
期刊:
地球化学学报(英文) ,2022年41(6):947-967 ISSN:2096-0956
通讯作者:
Li, Huan(lihuan@csu.edu.cn)
作者机构:
[Zhen Xi] School of Municipal and Geomatics Engineering, Hunan City University, Yiyang;413000, China;[Huan Li; Safiyanu Muhammad Elatikpo; Guangming Gao] School of Geosciences and Info-Physics, Central South University, Changsha;410083, China;Department of Geology, Ahmadu Bello University, Zaria, Nigeria
通讯机构:
[Huan Li] S;School of Geosciences and Info-Physics, Central South University, Changsha, China
关键词:
I-type granite;Petrogeochemistry;Triassic magmatic rocks;Hf isotope;East Kunlun orogenic belt
摘要:
The Qimantag in the East Kunlun Orogenic Belt has widespread Triassic magmatic rocks that have received scant attention, with an unresolved issue relating to its petrogenesis and geodynamics. In this paper, we used zircon U–Pb–Hf isotopes and whole-rock geochemistry to trace the petrogenesis and tectonic settings of the moyite and monzogranite from the Qimantag Alananshan, East Kunlun. The moyite and monzogranite are silicic (SiO2 ~ 69.9–76.41%), highly alkali (Na2O + K2O ~ 7.29 to 8.96wt.%), with Mg# about 10.4–30.34, indicative of a high-K calc-alkaline rock series. The rare earth element patterns diagram is right-leaning, with a negative Eu anomaly (δEu = 0.31–0.68). They are enriched in Rb, K, and light rare earth elements but depleted in Nb, Ta, and Ti, with abundant amphibole, typical of I-type granites. U–Pb on zircon constrained the emplacement of the moyite at 223.9 ± 2.6Ma and monzogranite at 226.9 ± 2.9Ma. The ΕHf(t) values range from − 2.8 to + 0.1 except for one outlier value of − 7.0, corresponding two-stage model age of 1249–1437Ma. Our combined geochemical and isotopic results indicate that the moyite and monzogranite were derived from partial melting of the lower thicken crust with the contribution from the older basement materials. These rocks formed in a post-collision setting that is transitional between compressive collision and extension orogeny. © 2022, The Author(s), under exclusive licence to Science Press and Institute of Geochemistry, CAS and Springer-Verlag GmbH Germany, part of Springer Nature.
语种:
英文
展开
Study on occupant behaviour using air conditioning of high-rise residential buildings in hot summer and cold winter zone in China
作者:
Duan, Jiaojiao;Li, Nianping;Peng, Jinqing;Wang, Chenhua;Liu, Qingqing;...
期刊:
Energy and Buildings ,2022年276:112498 ISSN:0378-7788
通讯作者:
Li, Nianping(linianping@hnu.edu.cn)
作者机构:
[Li, Nianping; Peng, Jinqing; Liu, Qingqing; Duan, Jiaojiao] Hunan Univ, Coll Civil Engn, Changsha 410082, Hunan, Peoples R China.;[Zhou, Xuehua; Duan, Jiaojiao] Hunan City Univ, Sch Municipal & Geomat Engn, Yiyang 413099, Peoples R China.;[Li, Nianping; Peng, Jinqing; Liu, Qingqing; Duan, Jiaojiao] Hunan Univ, Key Lab Bldg Safety & Energy Efficiency, Minist Educ, Changsha, Peoples R China.;[Zhou, Xuehua] Natl & Local Joint Engn Res Ctr Airborne Pollutant, Hengyang 421001, Peoples R China.
通讯机构:
[Nianping Li] C;College of Civil Engineering, Hunan University, Changsha, Hunan 410082, China<&wdkj&>Key Laboratory of Building Safety and Energy Efficiency (Hunan University), Ministry of Education, China
关键词:
Air conditioning (AC);High-rise residential building;Occupant behaviour;Start-up temperature;Start–stop time;Statistical analysis
摘要:
Over the past two decades, the electricity consumption of residential air conditioning (AC) has increased by 13.4 times. Moreover, carbon emissions from building operations remain high. Occupant behaviour related to AC operation is the most significant factor affecting the energy consumption of residential ACs. Hence, in this study, occupant behaviour towards using air conditioning in high-rise residential buildings was analysed to provide suggestions for increasing the AC usage efficiency. Annual data on the AC power consumption, indoor temperature, and humidity of typical high-rise residential buildings in hot summer and cold winter zones in China were collected. Five target parameters—AC opening rate, AC standby rate, start–stop time, start–stop temperature, and stable temperature—were statistically analysed. The results reveal that the AC start–stop time follows a normal distribution. The start and stop times of the AC during the cooling period are 22:32 and 7:05 the next day, respectively, whereas during the heating periods these values were 20:42 and 23:02 or 7:56 the next day, respectively. The standard deviation of the time distribution of AC starting or stopping at night is larger than that during the day. The AC start-up temperature followed an exponential distribution. The indoor temperature during the cooling and heating periods is more than 29.42 °C and less than 11.08 °C, respectively. The opening rate of the room AC is 80 %. © 2022 Elsevier B.V.
语种:
英文
展开
Full-response model of transient heat transfer of building walls using thermoelectric analogy method
作者:
Duan, Jiaojiao;Li, Nianping;Peng, Jinqing;Wang, Chenhua;Liu, Qingqing
期刊:
Journal of Building Engineering ,2022年46 ISSN:2352-7102
通讯作者:
Li, NP
作者机构:
[Li, Nianping; Peng, Jinqing; Liu, Qingqing; Duan, Jiaojiao; Li, NP] Hunan Univ, Coll Civil Engn, Changsha 410082, Hunan, Peoples R China.;[Duan, Jiaojiao] Hunan City Univ, Sch Municipal & Geomat Engn, Yiyang 413099, Peoples R China.;[Li, Nianping; Peng, Jinqing; Liu, Qingqing; Duan, Jiaojiao] Hunan Univ, Key Lab Bldg Safety & Energy Efficiency, Minist Educ, Changsha, Peoples R China.;[Wang, Chenhua] Natl & Local Joint Engn Res Ctr Airborne Pollutan, Hengyang 421001, Peoples R China.
通讯机构:
[Li, NP ] H;Hunan Univ, Coll Civil Engn, Changsha 410082, Hunan, Peoples R China.
关键词:
Full-response model;Heat transfer;RC network;Thermoelectric analogy;Transient analysis
摘要:
The modeling calculation of heat transfer based on a resistance and capacitance network in building systems is relatively complex. In this study, a full-response model of the thermal circuit transient analysis of wall heat transfer was established based on the thermoelectric analogy mechanism and the transient analysis principle of circuits. The full-response model of wall heat transfer was validated through comparison with experimental results. From the seventh day, the temperatures of the middle and inner surfaces of the wall exhibited significant attenuation and lag compared to the outer surface temperature of the wall. In the same structure and direction, the lag times of the temperatures of inner and outer surfaces of the south walls of the bedroom and study room were 3 h and 9h30min, and the decay temperatures were 5.5 °C and 5.3 °C, respectively. The proposed model improves the adaptability of the thermoelectric analogy resistance and capacitance (RC) network model and shortens the calculation time, providing a theoretical basis for research on multisystem heat transfer. © 2021 Elsevier Ltd
语种:
英文
展开
湖南益阳地区农村住宅室内热环境调查分析
作者:
郭华;吴兴应;裴霞;陈雨蕾;李诗青
期刊:
四川建材 ,2022年48(05):250-251 ISSN:1672-4011
作者机构:
湖南城市学院市政与测绘工程学院
关键词:
湖南地区;室内热环境;热舒适;热感觉
摘要:
对湖南益阳地区农村的一些典型住宅建筑的热环境进行了调查,热舒适投票TCV结果显示有21.2%的家庭住户对室内环境感觉舒适。通过对热感觉投票值进行直线拟合,得到中性温度值为20.4℃,益阳地区湿度较大使得大部分人希望通过更低一点的温度来达到热舒适状态。在夏季和冬季进行典型住宅的温度测量表明,围护结构良好的保温隔热性能是保持房间冬暖夏凉的重要因素。
语种:
中文
展开
Long Time-Series Urban Heat Island Monitoring and Driving Factors Analysis Using Remote Sensing and Geodetector
作者:
Xiong, Liwei;Li, Shenxin;Zou, Bin;Peng, Fen;Fang, Xin;...
期刊:
Frontiers in Environmental Science ,2022年9:828230 ISSN:2296-665X
通讯作者:
Li, SX
作者机构:
[Fang, Xin; Xue, Yun; Xiong, Liwei] Hunan City Univ, Sch Municipal & Surveying Engn, Yiyang, Peoples R China.;[Li, Shenxin; Zou, Bin; Xiong, Liwei; Li, SX] Cent South Univ, Sch Geosci & Infophys, Key Lab Nonferrous Met Metallogen Predict & Geol, Minist Educ, Changsha, Peoples R China.;[Li, Shenxin; Zou, Bin; Li, SX] Cent South Univ, Sch Geosci & Infophys, Changsha, Peoples R China.;[Peng, Fen] Changsha Univ Sci & Technol, Sch Architecture, Changsha, Peoples R China.
通讯机构:
[Li, SX ] C;Cent South Univ, Sch Geosci & Infophys, Key Lab Nonferrous Met Metallogen Predict & Geol, Minist Educ, Changsha, Peoples R China.;Cent South Univ, Sch Geosci & Infophys, Changsha, Peoples R China.
关键词:
Urban heal island;Long time series analysis;urban landscape;Correlation analysis;sustainable development
摘要:
Urban heat island (UHI) effect decribes significant change due to rapid urbanization development. This study focused on the long time series analysis of UHI during the period 2000-2018, and analyzed the impact of land cover type and landscape metric factors on surface temperature. The results revealed that the UHI had a continuously decreasing trend in 2005–2010, and an increasing trend in 2000–2005 and 2010–2018. Cropland, built-up land, patch density (PD), Shannon Diversity Index (SHDI), and Landscape Shape Index (LSI) had a positive relationship with UHI, whereas forestland, open water, and CONTAG had a negative correlation with the UHI effect. The Geodetector analysis further revealed that PD, SHDI, and LSI had the greatest influences on LST as the three factors had the largest q values (0.287, 0.286, and 0.278). Forestland, cropland, and built-up land had greater impacts on the UHI than other land cover type factors. The explanatory power reached a maximum value of 0.408 when built-up land and cropland variables interacted. The findings of this study provide new understandings of the relationship between urban landscape and UHI, as well as important insights for urban planners to mitigate the UHI effect for the sustainable development of future urban agglomeration. Copyright © 2022 Xiong, Li, Zou, Peng, Fang and Xue.
语种:
英文
展开
基于AHP的夏热冬冷地区居住建筑空调能耗评价体系构建与应用研究
作者:
段姣姣;向夏楠;王晨光;王盛;詹俏;...
期刊:
湖南城市学院学报(自然科学版) ,2022年31(5):62-66 ISSN:1672-7304
作者机构:
湖南城市学院 市政与测绘工程学院,湖南 益阳 413000;[杨亚夫; 王盛; 段姣姣; 王晨光; 向夏楠; 詹俏] 湖南城市学院
关键词:
居住建筑;空调能耗;围护结构;居住者行为;层次分析法;评价体系
摘要:
基于国家“双碳”目标,居住建筑作为能耗大户,其减排节能显得非常重要。建筑能耗评价是决定其节能效果的重要依据,主要包括评价指标体系的构建和评价方法的研究。本文通过广泛地调查研究与文献采集,选取了“纵四横五”的评价指标体系和层次分析法(AHP),建立了评价体系的数学模型,并利用该模型对夏热冬冷地区某居住建筑的空调能耗进行评价。结果表明:每日空调启闭时间、开启温度和围护结构参数是该居住建筑空调能耗权重最大的影响因素,分别为19.48%、12.30%和11.59%。
语种:
中文
展开
改性牡蛎壳粉优化制备及其对草甘膦的吸附性能
作者:
张伟;梁哲;汪爱河;舒金锴;胡孟源
期刊:
工业水处理 ,2022年42(3):90-97 ISSN:1005-829X
作者机构:
[汪爱河; 舒金锴; 张伟] 湖南城市学院市政与测绘工程学院,湖南益阳 413000;[汪爱河; 舒金锴; 张伟] 湖南省村镇饮用水水质安全保障工程技术研究中心,湖南益阳 413000;沈阳建筑大学市政与环境工程学院,辽宁沈阳 110168;[胡孟源] 湖南城市学院;[梁哲] 沈阳建筑大学
关键词:
牡蛎壳粉;改性;优化制备;草甘膦;吸附
摘要:
草甘膦是造成水体富营养化的典型有机磷。通过高温掺杂合成改性牡蛎壳粉,对模拟草甘膦废水进行吸附研究。结果表明,改性牡蛎壳粉最优制备条件为:煅烧温度900 ℃、过筛粒径120目(125μm)、淀粉用量(淀粉质量/牡蛎壳粉质量)15%、煅烧时间为2.5 h,并进行碱处理。XRD表明优化制备后的改性牡蛎粉表面成分为CaCO3和Ca(OH)2,表面分析结果表明改性牡蛎壳粉比表面积增大21.3%,红外光谱分析表明优化制备后的改性牡蛎壳粉出现羟基。改性牡蛎壳粉吸附草甘膦过程符合准二级动力学模型和Langmuir模型,最大吸附量为66.06 mg/g。以上研究结果可为有机磷废水处理提供参考。
语种:
中文
展开
Preparation of amphiphilic cationic polyacrylamide (CPAM) with cationic microblock structure to enhance printing and dyeing sludge dewatering and condition performance
作者:
Chi, Nianping;Liu, Jiajun;Lei, Minghua;Feng, Li
期刊:
Environmental Science and Pollution Research ,2022年30(5):13079-13093 ISSN:0944-1344
通讯作者:
Li Feng
作者机构:
[Chi, Nianping] Hunan City Univ, Hunan Prov Engn & Technol Res Ctr Rural Water Qua, Sch Municipal & Geomat Engn, Yiyang 413000, Hunan, Peoples R China.;[Lei, Minghua; Feng, Li; Liu, Jiajun] Guangdong Univ Technol, Guangzhou Higher Educ Mega Ctr, Sch Civil & Transportat Engn, 100 Waihuan Xi Rd, Guangzhou 510006, Guangdong, Peoples R China.
通讯机构:
[Feng, Li] S;School of Civil and Transportation Engineering, Guangdong University of Technology, No100, Waihuan Xi Road, Guangzhou, Higher Education Mega Center, Panyu District, Guangzhou, 510006, Guangdong, People's Republic of China.
关键词:
Cationic polyacrylamide;Template polymerization;Microblock structure;Sludge dewatering;Hydrophobic flocculant
摘要:
Flocculation is an important pretreatment technology for sludge dewatering, and the flocculant’s performance is the key factor to determine the flocculation effect. Cationic polyacrylamide (CPAM) is commonly used in dewatering and conditioning of printing and dyeing sludge (PD sludge), and the research of high-efficiency flocculant is a hot spot in the field of PD sludge dewatering. Hydrophobic butylacrylate (BA) and (2-(Methacryloyloxy)ethyl) trimethylammonium chloride (DMC) were introduced into the copolymer, and amphiphilic (hydrophilic/lipophilic) CPAM, namely TP-ADB, with microblock structure was synthesized by ultrasonic initiated template copolymerization in this study. The functional group composition of TP-ADB was determined by FTIR and 1H NMR. Thermogravimetric analysis (TGA) showed that TP-ADB had good thermal stability. The amphiphilic rheological properties of the copolymer were measured according to the apparent viscosity. In addition, 1H NMR and TGA results confirmed the existence of microblock structure in the copolymer chain. The polymerization mechanism was discussed by association coefficient (KM) measurement. The results showed that the template copolymerization initiated by ultrasonic followed the law of free radical copolymerization. The pre-adsorption of DMC with sodium polyacrylate template (NaPAA) before the reaction confirmed that the template polymerization accorded with ZIP I mechanism. The cationic microblock structure and hydrophobic association of TP-ADB promoted the dewatering performance of PD sludge (FCMC = 72.9%, turbidity removal rate = 98.9%, SRF = 4.2 × 1012m·kg−1). Hydrophobic association enhanced the bridging, sweeping, and net catching effect, and promoted the growth of floc size and fractal dimension. Cationic microblock structure can produce compact floc with higher mechanical strength by enhancing electrical neutralization and electrical patching. As a skeleton, the compressibility of filter cake was reduced and the permeability was enhanced, and the PD sludge dewatering effect was significantly improved. Graphical abstract: [Figure not available: see fulltext.] © 2022, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.
语种:
英文
展开
Modification of sludge biochar by MnO2 to degrade methylene blue: Synergistic catalysis and degradation mechanisms
作者:
Li, Yuanping;Liu, Yuqing;Liu, Yihuan;Chen, Yaoning;Chen, Li;...
期刊:
Journal of Water Process Engineering ,2022年48:102864 ISSN:2214-7144
通讯作者:
Chen, Y.
作者机构:
[Li, Yuanping] Hunan City Univ, Coll Municipal & Mapping Engn, Yiyang 413000, Hunan, Peoples R China.;[Li, Linshenzhang; Liu, Yuqing; Li, Meiling; Xu, Fangting] Dongtian Engn Consulting Co Ltd, Changsha 410205, Hunan, Peoples R China.;[Li, Linshenzhang; Chen, Yaoning; Li, Meiling; Liu, Yihuan; Xu, Fangting; Yan, Haoqin; Chen, Li] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Peoples R China.;[Chen, Yaoning; Liu, Yihuan; Yan, Haoqin; Chen, Li] Hunan Univ, Key Lab Environm Biol & Pollut Control, Minist Educ, Changsha 410082, Peoples R China.;[Chen, Yanrong] Hunan Univ Technol & Business, Sch Resource & Environm, Changsha 410205, Peoples R China.
通讯机构:
College of Environmental Science and Engineering, Hunan University, Changsha, China
关键词:
Sludge biochar;Manganese dioxide;AOPs;Peroxymonosulfate;Methylene blue
摘要:
In this study, sludge biochar (SBC) was prepared by pyrolysis method, MnO2 and MnO2@SBCs with different MnO2/SBC mass ratios (3%, 5%, 10% and 20%) were synthesized by co-precipitation method. The catalytic performance was examined by activating peroxymonosulfate (PMS) for methylene blue (MB) degradation. MB can be completely removed within 30 min when the mass ratio of MnO2/SBC is greater than 5% and the degradation kinetics of MB is more in line with the pseudo-first-order kinetic model in the MnO2@SBC/PMS system. Besides, the pseudo-first-order kinetic constants (k) in MnO2@SBC/PMS are significantly higher than that in SBC/PMS and MnO2/PMS, and the largest degradation rate of MB is in 5% MnO2@SBC/PMS system. MnO2@SBC exhibited excellent PMS activation ability in a wide range of pH (5–9) with complete degradation of MB in 30 min. Furthermore, MnO2@SBC has good stability after five usages still activating PMS for complete degradation of MB in 180 min. The quenching experiments and EPR spectrum indicated that both SO4[rad]−, [rad]OH and 1O2 were the main reactive oxygen species. Finally, the probable MB degradation pathway was proposed in the MnO2/PMS system. This study provides a reliable insight into sludge resource utilization, sludge biochar modification and its catalytic performance improvement. © 2022 Elsevier Ltd
语种:
英文
展开