作者： Wang, Xiaohua;Liu, Ni*;Liu, Yunguo*;Jiang, Luhua;Zeng, Guangming;Tan, Xiaofei;Liu, Shaobo;Yin, Zhihong;Tian, Sirong;Li, Jiang

期刊： INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH,2017年14(10) ISSN：1660-4601

通讯作者： Liu, Ni;Liu, Yunguo

作者机构： [Yin, Zhihong; Liu, Yunguo; Jiang, Luhua; Zeng, Guangming; Wang, Xiaohua; Tan, Xiaofei; Li, Jiang; Liu, Ni; Liu, N; Tian, Sirong] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.;[Yin, Zhihong; Liu, Yunguo; Jiang, Luhua; Zeng, Guangming; Wang, Xiaohua; Tan, Xiaofei; Li, Jiang; Liu, Ni; Liu, N; Tian, Sirong] Hunan Univ, Key Lab Environm Biol & Pollut Control, Minist Educ, Changsha 410082, Hunan, Peoples R China.;[Wang, Xiaohua] Hunan City Univ, Sch Architecture & Urban Planning, Yiyang 413099, Peoples R China.;[Liu, Shaobo] Cent S Univ, Sch Architecture & Art, Changsha 410082, Hunan, Peoples R China.;[Liu, Shaobo] Cent S Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R China.

通讯机构： [Liu, N; Liu, YG] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.;[Liu, N; Liu, YG] Hunan Univ, Key Lab Environm Biol & Pollut Control, Minist Educ, Changsha 410082, Hunan, Peoples R China.

关键词： *17beta-estradiol;*adsorption;*endocrine disrupting chemicals;*pyrolysis temperature;*rice straw biochar

摘要： Rice straw biochar that produced at three pyrolysis temperatures (400, 500 and 600 degrees C) were used to investigate the adsorption properties of 17beta-estradiol (E2). The biochar samples were characterized by scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), elemental analysis and BET surface area measurements. The influences of pyrolysis temperature, E2 concentration, pH, ionic strength, background electrolyte and humic acid were studied. Kinetic and isotherm results illustrated that the adsorption process could be well described by pseudo-second-order and Freundlich models. Experimental results showed that ionic strength had less influence on the adsorption of E2 by 500 and 600 degrees C rice straw biochar. Further, multivalent ions had positive impact on E2 removal than monovalent ions and the influence of the pyrolysis temperature was unremarkable when background electrolyte existed in solutions. The adsorption capacity of E2 decreased with the pH ranged from 3.0 to 12.0 and the humic acid concentration from 2 to 10 mg L(-1). Electrostatic attractions and pi-pi interaction were involved in the adsorption mechanisms. Compared to low-temperature biochar, high-temperature biochar exhibited a better adsorption capacity for E2 in aqueous solution, indicated it had a greater potential for E2 pollution control.

语种： 英文

作者： Ning, Qimeng;Yin, Zhihong*;Liu, Yunguo;Tan, Xiaofei;Zeng, Guangming;Jiang, Luhua;Liu, Shaobo;Tian, Sirong;Liu, Ni;Wang, Xiaohua

期刊： INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH,2018年15(10) ISSN：1660-4601

通讯作者： Yin, Zhihong

作者机构： [Yin, Zhihong; Ning, Qimeng; Liu, Yunguo; Zeng, Guangming; Jiang, Luhua; Tan, Xiaofei; Wang, Xiaohua; Liu, Ni; Tian, Sirong] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.;[Yin, Zhihong; Ning, Qimeng; Liu, Yunguo; Zeng, Guangming; Jiang, Luhua; Tan, Xiaofei; Wang, Xiaohua; Liu, Ni; Tian, Sirong] Hunan Univ, Minist Educ, Key Lab Environm Biol & Pollut Control, Changsha 410082, Hunan, Peoples R China.;[Ning, Qimeng; Wang, Xiaohua] Hunan City Univ, Sch Architecture & Urban Planning, Yiyang 413000, Peoples R China.;[Liu, Shaobo] Cent S Univ, Sch Architecture & Art, Changsha 410082, Hunan, Peoples R China.;[Liu, Shaobo] Cent S Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R China.

通讯机构： [Yin, Zhihong] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.;[Yin, Zhihong] Hunan Univ, Minist Educ, Key Lab Environm Biol & Pollut Control, Changsha 410082, Hunan, Peoples R China.

关键词： stabilized Fe-Mn binary oxide nanoparticles;oxidation;17 beta-estradiol;adsorption

摘要： Fe–Mn binary oxide nanoparticles (FMBON) were reported to be high performance as adsorbent for pollutants removal from aqueous solution. However, there are still limitations in practice application due to the FMBON tend to aggregate into the micro millimeter level. In order to avoid the agglomeration of nanoparticles, this work synthesized the stabilized Fe–Mn binary oxide nanoparticles (CMC-FMBON) by using water-soluble carboxymethyl celluloses (CMC) as the stabilizer. The characteristics of CMC-FMBON and FMBON were measured by using Transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, and Zeta potential. This work systematically investigated the adsorption capacity of CMC-FMBON for 17β-estradiol (E2) and the influences of external environmental factors on E2 removal. The results indicated that CMC-FMBON had much smaller particles, wider dispersion and larger surface area than the FMBON. CMC-FMBON showed better adsorption performance for E2 than FMBON with the maximum adsorption capacity of CMC-FMBON and FMBON were 124.10 and 98.14 mg/g at 298 K, respectively. The experimental data can be well fitted by the model of pseudo-second-order and Langmuir model. The E2 removal by CMC-FMBON was obviously dependent on pH with the maximum adsorption occurring when the pH was acidic. The removal capacity of CMC-FMBON increased when enhancing ionic strength in solution. Background electrolytes promoted slightly E2 adsorption process whereas the presence of humic acid inhibited the E2 removal. π-π interactions, hydrogen bonds, and oxidation might be responsible for E2 removal. This research suggested that the CMC-FMBON has been considered to be a cost-efficient adsorbent for removing E2 from water. © 2018 by the authors. Licensee MDPI, Basel, Switzerland.

语种： 英文

作者： Tang, Yuanqiang;Liu, Yunguo*;Zhang, Tao;Li, Jiang;Wang, Xiaohua;Zhang, Wei;Zeng, Guangming*;Liu, Shaobo;Guan, Lei

期刊： International Journal of Environmental Research and Public Health,2019年16(11):1965- ISSN：1660-4601

通讯作者： Liu, Yunguo;Zeng, Guangming

作者机构： [Liu, Yunguo; Zeng, Guangming; Zeng, GM; Wang, Xiaohua; Tang, Yuanqiang; Zhang, Wei] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.;[Liu, Yunguo; Zeng, Guangming; Zeng, GM; Wang, Xiaohua; Tang, Yuanqiang; Zhang, Wei] Hunan Univ, Minist Educ, Key Lab Environm Biol & Pollut Control, Changsha 410082, Hunan, Peoples R China.;[Zhang, Tao] Meijiang Cty Aquat Technol Promot Stn, Meizhou 514000, Peoples R China.;[Liu, Shaobo; Li, Jiang] Cent S Univ, Sch Architecture & Art, Changsha 410082, Hunan, Peoples R China.;[Wang, Xiaohua] Hunan City Univ, Sch Architecture & Urban Planning, Yiyang 413000, Peoples R China.

通讯机构： [Liu, YG; Zeng, GM] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.;[Liu, YG; Zeng, GM] Hunan Univ, Minist Educ, Key Lab Environm Biol & Pollut Control, Changsha 410082, Hunan, Peoples R China.

关键词： Anguilla japonica;acute toxic effects;mercury;safety concentration

摘要： The acute toxicity of divalent mercury ion to Anguilla japonica from seawater and freshwater aquaculture was assessed. In particular, the effects of toxicity on the microstructures of the gill and liver tissues were examined using the hydrostatic method, without feeding, at a water temperature of 20 °C. The median lethal concentrations (LC50) of divalent mercury ion to fishes in seawater and freshwater over various durations were: 24 h = 1.637 and 1.428 mg/L; 48 h = 1.562 and 1.377 mg/L; 72 h = 1.530 and 1.284 mg/L; and 96 h = 1.442 and 1.228 mg/L. The safety mass concentrations were 0.1442 and 0.01228 mg/L, respectively. After exposure to divalent mercury ion, adhesion between the gill lamellae and massive cellular disintegration and necrotic shedding were observed in the gill tissue sections. The liver tissues underwent hyperemia and swelling, with the appearance of blood spots, swelling of the hepatocyte mitochondria, dilation of the rough endoplasmic reticulum, and intercellular inflation. © 2019 by the author. Licensee MDPI, Basel, Switzerland.

语种： 英文

作者： Zhang, Honghui*;Zeng, Yongnian;Jin, Xiaobin;Shu, Bangrong;Zhou, Yinkang;Yang, Xuhong

期刊： Ecological Modelling,2016年320:334-347 ISSN：0304-3800

通讯作者： Zhang, Honghui

作者机构： [Zhou, Yinkang; Zhang, Honghui; Yang, Xuhong; Jin, Xiaobin] Nanjing Univ, Sch Geog & Oceanog Sci, Nanjing 210093, Jiangsu, Peoples R China.;[Zhang, Honghui] Changsha Planning Informat Ctr, Changsha 410013, Hunan, Peoples R China.;[Zhang, Honghui] Hunan City Univ, Sch Architecture & Urban Planning, Yiyang 413002, Hunan, Peoples R China.;[Zeng, Yongnian] Cent S Univ, Sch Geosci & Geomat, Changsha 410083, Peoples R China.;[Shu, Bangrong] Jiangsu Normal Univ, Sch Geodesy & Geomat, Dept Land Resources, Xuzhou 221116, Jiangsu, Peoples R China.

通讯机构： [Zhang, Honghui] Nanjing Univ, Sch Geog & Oceanog Sci, Nanjing 210093, Jiangsu, Peoples R China.

关键词： Land use allocation;Multi-objective optimization;Multi-agent system;Sustainable land use;China

摘要： Achieving multi-objective land use optimization allocation (MOLUOA) for sustainable development is an important issue in land use. In consideration of the multi-dimensional characteristics of MOLUOA in terms of quantity, space, and time, and under the constraints of maximizing economic, ecological, and social benefits of land use, a MOLUOA model is developed in this study by integrating multi-agent system with particle swarm optimization. The MOLUOA model is applied to the simulation of land use optimization allocation in Changsha, a typical city located in central China. Simulation results show that the MOLUOA model can achieve multi-objective land use optimization allocation in terms of quantity, space, and time. The model can provide decision-making support for generating land use alternatives to achieve sustainable land use. (C) 2015 Elsevier B.V. All rights reserved.

语种： 英文

作者： SUN Qian;TANG Fanghua;TANG Yong

期刊： Journal of Geographical Sciences,2015年25(6):739-755 ISSN：1009-637X

通讯作者： Tang Fanghua

作者机构： [SUN Qian] Cent S Univ, Sch Business, Changsha 410086, Hunan, Peoples R China.;[SUN Qian] Hunan City Univ, Sch Business, Yiyang 413000, Hunan, Peoples R China.;[TANG Fanghua] Hunan City Univ, Sch Architecture & City Planning, Yiyang 413000, Hunan, Peoples R China.;[TANG Yong] Hunan City Univ, Sch Urban Management, Yiyang 413000, Hunan, Peoples R China.

通讯机构： [Tang Fanghua] Hunan City Univ, Sch Architecture & City Planning, Yiyang 413000, Hunan, Peoples R China.

关键词： urban agglomeration;the middle reaches of Changjiang River;economic network;gravitation model;social network analysis

摘要： Due to its great strategic significance in integrating regional coordinated development and enhancing the rise of Central China, urban agglomeration in the middle reaches of Changjiang (Yangtze) River has attracted much attention from both theoretical and practical aspects. Such research into the area’s economic network structure is beneficial for the formation of an urban- and regional-development strategy. This paper constructs an economic tie model based on a modified gravitation model. Subsequently, referring to social network analysis, the paper empirically studies the network density, network centrality, subgroups and structural holes of the middle reaches of Changjiang River’s urban agglomeration economic network. The findings are fourfold: (1) an economic network of urban agglomeration in the middle reaches of Changjiang River has been formed, and economic ties between the cities in this network are comparatively dense; (2) the urban agglomeration in the middle reaches of Changjiang River can be divided into four significant subgroups, with each subgroup having its own obvious economic communications, while there is less economic-behavioral heterogeneity among subgroups — this is especially true for the two subgroups that exist in the Poyang Lake Ecological Economic Zone; (3) an economy pattern driven by the central cities of Wuhan, Changsha and Nanchang has emerged in the urban agglomeration of the middle reaches of Changjiang River, while these three capital cities have exerted great radiation abilities to their surrounding cities, the latter are less able to absorb resources from the former; (4) the Wuhan Metropolitan Areas and the Poyang Lake Ecological Economic Zone have more structural holes than the Ring of Changsha, Zhuzhou and the Xiangtan City Clusters, meaning that cities at the periphery of these two areas are easily constrained by central cities. The Ring of Changsha, Zhuzhou and the Xiangtan City Clusters have fewer structural holes; thus, the cities in this area will not face as many constraints as those in the other two areas. © 2015, Science in China Press and Springer-Verlag Berlin Heidelberg.

语种： 英文

作者： Zeng, Zhi-wei;Tian, Si-rong*;Liu, Yun-guo*;Tan, Xiao-fei;Zeng, Guang-ming;Jiang, Lu-hua;Yin, Zhi-hong;Liu, Ni;Liu, Shao-bo;Li, Jiang

期刊： Journal of Chemical Technology & Biotechnology,2018年93(4):1075-1084 ISSN：1097-4660

通讯作者： Tian, Si-rong;Liu, Yun-guo

作者机构： [Yin, Zhi-hong; Jiang, Lu-hua; Liu, Yun-guo; Zeng, Zhi-wei; Li, Jiang; Tian, Si-rong; Tan, Xiao-fei; Liu, Ni; Zeng, Guang-ming] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.;[Yin, Zhi-hong; Jiang, Lu-hua; Liu, Yun-guo; Zeng, Zhi-wei; Li, Jiang; Tian, Si-rong; Tan, Xiao-fei; Liu, Ni; Zeng, Guang-ming] Hunan Univ, Minist Educ, Key Lab Environm Biol & Pollut Control, Changsha, Hunan, Peoples R China.;[Zeng, Zhi-wei] Hunan City Univ, Sch Architecture & Urban Planning, Yiyang, Peoples R China.;[Liu, Shao-bo] Cent S Univ, Sch Met & Environm, Changsha, Hunan, Peoples R China.;[Liu, Shao-bo] Cent South Univ Forestry & Technol, Coll Environm Sci & Engn Res, Changsha, Hunan, Peoples R China.

通讯机构： [Tian, SR; Liu, YG] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.

关键词： adsorption;char;scanning electron microscopy (SEM);removal;pollution control

摘要： Antibiotics are widely used for the treatment of bacterial infections in humans and animals, but it can be released into water sources due to incomplete metabolism in humans or via discharge from drug manufacturers. The efficiency of removal of three antibiotics was enhanced with increasing biochar dosage. The adsorption of three antibiotics by RH700 was much higher than by RH300 and RH500, which might be due to the larger surface area and adsorption pore volume of RH700 (211.76 m2 g‐1 and 6.25 nm, respectively). In addition, the adsorption capacity was greatly affected by the solution pH, background electrolyte and humic acid. The kinetics experiment data were well fitted by the pseudo‐second‐order kinetic model. The maximum adsorption capacities of tetracycline hydrochloride (TC), doxycycline hydrochloride (DC) and ciprofloxacin (CF) based on the Langmuir model by RH700 at 318 K were 80.9, 85.2 and 36.1 mg g‐1, respectively. RH700 exhibited high affinity for antibiotics, mainly ascribed to the chemical interaction between oxygen‐containing functional groups (phenolic hydroxyl group, carboxyl and alkoxy groups) of the biochar surface and TC, DC and CF. The rice husk biochar produced at high temperature could be applied as a potential adsorbent for removal of antibiotics from water. © 2017 Society of Chemical Industry

语种： 英文

作者： Jie, Yu;Tong, Wen

作者机构： [Jie, Yu] Hunan City Univ, Sch Civil Engn, Yiyang 413000, Peoples R China.;[Tong, Wen] Hunan City Univ, Sch Architecture & Planning, Yiyang 413000, Peoples R China.

会议名称： 2nd International Conference on Civil, Architectural and Hydraulic Engineering, ICCAHE 2013

会议时间： July 27, 2013 - July 28, 2013

会议地点： Zhuhai, China

会议主办单位： (1) School of Civil Engineering, Hunan City University, Yiyang, 413000, China; (2) School of Architecture and Planning, Hunan City University, Yiyang, Hunan, 413000, China

会议论文集名称： Applied Mechanics and Materials

关键词： Application examples - Comprehensive evaluation - Evaluation index system - Evaluation results - Group decision - Matter-element model - Public transportation - Satisfaction degrees

摘要： The group eigenvalue method and extension set theory were used to assess the comprehensive evaluation of the satisfaction degree for the public transportion. Analyzing the factors that influence the satisfaction degree of public transportion, it puts forward the evaluation index system of satisfaction degree. In order to determine effectively the satisfaction degree, used the group eigenvalue method to decide the index weight, and the matter element model of satisfaction degree for public transportion was constructed. Finally, the scientificity and rationality of the evaluation method was detected by application example, according to the evaluation result, carried on the corresponding analysis. ©(2013) Trans Tech Publications, Switzerland.

语种： 英文

作者： 尹罡[1,2];甄峰;汤放华;孙倩

期刊： 地理与地理信息科学,2018年34(1):53-58 ISSN：1672-0504

作者机构： [尹罡[1,2]] 南京大学地理与海洋科学学院,江苏南京210093;[尹罡[1,2]] 湖南城市学院管理学院,湖南益阳413000;南京大学建筑与城市规划学院,江苏南京,210093;湖南城市学院建筑与城市规划学院,湖南益阳,413000;[孙倩] 湖南城市学院管理学院,湖南益阳,413000

关键词： 信息技术;休闲行为;网络休闲;实体休闲

摘要： 技术影响下的行为变迁是学术界普遍关注的热点问题。信息技术的迅猛发展与应用对人们的休闲行为,包括休闲方式、决策与组织逻辑,均产生了深刻影响。然而由于经济社会发展的阶段性及人们对休闲行为本身认识上的价值偏差,当前关于信息技术对人类行为影响的学术成果主要集中于以工作为代表的生产性行为和以消费为代表的补给性行为等方面,鲜见关于信息技术对人类休闲行为影响的研究成果。该文系统分析了信息技术影响下休闲行为研究的社会背景,认为人们对网络休闲的价值感知、技术文化适应性的替代或补充以及实体休闲制约是解释该背景下休闲行为的重要理论视角,并提出了休闲行为模式变迁及其机理这一信息技术影响下休闲行为研究的核心问题。最后,在上述系统分析的基础上,构建了一个信息技术影响下休闲行为研究的概念性分析框架。

语种： 中文

作者： 刘君

期刊： 林产工业,2008年35(1): 41-42,45 ISSN：1001-5299

作者机构： [刘君] 湖南城市学院建规学院

关键词： 研究开发;旋切单板;模压成型;竹材;产品;抗拉强度;材料特性;尖削度

摘要： 竹材多节、中空、呈尖削度状,且仅具有纵向纤维,对研制开发竹材旋切单板产品有一定难度。但竹材特具清雅纹理和文化韵味,并具有顺纹抗拉强度远大于 木材的特点，因此可从技术上攻关并充分利用其材料特性研究开发新产品。下面笔者介绍的是研制开发的用竹材旋切单板制成的模压成型产品。

语种： 中文

作者： 刘海燕;吕文明

期刊： 城市问题,2011年(06):20-23,29 ISSN：1002-2031

作者机构： [吕文明; 刘海燕] 湖南城市学院建筑与城市规划学院

关键词： 风水形势论;中国古典园林;千尺为势，百尺为形

摘要： 论述了传统风水形势论的渊源、沿革及内涵,揭示了形势论中"千尺为势,百尺为形"的基本精神及理论的现代延伸。以丰富的实例,从选址、改造、整体布势以及局部立形四个方面,论证了风水学说形势论对我国传统城市空间构成的影响,旨在用传统风水理论中所含有的具科学性的元素来指导未来的城市设计,以创造出更加宜人的具有中国特色的人居环境。

语种： 中文

作者： 彭建国;汤放华

期刊： 城市问题,2011年(03):21-24 ISSN：1002-2031

作者机构： [汤放华; 彭建国] 湖南城市学院建筑与城市规划学院

关键词： 传统地域特色;原因;地域特色现状;影响要素;未来地域特色;发展道路

摘要： 分析了传统城市地域特色形成的内在原因以及使现代城市地域特色日渐消失的影响要素,阐述了全球化背景下现代城市地域特色的未来发展趋势。认为未来城市地域特色是基于新技术、新材料运用,以满足现代人需求的特定地域环境下应具有的城市空间和建筑形式,强调应该是什么,而非模仿传统的像什么的一种地域特色。指出应以发展的眼光理性对待城市的地域特色。

语种： 中文

作者： 钟雪飞;钟元满

期刊： 城市问题,2010年(05):90-93 ISSN：1002-2031

作者机构： [钟雪飞] 湖南城市学院建筑与城市规划学院;[钟元满] 长沙市规划管理局

关键词： 公园;空中绿洲;模拟自然

摘要： 从建设空中绿洲的设计理念、模拟自然景观的设计手法和对接社区管理的发展模式等视角,总结了美国著名的西雅图高速公路公园营造的成功经验;指出合理有效地利用城市公路上空潜在的空中空间资源,是大城市环境景观拓展的重要方向。

语种： 中文

作者： 石孟良;龙天翔

期刊： 城市问题,2012年(03):10-13,29 ISSN：1002-2031

作者机构： [龙天翔] 湖南城市学院建筑与城市规划学院;[石孟良] 湖南城市学院建筑研究所

关键词： 当代;建筑表皮;艺术构图;形式逻辑;算法逻辑

摘要： 通过对中外建筑表皮图案形式的归纳整理,提出了建筑表皮艺术构图历史演进的四个阶段,指出并分析了表皮图案化正在成为当代城市建筑表皮艺术的主流趋势;阐述了当代建筑表皮图案的形式逻辑———立面构图的数理逻辑和图案形式的构成逻辑;研究并拓展了当代建筑表皮图案。

语种： 中文

作者： 曾磬;石孟良

期刊： 城市问题,2013年(01):45-50 ISSN：1002-2031

作者机构： [石孟良; 曾磬] 湖南城市学院建筑与城市规划学院

关键词： 居家养老型住宅;边缘空间;优化设计

摘要： 受我国传统养老观念的影响，居家养老型住宅逐渐引起重视。针对目前居家养老型住宅的现状特点，结合边缘空间的内涵和特征，提出了居家养老型住宅边缘空间——建筑入口、公共庭院、阳台、露台等优化设计的具体措施。

语种： 中文

作者： 张海鹰;廖建勇

期刊： 中南大学学报. 自然科学版,2010年41(3):982-987 ISSN：1672-7207

通讯作者： Zhang, H.-Y.(zhy1025888@sina.com)

作者机构： [张海鹰; 廖建勇] College of Architecture and City Planning, Hunan City University, Yiyang 413000, China

通讯机构： College of Architecture and City Planning, Hunan City University, China

关键词： 最小二乘支持向量机;振动切削;切削力;软测量技术

摘要： 为提高振动切削过程工件加工精度, 利用最小二乘支持向量机建立振动切削力软测量模型; 利用数控车床振动切削实验系统所采集数据作为最小二乘支持向量机的输入参数, 振动切削力作为输出参数进行仿真分析. 研究结果表明: 该振动切削力软测量模型具有较高的建模精度和较强的泛化能力; 对振动切削力进行软测量后, 加工工件表面粗糙度平均误差可降低50%以上, 圆度平均误差可降低70%以上.

语种： 中文

作者： 周小梅;赵运林;胥正钢;董萌;库文珍

期刊： 生态环境学报,2014年23(12):1980-1985 ISSN：1674-5906

作者机构： [周小梅; 董萌; 库文珍] 湖南城市学院建筑与城市规划学院;[赵运林] 中南林业科技大学;[胥正钢] 湖南农业大学生物安全科学技术学院

关键词： 蒌蒿;吲哚乙酸;内生耐镉细菌;筛选;鉴定

摘要： 从蒌蒿(Artemisia selengensis)体中分离分泌吲哚乙酸(IAA)的内生耐镉(Cd)细菌将有助于构建有效的植物-微生物联合修复体系。本研究以分泌IAA和Cd耐性为筛选指标,采用研磨法从蒌蒿的根、茎、叶中分离能产生IAA的内生耐Cd细菌,并对其铅(Pb)、铜(Cu)、锑(Sb)的耐受性及对蒌蒿生长特性的影响进行研究,根据形态特性、生理生化测定和16S rDNA序列分析对目标菌株进行分类鉴定。结果表明,从蒌蒿体内分离获得2株分泌IAA能力较强的内生耐Cd细菌J_2和Y_5,J_2和Y5菌对Cd的耐受质量浓度均为90 mg·L~(-1),IAA的分泌量分别为23.108、15.192 mg·L~(-1);J_2菌能明显增加蒌蒿的株高、最长根长、平均根长、鲜质量和干质量,Y5菌可显著提高蒌蒿的株高、鲜质量和干质量;J_2和 Y_5菌对 Pb 的耐受质量浓度均为1200 mg·L~(-1),对Cu的耐受质量浓度分别为120和160 mg·L~(-1),对Sb的耐受质量浓度分别为50和150 mg·L~(-1);J_2菌在LB平板上菌落为黄色、近圆形、粘稠,Y5菌在LB平板上菌落为白色、近圆形、湿润;J_2和Y_5菌的16S rDNA序列经扩增,分别获得1条大小约为1500 bp的条带,经比对分别与GenBank中Pantoea agglomerans STY29(HQ220151)、Pseudomonas fluorescens V7c10(KC195905)的相似性最高,结合形态特征与生理生化特性可分别鉴定为成团泛菌(Pantoea agglomerans)和荧光假单胞菌(Pseudomonas fluorescens)。研究表明,从蒌蒿体中分离获得分泌IAA能力较强的内生耐Cd成团泛菌和荧光假单胞菌,为进一步研究其在蒌蒿修复Cd污染土壤中的作用奠定了基础。

语种： 中文

作者： Tan, Xian-Liang;Deng, Zong-Wei;Li, Zhi-Yong;Tang, Jia

期刊： 中南大学学报. 自然科学版,2010年41(3):1178-1185 ISSN：1672-7207

通讯作者： Tan, X.-L.(cysjy@vip.163.com)

作者机构： [Tang, Jia; Deng, Zong-Wei; Tan, Xian-Liang] Planning and Architecture Design and Research Institute, Hunan City University, Yiyang 413000, China;[Li, Zhi-Yong] Hunan Communication Scientific Academy, Changsha 410015, China;[Deng, Zong-Wei] School of Resources and Safty Engineering, Central South University, Changsha 410083, China

通讯机构： Planning and Architecture Design and Research Institute, Hunan City University, China

关键词： 桩板墙;高速公路路基;动力分析;数值方法

摘要： 以邵怀高速公路应用最典型的桩板式挡土墙为例, 以数值方法为研究工具, 考虑车辆与挡墙的距离、汽车载重和汽车速度等因素, 区别挡墙的不同位置(桩、板), 对挡墙的土压力进行现场测试与计算分析. 研究结果表明: 在交通荷载的作用下, 挡土墙受影响的部位主要集中在墙顶以下2 m, 桩(柱)上所受的影响大于板上所受的影响; 当动荷载离挡土墙的距离在0~1.5 m内变化时, 对挡土墙的影响较大, 而当距离大于1.5 m后, 对挡土墙的影响就相当小; 汽车的行车速度对挡墙结构的影响较小; 汽车超载对挡墙的影响较大, 设计时必须考虑这种因素对挡墙的影响.

语种： 中文

作者： 周小梅;赵运林;董萌;库文珍;胥正钢

期刊： 土壤通报,2014年45(6):1390-1395 ISSN：0564-3945

作者机构： [周小梅; 赵运林; 库文珍] 湖南城市学院建筑与城市规划学院;[董萌] 湖南城市学院化学与环境工程学院;[胥正钢] 湖南农业大学生物安全科学技术学院

关键词： 促生细菌;镉污染土壤;土壤微生物;土壤酶活性

摘要： 为研究促生细菌对镉污染土壤微生物数量和酶活性的影响,将促生细菌T7和J2加入洞庭湖镉污染土壤中,通过培养,进行各项目的测定。结果表明,J2菌能显著提高土壤中可培养细菌、放线菌数量,降低土壤中可培养真菌数量,T7菌对放线菌数量影响不明显,T7和J2菌能显著提高细菌/真菌(B/F)和放线菌/真菌(A/F)比值;J2菌能显著地促进土壤中氨化菌、硝化菌、反硝化菌和好氧性固氮菌数量的增加,T7菌对氨化菌和反硝化菌数量影响不显著;J2菌明显促进土壤中脲酶、过氧化氢酶和磷酸酶活性的增强,T7菌对脲酶、过氧化氢酶活性影响显著;土壤微生物数量与酶活性的相关性分析表明,土壤微生物、酶以及土壤微生物与酶之间存在显著或极显著地相关关系。说明促生细菌T7和J2能有效改善洞庭镉污染土壤的微生物环境。

语种： 中文

作者： 孔纲强;杨庆;年廷凯;胡庆春

期刊： 岩土力学,2011年32(2):503-509 ISSN：1000-7598

通讯作者： Kong, G.-Q.(gqkong1@163.com)

作者机构： [孔纲强] Key Laboratory of Education Ministry for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China;[胡庆春] Architecture and City Planning College, Hunan City University, Yiyang, Hunan 413000, China;[杨庆; 年廷凯; 孔纲强] State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian, Liaoning 116024, China

通讯机构： Key Laboratory of Education Ministry for Geomechanics and Embankment Engineering, Hohai University, China

关键词： 桩基;压缩;负摩阻力;扩底楔形桩;数值模拟

摘要： 扩底楔形桩是基于结合常规扩底桩和楔形桩的优点而开发的一种新桩型, 能同时提高桩侧正摩阻力和桩端阻力, 并能有效降低土体沉降引起的负摩阻力对基桩的影响. 简要介绍了扩底楔形桩的受力机制和施工方法; 基于FLAC3 D有限差分软件, 通过针对实际工程的数值模拟验证数值模拟的可靠性, 对该新桩型在竖向抗压和负摩阻力特性方面的力学特性进行了初步探讨, 并与等体积混凝土的常规扩底桩、楔形桩和等截面桩进行了对比分析; 进而研究了桩端土体与桩周土体模量比、楔形角、扩大头直径以及桩体模量等因素对扩底楔形桩力学特性的影响. 研究结果表明, 同等级地面堆载作用下, 扩底楔形桩中桩侧负摩阻力引起的桩顶下拽位移最小、桩身下拽力值介于常规楔形桩和扩底桩两者之间

语种： 中文

作者： 何洋;余红兵;杨知建;肖润林

期刊： 湖南农业大学学报. 自然科学版,2016年42(4):398-402 ISSN：1007-1032

作者机构： [何洋; 肖润林] 中国科学院亚热带农业生态研究所;中国科学院大学;[余红兵] 湖南城市学院建筑与城市规划学院;[杨知建] 湖南农业大学农学院

关键词： 降水径流;氮流失;磷流失;沟渠;生态拦截;非点源污染;长沙县金井河

摘要： 为研究降水径流过程中非点源污染物氮、磷浓度的变化特征,分析降水作用下长沙县金井河小流域农业源头沟渠水中氮、磷的流失特征与生态拦截效应。结果表明:在降水初期非点源污染物氮、磷浓度与降水径流量的变化均呈逐渐递增趋势,雨后均呈递减变化;降水作用下沟渠系统总氮输出的最大值为4.67 mg/L,总磷输出的最大值为0.38 mg/L,其氮素输出的主要形态为氨态氮和硝态氮;雨后各断面氮、磷的输出随着时间的增加呈先增加后降低的趋势,其中总氮与总磷含量分别在雨后第3天和第2天达到最高;菖蒲–茭白段的生态拦截效果明显高于自然段的自然净化效果,表明植物拦截和吸收是植被段氮、磷去除的重要途径,菖蒲、茭白在6月吸收氮、磷分别达26.90、2.34 g/m~2。

语种： 中文