Investigation on fatigue characteristics of white sandstone under cyclic loading
作者：
冯春林;吴献强;丁德馨;吴永丰
期刊：
岩石力学与工程学报 ,2009年28(A01):2749-2754 ISSN：1000-6915
通讯作者：
Feng, C.(fq2202@sina.com)
作者机构：
[冯春林; 丁德馨] School of Nuclear Resources and Safety Engineering, University of South China, Hengyang, Hunan 421001, China;[吴永丰] Nuclear Industry of Gansu 219 Team, Tianshui, Gansu 741025, China;[吴献强] Henan Institute of Urban Planning and Design, Zhengzhou, Henan 450000, China
通讯机构：
School of Nuclear Resources and Safety Engineering, University of South China, China
关键词：
岩石力学;白砂岩;周期荷载;疲劳;应力–应变曲线
摘要：
利用RMT–150B岩石力学试验系统,分别采用固定下限应力改变上限应力和固定上限应力改变下限应力的试验方法,进行不同加载条件下白砂岩的疲劳试验,研究周期荷载作用下白砂岩疲劳破坏过程中的疲劳特性、轴向应变的累积规律和轴向不可逆变形的发展规律和应变速率与循环次数的关系。研究结果表明,周期荷载作用下白砂岩的破坏过程宏观上是轴向不可逆变形的逐步发展累积,直到其破坏的过程,且其轴向不可逆变形发展过程表现出不依赖于应力比的三阶段发展规律;且疲劳破坏过程受静态应力–应变全过程曲线的控制,周期荷载的上限应力和振幅是影响白砂岩疲劳破坏过程和疲劳寿命的主要因素。
语种：
中文
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Three-dimensional thermoluminescence spectra of different origin quartz from Altay Orogenic belt, Xinjiang, China
作者：
Tan, Kaixuan* ;Liu, Zehua;Zeng, Sheng;Liu, Yan;Xie, Yanshi;...
期刊：
Radiation Measurements ,2009年44(5-6):529-533 ISSN：1350-4487
通讯作者：
Tan, Kaixuan
作者机构：
[Liu, Yan; Zeng, Sheng; Liu, Zehua; Xie, Yanshi; Tan, Kaixuan] Univ S China, Sch Nucl Resource & Safety Engn, Hengyang 421001, Hunan, Peoples R China.;[Rieser, Uwe] Victoria Univ Wellington, Sch Geog Environm & Earth Sci, Wellington, New Zealand.
通讯机构：
[Tan, Kaixuan] U;Univ S China, Sch Nucl Resource & Safety Engn, Hengyang 421001, Hunan, Peoples R China.
会议名称：
12th International Conference on Luminescence and Electron Spin Resonance
会议时间：
SEP 18-22, 2008
会议地点：
Peking Univ, Beijing, PEOPLES R CHINA
会议主办单位：
[Tan, Kaixuan;Liu, Zehua;Zeng, Sheng;Liu, Yan;Xie, Yanshi] Univ S China, Sch Nucl Resource & Safety Engn, Hengyang 421001, Hunan, Peoples R China.^[Rieser, Uwe] Victoria Univ Wellington, Sch Geog Environm & Earth Sci, Wellington, New Zealand.
关键词：
3-D spectra;Altay orogenic belt;Quartz;Thermoluminescence
摘要：
Three-dimensional thermoluminescence spectra are measured for different types of geological origin quartz from the Altay orogenic belt, northern Xinjiang, China. The results show striking differences which appear to be characteristic of their geological origin. Granitic quartz is dominated by emission bands at 420-430 nm, 550-560 nm, at a temperature of 170 °C. Pegmatite quartz is characterized by an intense 480 nm emission band at 170 °C. Volcanic quartz has exclusive UV (340-360 nm) and violet (410-430 nm) emission bands. Hydrothermal quartz exhibits very different TL spectral characteristics because of different hydrothermal activity and mineralization. Only one TL peaks at 485 nm/170 °C was observed in sedimentary quartz. An intense 730 nm emission band observed at 170 °C considered generally to be characteristics of feldspar was observed in quartz from granite and hydrothermal Au-bearing quartz. This TL peak is probably related to the centre of [FeO<inf>4</inf>]<sup>0</sup> on an Si site. All samples show an intense 990-1000 nm emission band at 330 °C. Identical types of quartz formed in different regions or different geological and tectonic settings can also exhibit striking differences in TL spectra. ©2009 Elsevier Ltd. All rights reserved.
语种：
英文
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An optimized model for blasting parameters in underground mines' deep-hole caving based on rough set and artificial neural network
作者：
Jiang, Fuliang* ;Zhou, Keping;Deng, Hongwei;Li, Xiangyang;Zhong, Yongming
期刊：
SECOND INTERNATIONAL SYMPOSIUM ON COMPUTATIONAL INTELLIGENCE AND DESIGN, VOL 1, PROCEEDINGS ,2009年1:459-462
通讯作者：
Jiang, Fuliang
作者机构：
[Zhou, Keping; Deng, Hongwei; Jiang, Fuliang] Cent S Univ, Sch Resources & Safety Engn, Changsha, Hunan, Peoples R China.;[Zhong, Yongming; Jiang, Fuliang; Li, Xiangyang] Univ South China, Sch Nuclear Res & Safety Engn, Hengyang, Peoples R China.
通讯机构：
[Jiang, Fuliang] C;Cent S Univ, Sch Resources & Safety Engn, Changsha, Hunan, Peoples R China.
关键词：
deep-hole caving;blasting parameters;rough set;artificial neural network;prediction and optimization
摘要：
For better predicting and optimizing the blasting parameters in underground deep-hole mining, 16 groups of deep-hole blasting parameters are collected and collated, combining rough set and artificial neuron network theory, an optimized model for basting parameters in underground mines' long-hole caving based on rough set and artificial neural network is set up. Adopting the rough set software for data reduction, then using the reduced data and raw data as the inputs of the ANN software, the predictions have completed. The input attributes of the ANN model are 6, the RS - ANN model input attributes are 5, both training samples are 12, both forecast samples are 3, the former average prediction accuracy is 0.91 ∼13.7%, the latter is 0.12 ∼7.97%. This study shows that rough set is effective in data reduction while retaining key information;the predicted results of RS - ANN model coincide with the actual situation, and the overall accuracy increased by more. ©2009 IEEE.
语种：
英文
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Economical risk analysis model and intelligent optimization methods study of the soil slope based on the reliability
作者：
Yang, Shi-Jiao;Zeng, Sheng;Yang, Hai-Fei
期刊：
Geotechnical Special Publication ,2009年(190):159-165 ISSN：0895-0563
通讯作者：
Yang, S.-J.
作者机构：
[Yang, Shi-Jiao; Zeng, Sheng; Yang, Hai-Fei] School of Nuclear Resources and Safety Engineering, University of South China, Hengyang, 421001, China
通讯机构：
[Yang, S.-J.] S;School of Nuclear Resources and Safety Engineering, University of South China, China
会议名称：
2009 GeoHunan International Conference - Asphalt Material Characterization, Accelerated Testing, and Highway Management
会议时间：
August 3, 2009 - August 6, 2009
会议地点：
Changsha, Hunan, China
会议论文集名称：
Asphalt Material Characterization, Accelerated Testing, and Highway Management: Selected Papers from the 2009 GeoHunan International Conference
关键词：
Economic factors;Highway and road construction;Optimization;Risk management;Slope stability
摘要：
The study of modeling and optimization methods of the highway soil slope stability has been carried out based on the reliability theory in this paper, because of the extensive uncertainties of the cost and safety factors in highway slope design. First, considering the overall construction cost and risk cost, using the cost-benefit analysis method, taking the minimum total expected cost as the objective function, using the slope-type and slope-ratio as design variables and the reliability index of the slope stability as the main constraint conditions, and then the economical risk analysis model of the soil slope is established. Considering high nonlinearity of the model, genetic algorithm is used to iteratively solve and the optimum program in slope engineering design is developed based on the platform of MATLAB. The program was used to design slope engineering in some highway and the optimum slope-type and slope-ratios were obtained. The result shows that the program has good stability, high computational speed, high precision and practical value. © 2009 ASCE.
语种：
英文
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Metal pollution in Huayuan river in Hunan province in China by manganese sulphate waste residue
作者：
Hu, Nan;Zheng, Ji-Fang* ;Ding, De-Xin;Liu, Jun;Yang, Lu-Qing;...
期刊：
Bulletin of Environmental Contamination and Toxicology ,2009年83(4):583-590 ISSN：0007-4861
通讯作者：
Zheng, Ji-Fang
作者机构：
[Li, Guang-Yue; Liu, Yu-Long; Yin, Jie; Zheng, Ji-Fang; Yang, Lu-Qing; Hu, Nan; Ding, De-Xin; Liu, Jun; Wang, Yong-Dong] Univ S China, Key Discipline Lab Natl Def Biol Technol Uranium, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Zheng, Ji-Fang] U;Univ S China, Key Discipline Lab Natl Def Biol Technol Uranium, Hengyang 421001, Hunan, Peoples R China.
关键词：
Huayuan River;Manganese sulphate waste residue;Sediment;Speciation;Water pollution
摘要：
The Huayuan River in Hunan Province in China is subject to ongoing mining activity with Mn extraction. In this study, the level and environmental significance of metals (including Mn, Cd, Pb, Cu, Zn, Ni and Fe) concentrations in the surface water and river sediments have been investigated along a 187 km reach of the Huayuan River. Using the X-ray fluorescence (XRF) analysis, we analyzed the characterization of metals in manganese sulphate waste residue (MSWR) deposited along the bank of Huayuan River. The speciation of metals in both sediment and MSWR was established using the BCR-three step sequential extraction procedure. In the water samples, the average concentrations of Mn, Cd and Pb exceeded the acceptable concentrations for drinking water in the WHO Guidelines for drinking water quality, Vol. 1, Recommendations, Geneva (2004) and Chinese (GB 5749-2006) guidelines, respectively. The average concentrations of Mn, Cd, Pb and Zn in the river sediments were found to be considerably higher than the corresponding world average shale values. The percentages of Cd (31.4%), Mn (31.1%), Zn (12.8%) and Pb (8.1%) associated with exchangeable and weak acid fraction in the sediments were higher than other metals. Mn (5.81%), Zn (0.208%), Pb (0.0292%) and Cd (0.0113%) were identified in MSWR by XRF analysis. The percentages of Mn, Cd, Zn and Pb associated with the exchangeable and weak acid soluble fraction in MSWR were 41.9%, 31.1%, 23.8% and 9.8%, respectively. The peak solute and sediment-bound metal concentrations were found at the sites of MSWR deposited along the bank of Huayuan River. The results suggested that MSWR deposited along the bank may have a closely relation with the metal pollution of Huayuan River. The results obtained may be useful to assess both short and long-term environmental impact of the MSWR deposited activities and support decisions for a future remediation of this river. © 2009 Springer Science+Business Media, LLC.
语种：
英文
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Test on granules flow parameters of ore drawing with stochastic medium theory
作者：
陶干强;杨仕教;任凤玉
期刊：
岩石力学与工程学报 ,2009年28(A02):3464-3470 ISSN：1000-6915
通讯作者：
Tao, G.(nhutgq@126.com)
作者机构：
[杨仕教; 陶干强] School of Nuclear Resource and Safety Engineering, University of South China, Hengyang, Hunan 421001, China;[任凤玉] School of Resource and Civil Engineering, Northeast University, Shenyang, Liaoning 110004, China
通讯机构：
School of Nuclear Resource and Safety Engineering, University of South China, China
关键词：
采矿工程;随机介质理论;放矿;散体流动参数;标志颗粒;放出体方程;采场结构参数
摘要：
随机介质放矿理论散体流动参数原有测量方法的不足主要表现在:由于散体颗粒运动表现出不确定性和随机性,散体流动参数测量存在较大误差;标志颗粒与试验矿岩散体流动性能不一样;原有参数求解方法一般采用放出量与放出体高度之间的关系式求解,测量结果与实际差别较大.在试验的基础上,改进标志颗粒的制作方法与放置方法,提出利用放出体方程求解散体流动参数的新方法.对2个矿山的4种不同矿石进行散体流动参数测量对比试验.试验结果表明,利用新方法得到的散体流动参数与实际基本相符.将该方法应用于北洺河铁矿生产中,确定合理的采场结构参数,取得较好的技术经济效果,矿石回采率为90%,贫化率为11%.现场应用表明,随机介质放矿理论的散体流动参数可较好地反映崩落矿岩的流动特性,散体流动参数测量新方法可大大地增强随机介质放矿理论的工程适用性.
语种：
中文
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Inverted S-shaped model for nonlinear fatigue damage of rock
作者：
Xiao, Jian-Qing* ;Ding, De-Xin;Xu, Gen;Jiang, Fu-Liang
期刊：
International Journal of Rock Mechanics and Mining Sciences ,2009年46(3):643-648 ISSN：1365-1609
通讯作者：
Xiao, Jian-Qing
作者机构：
[Jiang, Fu-Liang; Xiao, Jian-Qing; Ding, De-Xin] Univ S China, Sch Nucl Resources & Safety Engn, Hengyang 421001, Peoples R China.;[Xu, Gen; Jiang, Fu-Liang; Xiao, Jian-Qing] Cent S Univ, Sch Resources & Safety Engn, Changsha 410083, Peoples R China.;[Xiao, Jian-Qing] Univ S China, Sch Math & Phys, Hengyang 421001, Peoples R China.
通讯机构：
[Xiao, Jian-Qing] U;Univ S China, Sch Math & Phys, Hengyang 421001, Peoples R China.
语种：
英文
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崩落矿岩散粒体流动性能试验研究
作者：
陶干强;杨仕教;任凤玉
期刊：
岩土力学 ,2009年30(10):2950-2954 ISSN：1000-7598
通讯作者：
Tao, G.-Q.(nhutgq@126.com)
作者机构：
[陶干强; 杨仕教] School of Nuclear Resources and Safety Engineering, University of South China, Hengyang 421001, China;[任凤玉] Mining Department, Northeastern University, Shenyang 110006, China
通讯机构：
School of Nuclear Resources and Safety Engineering, University of South China, China
会议名称：
第6届全国水利工程渗流学术研讨会
会议时间：
2009-10-17
会议地点：
武汉
会议主办单位：
中国水利学会
会议论文集名称：
第6届全国水利工程渗流学术研讨会论文集
关键词：
散粒体;流动性能;移动边界;放矿口
摘要：
崩落矿岩散粒体的流动性能对于降低损失贫化具有重要的意义.分析了影响散粒体流动性能的因素,采用标志颗粒法进行了崩落矿岩散粒体流动性能试验,主要考虑的因素有放矿口大小、散体颗粒的粒径以及不同的散体材料.试验内容有放矿口大小与散体移动带试验;不同散体粒径与散体移动带试验、不同散体材料与散体移动带试验;平面和立体模型时放矿口尺寸对放出量影响试验;散体堆积高度与散体移动带试验.研究结果表明,(1)移动边界与散体的材料、颗粒的尺寸大小、放矿口大小等因素有关,而散体堆积高度对其影响不大;(2)散体的流动速度与散体颗粒的大小和放矿口尺寸有关.根据所得试验结果,提出了采矿设计参数的确定方法.
语种：
中文
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岩石疲劳损伤模型的参数估计方法研究
作者：
肖建清;丁德馨;蒋复量;徐根
期刊：
岩土力学 ,2009年30(6):1635-1638 ISSN：1000-7598
通讯作者：
Xiao, J.-Q.
作者机构：
[徐根; 肖建清; 蒋复量] School of Resources and Safety Engineering, Central South University, Changsha 410083, China;[丁德馨; 蒋复量] School of Nuclear Resources and Safety Engineering, University of South China, Hengyang 421001, China;[肖建清] School of Mathematical and Physical Sciences, University of South China, Hengyang 421001, China
通讯机构：
School of Resources and Safety Engineering, Central South University, China
关键词：
曲线拟合;Levenberg-Marquardt法;有限组合法;疲劳累积损伤
摘要：
岩石是一种非均质的复杂地质材料,其疲劳损伤演化具有明显的3阶段发展规律.倒S型非线性疲劳累积损伤模型可以很好地描述这一规律.应用倒S型模型开展损伤计算和疲劳寿命分析的先决条件是确定出不同应力水平下的模型参数,而运用Levenberg-Marquardt法进行倒S型曲线拟合的结果表明,不用任何优化方法而随意选取参数初始值时迭代收敛到最优解的概率很低.因此,提出运用有限组合法估算初始值,即在参数可行域中均匀布点,以这些点为起始点分别实施一次Levenberg-Marquardt优化计算,取残差平方和最小的一组参数作为第2次Levenberg-Marquardt拟合计算的初始值.试验结果表明,以有限组合法估算参数初始值,Levenberg-Marquardt迭代计算总能收敛到最优解.
语种：
中文
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嗜酸氧化亚铁硫杆菌在沥青铀矿石浸出中的作用
作者：
丁德馨;刘玉龙;李广悦;胡南;王永东;...
期刊：
化工学报 ,2009年60(11):2903-2910 ISSN：0438-1157
通讯作者：
Ding, D.(dingdx@nhu.edu.cn)
作者机构：
[丁德馨; 刘玉龙; 李广悦; 胡南; 王永东; 王有团] Key Discipline Lab. for National Defence for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang 421001, Hunan, China
通讯机构：
Key Discipline Lab. for National Defence for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, China
关键词：
沥青铀矿石;嗜酸氧化亚铁硫杆菌;细菌浸出;能谱分析
摘要：
为了研究沥青铀矿石的细菌浸出机理,设计了有菌有铁、有菌无铁及无菌无铁3种矿粉浸出试验及有菌无铁、无菌无铁两种试块浸出试验,检测了矿粉浸出体系中细菌的浓度、pH值、Eh、亚铁离子浓度、总铁离子浓度及铀浓度的变化,分析了浸出尾渣中O、Mg、K、P、S、Fe、U等元素的含量,观测了浸出前后试块表面形貌的变化.结果表明,在沥青铀矿石浸出过程中,嗜酸氧化亚铁硫杆菌可以高效氧化浸出体系中的亚铁、还原态硫及元素硫,使得浸出体系中的Eh升高和pH值降低;有菌有铁浸出体系中,高浓度的细菌、高浓度的铁、低pH值和高Eh可加速铀矿石的浸出和提高铀矿石的浸出率;有菌无铁浸出体系中,即使总铁离子浓度很低,但由于有细菌的存在,同样可以加速铀矿石的浸出和提高铀矿石的浸出率.有菌无铁的试块浸出中,试块表面出现了许多溶蚀坑,这表明细菌对铀矿石具有直接氧化作用.
语种：
中文
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Search for critical slip surface and reliability analysis of soil slope stability based on MATLAB
作者：
Zeng, Sheng;Sun, Bing;Yang, Shijiao;Tan, Kaixuan
期刊：
Geotechnical Special Publication ,2009年(197):184-189 ISSN：0895-0563
通讯作者：
Zeng, S.(zeng0808@126.com)
作者机构：
[Zeng, Sheng] School of Nuclear Resources and Safety Engineering, University of South China, Hengyang, China;[Sun, Bing; Yang, Shijiao; Tan, Kaixuan] School of Resource and Safety Engineering, Central South University, Changsha, China
通讯机构：
[Zeng, S.] S;School of Nuclear Resources and Safety Engineering, University of South China, China
会议名称：
2009 GeoHunan International Conference - Slope Stability, Retaining Walls, and Foundations
会议时间：
August 3, 2009 - August 6, 2009
会议地点：
Changsha, Hunan, China
会议论文集名称：
Slope Stability, Retaining Walls, and Foundations: Selected Papers from the 2009 GeoHunan International Conference
摘要：
The stability analysis of slope is a popular topic in geotechnical engineering, however, the key of stability analysis is how to determine the most dangerous sliding surface, but the traditional method is determined according to experience. Because the genetic algorithm has powerful adaptability and does well in searching the global optimum solution, it was applied to analyze the stability of slope based on the premise of circular sliding surface and the ideal of genetic algorithm. The realization on the genetic algorithm of circular sliding surface is to found circular failure analysis model based on the Bishop method and to search the circle center coordinate of the most dangerous sliding surface with the genetic algorithm toolbox of MATLAB. Then an interface program for the reliability analysis of soil slope stability is developed depended on the platform of MATLAB. The analysis of the numerical example shows that the method of this paper has a higher accuracy, higher iterative convergence speed and stronger adaptability than the traditional calculation method, and that the reliability of the most dangerous sliding surface is the minimum reliability, which provides reference for the optimization design of slope. © 2009 ASCE.
语种：
英文
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Optimal design of stope structural parameters using back-filling method
作者：
陶干强;孙冰;宋丽霞;杨仕教;曾晟
期刊：
采矿与安全工程学报 ,2009年26(4):460-464 ISSN：1673-3363
通讯作者：
Tao, G.-Q.(nhutgq@126.com)
作者机构：
[陶干强; 孙冰; 宋丽霞; 杨仕教; Zeng, Sheng] School of Nuclear Resources and Safety Engineering, University of South China, Hengyang, Hunan 421001, China
通讯机构：
[Tao, G.-Q.] S;School of Nuclear Resources and Safety Engineering, University of South China, China
关键词：
采场结构参数;充填采矿法;弹塑性理论;优化设计
摘要：
采用弹塑性理论,综合考虑了国内某矿山矿体的赋存条件,建立了采场稳定性分析的三维有限元模型,研究了充填采矿法不同结构参数时采场的稳定性以及围岩应力和位移随矿房、矿柱尺寸以及采场控顶高度的变化情况.研究结果表明：采场最大压应力和最大拉应力随矿柱宽度增大而减少,随矿房宽度增大而增大;该矿山合理的采场结构尺寸为矿柱宽8 m,矿房宽10 m,控顶高度8～12 m.
语种：
中文
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硫酸盐还原菌和零价铁协同处理含铀废水
作者：
周泉宇;谭凯旋;曾晟;刘栋
期刊：
原子能科学技术 ,2009年43(9):808-812 ISSN：1000-6931
通讯作者：
Tan, K.-X.(kxtan@mail.nhu.edu.cn)
作者机构：
[Zeng, Sheng; 谭凯旋; 刘栋; 周泉宇] School of Nuclear Resources and Safety Engineering, University of South China, Hengyang 421001, China
通讯机构：
School of Nuclear Resources and Safety Engineering, University of South China, China
关键词：
硫酸盐还原菌;零价铁;含铀废水处理;柱实验
摘要：
含铀废水的处理和利用微生物治理矿山废水的研究已受到环境工作者的高度重视.本工作通过柱实验研究了硫酸盐还原菌(SRB)和零价铁(ZVI)协同去除废水铀和硫酸盐等污染物的潜力.SRB+ZVI可有效去除铀矿山废水中的污染物U(Ⅵ)和SO_4~(2-),U(Ⅵ)的去除率可达99.4%,硫酸根去除率为86.2%,废水的pH可达近中性.U(Ⅵ)和硫酸根均作为硫酸盐还原菌的电子受体而通过生物还原去除.ZVI的腐蚀有利于提高废水pH和形成厌氧还原性环境,加强了SRB的生存和代谢反应,从而对SRB去除废水中U(Ⅵ)和SO_4~(2-)起到协同增强作用.
语种：
中文
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Removal of SO_4~(2-), uranium and other heavy metal ions from simulated solution by sulfate reducing bacteria
作者：
Wang Qing-liang* ;Ding De-xin;Hu E-ming;Yu Run-lan;Qiu Guan-zhou
期刊：
中国有色金属学报(英文版) ,2008年18(6):1529-1532 ISSN：1003-6326
通讯作者：
Wang Qing-liang
作者机构：
[Wang Qing-liang; Yu Run-lan; Qiu Guan-zhou] Cent S Univ, Sch Minerals Proc & Bioengn, Changsha 410083, Peoples R China.;[Ding De-xin; Wang Qing-liang; Hu E-ming] Univ S China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Peoples R China.
通讯机构：
[Wang Qing-liang] C;Cent S Univ, Sch Minerals Proc & Bioengn, Changsha 410083, Peoples R China.
会议名称：
24th International Mineral Processing Congress (IMPC)
会议时间：
SEP 24-28, 2008
会议地点：
Beijing, PEOPLES R CHINA
会议主办单位：
[Wang Qing-liang;Yu Run-lan;Qiu Guan-zhou] Cent S Univ, Sch Minerals Proc & Bioengn, Changsha 410083, Peoples R China.^[Wang Qing-liang;Ding De-xin;Hu E-ming] Univ S China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Peoples R China.
关键词：
sulfate reducing bacteria;in-situ leaching of uranium;radioactively contaminated groundwater;bioremediation
摘要：
In the case of in-situ leaching of uranium, the primitive geochemical environment for groundwater is changed since leachant is injected into the water bearing uranium deposit. This increases the concentration of SO_4~(2-), uranium and other heavy metal ions and results in the groundwater contamination. The effects of pH values of the simulated solution on the reduction of SO_4~(2-) and the removal of uranium and other heavy metal ions by sulfate reducing bacteria(SRB) were studied. The results show that, when the pH value of the simulated solution is about 8, the reduction rate of SO_4~(2-) by SRB and the removal rate of uranium, Mn~(2+), Zn~(2+), Pb~(2+) and Fe~(2+) will reach their highest values. A bioremediation technique for remediation of groundwater in in-situ leaching uranium mine can be developed.
语种：
英文
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合成四氧化三铁纳米粒子形貌的调控机理和方法
作者：
潘伟;吴超;李孜军;杨月平
期刊：
硅酸盐学报 ,2008年36(10):1488-1493 ISSN：0454-5648
通讯作者：
Hu, D.(123hudawei@163.com)
作者机构：
[潘伟] 辽宁工程技术大学;[吴超; 李孜军] 中南大学资源与安全工程学院;[杨月平] 南华大学核资源工程学院
通讯机构：
College of Materials Science and Engineering, South China University of Technology, China
关键词：
四氧化三铁;纳米颗粒;形貌;调控
摘要：
四氧化三铁纳米粒子形貌对其磁性质和应用具有重要的影响。介绍了纳米四氧化三铁粒子制备过程中形貌调控的机理和主要方法，并讨论了四氧化三铁纳米粒子制备的形貌调控方法发展趋势和研究方向。
语种：
中文
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Nontrivial solutions of discrete elliptic boundary value problems
作者：
Tang, Hengsheng;Luo, Wei;Li, Xu;Ma, Manjun*
期刊：
Computers & Mathematics with Applications ,2008年55(8):1854-1860 ISSN：0898-1221
通讯作者：
Ma, Manjun
作者机构：
[Tang, Hengsheng; Ma, Manjun] Nanhua Univ, Dept Math & Phys, Hengyang 421001, Hunan, Peoples R China.;[Tang, Hengsheng] Hunan Univ, Dept Appl Math, Changsha 410082, Hunan, Peoples R China.;[Luo, Wei] Hunan Inst Technol, Fundamental Dept, Hengyang 421001, Hunan, Peoples R China.;[Li, Xu] Nanhua Univ, Dept Nucl Resource & Safety Engn, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Ma, Manjun] N;Nanhua Univ, Dept Math & Phys, Hengyang 421001, Hunan, Peoples R China.
关键词：
discrete elliptic boundary value problems;nontrivial solutions;existence;variational method;Mountain Pass Theorem;PARTIAL DIFFERENCE-EQUATIONS;EXISTENCE
摘要：
This paper aims to show the existence of nontrivial solutions for discrete elliptic boundary value problems by using the "Mountain Pass Theorem". Some conditions are obtained for discrete elliptic boundary value problems to have at least two nontrivial solutions. The results obtained improve the consequences of the known literature [Guang Zhang, Existence of nontrivial solutions for discrete elliptic boundary value problems, Numer. Methods Partial Differential Equations 22 (6) (2006) 1479-1488]. (C) 2007 Elsevier Ltd. All rights reserved.
语种：
英文
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沥青铀矿石细菌浸出机理的实验研究
作者：
丁德馨;李广悦;刘玉龙;王永东;王有团
期刊：
过程工程学报 ,2008年8(5):859-865 ISSN：1009-606X
通讯作者：
Ding, D.-X.(dingdx@nhu.edu.cn)
作者机构：
[丁德馨; 王有团; 李广悦; 王永东; 刘玉龙] Key Discipline Lab. for National Defence for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang 421001, China
通讯机构：
[Ding, D.-X.] K;Key Discipline Lab. for National Defence for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, China
关键词：
氧化亚铁硫杆菌;沥青铀矿石;浸铀机理;浸出率;间接作用
摘要：
采用氧化亚铁硫杆菌作为实验菌，针对有菌有Fe~(2＋)、有菌无铁、无菌有Fe~(3＋)、无菌有Fe~(2＋)、不控制pH值的无菌无铁和pH值控制在2.0的无菌无铁6种沥青铀矿石浸出体系，考察了浸出过程中细菌的浓度、溶液pH值、电位、亚铁离子浓度、全铁离子、铀浓度等参数的变化，得到铀矿石的浸出率分别为98.00％，80.33％，97.66％，93.00％，20.33％，72.00％。结果表明，在沥青铀矿石的细菌浸出中，细菌的作用以间接作用为主，即细菌把还原态的硫或单质硫及Fe~(2＋)氧化成Fe_2（SO_4）_3。由于Fe_2（SO_4）_3是一种强氧化剂，将不溶的U（Ⅳ）氧化为可溶解的U（Ⅵ），从而使沥青铀矿石中的铀得以浸出。
语种：
中文
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Flow-induced vibration and stability of an element model for parallel-plate fuel assemblies
作者：
Cui, Zhen-Dong* ;Tang, Yi-Qun;Guo, Chang-Qing;Yuan, Li;Yan, Chun-Ling
期刊：
Nuclear Engineering and Design ,2008年238(7):1629-1635 ISSN：0029-5493
通讯作者：
Cui, Zhen-Dong
作者机构：
[Tang, Yi-Qun; Cui, Zhen-Dong] Tongji Univ, Dept Geotech Engn, Shanghai 200092, Peoples R China.;[Tang, Yi-Qun; Cui, Zhen-Dong] Tongji Univ, Minist Educ, Key Lab Geotech & Underground Engn, Shanghai 200092, Peoples R China.;[Guo, Chang-Qing] Univ S China, Sch Math & Phys, Hengyang 421001, Peoples R China.;[Yuan, Li] Tongji Univ, Sch Aerosp & Appl Mech, Shanghai 200092, Peoples R China.;[Yan, Chun-Ling] Univ S China, Fac Nucl Resources & Safety Engn, Hengyang 421001, Peoples R China.
通讯机构：
[Cui, Zhen-Dong] T;Tongji Univ, Dept Geotech Engn, Shanghai 200092, Peoples R China.
摘要：
Flow-induced vibration and stabilities of the parallel-plate assemblies are studied theoretically. A model of multi-parallel-beams joined with single-beam is adopted in the theoretical analysis of the natural vibration characteristics of the parallel-plate assemblies. The functions of the dry-modal mode are used as trial functions to solve the equations of the complex-modal mode by the variational method for the natural frequencies and modes of the wet modal. The critical flow velocity and destabilizing deflection are solved by the direct method and the variational method for the stability of the parallel-plate assemblies and the results of the two methods agree with each other. This paper discovers some systemic results from theoretical and numerical analysis, which offers several useful methods and data to the design and safe operation for the fuel element of nuclear reactors. ©2008 Elsevier B.V. All rights reserved.
语种：
英文
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新疆阿舍勒铜矿石英的释光特征及矿床成因意义
作者：
谭凯旋;胡鄂明;谢焱石
期刊：
核技术 ,2007年30(11):911-916 ISSN：0253-3219
通讯作者：
Tan, K.
作者机构：
[谢焱石; 谭凯旋; 胡鄂明] School of Nuclear Resources and Safety Engineering, University of South China, Hengyang 421001, China
通讯机构：
[Tan, K.] S;School of Nuclear Resources and Safety Engineering, University of South China, China
会议名称：
全国第十次释光与电子自旋共振测定年代学术讨论会
会议时间：
2006-11-06
会议地点：
杭州
会议论文集名称：
全国第十次释光与电子自旋共振测定年代学术讨论会论文集
关键词：
热释光;光释光;石英;阿舍勒铜矿;矿床成因
摘要：
对新疆阿舍勒铜矿中的石英进行了二维、三维热释光和光释光的分析,对该铜矿附近的凝灰岩、玛尔卡库里大断裂中的石英脉、金矿和花岗伟晶岩中的石英矿物进行了热释光、光释光的分析与对比.铜矿体中的石英的释光特征与凝灰岩、断裂带石英脉、金矿、花岗伟晶岩中石英存在较大差异.铜矿中石英在170℃有2个发光峰,波长段分别为340nm和405nm左右,而没有如金矿和断裂带石英中存在的与热液成因相关的560-590 nm附近的发光峰,也没有如花岗伟晶岩石英中存在的与深成岩浆作用有关的476nm和625nm附近的2个发光峰.结合对样品的稀土元素进行的中子活化分析,证明铜矿的形成与金的流体成矿不同,属于火山成因铜矿床.
语种：
中文
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Reliability analysis of rock slope based on ABAQUS-ANFIS-MCS
作者：
曾晟;孙冰;杨仕教;戴剑勇
期刊：
岩土力学 ,2007年28(12):2661-2665+2670 ISSN：1000-7598
通讯作者：
Zeng, S.(zeng0808@126.com)
作者机构：
[Zeng, Sheng; 杨仕教; 孙冰; 戴剑勇] School of Nuclear Resources and Environment, Nanhua University, Hengyang 421001, China
通讯机构：
School of Nuclear Resources and Environment, Nanhua University, China
关键词：
边坡稳定性;可靠性分析;有限元分析;蒙特卡罗模拟;自适应神经模糊推理系统
摘要：
针对岩质边坡工程稳定性分析中参数的不确定性，基于ABAQUA建立了平面破坏型边坡有限元分析模型。并用该模型进行了边坡稳定状态的数值模拟，以获得进行ANFIS分析的数据。同时基于自适应神经模糊推理系统建立了岩体力学参数与边坡抗滑力和下滑力的映射模型，分析得到抗滑力和下滑力的统计特征。根据蒙特卡罗模拟方法用MATLAB语言编写了求解边坡的破坏概率和可靠度的计算程序，对湖南雪峰水泥原料矿山的露天矿边坡进行可靠度分析。研究结果表明，该方法具有避免编写冗长的有限元计算程序、节省机时、计算精度高的优点。
语种：
中文
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