检索结果-南通市图书馆

Characteristics of high-sulfate wastewater treatment by two-phase anaerobic digestion process with Jet-loop anaerobic fluidized bed

引用

Journal of Environmental Sciences 2007年第3期19卷 264-270页

作者： WEI Chao-hai, WANG Wen-xiang, DENG Zhi-yi, WU Chao-fei School of Environmental Science and Engineering, south china university of technology, Guangzhou 510640, china. School of Environmental Science and Engineering South China University of Technology Guangzhou 510640 China

A new anaerobic reactor, Jet-loop anaerobic fluidized bed （JLAFB）, was designed for treating high-sulfate wastewater. The treatment characteristics, including the effect of influent COD/SO42 ratio and alkalinity and sulfide inhibition in reactors, were discussed for a JLAFB and a general anaerobic fiuidized bed （AFB） reactor used as sulfate-reducing phase and methane-producing phase, respectively, in two-phase anaerobic digestion process. The formation of granules in the two reactors was also examined. The results indicated that COD and sulfate removal had different demand of influent COD/SO4^2- ratios. When total COD removal was up to 85%, the ratio was only required up to 1.2, whereas, total sulfate removal up to 95% required it exceeding 3.0. The alkalinity in the two reactors increased linearly with the growth of influent alkalinity. Moreover, the change of influent alkalinity had no significant effect on pH and volatile fatty acids （VFA） in the two reactors. Influent alkalinity kept at 400-500 mg/L could meet the requirement of the treating process. The JLAFB reactor had great advantage in avoiding sulfide and free-H2S accumulation and toxicity inhibition on microorganisms. When sulfate loading rate was up to 8. 1 kg/（m^3.d）, the sulfide and free-H2S concentrations in JLAFB reactor were 58.6 and 49.7 mg/L, respectively. Furthermore, the granules, with offwhite color, ellipse shape and diameters of 1.0-3.0 mm, could be developed in JLAFB reactor. In granules, different groups of bacteria were distributed in different layers, and some inorganic metal compounds such as Fe, Ca, Mg etc. were found.

关键词： Jet-loop anaerobic fluidized bed reactor sulfate wastewater two-phase anaerobic digestion process granule sludge

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

MICROSTRUCTURES OF A NOVEL HIGH STRENGTH AND WEAR-RESISTING ZINC ALLOY

引用

中国有色金属学会会刊：英文版 1995年第4期5卷 84-88,132页

作者： Li Yuanyuan Xia Wei Ngai Tungwai Leo Luo Junming Zheng Lingyi(Department of Mechanical Engineering,south china university of technology, Guangzhou 51064) south china Univ of technology Guangzhou China

ＭＩＣＲＯＳＴＲＵＣＴＵＲＥＳＯＦＡＮＯＶＥＬＨＩＧＨＳＴＲＥＮＧＴＨＡＮＤＷＥＡＲ－ＲＥＳＩＳＴＩＮＧＺＩＮＣＡＬＬＯＹＬｉＹｕａｎｙｕａｎ；ＸｉａＷｅｉ；ＮｇａｉＴｕｎｇｗａｉＬｅｏ；ＬｕｏＪｕｎｍｉｎｇ；Ｚｈｅ... 详细信息

ＭＩＣＲＯＳＴＲＵＣＴＵＲＥＳＯＦＡＮＯＶＥＬＨＩＧＨＳＴＲＥＮＧＴＨＡＮＤＷＥＡＲ－ＲＥＳＩＳＴＩＮＧＺＩＮＣＡＬＬＯＹＬｉＹｕａｎｙｕａｎ；ＸｉａＷｅｉ；ＮｇａｉＴｕｎｇｗａｉＬｅｏ；ＬｕｏＪｕｎｍｉｎｇ；ＺｈｅｎｇＬｉｎｇｙｉ（Ｄｅｐａｒｔｍｅ...

关键词： zinc alloy microstructure strength wear-resistance

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

SYNTHESIS OF POLY(VINYL ACETATE)-INTERCALATED GRAPHITE OXIDE BY AN IN SITU INTERCALATIVE POLYMERIZATION

引用

Chinese Journal of Polymer Science 2000年第5期18卷 413-418页

作者： Ping-gui Liu Peng Xiao Min Xiao Ke-cheng Gong Beijing Institute of Aeronautical Materials, Beijing 100095, china Polymer Structure & Modification Lab, south china university of technology, Guangzhou 510640, china Inst Aeronaut Mat Beijing 100095 Peoples R China S china Univ Technol Polymer Struct & Modificat Lab Guangzhou 510640 Peoples R China

Graphite oxide, a pseudo-two-dimensional solid in bulk form, was synthesized from natural graphite powder by oxidization with KMnO4 in concentrated H2SO4. The poly(vinyl acetate)-intercalated graphite oxide nano-composite was prepared by an in situ intercalative polymerization reaction, in which n-octanol-graphite oxide intercalation compounds were first obtained, vinyl acetate monomer was then dispersed into the interlayer of modified graphite oxide, followed by thermal polymerization of the monomer. It was experimentally shown that the c-axis space of poly(vinyl acetate)-intercalated graphite oxide was increased to 0.115 nm, which suggested there existed a monolayer of poly(vinyl acetate) chain between the layers of graphite oxide. The nanocomposite was also characterized with thermal analysis and FT-IR spectrometry.

关键词： graphite oxide poly(vinyl acetate) intercalate

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Friction Stir Welding of Aluminum Alloys

引用

Journal of Wuhan university of technology(Materials Science) 2004年第1期19卷 61-64页

作者：傅志红 Zhuzhou Institute of technology

Friction stir welding(FSW),a new solid-state welding technology invited in the early 1990s,enables us weld aluminum alloys and titanium alloys *** processing of FSW,the microstructure in FSW alloys and the factors inf... 详细信息

关键词： friction stir welding stir-welding head aluminum alloy microstructure

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

An　Impulse　Weakly　Observability　of　Generalized　Linear　Systems

引用

Journal of Systems Engineering and Electronics 1998年第3期9卷 16-22页

作者： Qiu Weigen & Liu Yongqing(Department of Automatic Control Engineering, south china university of technology,Guangzhou 510641, P. R. china ) Department of Automatic Control Engineering. south china university of technology Guangzhou 510641. P. R. China

This paper mainly discusses the singular linear systems of distributional version. By using its matrices coefficients and some invariant subspaces, the distributionally weakly obseervability and the impulse observabil... 详细信息

关键词： Impulse Distributionally weakly unobservability Invariaot subspace

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A　NEW　CATALYTIC　PROCESS　FOR　THE　DIRECT　SYNTHESIS　OF　DIMETHYL　CARBONATE　FROM　CARBON　DIOXIDE　AND　METHANOL

引用

Chinese Journal of Catalysis 1996年第2期17卷 91-92页

作者： Jiang Qi Lin Qihe Huang Zhongtao (Department of Chemical Engineering,south china university of technology, Guangzhou 510641) Department of Chemical Engineering South China University of Technology Guangzhou 510641

ＡＮＥＷＣＡＴＡＬＹＴＩＣＰＲＯＣＥＳＳＦＯＲＴＨＥＤＩＲＥＣＴＳＹＮＴＨＥＳＩＳＯＦＤＩＭＥＴＨＹＬＣＡＲＢＯＮＡＴＥＦＲＯＭＣＡＲＢＯＮＤＩＯＸＩＤＥＡＮＤＭＥＴＨＡＮＯＬ￥ＪｉａｎｇＱｉ；ＬｉｎＱｉｈｅ；Ｈｕａ... 详细信息

ＡＮＥＷＣＡＴＡＬＹＴＩＣＰＲＯＣＥＳＳＦＯＲＴＨＥＤＩＲＥＣＴＳＹＮＴＨＥＳＩＳＯＦＤＩＭＥＴＨＹＬＣＡＲＢＯＮＡＴＥＦＲＯＭＣＡＲＢＯＮＤＩＯＸＩＤＥＡＮＤＭＥＴＨＡＮＯＬ￥ＪｉａｎｇＱｉ；ＬｉｎＱｉｈｅ；ＨｕａｎｇＺｈｏｎｇｔａｏ（Ｄｅｐａｒｔ...

关键词： dimethyl carbonate carbon dioxide methanol magnesium methoxidecatalyst

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Time-delayed feedback control optimization for quasi linear systems under random excitations

引用

Acta Mechanica Sinica 2009年第3期25卷 395-402页

作者： Xueping Li Demin Wei Weiqiu Zhu School of Civil Engineering and Transportation, south china university of technology, 510640 Guangzhou, china Department of Mechanics, State Key Laboratory of Fluid Power Transmission and Control, Zhejiang university, 310027 Hangzhou, china School of Civil Engineering and Transportation South China University of Technology 510640 Guangzhou China Department of Mechanics State Key Laboratory of Fluid Power Transmission and Control Zhejiang University 310027 Hangzhou China

A strategy for time-delayed feedback control optimization of quasi linear systems with random excitation is proposed. First, the stochastic averaging method is used to reduce the dimension of the state space and to derive the stationary response of the system. Secondly, the control law is assumed to be velocity feedback control with time delay and the unknown control gains are determined by the performance indices. The response of the controlled system is predicted through solving the Fokker-Plank-Kolmogorov equation associated with the averaged Ito equation. Finally, numerical examples are used to illustrate the proposed control method, and the numerical results are confirmed by Monte Carlo simulation .

关键词： Quasi linear system Time-delayed feedback Stochastic averaging method Random excitation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Feedback Control of Chaos in Delay Maps

引用

Journal of Systems Engineering and Electronics 2001年第1期12卷 75-77页

作者： Zhang Yongdong Liu Yongqing & Liu Shutang Department of Automatic Control Engineering, south china university of technology, Guangzhou 510640, P. R. china Department of Automatic Control Engineering South China University of Technology

In this paper, we discuss feedback control of a class of delay chaotic maps. Our aim is to drive the chaotic maps to its initially unstable fixed points by using linear and nonlinear state feedback control. The control is achieved by using small, bounded perturbations. Some numerical simulations are given to demonstrate the effectiveness of the proposed control method.

关键词： Chaos theory Computer simulation Matrix algebra Numerical analysis Perturbation techniques State feedback

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Interfacial Reaction Between Solid Nickel and Liquid Zinc

引用

Journal of Wuhan university of technology(Materials Science) 2008年第5期23卷 712-716页

作者：孔纲 School of Materials Science and Engineering South China University of Technology

Interfacial reactions between solid nickel and liquid zinc at 450-650 ℃ for 30-600 s were studied. The morphology and growth behavior of intermetallic compound layers at the interface between solid nickel and liquid zinc were observed and analyzed by SEM and EDS. The results show that γ and 8 phases are formed at 450 ℃ at the Ni/Zn interface, and at 550 ℃ and 650 ℃ only ）,phase is formed at the interthce and some δ phase particles will be participated during solidification on the surface of γphase layer. The β1 phase is absent under experimental conditions. Many cracks occur in the layers due to the difference in thermal expansion coefficients of these phases. It is found that the kinetics of the intermetallic compounds growth follows a parabolic law of time, as controlled by the diffusion mechanism. The apparent activation energies are 113.9 kJ/mol for the growth of γphase and 125.87 kJ/mol for γ1 phase, respectively.

关键词： interracial reaction diffusion liquid zinc solid nickel

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Growth of HT-LiCoO2 thin films on Pt-metalized silicon substrates

引用

Rare Metals 2008年第3期27卷 266-272页

作者： ZHANG Yao~(a,b) CHUNG Chiyuen~b ZHU Min~a ~a School of Mechanical Engineering,south china university of technology,Guangzhou 510640,china ~b Department of Physics and Materials Science,City university of Hong Kong,Hong Kong,china [a]School of Mechanical Engineering South China University of Technology Guangzhou 510640 China [b]Department of Physics Materials Science City University of Hong Kong Hong Kong China

Layered LiCoO2（HT-LiCoO2）films were grown on Pt-metalized silicon（PMS）substrates and polished bulk nickel（PBN）substrates by pulsed laser *** effects of substrate temperature,oxygen pressure,and substrate surface roughness on the microstructure of LiCoO2 films were *** has been found that a higher substrate temperature and a higher oxygen pressure favor the formation of better crystallized and less lithium-deficient HT-LiCoO2 *** HT-LiCoO2 film deposited on PBN substrates consists of large randomly orientated equiaxial grains,whereas on PMS substrate,it is made up of loosely packed highly[001]preferential orientated triangular shaped grains with the average grain size less than 100 *** measurements show that the highly[001]preferentially orientated nanostructured HT-LiCoO2 thin film grown on PMS substrate has good structural stability upon lithium insertion/extraction and can deliver an initial discharge capacity of approximately 45μA·h·cm-2·μm-1with a cycling efficiency of above 99% at the charge/discharge rate of 0.5 C.

关键词： thin film LiCoO2 pulsed laser deposition electrochemical properties thin film growth

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：