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A new principle of synthetic cascade utilization of chemical energy and physical energy

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Science china(Technological Sciences) 2005年第2期48卷 163-179页

作者： JIN Hongguang1, HONG Hui1,2. WANG Baoqun1,2. HAN Wei1,2.& LIN Rumou1,2.1. Institute of engineering Thermophysics, Chinese Academy of Sciences, Beijing 100080, china 2. Graduate School of the Chinese Academy of Sciences, Beijing 10003., china Institute of engineering Thermophysics Chinese Academy of Sciences Beijing China Graduate School of the Chinese Academy of Sciences Beijing China

We propose a new principle of the cascade utilization of both chemical energy and physical energy in energy systems with the integration of chemical processes and thermal cycles. Particularly, a general equation of energy levels of substance, Gibbs free energy of chemical reaction and physical energy is explicitly founded. On the basis of this equation, a chemical-looping combustion and an indirect combustion are investigated. Furthermore, a mechanism of energy release, with the combination of decreasing the energy level of Gibbs free energy and upgrading the energy level of low or middle- temperature thermal energy, is clarified. The promising results obtained here establish a theoretical basis for the further investigation of multi-function systems in which energy and the environment are compatible, and create a new approach to improve the performance of traditional thermal cycles.

关键词： chemical energy, cascade utilization, exergy, energy conversion.

Adaptive synchronization of neural networks with different attractors

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Progress in Natural Science:Materials International 2007年第6期17卷 687-695页

作者： Zhang Huaguang1, Guan Huanxin1 and Wang Zhanshan1,2.1. School of Information Science and engineering, Northeastern University, Shenyang 110004, china 2. School of Information Science and engineering, Shenyang Ligong University, Shenyang 110168, china) School of Information Science and engineering Northeastern University Shenyang 110004 China School of Information Science and engineering Shenyang Ligong University Shenyang 110168 China

This paper aims to present an adaptive control scheme for the synchronization of two classes of uncertain neural networks with different attractors. A new sufficient condition for the global synchronization of two kinds of neural networks with different attractors is derived. The proposed control method is efficient and easy to be implemented. Numerical simulation is used to show the effectiveness of the obtained result.

关键词： neural networks attractor adaptive synchronization linear matrix inequality.

Effects of Bahia Grass Cover and Mulch on Runoff and Sediment Yield of Sloping Red Soil in Southern china

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Pedosphere 2011年第2期21卷 238-243页

作者： LI Xin-Hu ZHANG Zhan-Yu YANG Jie ZHANG Guo-Hua WANG Bin College of water Conservancy and Hydropower engineering Hohai University Nanjing 210098 (China) Key Laboratory of efficient Irrigation-Drainage and Agricultural Soil Hohai University Nanjing 210098 (China) Jiangxi Institute of Soil and water Conservation Nanchan9 330029 (China) china Irrigation and Drainage Development Center Beijing 100054 (China) College of water Conservancy and Building engineering Northeast Agricultural University Harbin 150030 (China)

Rainfall,runoff (surface runoff,interflow and groundwater runoff) and soil loss from 5 m × 15 m plots were recorded for 5 years (2.01-2.05) in an experiment with three treatments (cover,mulch and bare ground) on sloping red soil in southern *** runoff and erosion from the Bahia grass (Paspalum notatum Flugge) cover plot (A) and mulch plot (B) during the 5 years were low,despite the occurrence of potentially erosive *** contrast,the bare plot (C) had both the highest surface runoff co{3. and the highest sediment *** were significant differences in interflow and surface runoff and no significant difference in groundwater runoff among *** runoff co{3.s and duration of interflow and groundwater runoff were in the order plot B > plot A > plot *** of Bahia grass cover were excellent,indicating that the use of Bahia grass cover can be a simple and feasible practice for soil and water conservation on sloping red soil in the region.

关键词： groundwater runoff interflow lysimeter soil properties surface runoff

utilization of Coal Gangue and Copper Tailings as Clay for Cement Clinker Calcinations

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Journal of Wuhan University of Technology(Materials Science) 2011年第6期26卷 1205-1210页

作者：裘国华施正伦 State Key Lab of Clean Energy utilization Zhejiang University College of Communication engineering China Jiliang University

In order to avoid environmental pollution from Coal gangue （CG） and copper tailings （CT）, the utilization as cement clinker calcinations was experimentally investigated. Low-calcium limestone was also selected as another raw material. The clinker component and microstructure were analyzed by XRD and SEM. The experimental results showed that qualified cement clinker could be generated by substituting CG and CT compound for clay. While mixed with high-calcium limestone and low-calcium limestone, the calcinations temperature were 50 ℃ or 100 ℃ lower than that of clay. CT and CG contain oxygen-rich minerals and potential of geological rock energy. The energy of CG performs functions and drops down sintering temperature. The calcination time was shortened and the clinker sintering coal consumption reduced while substituting CG and CT for clay, and also served the reutilization of low-calcium limestone, CG and CT.

关键词： coal gangue copper tailings XRD oxygen-rich minerals

Experimental study on CCl_4/CH)4/O_2.N_2.oxidation

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Science china(Technological Sciences) 2010年第4期53卷 1016-1022页

作者： WANG Bo1,2.CHI Yong2.YAN JianHua2.& NI MingJiang2.1 College of Energy and Power engineering,University of Shanghai for Science and Technology,Shanghai 2.0093.china 2.State Key Laboratory of Clean Energy {2.,Zhejiang University,Hangzhou 3.002.,china College of Energy and Power engineering University of Shanghai for Science and Technology Shanghai China State Key Laboratory of Clean Energy utilization Zhejiang University Hangzhou China

Oxidation within the system CCl4/CH4/O2.N2.is studied at atmospheric pressure in a tubular flow reactor to investigate the influence of reaction temperature and chlorine content on chlorinated waste combustion and find incineration process optimization methods for pollution *** reaction temperature varies from 700℃ to 1000℃ and the CCl4/CH4(or Cl/H) mole ratio of the inlet mixture varies from 0.2. to *** profiles are measured with *** is shown that at the same initial CCl4 concentration and reaction temperature adding CH4 favors CCl4 destruction and CO2.*** the destruction and removal efficiency(DRE) of CH4 decreases with lower Cl/H and higher concentrations of toxic products of incomplete combustion such as COCl2.and CH3.l are formed at the same *** chlorine in the system favors CH4 decomposition,but it also inhibits further oxidation of *** temperature assists in both CCl4 destruction and CH4 conversion,and the concentration of toxic combustion intermediates is *** the temperature is the most effective way to enhance CCl4 *** CO2.concentration increases with temperature.A CO concentration peak is observed around 800℃:with a certain Cl/H,the CO concentration first increases with temperature and then *** effect of increasing CH4 concentration on CCl4 destruction becomes mild above 900℃.Rather,it enhances the interaction between chlorine and carbonaceous radicals,which leads to higher concentration of toxic products.

关键词： hazardous waste destruction and removal efficiency(DRE) oxidation carbon tetrachloride chlorinated compounds methane

Simulation of the Influence of Surface Wettability on Viscous Fingering Phenomenon in Porous Media

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Journal of Bionic engineering 2010年第3期7卷 267-275页

作者： B. Dong~1, Y. Y. Yan~2. W. Z. Li~1, Y. C. Song~1 1. Key Laboratory of Ocean Energy utilization and Energy Conservation (Ministry of Education, china), Dalian University of Technology, Dalian 11602., P. R. china 2. Faculty of engineering, University of Nottingham, University Park, NG7 2.D, UK Key Laboratory of Ocean Energy utilization and Energy Conservation (Ministry of Education China) Dalian University of Technology Dalian P. R. China Faculty of engineering University of Nottingham University Park UK

Fingering phenomena are common occurrence in the natural world. It generally takes place when a less viscous fluid displacesa more viscous fluid typically in porous media. Nowadays, such phenomena have extensively been studied due to itsimportance in many industrial fields. In this paper, the effects of surface wettability on finger pattern are studied and simulatednumerically by the Lattice Boltzmann method (LBM). The displacement efficiency is investigated by using two parameters,namely, the breakthrough time and the areal sweep efficiency. The simulation has demonstrated that surface wettability willinfluence the finger pattern no matter the gravity is considered or not, but in the presence of gravity, the finger pattern is muchmore complicated and irregular due to the coexistence and competition of capillary force, viscous force and gravity.

关键词： immiscible fluids porous media viscous fingering wettability

Preparation and performances of bulk porous Al foams impregnated with phase-change-materials for thermal storage

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Progress in Natural Science:Materials International 2012年第5期22卷 440-444页

作者： Jinghua Jiang a,b,Yingying Zhu b,Aibin Ma a,b,Donghui Yang b,c,Fumin Lu b,Jianqing Chen b,Jun Shi b,Dan Song a,b a National engineering Research Center of water {2. {3. utilization and engineering safety,Hohai University,nanjing 2.0098,china b College of Mechanics and Materials,Hohai University,nanjing 2.0098,china c Department of Mechanical and Aerospace engineering,North Carolina State University,Raleigh,NC 2.695-7919,USA National engineering Research Center of water {2. {3. utilization and engineering safety Hohai University Nanjing 210098 China College of Mechanics and Materials Hohai University Nanjing 210098 China Department of Mechanical and Aerospace engineering North Carolina State University Raleigh NC 27695-7919 USA

Shape-stabilized phase change materials(PCMs) exhibit desirable thermal storage properties and are used for energy conservation *** study is focused on the preparation and thermal-/dynamic-mechanical properties of the bulk porous Al foams impregnated with organic PCMs such as paraffins and stearic *** results indicated that the new shape-stabilized PCMs composites could be produced by a simple and eco-friendly constant-pressure impregnation *** filling fraction of PCMs was approximately more than 80% for the impregnated samples with vacuuming or without *** shape-stabilized PCMs/Al-foam composites exhibited considerable latent thermal storage potential for good interface,desirable phase-change temperature range and latent heat values(72.9kJ/kg for the paraffin/Al-foam composite and 66.7kJ/kg for the stearic acid/Al-foam composite).Moreover,the impregnation of PCMs improved the dynamic-compression yield strength,durability and resistance to oxidation of Al foams and made its ideal energy-saving materials.

关键词： Phase change materials Porous Al foams Composites Thermal storage Dynamic mechanical properties

Heuristic for no-wait flow shops with makespan minimization based on total idle-time increments

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Science in china(Series F) 2008年第7期51卷 896-909页

作者： LI XiaoPing1,2.& WU Cheng3.1 School of Computer Science & engineering, Southeast University, nanjing 2.0096, {2. 2.Key Laboratory of Computer Network and Information Integration (Southeast University), Ministry of Education, nanjing 2.0096, {2. 3.Department of Automation, Tsinghua University, Beijing 100084, {2. School of Computer Science & engineering Southeast University Nanjing China Key Laboratory of Computer Network and Information Integration (Southeast University) Ministry of Education Nanjing China Department of Automation Tsinghua University Beijing China

No-wait flow shops with makespan minimization are classified as NP-hard. In this paper, the optimization objective is equivalently transformed to total idle-time minimization. The independence relationship between tasks is analyzed, and objective increment properties are established for the fundamental operators of the heuristics. The quality of the new schedules generated during a heuristic is judged only by objective increments and not by the traditional method, which computes and compares the objective of a whole schedule. Based on objective increments, the time complexity of the heuristic can be decreased by one order. A seed phase is presented to generate an initial solution according to the transformed objective. Construction and improvement phases are introduced by experimental analysis. The FCH （fast composite heuristic） is proposed and compared with the most effective algorithms currently available for the considered problem. Experimental results show that the effectiveness of the FCH is similar to that of the best methods but requires far less computation time. The FCH can also be efficient in real time scheduling and rescheduling for no-wait flow shops.

关键词： no-wait flow shops heuristic makespan Tabu search

utilization of a spiropyran derivative in a polymeric film optode for selective fluorescent sensing of zinc ion

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Science china Chemistry 2006年第3期49卷 246-255页

作者： ZHANG Ying1, SHAO Na1, YANG Ronghua1, LI Ke’an1, LIU Feng1, CHAN Winghong2.& MO Tian2.1. College of Chemistry and Molecular engineering, Peking University, Beijing 100871, {3. 2. Department of Chemistry, Hong Kong Baptist University, Hong Kong, {3. College of Chemistry and Molecular engineering Peking University Beijing China Department of Chemistry Hong Kong Baptist University Hong Kong China

A new spiropyran derivative was synthesized and first utilized in a polymericfilm-based optical sensor for zinc ion. Spiropyrans, combining the characteristics of metal bindingand signal transduction, show potential function in the design of optical chemical sensors(optodes) toward metal ions. When embedded in a plasticized poly (vinyl chloride) (PVC) membrane,the newly synthesized spiropyran derivative 1 exhibits obvious fluorescence enhancement at 63. nm inthe presence of zinc ion in aqueous solution. With the optimum condition described, the optodemembrane responds to zinc ion over a dynamic range of 4.94x10^(-7) to 4.15x10^(-4)mol·L^(-1), witha detection limit of 1.51x10^(-7) mol·L^(-1). The membrane not only displays excellentphotostability, reproducibility and reversibility, but also exhibits high selectivity toward zincion over transition metal ions including Hg^(2.), Cd^(2.), Pb^(2.), Cu^(2.), Fe^(3.) and commoncationic ions presented in the physiological fluids.

关键词： spiropyran, sensor, PVC membrane, zinc ion, fluorescent spectroscopy.