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science china(Technological sciences) 2010年第7期53卷 1839-1846页

作者： LIU YangXian, ZHANG Jun, SHENG ChangDong, ZHANG YongChun & ZHAO Liang school of Energy & Environment, southeast university, nanjing 210096, china 1. school of Energy & Environment Southeast University Nanjing 210096 China

Wet removal of NO from coal-fired flue gas by UV/H2O2 Advanced Oxidation Process (AOP) were investigated in a self-designed UV-bubble reactor. Several main influencing factors (UV intensity, H2O2 initial concentration, initial pH value, solution temperature, NO initial concentration, liquid-gas ratio and O2 percentage content) on the NO removal efficiency were studied. The results showed that UV intensity, H2O2 initial concentration, NO initial concentration and liquid-gas ratio are the main influencing factors. In the best conditions, the highest NO removal efficiency by UV/H2O2 advanced oxidation process could reach 82.9%. Based on the experimental study, the influencing mechanism of the relevant influencing factors were discussed in depth.

关键词： UV/H2O2 NO coal-fired flue gas AOP wet removal

Accurate location of all surface wave modes for Green's functions of a layered medium by consecutive perturbations

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science china(Information sciences) 2010年第11期53卷 2363-2376页

作者： SONG Zhe, ZHOU HouXing, HU Jun, LI WeiDong & HONG Wei State Key Laboratory of Millimeter Waves, school of Information science and engineering, southeast university, nanjing 210096, china 1. State Key Laboratory of Millimeter Waves School of Information Science and Engineering Southeast University Nanjing 210096 China

In this paper, an efficient method is proposed to quickly and accurately locate all the surface wave modes of spectral Green’s functions of a layered medium. This method consists of two parts. In the first part, all the surface wave poles without considering the medium loss are located by a modified dichotomy on the real axis in the complex plane. In the second part, consecutive perturbations with respect to the medium loss are performed, which means that the medium loss is increased step by step from zero to the given value, and at each step, the Newton-Raphson algorithm is employed to find all the current poles, with the poles at the previous step as initial values. The residues of the surface wave poles are analytically calculated without any contour integral. The whole procedure is based on the recursively rational forms of spectral Green’s functions. As an application, all the surface wave poles and their residues obtained by the method proposed in this paper are applied in evaluation of the spatial Green’s functions by the discrete complex image method. Some numerical examples are provided to validate the correctness and efficiency of the proposed method.

关键词： Green’s function Sommerfeld integral surface wave pole perturbation discrete complex image method

Influence of Ingredients of Carbon Black Nano-Particle Suspension of Ammonia Solution on Viscosity of Nanofluid

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湖南大学学报（自然科学版） 2009年第S1期36卷 115-118页

作者： CHENG Bo1,2,DU Kai1,ZHANG Xiao-song1,YANG Liu1(1.school of Energy & Environment,southeast university,nanjing,Jiangsu 210096,china 2.school of Construction engineering,Anhui university of Technology,Maanshan,Anhui 243000,china) school of Energy and Environment Southeast University Nanjing 210096 China school of Construction engineering Anhui University of Technology Maanshan 243000 China

A series of experiments were performed on the viscosity of a nanofluid,produced by mixing carbon black and mulsifier OP-10 using ammonia-water with the ultrasonic *** results show that,when adding surfactant separately in low mass concentrations,at first the viscosity of solution decreases sharply compared with that of ammonia-water,then increases with increasing the concentration of *** a certain concentration of surfactant,the viscosity of nanofluids increases with increasing the concentration of *** on Einstein model and Langmuir absorption theory,a new model was summed up for *** with test values,the calculated values on the new model have verified that the model is suitable to predict the viscosity of nanofluids,because the maximum relative error is less than 5%.Nano-particles absorption in the nanofluids is not only single-molecule layer adsorption,but also multi-layer molecular adsorption and other complicated *** the new model,only based on single-molecule layer adsorption theory of Langmuir,is not fully in line with the real circumstances.

关键词： nanofluid viscosity surfactant absorption

Predicting the Maintainability of Open Source Software Using Design Metrics

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Wuhan university Journal of Natural sciences 2008年第1期13卷 14-20页

作者： ZHOU Yuming1,2, XU Baowen1,3 1. school of computer science and engineering, southeast university, nanjing 210096, Jiangsu,china 2. Department of Computing, Hong Kong Polytechnic university, Hong Kong, china 3. Jiangsu Institute of Software Quality, nanjing 210096, Jiangsu,china school of computer science and engineering Southeast University Nanjing China Department of Computing Hong Kong Polytechnic University Hong Kong China Jiangsu Institute of Software Quality Nanjing China

This paper empirically investigates the relationships between 15 design metrics and maintainability of 148 Java open source software. The results show that size and complexity metrics are strongly related to the maintainability of open source software. However, cohesion and coupling, as currently captured by existing metrics, do not seem to have a significant impact on maintainability. When used together, these metrics can predict system maintainability fairly accurately （mean MREs below 30%）.

关键词： open source: object-oriented maintainability metric prediction regression

A new heuristic algorithm for the circular packing problem with equilibrium constraints

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science china(Information sciences) 2011年第8期54卷 1572-1584页

作者： LIU JingFa 1,2,LI Gang 3 & GENG HuanTong 1 1 school of computer and Software,nanjing university of Information science & Technology,nanjing 210044,china 2 Network Information Center,nanjing university of Information science & Technology, nanjing 210044,china 3 school of Mathematics and Physics,nanjing university of Information science & Technology,nanjing 210044,china 1. school of computer and Software Nanjing University of Information Science & Technology Nanjing 210044 China2. Network Information Center Nanjing University of Information Science & Technology Nanjing 210044 China3. School of Mathematics and Physics Nanjing University of Information Science & Technology Nanjing 210044 China

The circular packing problem with equilibrium constraints is an optimization problem about simplified satellite module layout design.A heuristic algorithm based on tabu search is put forward for solving this *** algorithm begins from a random initial configuration and applies the gradient method with an adaptive step length to search for the minimum energy *** jump out of the local minima and avoid the search doing repeated work,the algorithm adopts the strategy of tabu *** the process of tabu search,we improve the traditional neighboring solutions,tabu objects and the acceptance criteria of the current solution *** test two sets of benchmarks consisting of 11 representative instances from the current *** numerical results show that the proposed algorithm breaks the records in seven out of 11 instances,and obtains the optimal solutions for the other four instances.

关键词： equilibrium constraints packing problem heuristic algorithm tabu search layout optimization

Mechanical behavior of a shelter system based on cable-strut structures

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Journal of Zhejiang university-science A(Applied Physics & engineering) 2012年第12期13卷 895-903页

作者： Jian-guo CAI1,2,Ya ZHOU1,Jian FENG1,2,Yi-xiang XU3 (1Key Laboratory of C&PC Structures of Ministry of Education,southeast university,nanjing 210096,china) (2National Prestress engineering Research Center,southeast university,nanjing 210096,china) (3Department of Civil engineering,Strathclyde university,Glasgow,UK) 1. Key Laboratory of C&PC Structures of Ministry of Education Southeast University Nanjing 210096 China 2. National Prestress engineering Research Center Southeast University Nanjing 210096 China 3. Department of Civil engineering Strathclyde University Glasgow UK

A shelter system based on cable-strut structures,consisting of compressive struts and high-tensile elements,is described in this *** deployment of the shelter is achieved by tightening inclined *** cables are used to terminate the *** state of self-stress of the cable-strut structures in the fully deployed configuration is given,and the minimum strut length and the maximum load design of the shelter are *** mechanical behavior of the system was studied under symmetrical and asymmetrical load *** results show that the shelter in the deployed configuration satisfies the ultimate limit and the serviceability limit state ***,the stability of the cable-strut system is investigated,considering the effect of imperfections on the buckling of the *** conclude that the influence of imperfections based on the consistent imperfection mode method is not significant.

关键词： Foldable structures Cable-strut structures Mechanical behavior Self-stress Stability

Synthesis and Lubrication of Phosphorylcholine Derivative

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Journal of Bionic engineering 2010年第3期7卷 254-258页

作者： Zhenliang Qiao~1, Dangsheng Xiong~1, Lude Lu~2, Pengju Jiang~2 1. Department of Materials science and engineering, nanjing university of science and Technology, nanjing 210094, P.R. china 2. school of Chemical engineering, nanjing university of science and Technology, nanjing 210094, P. R. china [a] Department of Materials science engineering Nanjing University of Science Technology Nanjing 210094 P.R. China [b] School of Chemical Engineering Nanjing University of Science Technology Nanjing 210094 P. R. China

The monomer of phosphorylcholine derivative, O-(5-（2-methacryloxy）-3, 3-dimethyl-3-azapentyl)-O’-（ω-hydroxy-octyl）-phosphatequaternary ammonium salt, was designed and synthesized successfully. It was characterized by the spectra ofHNMR and Mass spectra （ESI+）, and every signal was assigned. Then the lubricating characteristics of the phosphorylcholinederivative were investigated on the tribological setup of ball-oh-flat. The Ultra-High Molecular Weight Polyethylene（UHMWPE） flat was rotated against a stainless steel ball with 6 mm diameter. The load was 2.3 N, which corresponded to amaximal Hertz contact pressure of 29 MPa. Water, phosphorylcholine derivative, and Acrylic Acid （AA） solution were used aslubricants, respectively. Compared with AA, the phosphorylcholine derivative shows significant lubrication. It can be stronglyhydrated under water due to the charged segment in chemical structure. The thick water layers within the chains serves asboundary lubricants, and this is thought to be the molecular origins of lubricating behavior.

关键词： artificial joint articular cartilage molecular lubrication mechanism phosphorylcholine synthesis UHMWPE

TENSILE STRENGTH AND CREEP RESISTANCE OF Mg-9Al-1Zn BASED ALLOYS WITH CALCIUM ADDITION

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Acta Metallurgica Sinica(English Letters) 2001年第5期14卷 330-334页

作者： Y.S. Sun, W.M. Zhang and X.G. Mm Department of Materials science and engineering, southeast university, nanjing 210096, china Dept. of Mat. Sci. and Eng. Southeast Univ. Nanjing 210096 China

Small amount of calcium addition to the Mg-9Al-0.8Zn-0.2Mn (AZ91) alloy resulted in obvious influence on mechanical properties. The yield strength of the alloys increased with the increase of Ca addition and the maximum strength was obtained from the alloy containing 0.15% of Ca. The creep resistance at the temperatures between 150-220°C was also significantly increased with Ca addition. The creep rate (at 200°C, 50 MPa) of the alloy with 0.15% Ca addition was one order of magnitude lower than that of the base alloy (AZ91). Microstructural observations revealed that the addition of calcium refined the microstructure and enhanced the thermal stability of the β precipitates, which accounted for the improvement of creep resistance at high temperatures.

关键词： Additives Aluminum alloys Calcium Creep Tensile strength

H∞ control of a class of nonlinear Hamiltonian descriptor systems

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science china(Information sciences) 2010年第11期53卷 2195-2204页

作者： SUN LiYing1,2 & WANG YuZhen1 1school of Control science and engineering, Shandong university, Jinan 250061, china 2school of science, university of Jinan, Jinan 250022, china 1. school of Control science and engineering Shandong University Jinan 250061 China2. School of Science University of Jinan Jinan 250022 China

This paper studies the stabilization and H∞ control of a class of nonlinear Hamiltonian descriptor systems. Firstly, based on the structural characteristic of the nonlinear Hamiltonian descriptor system, an equivalent nonlinear dissipative Hamiltonian differential-algebraic system is obtained by using restricted system equivalent theory. With the dissipative form, the stabilization problem is then discussed for the nonlinear Hamiltonian descriptor systems, and an H∞ controller is designed. Finally, simulations on a nonlinear circuit system are given.

关键词： nonlinear Hamiltonian descriptor systems stabilization H∞ control

Study on soil solidification based on microbiological precipitation of CaCO_3

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science china(Technological sciences) 2010年第9期53卷 2372-2377页

作者： LU WangJie,QIAN ChunXiang & WANG RuiXing school of Materials science & engineering,Jiangsu Key Laboratory for Construction Materials,southeast university,nanjing 210089,china 1. school of Materials science & engineering Jiangsu Key Laboratory for Construction Materials Southeast University Nanjing 210089 China

The soil solidifying technology started booming from the 1940s and formed an integrated *** paper aimed to study the effect and mechanism of soil solidification by *** specimens treated by different methods were *** the compressive strengths of these specimens on day 7 were tested and the situ bacteria culturing technique in soil was *** the mechanism of soil solidification by microorganisms was explored according to the decomposition rate of substrate,pH value and the SEM and XRD *** results showed that the soil could be solidified by filling enhancement and precipitation of *** compressive strength increased with bacteria A but decreased with substrate B,and soil specimen got a higher strength with bacteria situ *** suitable pH value for bacteria A was 8–9,and the delay of lime addition could make substrate decomposition more completely,lower the influence by the existence of substrate,and improve the *** XRD and SEM images,precipitation of CaCO3 could be speculated.

关键词： soil solidification bacteria compressive strength situ cultured decomposition rate precipitation