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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 {2.,Shanghai 2.0093,china 2.State Key Laboratory of Clean Energy Utilization,zhejiang University,hangzhou 31002.,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 CH3Cl 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

Calculation of maximum ground movement and deformation caused by mining

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中国有色金属学会会刊：英文版 2011年第S3期21卷 562-569页

作者： LI Pei-xian1, 2. TAN Zhi-xiang1, 2. DENG Ka-zhong1, 2.1. Key Laboratory for Land Environment and Disaster Monitoring of State Bureau of Surveying and Mapping, china University of Mining and technology, Xuzhou 2.1116, china 2. Jiangsu Key Laboratory of Resources and Environmental information engineering, china University of Mining and technology, Xuzhou 2.1116, china Key Laboratory for Land Environment and Disaster Monitoring of State Bureau of Surveying and Mapping China University of Mining and Technology Xuzhou 221116 China Jiangsu Key Laboratory of Resources and Environmental information engineering China University of Mining and Technology Xuzhou 221116 China

In order to know the maximum mining ground deformation of arbitrary surface point, directions of the maximum surface tilt, curvature,horizontal displacement and horizontal deformation caused by multi-working faces were deduced based on probability integral method. The distribution forms of surface deformations in all direction φ∈[0, 2.] were obtained and also equations of maximum deformations were given based on calculation of mining ground deformation in direction φ. A mining subsidence analysis system was developed with VB6.0. The system implements the probability integral mining subsidence prediction with direct integration method, and it can avoid errors of arbitrary shaped working face subdivision of traditional method, and accuracy of mining subsidence prediction can be improved with the direct integral method. The system implements the contour chart and profile chart and also data analysis automation by manipulation of the SURFER kernel function and it complements the defect of existing subsidence prediction software. Calculation of maximum deformations caused by multi-working faces mining in a coal mine of Xuzhou, china was shown as application example. engineering application indicates that maximum deformation of mining ground surface can be calculated and analyzed by the system. The research provides a theoretical basis and calculation tool for mining subsidence prediction and analysis.

关键词： mining subsidence probability integral method movement and deformation system development

Modified extremal optimization for the hard maximum satisfiability problem

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Journal of zhejiang University-Science C(Computers and Electronics) 2011年第7期12卷 589-596页

作者： Guo-qiang ZENG 1,Yong-zai LU 2.Wei-Jie MAO 2.(1 college of Physics & Electronic information {2.,Wenzhou University,Wenzhou 32.035,china) (2.State Key Laboratory of Industrial Control technology,Institute of Cyber-Systems and Control,zhejiang University,hangzhou 31002.,china) college of Physics & Electronic information {2. Wenzhou University Wenzhou China State Key Laboratory of Industrial Control technology Institute of Cyber-Systems and Control Zhejiang University Hangzhou China

Based on our recent study on probability distributions for evolution in extremal optimization (EO),we propose a modified framework called EOSAT to approximate ground states of the hard maximum satisfiability (MAXSAT) problem,a generalized version of the satisfiability (SAT) *** basic idea behind EOSAT is to generalize the evolutionary probability distribution in the Bose-Einstein-EO (BE-EO) algorithm,competing with other popular algorithms such as simulated annealing and *** results on the hard MAXSAT instances from SATLIB show that the modified algorithms are superior to the original BE-EO algorithm.

关键词： Extremal optimization (EO) Evolution Probability distributions Maximum satisfiability (MAXSAT) problem

Application of Rectangular Integral to Numerical Simulation of Hydraulic Transients in Complex Pipeline Systems

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Transactions of Tianjin University 2010年第1期16卷 56-60页

作者：万五一毛欣炜崔秀红 college of Civil engineering and Architecture Zhejiang University college of engineering Florida State University zhejiang University of technology

The hydraulic oscillation of surge tank was analyzed through numerical simulation.A rectangular integral scheme was established in order to improve the numerical *** to the boundary control equation of surge tank, the rectangular integral scheme omits the second-order infinitesimal and simplifies the solving *** example was provided to illustrate the rectangular integral scheme, which is compared with the traditional trapezoid integral *** numerical solutions were gained through the new *** show that the rectangular integral scheme is more convenient than the trapezoid integral one, and it can be applied to the numerical simulation of various surge tanks in complex pipeline systems.

关键词： rectangular integral trapezoid integral surge tank hydraulic oscillation

Resolution method for overlapping peaks based on the fractional-order differential

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Science china Chemistry 2007年第6期50卷 797-805页

作者： LI YuanLu1, YU ShengLin2.& ZHENG Gang2.1 college of information & Control, Nanjing University of information Science & technology, Nanjing 2.0044, china 2.college of Automation engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 2.0016, china college of information & Control Nanjing University of Information Science & Technology Nanjing China college of Automation engineering Nanjing University of Aeronautics and Astronautics Nanjing China

Equations between the differential order and the maximum of the fractional-order differential for the specified peak signals are developed based on the variation of the maximum of the specified peak signals at different orders. Also, equations between the differential order and the zero-crossing of the fractional-order differential of the specified peak signals are proposed according to the variation of the zero-crossing of the specified peak signals at different orders. Characteristic paramters of the Gaus- sian peak, Lorentzian peak, and Tsallis peak can be estimated using estimator I and estimator II which are obtained by the equations above. As a result, a new method is presented to resolve the overlapped peaks signal. Firstly, a fractional-order differential of the specified peak signals is obtained with the fractional-order differentiation filter. Then, characteristic paramters of the specified peak signals can be extracted using estimator I and estimator II. Finally, the Tsallis peak is used as a model to assign the overlapping peak signals correctly. Experimental results show that the proposed method is efficient and effective for the simulated overlapping peaks and detected overlapping voltammetric peak signals.

关键词： fractional-order differentiation filter, fractional-order differential, overlapping peaks, voltammetric peak

Analysis of ganciclovir and its related substances using high performance liquid chromatography and liquid chromatography-mass spectrometry methods

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Journal of Pharmaceutical Analysis 2010年第4期22卷 218-222页

作者： Cheng-Ping Li1,2.Mao Mao1,Lan-Jun Zheng1,Wei-Guang Shan11.college of Pharmaceutical Sciences,zhejiang University of {2.,hangzhou 310032.2.college of Biology and Environment engineering,zhejiang Shuren University,hangzhou 310015,china college of Pharmaceutical Sciences Zhejiang University of Technology Hangzhou 310032 China college of Biology and Environment engineering Zhejiang Shuren University Hangzhou 310015 China

Objective High performance liquid chromatography(HPLC)and liquid chromatography-mass spectrometry(LC/MS)methods were developed for the determination of ganciclovir and its related *** A Hypersil ODS2.column(4.6 mm×2.0 mm,5 μm)was used with a mobile phase of 0.02.M potassium dihydrogen phosphate buffer(pH 6.0)-methanol(92.8)at a flow rate of 1.0 mL/min,and UV detector set at 2.4 nm was used for monitoring the *** The method was simple,rapid,selective and capable of separating all related substances at trace level with a detection limit of 0.04 μg/*** has been validated with respect to accuracy,precision,linearity,and limits of detection and *** linearity range was 10.2.153.0 μg/mL with r=*** percentage recoveries ranged from 96.7% to 101.6%,and RSD was 1.2.%-1.96%(n=5).Conclusion The method was found to be suitable not only for monitoring the reactions during the process development but also for quality control of *** identification of related substances,LC/MS was *** mainly related substances of ganciclovir active pharmaceutical ingredients(API)were determined as guanine,(1,3-dioxolan-4-yl)methyl acetate,and diacetyl guanine.

关键词： ganciclovir related substances high performance liquid chromatography high performance liquid chromatography/mass spectrometry

Coupling analysis of unsteady seepage and stress fields in discrete fractures network of rock mass in dam foundation

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Science china(Technological Sciences) 2011年第S1期54卷 133-139页

作者： CHAI JunRui 1,2.& XU WeiSheng 2.1 college of Hydraulic and Environmental engineering,{2. Three Gorges University,Yichang 443002.{2. 2.college of Hydropower engineering,Xi’an University of technology,Xi’an 710048,{2. college of Hydraulic and Environmental engineering China Three Gorges University Yichang China college of Hydropower engineering Xi’an University of Technology Xi’an China

The drag force of water flow through single fracture and the coupling characteristics of seepage and stress in single fracture surface are analyzed,and a three dimensional model of coupled unsteady seepage and stress fields is *** model is used to the analysis of foundation rock mass of a high *** the coupling effects are considered,the changes of boundary heads have less influence on the inner head of rock mass,and the strong permeability of main fractures *** the coupling effects are not considered,the fractures distribution affects the inner head more *** the upstream water head declines,the inner head of dam foundation slightly declines and the hydraulic gradient distribution becomes smoother.A bigger upstream water level declining velocity has a stronger lag effect,meanwhile the values of stress components change more *** the upstream water level declining velocity directly affects the stability of rock mass in dam foundation and we should take into account the above factors to make sure the safety of the dam during reservoir level fluctuation period.

关键词： hydraulic engineering unsteady seepage stress coupling fractures network rock mass

Catalytic performance of Fe_3O_4-CoO/Al_2._3 catalyst in ozonation of 2.(2.4-dichlorophenoxy) propionic acid,nitrobenzene and oxalic acid in water

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Journal of Environmental Sciences 2010年第10期22卷 1623-1628页

作者： Shaoping Tong,Rui Shi,Hua Zhang,Chunan Ma college of Chemical engineering and Materials Science,State Key Laboratory Breeding Base of Green Chemistry-Synthesis {2.,zhejiang University of {2.,hangzhou 310032.china college of Chemical engineering and Materials Science State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology Zhejiang University of Technology Hangzhou 310032 China

Fe3O4-CoO/Al2.3 catalyst was prepared by incipient wetness impregnation using Fe（NO3）3.9H2. and Co（NO3）2.6H2. as the precursors, and its catalytic performance was investigated in ozonation of 2.（2.4-dichlorophenoxy）propionic acid （2.4-DP）, nitrobenzene and oxalic acid. The experimental results indicated that Fe3O4-CoO/Al2.3 catalyst enabled an interesting improvement of ozonation efficiency during the degradation of each organic pollutant, and the Fe3O4-CoO/Al2.3 catalytic ozonation system followed a radical-type mechanism. The kinetics of ozonation alone and Fe3O4-CoO/Al2.3 catalytic ozonation of three organic pollutants in aqueous solution were discussed under the mere consideration of direct ozone reaction and OH radical reaction to well investigate its performance. In the catalytic ozonation of 2.4-DP, the apparent reaction rate constants （k） were determined to be 1.456 × 10^-2.min-1 for ozonation alone and 4.740 × 10^-2.min^-1 for O3/Fe3O4-CoO/Al2.3. And O3/Fe3O4-CoO/Al2.3 had a larger Rot （6.614 × 10^-9） calculated by the relative method than O3 did （1.800 x 10-9）, showing O3/Fe3O4-CoO/Al2.3 generated more hydroxyl radical. Similar results were also obtained in the catalytic ozonation of nitrobenzene and oxalic acid. The above results demonstrated that the catalytic performance of Fe3O4-CoO/Al2.3 in ozonation of studied organic substance was universal to a certain degree.

关键词： catalytic ozonation Fe3O4-CoO/Al2.3 2.4-DP nitrobenzene oxalic acid kinetics

User-controllable mesh segmentation using shape harmonic signature

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Progress in Natural Science:Materials International 2009年第4期19卷 471-478页

作者： Yongwei Miao a,b, Jieqing Fenga, Jinrong Wanga,c, Xiaogang Jin a a State Key Laboratory of CAD & CG, zhejiang University, hangzhou 31002., {2. b college of Science, zhejiang University of technology, hangzhou 310032. china c information Science & engineering School, hangzhou Normal University, hangzhou 310036, {2. State Key Laboratory of CAD & CG Zhejiang University Hangzhou 310027 China college of Science Zhejiang University of Technology Hangzhou 310032 China information Science & engineering School Hangzhou Normal University Hangzhou 310036 China

Due to different shape modeling applications, partitioning a given complex 3D mesh model into some patches or meaningful subparts is one of the fundamental problems in digital geometry processing. By using the high-dimensional mean-shift clustering scheme in shape signature space, a new method is proposed which can generate user-specified segmentation results automatically for different applications. The shape signature is composed of mesh geometric attributes and its spectral harmonics. The latter one can reflect mesh frequency spectrum information. The low frequency components are essential for semantics-oriented segmentation, while the high frequency components are important for purely geometry-oriented segmentation. The effects of the proposed method are demonstrated by several examples.

关键词： Mesh segmentation Manifold harmonic analysis Shape harmonic signature Mean-shift clustering