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Science china Chemistry 2004年第5期47卷 388-395页

作者： ZHANG Xingwen1,2. HU Lijiang1, HUANG Yudong1, SUN Dezhi2.& SUN Yi3 1. department of Applied Chemistry,harbin {2. of technology, HUANG Yudong, harbin 150001, china 2. department of environmental engineering, harbin institute of technology, harbin 150001, china 3. department of Experimental Mechanics,harbin {2. of technology, harbin 150001, china 1. department of Applied Chemistry Harbin Institute of Technology HUANG Yudong 150001 Harbin China 2. department of environmental engineering Harbin Institute of Technology 150001 Harbin China 3. department of Experimental Mechanics Harbin Institute of Technology 150001 Harbin China

The organic/inorganic hybrid nanostructural vinylsilsesquioxanes (VSSO) were prepared from the hydrolytic condensation of vinyltrimethoxysilane (VMS). The proposed formu- las of VSSO were assigned with standard spectroscopic techniques, FTIR, NMR (1H, C and 13 2.Si) and MALDI-TOF MS, and a generic formula of the SSO, Tn(OH)x(OR’)y(x, y = 0, 1, 2.; n = 1, 2.; T = RSiO1.5 ?(x+y)/2.). Geometric parameters (Si-O and Si-C bond lengths, Si-O-Si and O-Si-O bond angles) and total energies of the multi-structures of VSSO were calculated by a quantum mechanical investigation and molecular symmetries. According to the results of the calculation, most molecules had stabler ladder structures than the cage isomers, therefore, the most probably reasonable and optimum structure of the VSSO system was the ladder type.

关键词： vinyltrimethoxysilane (VMS), silsesquioxanes (SSO), sol-gel process, quantum mechanical calculation, MNDO.

THE STABILITY OF THE θ-METHODS FOR DELAYDIFFERENTIAL EQUATIONS

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Journal of Computational Mathematics 1999年第4期17卷 441-448页

作者： Jing-jun Zhao Ming-zhu Liu(department of mathematics, harbin institute of technology,{2., china)Shen-shan Qiu(department of Computer Science and engineering, harbin institute of technology,{2., china) 哈尔滨工业大学数学系黑龙江哈尔滨 150001 哈尔滨工业大学数学系黑龙江哈尔滨哈尔滨工业大学计算机系黑龙江哈尔滨

This paper deals with the stability analysis of numerical methods for the solution of delay differential equations. We focus on the behaviour of three θ-methodsin the solution of the linear test equation u'(t)-A(t)u(t)+B(t)u( (t)) with (t)and A(t),B(t) continuous matrix functions. The stability regions for the threeθ-methods are determined.

关键词： Delay differential equations Numerical solution Stabilityl θ-methods.

Catalysts for decomposing ozone tail gas

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Journal of environmental Sciences 2003年第6期15卷 779-782页

作者： LIU Chang-an, SUN De-zhi, WANG Hui, LI Wei (department of environmental Science and {2., harbin institute of technology, harbin 150001,china. department of environmental Science and {2. Harbin Institute of Technology Harbin 150001

The preparation of immobilizing-catalysts for decomposing ozone by using dipping method was studied. XRD, XPS and TEM were used to characterize the catalysts. The three kinds of catalysts were selected preferentially, and their catalytic activities were investigated. The results showed that the catalyst with activated carbon dipping acetate(active components are Mn:Cu=3:2. active component proportion in catalyst is 15%, calcination temperature is 2.0℃) has the best catalytic activity for ozone decomposing. One gram of catalyst can decompose 17.6 g ozone at initial ozone concentration of 2.5 g/m 3 and the residence time in reactor of 0.1 s. The experimental results also indicated that humidity of reaction system had negative effect on catalytic activity.

关键词： ozone tail gas catalytic decomposition immobilizing-catalyst MnO 2 CuO

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湖南大学学报（自然科学版） 2009年第S1期36卷 60-65页

作者： LV Chao1,JIANG Yun-tao2.ZHAO Jia-ning1(1.School of Municipal & environmental engineering,{2. institute of technology,{2.,Heilongjiang 150090,china 2.The Architectural Design and Research institute,{2. institute of technology,{2.,Heilongjiang 150090,china) School of Municipal and environmental engineering Harbin Institute of Technology Harbin 150090 China Architectural Design and Research institute Harbin Institute of Technology Harbin 150090 China

From the view of both objective and subjective factors,the indoor air quality(IAQ)evaluation was *** dioxide(CO2.and formaldehyde(HCHO)were selected as the typical contaminants of indoor air,and the evaluation method of logarithmic index was adopted as the evaluation means of *** the recommended limits(RL)of typical contaminants CO2.and HCHO were given through analysis and *** limits of CO2.and HCHO in Indoor Air Quality Standard of china or other existing standards probably correspond to the level of PD=2.(%).The result shows that the existing standards fail to meet the requirement of the definition of "acceptable indoor air quality",that is to say,less than 2.% of the people express *** PD=2.%,RL of CO2.and HCHO are 72.×10-6 and 0.068×10-6 respectively,which are stricter than the limits in the existing *** method proposed in this paper is applicable to 13.1%≤PD≤86.7%.

关键词： indoor air quality(IAQ) typical contaminants recommended limits(RL) evaluation method of logarithmic index percentage of dissatisfaction(PD)

Comparison of different gel routes used to synthesize Li_2.-Al_2._3-SiO_2.powders

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Rare Metals 2007年第S1期26卷 246-250页

作者： WU Songquan1,2.,LIU Yuyan1),ZHAO Haibo1,SUN Dezhi2.,and WANG Fuping1)1) department of Applied Chemistry,harbin {2. of technology,harbin 150001,china 2. School of Municipal and environmental engineering,harbin {2. of technology,harbin 150001,china harbin Inst Technol Dept Appl Chem Harbin 150001 Peoples R China harbin Inst Technol Sch Municipal & Environm Engn Harbin 150001 Peoples R China

LiO-AlO-SiO(LAS) powders were synthesized through various sol-gel processes using acrylamide,citrate-acrylamide,citrate-nitrate and nitrate gel *** mechanism of formation of LAS in all these four gel routes was established by characterizing the gels and intermediate phases using TG-DTA,FT-IR and XRD *** indicate that the citrate-acrylamide route is easy to control and can obtain homogeneous LAS powders.

关键词： LAS glass-ceramic sol-gel homogeneity

Microstructure and Strength of Laser Welds of Sub-micron Particulate-reinforced Aluminum Matrix Composite Al_2._(3p)/6061Al

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Rare Metals 2001年第3期20卷 178-182页

作者： Liming Liu, Jitai Niu 1) department of Materials engineering, Dalian University of {2.. Dalian 11602., china 2. National Key Laboratory of Advanced Welding Production {2., harbin institute of technology,harbin 150001, china 大连理工大学辽宁大连 116024 哈尔滨工业大学现代焊接生产技术国家重点实验室黑龙江哈尔滨 150001

The microstructure of laser welds of sub-micron particulate-reinforced aluminum matrix composite Al_2._(3p)/6061Al and the weldability of the material were studied. Experimental results indicated that because of the huge specific surface area of the reinforcement, the interfacial reaction between the matrix and the reinforcement was re- strained intenslvely at elevated temperature and pulsed laser beam. The main factor affecting the weldability of the com- posite was the reinforcement segregation in the weld resulting from the push of the liquid/solid interface during the soli- dification of the molten pool. The laser pulse frequency directly affected the reinforcement segregation and the reinfor- cement distribution in the weld, so that the weldability of the composite could be improved by increasing the laser pulse frequency. On the basis of this, a satisfactory welded joint of sub-micron paniculate-reinforced aluminum matrix com- posite Al_2._(3p)/6061Al was obtained by using appopriate welding parameters.

关键词： sub-micron particulate-reinforced aluminum matrix composite laser welding welded joint reinforced matrix

Numerical Simulation and Assessment of Self-induced Tensile Stresses in Steel Ring Restrained Concrete

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Journal of Wuhan University of technology(Materials Science) 2010年第3期25卷 530-533页

作者：马新伟 department of Civil engineering Harbin Institute of Technology

For a better understanding of the strains and stresses,numerical simulation was conducted by using ANSYS under the assumption of absolute bond between the steel and *** results show that the stresses and strains in such concrete and steel rings are uneven;the curves of strains and stresses change gradually around the *** ease numerical computation,the mechanical system was simplified under the assumptions of synchronous deformation and uniform strains and *** results of the numerical simulation and simplified stress calculation can match almost *** means that the simplified mechanical model can be used in stress and visco-elastic behavior quantification.

关键词： restrained shrinkage numerical simulation model simplification

Experimental Study of Effect of Air Duct Structures on Heat Dissipation of Heating-Only Fan Coil

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湖南大学学报（自然科学版） 2009年第S1期36卷 102-105页

作者： WU Xiao-zhou,ZHAO Jia-ning(School of Municipal and environmental engineering,{2. institute of technology,{2.,Heilongjiang 150090,china) School of Municipal and environmental engineering Harbin Institute of Technology Harbin 150090 China

Heating-only fan coil(HFC)is one of the suited end users,which is not only compact but also highly *** the major factors affecting the heat dissipation performance of HFC include leakage through coil bypass,distance between fan and coil,fan structure and air inlet *** natural air convection or forced,experimental studies were made on the effects of these factors upon the heat dissipation performance of *** results show that:1)After reducing the leakage through coil bypass,the heat dissipation of HFC increases 16.9% under natural convection,and increases 8.3% under forced convection.2.After the distance between fan and coil be raised from 2..2.m to 41.7cm,the heat dissipation of HFC decreases 2..3% under natural convection,but increases12.8% under forced convection.3)After changing the fan structure,the heat dissipation of HFC increases 41.8% under natural convection,and the heat dissipation per motor power increases 96.1% under forced convection.4)The heat dissipations of HFC with round pass,slit and strip type of air inlet are different,whose proportion is about 100%,110%,136% under natural convection,and 100%,105%,116% under forced convection.

关键词： heating-only fan coil heat dissipation performance air duct structure natural convection forced convection

Development of Submersible Corrugated Pipe Sewage Heat Exchanger

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湖南大学学报（自然科学版） 2009年第S1期36卷 172-176页

作者： BAI Li1,2.SHI Yan1,TAN Yu-fei2.1.institute of Municipal and environmental {2.,Jilin institute of Architecture and Civil {2.,Changchun,Jilin 13002.,china 2.institute of Municipal and environmental {2.,harbin institute of technology,harbin,Heilongjiang 150090,china) institute of Municipal and environmental {2. Jilin Institute of Architecture and Civil Engineering Changchun 130021 China institute of Municipal and environmental {2. Harbin Institute of Technology Harbin 150090 China

Based on the characteristics of heat transfer for corrugated pipe,a method of calculating and design on the submersible corrugated pipe sewage heat exchanger was put forward theoretically and *** actual movement parameters of air-conditioning system used in this heat exchanger were *** experimental result shows that the quantity of heat transfer of the corrugated pipe sewage heat exchanger can satisfy the building's load with the average coefficient of performance *** the same time,the quantity of heat transfer of the corrugated pipe sewage heat exchanger was compared with that of the other nonmetallic sewage heat exchangers(i.e.,the plastic-Al pipe sewage heat exchanger and PP-R pipe sewage heat exchanger)*** is found out that the effect of heat transfer for submersible corrugated pipe sewage heat exchanger is superior to those of the plastic-Al pipe and the PP-R *** quantity of heat transfer per mile of corrugated pipe sewage heat exchanger is 5.2.times as much as that of the plastic-Al pipe,and it is 8.1 times as much as that of PP-R pipe.

关键词： corrugated pipe sewage heat exchanger sewage heat energy

Efficient degradation of dye pollutants using dioxygen mediated by iron(Ⅱ) 2.2.-bipyridine loaded layered clay catalyst under visible irradiation

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Science china Chemistry 2006年第5期49卷 407-410页

作者： CHENG Mingming1,SUN Zhenying1,2.MA Wanhong1,CHEN Chuncheng1,ZHAO Jincai1 & WANG Zhengping2.1. Laboratory of Photochemistry,Center for Molecular Science,institute of Chemistry,Chinese Academy of Sciences,Beijing 100080,china 2. {2. of Chemical engineering,harbin engineering University,harbin 150001,china 1. Laboratory of Photochemistry Center for Molecular Science Institute of Chemistry Chinese Academy of Sciences Beijing 100080 China 2. department of Chemical engineering Harbin Engineering University Harbin 150001 China

The organic-inorganic layered solid catalyst Fe(bpy)_3^(2.)-laponite was ableto photode-grade Rhodamine B (RhB) by activation of dioxygen under visible irradiation (λ > 42.nm), while the homogeneous aqueous solution Fe(bpy)_3^(2.) showed no photoactivity. The catalystcould be repeatedly used and retained its reactivity. The hybrid catalyst could be separated fromthe suspension by centrifugation or sedimentation. The TOC removal yield of RhB was *** oxygen species (ROS) formed during degradation was detected by EPR. A possible mechanismwas proposed on the basis of the experimental results.

关键词： laponite, Rhodamine B, molecular oxygen, visible light.