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Method of transforming resistance gene to carbendazim into Trichoderma sp.

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Chinese Science Bulletin 1999年第1期44卷 65-68页

作者： YANG Qian ZHAO XiaoyanCollege of Forestry, Northeast Forestry university, harbin 150040, china harbin Veterinary Institute, harbin 150040, china College of Forestry Northeast Forestry University Harbin China harbin Veterinary Institute Harbin China

The method of transforming resistance gene to carbendazim into Trichoderma sp. was studied by using genetic engineering technique. The results show that the time of fungicide selection on the transformed Trichoderma sp. may have very important effect on the resistance gene transformation. By this method, the resistance gene to carbendazim was transformed into Trichoderma harzianum, a strain of T. harzianum with resistance to carbendazim was achieved. The transformant could grow on the medium containing 150μg/mL carbendazim. The resistance is stable after 10 times transfer on non-selective medium.

关键词： gene of resistance to carbendazim gene transformation Trichoderma sp.

ON THE RHEOLOGICAL MODEL OF STEELS AT ELEVATED TEMPERATURES

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Acta Metallurgica Sinica(English Letters) 1992年第11期5卷 364-369页

作者： XU Dong Shanghai Jiaotong university,Shanghai,chinaAN Geying LI Qingchun harbin Institute of Technology,harbin,china Shanghai Jiaotong Univ Shanghai China

Mechanical properties of steels ZG15CrMoV and 35 in the temperature range of 500 to 1400℃ have been experimently researched by means of *** experi- mental results is used as input-output responses,a rhelological model with five elements of the mechanical behaviour of steels ZG15CrMoV and 35 at elevated temperatures, i.e[M]=[H_1]-[H_2/[N_2]-[S/N_3],is determined by a system identification method,and the parameters of the model in the temperature range are also identified.

关键词： steel ZG15CrMoV steel 35 rheological model system identification

ON MATRIX UNITARILY INVARIANT NORM CONDITION NUMBER

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Journal of Computational mathematics 1998年第2期16卷 121-128页

作者： Dao-sheng Zheng (Department of mathematics, East china normal university, Shanghai 200062, china) E china normal Univ Dept Math Shanghai 200062 Peoples R China

In this paper, the unitarily invariant norm \\.\\ on C-mxn is used. We first discuss the problem under what case, a rectangular matrix A has minimum condition number K(A) = \\A\\ \\A(+)\\, where A(+) designates the Moore-Penrose inverse of A; and under what condition, a square matrix A has minimum condition number for its eigenproblem? Then we consider the second problem, i.e., optimum of K(A) = \\A\\ \\A(-1)\\(2) in error estimation.

关键词： matrix unitarily invariant norm condition number

Several Sufficient Conditions for Class I

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Journal of Systems Science and Systems Engineering 2001年第1期13卷 117-120页

作者： LI Xiao dong1, Wang Yu wen2 1.harbin Institute, harbin 150086, china 2.harbin normal university, harbin 150080, china harbin Institute Harbin 150086 China harbin normal university Harbin 150080 China

：Several sufficient conditions for Class I are given in this paper.

关键词： graph theory chromatic index edge colourings

Superprocesses arising from interactive stochastic flows

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Science china mathematics 2006年第4期49卷 451-476页

作者： YAN Guojun & LI Zhanbing Medical school, Shantou university, Shantou 515063, china Department of mathematics, Bejing normal university, Beijing 100875, china Medical school Shantou University Shantou 515063 China Department of mathematics Bejing Normal University Beijing 100875 China

In this paper, we give a unified construction for superprocesses with dependent spatial motion constructed by Dawson, Li, Wang and superprocesses of stochastic flows constructed by Ma and Xiang. Furthermore, we also g... 详细信息

关键词： superprocess, interactive stochastic flows, martingale problem, dual processes.

Three-dimensional configurations of organic/inorganic hybrid nanostructural blocks (I).A quantum mechanical investigation for ladder-like structure of vinylsilsesquioxane

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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 Institute 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 Institute 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 29Si) 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)/2n). 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.

On characterizations of isometries on function spaces

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Science china mathematics 2008年第4期51卷 620-631页

作者： LI SongYing~(1+) RUAN YingBin~2 1 Department of mathematics university of California Irvine CA 92697 USA 2 school of mathematics and Computer Science Fujian normal university Fuzhou 350007 china 1. Department of mathematics University of California Irvine CA 92697 USA 2. school of mathematics and Computer Science Fujian Normal University Fuzhou 350007 China

The paper gives characterization for an isometric isomorphism on little Bloch space, VMOA and holomorphic Besov space over the unit ball B n in ? n .

关键词： ismometry Besov spaces 32A17 47A15

Degradation of anthracene, pyrene and benzo[a]-anthracene in aqueous solution by chlorine dioxide

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Science china Chemistry 2006年第6期49卷 565-572页

作者： LIU Jinquan1, HUANG Junli1, SU Liqiang2, CAO Xiangyu1 & JI Ying1 1. school of Municipal and Environmental Engineering, harbin Institute of Technology, harbin 150090, china 2. school of Chemistry and Chemical Engineering, Qiqihar university, Qiqihar 161006, china 1. school of Municipal and Environmental Engineering Harbin Institute of Technology Harbin 150090 China 2. school of Chemistry and Chemical Engineering Qiqihar University Qiqihar 161006 China

Polycyclic aromatic hydrocarbons (PAHs) constitute an important group of micropollutants, which are known to be mutagenic, carcinogenic and/or co-carcinogenic and relatively persistent in the environment. The effects of chlorine dioxide (ClO2) on the degradation of anthracene (ANTH), pyrene (PYR) and benzo[a]anthracene (BaA) in aqueous solution were investigated using high performance liquid chromatography (HPLC). In preliminary experiments, it was observed that ClO2 could remove these three PAHs effectively within a short time. Several factors including reaction time, the concentration of ClO2 and pH of the reaction mixture influencing the degradation ratio of PAHs have been studied by batch experiments. The results showed that the degradation ratio of PAHs was affected by reaction time and the concentration of ClO2 instead of pH. The degradation ratio of ANTH, PYR and BaA could reach their maximum as approximately 99.0%, 67.5% and 89.5%, respectively, under the condition as follows: reaction time 30, 60 and 120 min, the concentration of ClO2 0.1, 0.4 and 0.5 mmol·L-1, and pH 7.2. ANTH was selected as the representative to study the reaction mechanism with ClO2. The oxidation products formed in the reaction of ANTH with ClO2 were tentatively identified by gas chromatography-mass spectrometry (GC-MS), and the results showed that the main product was 9, 10-anthraquinone, which could be biodegraded more easily and quickly than ANTH. Through analyzing the reaction properties of ANTH and ClO2, the possible pathway for the ANTH-ClO2 reaction was proposed based on the theory of single electron transfer (SET).

关键词： chlorine dioxide, anthracene, pyrene, benzo[a]anthracene, degradation, reaction mechanism.

Dynamic and Seismic Property Experiments of High Damping Concrete and Its Frame Models

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Journal of Wuhan university of Technology(Materials Science) 2008年第1期23卷 1-6页

作者：欧进萍刘铁军 LI Jilong Shenzhen Graduate school of harbin Institute of Technology Shenzhen 518055 China school of Civil ＆ Hydraulic Engineering Dalian University of Technology Dalian 116024 China school of Civil Engineering Harbin Institute of Technology Harbin 150006 China

The loss tangent and storage modulus of cement mortar containing treated silica fume and styrene-acrylic are measured. Shaking table tests on three groups of 1/4 models of high damping concrete frames are conducted to compare the effects of reducing vibration. A relationship between the viscosity coefficient of high damping concrete and the damping coefficient of structure is established by analyzing dynamic parameters like damping ratio and frequency, and comparing responses of relative displacement and absolute acceleration. Surface treatment of silica fume and styrene-acrylic emulsion prior to incorporation in a cement mortar increases the loss tangent of the resulting composite by 40-400% as compared to the cement mortar without any admixtures, and the damping ratio of the reinforced concrete is raised by 7%-9%. In addition, a theoretical method of determining the viscosity coefficient of the material on the basis of shaking table test results is put forward.

关键词： high damping concrete damping relationship seismic experiment surface modification viscosity coefficient