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A COMPREhENSIVE INVESTIGATION ON A PECULIAR DEFECT IN WURTZITE GaN FILM

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Acta Metallurgica Sinica(English Letters) 1999年第4期12卷 327-333页

作者： S.q.Wang1 ,2) and h.q.Ye1) 1) Laboratory of Atomic Imaging of Solids,Institute of Metal Research , The Chinese Academy of Sciences, Shenyang 110015 ,China 2)Department of Materials Science and Metallurgy , University of Cambridge, Cambridge CB2 3qZ, UK

Apeculiar crystal defect was observed by experiment of high resolution electron microscopy( hREM) .It wasidentifiedtoformed bytwothreading dislocationsand asegmentof(11 20) domain boundary. An atomicstructure model was proposed for the anomalous defect. Theresultofthe weak beam experimentofelectron microscopeaffirmedthesuggested *** GaN(11 2 0) domain boundaries werestudied by Molec ular Dynamicscalculations. Thetheoreticalresultsshowedthatthelike atom bonding domain boundary, whichcomposesthe main partofthe peculiar defect, has much higher formationenergy than itcounterpartof unlike atom bonding domain boundary. Theoutcome providesanotherevidenceforthesuggested model.

关键词： hREM weak beam electron microscopy crystal defect Wurtzite GaN molecular dynamics

Optimization of process parameters for preparation of powdered activated coke to achieve maximum SO_(2)adsorption using response surface methodology

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Frontiers in Energy 2021年第1期15卷 159-169页

作者： Binxuan ZhOU Tao WANG Tianming XU cheng LI Yuan ZhAO Jiapeng FU Zhen ZhANG Zhanlong SONG Chunyuan MA National Engineering Laboratory for Reducing Emissions from Coal Combustion Engineering Research Center of Environmental Thermal Technology of the Ministry of Education Shandong Key Laboratory of Energy Carbon Reduction and Resource Utilization School of Energy and Power Engineering Shandong UniversityJinan 250061China School of Electric Power North China University of Water Resources and Electric PowerZhengzhou 450045China

Powdered activated coke(PAC)is a good adsorbent of SO_(2),but its adsorption capacity is affected by many factors in the preparation *** prepare the PAC with a high SO_(2)adsorption capacity using JJ-coal under flue gas atmosphere,six parameters(oxygen-coal equivalent ratio,reaction temperature,reaction time,O_(2)concentration,CO_(2)concentration,and h_(2)O concentration)were screened and optimized using the response surface methodology(RSM).The results of factor screening experiment show that reaction temperature,O_(2)concentration,and h_(2)O(g)concentration are the significant ***,a quadratic polynomial regression model between the significant factors and SO_(2)adsorption capacity was established using the central composite design(CCD).The model optimization results indicate that when reaction temperature is 904.74℃,O_(2)concentration is 4.67%,h_(2)O concentration is 27.98%,the PAC(PAC-OP)prepared had a higher SO_(2)adsorption capacity of 68.15 mg/g while its SO_(2)adsorption capacity from a validation experiment is 68.82 mg/g,and the error with the optimal value is 0.98%.Compared to two typical commercial activated cokes(ACs),PAC-OP has relatively more developed pore structures,and its SBET and Vtot are 349 m^(2)/g and 0.1475 cm3/g,significantly higher than the 186 m^(2)/g and 0.1041 cm3/g of AC1,and the 132 m^(2)/g and 0.0768 cm3/g of ***,it also has abundant oxygen-containing functional groups,its surface O content being 12.09%,higher than the 10.42%of AC1 and 10.49%of ***,the SO_(2)adsorption capacity of PAC-OP is also significantly higher than that of both AC1 and AC2,which is 68.82 mg/g versus 32.53 mg/g and 24.79 mg/g,respectively.

关键词： powdered activated coke(PAC) S0_(2)adsorption capacity parameters optimization response surface methodology

Civil-military Integration Equipment Research and Comparative Manufacturing

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Civil-military Integration Equipment Research and Comparativ...

Sheng-Mai-San attenuates contractile dysfunction and structural damage induced by chronic intermittent hypoxia in mice

International Conference on Industrial Technology and Management Science(ITMS 2015)

作者： J.q.Zhao F.LIANG h.W.Bai Company of Postgraduate Management the Academy of Equipment Department of Equipment Acquisition the Academy of Equipment

The development of civil-military integration is not only the national strategic deployment, but also the only way to speed up the transformation of the mode of generating combat capabilities. The distribution of resources is the core of civil-military integration development and the key of civil-military integration construction effect. This paper mainly applies comparative advantage theory to analyze the superiority of military enterprises and private enterprises on equipment research and production in order to realize the optimization of resource distribution.

关键词： Comparative Advantage Civil-Military Integration the Distribution of Resources

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Chinese Journal of Natural Medicines 2015年第10期13卷 743-750页

作者： MO Wei-Lan ChAI cheng-Zhi KOU Jun-Ping YAN Yong-qing YU Bo-Yang Department of Complex Prescription of TCM China Pharmaceutical University Jiangsu Provincial Key Laboratory for TCM Evaluation and Translational Research China Pharmaceutical University

Sheng-Mai-San(SMS), a well-known Chinese medicinal plant formula, is widely used for the treatment of cardiac diseases characterized by deficiency of qi and Yin syndrome. A mouse chronic intermittent hypoxia(CIh) model was established to mimic the primary clinical features of deficiency of qi and Yin syndrome. Mice experienced CIh for 28 days(nadir 7% to peak 8% oxygen, 20 min per day), resulting in left ventricle(LV) dysfunction and structure abnormalities. After administration of SMS(0.55, 1.1, and 5.5 g·kg-1·d-1) for four weeks, improved cardiac function was observed, as indicated by the increase in the ejection fraction from the LV on echocardiography. SMS also preserved the structural integrity of the LV against eccentric hypotrophy, tissue vacuolization, and mitochondrial injury as measured by histology, electron microscopy, and ultrasound assessments. Mechanistically, the antioxidant effects of SMS were demonstrated; SMS was able to suppress mitochondrial apoptosis as indicated by the reduction of several pro-apoptotic factors(Bax, cytochrome c, and cleaved caspase-3) and up-regulation of the anti-apoptosis factor Bcl-2. In conclusion, these results demonstrate that SMS treatment can protect the structure and function of the LV and that the protective effects of this formula are associated with the regulation of the mitochondrial apoptosis pathway.

关键词： Sheng-Mai-San Chronic intermittent hypoxia Contractile dysfunction Left ventricle Mitochondrial apoptosis

Syntheses and Crystal Structures of Two New α-Aminophosphonate Derivatives Containing Thieno[2,3-d]pyrimidine

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Chinese Journal of Structural Chemistry 2015年第6期34卷 879-884页

作者： ZhU Xi-Feng GUO Yan-Chun YU Zhi-Ran LIAO Xin-cheng ZhAO Yu-Fen The College of Chemistry and Molecular Engineering The Key Laboratory of Chemical Biology and Organic Chemistry of Henan Province Zhengzhou University Department of Chemistry College of Chemistry and Chemical Engineering The Key Laboratory for Chemical Biology of Fujian Province Xiamen University

Two new a-aminophosphonate derivatives containing thieno[2,3-d]pyrimidine, diethyl（（（6-ethyl-2-methyl-4-oxothieno[2,3-d]pyrimidin-3 （4h）-yl）amino）（4-methoxyphenyl）methyl） phosphonate （1） and diethyl（（4-bromophenyl）（（6-ethyl-2-methyl-4-oxothieno[2,3-d]pyrimidin-3 （4//）-yl）amino）methyl）phosphonate （2）, have been synthesized by a facial phosphorylated reaction, and their structures were characterized by NMR, IR, hRMS and X-ray single-crystal diffraction. Compound 1 （C21h28N3O5PS, Mr = 465.49） belongs to the orthorhombic system, space group P212121, with a = 10.83653（16）, b = 12.04906（19）, c = 18.0061（3） A, V= 2351.06（6） A3, Z= 4, Dc= 1.315 g/cm3, p = 2.177 mm-1, F（000） = 984.0, the final R = 0.0389 and wR = 0.0985 for all data. Compound 2 （C20h25BrN304PS, Mr = 514.37） belongs to the orthorhombic system, space group P212121, with a = 10.9187（5）, b = 11.9522（4）, c = 17.7667（7） A, V= 2318.60（16） A3, Z = 4, Dc= 1.474 g/cm3,μ = 4.175 mm^-1, F（000） = 1056.0, the final R = 0.0367 and wR = 0.0946 for all data.

关键词： thieno[2,3-d]pyrimidine a-aminophosphonate derivatives synthesis crystal structure

UV/h2O2 oxidation of tri(2-chloroethyl) phosphate: Intermediate products, degradation pathway and toxicity evaluation

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Journal of Environmental Sciences 2020年第12期32卷 55-61页

作者： qiuyi Ji huan he Zhanqi Gao Xiaohan Wang Shaogui Yang cheng Sun Shiyin Li Yong Wang Limin Zhang School of Environment Nanjing Normal UniversityNanjing 210023China State Environmental Protection Key Laboratory of Monitoring and Analysis for Organic Pollutants in Surface Water Environment Monitoring Center of JiangsuNanjing 210036China State Key Laboratory of Pollution Control and Resources Reuse School of EnvironmentNanjing UniversityNanjing 210023China School of Environment Northeast Normal UniversityChangchun 130024China

Tri(2-chloroethyl) phosphate(TCEP) with the initial concentration of 5 mg/L was degraded by UV/h2O2 oxidation process. The removal rate of TCEP in the UV/h2O2 system was 89.1% with the production of Cl-and PO4^3- of 0.23 and 0.64 mg/L. The removal rate of total organic carbon of the reaction was 48.8% and the ph reached 3.3 after the reaction. The oxidative degradation process of TCEP in the UV/h2O2 system obeyed the first order kinetic reaction with the apparent rate constant of 0.0025 min^-1( R^2 = 0.9788). The intermediate products were isolated and identified by gas chromatography-mass spectrometer. The addition reaction of hO · and h2O and the oxidation reaction with h2O2 were found during the degradation pathway of 5 mg/L TCEP in the UV/h2O2 system. For the first time, environment risk was estimated via the "ecological structure activity relationships" program and acute and chronic toxicity changes of intermediate products were pointed out. The luminescence inhibition rate of photobacterium was used to evaluate the acute toxicity of intermediate products. The results showed that the toxicity of the intermediate products increased with the increase of reaction time, which may be due to the production of chlorine compounds. Some measures should be introduced to the UV/h2O2 system to remove the highly toxic Cl-containing compounds, such as a nanofiltration or reverse osmosis unit.

关键词： Tri(2-chloroethyl)phosphate(TCEP) UV/h2O2 Mechanisms Toxicity evaluation

Fabrication of poly(vinylidene fluoride) membrane via thermally induced phase separation using ionic liquid as green diluent

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Chinese Journal of Chemical Engineering 2020年第5期28卷 1415-1423页

作者： Xiaozu Wang Xiaogang Li Juan Yue Yangming cheng Ke Xu qian Wang Fan Fan Zhaohui Wang Zhaoliang Cui State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 210009China Jiangsu National Synergetic Innovation Center for Advanced Materials(SICAM) Nanjing Tech UniversityNanjing 210009China National Engineering Research Center for Special Separation Membrane Nanjing Tech UniversityNanjing 210009China

Ionic liquid(IL),1-butyl-3-methylimidazolium hexafluorophosphate([BMIM]PF6)as a new and environmentally friendly diluent was introduced to prepare poly(vinylidene fluoride)(PVDF)membranes via thermally induced phase separation(TIPS).Phase diagram of PVDF/[BMIM]PF6 was *** effects of polymer concentration and quenching temperature on the morphologies,properties,and performances of the PVDF membranes were *** the polymer concentration was 15 wt%,the pure water flux of the fabricated membrane was up to nearly 2000 L·m-2·h-1,along with adequate mechanical *** the increasing of PVDF concentration and quenching temperature,mean pore size and water permeability of the membrane *** results showed that PVDF membranes manufactured by ionic liquid(BMIm PF6)presented spherulite *** the PVDF membranes were represented asβphase by XRD and FTIR *** provides a new way to prepare PVDF membranes with piezoelectric properties.

关键词： Ionic liquid Poly(vinylidene fluoride)membrane Thermally induced phase separation

Negative specific heat,phase transition and particles spilling from a potential well

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Negative specific heat,phase transition and particles spilli...

Design and Integration of On-line Mobile Robots

2007“与统计有关的凝聚态物理中一些数值计算问题”研讨会

作者： J.Rao,q.h.Liu and T.G.Liu

引言纳米团簇中负比热的成功观测[1]使得有限体系中的统计物理日益成为一个研究热点。通常认为,负比热出现的原因在于体系的能量将不再是一个广延量,子系统之间的相互

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Design and Integration of On-line Mobile Robots