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First principles study on methane reforming over Ni/TiO2（110） surface in solid oxide fuel cells under dry and wet atmospheres

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Science China Materials 2020年第3期63卷 364-374页

作者： Wenqiang Yang Zhenbin Wang wenzhou tan Ranran Peng Xiaojun Wu Yalin Lu CAS Key Laboratory of Materials for Energy Conversion Department of Materials Science and EngineeringUniversity of Science and Technology of ChinaHefei 230026China Hefei National Laboratory of Physical Science at the Microscale University of Science and Technology of ChinaHefei 230026China Synergetic Innovation Center of Quantum Information&Quantum Physics University of Science and Technology of ChinaHefei 230026China

Understanding the carbon-tolerant mechanisms from a microscopic view is of special importance to develop proper anodes for solid oxide fuel *** this work,we employed density-functional theory calculations to study the CH4 reaction mechanism over a Ni/TiO2 nanostructure,which experimentally demonstrated good carbon *** potential pathways for methane reforming reactions were studied over the Ni/TiO2(110)surface under both dry and wet atmospheres,and the main concerns were focused on the impact of TiO2 and Ni/TiO2 interface on CO/H2 *** calculations suggest that the reaction between carbon and the interfacial lattice oxygen to form CO*is the dominant pathway for CH4 reforming under both dry and wet atmospheres,and intervention of steam directly to oxidize C*with its dissociated OH*group is less favorable in energy than that to wipe off oxygen vacancy to get ready for next C**** all investigated paths,desorption of CO*is one of the most difficult ***,CO*desorption can be greatly promoted by the large heat released from the previous CO*formation process under wet atmosphere.H2O adsorption and dissociation over the TiO2 surface are found to be much easier than those over Ni,yttria stabilized zirconia(YSZ)and CeO2,which should be the key reason for the greatly depressed carbon deposition over Ni-TiO2 particles than traditional YSZ-Ni and CeO2-Ni *** study presents the detailed CO*formation mechanism in CH4 reforming process over the Ni/TiO2 surface,which will benefit future research for exploring new carbon-tolerant solid oxide fuel cell anodes.

关键词： solid oxide fuel cells carbon tolerance methane reforming first principles

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近百年东亚登陆台风的长期振动

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热带气象 1986年第4期 343-348页

作者：汪铎陆叔鸣陈继芳张镡浙江师范学院江西省气象台温州市气象台北京大学

按不同地段统计分析了1884—1980年期间东亚登陆台风个数以偏多期与偏少期交替为特征的长期振动。发现东亚沿太平洋的多数地段上登陆台风数的长周期振动的主要周期为20年左右,较短周期的振动主要有5～6年和2～3年周期。不同地段上长期... 详细信息

按不同地段统计分析了1884—1980年期间东亚登陆台风个数以偏多期与偏少期交替为特征的长期振动。发现东亚沿太平洋的多数地段上登陆台风数的长周期振动的主要周期为20年左右,较短周期的振动主要有5～6年和2～3年周期。不同地段上长期振动的差异主要表现在周期、位相和振幅上。还发现登陆台风数的长期振动与春夏季节关键地区的大型气压环流的低频振动有某种关联。

关键词：登陆台风地段长期变化个数周期变化低频振动广东汕头东亚

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Sodium dimercaptopropane sulfonate as antidote against non-metallic pesticides

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Acta Pharmacologica Sinica 2004年第4期25卷 136-146页

作者： Zhi-kang CHEN, Zhong-qiu LU1,2 Department of Pharmacology, School of Pharmacy, wenzhou Medical College, wenzhou 325035 2Emergency Department, TheFirst Affiliated Hospital of wenzhou Medical College, wenzhou 325000, China Department of Pharmacology School of Pharmacy Wenzhou Medical College Wenzhou 325035

Sodium dimercaptopropane sulfonate is used in place of dimercaprol in the treatment of poisoning by heaving metals and metalloids as a well-known specific antidote. It is claimed to be less toxic. In early stage, the pharmacologists and clinical doctors in wenzhou Medical College found this drug as antidote against non-metallic pesticides as nereistoxin insecticides, Chlordimeform, bactercide 402, and tetramine. We did a lot of animal experiments and clinical trials to confirm that this antagonist possesses a strong antidotal effect. Now it is widely used in China. Great break through has been made not only in the theory but also in its practice. Furthermore, the combination use of this antidote and central anticonvulsant as diazepam indicated synergistic antidotal effect, which is probably the best utilization in the treatment of acute poisoning by tetramine.

关键词： sodium dimercaptopropane sulfonate antidotes pesticides nereistoxin insecticides chlordimeform bactericide 402 tetramine poisoning

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Research on novel multi-layer and multi-polarized slot-coupling planar antenna array

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Journal of Systems Engineering and Electronics 2009年第2期20卷 297-303页

作者： ZhangHou Wu wenzhou Wang Jian Missile Inst. of Air Force Engineering Univ. Sanyuan 713800 P. R. China

A novel multi-layer planar antenna array to achieve multi-polarized radiation is developed. U-shaped coupling slots are embedded in the ground plane to extend the bandwidth. The phase relation between adjacent elements in the radiation field is analyzed when adjacent elements are fed in opposite phase. Return loss and radiation pattern are measured for a 16-element antenna array at 12.5 GHz. The radiation pattern shows a good agreement with the calculated one in the shape of the main beam. The return-loss of the proposed antenna array is less than -20 dB in the 12.5 GHz frequency band （12.25-12.75 GHz）. Because of two feed ports the antenna can transmit arbitrary elliptic polarized waves if the two feed ports have different amplitude and phase. The main factors such as element spacing, substrate medium and manufacturing imperfection are analyzed and the corresponding conclusions are presented.

关键词： planar antenna multi-polarized slot-coupling cross polarization

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Achieving high strength and ductility in Fe_(50)Mn_(25)Ni_(10)Cr_(15) medium entropy alloy via Al alloying

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Journal of Materials Science & Technology 2022年第5期100卷 20-26页

作者： Zhen Jiang Ran Wei wenzhou Wang Mengjia Li Zhenhua Han Shuhan Yuan Kaisheng Zhang ChenChen tan Wang Fushan Li School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China Henan Shenhuo Coal&Power Co.Ltd Yongcheng 476600China School of Materials Science and Engineering Xi’an University of TechnologyXi’an 710048China

The microstructure and tensile properties of(Fe_(50)Mn_(25)Ni_(10)Cr_(15))_(100-x)Al_(x)(x=0-8 at.%)medium-entropy alloys(MEAs)were *** was found that the crystalline structure changes from face-centered cubic(FCC)single phase to FCC+body-centered cubic(BCC)dual-phase with the increase of Al ***,the addition of Al elements with large atomic size could induce solid solution strengthening and dual-phase heterogeneous structure ***,the present MEAs exhibit excellent combinations of yield strength,ultimate tensile strength(UTS)and ductility both at 298 and 77 *** the MEAs,the(Fe_(50)Mn_(25)Ni_(10)Cr_(15))_(95)Al_(5) alloy has a remarkable combination of cryogenic UTS(1077 MPa)and ductility(~85%),and has lower raw material costs than the reported high-entropy alloys(HEAs)and *** correlation among microstructure and mechanical properties and the corresponding strengthening mechanism were clarified.

关键词： Medium entropy alloys Microstructure Mechanical properties Cryogenic temperature

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Joint efficient ordering method for group multiobjective programming

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Progress in Natural Science:Materials International 2006年第1期16卷 90-95页

作者： HU Yuda and HU Didi (School of Mathematics and Information Science, wenzhou University, wenzhou 325035, China) School of Mathematics and Information Science Wenzhou University Wenzhou 325035 China

This paper introduces the concepts of individual efficient pair and group efficient pair for each alternative in group multi-objective programming, and corresponding to these concepts defines the concepts of individual joint efficient preference and group joint efficient preference, respectively. Based on the fundamental properties of the mapping from individual joint efficient preference to group joint efficient preference and group efficient number of alternative, a method of ordering alternatives for group multiobjective programming problems is given.

关键词： group multiobjective programming efficient pair joint efficient preference joint efficient mapping group efficient number.

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Decolourization of Reactive Brilliant Blue KN-R by immobilized cells of Aspergillus ficuum

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Journal of Environmental Sciences 2003年第3期15卷 377-382页

作者： DONG Xin-jiao, CHEN Zhu (Department of Biology & Environmental Science, wenzhou Normal College, wenzhou 325003, China.) Department of Biology & Environmental Science Wenzhou Normal College Wenzhou 325003

Aspergillus ficuum was immobilized with sodium alginate, and decolourization of Reactive Brilliant Blue KN-R was studied on immobilized and free Aspergillus ficuum. The optimal preparation condition of the strain immobilization was obtained by the orthogonal test, it is sodium alginate 3%, CaCl_2 5%, wet mycelia 30 g/L, calcific time 8 h. It was found that the immobilized cells could effectively decolourize Reactive Brilliant Blue KN-R, the optimum temperature and pH were 33℃ and 5.0, respectively. The kinetics study of decolourization of immobilized cells showed that the decolourization of Aspergillus ficuum immobilized conformed to zero-order reaction model. The decolourization efficiency of immobilized cell compared with that of free cell in different physical conditions. Results showed that the decolourization of immobilized cells with mycelia had the best efficiency. The immobilized cells could be reused after the first decolourization.

关键词： immobilized cell Reactive Brilliant Blue KN-R decolourization Aspergillus ficuum

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Personal experience with the procurement of 32 liver allografts

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World Journal of Gastroenterology 2005年第25期11卷 3939-3943页

作者： Guang-wenzhou Cheng-HongPeng Hong-WeiLi DepartmentofSurgery RuijinHospitalShanghaiSecondMedicalUniversityShanghai200025China

AIM: To introduce the American Pittsburgh's method of rapid liver procurement under the condition of brain death and factors influencing the quality of donor ***: To analyze 32 cases of allograft liver procurement retrospectively and observe the clinical outcome of orthotopic liver ***: Average age of donors was 38.24±12.78 years,with a male:female ratio of 23:9. The causes of brain death included 21 cases of trauma (65.63%) and nine cases of cerebrovascular accident (28.13%). Fourteen grafts (43.75%) had hepatic arterial anomalies, seven cases only right hepatic arterial anomalies (21.88%), five cases only left hepatic arterial anomalies (15.63%) and two cases of both right and left hepatic arterial anomalies (6.25%) among them. Eight cases (57.14%) of hepatic arterial anomalies required arterial reconstruction prior to transplantation. Of the 32 grafts evaluated for early function, 27 (84.38%) functioned well, whereas three (9.38%) functioned poorly and two (6.25%) failed to function at all. Only one recipient died after transplantation and thirty-one recipients recovered. Four recipients needed retransplantation. The variables associated with less than optimal function of the graft consisted of donor age (35.6±12.9 years vs 54.1±4.3 years, P＜0.05), duration of donor's stay in the intensive care unit (ICU) (3.5±2.4 d vs 7.4±2.1 d, P＜0.005), abnormal graft appearance (19.0% vs 100%, P＜0.05), and such recipient problems as vascular thromboses during or immediately following transplantation (89.3% vs 50.0%, P＜0.005).CONCLUSION: During liver procurement, complete heparization, perfusion in situ with localized low temperature and standard technique procedures are the basis ensuring the quality of the graft. The hepatic arterial anomalies should be taken care of to avoid injury. The donor age,duration of donor's staying in ICU, abnormal graft appearance and recipient problem are important factors influencing the quality of the liver graft.

关键词： Liver transplantation Liver procurement Donor Arterial anomalies

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The Synthesis of Gallic Esters of Higher Fatty Alcoholsunder Solvent-Free Conditions Using Microwave Irradiation

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Chinese Chemical Letters 1999年第11期10卷 915-916页

作者： Hai Xia LIN Li Xue Zhang Liang Shi CHENG(Department of Chemistry, wenzhou Normal College, wenzhou 325003) Department of Chemistry Wenzhou Normal College Wenzhou 325003 China

The reactions of gallic acid with higher fatty alcohols are acceterated by microwaves under solvent-free conditions in the presence of p-toluenesulfonic acid to afford a high yield synthesis of higher fatty alcohol ga... 详细信息

关键词： gallic ester Montmorillonite K 10 microwave irradiation

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Interface Electric Field Confinement Effect of High-Sensitivity Lateral Ge/Si Avalanche Photodiodes

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Tsinghua Science and Technology 2019年第1期24卷 1-8页

作者： wenzhou Wu Zhi Liu Jun Zheng Yuhua Zuo Buwen Cheng the State Key Laboratory on Integrated Optoelectronics Institute of Semiconductor Chinese Academy of Sciences the College of Materials Science and Opto-Electronic Technology University of Chinese Academy of Sciences

A novel lateral Ge/Si avalanche photodiode without a charge region is investigated herein using device physical simulation. High field is provided by the band-gap barrier and build-in field at the Ge/Si interface in the vertical direction. Modulating the Si mesa thickness(0-0.4 μm) and impurity concentration of the intrinsic Si substrate(1×10^(16)-4×10^(16)cm^(-3)) strengthens the electric field confinement in the substrate region and provides a high avalanche multiplication in the Si region. When the Si mesa thickness is 0.3 μm, and the impurity concentration of the Si substrate is 2×10^(16) cm^(-3), the Lateral Avalanche PhotoDiode(LAPD) exhibits a peak gain of 246 under 1.55 μm incident light power of -22.2 dBm, which increases with decreasing light intensity.

关键词： avalanche photodiodes lateral structure electric field confinement high gain

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