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Ammonia pyrolysis oxidation excited by nanosecond pulsed discharge:Global/fluid models hybrid solution

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Journal of Energy Chemistry 2025年第1期100卷 385-396页

作者： Mingming Zhang Hanyu wu Qi Chen Jiaxin Yang Bonan Liu School of Mechanical Electronic and Control Engineering Beijing Jiaotong University China University of Petroleum

The kinetic characteristics of plasma-assisted oxidative pyrolysis of ammonia are studied by using the global/fluid models hybrid solution ***,the stable products of plasma-assisted oxidative pyrolysis of ammonia are *** results show that the consumption of NH3/O2and the production of N2/H2change linearly with the increase of voltage,which indicates the decoupling of nonequilibrium molecular excitation and oxidative pyrolysis of ammonia at low ***,the detailed reaction kinetics mechanism of ammonia oxidative pyrolysis stimulated by a nanosecond pulse voltage at low pressure and room temperature is *** on the reaction path analysis,the simplified mechanism is *** detailed and simplified mechanism simulation results are compared with experimental data to verify the accuracy of the simplified ***,based on the simplified mechanism,the fluid model of ammonia oxidative pyrolysis stimulated by the nanosecond pulse plasma is established to study the pre-sheath/sheath behavior and the resultant consumption and formation of key *** results show that the generation,development,and propagation of the pre-sheath have a great influence on the formation and consumption of *** consumption of NH3by the cathode pre-sheath is greater than that by the anode pre-sheath,but the opposite is true for OH and O（1S）.However,within the sheath,almost all reactions do not ***,by changing the parameters of nanosecond pulse power supply voltage,it is found that the electron number density,electron current density,and applied peak voltages are not the direct reasons for the structural changes of the sheath and ***,the discharge interval has little effect on the sheath structure and gas mixture *** research results of this paper not only help to understand the kinetic promotion of non-equilibrium excitation in the process of oxidative pyrolysis but also help to explore th

关键词： Nanosecond pulsed discharge Ammonia Oxidative pyrolysis Fluid model Global model

2006—2016年宜昌市城区突发公共卫生事件特征分析

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公共卫生与预防医学 2018年第2期29卷 97-99页

作者：田滔滔张慧琦吴周志赵鑫湖北省宜昌市疾病预防控制中心湖北宜昌433000

目的了解宜昌市城区突发公共卫生事件的发生特征,为有效预防和处置突发公共卫生事件提供科学依据。方法应用描述性流行病学方法对2006—2016年宜昌市城区网报突发公共卫生事件数据进行统计分析。结果 2006—2016年宜昌市城区共报告突发... 详细信息

目的了解宜昌市城区突发公共卫生事件的发生特征,为有效预防和处置突发公共卫生事件提供科学依据。方法应用描述性流行病学方法对2006—2016年宜昌市城区网报突发公共卫生事件数据进行统计分析。结果 2006—2016年宜昌市城区共报告突发公共卫生事件78起,累计发病数1 625例,死亡4例,无重大或较大事件发生,事件类型主要是CO中毒、水痘、流感及流感样病例事件。传染病事件主要发生在3~5月和9~11月,中毒事件主要发生在12月~次年3月;56.41%的事件发生在学校,学校事件中95.45%为传染病事件;非职业性CO中毒事件的危害最大;88.46%的事件由基层级综合医疗机构报告;事件报告的时间越晚,事件持续的时间越长(r=0.548,P<0.001)。结论宜昌市城区突发公共卫生事件主要为学校呼吸道传染病事件,应进一步规范突发公共卫生事件的监测与报告,加强学校卫生管理工作,加强城郊及农村地区的安全管理。

关键词：公共卫生突发事件特征

Axial compression tests and numerical simulation of steel reinforced recycled concrete short columns confined by carbon fiber reinforced plastics strips

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Frontiers of Structural and Civil Engineering 2022年第7期16卷 817-842页

作者： Hui MA Fangda LIU Yanan wu xin A Yanli zhao State Key Laboratory of Eco-hydraulics in Northwest Arid Region Xi’an University of TechnologyXi’an 710048China School of Civil Engineering and Architecture Xi’an University of TechnologyXi’an 710048China Qinghai Building and Materials Research Co. LtdXining 810008China Qinghai Provincial Key Laboratory of Plateau Green Building and Eco-community Xining 810008China

To research the axial compression behavior of steel reinforced recycled concrete(SRRC)short columns confined by carbon fiber reinforced plastics(CFRP)strips,nine scaled specimens of SRRC short columns were fabricated and tested under axial compression ***,the failure process and failure modes were observed,and load-displacement curves as well as the strain of various materials were *** effects on the substitution percentage of recycled coarse aggregate(RCA),width of CFRP strips,spacing of CFRP strips and strength of recycled aggregate concrete(RAC)on the axial compression properties of columns were also analyzed in the experimental ***,the finite element model of columns which can consider the adverse influence of RCA and the constraint effect of CFRP strips was founded by ABAQUS software and the nonlinear parameter analysis of columns was also implemented in this *** results show that the first to reach the yield state was the profile steel in the columns,then the longitudinal rebars and stirrups yielded successively,and finally RAC was crushed as well as the CFRP strips was also *** replacement rate of RCA has little effect on the columns,and with the substitution rate of RCA from 0 to 100%,the bearing capacity of columns decreased by only 4.8%.Increasing the CFRP strips width or decreasing the CFRP strips spacing could enhance the axial bearing capacity of columns,the maximum increase was 10.5%or 11.4%,and the ductility of columns was significantly ***,CFRP strips are conducive to enhance the axial bearing capacity and deformation capacity of *** this basis,considering the restraint effect of CFRP strips and the adverse effects of RCA,the revised formulas for calculating the axial bearing capacity of SRRC short columns confined by CFRP strips were proposed.

关键词： steel reinforced recycled concrete CFRP strips short columns axial compression behavior recycled aggregate concrete

Application of PCR-DGGE in Research of Bacterial Diversity in Drinking Water

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Biomedical and Environmental Sciences 2006年第5期19卷 371-374页

作者： QING wu xin-HUA zhao SHENG-YUE zhao Department of Environmental Science and Engineering Tianjin University Tianjin 300072 China

Objective To analyze the structure of bacteria in drinking water by molecular biological techniques, Methods DNA of bacteria in drinking water was directly extracted without culture. 16S ribosomal DNA fragments, including V-6, -7, and -8 regions, were amplified with universal primers （EUBf933CJC and EUBr1387） and analyzed by DGGE. Results DGGE indicated that amplification products could be separated, The results showed that DGGE could be used in the separation of different microbial 16SrRNA genes extracted from drinkng water. Though there were special bacteria in different water samples, the predominant bacteria were essentially the same. Three sequences of the reclaimed specific bands were obtained, and phylogenetic tree of these bands was made. Conclusion Bacterial diversity in drinking water is identified by molecular biological techniques.

关键词： Drinking water Denaturing gradient gel electrophoresis (DGGE) 16S ribosome RNA Microbial diversity

Two open-source projects for image aesthetic quality assessment

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Science China(Information Sciences) 2019年第2期62卷 198-199页

作者： Le wu xin JIN Geng zhao xinghui ZHOU Beijing Electronic Science and Technology Institute State Key Laboratory of Cryptology

Here we introduce two open-source projects for image aesthetic quality assessment. The first one is ILGnet, an open-source project for the aesthetic evaluation of images based on the convolution neural network. The se... 详细信息

关键词： AVA Two open-source projects for image aesthetic quality assessment PED

Synthesis of CdS multipods from cadmium xanthate in ethylenediamine solution

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Particuology 2015年第2期13卷 45-52页

作者： Qiaofeng Han Jin zhao Lei wu Junwu Zhu xin Wang Key Laboratory for Soft Chemistry and Functional Materials Ministry of EducationNanjing University of Science and Technology

CdS nanocrystals of various shapes were synthesized by using cadmium ethyldithiocarbonatio （xanthate） as a single precursor under solvothermal condition. The reaction temperature, cadmium concentration, and solvents determine the CdS morphology. Multipodal CdS structures of different fractions of all particles were obtained at temperatures ranging from 100 to 180 ℃ with the corresponding precursor concentrations in ethylenediamine （EDA） solution. This approach is different from that reported in the literature, where EDA is regarded as a solvent favorable to the formation ofCdS nanorods instead of pods. Uniform CdS multipods were prepared at 160 ℃ with 1.0 g of cadmium xanthate. The formation of CdS multipods in EDA solution may be attributed to a synergistic effect between the reaction temperature and Cd concentration, i.e., thermodynamically and kinetically controlled growth of the CdS wurtzite （WZ） and zinc blende （ZB） phases, as confirmed by the structural characterization of the component CdS crys- tals. EDA and xanthate ligands act as co-assisted capping agents in the growth of CdS multipods. When using N,N-dimethylformamide （DMF） and ethylene glycol （EG） as solvents, the CdS appears as triangular particles and flower-like microspheres assembled by polyhedrons, respectively.

关键词： Nanostructurecl materials Chemical synthesis Microstructure Transmission electron microscopy

奇异值分解(SVD)在位场数据去噪中的应用

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世界地质 2016年第4期35卷 1119-1126页

作者：邢琮琮吴燕冈赵昕赵国兴李朝辉孙帮民吉林大学地球探测科学与技术学院长春130026

根据奇异值分解原理,分析其在位场去噪中的可行性,提出了一种判断有效阶次k的方法。对多边形厚板模型的重力异常进行奇异值分解去噪和小波去噪效果的对比,证明了奇异值分解去噪的有效性和优势。将其应用于实测重力数据的处理中,取得较... 详细信息

根据奇异值分解原理,分析其在位场去噪中的可行性,提出了一种判断有效阶次k的方法。对多边形厚板模型的重力异常进行奇异值分解去噪和小波去噪效果的对比,证明了奇异值分解去噪的有效性和优势。将其应用于实测重力数据的处理中,取得较好的效果。理论模型和实测资料的处理结果表明:基于奇异值分解的去噪方法可以有效地去除随机噪声,提高数据处理和解释的精度。

关键词：奇异值 SVD 去噪重力资料

NIR photothermal enhancement to achieve high-efficiency nitrogen reduction to ammonia by polyoxometalates@Fe-polydopamine

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Nano Research 2025年第1期18卷 118-128页

作者： Xiaofei Chen Lixin wu Feng Bai Key Laboratory for Special Functional Materials of Ministry of Education National&Local Joint Engineering Research Center for High-Efficiency Display and Lighting TechnologySchool of Nanoscience and Materials EngineeringHenan UniversityKaifeng 475004China State Key Laboratory of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchun 130012China

The development of atmospheric pressure N_(2)reduction to NH_(3)is attracting much attention in green chemistry,yet it is still a challenge to obtain satisfactory activity under mild ***,an efficient near-infrared(NIR)photothermal catalysis reduction of N_(2)constitutes an occurrence is *** or without V-substitute polyoxometalates(POMs)loaded on the surface of Fechelated polydopamine(Fe-PDA)photothermal support through the electrostatic interactions,NIR photothermal catalysts POMs@Fe-PDA are *** induction of“FeV”cofactor facilitates electron transfer between V(V)/V(IV)&Fe(III)/Fe(II)and N_(2),thereby activating N_(2)*** synergy between the catalytic activity of V-POMs and the local NIR photothermal effect of Fe-PDA dramatically enhances N_(2)***,PMo_(10)V_(2)@Fe-PDA exhibits a significantly enhanced NH_(3)production rate of 181.1μmol·LN^(-1)with a turnover frequency of 1006.1 mmol·MN^(-1)·hN^(-1)under 808 nm NIR laser radiation,being the highest values reported at atmospheric *** expect that this work could provide an alternative approach for photothermal catalysis N_(2)reduction under mild conditions.

关键词： polyoxometalate near-infrared photothermal catalysis N_(2)reduction mild condition

Evolutionary Computation in Social Propagation over Complex Networks: A Survey

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International Journal of Automation and computing 2021年第4期18卷 503-520页

作者： Tian-Fang zhao Wei-Neng Chen xin-xin Ma Xiao-Kun wu School of Computer Science&Engineering South China University of TechnologyGuangzhou 510006China School of Journalism and Communication South China University of TechnologyGuangzhou 510006China

Social propagation denotes the spread phenomena directly correlated to the human world and society, which includes but is not limited to the diffusion of human epidemics, human-made malicious viruses, fake news, social innovation, viral marketing, etc. Simulation and optimization are two major themes in social propagation, where network-based simulation helps to analyze and understand the social contagion, and problem-oriented optimization is devoted to contain or improve the infection results. Though there have been many models and optimization techniques, the matter of concern is that the increasing complexity and scales of propagation processes continuously refresh the former conclusions. Recently, evolutionary computation(EC) shows its potential in alleviating the concerns by introducing an evolving and developing perspective. With this insight, this paper intends to develop a comprehensive view of how EC takes effect in social propagation. Taxonomy is provided for classifying the propagation problems, and the applications of EC in solving these problems are reviewed. Furthermore, some open issues of social propagation and the potential applications of EC are *** paper contributes to recognizing the problems in application-oriented EC design and paves the way for the development of evolving propagation dynamics.

关键词： Evolutionary computation complex network propagation dynamics social diffusion evolution model optimization algorithm