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Direct growth of ZnO nanowires on civil engineering materials:smart materials for supported photodegradation

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Microsystems & Nanoengineering 2019年第1期5卷 70-76页

作者： Marie Le Pivert Romain Poupart Martine Capochichi-Gnambodoe Nathan Martin yamin Leprince-Wang UniversitéParis-Est ESYCOM(CNRS-FRE2028)UPEM5 Boulevard Descartes77420 Champs sur MarneFrance

Photocatalysis is one of the most promising processes for treating air and water *** civil engineering materials for environmental depollution by photocatalysis have already been synthesized by incorporating TiO_(2) or ZnO nanoparticles in *** method suffers from two flaws:first,most of the NPs are incorporated into the cement and useless for photocatalysis;second,rain and wind could spread the potentially carcinogenic nanoparticles from the cement surface into ***,we propose the efficient synthesis of nontoxic and biocompatible ZnO nanostructures solely onto the surface of commercially available concrete and tiling pavements by a low-cost and lowtemperature hydrothermal *** samples exhibited enhanced photocatalytic activity for degrading organic dyes in aqueous media,and dye molecules are commonly used in the pharmaceutical,food,and textile *** studies showed no loss of efficiency after four photocatalysis *** supported structures,which are easy to implement onto the varying surfaces of commercially available materials,are promising for integration into civil engineering surfaces for environmental depollution in our daily life.

关键词： nanowires nanoparticles cement

Automatic Web Services Composition Based on SLM

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Wuhan University Journal of Natural Sciences 2008年第4期13卷 425-428页

作者： ZHANG Peiyun HUANG Bo SUN yamin School of Mathematics and Computer Anhui Normal University Wuhu 241000 Anhui China School of Computer Science and Technology Nanjing University of Science and Technology Nanjing 210094 JiangsuChina

Motivated by the problem of simplifying the manual operation of the composition process, we propose an approach to automatically compose available Web services to fulfill user＇s goal based on the assumption that there are a set of alternative Web services with similar functionality and different QoS properties. A formal model （i.e. semantic links matrix, SLM for short ） is proposed to store semantic links values for the Web services with semantic relationship and QoS of Web services. The SLM provides a search place for a backward-search planning algorithm, at the same time; the QoS criteria make a rational and effective decision among a number of similar Web services. The function and some properties of the algorithm are analyzed. The approach can improve the correctness and flexibility for Web services composition and satisfy the local QoS attribute.

关键词： Web service semantic links matrix QoS back-ward-search planning

Flexible Ag Microparticle/MXene-Based Film for Energy Harvesting

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Nano-Micro Letters 2021年第12期13卷 235-246页

作者： Yunpeng Jia yamin Pan Chunfeng Wang Chuntai Liu Changyu Shen Caofeng Pan Zhanhu Guo Xianhu Liu College of Materials Science and Engineering Key Laboratory of Advanced Material Processing&Mold(Ministry of Education)National Engineering Research Center for Advanced Polymer Processing TechnologyZhengzhou UniversityZhengzhou 450002People’s Republic of China National Center for Nanoscience and Technology(NCNST) Beijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 100083People’s Republic of China College of Physics and Optoelectronic Engineering Shenzhen UniversityShenzhen 518060People’s Republic of China Integrated Composites Laboratory Department of Chemical&Biomolecular EngineeringUniversity of TennesseeKnoxvilleTN 37996USA

Ultra-thin flexible films have attracted wide attention because of their excellent ductility and potential *** particular,the energy-harvesting films(EHFs)have become a research hotspot because of the indispensability of power source in various ***,the design and fabrication of such films that can capture or transform di erent types of energy from environments for multiple usages remains a ***,the multifunctional flexible EHFs with e ective electro-/photo-thermal abilities are proposed by successive spraying Ag microparticles and MXene suspension between on waterborne polyurethane films,supplemented by a *** optimal coherent film exhibits a high electrical conductivity(1.17×10^(4)S m^(-1)),excellent Joule heating performance(121.3℃)at 2 V,and outstanding photo-thermal performance(66.2℃ within 70 s under 100 mW cm^(-1)).In addition,the EHFs-based single-electrode triboelectric nanogenerators(TENG)give short-circuit transferred charge of 38.9 nC,open circuit voltage of 114.7 V,and short circuit current of 0.82μ*** interestingly,the output voltage of TENG can be further increased via constructing the double triboelectrification *** comprehensive ability for harvesting various energies of the EHFs promises their potential to satisfy the corresponding requirements.

关键词： Energy harvesting MXene Ag microparticle Triboelectric nanogenerator

Photoelectrochemical Biosensor for 5-Formylcytosine Based on WS_(2)/Bi/Bi_(2)O_(2)CO_(3) Nanocomposite and Rolling Circle Amplification

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Chinese Journal of Chemistry 2022年第2期40卷 247-255页

作者： Qian Wang Huanshun Yin Yunlei Zhou Lulu Cao Zhengkun Yu yamin Xu Shiyun Ai College of Chemistry and Material Science Food Safety Analysis and Test Engineering Technology Research Center of Shandong ProvinceShandong Agricultural UniversityTaianShandong 271018China

As a key epigenetic modification,5-formylcytosine(5fC)controls many important cell functions,such as gene expression and cell ***,5fC exists in mammalian tissues and cells with low content,and its structure is highly similar to 5-methylcytosine(5mC),5-hydroxymethylcytosine(5hmC)and 5-carboxycytosine(5caC), which requires the detection method for detecti ng 5fC with high sensitivity and *** this experiment,WS_(2)/Bi/Bi_(2)O_(2)CO_(3) was used as the photoactive material,5fC antibody was used as the target molecule recog nition reage nt,and rolling amplification(RCA)was employed as the signal amplification strategy to con struct a no vel photoelectrochemical biose nsor for detecti ng 5-formylcytosi ne deox ynu cleotide(SfdCTP).

关键词： Semicon ductors Photoelectrochemistry Biosensor Epigenetic modification Toxicology

THE EXISTENCE OF WEAK SOLUTIONS AND PROPAGATION REGULARITY FOR A GENERALIZED KDV SYSTEM

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Acta Mathematica Scientia 2023年第2期43卷 942-958页

作者：郭柏灵肖亚敏 Institute of Applied Physics and Computational Mathematics Beijing 100088China The Graduate School of China Academy of Engineering Physics Beijing 100088China

This paper examines the existence of weak solutions to a class of the high-order Korteweg-de Vries(KdV)system in *** first prove,by the Leray-Schauder principle and the vanishing viscosity method,that any initial data N-dimensional vector value function u0(x)in Sobolev space H^(s)(R^(n))(s≥1)leads to a global weak ***,we investigate some special regularity properties of solutions to the initial value problem associated with the KdV type system in R^(2)and R^(3).

关键词： global existence propagation regularity KdV system

A two-stage optimization method for unmanned aerial vehicle inspection of an oil and gas pipeline network

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Petroleum Science 2019年第2期16卷 458-468页

作者： yamin Yan Yongtu Liang Haoran Zhang Wan Zhang Huixia Feng Bohong Wang Qi Liao Beijing Key Laboratory of Urban Oil and Gas Distribution Technology China University of Petroleum-Beijing

Oil and gas pipeline networks are a key link in the coordinated development of oil and gas both upstream and *** improve the reliability and safety of the oil and gas pipeline network, inspections are implemented to minimize the risk of leakage, spill and theft, as well as documenting actual incidents. In recent years, unmanned aerial vehicles have been recognized as a promising option for inspection due to their high efficiency. However, the integrated optimization of unmanned aerial vehicle inspection for oil and gas pipeline networks, including physical feasibility, the performance of mission, cooperation, real-time implementation and three-dimensional(3-D) space, is a strategic problem due to its large-scale,complexity as well as the need for efficiency. In this work, a novel mixed-integer nonlinear programming model is proposed that takes into account the constraints of the mission scenario and the safety performance of unmanned aerial vehicles. To minimize the total length of the inspection path, the model is solved by a two-stage solution method. Finally, a virtual pipeline network and a practical pipeline network are set as two examples to demonstrate the performance of the optimization schemes. Moreover, compared with the traditional genetic algorithm and simulated annealing algorithm, the self-adaptive genetic simulated annealing algorithm proposed in this paper provides strong stability.

关键词： Pipeline network Unmanned aerial vehicle inspection Mixed-integer nonlinear programming Two-stage solution

A 2D covalent organic framework with ultra-large interlayer distance as high-rate anode material for lithium-ion batteries

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Nano Research 2022年第11期15卷 9779-9784页

作者： Manman Wu Yang Zhao Hongtao Zhang Jie Zhu Yanfeng Ma Chenxi Li yamin Zhang Yongsheng Chen The Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer Materials Institute of Polymer ChemistryCollege of ChemistryNankai UniversityTianjin 300071China State Key Laboratory of Elemento-Organic Chemistry Nankai UniversityTianjin 300071China Renewable Energy Conversion and Storage Center(RECAST) Nankai UniversityTianjin 300071China State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical EngineeringLanzhou UniversityLanzhou 730000China

Covalent organic frameworks(COFs)have been broadly investigated for energy storage ***,many COF-based anode materials suffer from low utilization of redox-active sites and sluggish ions/electrons transport caused by their densely stacked ***,it is still a great challenge to obtain COF-based anode materials with fast ions/electrons transport and thus superior rate ***,a redox-active piperazine-terephthalaldehyde(PA-TA)COF with ultra-large interlayer distance is designed and synthesized for high-rate anode material,which contains piperazine units adopting a chair-shaped conformation with the nonplanar linkages of a tetrahedral *** unique structure renders PA-TA COF an ultra-large interlayer distance of 6.2Å,and further enables it to achieve outstanding rate and cycling *** a high specific capacity of 543 mAh·g^(−1) even after 400 cycles at 1.0 A·g^(−1),it still could afford a specific capacity of 207 mAh·g^(−1) even at a high current density of 5.0 A·g^(−1).Our study indicates that expanding the interlayer distance of COFs by rational molecular design would be of great importance to develop high-rate electrode materials for lithium-ion batteries.

关键词： lithium-ion batteries high-rate anode material covalent organic frameworks ultra-large interlayer distance

Enhanced Coyote Optimization with Deep Learning Based Cloud-Intrusion Detection System

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Computers, Materials & Continua 2023年第2期74卷 4319-4336页

作者： Abdullah M.Basahel Mohammad yamin Sulafah M.Basahel E.Laxmi Lydia Faculty of Economics and Administration King Abdulaziz UniversityJeddahSaudi Arabia E-commerce Department College of Administrative and Financial SciencesSaudi Electronic UniversityJeddahSaudi Arabia Department of Computer Science and Engineering Vignan’s Institute of Information TechnologyVisakhapatnam530049India

Cloud Computing(CC)is the preference of all information technology(IT)organizations as it offers pay-per-use based and flexible services to its *** the privacy and security become the main hindrances in its achievement due to distributed and open architecture that is prone to *** Detection System(IDS)refers to one of the commonly utilized system for detecting attacks on *** proves to be an effective and promising technique,that identifies malicious activities and known threats by observing traffic data in computers,and warnings are given when such threatswere *** current mainstream IDS are assisted with machine learning(ML)but have issues of low detection rates and demanded wide feature *** article devises an Enhanced Coyote Optimization with Deep Learning based Intrusion Detection System for Cloud Security(ECODL-IDSCS)*** ECODL-IDSCS model initially addresses the class imbalance data problem by the use of Adaptive Synthetic(ADASYN)*** detecting and classification of intrusions,long short term memory(LSTM)model is *** addition,ECO algorithm is derived to optimally fine tune the hyperparameters related to the LSTM model to enhance its detection efficiency in the cloud *** the presented ECODL-IDSCS model is tested on benchmark dataset,the experimental results show the promising performance of the ECODL-IDSCS model over the existing IDS models.

关键词： Intrusion detection system cloud security coyote optimization algorithm class imbalance data deep learning

Effects of 1 MeV electron radiation on the AlGaN/GaN high electron mobility transistors

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Journal of Semiconductors 2024年第9期45卷 70-75页

作者： Shijie Pan Shiwei Feng Xuan Li Zixuan Feng Xiaozhuang Lu Kun Bai yamin Zhang College of Microelectronics Beijing University of TechnologyBeijing 100124China Institute of Microelectronics Chinese Academy of SciencesBeijing 100029China

In this study, the effects of 1 MeV electron radiation on the D-mode GaN-based high electron mobility transistors(HEMTs) were investigated after different radiation doses. The changes in electrical properties of the device were obtained, and the related physical mechanisms were analyzed. It indicated that under the radiation dose of 5 × 10^(14) cm^(-2), the channel current cannot be completely pinched off even if the negative gate voltage was lower than the threshold voltage, and the gate leakage current increased significantly. The emission microscopy and scanning electron microscopy were used to determine the damage location. Besides, the radiation dose was adjusted ranging from 5 × 10^(12) to 1 × 10^(14) cm^(-2), and we noticed that the drain-source current increased and the threshold voltage presented slightly negative shift. By calculations, it suggested that the carrier density and electron mobility gradually increased. It provided a reference for the development of device radiation reinforcement technology.

关键词： AlGaN/GaN HEMT electron radiation performance degradation device damage