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A Novel Collision Supervision and Avoidance Algorithm for Scalable MAC of Vehicular Networks

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Chinese Journal of Electronics 2021年第1期30卷 164-170页

作者： wang Shuai LU Yan ZHU jie wang Ping School of Information Science and Technology Donghua University

In order to meet low-latency and ultra-reliable requirements on safety services in vehicular networks, this paper proposes a novel Collision supervision and avoidance(CSA) algorithm for the contention based scalable media access control protocol. The two-dimensional Markov chain model of adaptive backoff state transition criterion in CSA has been built, which could efficiently match the backoff states of nodes to the dynamic changes of vehicular networks. The scalable transmissions can be achieved through supervised trend and matching backoff mechanisms with three adaptive backoff *** packet transmit probabilities for the backoff modes have been derived with the theoretical result of the enhanced throughput. The simulation results show the remarkable scalability performance such as normalized throughput > 0.92, PDR > 86% and delay < 6.5 ms even in the high-density and high-mobility environment.

关键词： vehicular networks Markov processes access protocols scalable MAC remarkable scalability performance novel Collision supervision adaptive backoff modes CSA matching backoff mechanisms scalable transmissions scalable media access control protocol ultrareliable requirements two-dimensional Markov chain model probability time 6.5 ms safety services supervised trend avoidance algorithm state transition criterion

Online temperature estimation of Shell coal gasification process based on extended Kalman filter

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Chinese Journal of Chemical Engineering 2022年第7期35卷 134-144页

作者： Kangcheng wang jie Zhang Dexian Huang Department of Automation Beijing National Research Center for Information Science and TechnologyTsinghua UniversityBeijing 100084China School of Engineering Merz CourtNewcastle UniversityNewcastle upon Tyne NE17RUUnited Kingdom

Obtaining the temperature inside the gasifier of a Shell coal gasification process(SCGP)in real-time is very important for safe process ***,this temperature cannot be measured directly due to the harsh operating *** this temperature using the extended Kalman filter(EKF)based on a simplified mechanistic model is proposed in this *** gasifier is partitioned into three *** quench pipe and the transfer duct are seen as two additional zones.A simplified mechanistic model is developed in each zone and formulated as a state-space *** temperature in each zone is estimated by the EKF in *** proposed method is applied to an industrial SCGP and the effectiveness of the estimated temperatures is verified by a process variable both qualitatively and *** prediction capability of the simplified mechanistic model is *** effectiveness of the proposed method is further verified by comparing it to a Kalman filter-based single-zone temperature estimation method.

关键词： Shell coalgasificationprocess Mechanistic modeling Temperature estimation Extended Kalmanfilter

High-temperature oxidation behavior and degradation mechanism of chromium-coated zirconium alloy cladding: a review

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Tungsten 2025年第1期 50-70页

作者： Yi Li Bei-Qi wang Xin-Yin Zhang Shi-jie wang Cong-Yi Li Hui-Long Yang Ran-Ran Su Tong Liu School of Mechanical Engineering Shanghai Jiao Tong University College and Graduate School of Arts and Sciences University of Virginia Global Institute of Future Technology Shanghai Jiao Tong University

Accident-tolerant fuels(ATF) have been extensively studied to reduce the production rate and total amount of heat and hydrogen generated from high-temperature steam oxidation during severe ***-coated zirconium alloy cladding has become one of the most promising candidates for ATF because of its excellent corrosion and oxidation *** paper provides a comprehensive overview of the research progress on oxidation behaviors and degradation mechanisms in chromium-coated zirconium alloy cladding under high-temperature *** techniques to strengthen the oxidation resistance are highlighted and ***,challenges and opportunities for various future directions are addressed.

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Superhydrophobic and mechanically robust polysiloxane composite coatings containing modified silica nanoparticles and PS-grafted halloysite nanotubes

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Chinese Journal of Chemical Engineering 2022年第12期52卷 56-65页

作者： jie wang Ling Zhang Chunzhong Li Key Laboratory for Ultrafine Materials of Ministry of Education Shanghai Engineering Research Center of Hierarchical NanomaterialsFrontiers Science Center for Materiobiology and Dynamic ChemistrySchool of Materials Science and EngineeringEast China University of Science&TechnologyShanghai 200237China

Excellent mechanical properties are the prerequisite for the application of superhydrophobic polymer ***,significantly improving the mechanical properties without affecting other properties such as hydrophobicity is a huge *** this study,a superhydrophobic coating with excellent mechanical properties was prepared by spraying a mixture of polysiloxane resins based on three siloxane monomers,hexadecyltrimethoxysilane(HDTMS) modified nano-SiO_(2)particles(SiO_(2)-HDTMS) and polystyrene-grafted halloysite nanotubes(HNTs-PS).SiO_(2)-HDTMS dispersed homogeneously in polysiloxane coatings and the water contact angle of corresponding coating exceeding 150°,achieving *** SiO_(2)-HDTMS/HNTs-PS/polysiloxane composite coatings showed excellent abrasion resistance with the water coating contact angle remaining above 150°after 90 abrasion cycles,indicating that HNTs-PS can significantly improve the mechanical properties of the coating without affecting the hydrophobic properties of the *** achieved coating also exhibited excellent antifouling and acid and alkali corrosion *** work provides a convenient and ecologically friendly method to prepare superhydrophobic polysiloxane composite coating with excellent mechanical properties,which is promising in the application of anti-fouling,anti-corrosion,and oil-water separation etc.

关键词： Polysiloxane Superhydrophobic coating Mechanical properties

A Novel Text Retrieval Algorithm for Public Crisis Cases

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Chinese Journal of Electronics 2019年第4期28卷 712-717页

作者： PENG Yan wang jie JIAO Lulin School of Management Capital Normal University

Public crisis has the characteristics of suddenness and uncertainty, and it is necessary to combine the knowledge with the experience of other similar situations to make decisions effectively and *** work combines artificial intelligent theory with information technology and brings case-based reasoning to build models consisting of the features of public crisis. We explore the case-representation approach and build a case-based retrieval algorithm. Combining the specificness of Case-based reasoning(CBR) technology in the monitoring of public crisis events, a new case retrieval algorithm for public crisis cases, named as Combined multi-similarity with set of simi-larity matching algorithm based on sememe(CMSBS), is proposed to analyze the cases with high similarity to current *** CMSBS algorithm considers the structural and semantic similarities between two public crisis cases comprehensively. Simulation experiments are performed to validate the representation method of the knowledge,and the simulation results demonstrate that the CMSBS algorithm has superior performance in the average number of matching cases and matching accuracy rate and can work well in providing reference cases for subsequent events.

关键词： Knowledge representation Case retrieval Public crisis Case-based reasoning

Experimental study on combustion characteristics of supersonic combustor based on alternating-wedge strut

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Chinese Journal of Aeronautics 2024年第5期37卷 214-227页

作者： jie LI Wenyan SONG Yuhang wang School of Power Energy Northwestern Polytechnical UniversityXi’an 710129China

Acetone Planar Lase-Induced Fluorescence(PLIF)and OH-PLIF were employed to capture the fuel distribution and OH distribution downstream for the supersonic combustor based on the alternating-wedge *** combustion establishment process and combustion mode in the combustor under different fuel injection methods and different equivalence ratios were *** with the kerosene-PLIF and OH-PLIF results in the cavity combustor,a comparative analysis was conducted to understand the combustion characteristics and combustion modes between the alternating-wedge strut-based combustor and the cavity-based *** results show that the combustor is in weak combustion mode in the case of low equivalence ratio,and the combustor is in intensive combustion mode in the case of high equivalence *** lower limit of the equivalence ratio of the combustor to maintain the intensive combustion mode varies based on different fuel injection *** OH distribution under reacting condition has a strong correlation with the fuel distribution under non-reacting *** OH fluorescence signal near the injector is weaker when the fuel distribution is more *** injector position located at the base of the strut rear has better mixing performance,enabling the combustor to be in intensive combustion mode at a lower equivalence *** combustion reaction in the alternating-wedge strut-based combustor is not necessarily dominated by mass transfer due to the mixing enhancement and premixed zone downstream of strut,while the combustion reaction process in the cavity-based combustor is mainly influenced by mass transfer.

关键词： Supersonic combustor Alternating-wedge strut Cavity PLIF Fuel injection Fuel distribution Combustion characteristics Combustion mode

China’s high-resolution optical remote sensing satellites and their mapping applications

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Geo-Spatial Information Science 2021年第1期24卷 85-94,I0011页

作者： Deren Li Mi wang jie Jiang State Key Laboratory of Information Engineering in Surveying Mapping and Remote SensingWuhan UniversityWuhanChina School of Geomatics and Urban Spatial Informatics Beijing University of Civil Engineer and ArchitectureBeijingChina

Since the beginning of the twenty-first century,several countries have made great efforts to develop space remote sensing for building a high-resolution earth observation *** the great attention of the government and the guidance of the major scientific and technological project of the high-resolution earth observation system,China has made continuous breakthroughs and progress in high-resolution remote sensing imaging *** development of domestic high-resolution remote sensing satellites shows a vigorous trend,and consequently,a relatively stable and perfect high-resolution earth observation system has been *** development of high-resolution remote sensing satellites has greatly promoted and enriched modern mapping technologies and *** this paper,the development status,along with mapping modes and applications of China’s high-resolution remote sensing satellites are reviewed,and the development trend in high-resolution earth observation system for global and ground control-free mapping is discussed,providing a reference for the subsequent development of high-resolution remote sensing satellites in China.

关键词： High-resolution optical remote sensing satellite satellite constellation mapping mode global mapping

Twin-roll strip casting of advanced metallic materials

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Science China(Technological Sciences) 2022年第3期65卷 493-518页

作者： ZHU ChenYang ZENG jie wang WanLin School of Metallurgy and Environment Central South UniversityChangsha 410083China National Center for International Research of Clean Metallurgy Central South UniversityChangsha 410083China Department of Materials Science and Engineering Faculty of EngineeringNational University of SingaporeSingapore 117576Singapore

Metallic materials have historic and served as critical enablers of human progress,wealth,and wellbeing over ***,the global demand for the development of environment-friendly and energy-saving technology has been increasing,with the aim to support the sustainability of metallic ***-roll strip casting(TRC)is one of the most cutting-edge technologies and a near-net-shape manufacturing method in the steel industry,which conforms to the green fabrication trend of next-generation high-performance metallic *** utilizing the dominant characteristics of sub-rapid solidification,and integration of solidification,solid-state transformation,and deformation;TRC has become a meaningful way to deal with the most challenging issues in the processing of metallic materials,and made a significant contribution to materials ***,we review the TRC process of various metallic materials,including plain carbon steels,stainless steels,Fe-Si electrical steels,high-strength steels,clad steels,aluminum alloys,magnesium alloys,metallic glasses,and so *** paper offers an outlook of future opportunities for various advanced metallic materials development through the TRC process,and inspires more in-depth research.

关键词： twin-roll strip casting metallic materials steels alloys

Connectivity-maintaining Consensus of Multi-agent Systems With Communication Management Based on Predictive Control Strategy

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IEEE/CAA Journal of Automatica Sinica 2023年第3期10卷 700-710页

作者： jie wang Shaoyuan Li Yuanyuan Zou Key Laboratory of System Control and Information Processing Shanghai Jiao Tong UniversityShanghai 200240China IEEE

This paper studies the connectivity-maintaining consensus of multi-agent *** the impact of the sensing ranges of agents for connectivity and communication energy consumption,a novel communication management strategy is proposed for multi-agent systems so that the connectivity of the system can be maintained and the communication energy can be *** this paper,communication management means a strategy about how the sensing ranges of agents are adjusted in the process of reaching *** proposed communication management in this paper is not coupled with controller but only imposes a constraint for controller,so there is more freedom to develop an appropriate control strategy for achieving *** the multi-agent systems with this novel communication management,a predictive control based strategy is developed for achieving *** results indicate the effectiveness and advantages of our scheme.

关键词： Consensus energy-saving multi-agent system predictive control