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Intelligent decision support platform of new energy vehicles

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Journal of Systems Engineering and Electronics 2022年第4期33卷 785-791页

作者： wang Zhenpo SUN zhenyu LIU Peng wang Shuo ZHANG Zhaosheng Collaborative Innovation Center for Electric Vehicles&National Engineering Laboratory for Electric Vehicles Beijing Institute of TechnologyBeijing 100081China Chongqing Innovation Center Beijing Institute of TechnologyChongqing 401135China

New energy vehicles(NEVs) are gaining wider acceptance as the transportation sector is developing more environmentally friendly and sustainable technology. To solve problems of complex application scenarios and multi-sources heterogenous data for new energy vehicles and weak platform scalability,the framework of an intelligent decision support platform is proposed in this paper. The principle of software and hardware system is introduced. Hadoop is adopted as the software system architecture of the platform. Master-standby redundancy and dual-line redundancy ensure the reliability of the hardware system. In addition, the applications on the intelligent decision support platform in usage patterns recognition, energy consumption, battery state of health and battery safety analysis are also described.

关键词： new energy vehicle(NEV) intelligent decision support platform software system data platform application

Will polycentric cities cause more CO2 emissions? A case study of 232 Chinese cities

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Journal of Environmental Sciences 2020年第10期32卷 33-43页

作者： Wei Sha ying Chen Jiansheng Wu zhenyu wang Key Laboratory for Urban Habitat Environmental Science and Technology School of Urban Planning and DesignPeking UniversityShenzhen 518055China Laboratory for Earth Surface Processes Ministry of EducationCollege of Urban and Environmental SciencesPeking UniversityBeijing 100871China

From 2000 to 2010 China experienced rapid economic development and *** cities in economically developed areas have developed from a single-center status to *** this study,we used exploratory spatial data analysis (ESDA) to identify the population centers,which identified 232 cities in China as having urban *** was used to represent urban agglomeration,and POLYD (representing how far is the city’s sub-centers to the main center),POLYC (representing the number of a city’s centers),and POLYP (representing the population distributed between the main center and the sub-centers) were used to indicate urban *** light data were used to determine the CO2 emissions from various cities in China.A mixed model was used to study the impact of urban aggregation and polycentric data on the CO2 emission efficiency in 2000 and *** study found that cities with higher compactness were distributed in coastal areas,and the cities with higher multicentricity were distributed in the Yangtze River Delta and Shandong *** more compact the city was,the less conducive it was to improving CO2 emission *** development of the city was conducive to improving the CO2 emission efficiency,but the number of urban centers had no significant relationship with the CO2 emission *** research showed that the compactness and multicentricity of the city had an impact on the CO2 emission efficiency and provided some planning suggestions for the low carbon development of the city.

关键词： CO_2 emission efficiency polycentricity compactness Chinese cities

Artificial Intelligence Applications in the Development of Autonomous Vehicles:A Survey

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IEEE/CAA Journal of Automatica Sinica 2020年第2期7卷 315-329页

作者： Yifang Ma zhenyu wang Hong Yang Lin Yang Department of Information Technology and Decision Sciences Old Dominion UniversityNorfolkVA 23529 USA Department of Computational Modeling and Simulation Engineering Old Dominion UniversityNorfolkVA 23529 USA Department of Mechanical and Electrical Engineering Huazhong Agricultural UniversityWuhan 430070China

The advancement of artificial intelligence(AI)has truly stimulated the development and deployment of autonomous vehicles(AVs)in the transportation *** by big data from various sensing devices and advanced computing resources,AI has become an essential component of AVs for perceiving the surrounding environment and making appropriate decision in *** achieve goal of full automation(i.e.,self-driving),it is important to know how AI works in AV *** research have made great efforts in investigating different aspects of applying AI in AV ***,few studies have offered the research community a thorough examination of current practices in implementing AI in ***,this paper aims to shorten the gap by providing a comprehensive survey of key studies in this research ***,it intends to analyze their use of AIs in supporting the primary applications in AVs:1)perception;2)localization and mapping;and 3)decision *** investigates the current practices to understand how AI can be used and what are the challenges and issues associated with their *** on the exploration of current practices and technology advances,this paper further provides insights into potential opportunities regarding the use of AI in conjunction with other emerging technologies:1)high definition maps,big data,and high performance computing;2)augmented reality(AR)/virtual reality(VR)enhanced simulation platform;and 3)5G communication for connected *** paper is expected to offer a quick reference for researchers interested in understanding the use of AI in AV research.

关键词： Artificial intelligence(AI) autonomous vehicles(AVs) deep learning(DL) motion planning perception self-driving

Boron based hypergolic ionic liquids:A review

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Green Energy & Environment 2021年第6期6卷 794-822页

作者： zhenyu Zhang Zirui Zhao Binshen wang Jiaheng Zhang State Key Laboratory of Advanced Welding and Joining Harbin Institute of TechnologyShenzhen518055China Research Centre of Printed Flexible Electronics School of Materials Science and EngineeringHarbin Institute of TechnologyShenzhen518055China

The advance of space technology is deeply affected by the breakthrough of high-performance *** ionic liquids(HILs)are one of the most potential fuels for bipropellant ***,high viscosity value and low specific impulse of traditional N-based HILs limit their ***,boron-based HILs with low viscosity become the new candidates,and their derivatives are also found to promote the hypergolicity as additives in ***,the synthesis,physical chemical properties and thermal performance of boron-based HILs and HILadditive system are reviewed.

关键词： Ionic liquids Hypergolic fuels Boron-based compounds

An Approach to Stability Analysis of Embedded Large-Diameter Cylinder Quay

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China Ocean Engineering 2002年第3期17卷 383-393页

作者： wang Yuanzhan(王元战) ZHU zhenyu(祝振宇) Department of Port and Coastal Engineering Tianjin University Tianjin 300072 China Department of Port and Coastal Engineering Tianjin University Tianjin 300072 China

The large-diameter cylinder structure, which is made of large successive bottomless cylinders placed on foundation bed or partly driven into soil, is a recently developed retaining structure in China. It can be used in port, coastal and offshore works. The method for stability analysis of the large-diameter cylinder structure, especially for stability analysis of the embedded large-diameter cylinder structure, is an important issue. In this paper, an idea is presented that is, embedded large-diameter cylinder quays can be divided into two types, i.e. the gravity wall type and the cylinder pile wall type. A method for stability analysis of the large-diameter cylinder quay of the cylinder pile wall type is developed and a method for stability analysis of the large-diameter cylinder quay of the gravity wall type is also proposed. The effect of significant parameters on the stability of the large-diameter cylinder quay of the cylinder pile wall type is investigated through numerical calculation.

关键词： large-diameter cylinder quay cylinder pile wall stability analysis

Seed traits and taxonomic relationships determine the occurrence of mutualisms versus seed predation in a tropical forest rodent and seed dispersal system

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Integrative Zoology 2014年第3期9卷 309-319页

作者： zhenyu wang Lin CAO Zhibin ZHANG State Key Laboratory of Integrated Management of Pest Insects and Rodents in Agriculture Institute of ZoologyChinese Academy of SciencesBeijingChina University of Chinese Academy of Sciences BeijingChina

Although many studies have been carried out on plant-animal mutualistic assemblages,the roles of functional traits and taxonomy in determining both whether interactions involve mutualisms or predation and the structure of such assemblages are *** used semi-natural enclosures to quantitatively assess the interaction strengths between seeds of 8 sympatric tree species and 4 rodent species in a tropical forest in Xishuangbanna,Yunnan,Southwest *** found 2 clusters of species in the seed-rodent network represented by 2 genera in the Fagaceae(Castanopsis,Lithocarpus).Compared to seeds of 3 Castanopsis species,seeds with heavy weight,hard coat or caloric content(including 3 Lithocarpus species)were eaten less and more frequently hoarded by *** turn,hoarded seeds showed less predation and more mutualism with *** results suggest that seed traits significantly affected the hoarding behavior of rodents,and,consequently,the occurrence of mutualisms and predation as well as assemblage structure in the plant-animal seed dispersal ***nomically-related species with similar seed traits as functional groups belong to the same substructures in the *** results indicate that both seed traits and taxonomic relationships may simplify thinking about seed dispersal systems by helping to elucidate whether interactions are likely to be dominated by predation or mutualism.

关键词： hoarding behavior mutualism predation seed dispersal seed trait

Dynamic Fracture Analysis for Shale Material by Peridynamic Modelling

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Computer Modeling in Engineering & Sciences 2019年第3期118卷 509-527页

作者： Zhanqi Cheng zhenyu wang Zhongtao Luo School of Civil Engineering Zhengzhou UniversityZhengzhou450001China School of Material Science and Engineering Zhengzhou UniversityZhengzhou450001China

In this work,a bond-based peridynamics(PD)model was built to analyze the dynamic fracture of shale *** the the convergence studies and the result of dynamic crack propagation were *** well-known,crack propagation,aggregation,and bifurcation play an critical role in the failure analysis of brittle materials such as *** dynamic crack propagation and branching analysis of shale by using the PD method were ***,the valid and accuracy of the PD model for the rock materials was verified by comparing with the existed numerical ***,we discussed the convergence both with uniform grid refinement(m-convergence)and decreasing the peridynamics horizon(δ-convergence).Then the shale material with two pre-crack under uniaxial compression using the present PD model were discussed,and the influence of the different angle of flaws on the behavior of crack propagation was also *** results shows that both the loading conditions and the angle of flaws can influences the crack propagation in shale.

关键词： Peridynamics shale dynamic fracture crack propagation dynamic loads

Ultrafast Manipulation of Transient Energy Transfer Between Surface Plasmons and Resonators in Hybrid Nano-coupling System

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Chemical Research in Chinese Universities 2016年第5期32卷 797-802页

作者： YUE Yuanyuan ZHANG zhenyu wang Haiyu State Key Laboratory on Integrated Optoelectronics College of Electronic Science and Engineering Jilin University Changchun 130012 P. R. China

Surface-plasmon（SP） modes triggered on metal nanostructures were strongly coupled to the local restricted electronmagnetic field supported by a Fabry-Perot（F-P） cavity. This hybrid system provided an ideal platform to study the interaction between SP and F-P resonators on nanoscales. However, the time-resolved transient energy transfer process is far from resolved. In this letter, we addressed this question by time-resolved femtosecond pump-probe technology and readily observed the transient energy transfer between SP and nanocavity resonant ener- gy. The interaction resulted in the emergence of hybrid splitting mode and the oscillating dynamics between upper and lower polariton branch（the split hybrid states）. Our work may provide a well comprehension of strong coupling between SP modes and F-P resonator modes, and lay some groundwork for many future photonic applications.

关键词： Energy transfer Surface-plasmon Nano-coupling system Strong coupling Time-resolved femtosecond pump-probe technology

Calibration of microwave network analyzer

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Science China(Technological Sciences) 2004年第2期47卷 141-149页

作者： ZHU Ninghua wang Youlin CHEN zhenyu The State Key Laboratory on Integrated Optoelectronics Institute of Semiconductors Chinese Academy of Sciences Beijing 100083 China The State Key Laboratory on Integrated Optoelectronics Institute of Semiconductors Chinese Academy of Sciences Beijing 100083 China The State Key Laboratory on Integrated Optoelectronics Institute of Semiconductors Chinese Academy of Sciences Beijing 100083 China

This paper presents a systematic description of the methods for calibrating microwave network analyzer and test fixtures, and discusses the problems arising in the calibration. The general criteria for choosing calibration standards and corresponding algorithms are discussed and suggestions to overcome these problems and improve the calibration accuracy are also given. It has been found that for reciprocal test fixtures, the four equations obtained with the thru standard can be used at the same time. Meanwhile,the calibration accuracy can be improved. It has been shown that using the same calibration procedures but different algorithms may lead to the occurrence of frequency limitation.

关键词： calibration, microwave network analyzer, scattering parameter measurement, test fixture.