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Engine universal characteristic modeling based on improved ant colony optimization

International Journal of Agricultural and Biological Engineering 2015年第5期8卷 26-35页

作者： chen fuen Jiang Shihui Xie Xin chen Longhan Lan Yubin School of Electronic and Information Engineering Beijing Jiaotong UniversityBeijing 100044China Department of Mechanical Engineering Oakland UniversityRochesterMI 48309USA College of Engineering South China Agricultural UniversityGuangzhou 510642China

There have been some mathematics methods to model farm vehicle engine universal characteristic mapping(EUCM).Nevertheless,any of different mathematics methods used would possess its own strengths and *** a result,these modeling methods about EUCM are not the same among the most vehicle *** order to obtain a better robustness EUCM,an improved ant colony optimization was introduced into a traditional cubic surface regression method for modeling *** on this method,the test data were regressed into a three-dimensional cubic surface,after that it was cut by some equal specific fuel consumption(ESFC)planes,more than twenty two-dimensional ESFC equations were ***,the engine speed in every ESFC equation was discretized to obtain a set of ESFC points,and this set of ESFC points was linked into a closed curve by a given sequence via the improved ant colony *** order to improve the modeling speed,dimensionality reduction and discretization methods were *** addition,a corresponding simulation platform was also developed to obtain an optimal system *** were 48000 simulation search tests carried out on the platform,and the major parameters of the algorithm were *** this way the EUCM was established *** contrast with other methods,as a result of the application of the novel bionic intelligent algorithm,it has better robustness,less distortion and higher calculating speed,and it is available for both gasoline engines and diesel engines.

关键词： engines universal characteristics improved ant colony algorithm genetic algorithm cubic surface regression

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Novel method for real-time detection and tracking of pig body and its different parts

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International Journal of Agricultural and Biological Engineering 2020年第6期13卷 144-149页

作者： fuen chen Xiaoming Liang Longhan chen Baoyuan Liu Yubin Lan School of Electronic and Information Engineering Beijing Jiaotong UniversityBeijing 100044China Department of Mechanical Engineering Oakland UniversityRochesterMI 48309USA School of electronics and electrical engineering Beijing Jiaotong University Haibin CollegeHuanghua 061199HebeiChina College of Engineering South China Agricultural UniversityGuangzhou 510642China

Detection and tracking of all major parts of pig body could be more productive to help to analyze pig *** achieve this goal,a real-time algorithm based on You Only Look At CoefficienTs(YOLACT)was proposed.A pig body was divided into ten parts:one head,one trunk,four thighs and four *** the key points of each part were calculated by the novel algorithm,which was based mainly on combination of the Zhang-Suen thinning algorithm and Gravity *** experiment results showed that these parts of pig body could be detected and tracked,and their contributions to overall pig activity could also be sought *** detect accuracy of the algorithm in the data set could reach up to 90%,and the processing speed to 30.5 ***,the algorithm was robust and adaptive.

关键词： computer vision CNN pig YOLACT detection and tracking

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Test bed for farm vehicle onboard hydrogen production system with microwave plasma

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International Journal of Agricultural and Biological Engineering 2016年第6期9卷 65-74页

作者： chen fuen chen Longhan Xie Xin Li Xiang Yubin Lan School of Electronic and Information Engineering Beijing Jiaotong UniversityBeijing 100044China Department of Mechanical Engineering Oakland UniversityMI48309USA College of Engineering South China Agricultural UniversityGuangzhou510642China

Energy conservation and emission reduction are the focus *** vehicle engine would be more efficient if it is injected a little hydrogen during work,meanwhile,the emission of the vehicle would be ***,there are many kinds of onboard hydrogen production methods,among which the microwave plasma method is regarded as the *** order to develop an onboard hydrogen production system using microwave plasma,a new corresponding test bed was designed and developed in this *** ethanol,water and air from the three supply pipelines were mixed and evaporated into gas mixture,and then the mixture was further created into hydrogen through microwave plasma *** the test bed,a hydrogen production environment required for the reaction was provided,and hydrogen would come into being when the air was broken down by the plasma under the conditions of 0.1-0.7 ***,the reaction conditions could be controlled precisely,and real-time environmental data and spectral data could be collected during the hydrogen *** experimental results showed that onboard hydrogen production could be achieved on this test bed,and the hydrogen amount produced could be adjusted to simulate real vehicle working *** addition,the system is of rapid response,high precision and reliability,which can be applied in new products developments of the onboard hydrogen production system.

关键词： hydrogen production test bed microwave plasma farm vehicle emission steam reforming partial oxidation

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一种基于通用失效率的航天设备可靠性评估算法

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空间科学学报 2007年第3期27卷 250-252页

作者：伏洪勇林宝军陈福恩中国科学院空间科学与应用研究中心中国科学院光电研究院

针对高可靠、长寿命的航天电子设备的可靠性评估问题,从Bayes定理出发,进行了理论推导,提出了一种等效任务数折合算法．在此基础上,建立了一种基于电子元器件通用失效率的电子设备可靠性评估算法模型,并对一具体航天电子设备进行了可靠... 详细信息

针对高可靠、长寿命的航天电子设备的可靠性评估问题,从Bayes定理出发,进行了理论推导,提出了一种等效任务数折合算法．在此基础上,建立了一种基于电子元器件通用失效率的电子设备可靠性评估算法模型,并对一具体航天电子设备进行了可靠性评估．

关键词： Bayes方法可靠性综合评估等效任务

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汽车组合开关操作性能评价参数的规律性探索

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汽车技术 2009年第9期 39-43页

作者：胡延平陈福恩贾艳辉北京信息科技大学中国科学院光电研究院吉林大学

通过对转向组合开关换挡过程的分析,提出了汽车组合开关的评价参数。通过对评价参数进行大样本容量的试验测试,确定了每一项参数与组合开关操作性能之间的影响关系。分析结果表明,组合开关换挡过程中换挡力的分布区域、换挡力与换挡位... 详细信息

通过对转向组合开关换挡过程的分析,提出了汽车组合开关的评价参数。通过对评价参数进行大样本容量的试验测试,确定了每一项参数与组合开关操作性能之间的影响关系。分析结果表明,组合开关换挡过程中换挡力的分布区域、换挡力与换挡位移的离散度与操作性能之间有非常明显的对应关系。在此基础上指出,可以换挡力的分布区域、离散度及换挡位移的离散度作为汽车组合开关操作性能的评价参数。

关键词：汽车组合开关操作性能评价参数

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弱电网下VSC控制环路对直流电压稳定性的影响分析

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高电压技术 2021年第8期47卷 2730-2741页

作者：张思东黄云辉周党生邢中卫陈付恩朱国荣武汉理工大学自动化学院武汉430070 禾望电气股份有限公司深圳518101

为研究弱电网下电压源型变换器(voltage source converter,VSC)控制环路对直流电压控制稳定性的影响,首先建立了弱电网下VSC直流电压时间尺度小信号模型,基于动力学特性分析法用阻尼分量和恢复分量表征VSC直流电压控制的稳定性。然后研... 详细信息

为研究弱电网下电压源型变换器(voltage source converter,VSC)控制环路对直流电压控制稳定性的影响,首先建立了弱电网下VSC直流电压时间尺度小信号模型,基于动力学特性分析法用阻尼分量和恢复分量表征VSC直流电压控制的稳定性。然后研究了不同电网强度和不同控制带宽下VSC锁相环和交流电压控制环对阻尼分量和恢复分量的影响规律,揭示了锁相控制与交流电压控制对直流电压稳定性的影响机理。最后,在Matlab/Simulink中搭建详细的时域仿真模型,对稳定性分析结果进行了验证。研究结果表明,弱电网下锁相控制与交流电压控制对直流电压控制起相位滞后的作用,从而产生负的附加阻尼分量,减弱了直流电压控制的稳定性。

关键词：弱电网锁相控制交流电压控制直流电压控制动态特性稳定性

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乘用车安全性能检测中制动性能标准分析

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汽车技术 2012年第4期 51-54页

作者：陈福恩刘双双袁雪魏学业北京交通大学

针对汽车制动过程及制动力的测试方法进行了分析,对近年来我国制定的制动力性能检验标准的优缺点进行了阐述。指出,GB 7258—87未对整个制动过程加以控制,导致通过了检测的车辆也会出现制动甩现象;GB7258—97对初始制动阶段缺乏考虑,导... 详细信息

针对汽车制动过程及制动力的测试方法进行了分析,对近年来我国制定的制动力性能检验标准的优缺点进行了阐述。指出,GB 7258—87未对整个制动过程加以控制,导致通过了检测的车辆也会出现制动甩现象;GB7258—97对初始制动阶段缺乏考虑,导致一部分合格车辆通不过检测线;GB 7258—2004标准比较科学合理。对标准中存在的不足给出了相应的解决方法。

关键词：乘用车制动性能检测标准

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Research progress on secondary formation,photosensitive reaction mechanism and human health effects of chromophoric brown carbon

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Journal of Environmental Sciences 2025年第5期151卷 310-330页

作者： Baihang chen Jiangyao chen Guiying Li Taicheng An Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control Guangdong-Hong Kong-Macao Joint Laboratory for Contaminants Exposure and HealthInstitute of Environmental Health and Pollution ControlGuangdong University of TechnologyGuangzhou 510006China Guangdong Technology Research Center for Photocatalytic Technology Integration and Equipment Engineering Guangzhou Key Laboratory of Environmental Catalysis and Pollution ControlSchool of Environmental Science and EngineeringGuangdong University of TechnologyGuangzhou 510006China

Brown carbon(BrC)has attracted widespread attention because of its strong absorption of solar radiation in the ultraviolet-visible wavelength range,which causes adverse impacts on human ***,BrC was a physically defined class of ***,current research has gradually shifted towards the identification of its chemical groups,because its light-absorbing capability,chemical properties and health effects mainly depend on the chemical composition of its ***,this review mainly focuses on the chemical understanding of BrC based on chromophores,and the secondary formation mechanism of chromophores,photosensitized reactions,and human health effects of BrC were detailly ***,BrC chromophores are divided into five categories:nitrogen-heterocycles,nitrogen-chain,aromatic species,oligomers and sulfur-containing organic *** chromophore precursor species exhibit variations,and their formation mechanisms are also ***,BrC can trigger the production of secondary organic aerosol(SOA)precursors or cause SOA growth because BrC is an important component of light-absorbing particles formed during incomplete combustion of biomass and fossil fuels,potentially exerting adverse effects on human ***,developing sufficiently separated methods for BrC and refining algorithms and machine learning can lead to a more effective understanding of the chemical composition of chromophores,thus enabling better evaluation of the atmospheric effects and health impacts of *** all,this review provides new insights into the categories of BrC chromophores and new advance in secondary formation mechanisms,photosensitized reactions,and human health effects on the basis of chemical structures.

关键词： Brown carbon Constituent characteristics Secondary formation mechanism Photosensitive Human health effects

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基于CAN总线的列控中心子系统的仿真测试平台

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铁路计算机应用 2015年第5期24卷 44-46页

作者：朱运祥陈福恩张琦北京交通大学电子信息工程学院北京100044 北京全路通信信号研究设计院有限公司北京100073

在轨道电路系统的研发测试中,利用计算机仿真技术模拟高速铁路列控中心子系统,实现与轨道电路子系统之间的安全通信,不仅可以降低ZPW-2000A轨道电路实体设备试验的高昂费用,缩短试验时间,而且可以测试部分子设备的功能、性能和可靠性,... 详细信息

在轨道电路系统的研发测试中,利用计算机仿真技术模拟高速铁路列控中心子系统,实现与轨道电路子系统之间的安全通信,不仅可以降低ZPW-2000A轨道电路实体设备试验的高昂费用,缩短试验时间,而且可以测试部分子设备的功能、性能和可靠性,提高开发效率。本文分析了高速铁路列控中心与轨道电路子系统之间的通信功能,继而实现设计算法,在实验室环境下模拟CTCS-3级高速铁路列控中心TCC与ZPW-2000A轨道电路之间的安全通信,开发了基于CAN总线双滤波模式的列控中心轨道电路子系统的仿真测试平台。

关键词：列车控制中心 ZPW-2000A轨道电路计算机仿真行车安全

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Halogen composition and heterogeneity in the continental lithospheric mantle

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Science China Earth Sciences 2025年第1期68卷 310-314页

作者： Chunfei chen State Key Laboratory of Geological Processes and Mineral Resources School of Earth SciencesChina University of GeosciencesWuhan430074China

*** Halogens,including fluorine(F),chlorine(Cl),bromine(Br),and iodine(I),are highly mobile and water-soluble elements that can become significantly enriched in melts and *** fluids and melts,halogens react with nearly all metals and readily form complexes with metal cations,significantly influencing the distribution of metal elements between different ***,halogens play a crucial role in the migration,enrichment,and mineralization of key metals in the lithosphere(Weis et al.,2012;Liu et al.,2024).

关键词： metals fluorine elements

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