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Energy consumption of 270 schools in Tianjin, China

Frontiers in Energy 2015年第2期9卷 217-230页

作者： Jincheng XING Junjie chen jihong LING School of Environmental Science and Engineering Tianjin UniversityTianjin 300072 China

With the rapid development of education cause, the increasing energy consumption of school buildings is gradually causing widespread concern in recent years in China. This paper presented an analysis of energy consumption of 270 schools located in the city of Tianjin, China. The analysis focused specifically on calculating the space heating energy consumption indexes and non-heating energy consumption indexes of different types of schools, aiming at providing reliable and precise data for the government to elaborate policies and measures. The space heating energy consumption of schools adopting district heating and gas boiler were 92.04 kWh/（m2. a） and 64.25 kWh/（m2. a）, respectively. Comparing to the schools without a canteen, the non-heating energy consumption index of schools with a canteen can increase by 8%-37%. Furthermore, clustering of different energy sources, the total primary energy consumption indexes were also presented. Space heating energy consumption accounted for approximately 64%-79% of the total primary energy consumption. When using time-sharing control and self- contained gas boiler instead of district heating, an amount of almost 27.8 kWh/（mZ-a） and 77.5 kWh/（m2.a） can be saved respectively. Through extensive statistical analysis of the data collected, this paper demonstrated that gross floor area, heating energy source and canteen had a close relationship with the total primary energy consumption regarding complete schools. Eventually, a linear regression equation was established to make a simple prediction about the total energy consumption of existing complete schools and to estimate the energy consumption of complete schools to be built.

关键词： schools energy consumption index primaryenergy energy saving regression analysis

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辽宁弓长岭铁矿床成矿物质来源及磁铁富矿成因探讨

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岩石学报 2025年第1期41卷 289-303页

作者：孙晓辉汤好书陈继宏白鹏飞长安大学地球科学与资源学院西部矿产资源与地质工程教育部重点实验室西安710054 中国科学院地球化学研究所矿床地球化学国家重点实验室贵阳550081 鞍钢集团矿业弓长岭有限公司井采分公司辽阳111008 中国恩菲工程技术有限公司北京100080

辽宁鞍本地区是我国最大的BIF型铁矿资源基地,弓长岭铁矿床是该区最大的富铁矿床,其富铁矿成因机制备受关注。目前多认为其为热液改造条带状铁矿(贫矿)而成,但关于热液性质还存在变质热液、混合岩化热液及大气降水等不同认识。在总结前... 详细信息

辽宁鞍本地区是我国最大的BIF型铁矿资源基地,弓长岭铁矿床是该区最大的富铁矿床,其富铁矿成因机制备受关注。目前多认为其为热液改造条带状铁矿(贫矿)而成,但关于热液性质还存在变质热液、混合岩化热液及大气降水等不同认识。在总结前人研究成果基础上,本研究对辽宁弓长岭铁矿床二矿区条带状铁矿及富铁矿进行了系统的微量元素及Nd-Pb-S同位素分析,结果显示:条带状铁矿及富铁矿中磁铁矿的稀土配分模式一致,成矿物质来源于海水与高温热液混合。条带状铁矿中磁铁矿的ε_(Nd)(t)值变化较大(-6.9~1.5),而富铁矿中磁铁矿相应值(-7.7~-6.1)偏负且集中,指示形成富铁矿的热液流体来自地壳浅部。条带状铁矿中磁铁矿铅同位素μ值介于9.36~10.75,显示壳幔混源的特征;而富铁矿中磁铁矿的μ值(9.58~13.14)较高,指示后期壳源流体交代改造。条带状铁矿中黄铁矿的硫同位素值偏负,且分布集中(-2.08‰~-0.66‰,平均值-1.52‰),而富铁矿中黄铁矿的δ^(34)S同位素值(1.88‰~3.36‰,平均值2.39‰)明显偏重,指示富重硫同位素流体的交代作用。综合推测这种改造条带状铁矿的壳源、富重硫同位素的流体应为变质水与大气降水的混合热液流体,富铁矿为条带状铁矿在古元古代晚期经该混合热液流体改造,发生去硅存铁作用而成。

关键词：弓长岭鞍山群条带状铁建造磁铁富矿 Nd-Pb-S同位素

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Real-time Bezier interpolation satisfying chord error constraint for CNC tool path

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Science China(Technological Sciences) 2016年第2期59卷 203-213页

作者： FAN Wei LEE chenHan chen jihong XIAO Yao National NC System Engineering Research Center Huazhong University of Science and Technology Institute of Mechanical Manufacturing Technology China Academy of Engineering Physics Aerospace Engineering Department Zhejiang University

G01 code generated by a computer-aided manufacture （CAM） system is the most common form of tool trajeclory in computer numerical control （CNC） machining. A tool path composed of short line segments has discontinuous tangenc t and curvature, generating large fluctuations of feedrate and acceleration, which in turn produces vibration in a machine tool. To obtain a smooth tool path, many methods on tool-path smoothing have been developed. However, the shortcomings i：1 these methods exist when they are employed in a CNC system. It is difficult to simultaneously to guarantee the following requirements of CNC machining：（1） chord error should be rigidly constrained; （2） G01 points should be interpolated; （3） cur,,ature should be continuous （G2）; （4） machining should be applicable to spatial cases; （5） real-time performance of computaEion is *** on these various requirements, this study proposes an interpolation scheme using CUDlC t^ezler curves anu mciuucb illl adjustment strategy to eliminate deficiencies in the tool path. The tool path generated is G2, chord-elror-constrained, G01-point-interpolated, loop-free, and optimized for both stretch and jerk energy. The method is applicable ：o 3D cases and involves only simple algebraic computations. Thus, the algorithm can be applied to real-time CNC machining. A simulation is conducted to validate the efficiency of the algorithm. In addition, an experiment reveals its advantage over Hermite interpola- tion in surface quality and machining efficiency.

关键词： real-time CNC machining stretch energy jerk energy loop-free chord error

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An intermodal transportation geospatial network modeling for containerized soybean shipping

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Journal of Ocean Engineering and Science 2017年第2期2卷 143-153页

作者： Xiang Liu Yun Bai jihong chen Department of Civil and Environmental Engineering RutgersThe State University of New JerseyUnited States Center for Advanced Infrastructure and Transportation(CAIT) RutgersThe State University of New JerseyUnited States College of Transport and Communications Shanghai Maritime UniversityChina

Containerized shipping is a growing market for agricultural exports,particularly *** order to understand the optimal strategies for improving the United States’economic competitiveness in this emerging market,this research develops an intermodal transportation network modeling framework,focusing on *** container *** upon detailed modal cost analyses,a Geospatial Intermodal Freight Transportation(GIFT)model has been developed to understand the optimal network design for *** *** on market demand and domestic supply figures,the model is able to determine which domestically produced soybeans should go to which foreign markets,and by which transport *** research and its continual studies,will provide insights into future policies and practices that can improve the transportation efficiency of soybean logistics.

关键词： International shipping Rail Truck Barge Agricultural logistics Intermodal

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Development of a Bionic Hexapod Robot for Walking on Unstructured Terrain

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Journal of Bionic Engineering 2014年第2期11卷 176-187页

作者： He Zhang Yubin Liu Jie Zhao Jie chen jihong Yan State Key Lab of Robotics and System Harbin Institute of Technology Harbin 150080 P. R. China

This paper reports the design methodology and control strategy in the development of a novel hexapod robot HITCR-II that is suitable for walking on unstructured terrain. First, the entire sensor system is designed to equip the robot with the perception of external environment and its internal states. The structure parameters are optimized for improving the dexterity of the robot. Second, a foot-force distribution model and a compensation model are built to achieve posture control. The two models are capable of effectively improving the stability of hexapod walking on unstructured terrain. Finally, the Posture Control strategy based on Force Distribution and Compensation （PCFDC） is applied to the HITCR-II hexapod robot. The experimental results show that the robot can effectively restrain the vibration of trunk and keep stable while walking and crossing over the un- structured terrains.

关键词： hexapod robot structure optimization posture control force distribution force compensation

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Harmonic reducer in-situ fault diagnosis for industrial robots based on deep learning

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Science China(Technological Sciences) 2022年第9期65卷 2116-2126页

作者： ZHOU Xing ZHOU Huicheng HE YiMing HUANG ShiFeng ZHU ZhiHong chen jihong School of Mechanical Science and Engineering Huazhong University of Science and TechnologyWuhan 430074China Foshan Institute of Intelligent Equipment Technology Foshan 528234China

The harmonic reducer is an essential kinetic transmission component in the industrial *** is easy to be fatigued and resulted in physical malfunction after a long period of ***,an accurate in-situ fault diagnosis for the harmonic reducers in an industrial robot is especially *** paper proposes a fault diagnosis method based on deep learning for the harmonic reducer of industrial robots via consecutive time-domain vibration *** the sampling signals from industrial robots are long,narrow,and channel-independent,this method combined a 1-dimensional convolutional neural network with matrix kernels(1-D MCNN)adaptive *** adjusting the size of the convolution kernels,it can concentrate on the contextual feature extraction of consecutive time-domain data while retaining the ability to process the multi-channel fusion *** proposed method is examined on a physical industrial robot platform,which has achieved a prediction accuracy of99%.Its performance is appeared to be superior in comparison to the traditional 2-dimensional CNN,deep sparse automatic encoding network(DSAE),multilayer perceptual network(MLP),and support vector machine(SVM).

关键词： harmonic reducer industrial robots fault diagnosis convolutional neural network(CNN)

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Research on Normal Pythagorean Neutrosophic Set Choquet Integral Operator and Its Application

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Computer Modeling in Engineering & Sciences 2022年第4期131卷 477-491页

作者： Changxing Fan jihong chen Keli Hu En Fan Xiuqing Wang Department of Computer Science Shaoxing UniversityShaoxingChina College of Management Shenzhen University ShenzhenChina Information Technology R&D Innovation Center of Peking University ShaoxingChina

We first propose the normal Pythagorean neutrosophic set(NPNS)in this paper,which synthesizes the distribution of the incompleteness,indeterminacy,and inconsistency of the Pythagorean neutrosophic set(PNS)and normal fuzzy *** also define some properties of *** solving the decision-making problem of the nonstrictly independent and interacting attributes,two kinds of NPNS Choquet integral operators are ***,the NPNS Choquet integral average(NPNSCIA)operator and the NPNS Choquet integral geometric(NPNSCIG)operator are ***,their calculating formulas are derived,their properties are discussed,and an approach for solving the interacting multi-attribute decision making based on the NPNS is ***,the two kinds of operators are applied to validate the stability of the new method.

关键词： Normal pythagorean neutrosophic set(NPNS) NPNS choquet integral average(NPNSCIA)operator NPNS choquet integral geometric(NPNSCIG)operator multi-attribute decision making(MADM)

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CPS Modeling of CNC Machine Tool Work Processes Using an Instruction-Domain Based Approach

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Engineering 2015年第2期1卷 247-260页

作者： jihong chen Jianzhong Yang Huicheng Zhou Hua Xiang Zhihong Zhu Yesong Li chen-Han Lee Guangda Xu National Numerical Control System Engineering Research Center Huazhong University of Science and Technology

Building cyber-physical system(CPS) models of machine tools is a key technology for intelligent manufacturing. The massive electronic data from a computer numerical control(CNC) system during the work processes of a CNC machine tool is the main source of the big data on which a CPS model is established. In this work-process model, a method based on instruction domain is applied to analyze the electronic big data, and a quantitative description of the numerical control(NC) processes is built according to the G code of the processes. Utilizing the instruction domain, a work-process CPS model is established on the basis of the accurate, real-time mapping of the manufacturing tasks, resources, and status of the CNC machine tool. Using such models, case studies are conducted on intelligent-machining applications, such as the optimization of NC processing parameters and the health assurance of CNC machine tools.

关键词： cyber-physical system (CPS) big data computer numerical control (CNC) machine tool electronic data of work processes instruction domain intelligent machining

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Improving the resilience of maritime supply chains: The integration of ports and inland transporters in duopoly markets

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Frontiers of Engineering Management 2023年第1期10卷 51-66页

作者： Jia SHI jihong chen Lang XU Zhongjie DI Qunzhen QU College of Management Shenzhen UniversityShenzhen 518071China School of Transport and Communications Shanghai Maritime UniversityShanghai 201306China Hainan Special Project Wuhan University of TechnologySanya 572025China School of Economics&Management Shanghai Maritime UniversityShanghai 201306China

The adverse impact of the outbreak of COVID-19 has reduced ports’ operational efficiency. In addition, ports and inland logistics providers are generally independent of each other and difficult to work together, which leads to time loss. Thus, as the core player, ports can integrate with inland logistics providers to improve the efficiency and resilience of maritime supply chains. This study examines the strategic options of two competing maritime supply chains consisting of ports and inland logistics providers. We investigate the impact of cooperation between ports and inland logistics providers and government regulation on the maritime supply chain by comparing members’ optimal pricing and overall social welfare under centralized, decentralized, and hybrid scenarios. Results indicate that the hybrid scenario is an equilibrium strategy for maritime supply chain, although this strategy is not optimal for governments seeking to improve supply chain resilience and maximize social welfare. Furthermore, observations show that through government economic intervention, both seaborne supplies can be incentivized to adopt an integrated strategy, and business and society can achieve a win–win situation.

关键词： resilience Hotelling model social welfare maritime supply chain game theory

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Toward Intelligent Machine Tool

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Engineering 2019年第4期5卷 679-690页

作者： jihong chen Pengcheng Hu Huicheng Zhou Jianzhong Yang Jiejun Xie Yakun Jiang Zhiqiang Gao chenglei Zhang National Numerical Control System Engineering Research Center Huazhong University of Science and TechnologyWuhan 430074China

With the development of modern information technology-and particularly of the new generation of artificial intelligence(AI)technology-new opportunities are available for the development of the intelligent machine tool(IMT).Based on the three classical paradigms of intelligent manufacturing as defined by the Chinese Academy of Engineering,the concept,characteristics,and systemic structure of the IMT are presented in this *** stages of machine tool evolution-from the manually operated machine tool(MOMT)to the IMT-are discussed,including the numerical control machine tool(NCMT),the smart machine tool(SMT),and the ***,the four intelligent control principles of the IMT-namely,autonomous sensing and connection,autonomous learning and modeling,autonomous optimization and decision-making,and autonomous control and execution-are presented in *** paper then points out that the essential characteristic of the IMT is to acquire and accumulate knowledge through learning,and presents original key enabling technologies,including the instruction-domain-based analytical approach,theoretical and big-data-based hybrid modeling technology,and the double-code control *** on this research,an intelligent numerical control(INC)system and industrial prototypes of IMTs are *** intelligent practices are conducted,demonstrating that the integration of the new generation of AI technology with advanced manufacturing technology is a feasible and convenient way to advance machine tools toward the IMT.

关键词： Intelligent manufacturing Intelligent machine tool Intelligent numerical controller New-generation artificial intelligence

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