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Life cycle analysis and choice of natural gas-based automotive alternative fuels in Chongqing Municipality, China

Frontiers of Environmental Science & Engineering 2007年第3期1卷 292-298页

作者： WU Rui LI Guangyi zhang zongyi REN Yulong HAN Weijian Chongqing University Chongqing 400044China Ford Motor Company Dearborn MI 48150USA

Road transport produces significant amounts of emissions by using crude oil as the primary energy source.A reduction of emissions can be achieved by implementing alternative fuel *** objective of this study is to carry out an economic,environmental and energy(EEE)life cycle study on natural gas-based automotive fuels with conven-tional gasoline in an abundant region of China.A set of indices of four fuels/vehicle systems on the basis of life cycle are assessed in terms of impact of EEE,in which natural gas produces compressed natural gas(CNG),methanol,dimethy-lether(DME)and Fischer Tropsch diesel(FTD).The study included fuel production,vehicle production,vehicle opera-tion,infrastructure and vehicle end of life as a system for each fuel/vehicle system.A generic gasoline fueled car is used as a *** have been reviewed and modified based on the best knowledge available to Chongqing local *** indicated that when we could not change electric and hydrogen fuel cell vehicles into commercial vehicles on a large scale,direct use of CNG in a dedicated or bi-fuel vehicle is an eco-nomical choice for the region which is most energy efficient and more environmental *** study can be used to support decisions on how natural gas resources can best be utilized as a fuel/energy resource for automobiles,and what issues need to be resolved in *** models and approaches for this study can be applied to other regions of China as long as all the assumptions are well defined and modified to find a substitute automotive energy source and establish an energy policy in a specific region.

关键词： life cycle assessment natural gas based substitute automotive fuels

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Social credit:a comprehensive literature review

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Financial Innovation 2015年第1期1卷 70-87页

作者： Lean Yu Xinxie Li Ling Tang zongyi zhang Gang Kou School of Economics and Management Beijing University of Chemical TechnologyBeijing 100029China School of Business Administration Southwestern University of Finance and EconomicsChengdu 611130China

To avoid credit fraud,social credit within an economic system has become an increasingly important criterion for the evaluation of economic agent activity and guaranteeing the development of a market economy with minimal supervision *** paper provides a comprehensive review of the social credit literature from the perspectives of theoretical foundation,scoring methods,and regulatory *** study considers the credit of various economic agents within the social credit system such as countries(or governments),corporations,and individuals and their credit variations in online markets(i.e.,network credit).A historical review of the theoretical(or model)development of economic agents is presented together with significant works and future research *** interesting conclusions are summarized from the literature review.(1)Credit theory studies can be categorized into traditional and emerging schools both focusing on the economic explanation of social credit in conjunction with creation and evolution mechanisms.(2)The most popular credit scoring methods include expert systems,econometric models,artificial intelligence(AI)techniques,and their hybrid *** indexes should vary across different target agents.(3)The most pressing task for regulatory mechanisms that supervise social credit to avoid credit fraud is the establishment of shared credit databases with consistent data standards.

关键词： Social credit Literature review Credit scoring Regulatory mechanism Credit risk

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Epidemic Characteristics and Spatio-Temporal Patterns of HFRS in Qingdao City,China,2010-2022

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Biomedical and Environmental Sciences 2024年第9期37卷 1015-1029页

作者： Ying Li Runze Lu Liyan Dong Litao Sun zongyi zhang Yating Zhao Qing Duan Lijie zhang Fachun Jiang Jing Jia Huilai Ma Chinese Field Epidemiology Training Program Chinese Center for Disease Control and PreventionBeijing 100050China National Institute for Viral Disease Control and Prevention Chinese Center for Disease Control and PreventionBeijing 102206China Qingdao Municipal Center for Disease Control and Prevention Qingdao 266024ShandongChina Jiaozhou Center for Disease Control and Prevention Qingdao 266399ShandongChina Institute for Infectious Disease Control and Prevention Shandong Center for Disease Control and PreventionJinan 250013ShandongChina Office of Epidemiology(Technical Guidance Office for Patriotic Health Work) Chinese Center for Disease Control and PreventionBeijing 102206China

Objective This study investigated the epidemic characteristics and spatio-temporal dynamics of hemorrhagic fever with renal syndrome(HFRS)in Qingdao City,*** Information was collected on HFRS cases in Qingdao City from 2010 to *** epidemiologic,seasonal decomposition,spatial autocorrelation,and spatio-temporal cluster analyses were *** A total of 2,220 patients with HFRS were reported over the study period,with an average annual incidence of 1.89/100,000 and a case fatality rate of 2.52%.The male:female ratio was 2.8:1.75.3%of patients were aged between 16 and 60 years old,75.3%of patients were farmers,and 11.6%had both“three red”and“three pain”*** HFRS epidemic showed two-peak seasonality:the primary fall-winter peak and the minor spring *** HFRS epidemic presented highly spatially heterogeneous,street/township-level hot spots that were mostly distributed in Huangdao,Pingdu,and *** spatio-temporal cluster analysis revealed three cluster areas in Qingdao City that were located in the south of Huangdao District during the fall-winter *** The distribution of HFRS in Qingdao exhibited periodic,seasonal,and regional characteristics,with high spatial clustering *** typical symptoms of“three red”and“three pain”in patients with HFRS were not obvious.

关键词： Hemorrhagic fever with renal syndrome Epidemic characteristics Spatio-temporal distribution

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An Empirical Research on the Relationship between Board of Directors Governance and Corporate Performance of Chinese Public Companies

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Chinese Business Review 2004年第7期3卷 7-13页

作者： Jian Zhu Zengji Song zongyi zhang Dongsan Ave.80# Yichang City Hubei province P.R.China443002 Business School of Chongqing University Chongqing E R. China 400044 Business School of Chongqing University Chongqing ER.China 400044

Board of directors is an important component part of corporate governance. As a governance mechanism, we empirically study relationship among the scale of the board of directors, the structure of the board of directors and the duality leadership structure with corporate performance in Chinese public companies. The result shows that the smaller scale of the board of the directors is, the better performance is. With the ownership structure changing better, the structure of the board of directors will change better and promote the performance. The duality leadership structure doesn＇t affect the corporate performance. The fundamental method for the governance effectiveness of the board is to set up the reasonable ownership structure and the marketing mechanism for occurrences in human .

关键词： board of directors corporate governance corporate performance

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Molecular Mechanism of Ginseng in Treating Nephrotic Syndrome Based on Network Pharmacology and Experimental Verification

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Medicinal Plant 2023年第3期14卷 18-24页

作者： Zhenyuan LI Hailin GAN zongyi zhang Yang SONG School of Pharmacy Key Laboratory of Molecular Pharmacology and Drug Evaluation(Yantai University)Ministry of EducationCollaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of ShandongYantai UniversityYantai 264005China

[Objectives]To study the potential molecular mechanism of ginseng in treating nephrotic syndrome(NS)by using network pharmacology,molecular docking and experimental verification methods.[Methods]The active components and targets of ginseng were obtained through the network pharmacology database,and the potential targets for the treatment of NS were *** STRING data platform and Cytoscape software were used to construct protein interaction network,and carry out GO and KEGG enrichment *** docking of active components of ginseng and core targets was *** in vitro experiment verified the improvement effect of kaempferol,a key active ingredient of ginseng,on podocyte injury.[Results]After screening,17 active components of ginseng and 38 key targets for treating NS were *** and KEGG enrichment analysis showed that NF-κB,MAPK and other inflammatory pathways were *** docking results show that the core components had good binding activity to key *** results of in vitro experiments show that kaempferol can reduce the phosphorylation level of AKT1,down-regulate the expression levels of NF-κB p65 and p-NF-κB p65,play an anti-inflammatory effect by inhibiting the activation of NF-κB pathway,and improve podocyte injury.[Conclusions]Ginseng may play a role in the treatment of NS by regulating multiple targets and pathways such as inflammatory response,substance metabolism,and signal transduction.

关键词： Ginseng Nephrotic syndrome(NS) Network pharmacology Molecular docking Experimental verification

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Tunable reducibility of Brillouin zone and bandgap width in elliptical nanowire arrays

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Chinese Optics Letters 2020年第6期18卷 75-80页

作者： zongyi zhang Yonggang Wu Zihuan Xia Jian Zhou Xuefei Qin MOE Key Laboratory of Advanced Micro-Structured Materials School of Physics Science and EngineeringTongji UniversityShanghai 200092China Institute of Precision Optical Engineering School of Physics Science and EngineeringTongji UniversityShanghai 200092China School of Aerospace Engineering and Applied Mechanics Tongji UniversityShanghai 200092China

Rotating elliptical nanowire arrays as two-dimensional photonic crystals has been proposed and studied in this *** analysis of the four lowest energy bands and the first bandgap width of some examples illustrates that the rotation and configuration of the primitive cell can have effects on the reducibility of the Brillouin *** the central element’s orientation changes,the irreducible Brillouin zone could be expanded to the whole first Brillouin *** attention has been paid to the nanowire arrays with adjacent elements perpendicular to each other,and the irreducible Brillouin zone unexpectedly retracted back to the 1/8 of the first Brillouin zone though the symmetry of elements is lower than that of the square ***,the first bandgap width of the perpendicular array can be adjusted by the rotation of each primitive element.

关键词： Brillouin zone bandgap symmetry perpendicular elliptical nanowires rotation

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“十五”期间中国农机化效率及其地区差异

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农业工程学报 2008年第7期24卷 284-289页

作者：张宗毅曹光乔农业部南京农业机械化研究所南京210014

中国农业机械化在"十五"期间取得了较大发展,但是,在农业机械化水平绝对值增长的同时,各地区较少注重农机化效率的提升,同时各地区农机化效率也存在较大差异。该文采用2001～2005共5年的统计数据(PanelData),用数据包络法(DEA)分析"十五... 详细信息

中国农业机械化在"十五"期间取得了较大发展,但是,在农业机械化水平绝对值增长的同时,各地区较少注重农机化效率的提升,同时各地区农机化效率也存在较大差异。该文采用2001～2005共5年的统计数据(PanelData),用数据包络法(DEA)分析"十五"期间中国各地区农机化的技术效率、纯技术效率、规模效率、技术进步及Malmquist指数的变动及趋势,并用2005年数据分析全国各地区农机化相对效率,最后根据分析结果提出了提高中国农机化效率的具体建议。

关键词：农机化效率 Malmquist指数 DEA 地区差异

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全国小麦联合收割机跨区作业空间流动规律

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农业工程学报 2021年第23期37卷 19-27页

作者：张宗毅戚山明张萌江苏大学中国农业装备产业发展研究院镇江212013 农业农村部南京农业机械化研究所南京210014

农机跨区作业是提升农机利用率、实现小农户和现代农业发展有机衔接的重要途径。该研究基于16938台雷沃小麦联合收割机2020年5—6月作业数据,从省、市、县尺度揭示了全国小麦联合收割机跨区作业空间流动规律。首先运用大数据分析方法实... 详细信息

农机跨区作业是提升农机利用率、实现小农户和现代农业发展有机衔接的重要途径。该研究基于16938台雷沃小麦联合收割机2020年5—6月作业数据,从省、市、县尺度揭示了全国小麦联合收割机跨区作业空间流动规律。首先运用大数据分析方法实现小麦联合收割机跨区作业空间流动可视化,考察跨区作业流量、时空及首位联系格局;然后运用社会网络分析法从网络密度、中心性以及群组聚类等维度探究了小麦联合收割机跨区作业网络结构及内部特征。结果表明:1)不同尺度下小麦联合收割机时空分布格局存在异质性。随尺度细化,小麦联合收割机流量依次呈现块状、带状、核心聚集形态,形成“河南—河北—山东”为主的省级三角形空间格局和以南阳、驻马店、咸阳、西安为核心的散射状市级空间格局,中短距离地区间联系强度逐渐增强。2)“三夏(夏收、夏种、夏管)”农忙期间小麦联合收割机作业重心随小麦成熟期大规模自南向北移动,作业规模整体呈现“M”形并在5月中下旬至6月中上旬达到高峰。3)河南既是小麦联合收割机主要输出地,也是主要跨区作业目的地,但作为目的地的空间指向性更强。4)跨区作业网络在省级层面联系程度最紧密,河南、河北及山东居于网络中心,南阳、驻马店、周口、商丘、保定、聊城、菏泽、邯郸等市中心性较强。5)在若干子网络中,河南、河北省内跨区作业为主的分组作业规模最大,平均跨区距离分别为248和238 km,以其为中心形成的县级凝聚子群联系最密切。该文研究结果系统揭示了全国小麦联合收割机跨区作业的时空流动特征及作业网络结构特征,不仅有利于在宏观上把握农机跨区作业空间流动规律,还有利于机手、农机企业和政府优化行为决策,提高跨区作业调度及组织效率。

关键词：农业机械化跨区作业流动网络分析

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“十四五”期间丘陵山区农田宜机化改造若干重大问题与举措

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中国农村经济 2020年第11期 13-28页

作者：张宗毅农业农村部南京农业机械化研究所

丘陵山区是中国重要的果蔬茶和特色粮油生产基地,是中国乡村振兴的重要区域。然而由于地形条件限制,目前中国丘陵山区农业机械化水平远低于平原地区,农业农村现代化进程严重滞后。对丘陵山区的农田进行小并大、短并长、坡改平等适宜机... 详细信息

丘陵山区是中国重要的果蔬茶和特色粮油生产基地,是中国乡村振兴的重要区域。然而由于地形条件限制,目前中国丘陵山区农业机械化水平远低于平原地区,农业农村现代化进程严重滞后。对丘陵山区的农田进行小并大、短并长、坡改平等适宜机械化作业的工程改造,是解决丘陵山区农业机械化滞后问题的关键措施。本文首先从丘陵山区在全国农业农村中的重要性、农业机械化发展滞后带来的问题和发展农业机械化的解决方案等三个维度阐述了丘陵山区农田宜机化改造的内在逻辑,然后实证分析了国内外的实践案例,分析了高标准农田建设与宜机化关系、改造对象范围如何确定、改造资金和补贴资金如何测算、具体改造工作机制如何选择、改造技术标准如何优化等农田宜机化改造实践中面临的问题。分析结果表明:按照目前每公顷15000~60000元的改造成本计算只需要每年每公顷额外带来412.5~1650元的效益就能盈亏平衡,而目前实践中宜机化改造后的耕地每年每公顷至少能额外产生4500元的收益;此外农户参与、先建后补、定额补助、差额自筹的工作机制要优于全部由政府包办的高标准农田建设工作机制。本文最后提出相应的具体政策建议。

关键词：高标准农田建设丘陵山区宜机化农业机械化

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推进“三位一体”教育评价改革与时俱进建设世界一流大学

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中国高教研究 2022年第9期 7-10页

作者：张宗益厦门大学福建厦门361005

随着中国特色社会主义进入新时代,我国高等教育迈向高质量发展新阶段,一流大学建设进入新时期。教育评价改革是牵引新时代一流大学建设的重中之重,厦门大学全面贯彻落实《深化新时代教育评价改革总体方案》,坚持以“人才”为关键,以“... 详细信息

随着中国特色社会主义进入新时代,我国高等教育迈向高质量发展新阶段,一流大学建设进入新时期。教育评价改革是牵引新时代一流大学建设的重中之重,厦门大学全面贯彻落实《深化新时代教育评价改革总体方案》,坚持以“人才”为关键,以“学院”为主体,以“创新”为靶向,推进“三位一体”教育评价改革,与时俱进建设世界一流大学。

关键词： “三位一体” 教育评价改革一流大学建设

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