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The impact of demographic dynamics on food consumption and its environmental outcomes:Evidence from China

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Journal of Integrative Agriculture 2024年第2期23卷 414-429页

作者： Shaoting Li Xuan Chen yanjun ren Thomas Glauben College of Economics and Management Northwest A&F UniversityYangling 712100China Leibniz Institute of Agricultural Development in Transition Economies(IAMO) Halle(Saale)06120Germany Sino-German Center for Agricultural and Food Economics Northwest A&F UniversityYangling 712100China

With increasing population and changing demographics,food consumption has experienced a significant transition in quantity and ***,a dearth of knowledge remains regarding its environmental impacts and how it responds to demographic dynamics,particularly in emerging economies like *** the two-stage Quadratic Almost Demand System(QUAIDS)model,this study empirically examines the impact of demographic dynamics on food consumption and its environmental outcomes based on the provincial data from 2000 to 2020 in *** various scenarios,according to changes in demographics,we extend our analysis to project the long-term trend of food consumption and its environmental impacts,including greenhouse gas(GHG)emissions,water footprint(WF),and land appropriation(LA).The results reveal that an increase in the proportion of senior people significantly decreases the consumption of grain and livestock meat and increases the consumption of poultry,egg,and aquatic products,particularly for urban ***,an increase in the proportion of males in the population leads to higher consumption of poultry and aquatic ***,in the current scenario of an increased aging population and sex ratio,it is anticipated that GHG emissions,WF,and LA are likely to decrease by 1.37,2.52,and 3.56%,*** importantly,in the scenario adhering to the standards of nutritional intake according to the Dietary Guidelines for Chinese Residents in 2022,GHG emissions,WF,and LA in urban areas would increase by 12.78,20.94,and 18.32%,*** findings suggest that changing demographics should be considered when designing policies to mitigate the diet-environment-health trilemma and achieve sustainable food consumption.

关键词： demographic dynamics food consumption environmental impacts nutrition intakes

Tire Road Friction Coefficient Estimation:Review and Research Perspectives

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Chinese Journal of Mechanical Engineering 2022年第2期35卷 1-11页

作者： Yan Wang Jingyu Hu Fa’an Wang Haoxuan Dong Yongjun Yan yanjun ren Chaobin Zhou Guodong Yin School of Mechanical Engineering Southeast UniversityNanjing 211189China College of Mechano-Electronic Engineering Lanzhou University of TechnologyLanzhouGansu 730050China

Many surveys on vehicle traffic safety have shown that the tire road friction coefficient(TRFC)is correlated with the probability of an *** probability of road accidents increases sharply on slippery road ***,accurate knowledge of TRFC contributes to the optimization of driver maneuvers for further improving the safety of intelligent vehicles.A large number of researchers have employed different tools and proposed different algorithms to obtain *** work investigates these different methods that have been widely utilized to estimate *** methods are divided into three main categories:off-board sensors-based,vehicle dynamics-based,and data-driven-based *** review provides a comparative analysis of these methods and describes their strengths and ***,some future research directions regarding TRFC estimation are presented.

关键词： Intelligent vehicles Tire road friction coefficient(TRFC) Off-board sensors-based method Vehicle dynamics-based method Data-driven-based method

中国食物消费温室气体排放:区域差异与情景分析

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生态经济 2025年第1期41卷 210-220页

作者：侯欢鲜帛彤隋明杉许雅琳李梦王雅楠任彦军陈伟西北农林科技大学经济与管理学院陕西杨凌712100

食物系统的温室气体排放量已经占到全球人为温室气体排放量的三分之一以上。论文采用混合LCA-IO方法对中国农产品从农场到餐桌的生产、加工、运输和销售四个阶段的温室气体排放量进行了测量,并采用地理加权回归(GWR)模型对食物温室气体... 详细信息

食物系统的温室气体排放量已经占到全球人为温室气体排放量的三分之一以上。论文采用混合LCA-IO方法对中国农产品从农场到餐桌的生产、加工、运输和销售四个阶段的温室气体排放量进行了测量,并采用地理加权回归(GWR)模型对食物温室气体排放驱动力进行分析。结果表明:(1)食物生产和加工过程中的温室气体排放量占温室气体排放总量的90%以上;(2)人均消费、消费结构、人口规模和经济发展成为影响温室气体排放的主要驱动因素;(3)通过情景分析,以大豆和蛋类代替肉类可以有效减少温室气体排放,有助于实现温升1.5℃的目标。此外,水产品和单胃肉的替代也可以在一定程度上起到温室气体减排的作用。论文最后从生产者和消费者的角度提出相应的减排建议。

关键词：温室气体排放 LCA-IO模型食物消费结构情景分析可持续消费

Spatiotemporal characteristics of cultivated land use eco-efficiency and its influencing factors in China from 2000 to 2020

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Journal of Arid Land 2024年第3期16卷 396-414页

作者： LI Shaoting MU Na ren yanjun Thomas GLAUBEN College of Economics and Management Northwest A&F UniversityYangling 712100China Sino-German Center for Agricultural and Food Economics Northwest A&F UniversityYangling 712100China Leibniz Institute of Agricultural Development in Transition Economies(IAMO) Halle 06120Germany

Improving cultivated land use eco-efficiency(CLUE)can effectively promote agricultural sustainability,particularly in developing countries where CLUE is generally *** study used provincial-level data from China to evaluate the spatiotemporal evolution of CLUE from 2000 to 2020 and identified the influencing factors of CLUE by using a panel Tobit *** addition,given the undesirable outputs of agricultural production,we incorporated carbon emissions and nonpoint source pollution into the global benchmark-undesirable output-super efficiency-slacks-based measure(GB-US-SBM)model,which combines global benchmark technology,undesirable output,super efficiency,and slacks-based *** results indicated that there was an upward trend in CLUE in China from 2000 to 2020,with an increase rate of 2.62%.The temporal evolution of CLUE in China could be classified into three distinct stages:a period of fluctuating decrease(2000-2007),a phase of gradual increase(2008-2014),and a period of rapid growth(2015-2020).The major grain-producing areas(MPAs)had a lower CLUE than their counterparts,namely,non-major grain-production areas(non-MPAs).The spatial agglomeration effect followed a northeast-southwest strip distribution;and the movement path of barycentre revealed a"P"shape,with Luoyang City,Henan Province,as the *** terms of influencing factors of CLUE,investment in science and technology played the most vital role in improving CLUE,while irrigation index had the most negative *** should be noted that these two influencing factors had different impacts on MPAs and ***,relevant departments should formulate policies to enhance the level of science and technology,improve irrigation condition,and promote sustainable utilization of cultivated land.

关键词： cultivated land use eco-efficiency(CLUE) slacks-based measure(SBM)model barycentre model standard deviation ellipse(SDE) panel Tobit model carbon emissions nonpoint source pollution

Effects of mixed rare earth fertilizer on yield and nutrient quality of leafy vegetables during different seasons

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Journal of Rare Earths 2016年第6期34卷 638-643页

作者：任艳军任学军马建军闫立英 Analysis and Testing Centre Hebei Normal University of Science and Technology

Using Chinese cabbage and rape as test material and examining the same soil conditions at different seasons（spring and autumn）, the effects of mixed rare earth fertilizer on the yield and nutrient quality of leafy vegetables were studied to provide a theoretical basis for the application of mixed rare earth fertilizer in agriculture. Results showed a seasonal difference in the nutrient quality of Chinese cabbage and rape. For crops planted in autumn, the soluble sugar and vitamin C content were higher, the titratable acid and nitrate content were lower, and the sugar acid ratio was higher relative to crops planted in spring. Mixed rare earth treatments promoted growth of both crops during both seasons. The plot yield, stem and leaf fresh and dry matter weight, and dry and fresh ratio increased. These increases for Chinese cabbage were greater in autumn than in spring while for rape, the increases were greater in spring than autumn. The soluble sugar content, titratable acid content and sugar acid ratio were increased and the nitrate content decreased, in autumn the effects were more obvious than in spring. In spring, the vitamin C content was increased, and the increase was greater for Chinese cabbage than rape. In autumn, the vitamin C content decreased, and the decrease was greater for rape than Chinese cabbage. At the same time, the content of heavy metals such as Cu, Zn, Cd, Pb and Ni in stems and leaves decreased. This decrease was greater in spring for Chinese cabbage and in autumn for rape.

关键词： mixed rare earth fertilizer yield nutrient quality seasons Chinese cabbage rape

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非法获取虚拟货币行为的刑法定性分析

法商研究 2022年第5期39卷 160-173页

作者：任彦君河南财经政法大学刑事司法学院

虚拟货币是网络科技不断发展的产物,在虚拟货币相关犯罪频发的背景下,虚拟货币法律属性的界定就成为刑法适用的基础性问题。根据我国现行法律的规定,虚拟货币不具有货币地位。虚拟货币具有双重属性:计算机数据是其物理属性,财产是其本... 详细信息

虚拟货币是网络科技不断发展的产物,在虚拟货币相关犯罪频发的背景下,虚拟货币法律属性的界定就成为刑法适用的基础性问题。根据我国现行法律的规定,虚拟货币不具有货币地位。虚拟货币具有双重属性:计算机数据是其物理属性,财产是其本质属性。虚拟货币可以解释为我国刑法保护的“财产”。对于非法获取虚拟货币的行为,以计算机犯罪进行规制存在一定的局限性和不合理之处。根据财产属性和行为方式选择适用不同的财产犯罪罪名,既符合非法获取虚拟货币行为的本质,也符合罪责刑相适应原则,还能妥善保护被害人的财产权益。在计算非法获取虚拟货币犯罪的犯罪数额时,以实施犯罪行为当天的交易均价为依据更为合适。

关键词：虚拟货币财产犯罪计算机犯罪犯罪数额

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对话思维在刑事公案中的运用

河南财经政法大学学报 2014年第5期29卷 92-98页

作者：任彦君河南财经政法大学刑事司法学院河南郑州450046

一个正当的法律决定必须通过理性的协商、交流与对话制度才能形成,把法律意义上的真理与通过沟通形成的共识联系起来。立法过程、诉讼程序的设计体现了对话协商的思想。在刑事公案的审理中,刑法规范的选择适用以及判决书的论证也应该以... 详细信息

一个正当的法律决定必须通过理性的协商、交流与对话制度才能形成,把法律意义上的真理与通过沟通形成的共识联系起来。立法过程、诉讼程序的设计体现了对话协商的思想。在刑事公案的审理中,刑法规范的选择适用以及判决书的论证也应该以对话思维方法为出发点,对各方观点包括民意进行辨析和鉴别,理性地吸收合理部分,使公案的判决达到合法性、合理性和可接受性的统一。对话思维的运用必须限制在刑法的框架内,就是说,对各方意见包括公众意见的吸收,都必须能够有相关的刑法规范作为依据。

关键词：对话思维公案共识民意可接受性

2000—2020年中国城乡食物消费碳-水足迹及其驱动因素分析

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农业工程学报 2024年第5期40卷 287-296页

作者：陈萱李绍亭任彦军西北农林科技大学经济管理学院杨凌712100 中德农业与食物经济研究中心杨凌712100

随着经济发展与城镇化快速推进,中国居民膳食模式发生显著转变,并产生了严重的资源环境后果。为识别城乡居民食物消费碳-水足迹的关键驱动因素,缓解水资源消耗,助力双碳目标实现,该研究测算并对比分析了中国31(30)省市2000—2020年城乡... 详细信息

随着经济发展与城镇化快速推进,中国居民膳食模式发生显著转变,并产生了严重的资源环境后果。为识别城乡居民食物消费碳-水足迹的关键驱动因素,缓解水资源消耗,助力双碳目标实现,该研究测算并对比分析了中国31(30)省市2000—2020年城乡居民人均食物消费碳-水足迹,通过对数平均迪式指数算法(logarithmic mean index method,LMDI)对碳-水足迹进行了驱动因素分解。结果显示:2000—2020年中国城镇人均食物消费碳足迹(水足迹)增加了29.63%(32.94%),农村碳足迹(水足迹)增加了4.59%(7.91%)。从空间演变来看,城镇人均食物消费碳-水足迹较高的地区由沿海省份逐渐扩散至内陆,而农村呈南北高-中间低的分布格局。从驱动因素来看,经济水平是城乡居民食物消费碳-水足迹增加的主要动因,且消费水平表现为抑制作用;人口城镇化驱动城镇居民食物消费碳-水足迹增加,而在农村起到抑制作用。该研究从促进食物消费结构转型,多渠道拓宽食物来源等方面提出建议,旨在促进中国城乡居民食物可持续消费。

关键词：食物消费碳足迹水足迹 LMDI分解 2000—2020年中国

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面向新时代的休闲场所设计

华中建筑 2000年第1期18卷 79-83页

作者：张勃任燕军唐子颖清华大学建筑学院

休闲作为人们生活的组成部分，其对社会健康发展的重要意义日益引起人们的重视。该文分析了当前我国城市居民休闲生活的若干现状和趋势，提出了在设计休闲场所、制定休闲政策等方面的原则性对策。

关键词：休闲场所城市设计文化型运动型实用型