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Path dependence or path creation of mature resource-based cities:A new firm entry perspective
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作者 孙慧娟 马丽 +1 位作者 金凤君 黄宇金 《Journal of Geographical Sciences》 SCIE CSCD 2024年第3期499-526,共28页
Firm entry plays an important role in the industrial transformation of mature resource-based cities.This study describes the industrial evolution of resource-based cities at the firm level and uses kernel density esti... Firm entry plays an important role in the industrial transformation of mature resource-based cities.This study describes the industrial evolution of resource-based cities at the firm level and uses kernel density estimation and econometric models to study the spatiotemporal characteristics and determinants of new firm entry from 2011 to 2019 in four mature resource-based cities.The results are summarized as follows:(1)New resource-based firm entry tends to be natural resource-oriented and path-dependent.The new non-resource-based firms show a high concentration in central urban areas,and the industry types are mainly wholesale and retail of resource products,cultural tourism,and equipment manufacturing.(2)Heterogeneous incumbent firms affect firm entry differently.Affected by competition and agglomeration effects,resource-based and non-resource-based incumbent firms have negative and positive impacts on new resource-based firm entry,respectively.Resourcebased incumbent firm agglomeration positively influences new non-resource-based firm entry.(3)Besides incumbent firms,firm entry can also be affected by multidimensional factors,such as factor costs,economic environment,and institutional environment.Research on new firm entry can better reveal the path dependence and path creation process of the industrial development of resource-based cities from a micro-perspective. 展开更多
关键词 mature resourced-based cities path dependence path creation new firm entry new non-resourced-based firms new resourced-based firms
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Existence of Solutions to Path-Dependent Kinetic Equations and Related Forward-Backward Systems
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作者 Vassili Kolokoltsov Wei Yang 《Open Journal of Optimization》 2013年第2期39-44,共6页
This paper is devoted to path-dependent kinetics equations arising, in particular, from the analysis of the coupled backward-forward systems of equations of mean field games. We present local well-posedness, global ex... This paper is devoted to path-dependent kinetics equations arising, in particular, from the analysis of the coupled backward-forward systems of equations of mean field games. We present local well-posedness, global existence and some regularity results for these equations. 展开更多
关键词 Kinetic Equation Mean Field Control Global EXISTENCE path dependence Nonlinear MARKOV Process Coupled Backward-Forward SYSTEMS
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Efficient method for measuring path dependence intensity of options
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作者 LIU Zhong-wen SHEN Chuan-he REN Cheng 《Chinese Business Review》 2007年第6期48-52,62,共6页
Based on the value sensitivity of options to underlying and corresponding treaty clauses, this paper poses a measuring method of path dependence intensity, which breaks the setup where the path dependence intensity is... Based on the value sensitivity of options to underlying and corresponding treaty clauses, this paper poses a measuring method of path dependence intensity, which breaks the setup where the path dependence intensity is only classified roughly and which becomes a deep study on path-dependent options. Then, its feasibility, instructions, and application to compare the path dependence intensity of sorts of options will be discussed. 展开更多
关键词 the value sensitivity OPTIONS path dependence intensity MEASUREMENT IMPROVEMENT
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The Path Dependence of Enterprise Strategic Adjustment and Its Transcendence Analysis
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作者 Ge Zhang 《经济管理学刊(中英文版)》 2019年第2期193-196,共4页
The world today is in a period of great development and integration of economy,information,and technology,especially the high-tech industries represented by big data,cloud computing,and artificial intelligence.It is p... The world today is in a period of great development and integration of economy,information,and technology,especially the high-tech industries represented by big data,cloud computing,and artificial intelligence.It is promoting the rapid increase of human productivity and leading the changes in various industries.Enterprises are facing more and more uncertain external environments.The previous organizational strategy,personnel structure,and operating strategies have been unable to adapt to the turbulent external environment,and innovation has become the norm.Therefore,how to find an innovative breakthrough point on the original strategic road on which to survive has become a matter of life and death.From the perspective of path dependence theory,this paper analyzes the characteristics of path dependence and transcendence path dependence during the adjustment of corporate strategy,and analyzes the internal causes and mechanisms of its generation with the help of the PEST model.Based on this,the negative impact of path dependence on the adjustment of the strategy was found.Furthermore,it was found above that the degree of transcendence path dependence in corporate strategic adjustment is determined by two factors:its ability to drive independent innovation in a dynamic environment and its ability to transform strategically.Finally,according to the research conclusions,it proposes countermeasures to overcome the path dependence of enterprises when adjusting their strategies,and provides suggestions for companies to find breakthrough points in disruptive innovation. 展开更多
关键词 path dependence Transcendence path dependence Enterprise Strategic Adjustment Independent Innovation TRANSFORMATION
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The Path Dependence of Enterprise Strategic Adjustment and Its Transcendence Analysis
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作者 Ge Zhang 《经济管理学刊(中英文版)》 2020年第1期37-40,共4页
The world today is in a period of great development and integration of economy,information,and technology,especially the high-tech industries represented by big data,cloud computing,and artificial intelligence.It is p... The world today is in a period of great development and integration of economy,information,and technology,especially the high-tech industries represented by big data,cloud computing,and artificial intelligence.It is promoting the rapid increase of human productivity and leading the changes in various industries.Enterprises are facing more and more uncertain external environments.The previous organizational strategy,personnel structure,and operating strategies have been unable to adapt to the turbulent external environment,and innovation has become the norm.Therefore,how to find an innovative breakthrough point on the original strategic road on which to survive has become a matter of life and death.From the perspective of path dependence theory,this paper analyzes the characteristics of path dependence and transcendence path dependence during the adjustment of corporate strategy,and analyzes the internal causes and mechanisms of its generation with the help of the PEST model.Based on this,the negative impact of path dependence on the adjustment of the strategy was found.Furthermore,it was found above that the degree of transcendence path dependence in corporate strategic adjustment is determined by two factors:its ability to drive independent innovation in a dynamic environment and its ability to transform strategically.Finally,according to the research conclusions,it proposes countermeasures to overcome the path dependence of enterprises when adjusting their strategies,and provides suggestions for companies to find breakthrough points in disruptive innovation. 展开更多
关键词 path dependence Transcendence path dependence Enterprise Strategic Adjustment Independent Innovation TRANSFORMATION
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Path-dependent speciation in dynamic fitness landscapes
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作者 Min-Lan Li Chao Wang Rui-Wu Wang 《Zoological Research(Diversity and Conservation)》 2024年第2期133-140,共8页
Species is a fundamental concept in evolutionary biology and biodiversity.However,existing species definitions are often influenced by artificial factors or are challenging in practical application,leading to confusio... Species is a fundamental concept in evolutionary biology and biodiversity.However,existing species definitions are often influenced by artificial factors or are challenging in practical application,leading to confusion in species classification.Due to uncertain environmental changes and random genetic drift,the fitness expectations of a population may shift,causing species to evolve to a new evolutionary state based on their current instantaneous fitness within a dynamic fitness landscape.This contrasts with the classic static fitness landscape,where fitness expectations are constant.In a dynamic fitness landscape,speciation may exhibit path dependence,where the evolution of traits follows a probabilistic path,creating feedback that shapes evolutionary trajectories.The path-dependent evolutionary mechanism suggests that species survival within an ecosystem is not directly determined by their fitness but by the probability of their evolutionary pathways.This model also indicates that species can coexist with varying probabilities under limited environmental pressures.Consequently,new species,cryptic species,or sympatric species may emerge via path-dependent evolutionary processes.Within this framework,we developed a mathematical species concept,which may guide future species classification methodologies. 展开更多
关键词 BIODIVERSITY Ecological/evolutionary model Fitness landscape Stochastic process path dependence
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The Algorithm of the Time-Dependent Shortest Path Problem with Time Windows
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作者 Nasser A. El-Sherbeny 《Applied Mathematics》 2014年第17期2764-2770,共7页
In this paper, we present a new algorithm of the time-dependent shortest path problem with time windows. Give a directed graph , where V is a set of nodes, E is a set of edges with a non-negative transit-time function... In this paper, we present a new algorithm of the time-dependent shortest path problem with time windows. Give a directed graph , where V is a set of nodes, E is a set of edges with a non-negative transit-time function . For each node , a time window ?within which the node may be visited and ?, is non-negative of the service and leaving time of the node. A source node s, a destination node d and a departure time?t0, the time-dependent shortest path problem with time windows asks to find an s, d-path that leaves a source node s at a departure time t0;and minimizes the total arrival time at a destination node d. This formulation generalizes the classical shortest path problem in which ce are constants. Our algorithm of the time windows gave the generalization of the ALT algorithm and A* algorithm for the classical problem according to Goldberg and Harrelson [1], Dreyfus [2] and Hart et al. [3]. 展开更多
关键词 Shortest path TIME-dependENT Shortest path ALT ALGORITHM A* ALGORITHM TIME WINDOWS
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Lexicalized Dependency Paths Based Supervised Learning for Relation Extraction 被引量:2
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作者 Huiyu Sun Ralph Grishman 《Computer Systems Science & Engineering》 SCIE EI 2022年第12期861-870,共10页
Log-linear models and more recently neural network models used forsupervised relation extraction requires substantial amounts of training data andtime, limiting the portability to new relations and domains. To this en... Log-linear models and more recently neural network models used forsupervised relation extraction requires substantial amounts of training data andtime, limiting the portability to new relations and domains. To this end, we propose a training representation based on the dependency paths between entities in adependency tree which we call lexicalized dependency paths (LDPs). We showthat this representation is fast, efficient and transparent. We further propose representations utilizing entity types and its subtypes to refine our model and alleviatethe data sparsity problem. We apply lexicalized dependency paths to supervisedlearning using the ACE corpus and show that it can achieve similar performancelevel to other state-of-the-art methods and even surpass them on severalcategories. 展开更多
关键词 Relation extraction dependency paths lexicalized dependency paths supervised learning rule-based models
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Preliminary research on the transmission path of nssSO_4^(2-) and NO_3^- in Antarctic ice sheet 被引量:1
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作者 张明军 李忠勤 +4 位作者 秦大河 效存德 杨惠安 康建成 李军 《Chinese Journal of Polar Science》 2001年第1期48-52,共5页
The main sources of nssSO 2- 4 and NO - 3 were summarized in this paper. By analyzing the spatial distribution features of major ions in Antarctic ice sheet and studying on the different time of the same volca... The main sources of nssSO 2- 4 and NO - 3 were summarized in this paper. By analyzing the spatial distribution features of major ions in Antarctic ice sheet and studying on the different time of the same volcanic event recorded by different ice cores from different regions in Antarctica, this paper intends to study the transmission path of nssSO 2- 4 and NO - 3. Results show that nssSO 2- 4 and NO - 3 are transmitted to the ice sheet through long distance and high altitude. The procedure of the transmission is that nssSO 2- 4 and NO - 3 are transmitted to the level between the top of troposphere and the bottom of stratosphere, then subsided to the ice sheet surface and spread to other regions. 展开更多
关键词 Antarctic ice sheet nssSO 2- 4 NO - 3 transmission path.
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Dependence Analysis for C Programs with Combinability of Dataflow Facts under Consideration
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作者 QIAN Ju XU Baowen +2 位作者 ZHOU Xiaoyu CHEN Lin SHI Liang 《Wuhan University Journal of Natural Sciences》 CAS 2009年第4期321-326,共6页
To avoid the precision loss caused by combining data- flow facts impossible to occur in the same execution path in dependence analysis for C programs, this paper first proposes a flow-sensitive and context-insensitive... To avoid the precision loss caused by combining data- flow facts impossible to occur in the same execution path in dependence analysis for C programs, this paper first proposes a flow-sensitive and context-insensitive points-to analysis algorithm and then presents a new dependence analysis approach based on it. The approach makes more sufficient consideration on the executa- ble path problem and can avoid invalid combination between points-to relations and between points-to relations and reaching definitions. The results of which are therefore more precise than those of the ordinary dependence analysis approaches. 展开更多
关键词 pointer analysis dependence analysis executable path
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Modeling of the loading path dependent magnetomechanical behavior of Galfenol alloy
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作者 江慧 朱洁 《Chinese Physics B》 SCIE EI CAS CSCD 2017年第3期527-534,共8页
The magnetomechanical behavior of single-crystal Galfenol alloy was found to be strongly dependent on the loading paths. An energy-based anisotropic domain rotation model, assuming that the interaction between domains... The magnetomechanical behavior of single-crystal Galfenol alloy was found to be strongly dependent on the loading paths. An energy-based anisotropic domain rotation model, assuming that the interaction between domains can be ignored and the probability of the magnetic moment pointing along a particular direction is related to the free energy along this direction, is used to simulate the magnetostriction versus magnetic field and stress curve and to track the magnetic domain motion trail. The main reason for loading path dependent effect is the rotation/flipping of the magnetic domains under different loading paths. The effect of loading and unloading paths on 90° magnetic domain motion was studied by choosing different loading and unloading state and paths. The results show that prior loading magnetic field can make the 90° magnetic domains flip to the directions of 45°domains because the magnetic field is the driving force to make the domains rotate, and the final loading state and the loading path both have great influence on the motion of 90° magnetic domains. 展开更多
关键词 magnetomechanical behavior loading path dependent 90° magnetic domain flipping
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Path Dependent Historical Development at Turkish Automotive Industry
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作者 SıtkıSelim Dolanay 《Sociology Study》 2022年第4期160-177,共18页
Turkey’s automotive industry has begun to occur at a much earlier date compared to other developing countries,through licensing agreements to establish automotive industrial facilities,by importing a kind of technolo... Turkey’s automotive industry has begun to occur at a much earlier date compared to other developing countries,through licensing agreements to establish automotive industrial facilities,by importing a kind of technology.Attempts have been made in order to produce the domestic automobile road providing sectoral developments could enter another technology pathway.Moreover,the inventor of a very early date in the Fordist production system,such as 1929 by Ford Motor Company with the license agreement,as if he could provide for setting up production facilities in Istanbul’s company,this bad experience has refrained for years from entering as a manufacturer Ford Motor Turkey market.Thus,while Turkey is an attractive market for car production,on the other hand,sufficient improvement over time in the production of trucks and other automotive products,such as buses has not been achieved.The 1929 experience seems to have been effective in terms of Turkey.Because,it was necessary to wait until 1971 for OYAK and TOFAŞto establish automobile assembly facility with license agreements.With the start of production of two automotive industry facilities,there has been a significant increase in sectoral production figures,but this increase trend has not been sufficiently supported by the government through the incentive system and in the late 1970s the production of the automotive industry has declined.For the first time in 1961,efforts were made to produce a completely domestic automobile,although the prototype of the revolutionary car was successfully produced,mass production could not be started.Subsequently,the production of the Anadol automobile for the second time was tried by means of technology transfer from multiple sources and the serial production of this automobile continued for a while.However,since fiber glass bodywork was used instead of hair bodywork and export opportunities could not be found,production was stopped completely in the end of 1980s.In the 1980s,automobile production continued in two assembly plants and product diversification was carried out to increase the production volume.In the 1990s,three new assembly facilities,Honda,Toyota and Hyundai,were established and the number of assembly production facilities in the country increased to five and technology loyalty based on technology imports continued.Until 2014,the automotive industry continued to consist of five automobile assembly plants and other automotive products assembly plants.In 2015,it was announced to the public that a new domestic car prototype was produced.It was announced that the project will start mass production in 2019.However,it was determined that the prototype would be re-manufactured at the end of 2019 by making changes in the project and that it would be possible to start mass production in 2022.Thus,it is understood that the efforts to start mass production since 2015 can be concluded in 2022,i.e.7 years after the first prototype was produced.It can 161produce prototypes in a short period of four months in Turkey in 1961,as evidenced by an indication of the dependency on a long time wasting which is not technology importation pathway,such as five years.How to break the path of devotion demonstrates that it is a difficult job.Path dependency is thought to result from the education system. 展开更多
关键词 automotive industry import of technology technology transfer domestic automobile automotive industry production path dependency education system
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Path Individuation and Retrospective Grounding
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作者 ZHENG Yujian 《自然辩证法通讯》 北大核心 2025年第12期37-51,共15页
This paper purports to expound a special(technical)notion of paths.A neglected fundamental fact(especially under indeterminism)is that the path-dependent direction of any diachronic outcome is backward,i.e.,later step... This paper purports to expound a special(technical)notion of paths.A neglected fundamental fact(especially under indeterminism)is that the path-dependent direction of any diachronic outcome is backward,i.e.,later steps depend on earlier ones successively,despite the ineradicable chance in their respective formation.In this paper,a token-oriented retrospective approach is proposed to overcome the limitation of the type-oriented approach in explaining path-related phenomena.My argument for the validity and utility of this approach is largely based on the elements of(PD),a definitional schema for diachronic sequences subject to a recursive counterfactual formula.I explore certain aspects of path individuation that have so far not been discussed,despite(PD)’s formal congeniality with Lewis’s‘causal chain’.Two basic patterns of path generation are examined:the first is for distinguishing actual vs possible branching paths,while the second introduces a metaphysical theme regarding the retrospective grounding of the causal status of an upstream event by its downstream(joint)effect.A central example of the paper,viz.,the Gobang game,is used to illustrate how the token-oriented approach works for path individuation. 展开更多
关键词 path individuation Retrospective grounding Token-oriented approach path dependence Diachronic difference making
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中国城市创业活跃度时空演化及区位选择特征分析——基于“城市-区域-行业”三维视角 被引量:1
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作者 吕鹏 董亚宁 郭杰浩 《工业技术经济》 北大核心 2025年第3期108-119,共12页
创业是促进市场主体创新、改善民生、推动经济高质量发展的重要途径。本文基于2011~2023年283个城市新注册企业数据从城市、区域和行业3个维度研究城市创业活跃度水平时空演化和区位选择特征。研究发现:(1)城市创业活跃度以2015年为时... 创业是促进市场主体创新、改善民生、推动经济高质量发展的重要途径。本文基于2011~2023年283个城市新注册企业数据从城市、区域和行业3个维度研究城市创业活跃度水平时空演化和区位选择特征。研究发现:(1)城市创业活跃度以2015年为时间节点呈现“两阶段”特征,与宏观经济增长趋势相似;(2)呈现“东北-西南”方向展布且重心逐渐向东南移动,空间差距不断扩大,四大板块间差距是其主要来源;(3)各行业创业活跃度均有提升,但空间极化和敛散性特征存在行业异质性;(4)创业区位选择特征分析表明,不同规模城市、除农业外的其他行业以及除东北之外的其他区域均存在数智导向;经济基础导向主要存在于中、小城市、东、西部地区以及非制造业、生产和生活性服务业;生产性服务业存在劳动力导向;技术导向存在于中、小城市、西部地区和除农业外的其他行业;小城市、西部地区、非制造业、生活性和公共服务业还存在资本导向。本文研究发现为促进创业政策制定提供了一定经验依据。 展开更多
关键词 创业活跃度 时空演化特征 行业异质性 创业区位 要素密集 数智水平 经济增长 路径依赖
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利用DPRNN实现交织重数未知的ADS-B信号分离
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作者 王文益 王建设 《中国民航大学学报》 2025年第3期75-80,共6页
多条信号之间的交织是广播式自动相关监视(ADS-B,automatic dependent surveillance-broadcast)系统中不可避免的问题。已有的单天线ADS-B信号解交织方法,大多需要精确的估计交织重数、相对时延等参数,相应的估计精度往往严重影响最终... 多条信号之间的交织是广播式自动相关监视(ADS-B,automatic dependent surveillance-broadcast)系统中不可避免的问题。已有的单天线ADS-B信号解交织方法,大多需要精确的估计交织重数、相对时延等参数,相应的估计精度往往严重影响最终的分离性能。为解决该问题,本文利用双路径递归神经网络(DPRNN,dual-path recurrent neural network)在无须估计任何参数的前提下对ADS-B接收信号进行分离。网络输入为交织重数未知的ADS-B接收信号,包括纯噪声信号、无交织信号、两重交织信号和三重交织信号。网络固定输出3条信号,当交织信号中包含i条ADS-B信号时,对应的源信号包含i条ADS-B信号和(3-i)条噪声信号。仿真实验证明,当信号的交织重数不大于三重时,分离正确率达到95%以上。这一研究为ADS-B信号交织分离提供了一种新的解决方案,具有一定的实用价值。 展开更多
关键词 广播式自动相关监视(ADS-B) 信号交织 信号分离 双路径递归神经网络
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节日“涌生”与对舞台化路径依赖的超越——基于在场经验的元阳火把节文化生成研究
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作者 马翀炜 凤杰 《湖北民族大学学报(哲学社会科学版)》 北大核心 2026年第2期72-81,共10页
通过舞台化节日实践激活乡村文化的行动,促生了节日“涌生”现象。舞台化正逐渐成为传承传统文化的路径依赖。本文基于对云南元阳县村寨原生节日、广场舞台节日与梯田实景节日三种火把节形式的考察,揭示了节日从日常生活场域向表演化空... 通过舞台化节日实践激活乡村文化的行动,促生了节日“涌生”现象。舞台化正逐渐成为传承传统文化的路径依赖。本文基于对云南元阳县村寨原生节日、广场舞台节日与梯田实景节日三种火把节形式的考察,揭示了节日从日常生活场域向表演化空间转变的过程及其张力。文章认为,节日不仅是文化展演的载体,更是人们体验“在场”、重构社会联结与文化意义的存在性事件。在此意义上,力图创新的梯田实景火把节,虽仍未摆脱舞台化路径,却在村民的具身参与中蕴含着超越舞台中心主义的文化可能性。要真正超越舞台化路径依赖,人们应更加关注节日“共生主体”行动的生成机制,探索传统节日重新嵌入生活世界的方式,进而迈向更具生命力的乡村文化振兴之路。 展开更多
关键词 节日“涌生” 火把节 舞台化 路径依赖 共生主体
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我国师范生公费教育政策变迁的历史嬗变、逻辑与启示
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作者 顾拓宇 《黑龙江高教研究》 北大核心 2026年第3期106-112,共7页
师范生公费教育政策是加强教师队伍的重要环节,是提质基础教育师资队伍的重要外力。新中国成立以来,我国师范生公费教育政策经历了免费、收费、免费、公费等四个阶段。基于历史制度主义视角分析发现,经济、政治、文化等深层结构制约着... 师范生公费教育政策是加强教师队伍的重要环节,是提质基础教育师资队伍的重要外力。新中国成立以来,我国师范生公费教育政策经历了免费、收费、免费、公费等四个阶段。基于历史制度主义视角分析发现,经济、政治、文化等深层结构制约着师范生公费教育政策的基本脉络;报酬递增、政治偏好、初始事件等规约着师范生公费教育政策的路径轨迹;个体、学校、政府等行动主体对师范生公费教育政策具有推动作用。在新时代,我国师范生公费教育政策设计应考虑宏观环境变量,设置与政治、经济、文化需求相一致的政策,增强政策的适应性;适时调整政策,增强政策的有效性;设置多元化政策,满足不同主体的利益需求,增强政策的多样性。 展开更多
关键词 师范生公费教育政策变迁 历史制度主义 深层结构 路径依赖 动力机制
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破除消费限制政策:“十五五”时期提振消费的关键突破
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作者 张颖熙 李秋然 《河北学刊》 北大核心 2026年第2期25-31,共7页
消费作为最终需求,是畅通国民经济循环的关键环节,也是构建新发展格局的重要基础。在外部环境复杂变化、国内投资增长趋缓的背景下,进一步释放消费潜力具有重要现实意义。然而,当前消费领域仍存在结构性限制性政策,在需求侧与供给侧两... 消费作为最终需求,是畅通国民经济循环的关键环节,也是构建新发展格局的重要基础。在外部环境复杂变化、国内投资增长趋缓的背景下,进一步释放消费潜力具有重要现实意义。然而,当前消费领域仍存在结构性限制性政策,在需求侧与供给侧两个层面形成多重掣肘,不仅抑制居民消费意愿与消费能力释放,也制约消费供给扩张与结构升级,削弱了消费循环的内生动力。这些限制性政策并非单一因素所致,而是更多源于制度设计的路径依赖、治理理念的惯性延续以及利益协调机制的内在约束。面向“十五五”时期提振消费的新要求,应从优化制度供给入手,推进分类监管,完善运行机制,培育新型消费业态,破除市场壁垒,健全配套保障体系,推动消费治理模式由“管控型”向“引导型”转型,在扩大内需与激发供给创新之间实现良性互动,为消费高质量发展提供持续制度动力。 展开更多
关键词 消费限制性政策 制度路径依赖 内需潜力释放 消费治理转型 高质量发展
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依附型路径:中部地区乡村振兴的特征、起因及其转换
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作者 符平 李国卉 《山西师大学报(社会科学版)》 2026年第2期22-31,共10页
东部乡村振兴形成了以“整合—创新”为动力、自下而上的自主型路径。相比之下,中部乡村受限于工业化不足、城镇化浅层化、市场发育程度低以及人口外流比重高,中部乡村振兴呈现出以“匮乏—输入”为特征的依附型路径,主要依赖自上而下... 东部乡村振兴形成了以“整合—创新”为动力、自下而上的自主型路径。相比之下,中部乡村受限于工业化不足、城镇化浅层化、市场发育程度低以及人口外流比重高,中部乡村振兴呈现出以“匮乏—输入”为特征的依附型路径,主要依赖自上而下的外部力量推动。尽管缺乏先发优势,但中部乡村仍具备自然资源丰富和劳动力丰裕等初级要素的比较优势,同时在制度政策、生产组织、技术信息等方面蕴藏着潜在的后发优势。在“促进中部地区崛起”战略的推动下,中部乡村应致力于构建动态的比较优势和后发优势,推动发展路径从依附型向“嵌入的自主型”转型,并最终实现向全面自主型路径的跃升。 展开更多
关键词 中部崛起 中部乡村 乡村振兴 依附型路径 自主型路径
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时变路网下考虑碳排放的冷链配送路径优化
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作者 程元栋 丁晨阳 《山东交通学院学报》 2026年第1期34-43,72,共11页
针对冷链物流运输成本较高、货损率较大及碳排放突出等问题,基于时变路网,综合考虑冷藏车固定使用成本、运输成本、制冷成本、货损成本、时间惩罚成本以及碳排放成本等,构建以总成本最小化为目标的生鲜产品冷链配送路径优化模型。通过... 针对冷链物流运输成本较高、货损率较大及碳排放突出等问题,基于时变路网,综合考虑冷藏车固定使用成本、运输成本、制冷成本、货损成本、时间惩罚成本以及碳排放成本等,构建以总成本最小化为目标的生鲜产品冷链配送路径优化模型。通过引入基于时间窗中心值与空间位置节约值的初始化策略、自适应参数控制机制、多层次局部搜索策略,并结合天鹰优化算法的全局搜索策略,提出改进非洲秃鹫优化算法,用于求解模型。仿真算例结果表明:在考虑碳排放成本的情况下,改进非洲秃鹫优化算法的总成本比原始非洲秃鹫优化算法降低约25.7%,所需车辆数从9辆减至7辆;目标函数中考虑碳排放成本时的配送总成本比忽略碳排放成本时降低约1.13%;改进非洲秃鹫优化算法的路径寻优能力显著优于传统算法,在兼顾碳排放成本的同时优化配送路径,达到物流成本降低与低碳配送的目标,为冷链物流配送路径优化提供有效解决方案。 展开更多
关键词 冷链物流 时变路网 路径优化 碳排放 非洲秃鹫优化算法
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