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New Rural Community Construction or Retention Development:A Comparative Analysis of Rural Settlement transition mechanism in Plain Agriculture Area of China Based on Actor Network Theory

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Chinese Geographical Science 2024年第3期34卷 436-452页

作者： QU Yanbo DONG Xiaozhen MA Wenqiu ZHAO Weiying School of Public Administration and Policy Shandong University of Finance and EconomicsJinan 250014China Institute of Land Science and Policy Shandong University of Finance and EconomicsJinan 250014China College of Engineering China Agricultural UniversityBeijing 100083China

It is an important way to realize rural revitalization and sustainable development to guide rural settlement transition(RST)in an appropriate *** paper uses actor network theory(ANT)to construct a theoretical framework for the study of *** two typical villages with different transition paths in rural areas of North China Plain as examples,this paper reveals the mechanism of RST and makes a comparative *** results show that:1)after identifying problems and obligatory passage point,key actors recruit heterogeneous actors into the actor network by entrusting them with common interests,and realize RST under the system operation.2)Rural settlements under different transition paths have similarities in the problems to be solved,collective actions and policy factors,but there are differences in the transition process,mechanism and *** actor network and mechanism of RST through the path of new rural community construction are more complex and the transition effect is more *** contrast,the degree of RST of retention development path is limited if there is no resource and location advantage.3)Based on the applicable conditions of different paths,this paper designs a logical framework of‘Situation-Structure-Behavior-Result’to scientifically guide the identification of RST paths under the background of rural revitalization.

关键词： rural settlement transition(RST) actor network theory(ANT) transition path transition mechanism plain area China

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The active-to-passive oxidation transition mechanism and engineering prediction method of C/SiC composites

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Science China(Technological Sciences) 2013年第7期56卷 1403-1408页

作者： DENG DaiYing LUO XiaoGuang CHEN SiYuan YU JiJun AI BangCheng The Institute of Theoretical and Applied Aerodynamics China Academy of Aerospace Aerodynamics

This paper studied the active-to-passive oxidative mechanism of C/SiC composite under high temperature and oxidative conditions. An analytic model and computational method were established based on the process of gas diffusion in boundary layer and the equilibrium relations in surface chemical reactions. Simultaneously, an engineering equation to predict the oxygen partial pressure of active-to-passive transition was derived under the specific temperature zone. The results indicated that the active-to-passive oxidation transition of C/SiC is closely related to the composition of the material. At certain temperature and oxygen partial pressure conditions, the composite with high carbon content is prone to cause active oxidation which is negative to the oxidation resistance of the material.

关键词： C/SiC active oxidation passive oxidation transition mechanism

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Elastic-plastic-brittle transitions of potassium dihydrogen phosphate crystals:characterization by nanoindentation

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Advances in Manufacturing 2020年第4期8卷 447-456页

作者： Yong Zhang Ning Hou Liang-Chi Zhang Qi Wang School of Mechatronics Engineering Harbin Institute of TechnologyHarbin 150001People's Republic of China School of Mechatronics Engineering Shenyang Aerospace UniversityShenyang 110136.People's Republic of China Laboratory for Precision and Nano Processing Technologies School of Mechanical and Manufacturing EngineeringThe University of New South WalesSydneyNSW 2052Australia

Potassium dihydrogen phosphate(KDP)crystals are widely used in laser ignition facilities as optical switching and frequency conversion *** crystals are soft,brittle,and sensitive to external conditions(e.g.,humidity,temperature,and applied stress).Hence,conventional characterization methods,such as transmission electron microscopy,cannot be used to study the mechanisms of material ***,understanding the mechanism of plastic-brittle transition in KDP crystals is important to prevent the fracture damage during the machining *** study explores the plastic deformation and brittle fracture mechanisms of KDP crystals through nanoindentation experiments and theoretical *** results show that dislocation nucleation and propagation are the main mechanisms of plastic deformation in KDP crystals,and dislocation pileup leads to brittle fracture during *** experiments using various indenters indicate that the external stress fields influence the plastic deformation of KDP crystals,and plastic deformation and brittle fracture are related to the material's ***,the E l Ning Hou 13b908074@*** Liang-Chi Zhang ***@*** 1 School of Mechatronics Engineering,Harbin Institute of Technology,Harbin 150001,People's Republic of China 2 School of Mechatronics Engineering,Shenyang Aerospace University,Shenyang ***'s Republic of China'Laboratory for Precision and Nano Processing Technologies,School of Mechanical and Manufacturing Engineering,The University of New South Wales,Sydney,NSW 2052,Australia effect of loading rate on the KDP crystal deformation is practically *** results of this research provide important information on reducing machining-induced damage and further improving the optical performance of KDP crystal components.

关键词： Potassium dihydrogen phosphate(KDP)crystal transition mechanism Plastic deformation Brittle fracture

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重大工程由建设转向运维的过渡机制

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管理科学 2023年第10期

作者：薛小龙张鸣功王亮薛维锐张劲文

重大工程由建设阶段转向运维阶段的过渡期是重大工程全生命周期中具有独特属性的一个重要阶段，建立有效的过渡机制是实现建设到运维平稳过渡的重要保障。本文以港珠澳大桥由建设转向运维过渡阶段的成功管理实践作为研究对象，通过对过... 详细信息

重大工程由建设阶段转向运维阶段的过渡期是重大工程全生命周期中具有独特属性的一个重要阶段，建立有效的过渡机制是实现建设到运维平稳过渡的重要保障。本文以港珠澳大桥由建设转向运维过渡阶段的成功管理实践作为研究对象，通过对过渡阶段大量案例文本、田野调查以及访谈数据进行编码、聚类、迭代与归纳，凝练出了重大工程过渡机制的基本框架，该框架包括规则导向、组织适应、制度调节、技术支撑、人才战略与应急迭代6个方面26类管理构念；基于复杂系统管理思想，建立了包含复杂性与整体性两大维度，深度不确定性、技术复杂性、柔性与适应性、情景鲁棒性、环境耦合性、情景整体性、关联动态性、路径迭代性8类属性的重大工程过渡阶段复杂整体性认知框架，提炼出了多准则决策、组合式协调、跨边界交互、自适应协作4个方面的重大工程过渡阶段的融合界面管理策略。港珠澳大桥由建设转向运维过渡阶段创新性实践经验的理论提炼，既是对重大工程建设与运维管理理论的有益补充与完善，也是对具有中国特色重大工程管理理论话语体系的丰富与发展，对解决重大工程全生命周期管理中的重大实践问题具有重要指导意义。

关键词：重大工程运维管理过渡机制港珠澳大桥 megaproject operation and maintenance management transition mechanism Hong Kong-Zhuhai-Macao Bridge

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