系统论视角下CBE模式的成功因素分析及启示

CBE模式的开发理念、方法与过程等都对后继的教育改革产生了深远影响,并得到了广泛应用。文章以系统论为研究视角,将CBE模式看作信息加工的过程,分析了环境、制度、实施过程、评价主体等要素以及要素间的相互关系,并试图在市场需求分析以及企业和行业协会的参与作用方面进行创新,为更好借鉴CBE模式提供参考依据。     

Are aquaculture growth policies in high-income countries due diligence or illusionary dreams? Foreseeing policy implications on seafood production in Singapore

In the beginning of 2019, the Singaporean government announced its desire to increase domestic food production and, in particular, aquaculture to reach 30% of self-sufficiency by 2030. Similar policies aiming at encouraging aquaculture growth abound in high-income countries in recent years, but have had limited success. Hence, this paper investigates the potential implications of such policies to foresee consequences beforehand and improve the policy’s chances of success. Three scenarios of aquaculture development are built for Singapore until 2040, among which a business-as-usual scenario and two explorative scenarios aiming at increasing aquaculture production, the first emphasizing existing technologies and the second giving priority to novel and innovative ones, like recirculating aquaculture systems. These scenarios are assessed using an adapted version of the supply-demand partial equilibrium model Asiafish to challenge their viability in the socioeconomic context of Singapore. Only the two explorative scenarios are found to allow the Singaporean government to reach its goal in terms of seafood self-sufficiency by 2030, one of which appears to have strong advantages. In this scenario, imports decrease by 28% by 2040, seafood self-sufficiency reaches 69% and 90% of all aquaculture originates from innovative technologies, which would make Singapore an aquaculture tech-hub. It also has higher benefits within Singapore environmental, social and economic constraints such as land and aquafeed scarcity.     

Determining the optimal dimension of a work-in-process storage area

We study the problem of determining the optimal dimension of a work-in-process storage area in a two-line production system with delays and breakdowns. We propose a stochastic model and prove theoretical results that allow us to implement an exact algorithm for the solution of the model. We optimally solve a real instance and carry out a sensitivity analysis to evaluate if the optimal solution is stable when the initial data are perturbed.     

结构调整与技术进步对碳排放影响的空间效应分析

对1997～2012年中国分省域碳排放的数据进行详细测算,发现碳排放具有明显的空间相关性。利用空间面板数据模型分析发现,单位国内生产总值（GDP）能耗和能源结构碳强度对碳排放的影响较为突出。通过检验发现建立空间杜宾模型是最优的。结论：进一步加快产业结构优化升级,培育优势创新产业集群,推广清洁技术的利用,改善以煤炭为主不合理的一次能源消费结构,并充分考虑区域间的集聚效应,在碳减排活动中充分加强区域协作。     

区域技术创新能力影响因素的实证分析——基于全国30个省市区的面板数据

区域技术创新能力的影响因素是理论界尚未系统深入探讨的问题。本文在阐明技术创新机理的基础上,运用经过改进的格瑞里茨和杰菲的知识生产函数模型,对2005—2007年我国30个省市区三大技术创新主体投入产出面板数据进行技术创新能力影响因素的实证分析,并把市场化因素首次设为虚拟变量引入模型考察其作用。分析结果表明,中国区域技术创新二次产出存在多样化差异,R&D在技术创新主体之间和内部的配置,以及创新主体内外制度性因素对技术创新的绩效有重要影响。因此,提高区域技术创新能力需要优化R&D配置和进行技术创新主体的体制机制创新。     

自然垄断产业垄断的"自然性"探析

一般认为,在自然垄断产业中的竞争性业务领域中,应当放松管制,引入竞争,而网络部分的生产经营则依然是自然垄断的领域,政府在这一领域仍然要实行进入管制,限制竞争,以获取规模经济或范围经济带来的利益。本文认为,在自然垄断领域中是否应当保持进入管制政策,不能简单地按照传统的理论假设进行推论,而是要对有关产业管制的成本和收益进行实证分析。本文提出了应当在自然垄断领域内引入竞争的理论假说,并用电信产业的统计数据对这个假说的理论模型进行了验证。     

对改革供电企业变电检修现行管理模式的探讨

提出了重组专业化的变电检修总公司的战略思路,对电网企业与总公司之间发展新型关系进行了探讨,指出以战略思维构筑战略联盟,保持合作联盟,实现共赢与发展.分析虽是对检修体制改革,同时也是对安全生产管理体制的变革,有利于供电企业的安全生产管理.     

上市公司现金持有:权衡理论还是啄食理论

本文根据2000—2005年沪深股市586家A股上市公司的数据,考察了上市公司现金持有比率的决定因素。实证发现投资水平、资产负债率、现金替代物与现金持有比率负相关,债务期限结构和每股股利与现金持有比率正相关,现金流、企业规模、现金流波动率和财务实力的影响随不同的成长性而不同。实证结论更多地支持了啄食理论。     

Twists and turns of triadic business relationship recovery

This study focuses on triadic business relationship recovery processes through a single case study. We address the question of what kind of process takes place when a business relationship on the verge of ending is recovered and what roles a third actor can play in the process. As a result, we model a process through which a triadic business relationship is recovered and attraction, trust, and commitment are restored.