美欧日转基因食品监管法律制度分析及启示

转基因食品监管既关系到转基因食品产业的发展,也与消费者的权益保护息息相关。目前世界范围内转基因食品监管主要存在三种法律制度：美国、欧盟和日本的转基因食品监管制度。通过对美、欧、日转基因食品监管原则、监管主体、标识制度等的比较分析,了解三种制度存在差异的原因,从而得出启示：我国在转基因食品监管时也应立足我国利益保护,从我国传统文化和民众观念的实际出发,选择合适的监管模式,进行适度监管。     

固定分区下随机需求IRP问题最优策略及算法

随机需求库存-路径问题(stochastic demand inventory routing problem,SDIRP)是典型的NP难题,考虑随机需求环境下供应链中库存与配送问题的协调优化,是实施供应商管理库存策略的关键所在.文章的研究基于固定分区策略(fixed partition policy,FPP),在FPP下客户被分为若干个服务区域,在同一区域中的所有客户均被同时配送.根据分区策略对配送以及库存成本的影响提出了基于修正C-W节约算法的客户分区算法,证明了各区域的最优库存策略为(s,S)形式,分区内各客户的库存策略为order-up-to形式,进而设计了求解FPP下SDIRP最优策略的算法.最后,通过数值算例验证了该算法的有效性以及FPP的适用性.     

中国网民如何看待转基因食品？——基于启发-系统式模型的态度解释

对转基因食品的态度关乎转基因技术能否健康发展。立足中国网民这一群体，采用启发-系统式模型对网民的转基因食品态度进行解释。结合2017年的网民社会意识调查数据，研究发现启发式路径相比系统式路径对态度有着更强的解释力；两条路径中的对应要素多呈分段式影响，以中立态度为参照，除民族主义具备恒定的态度抑制效果，政治信任仅显著影响网民的反对态度发生率，受教育程度仅显著影响支持态度发生率，非官方信息接触则展现出“双刃剑”效果。     

战略性环境政策在转基因农产品贸易中的作用机理及启示

本文从战略性环境政策的理论介绍出发,结合转基因农产品在国际贸易中的争论,分析了战略性环境政策在转基因农产品国际贸易中的作用机理,并探讨了其对我国相关产业发展的启示。     

Hostile media perceptions and consumption of genetically modified and organic foods: Examining the mediating role of risk-benefit assessments

Drawing upon the hostile media effect, this study examined how perceived media bias in covering genetically modified (GM) food influences individuals’ risk–benefit assessments of it and their food consumption behaviors. The results of a nationally representative survey (N = 1364) showed that individuals seeing media coverage as more biased in favor of GM food perceived it as more hazardous, which was related to a higher proportion of organic food consumption in their diets. In contrast, perceived media coverage as less slanted toward GM food was associated with more benefit perceptions of it, thereby predicting its higher proportion in individuals’ diets. More importantly, the indirect effect of perceived media bias on GM food consumption through benefit perceptions was more pronounced among males than females. The findings of this study not only provide empirical evidence of the perceptual and behavioral outcomes of hostile media perceptions, but also offer valuable insights for journalists and education practitioners to improve public understanding of emerging food technologies.