基于Android平台的保健食品移动监管系统

针对保健食品企业监管效率低以及管理模式的不健全, 提出一种基于Android平台的移动监管系统模式. 智能终端设备通过连接3G、4G等无线网络, 使监管人员在执法现场将采集的信息数据直接上传至服务器, 同时增设数据同步代理机制, 实时监听用户的离线和在线状态, 防止数据丢失, 再利用蓝牙无线通信技术实现监管数据的后台打印功能, 进一步简化执法流程. 本系统的应用实现了移动监管和移动办公的模式, 具有实际应用价值.     

Food-water security and virtual water trade in the Middle East and North Africa

The purpose of this study is to analyze the political economy of food-water security in the water-scarce Middle East and North Africa region. The study deploys the lens of virtual water trade to determine how the region's economies have met their rising food-water requirements over the past three decades. It is shown that the region's water and food security currently depend to a considerable extent on water from outside the region, ‘embedded’ in food imports and accessed through trade. The analysis includes blue (surface and groundwater) and green water resources.     

Establishing spatial trends in water chemistry and stable isotopes (δ15N and δ13C) in the Elwha River prior to dam removal and salmon recolonization

Two high‐head dams on the Elwha River in Washington State (USA) have changed the migratory patterns of resident and anadromous fish, limiting Pacific salmon to the lower 7.9 km of a river that historically supported large Pacific salmon runs. To document the effects of the dams prior to their removal, we measured carbon and nitrogen stable isotope ratios of primary producers, benthic macroinvertebrates, and fish, and water chemistry above, between and below the dams. We found that δ¹⁵N was significantly higher in fish, stoneflies, black flies, periphyton and macroalgae where salmon still have access. Fish and chloroperlid stoneflies were enriched in δ¹³C, but the values were more variable than in δ¹⁵N. For some taxa, there were also differences between the two river sections that lack salmon, suggesting that factors other than marine‐derived nutrients are structuring longitudinal isotopic profiles. Consistent with trophic theory, macroalgae had the lowest δ¹⁵N, followed by periphyton, macroinvertebrates and fish, with a range of 6.9, 6.2 and 7.7‰ below, between, and above the dams, respectively. Water chemistry analyses confirmed earlier reports that the river is oligotrophic. Phosphorous levels in the Elwha were lower than those found in other regional rivers, with significant differences among regulated, unregulated and reference sections. The removal of these dams, among the largest of such projects ever attempted, is expected to facilitate the return of salmon and their marine‐derived nutrients (MDN) throughout the watershed, possibly altering the food web structure, nutrient levels and stable isotope values that we documented. Published in 2010 by John Wiley & Sons, Ltd.     

Food security problems in sub-Saharan Africa: Operations Research as a tool of analysis

For many years, the author has been involved in teaching and research in the use of Operations Research as a tool of analysis to study food security problems in sub‐Saharan Africa, in particular, grass root problems of poor farmers. The paper presents an introduction to the way Operations Research methods have been applied in case studies and research projects, and discusses in retrospect the author's views on the strengths and limitations of the application of Operations Research. The paper has in particular been written for people who are not familiar with applications of Operations Research in agriculture, and are interested to learn about its potential usefulness in practice. The retrospective part is largely based on food security studies in e.g. Tanzania, Burkina Faso, Bénin, Togo and Eritrea and on participation in several interdisciplinary research programmes in Africa.     

新的仿生算法:蟑螂算法

通过模拟蟑螂的觅食行为,提出蟑螂算法(Cockroach Swarm Optimization,CSO)。算法充分利用了蟑螂社会的平等特性和群体智慧。食物再分配、回巢等策略的使用使算法具有较强的全局搜索和局部搜索能力。以TSP问题为例对算法进行仿真测试,实验证明算法有效且优于存在的离散粒子群算法(Discrete Particle Swarm Optimization,PSO)。     

Optimal markdown policy of perishable food under the consumer price fairness perception

Markdown policies are widely used by retailers to sell perishable food. Consumers purchase food at different prices during different sales periods. Some consumers may compare their experience with others who purchase the same items. Price unfairness or inequity is perceived when different prices are quoted without reasonable explanations. This study develops an optimal markdown model for perishable food pricing to optimise the food retailer revenue and enable a maximum aggregated consumer utility considering individuals’ price fairness perception. The model serves as the first step in evaluating trade-offs between food retailer revenue and consumer utility. In addition, it enables consumer utility to be depicted through perceived price fairness by including the effects of food perishability and scarcity. Another innovative feature is the equalisation of the consumer average aggregated utility during different sales periods as a condition of intertemporal price fairness perception. The proposed model is compared with two benchmark models to justify the effectiveness and advantages in the example. Finally, a sensitive analysis based on the food deterioration rate, consumer food desire rate and consumer average reservation price is conducted to justify the manner in which these factors influence the optimal pricing policy, and managerial insights are suggested for food retailers.     

聚氯乙烯食品接触材料中稀土热稳定剂检测方法探讨

广大消费者越来越关注食品安全问题.聚氯乙烯食品接触材料通常情况下不稳定,需加入热稳定剂使其不易见热分解,而这些热稳定剂有可能迁移入食品中,致使使用者出现毒物反应.本文依据检验工作实践,对PVC食品接触材料中稀土热稳定剂检验方法进行了探讨,并提出了需注意的问题.     

海洋食品微生物生长智能通用预测平台

针对海洋食品对虾生产加工的特点,设计与开发了对虾生产加工中微生物生长智能通用预测平台,为海洋食品的安全生产与加工提供分析手段。     

餐饮服务网站的总体规划及平台系统设计

采用ASP．NET＋SQL SEVER数据库结合的解决方案来完成对系统前台功能模块和后台管理模块的操作口。采用人机对话的操作方式,全面实现网上餐饮服务。对用户输入的数据,系统进行严格的数据检验,尽可能排除人为的错误．尽可能的维护系统的稳定和安全可靠日。在采用了新技术新方法的基础上为用户提供了最方便的平台。     

Research on the Application of Essential Information Technology in Food Safety Supply Chain

I. INTRODUCTION Along with the economical rapid development and the living standard unceasing enhancement, the consumer request to food quality in a new stair, food consumption pattern has assumed multiplex development tendency, food demand pattern transforms into "the multi- varieties, guarantees safety". Food no longer only is essential item which satisfies life needs; the consumer attention to food from the quantity moves towards the credit level, food security problem appears. How doe…