This paper applied the safety reliability of food cold chain logistics to establish reliability allocation model for cold chain systems, designed optimization algorithms, and made a case analysis. By applying system r...This paper applied the safety reliability of food cold chain logistics to establish reliability allocation model for cold chain systems, designed optimization algorithms, and made a case analysis. By applying system reliability allocation principle, this article firstly built safety reliability allocation model of food cold chain logistics system without cost constraint based on the safety reliability model of food cold chain logistics system, and then it set up optimal decision- making model of food cold chain logistics system with cost constraint using the functional relationship between the time, temperature of cold chain logistics and logistics costs. Next, according to the characteristics of the model, a heuristic algorithm was proposed to allocate safety reliability of the system to each cold chain unit so as to achieve the goal of operatingcosts optimization subject to assurance ofoverall safety reliability of the cold chain system. Taking the safety impact factor of food cold chain unit as a weight, the article also deduced the equation of reallocation of safety reliability of food cold chain system. In the end, these models were used to optimize the allocation of safety reliability in an example of Sushi cold chain process. It provided a new thought and method to optimally plan the unit safety of food cold chain system as well as reduce the cost of food cold chain.展开更多
目的建立可用于冷链即食食品生产加工环境中李斯特氏菌属的分离与检测方法,对生产企业的环境进行监控。方法本研究结合美国食品药品监督管理局-细菌学分析手册(Food and Drug Administration Bacteriological Analytical Manual,FDA-BAM...目的建立可用于冷链即食食品生产加工环境中李斯特氏菌属的分离与检测方法,对生产企业的环境进行监控。方法本研究结合美国食品药品监督管理局-细菌学分析手册(Food and Drug Administration Bacteriological Analytical Manual,FDA-BAM)单增李斯特氏菌检测方法,通过制备冻干定量菌球模拟增菌实验,对增菌液中萘啶酮酸和吖啶黄素的添加时间、头孢曲松钠的添加浓度进行研究,确定最佳增菌方式和头孢曲松钠浓度,并将其应用到实际冷链即食食品生产企业环境中李斯特菌属的分离检测中。结果3种李斯特氏菌属和背景菌的冻干菌球的浓度分别为120 CFU/球和1100 CFU/球。通过模拟增菌实验,延后4 h使用添加剂,可使李斯特氏菌属及单增李斯特氏菌的检出率均提高10%,在此基础上头孢曲松钠添加量在6~8μg/mL时,李斯特氏菌属及单增李斯特氏菌的检出率均为100%。结论该方法可提高李斯特氏菌属的检出率。为冷链即食食品生产企业的环境监控提供了技术保障。展开更多
文摘This paper applied the safety reliability of food cold chain logistics to establish reliability allocation model for cold chain systems, designed optimization algorithms, and made a case analysis. By applying system reliability allocation principle, this article firstly built safety reliability allocation model of food cold chain logistics system without cost constraint based on the safety reliability model of food cold chain logistics system, and then it set up optimal decision- making model of food cold chain logistics system with cost constraint using the functional relationship between the time, temperature of cold chain logistics and logistics costs. Next, according to the characteristics of the model, a heuristic algorithm was proposed to allocate safety reliability of the system to each cold chain unit so as to achieve the goal of operatingcosts optimization subject to assurance ofoverall safety reliability of the cold chain system. Taking the safety impact factor of food cold chain unit as a weight, the article also deduced the equation of reallocation of safety reliability of food cold chain system. In the end, these models were used to optimize the allocation of safety reliability in an example of Sushi cold chain process. It provided a new thought and method to optimally plan the unit safety of food cold chain system as well as reduce the cost of food cold chain.
文摘目的建立可用于冷链即食食品生产加工环境中李斯特氏菌属的分离与检测方法,对生产企业的环境进行监控。方法本研究结合美国食品药品监督管理局-细菌学分析手册(Food and Drug Administration Bacteriological Analytical Manual,FDA-BAM)单增李斯特氏菌检测方法,通过制备冻干定量菌球模拟增菌实验,对增菌液中萘啶酮酸和吖啶黄素的添加时间、头孢曲松钠的添加浓度进行研究,确定最佳增菌方式和头孢曲松钠浓度,并将其应用到实际冷链即食食品生产企业环境中李斯特菌属的分离检测中。结果3种李斯特氏菌属和背景菌的冻干菌球的浓度分别为120 CFU/球和1100 CFU/球。通过模拟增菌实验,延后4 h使用添加剂,可使李斯特氏菌属及单增李斯特氏菌的检出率均提高10%,在此基础上头孢曲松钠添加量在6~8μg/mL时,李斯特氏菌属及单增李斯特氏菌的检出率均为100%。结论该方法可提高李斯特氏菌属的检出率。为冷链即食食品生产企业的环境监控提供了技术保障。