With the rapid development of the wind generation,uncertainties of random wind and load bring some inevitable impacts on the security of power system. Once the uncertainty causes line power to exceed its limit, line o...With the rapid development of the wind generation,uncertainties of random wind and load bring some inevitable impacts on the security of power system. Once the uncertainty causes line power to exceed its limit, line overload will occur. The paper presents the risk control of transmission line overload for windintegrated power systems. Firstly, a risk control model of line overload is proposed considering the uncertainties of loads,generator outputs and wind powers. The generation cost and security level of system associated with overload can be optimally controlled. Then path following interior point method is employed to carry out the optimal control. Finally the simulation is made on the modified IEEE-30 bus system. Results show that the risk of line overload is effectively reduced through the optimization of control variables.展开更多
The safety and risk management of cosmetic products runs through the entire life cycle of the product. The author focuses on the safety of cosmetic products, starting from the three stages of cosmetics research and de...The safety and risk management of cosmetic products runs through the entire life cycle of the product. The author focuses on the safety of cosmetic products, starting from the three stages of cosmetics research and development, production and sales, pointing out the key control points at each stage, aiming to provide a reference for cosmetics companies to develop products.展开更多
随着经济的发展和社会的进步,快节奏的生活方式使得预制菜食品受到越来越多消费者的关注和青睐。近年来,预制菜行业发展迅速,并保持高速增长态势,发展潜力巨大,但也凸显出一些问题。本文对预制菜产业发展现状进行论述,探讨预制菜发展前...随着经济的发展和社会的进步,快节奏的生活方式使得预制菜食品受到越来越多消费者的关注和青睐。近年来,预制菜行业发展迅速,并保持高速增长态势,发展潜力巨大,但也凸显出一些问题。本文对预制菜产业发展现状进行论述,探讨预制菜发展前景,并对消费者普遍关注的预制菜食品标准问题和安全问题进行全面分析。结合预制菜行业发展实际情况,提出逐步建立健全标准体系、在生产过程中实施危害分析和关键控制点(Hazard Analysis and Critical Control Points,HACCP)食品安全控制体系建议,旨在提升预制菜食品生产企业的安全风险控制管理水平、预制菜食品质量水平以及预制菜食品安全控制水平,为广大消费者提供方便、快捷、安全的预制菜食品,为预制菜产业的市场监管及健康发展奠定基础。展开更多
基金National Natural Science Foundations of China(Nos.51007052,71201097)Natural Science Foundation of Shanghai,China(No.14ZR1415300)
文摘With the rapid development of the wind generation,uncertainties of random wind and load bring some inevitable impacts on the security of power system. Once the uncertainty causes line power to exceed its limit, line overload will occur. The paper presents the risk control of transmission line overload for windintegrated power systems. Firstly, a risk control model of line overload is proposed considering the uncertainties of loads,generator outputs and wind powers. The generation cost and security level of system associated with overload can be optimally controlled. Then path following interior point method is employed to carry out the optimal control. Finally the simulation is made on the modified IEEE-30 bus system. Results show that the risk of line overload is effectively reduced through the optimization of control variables.
文摘The safety and risk management of cosmetic products runs through the entire life cycle of the product. The author focuses on the safety of cosmetic products, starting from the three stages of cosmetics research and development, production and sales, pointing out the key control points at each stage, aiming to provide a reference for cosmetics companies to develop products.
文摘随着经济的发展和社会的进步,快节奏的生活方式使得预制菜食品受到越来越多消费者的关注和青睐。近年来,预制菜行业发展迅速,并保持高速增长态势,发展潜力巨大,但也凸显出一些问题。本文对预制菜产业发展现状进行论述,探讨预制菜发展前景,并对消费者普遍关注的预制菜食品标准问题和安全问题进行全面分析。结合预制菜行业发展实际情况,提出逐步建立健全标准体系、在生产过程中实施危害分析和关键控制点(Hazard Analysis and Critical Control Points,HACCP)食品安全控制体系建议,旨在提升预制菜食品生产企业的安全风险控制管理水平、预制菜食品质量水平以及预制菜食品安全控制水平,为广大消费者提供方便、快捷、安全的预制菜食品,为预制菜产业的市场监管及健康发展奠定基础。
