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泰安市售塑料包装奶制品双酚A含量检测及膳食风险评估 被引量:5
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作者 冯天宇 安康 +5 位作者 赵雪桢 张斌磊 侯海峰 杨树林 刘晚晴 孟凡戈 《食品安全质量检测学报》 CAS 2017年第11期4476-4479,共4页
目的调查泰安市售奶制品中双酚A(bisphenol A,BPA)含量,并对泰安市居民进行BPA膳食风险评估。方法从泰安市各大市场随机抽取奶制品(包括牛奶、酸奶及奶饮料等),采用超高效液相色谱-质谱联用法(ultra performance liquid chromatography-... 目的调查泰安市售奶制品中双酚A(bisphenol A,BPA)含量,并对泰安市居民进行BPA膳食风险评估。方法从泰安市各大市场随机抽取奶制品(包括牛奶、酸奶及奶饮料等),采用超高效液相色谱-质谱联用法(ultra performance liquid chromatography-mass spectrometry,UPLC-MS)测定BPA含量,用SPSS 22.0进行统计分析并通过点评估法对泰安市居民BPA膳食风险进行评估。结果泰安市售奶制品中BPA污染十分普遍,但均不超过国家要求范围,其中普通聚乙烯(polyethylene,PE)材料包装奶制品BPA含量高于高密度聚乙烯(high density polyethylene,HDPE)材料包装奶制品(P<0.05),普通人群暴露的BPA来源于乳制品的量为0.007~0.035μg/(kg·bw/d),占暴露量占可耐受每日摄入量(tolerable daily intake,TDI)的0.171%~0.878%。结论泰安市市售的奶制品中BPA的污染比较普遍但污染程度较轻,对泰安市市民的健康尚不构成很大的威胁。 展开更多
关键词 奶制品 双酚A 超高效液相质谱法 风险评估
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Distributed dynamic event-based finite-time dissipative synchronization control for semi-Markov switched fuzzy cyber-physical systems against random packet losses
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作者 伍锡如 张煜翀 +1 位作者 张畑畑 张斌磊 《Chinese Physics B》 SCIE EI CAS CSCD 2023年第10期328-342,共15页
This paper is concerned with the finite-time dissipative synchronization control problem of semi-Markov switched cyber-physical systems in the presence of packet losses, which is constructed by the Takagi–Sugeno fuzz... This paper is concerned with the finite-time dissipative synchronization control problem of semi-Markov switched cyber-physical systems in the presence of packet losses, which is constructed by the Takagi–Sugeno fuzzy model. To save the network communication burden, a distributed dynamic event-triggered mechanism is developed to restrain the information update. Besides, random packet dropouts following the Bernoulli distribution are assumed to occur in sensor to controller channels, where the triggered control input is analyzed via an equivalent method containing a new stochastic variable. By establishing the mode-dependent Lyapunov–Krasovskii functional with augmented terms, the finite-time boundness of the error system limited to strict dissipativity is studied. As a result of the help of an extended reciprocally convex matrix inequality technique, less conservative criteria in terms of linear matrix inequalities are deduced to calculate the desired control gains. Finally, two examples in regard to practical systems are provided to display the effectiveness of the proposed theory. 展开更多
关键词 cyber-physical systems finite-time synchronization distributed dynamic event-triggered mechanism random packet losses
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