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利用最优同变估计的自适应有限元数字水印优化算法
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作者 田维 《安徽电子信息职业技术学院学报》 2017年第5期4-7,共4页
自适应有限元数字水印属于多层的非线性的水印方法,对于复杂函数逼近问题是具有较好的应用性的,但对涵层相关参数十分敏感。针对上述问题,将最优同变估计的思想引入数字水印,提出了一种利用最优同变估计的数字水印优化算法。该算法利用... 自适应有限元数字水印属于多层的非线性的水印方法,对于复杂函数逼近问题是具有较好的应用性的,但对涵层相关参数十分敏感。针对上述问题,将最优同变估计的思想引入数字水印,提出了一种利用最优同变估计的数字水印优化算法。该算法利用最优同变估计及进化策略实现全局搜索及优化的特点,并对自适应有限元数字水印结构及相关参数进行了优化。理论分析及实验结果都证明了该算法的有效性。 展开更多
关键词 信息隐藏 最优同变估计 自适应有限元数字水印 拉脱维亚机
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Implementation of Food Safety Legislation in Catering Establishments in Latvia
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《Journal of Food Science and Engineering》 2011年第5期331-338,共8页
The aim of the research was to evaluate overall quality of introduction of hazard analysis and critical control points (HACCP) prerequisites and HACCP procedures in catering sector in Latvia to reveal common problem... The aim of the research was to evaluate overall quality of introduction of hazard analysis and critical control points (HACCP) prerequisites and HACCP procedures in catering sector in Latvia to reveal common problems that can provoke food-borne infection outbreaks. Certain quantitative indicators were defined and analyzed to conclude about characteristic trends related to implementation of food safety legislation. The state's monitoring data on surveillance of catering establishments were used. Fulfillment of legislative requirements in about 6,000 catering establishments was evaluated during time period of 2004-2009. The results of investigation were obtained with help of statistical analyses using MS Excel computer program. The results of the research suggest that most of catering establishments (e.g., 83.6% during 2009) meet the hygiene requirements only partly. Non-conformities regarding HACCP-based self-control procedures were fixed during 49.2% of inspections. The research reveals characteristic shortcomings that are established from year to year, e.g., improper hygiene of premises (established during 30%-40% of inspections, depending on the year), poor hygiene of technological equipment (established during 27%-37% of inspections), poor personnel hygiene (established during 11%-22% of inspections), inadequate competence of food service personnel (established during 10%-35% of inspections), as well as non-observance of cleaning-disinfection procedures and technological parameters for food processing (established during 11%-25% of inspections, depending on the year). Actual shortcomings can lead to both the direct and the indirect cross-contamination of food. On the base of the research, it was concluded that further detailed assessment of potential food safety risks is relevant to establish risk-based monitoring activities in catering sector. 展开更多
关键词 Food safety legislation catering establishments good hygiene practice (GHP) hazard analysis and critical control points(FIACCP).
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