目的对依据HACCP原理建立的有害生物防控体系实施效果进行评价。方法根据HACCP(Hazard Analysis Critical Control Point)原理建立食品生产企业HACCP有害生物防治计划,组织实施近5年,应用鼠密度、侵害率、密度下降率等指标评价防治效果...目的对依据HACCP原理建立的有害生物防控体系实施效果进行评价。方法根据HACCP(Hazard Analysis Critical Control Point)原理建立食品生产企业HACCP有害生物防治计划,组织实施近5年,应用鼠密度、侵害率、密度下降率等指标评价防治效果。结果鼠类、爬虫类和飞虫类有害生物侵害率分别下降了61.3%、64.1%和67.1%,均存在显著差异(P<0.01),防治效果显著。结论虫控企业依据HACCP原理制实施有害生物防治计划效果显著,是食品生产企业保障食品安全的重要依据。展开更多
A closed orientable Haken 3-manifold containing a non separating incompressible closed surface has two canonical Heegaard splittings, which are called self-amalgamation and bilateral self-amalgamation.Heegaard distanc...A closed orientable Haken 3-manifold containing a non separating incompressible closed surface has two canonical Heegaard splittings, which are called self-amalgamation and bilateral self-amalgamation.Heegaard distance introduced by Hempel is a useful index in studying Heegaard splitting. This paper studies the stabilization problem for the bilateral self-amalgamation, and proves that if the distance of bilateral selfamalgamation of a Heegaard splitting is at least 9, then it is unstabilized, weakly reducible and irreducible.展开更多
文摘目的对依据HACCP原理建立的有害生物防控体系实施效果进行评价。方法根据HACCP(Hazard Analysis Critical Control Point)原理建立食品生产企业HACCP有害生物防治计划,组织实施近5年,应用鼠密度、侵害率、密度下降率等指标评价防治效果。结果鼠类、爬虫类和飞虫类有害生物侵害率分别下降了61.3%、64.1%和67.1%,均存在显著差异(P<0.01),防治效果显著。结论虫控企业依据HACCP原理制实施有害生物防治计划效果显著,是食品生产企业保障食品安全的重要依据。
基金supported by National Natural Science Foundation of China(Grant Nos.11271058 and 11371076)the Fundamental Research Funds for the Central Universities(Grant No.DUT14ZD208)
文摘A closed orientable Haken 3-manifold containing a non separating incompressible closed surface has two canonical Heegaard splittings, which are called self-amalgamation and bilateral self-amalgamation.Heegaard distance introduced by Hempel is a useful index in studying Heegaard splitting. This paper studies the stabilization problem for the bilateral self-amalgamation, and proves that if the distance of bilateral selfamalgamation of a Heegaard splitting is at least 9, then it is unstabilized, weakly reducible and irreducible.
