排序方式: 共有36条查询结果,搜索用时 46 毫秒
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屠宰猪中大肠杆菌毒力基因检测及耐药性分析 总被引:2,自引:0,他引:2
为了解屠宰猪中大肠杆菌的毒力因子、种群分型以及耐药性情况,分析潜在的食品安全问题,为食品安全和临床用药提供理论依据,对来自屠宰猪中77?株大肠杆菌,包括陕西53?株、重庆16?株及河南8?株,进行毒力基因、种群分型及耐药性的检测。结果显示,iutA基因的检出率最高,优势群系为A群系;且菌株的耐药情况严重,12?种常见抗生素中对四环素、甲氧苄啶/磺胺甲二唑的耐药性普遍高。大多数菌株耐3~9?种药(90.91%),最高可对11?种抗生素耐药。屠宰猪中存在耐药性菌株的污染,且极有可能是通过猪肉生产过程进入到食物链中,对消费者的健康存在一定的潜在危害,需要加强卫生监督。 相似文献
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<正>在汽轮机转子穿过外缸的部位,必须采取措施用以防止外部空气漏入汽缸,从而影响排汽缸的真空,同时也必须防止汽缸内蒸汽漏出汽缸,漏入前轴承箱容易造成油中带水,漏至汽机房破坏汽机房环境。带有迷宫形密封环的汽封和汽封蒸汽系统就是为了完成这一功能而设置的。CC100/N70-12.2/1.7/0.7型汽轮机汽封系统见图1。它是 相似文献
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Dan Hao 《计算机科学技术学报》2009,24(5):962-974
Debugging is a time-consuming task in software development. Although various automated approaches have been proposed, they
are not effective enough. On the other hand, in manual debugging, developers have difficulty in choosing breakpoints. To address
these problems and help developers locate faults effectively, we propose an interactive fault-localization framework, combining
the benefits of automated approaches and manual debugging. Before the fault is found, this framework continuously recommends
checking points based on statements' suspicions, which are calculated according to the execution information of test cases
and the feedback information from the developer at earlier checking points. Then we propose a naive approach, which is an
initial implementation of this framework. However, with this naive approach or manual debugging, developers' wrong estimation
of whether the faulty statement is executed before the checking point (breakpoint) may make the debugging process fail. So
we propose another robust approach based on this framework, handling cases where developers make mistakes during the fault-localization
process. We performed two experimental studies and the results show that the two interactive approaches are quite effective
compared with existing fault-localization approaches. Moreover, the robust approach can help developers find faults when they
make wrong estimation at some checking points. 相似文献
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在两科技园的规划设计中,通过学习和总结国际上先进园区的建设经验,立足可持续发展的原则,探求了如何将自然、文化、人、科技等观念与建设21世纪新型科技园区相结合。 相似文献
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