Statistical sampling inspection method of weight and estimate of mean for import and export commodity in uniform packing 进出口定重包装商品重量的抽样检查和均值估计方法
, single sampling inspection plans having desired operating characteristics by variables standard deviation unknown and single limit specified 通过变量进行有预期操作特性的一次抽样检查计划
Abstract : there are many mistakes in the application of the normal one sampling inspection form for many companies during ccc certification . some measures were presented to correct these mistakes 摘要: 3c认证中,企业应用正常一次抽样检查表存在不少错误,针对理解和执行中的错误提出了纠正措施,以规范和统一。
It is considered eligible if all the cargoes are in accord with the certificates and reports plus all the sample inspection items are passed ; whereas it is considered not eligible if anything unqualified 货物与证书、报告等资料相符且全部抽样检验项目均合格,则判定该批为合格;货物与证书、报告等资料不符或抽样检验项目中有任何不合格,则判定该批为不合格。
The food and environment hygiene department ( fehd ) conducts routine sampling inspections of the food available for sale in hong kong . there is no separate figure showing the percentage of food items sampled which are not imported through local dealers 食物环境?生署(食环署)定期抽取在本港出售的食物样本,当中并没有个别数字显示所谓水货食品的比例。
Compared with the hypothesis tests and sampling inspections for normal distribution , the confidence tests can overcome the disadvantage that to accept a null hypothesis may simply mean that it is not rejected by significance hypothesis tests , and greatly improve the test precision 置信检验克服了显著性假设检验在接受原假设时缺乏说服力的弱点,能够以高概率判断正态母体特征值是否满足工程中规定的条件。
The research educes status of the water quality about current second water supply system in jinan by overall investigation of protection about second water supply system in jinan and sampling inspection of water , the protection of second water supply system in jinan is not optimism 本项研究通过对济南市的二次供水系统水质防护情况作一次全面的调查,对水样做抽样检测,得出济南市现有的二次供水系统水质状况,济南市二次供水系统水质防护现状不容乐观。
In this thesis , the critical components of pcs are analyzed and tested in detail . i present the scheme of reliability qualification test of capacitors , furthermore , analyze the sampling inspection scheme theoretically for capacitors and put forward the proposals to improve this scheme . for most of components in pcs with high reliability or long lifecycle , which need great investment of time and material for their reliability tests , this paper provides a new and effective statistical method for this kind of components - the progressive stress accelerated life testing with exponential distribution 可靠性试验也是可靠性工程的重要组成部分,能源系统许多元器件为高可靠性、长寿命器件,且大部分是非标准器件,为保证整个系统的可靠性,必须对备选元器件进行可靠性试验,本文对能源系统关键器件进行了详细的试验分析,给出了电容器的鉴定试验方案,对其抽样试验方案进行了理论分析并给出了方案改进建议。