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设备比对作为一种有效的质量监控方法,在汽车检测行业得到了广泛应用.众所周知,影响整车排放检测结果的因素较多,试验结果的偏差较大;但因排放检测设备价值昂贵,具备两套及以上排放检测设备的实验室较少,因此,在进行质量监控时,受检测设备数量的限制,难以选择设备比对的方式.本文以5家实验室比对的数据为例,选择其中的极端数据模拟进行两套设备间的设备比对,得出了假设检验用于设备比对的分析方法,并给出了试验数据的置信区间.与实验室间比对结果相比,使用该方法进行两套设备间的比对,比对结果可信. 相似文献
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2012年3月23日,乐巴铁路正式投入客运运营,成都至巴中站问开行旅客列车.巴中至成都全程用时8个半小时此次开行的旅客列车从始于巴中,经乐巴铁路与广元至乐坝铁路相连到达宅成铁路的广元火车站,再达到成都,这标志着结束了革命老区巴中不通旅客列车的历史,使巴中老百姓盼望乘坐火车的梦想成为了现实。 相似文献
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The animal experiment of viscose carbon fiber based C/C composites applied in bone defection intramedullary fixation was carried out in New Zealand white rabbits. The histological observation on the 100th day after surgical operation indicated that the experimental animals recovered well and the bone defect area was reconstructed by new bone trabecula. Immunohistochemical observation of leukocyte common antigen and macrophage suggested that intramedullary fixation materials did not induct any chronic toxicity reactions such as inflammatory reactions, macrophage reactions and formation of granulation tissue. The tissue compatibility of this material was excellent. Meanwhile, the impurity element species and the biological toxic element content of viscose fiber based C/C composites were determined by atomic fluorescence analyzer and inductively coupled plasma atomic emission spectrometry. The results reveal that there are few biological toxic elements in the viscose fiber based C/C composites and it can satisfy the constituent demands of surgical implants. 相似文献
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现浇箱梁具有整体性好、外形美观、刚度大的特点,可做成各种复杂形状,已被广泛地应用于高速公路和城市道路高架桥中。结合桥梁建设实例,介绍满布支架法逐跨现浇箱梁的施工方法及养护。 相似文献
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The research on microfluidic droplet size prediction has been extensive and fruitful, while the droplet deforming process has been seldom studied. In this paper, a frying-oil-assessing microfluidic device was designed to study the droplet deforming and recovering processes, which were dominated by channel geometry, flow rates, sheath flow viscosity and interfacial tension of the two phases. Theoretical expressions of the deforming process and its extreme value were obtained for the first time, supported by simulation and experiments. Theoretical, simulation and experimental results indicated that the steady-state droplet length could be a useful parameter for frying oil assessment. 相似文献
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一美国在强调档案信息的自由流通和市场机制的同时,显示出强调国家档案信息政策的势头和动向,从其档案信息的生产、传播、政府资助、知识产权保护、公共利益保护、竞争与垄断及信息的国际化等方面以求达到国家对档案信息的统一、有效的管理。美国档案信息资源管理是随着国家政府职能的诞生而出现的。1975年美国国会宣布成立联邦文书委员会,并认为信息不应是一种“免费物品”,而是一种“资产”。1980年美国国会制定并通过了《文书削减法》,首次提出,档案信息资源管理政策,作为联邦政府推行档案信息资源管理的一个重要手段,是档案信息资源管理中不可分割的组成部分。据统计,从第95 相似文献
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