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本文对电子电气产品中铅、镉、铬测量的不确定度进行了评定。用火焰原子吸收光谱法测定电子电气产品中铅、镉、铬含量,通过对影响样品测量结果的不确定度分量的分析和量化,计算出被测量(铅、镉、铬含量)的标准不确定度和扩展不确定度,从而给出各分量对总测量不确定度的相对贡献,并对测量结果进行了表述。 相似文献
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Arman Avadikyan Author Vitae Patrick Llerena Author Vitae 《Technological Forecasting and Social Change》2010,77(4):649-661
Long term increases of petrol prices and the threat of a global climate change have created in the automotive industry a new competitive environment based on the development of more sustainable technologies. Using the real option reasoning lens we provide a theoretical framework to better account for the technological and market uncertainties and irreversibilities that impact the investment and innovation decisions of automotive firms supporting the development of more sustainable vehicle technologies. We investigate the case of hybrid vehicles in a transitional perspective by insisting on their potential to influence the dynamic shaping of investment decisions of firms in the car industry. We consider the hybridization strategy as intra-project and inter-project compound growth options to manage the flexibilities and irreversibilities of investment decisions during the transition process. We provide four different-sometimes conflicting-strategic rationales structuring the investment efforts of firms in hybrid vehicles and illustrate them with numerous examples from the automotive industry. 相似文献
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稻谷重金属镉含量的测定是粮食企业入库检验的必检项目,通过用快检方法与国家标准方法进行比对试验,找出影响快检方法检测结果的因素,从而提高快检方法检测结果的准确性和检测效率。 相似文献
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