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原子吸收光谱法测定儿童金属产品中总铅含量的不确定度评定 被引量:1
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作者 何建仁 梁剑 +1 位作者 黄海雨 陈丽花 《当代化工研究》 2017年第2期140-142,共3页
根据《测量不确定度评定与表示(JJF1059-1999)》中的规定评定了原子吸收光谱法测定儿童金属产品中总铅含量的不确定度。找出了测试过程中不确定度的来源并逐一分析,最后计算得到合成不确定度为15.0mg/kg ,扩展不确定度为30.0mg/kg。
关键词 儿童金属产品 原子吸收光谱法 总铅 不确定度
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New type steam turbine for cogeneration
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作者 he jianren Yang Qiguo Xu Damao 《Engineering Sciences》 EI 2010年第3期81-84,共4页
A concept of energy saving & efficiency improving from cold source for cogeneration steam turbine was discussed herein. A new type "NCB" cogeneration steam turbine was proposed,which could considerably i... A concept of energy saving & efficiency improving from cold source for cogeneration steam turbine was discussed herein. A new type "NCB" cogeneration steam turbine was proposed,which could considerably increase heat supply capacity,thermal efficiency and electric power. Taking 300 MW cogeneration steam turbine as an example,the results show that heat supply capacity reaches the maximum,i.e. increases by 30 %,thermal efficiency is improved by 12 %,and electric power is enhanced by 15 MW during peak heat load. 展开更多
关键词 cold source new type cogeneration steam turbine energy saving emission reducing economic effect
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