投入产出技术在计划平衡中的理论与应用

在用投入产出技术作计划平衡时，目前一般采用最终产品法、总产品法及国民收入法等．本文从理论上研究了这些方法的可行性问题，并在此基础上提出一个较理想的综合法．最后附有实例并说明综合法的现实意义．     

X射线荧光光谱法测定朵儿合金中银、金、铜、硒、碲、铅、锡和铋的含量

朵儿合金是卡尔多炉处理铜阳极泥生产工艺中熔、吹炼的最终产品,是后期银电解生产阴极银的重要原料[1]。炉前生产中为了及时判断吹炼进行的程度是否能达到浇铸合金板的指标要求,需要快速分析朵儿合金中银、金、铜等各元素的含量。目前朵儿合金的化学分析没有直接的标准检测方法,部分元素可以参考贵金属合金和纯银中主量及杂质元素的化学分析方法[2-5]。这些方法涉及络     

Theoretical Study on the Reaction of PCl_3/H_2 on Silicon Substrate Surface

The reaction mechanism of PCl3/H2 on silicon substrate surface （simulated by Si4 cluster） was investigated with Density Functional Theory （DFT） at the B3LYP/6-311G^＊＊ level. On silicon substrate, PCl3 firstly undergoes dissociative adsorption, and then the adsorption product reacts with H2 via a four-step multi-channel mode to give the final product PSi4 cluster. The geometries at each stationary point were fully optimized. The possible transition states were determined by vibrational mode analysis and IRC verification. And finally, the main reaction channel was given.