The "Unit type" lithogeochemical survey method can decrease the numbers of sampling and the amounts of analytic run, and reduce greatly production costs.
“面型”岩石测量方法可成倍地减少样品采集量和分析工作量，大幅度降低了工作成本。
2
The article researches hit probability of single firepower unit and multiple firepower units making use of analytic result of shooting error.
利用误差分析的结果，还研究了单个火力单位和多个火力单位时的命中概率。
3
The result shows seven-freedom unit finite element method has high precision to analyse simple beam of rectangular section, it can replace complex analytic solution.