The Experimental Results of Pb and Zn Partitioning between Fluid and Melt, and Their Application to the Research on Metallogeny

Three logarithmic linear equations between D_(Me)^(V/L) and [m_(NaCl)], and the relationship of D_(Me)^(V/L) versus F/Cl or K/Na mole ratios have been established by the experiments of the partitioning of Pb and Zn between granitic silicate melt and aqueous fluid. These results have been used to quantitatively study some essential problems, such as the possibility and degree of Pb-Zn mineralization in the system of granitic magma and hydrothermal fluid, and the influence of the relative contents of alkali and volatiles on the Pb-Zn mineralization in the same system. Some new points have been put forward in this paper.

一种基于多级聚类的VLSI电路划分算法

超大规模集成电路(VLSI)划分问题,属于NP-难问题。结合了贪心随机自适应搜索过程(GRASP)和多级聚类方法的思想,提出了一种基于多级聚类的电路划分算法。算法采用贪心随机自适应的思想改进了多级划分方法中重边粗化聚类(HEM)方法。通过对ISPD98的18个标准测试样例的测试结果表明,该方法与著名的划分工具h Metis相比,划分质量有一定的提高,最多可以改进3%左右。