The objective of this paper is to obtain metal - ceramic composite materials with better complex properties by the way of preparing nano - composite powders of metal and ceramic . in our thought , firstly we should prepare nano - ceramic powders coated with metal , and then during the period of sintering , the film of metal could prevent the nano ceramics powder from dumpling and keep the powders to be nano - sized 这样，在随后制备块材的烧结过程中，由于复合粉体复合充分，相容性提高，结合力高，另外金属表面层可抑制纳米陶瓷粉体的融合长大，使粉体在烧结后保持纳米尺寸，从而发挥纳米颗粒的作用；同时通过引入均匀分布的韧性金属相，进一步改善陶瓷的脆性。
The major research findings and conclusion of the paper is showed as follows : ( 1 ) based on deeply analyze the calculation method of existing various kinds of pile composite foundation bearing capacity , by means of abstracting and improving , the calculation method of long - short - pile composite foundation has been gained 本文主要研究成果与结论有: ( 1 )在深入分析现有各种桩体复合地基承载力计算方法的基础上,通过提炼与改进得到了长短桩复合地基承载力计算方法。
By combining the information from the cdna sequences with functions of their homologs , we suggest that two kinds of hormones may play important roles during flower regeneration in a few ways : ( i ) proteolytic system of ubiqutin / 26s proteosome complex , ( ii ) actin - dependent vesicular cycling of auxin efflux carrier , ( iii ) regulating transcription of genes , ( iv ) phosphorylation and dephosphorylation 经过进一步的筛选，结合序列特征和同源基因的功能信息对这些基因功能进行了初步分析。认为两种外源激素可能通过泛素26s蛋白酶体复合体对调节蛋白的降解机制，生长素运输载体肌动蛋白依赖的小泡运输，基因转录调节，磷酸化和去磷酸化等调节过程诱导风信子花分生组织的再生。
This program can be used to calculate the settlement of various kinds of soft ground under highway embankment , it can also be used to calculate lateral displacement and pore water pressure . in this thesis , the author used this program to calculate one - dimensional consolidation problem , and the results showed that this program was credible 该程序可用于加筋堤、桩体复合地基和砂井地基等多种路堤软基的沉降计算，同时又可计算路堤软基在各个时刻的侧向变形和孔隙压力值，并能模拟各种施工加载情况。
