At first , the character of millimeter wave and frequency multipliers in millimeter wave band is introduced . based on the principle of harmonic frequency extraction in nonlinear device , we present the avalanche diode high order frequency multipliers in w band 利用雪崩效应中强烈的非线性电感特性,基于非线性器件谐波提取的思想,对倍频器电路进行了优化仿真,采用雪崩倍频二极管研制了w波段雪崩高次倍频器。
Construction and expression of yeast engineering yaccine : s14 / gnsag " as transformed to yeast host straln x33 by means of electroporation after ppiczaa s , . aresag " as l ined by saci enzyme . the single fungus , as choose and dibble inocu1ating in we and am plate , the positive fungus was gro ' ing in rm but not in w , and was 6 inoculated in ypd which included zeocine 500ug / ml and 1000ug / ml . 5 transformers were ampl if ied by pcr , three is same with positive control 选取单个菌落分别点种到删平板和md平板，找出在回d上生长正常， w上生长缓慢或不生长的菌落，即阳性菌落，再以阳性菌落分别涂布zeocine含量500ug加， 1000ug砌l的ypd平板，以高浓度的抗生素筛选高拷贝的酵母工程菌，在含500ug ml高浓度抗生素平板上获得了15个转化子，取其中5个进行pcr扩增，有3个扩增产物与阳性对照相同，说明此酵母细胞中已含有s hbsag融合片段，其中之一命名为p
The fractorgraphy analysis show that in the layer rich in w and mo , the feature of fracture is brittle fracture which follow the bordline of crystal . in sections rich in the felt metal , the feature of fracture is ductile fracture . in w - mo layer , the feature of fracture are brittle fracture and some ductile fracture 断口形貌特征研究表明，富w区、富mo区主要为沿粒界脆性断裂；粘结金属发生韧性断裂； w - mo混合区为颗粒的沿粒界脆性断裂和粘结相的韧性断裂的混合型断裂；富ti区为典型的穿晶解理断裂； mo - ti混合区以穿晶解理断裂为主，颗粒边界表现出准解理断裂特征。
Cr particles were enclosed by cr - w solid solution alloy after cr powder and w powder were sintered if the grain size of cr powder is larger than w powder . around cr particles more cr - w solute was formed with prolonging sintering time . during infiltration process , cr was dissolved and moved into the pores in w skeleton by cu liquids and made w skeleton become w - cr skeleton 粒度较大的cr粉和粒度较小的w粉混合烧结后，形成crw固溶体合金包围cr块的组织形貌，烧结时间越长， cr块周围形成的crw固溶体越多；熔渗过程中， cr被cu液溶解并转移到w骨架之间的孔隙中， w骨架则转变为cr - w骨架。
Different element in some interface change in evidence , but different element in other interface change gradually . the interface often have some hole and a mass of one element . in w - mo fgm , because the different rime temperature , the size of mo grain differ from the size of w . in w - mo - ti fgm , mo - ti layer rich in ti , there are more polygonal a 显微组织特征研究表明， w - mo系和w - mo - ti系梯度功能材料整体致密，有的宏观层间界面明显，在界面处成分发生突变，而且还有气孔、颗粒偏聚等缺陷，有的宏观层间界面处成分变化平缓； w - mo系梯度功能材料由于w 、 mo的再结晶温度不同，梯度层颗粒粒径有显著差异； w - mo - ti系梯度功能材料中，以ti为主的mo - ti混合区，主要以多角形固溶体存在，富ti区主要以多角形相存在。
However , when it was too high or too low , its influence became much weak . we analyzed also the relationship between temperature and the elements such as planting ratio , streets direction , and l / h . the result showed that : the temperature in w ~ e oriented streets was always higher than that in n - s oriented streets , with an average : 0 对绿化率、街道走向、街宽与周边建筑高度比l h等因子进行正交分析的结果表明：株洲市夏日白天东西走向街区的温度总比南北走向街区的温度高，平均高0 . 6 ? 0 . 7 ； l h越小，两者差值越大，最高时达1 . 4 ? 1 . 8 。
