体轴形成

The formation mechanism of the screw structures on the surfaces of polytype crystals is discussed according to the theoretical model of anionic coordination polyhedron growth units.

本文用负离子配位多面体生长基元理论模型讨论了多型性晶体表面螺旋结构的形成，提出在多型性晶体中配位多面体呈层状分布，配位多面体的面为层的边界，上、下层负离子配位多面体不是呈镜象对称的，在三方晶系和六方晶系的晶体中是沿晶轴a、b错开，上、下两层负离子配位多面体体呈交叉对应，从而达到稳定平衡。

Based on research of lube leakage of the vertical turbine principal axis,the leakage reason is analyzed.

针对立式水轮发电机轴承的漏油问题，分析了产生漏油的原因；结合理论计算，在挡油筒体上加环形板，使之与轴领内壁形成圆盘摩擦泵。

If θ=0?＃, it means that whisker axis is perpendicular to crack face, the energy dissipation caused by whisker-bridge join in zone of crack end achieves its maximum and the reintoughening effect of material achieves the best of all; along with growth of angle θ, the maximum principal stress in the matrix of whisker roots increases, when it achieves its limit, the whisker will be broken and orientation effect will be weakened.

当添加晶须与裂纹面法向形成角度θ时，随角度θ的增加，裂纹尖端拉应力增加。当添加角度较大时，晶须根部基体承受了较大的应力，易遭到破坏性崩裂。同时，晶须内部主应力与晶须轴向之间的角度也随角度θ的增加而增加，造成晶须折断，致使造成晶须拨出的体积分数φap减小，降低了增韧效果。

L-1 6-BA ; the separated shoots or the stemsegments with one leaf and one axillary bud can form the complete plantlets withwell-developed rootage on the MS medium supplemented with 0.5 mg.

约有26.7%的下胚轴外植体在附加5.0 mg/L 6-BA的MS培养基上可形成丛芽；3。

How to calculate the intersection point between line and CSV is a core problem in NC machining process simulation techniques. This paper presents a noval intersection algrithm by decomposing the CSV into several simple surfaces and the intersection point is found by solving the scalar equation.

论文中针对数控加工几何仿真中存在的几个难点问题，提出了以下的处理方法： 1利用包络理论计算多轴加工中刀具运动所形成的刀具扫描体，算法精确，简单，计算量小，运算速度快。

The results showed that there existed variation among eucalypt families in wood physical-mechanical properties and wood chemistry. There were significant differences among E.pellita families、E.grandis families and E.urophylla譋.grandis clones in wood colors as well as between Strains and within trees.The variation of the surface wetability of wood between E.grandis families and E.urophylla譋.grandis clones were significant.Even in the same families level or clones level,there still existed the same regulation. The degree of collapse of eucalypt had a large relation in the amount of tylosis in vessel and vestured pits on the cell wall of vessel. The more rich tylosis and vestured pits in vessels,the more probability to occur collapse for eucalypt.The biggest moment collapse was probably the critical point of the drying degrade.During the fomulation of drying technology,it is necessary to adopt moderate condition to make the vessels which had formed the biggest moment collapse at the biggest moment collapse resume,especially to prevent the permanent set.At the normal temperature level,the main factors which influenced residual collapse were the contents of ray parenchyma and axial parenchyma .Nearly all the cells joined the course of forming the moment collapse and biggest moment collapse.Interval drying was fit for eucalypt plantation which was easier to make collapse.

研究表明：桉树不同家系间木材物理力学性质和化学组成存在差异；粗皮桉家系间、巨桉家系间、尾巨桉无性系间材色存在显著差异，株间、株内木材材色存在变异；桉树木材表面润湿性在巨桉家系间、尾巨桉无性系间存在着显著差异，在同一家系或同一无性系中，株间和株内也存在着相同的变化规律；桉材皱缩程度与其导管中侵填体的多少和导管壁上纹孔具有的附物多少密切相关，侵填体含物越丰富，纹孔附物越多，桉材越容易皱缩；最大瞬间皱缩是能产生更大干燥降等的临界点，在制定干燥工艺时，必须在最大瞬间皱缩发生时，采用温和条件，使已产生最大瞬间皱缩的细胞尽可能多的恢复，尤其不能使其产生永久变定；在常温条件下，影响残余皱缩的主要因子是射线薄壁细胞和轴向薄壁细胞含量；而对于瞬间皱缩和最大瞬间皱缩，几乎所有细胞都参与它们的形成过程；对于易皱缩的桉树木材，间歇干燥是最有前途的干燥方法。

The melting zone in explosive consolidating HSS sample has heen investigated by TEM and SEM, and founds the solidifying structure of the liquid phase is consisted by δ-ferrite and carbide that are uniformity and disper. It shows the solidifying rate of the liquid phase is very rapid. and is higher than the cooling rate of the casting and atomization of nitrogen.

对高速钢爆炸固结样品中熔化区用扫描电镜、透射电镜研究发现：爆炸固结过程中形成液相的凝固组织为极其细小均匀的等轴δ-铁素体晶粒和碳化物，表明液相的凝固速度非常快，远远大于铸锭凝固的冷却速度和氮气雾化制粉的冷却速度。

Two qina ligands chelate a cobalt ion by 0 and N atoms and two DMSO ligands coordinate a cobalt ion by two O atoms at an axis. The complex formed inerratic octahedron configuration, and π-π stacking weak interaction was observed between the molecules.

配合物为单斜晶系，P2(1)/C空间群，2个qina配体以氮原子和氧原子与Co离子螯合配位，2个DMSO以氧原子与Co离子轴向配位，形成规则的八面体构型配合物，分子之间存在π-π堆积弱相互作用。

There are also two types of IPTligands in crystal 2. With two bidentate carboxylates, one acts as bridging ligandconnecting neighboring 〓 tetrahedral core along c axia to form ladderlike long chain.

且间苯二甲酸根配体可以分为两类：第一类配体中每个羧酸根连接四核锌四面体结构中的四条边并沿c轴方向连接邻近的四面体结构单元形成梯形长链。

The rock composition, material disperse, structure characteristic, boundary condi tion, movement mode and forming mechanism of plane rotation slope are completely differ nt from the slope deformation and destroy people usually thought, which moves frorn top to bottom, callapsing or ratating vertical around horizontal axis under the outside load tak ing gravitational force as primaty factor.

平面旋转坡体的岩性组成、物质分布、结构特征、边界条件、运动方式及形成机理等与过去人们习惯上认识的那种在以重力为主的外荷作用下，自上而下同步位移、崩落或绕水平轴的立面旋转坡体的破坏类型完全不同。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。