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In particular, when thereis an alternating group A_5 action on a Spin 4-manifold X, we obtain: If X is smooth Spin4-manifold with non-positive signature and b_1=0, denote k=-σ/16 and m=b_2~+,then 2k+3≤m if b_2~++b_2~+≠2b_2~+(Z/A_5) and b_2~+≠0,where and are subgroups of A_5 generated by the elements s=∈A_5and t=∈A_5 respectively.

特别地，在Spin 4-流形具有非交换群A_5作用时，我们得到了：若X为光滑的具有非正符号差的Spin 4-流形，b_1=0，令k=-σ／16，m=b_2~+，如果X上具有Spin交错群A_5作用，且满足b_2~++b_2~+≠2b_2~+(X／A_5)，b_2~+≠0，则2k+3≤m，其中和分别为s=∈A_5和t=∈A_5生成的A_5的子群。

XRD shows: when the value of x is between 0.1 and 0.3, the alloying thin film remains the structure of hexagonal wurtzite and the angle of (002) diffraction peak becomes bigger as the value of X increases; The photoluminescence spectra at room temperature shows that the PL spectra of the alloying thin film is composed of the stronger UV emission band and weaker visible band, and UV emission peak will have the blue shift with the content of Mg increasing and the visible emission weakened.

XRD衍射测试表明：在0.1＜x＜0.3范围内，合金薄膜仍然保持氧化锌六角型纤锌矿结构，(002)衍射峰位随x的增大向大角度方向移动，在X≥0.3的范围内，合金薄膜的结构则为氧化锌和氧化镁的混合结构；室温光致发光谱表明：ZnMgO合金薄膜PL谱都是由较强的紫外发射带组成，且随着Mg含量的增加紫外发射峰位发生蓝移，同时可见发射增强。

Methods: The sign object was put at each acromial end and clavicle end of normal acromioclavicular joint. And then acromioclavicular joint was tested the locations in abducetion+superduct 、 endoduction 、 anteflexion 、 post-extention 、 external and interior rotation by using 3D- laser scanning camera .Computer calculate the rotation of the two sign objects in x 、 y 、 z axis(x delegate clavicle axis,y delegate coronal section ,z delegate sagittal axis).

通过在正常活体肩锁关节的锁骨端及肩峰端分别安装一个激光照相扫描仪的探测端子，3D-激光扫描相机扫描肩关节在做前屈+上举，后伸，外展，内收，外旋及内旋等不同位置下两端子的位置，通过计算机计算出两端子在X、Y、Z轴（X轴代表锁骨的长轴，Y轴为冠状面与X轴垂直轴，Z轴为矢状轴）上的旋转情况。

Especially the colossal magnetoresistance manganates La1-xCaxMnO3 , one of interesting materials in our lab, exhibited strongly CAPO at various doping concentrations (x=0, x=0.3 and x=0.58). However, several mechanisms about the generation and detection of CAPO have been proposed and disputed each other.

特别是在本实验室感兴趣的La1-xCaxMnO3庞磁阻材料，在几个掺钙含量x=0、x=0.3、x=0.58，也都呈现明显的同调声子振荡，虽然形成同调声子振荡的机制有几种不同的理论模型，但互相仍有所争议。

When the thickness of ITO was 210 nm, the Alq3 based TOLED exhibited a narrowed Electroluminescent peak at 536 nm with a full width at half maximum of 22 nm, of (0.229, 0.729) and an efficiency of 1.77cd/A. 2. With Alq:DCJTB/TBADN:TBPe/Alq:C545 as white light-emitting layer, RBG tricolor TOLEDS were achieved by adjusting the thickness of ITO. We obtained the peak wavelengths at 603nm, 475nm and 538nm, CIE coordinates of (x=0.513, y=0.360),(x=0.133, y=0.201) and (x=0.335, y=0.567), FWHMs of70nm, 30nm and 48nm for red, blue and green, respectively.

以多层结构Alq：DCJTB/TBADN：TBPe/Alq：C545为白光发光层，通过调节ITO的厚度，实现了红、蓝、绿三基色发光的顶发射微腔器件；当ITO的厚度分别为240nm、180nm、215nm时，器件发光峰值为603nm、475nm、538nm时，色坐标为(X=0.513，y=0.360)、(x=0.133，y=0.201)和(x=0.335，y=0.567)，半高宽为70nm、30nm、48nm。

The aim of this thesis is to explore new MWDC with cation-deficient perovskite structure in A_5B_4O_(15) system. According to the characteristic of A_5B_4O_(15) perovskite structure, series of new titanates / tantalates Ba_(5-x)La_xTi_xTa_(4-x)O_(15)(x=1~3) were prepared, characterized. The dielectric properties were measured. Furthermore, the effects of Nb~(5+) substitution Ta~(5+) at B-site in Ba_3La_2Ti_2Ta_2O_(15) ceramic on structure and dielectric properties were studied.

本论文的主要目的是在A_5B_4O_(15)系列中探索新型类钙钛矿结构高性能微波介质陶瓷，进行了Ba_(5-x)La_xTi_xTa_(4-x)O_(15)(x=1～3)系列钛钽酸盐陶瓷的制备、结构与介电性能研究工作，并研究了材料Ba_3La_2Ti_2Ta_2O_(15)的B位Nb~(5+)离子取代Ta~(5+)离子对材料结构和介电性能的影响。

Then by using FEM to calculate the direct and quadrature axis magnetic fields, the steady-state reactances x〓 and x〓 are determined with definition method and vector potential method when μ〓 equals ∞ and voltage equals 0.1U〓 and U〓 respectively.

接下来，以有限元为工具，在直轴和交轴磁场下，用定义法和矢量位法，分别确定μ〓=∞、0.1U〓和U〓状态下的稳态电抗x〓和x〓以及在额定负载下确定x〓和x〓的饱和值，并研究了直、交轴间的耦合电抗以及用路的方法确定稳态电抗。

As x was increased, the transition of B-site cation ordered perovskites from 1:2 (x = 0) to 1:1 (x = 0.1) and disordered (x = 0.5) types was observed and related to the variation in the proportion of cation-oxygen octahedra.

此有序结构相转换与各阳离子之氧八面体之比率的变化有关。1：2 有序程度主导 x = 0 ~ 0.10 之 Qxf 值随著 x 的增加而降低的趋势。

It was found that CaZr4 (PO4)6(X＝0) and BaZr4(PO4)6 (X= 1) had opposite anisotropies in their respective axial thermal expansion,therefore,the near-zero thermal expansion can be obtained by selecting X value.

研究发现CaZr(PO4)6(X=0)及BaZr4(PO4)6(X＝1)时的轴膨胀特性正好相反，因此当X为某一值时热膨胀系数将为零。

But this is not new - the X-11 and X-12 from the 1950s were going to be prototypes of the Atlas intercontinental ballistic missile, and the still-born Lockheed X-27 was always intended as a prototype of a production aircraft.

不过，这并不是新的-在X - 11和X - 12由20世纪50年代将被原型的Atlas洲际弹道导弹，并仍在出生洛克希德的X 27总是作为原型，生产的飞机。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。