查询词典 crystal system

By using the group-chain, the wavefunctions of the 4f〓 configuration for RE ions are also expressed as linear combinations of group-chain basis functions in Butler's irreducible representation notation. The matrix elements of the CF Hamiltonian then are calculated by means of the Wigner-Eckart theorem and factorization lemma of the jm factors. Before the CF level fitting, a point-charge calculation of the conventional CF parameters B〓 has been performed by means of the lattice-sum technique from the known crystal structure data. The corresponding parameters in the group-chain are calculated by the conversion relationship between two schemes that proved identical in essence, which are usually used as initial values in the fit to the experimental levels. The ratios of the same k-value CF parameters are suggested as the constraint conditions in the fit, in order to utilize fully the symmetry distortion degree of the studied system.

利用群链理论，属稀土离子4f〓组态的波函数表示为以不可约表示标记的群链基波函数的线性组合；借助Wigner-Eckart定理和2jm和3jm因子的分解定律计算了晶场哈密顿的矩阵元；根据点电荷模型和已知晶体结构数据，利用点阵求和技术计算得到传统晶场参数B〓初值，相应的非传统形式的群链参数初值则由两种方案下的转换关系求得；这些初值通常作为非线性拟合晶场能级计算的初值，系统的对称性畸变信息则反映在以同阶晶场参数的比值作为能级拟合的约束条件。

The results show that Tc and diamagnetic susceptivity decrease, crystal structure changes from being orthorhorhombic to a tetragonal system with increasing Fe and Co content.

先将一定的化学组份在一定程度上混和，再热处理得到的一般为颗粒超导体；而在热的（100）SrTiO〓衬底上边溅射边成相能够获得单晶的沿C轴外延的YBaCuO薄膜。

Before and after annealing, the structure characteristics have been tested with double-crystal x-ray diffractometer, and the electric characteristics have been obtained with Hall testing system.

分别用双晶X射线衍射仪和霍尔测试系统测试了LT GaAs退火前后的结构特性和电学特性。

Interaction between fusion peptide of influenza virus A and its related antisense peptides was studied. A peptide was screened out with high binding ability to fusion peptide and the dissociation constant was shown at the level of umol/L. In order to quantitatively characterizing the affinity interaction, a system consisted of quartz crystal microbalance biosensor and flow injection analysis was designed and established.

据此初步结果，研究了甲型流感病毒融合肽与其反义肽的相互作用；提出了基于反义肽的组合化学法筛选目的多肽或蛋白质的亲和配基的全新的研究思路，筛选到了与融合肽具有强相互作用的多肽，其与融合肽的解离常数达到umol/L。

Special door chain, open and close more conveniently, liquid crystal plane operating system, around is water seal tank.

独特门链，开闭箱门轻松自如，采用液晶平面操作系统，四周水封槽无盐雾溢出。

Five novel torsion-mirror optical actuators including double-beam thickness differential structure with single torsional axis, double flexible folded-beam structure with single torsional axis, double-beam vertical torsion comb structure with single torsion axis, four-beam differential compound-micromirror structure with double torsional axis and the combined structure of the four basis forms above, are brought forward. All of these devices could be fabricated by the same silicon micromachining process we have developed. The deformation compensation design with local enhancement for the thin torsional beam which is the key structure of these devices is also put forward to improve the reliability. The three-dimension solid model and two-dimension reduced order model of the torsion-mirror optical actuator are established and then the numerical simulations for evaluating the device characteristics of the statics, dynamics, electrostatic field, mechanical and electrostatic coupling, fluid and solid coupling are carried out to optimize the structure design. Furthermore, three optical fibre clamping structures which could be integrated monolithicly are designed and analyzed to improve the optical coupling capability. 4. Three flexible process flows combined with bulk silicon micromachining and surface silicon micromachining are brought forward to fabricate these novel single-crystal silicon or polysilicon torsion-mirror optical actuators by using the same lithography masks for both SOI wafer and regular silicon wafer. A series of important process experiments are carried out to optimize the process parameters and the process flows. Some novel and typical process phenomena which occurred during the microfabrication are analyzed and then the corresponding solutions are put forward. 5. A MEMS dynamic testing system which exploit blur image synthetic technique, stroboscopic image matching technique, stroboscopic mirau microscopic interferometry technique and microscopic laser dopper vibrometer technique is set up to measure three-dimension and six-freedom micro motions of any MEMS devices with nanometer resolution.

在对硅微机械扭转镜光致动器的光机电特性系统地理论研究的基础上提出了硅微机械扭转镜光致动器的结构设计准则。3、提出了单轴双梁厚度差分结构、单轴双柔性折叠梁结构、单轴双梁垂直扭转梳齿结构、双轴四梁差动复合微镜结构以及以上四种基本结构组合后的衍生结构等五种工艺加工技术兼容的新型的硅微机械扭转镜光致动器，对器件关键结构薄厚度、高耐疲劳扭转梁进行了局部加强的变形补偿设计，建立了器件的三维实体模型以及两维降阶模型，对提出的新结构硅微机械扭转镜光致动器进行了系统的静力学、动力学、静电场、力电耦合和流体固体耦合的建模仿真与优化设计，同时设计并分析了三种可实现单芯片集成的弹性光纤定位夹紧结构。4、提出了组合体硅微加工技术与表面硅微加工技术、兼容同一套光刻版图、可分别基于SOI 晶片和普通Si 晶片、适应于制造提出的各种新结构单晶硅和多晶硅硅微机械扭转镜光致动器的三套柔性加工工艺流程，开展了一系列重要工艺步骤的单项工艺试验，对工艺流程与工艺参数进行了优化，针对加工过程中出现的具有普遍意义的典型工艺问题进行了讨论和分析，并提出了解决方法。5、创新性地将模糊图像合成技术、频闪图像匹配技术、频闪Mirau 显微干涉技术与显微激光多普勒测振技术有机结合，建立起了一套周期运动测量与瞬态运动测量相结合、单点运动测量与全视场运动测量相结合、满足不同MEMS 器件各种动态测试要求的集成的MEMS 三维六自由度微运动精密测量系统。

In basic aqueous system, large single crystal of 〓and 〓 were obtained, it wasthe first time that the double salt 〓 was synthesizedfrom aqueous solution.

在碱性条件下，首次合成了以质子化的有机胺为阳离子的无水偏钒酸盐单晶〓；首次以水热法合成了无水偏钒酸盐复盐〓单晶。

According to the requirement of precision diameter measurement of the single crystal silicon sphere, the principle and characteristics of the measuring system were presented, and mathematical models were established for calculating the ellipticity of concentric interference rings with different beam incident angles.

针对标准单晶硅球直径精密测量的需要，本文在介绍标准硅球直径测量系统原理并分析其光路特点的基础上，根据建立的数学模型，对激光束斜入射标准板时产生的椭圆干涉图像进行了分析，并对不同入射角度时干涉环中心点带来的直径测量误差进行了研究。

The results show that liquid zinc would nucleate and grow up rapidly on the surface of crystal nucleus eradiation equipment with cooling system when the vibrant equipment was inserted into zinc solution.

为提高铸坯的等轴晶率和凝固组织的均匀性，以金属锌为研究对象进行了大量的振动激发金属液形核实验。

A system design of reactive ion etcher, which is based on the demand of photonic crystal fabrication, is presented in this paper from the angle of research and experiment. And then the demonstration is also presented.

本文基于光子晶体的实验室制备的需要，从科研和实验应用的角度，提出了一种反应离子刻蚀机的设计方案并对之进行论证。

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。