六角形燃料组件内精细核密度分布计算

介绍一种可用于六角形燃料组件的精细计算方法，在理论模型上编制了精细计算程序ＪＸＪＳ：ＪＸＪＳ计算结果与用文（１）提供的方程计算出的结果进行了比较。并对结果进行了误差分析。     

Permanent Magnetic Properties of Melt-Spun YCo5Cx Ribbons

Ribbons of nominal compositions YCo5 Cx （x = 0, 0.2, 0.4, 0.6） are prepared by melt spinning at surface velocities v = 5, 10, 15, 20, 25, 30 and 35 m/s. YCo5 ribbon is crystallized in a single YCo5 phase of hexagonal CaCu5 structure. A small quantity of YCoC2 phase appears in the ribbons with C addition besides the YCo5 phase. With the increase of x the lattice constant c increases and a along with the unit cell volume decreases. The largest values of iHc = 888 kA/m and （BH）max = 58.4 k Jim3 at present for the YCo5 ribbon system were obtained with x = 0.4 and v = 20 m/s. The improvement of the permanent magnetic properties is rooted in the refinement of the microstructure and the appearance of the YCoC2 phase which can act as domain wall pinning centers.     

Inhomogenous Dislocation Nucleation Based on Atom Potential in Hexagonal Noncentrosymmetric Crystal Sheet

By introducing internal degree, the deformation of hexagonal noncentrosymmetric crystal sheet can be described by the revised Cauchy-Born rule based on atomic potential. The instability criterion is deduced to investigate the inhomogeneous dislocation nucleation behavior of the crystal sheet under simple loading. The anisotropic characters of dislocation nucleation under uniaxial tension are studied by using the continuum method associated with the instability criterion. The results show a strong relationship between yield stress and crystal sheet chirality. The results also indicate that the instability criterion has sufficient ability to capture the dislocation nucleation site and expansion. To observe the internal dislocation phenomenon, the prediction of the dislocation nucleation site and expansion domain is illustrated by MD simulations. The developed method is another way to explain the dislocation nucleation phenomenon.     

创新科技发布Sound BlasterAxx声霸卡音箱

2012年8月14日，创新科技在北京丽亭华苑酒店召开发布会，发布了旗下Sound BlasterAxx新一代声霸卡音箱。该产品采用简洁的六角形外观．一体化设计，不但音质出色．而且功能强大，能够方便地与电脑或智能手机匹配．听音乐，看电影、打电话等功能一应俱全，充满了划时代的科技感。     

Ab Initio Study of Structural and Electronic Properties of Hexagonal BC2N

We investigate hexagonal BC2N in graphite unit cells using the first-principles method and calculate the total energies, lattice parameters, and electronic band structures after full relaxation. It is shown that stable hexagonal BC2N should be stacked sequentially with one graphite layer and one h-BN layer. The density of states indicates that this structure should have metallicity.     

外磁场中的多节点六角形超导网络相边界

本文用矩阵方程的本征值解法求得了七节点、十九节点及三十七节点三种六角形超导网络在外磁场中的正常－超导相边界,讨论了多节点六角形网络相边界的极限行为。并对该算法的意义进行了探讨。     

A two—dimensional photonic crystal with six large bandgaps formed by a hexagonal lattice of anisotropic cylinders

The plane-wave expansion method is used to calculate the band structure of a two-dimensional photonic crystal formed by a hexagonal structure of anisotropic cylinders. Two cylindrical inclusions in the unit cell have two different radii, R₁ and R₂ (R₁2). By reducing the symmetry of the structure and choosing appropriately parameters R₂ and s=R₁/R₂ (s<1), we obtain six large complete bandgaps, among which three are over 0.05 ω_e (where ω_e=\frac{2πc}{a}) in the high region of the normalized frequency (however, one of these over 0.065 ω_e is not stable). There are two other stable complete bandgaps in the low-frequency region.     

毛细管电子

微结构光纤由一个中心核以及一组沿光纤长度方向环绕在中心核周围，呈六角形排列的空毛细管组成。在将电子直接植入纤维这一技术上，该研究小组已朝着计划的发展方向迈出了重要的一步。     

随机取向六角形冰晶粒子的散射特性研究

利用离散偶极子近似方法研究卷云中随机取向六角形冰晶粒子的取向比对散射特性的影响,数值计算了在小尺度范围内随机取向六角形冰晶粒子的散射特征量,包括散射相函数、消光效率因子、不对称因子、单次散射反照率和线偏振度。研究表明:取向比对随机取向六角形冰晶粒子散射特征量的影响比较明显,并且此影响随着粒子尺度参数的变化而变化,与入射波长无关;相同尺度参量和不同取向比粒子的散射相函数的角分布曲线均有一个交点,并且随着粒子尺度参量的增加,交点所对应的散射角度值逐渐向小角度方向移动。此研究结果为气溶胶粒形检测和识别提供了理论依据。     

Superlattice Patterns in Coupled Turing Systems

In this paper, superlattice patterns have been investigated by using a two linearly coupled Brusselator model. It is found that superlattice patterns can only be induced in the sub-system with the short wavelength. Three different coupling methods have been used in order to investigate the mode interaction between the two Turing modes. It is proved in the simulations that interaction between activators in the two sub-systems leads to spontaneous formation of black eye pattern and/or white eye patterns while interaction between inhibitors leads to spontaneous formation of super-hexagonal pattern. It is also demonstrated that the same symmetries of the two modes and suitable wavelength ratio of the two modes should also be satisfied to form superlattice patterns.