查询词典 Fermi

Under conditions of large unit cell, Fermi sphere approximation is unsuitable and form factors must be modified with Penn's model.

我根据这些材料特点，采用了不同的形式因子，得到收敛的计算结果，这些计算结果与实验结果非常吻合。

The phase diagram of a homogenous ultracold Fermi gas with spin polarization is studied at unitarity.

研究了超冷均匀极化的费米气体在共振区的相图。

We analyze a singly-quantized vortex in a spin-polarized Fermi gas at unitarity, based on a mean-field approach.

通过应用平均场的方法，从理论上研究了强相互作用极化费米气中单个涡旋态的结构。

It is pointed out, that if the vector and pseudo-vector coupling in the universal Fermi weak interaction propo...

指出假使在重正化以后矢量耦合和赝矢量耦合常数不再相等，那末不对称因子的数值可能有相当大的改变。

Any gate dielectric on GaAs has to be able to unpin the Fermi level and be thermodynamically stable with the semiconductor.

而对于具有更高载流子迁移率的Ⅲ-Ⅴ族半导体来说，GaAs衬底是被研究的最多的。

Using the one-atom theory, the electronic structures of Pt-electrocatalyst with fcc structure was determined as follows:(5dn)6.48 (5dc)2.02 (6sc)1.48(6sf)0.02. Compared to the result obtained by the first-principle method such as FP-LMTO, CASTEP, their results are in good agreement with each other. Comparing the calculations of physical properties such as lattice constants, cohesive energy and bulk modulus by OA method and first-principle method, the result obtained by OA method is in excellent agreement with experimental value, but the result obtained by first-principle method is not accordable. The relationship between the electronic structures and catalytic performance was explained qualitatively by OA method and first principle method according to its electronic structures. Because the d-orbital vacancies increases and static density is high around Fermi energy band, Pt has good catalytic performance.

摘 要：依据纯金属单原子理论确定面心立方结构电催化剂Pt的电子结构为(5dn)6.48(5dc)2.02-(6sc)1.48(6sf)0.02，与采用第一原理的FP-LMTO和CASTEP等方法所计算的电子结构相比较，其结果非常相近；由OA理论和第一原理方法计算的晶格常数、结合能、体弹性模量等物理参数进行比较，OA理论计算的结果与实验值较符合，而第一原理方法计算的结果与实验值相差较大；在此基础上用OA理论和第一原理方法研究了Pt的电子结构与催化性能的关系，由于d带空穴增多和费米能级附近态密度较高，导致金属Pt的催化性能很好。

Due to the short Fermi electron wavelength of metals, for a successful research of this problem, atomically flat films must be prepared, and their electronic structure, which is atomic-layer sensitive, must be accurately characterized.

由于金属电子的费米波长很短，要观察到显著的量子效应，必须要克服两个难点：既要制备出具有原子级平整度的薄膜，又要对其电子结构进行精确表征。

We introduce some important characteristic lengths such as Fermi length, mean free path, phase-relaxation length and so forth. We also give the conditions in which electrons transport ballistically and derive the basic Landauer ? Btiker conductance formula in mesocopic physics. At last the quantum bound states in bent-structure are presented.

介绍了几个常见的特征长度（费米波长、平均自由程、相位相干长度等），说明了电子做弹道输运的条件，以及介观物理研究中最基本的Landauer-Buttiker电导公式，最后还阐明了弯曲结构中存在的量子束缚态。

The unusually huge positive MR for normal fields were analyzed quantitatively with a two-band carriers galvanomagnetic effect on the ungapped residual Fermi surfaces, in which the concentration of the carriers is modified by an applied magnetic field.

分析表明：三种样品在H//c时巨大的磁阻行为不能用单一的磁场改善费米面套叠的模型或半经典的电磁效应模型来解释。我们尝试提出了综合两带电磁效应和磁场增强Perierls能隙效应的模型。

Due to the original Simmons model only predict the symmetric I-V behaviour, a modified Simmons model, which considered the observed spectra asymmetry in terms of inequivalent Fermi level shifts of the two contacts, was proposed to describe the I-V behaviour of azurin.

由于原始的Simmons模型只能预测对称的I-V特性，而实验观察到的I-V曲线是不对称的，是故本文提出了修正的Simmons模型（考虑了费米能级在两个接触界面处的不对称偏移）来描述铜蓝蛋白的I-V特性。

Article 144 The Government of the Hong Kong Special Administrative Region shall maintain the policy previously practised in Hong Kong in respect of subventions for non-governmental organizations in fields such as education, medicine and health, culture, art, recreation, sports, social welfare and social

第一百四十四条香港特别行政区政府保持原在香港实行的对教育、医疗卫生、文化、艺术、康乐、体育、社会福利、社会工作等方面的民间团体机构的资助政策。原在香港各资助机构任职的人员均可根据原有制度继续受聘。

Small wonder, then, that the Chinese spend more in the shop than any other group of foreign visitors do .

这样的小惊喜，使中国顾客比任何国家的人消费得更多。