查询词典 anharmonic

The establishment of the theoretical models of NLO materials from anharmonic to double radical model, has enriched and increased greatly people's knowledge about NLO materials.

六十年代末期以来，随着量子化学的发展和计算机的普及，人们在定量计算的基础上，陆续提出了电荷转移、阴离子基团、双重基元模型。

As mentioned above, this dissertation can be divided into two parts. One is devoted to study the high resolution ro-vibrational spectra of some asymmetry top molecules, such as D〓O and DOCl. Another is about studying anharmonic force field and vibrational intensities of some symmetry top molecules by quantum chemistry method, such as SiHCl〓 and AsH〓.

因此本论文的工作以此为脉络分为两个部分，第一部分以D〓O和DOCl分子为体系，研究非对称陀螺分子的高分辨振转光谱；第二部分以对称陀螺SiHCl〓和AsH〓分子为体系，用量子化学计算的方法研究了小分子的非谐性力场和振动光谱强度。

Chapter three pays attention to three anharmonic properties, bulk modulus , Grüneisen parameter and thermal expansion coefficient along with their higher order quantity, which is widely interesting to people. Starting from the analysis of quantities of experimental data, we propose some new computing model and formulas on the volume and pressure dependence of, and , i.e.,, and. Comparisons with experimental data make clear that these new computing formulas are all in agreement with experiment and improve the former works in different degree, so they have good validity and reliability.

在分析大量实验数据的基础上，提出了关于这三个非谐性质对体积压强依赖性的新计算模型和公式，即、、，和实验数据相比表明，新的计算公式得到的结果和实验吻合很好，均在不同程度上改进了前人的工作，具有较好的实用价值。

In brief, surrounding EOSs of solids at high temperatures-high pressures, this paper makes worthy explorations on the expressions of EOSs and anharmonic properties of solids, present some new approaches for theoretical predictions of behaviors for solids at high temperatures-high pressures.

总而言之，本文围绕高温高压下固体的EOS，对EOS的形式及非谐性质研究作出了有益的探讨，为固态物质系统行为的理论预测提供一些新的视角。

It is demonstrated experimentally that the anharmonic property of the quadrupole trap can be exploited to cool trapped atoms by modulating the trap potential anisotropically.

通过周期性地调制势阱，从实验上证明了四极阱的非简谐特性可以被用来冷却被囚禁的原子。

By using a multiple scales method,we study the lattice vibration of a monoatomic chain taking into account the nearest neighbour and the second next nearest neighbour harmonic and anharmonic interactions.

利用多重尺度法，研究了谐振、非谐的近邻和次近邻相互作用下单原子链的晶格振动行为，发现非传播孤子在单原子链Brillouin区的任何位置均有可能存在。

The improved variational-perturbation method based on integral equation (variational-integral perturbation method) is applied to solve the quartic anharmonic oscillator in the ground state.

利用基于积分方程的改进的变分微扰方法求解四次方非谐振子基态。

In chaPter 2, thesemethods are emPloyed to inveStigate the wave motive equation of amonatomic chain Wth second nearest-neighbor harmonic andquartic anharmonic interactions get a new linear dispersion relation.

第二章研究了涉及次近邻谐振和四次非谐相互作用下的单原子链中的波动问题，得到了新的色散关系。

Treating the anharmonic terms of potential energy as perturbations,and employing the formulas for atomic displacements and Hamiltonian in phonon occupation number representation ,the formulas for thermal expansion coefficients of crystal nano-wires are derived and the numerical calculations are carried out in this paper.

将原子间相互作用势的非谐项作为微扰，运用声子数表象中的晶格原子振动位移和晶格振动哈密顿公式，推导了纳米晶体线的热膨胀系数公式，并进行了数值计算。

Then we present our studies on several novel quantum phenomena in the rotating and molecular BECs. In the averaged vortex approximation, a fast rotating BEC in an anharmonic potential is studied in variational method.

研究结果很好地解释了实验中所呈现出的许多令人迷惑的新奇现象；同时，证明了在非简谐振子势下，快速旋转的BEC中能够形成带多个单位角动量的涡旋。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。