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We fit the anisotropic interaction potential based on the Murrell-Sorbie potential function for He-HCl system by applying the interaction energy data, which are calculated at the theoretical level of the single and double excitation coupled-cluster method with noniteractive perturbation treatment of triple excitation CCSD. The new potential model is compared with other potential models. The differential scattering cross sections for collisions between He atoms and HCl molecules are calculated by using CC (Close-Coupling) method. Furthermore, the changing regularity of the inelastic differential scattering cross sections is summed up.
根据在CCSD/aug-cc-pVQZ理论水平下计算的He-HCl相互作用能数据,作者采用Murrell-Sorbie势函数形式拟合了He原子与HCl分子相互作用的各向异性势,并与其它势模型进行了比较;然后采用公认的精确度较高的CC近似方法计算了He-HCl碰撞体系的微分散射截面,总结了非弹性微分散射截面的变化规律。
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In the single crystal of C60 with a FCC structure,positron mainly appears outside the C60 molecule.The main annihilation space is the interspace between molecules.The calculated positron bulk lifetime in C60 is 352ps, which agrees with experiment value of 356ps in literature.In carbon nanotube bundles with different dimeters,as the diameter of carbon nanotubes increases,the main space where positron appears changes from the interspace of carbon tubes to the space inside carbon tubes,the radio between positron annihilation with valence eletrons and core eletrons becomes larger,the positron bulk lifetime in carbon nanotube increase rapidly first and come to be a constant at the end.The calculated positron lifetime of carbon nanotube with a dimeter of 0.8~1.6ns is 332~470ps,which agrees with the experiment value of 394ps.Positron annihilation has been studied in widly used compound semiconductors.
计算结果表明:在片层结构的石墨晶体中,正电子主要在石墨层间的空隙中湮没,计算出的石墨中的正电子寿命为208 pS,与文献中的实验结果215 ps符合很好;在金刚石单晶中,正电子主要在碳原子之间的空隙中存在并发生湮没,计算出的金刚石中的正电子寿命为115 ps,文献中的实验结果110 ps左右符合;在面心立方结构的C60晶体中,正电子主要在C60分子球壳内外侧及分子之间存在,C60球形分子中心正电子分布很少,正电子的湮没区域集中在C60分子之间的空隙区域,计算出的C60中的正电子寿命为352 ps与文献中的实验结果356ps相符合;对于不同管径碳米管束中的正电子分布,随着碳纳米管直径的增加,碳纳米管束中的正电子由主要在碳纳米管管间的区域出现转变为主要在碳纳米管管内中心的区域出现:碳纳米管束中的正电子与碳原子的价电子的湮没概率变得越来越大,与核心电子的湮没概率变得越来越小;碳纳米管束中正电子的湮没寿命先迅速增大,而后趋于一定值。
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For the diffractive optical element realizing beam shaping in the fractional Fourier transform domain,the transform matrix calculated by the discrete sampling points was compared with that calculated by the Fresnel integral,and the discretization error of the intensity distribution on the output plane was qualitatively obtained.
针对分数傅里叶变换衍射光学光束整形器件,比较了按离散点与按菲涅耳积分计算得到的变换矩阵间的差距,从中分析得出按离散点计算的变换矩阵引入的离散化误差与分数傅里叶变换系统参数的关系。
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The main work can be summed up as follows: Firstly, we studied the thermal-field properties of VCSELs, and analyzed the influences of current spreading, material parameters and operating conditions on the temperature distributions. Secondly, we began with the electrode voltage and calculated the equipotential s distributions, compared the distributions of voltages and current densities in different depths of VCSELs, and then studied the influences of the oxide-confining region with different position or thickness, and the different sizes of the gain-guided aperture and emitting window on the distributions of the injected current density, carrier concentration and temperature in the active region. Thirdly, we realized the coupling of electricity, optical and thermal-fields, worked out the threshold voltage, calculated the distributions of the injected current density, carrier concentration and temperature under different offset voltages, and analyzed the impacts of temperature profile and carrier density on the refractive index, Fermi levels and optical-field. Finally, we gave the equipotential line distributions with considering N-DBR and double oxidized-confining regions, and analyzed theinfluences of N-DBR and double oxide-confining regions on the distributions of the current density, carrier concentration, temperature and optical-field.
具体工作可以概括如下:首先,研究了VCSEL的热场特性,分析了电流扩展,材料参数和工作条件对于温度分布的影响;其次,从电极电压入手,计算出激光器中的等势线分布,并对不同深度处的电压和电流分布进行比较,研究了高阻区的不同位置和不同厚度、限制层和出射窗口半径的大小对电流密度、载流子浓度和温度分布的影响;再次,实现了电、光、热耦合,求出了阈值电压,计算了不同偏置电压下的电流密度分布、载流子浓度分布和热场分布,分析了温度和载流子浓度变化对折射率、费米能级和光场的影响;最后,给出了考虑N-DBR和双氧化限制层时激光器中的等势线分布,分析了N-DBR和双氧化限制层对VCSEL电流密度、载流子浓度、温度和光场分布的影响。
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The structure,voltage-dividing theory and design method of the load were presented. The influence of skin effect on the load's resistance in high frequency was analyzed. The distribution of electric-field intensity in the load and vacuum cavity was calculated. The equivalent capacitance and inductance of the load were calculated,of which the influence on the output waveforms was simulated using Pspice program.
介绍了电阻分压器型负载的结构、分压原理和设计方法,分析了高频作用下趋肤效应对负载阻值的影响,计算了负载和真空腔内的电场强度分布以及负载的等效电感和等效电容,利用Pspice程序模拟了回路参数对输出信号的影响。
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The non-relativistic energies and wave functions were determined by Rayleigh-Ritz method. The relativistic effects, including the correction to kinetic energy, the electron-electron contact term, and the orbit-orbit interaction, Darwin term, and mass-polarization effect on the energies were calculated by using first-order perturbation theory. In order to obtain a more accurate result for the larger Z system, the quantum-electrodynamics correction should be included. This correction to energy can be evaluated for the valence electron by using a hydrogenic formula with an effective nuclear charge, Z. The ionization potential, the excitation energies and the fine structure split-tings for a lithium-like ion with higher nuclear charge (Z=26) were calculated.
非相对论能量用Rayleigh-Ritz变分法确定,包括动能修正、电子—电子接触项、轨道—轨道相互作用项以及Darwin项的相对论修正和质量极化项由全实加关联波函数的一阶微扰给出,量子电动力学修正由有效核电荷方法和类氢公式计算;给出了较高核电荷(Z=26)类锂体系1s^2nl组态的电离能、激发能和1s^2np组态的精细结构劈裂。
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This paper calculated the fast neutron flux of some places in different HFETR cores, such as the 13 ion chamber and L12 fuel rod in the 1 core, the 12 ion chamber and the 1QS ion chamber in the 68-Ⅱ core. Comparison of the calculated and the experimental results was made. It showed that the result was accurate.
用MCNP4C程序分别计算了高通量工程试验堆首炉13电离室和L12元件、第53-Ⅰ炉13电离室和7电离室、第68-Ⅱ炉12电离室和1QS的快中子注量率并与实验测量值比较,计算结果是可靠的。
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In principle, the maximum sharing limit for the petty sharing system shall be calculated by the month, that is, the total amount that is taken according to needs each month must not go beyond the maximum limit; the maximumsharing limit of the large sharing system shall be calculated every half year, that is, the total amount that is taken according to needs every half year should not go beyond the maximum limit.
原则上要求,小额共享制按月计算最高共享限额,即每月按需取用的总额累计不能超过最高限额;大额共享制按半年计算最高共享限额,即每半年按需取用的总额累计不能超过最高限额。
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By using FEM technology, the strength of bracket is calculated. Taking the influences of tank and gooseneck on the bracket in consideration, the calculated result is consistent with practice.
托架的强度计算采用有限元方法,考虑了罐体和鹅颈部分对拖架的影响,得出了较为符合实际的计算结果。
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In design of rectifying unit to separate toluene-titanium tetrachloride,according to design projects,the theoretical plates of rectifying tower were calculated by the software with graphical calculation of theoretical plate.The tower load parameters in now running float valve tower were checked by the KG-TOWER float valve tower checking softwarel.The packing-tower diameter was calculated by high-effciency structured packings and hydraulic calculation softwocre.The evaluation through calculating data of valv...
在设计分离甲苯—四氯化钛的精馏化工单元中,依据设计任务,通过使用图解法计算理论板软件,计算精馏所用的理论板数;运用KG—TOWER浮阀塔校核软件,对现用浮阀塔进行塔负荷等参数的校核;采用等板数较大的高效规整填料与精馏塔水力学计算软件,来计算填料塔的塔径;通过对浮阀塔和填料塔的计算数据进行评价,得出结论认为选用填料塔设计优于浮阀塔设计。
- 相关中文对照歌词
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- 推荐网络例句
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In the United States, chronic alcoholism and hepatitis C are the most common ones.
在美国,慢性酒精中毒,肝炎是最常见的。
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If you have any questions, you can contact me anytime.
如果有任何问题,你可以随时联系我。
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Very pretty, but the airport looks more fascinating The other party wisecracked.
很漂亮,不过停机坪更迷人。那人俏皮地答道。