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近似模型
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  approximate model
    Approximate Model of Transition Amplitude in Collisions of B~(2+)Ions with H Atoms
    B~(2+)+H碰撞中跃迁振幅的近似模型
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    According to the interaction approximate model of the CO-Pt system between CO and a Pt surface,using finite difference equation and quantum-mechanical method,the numerical solution of the wave function of CO-Pt system is obtained by solving the Schrdinger equation of CO-Pt system with the Rose-like potential.
    根据CO分子吸附在过渡金属Pt表面的CO-Pt体系相互作用近似模型,采用类Rose势,利用有限差分方程和量子力学方法求解CO-Pt体系的Schr dinger方程,得出CO-Pt体系波函数的数值解.
短句来源
    Approximate Model on Transform of Beam Characteristics in Frequency Tripling
    三倍频激光束特性传输变换的近似模型
短句来源
    From the theory of Quantum Mechanics, using the approximate model of monoatomic molecular harmonic oscillator, we get the equation of Zero-amplitude:and indicate, according to the informations of Spectros copy, that near absolute Zero temperature, helium atom is the most likely to exist in liquid form.
    本文用单原子分子谐振子近似模型,根据量子力学理论,得到单原子分子的零振幅公式:再根据光谱数据,利用上公式,指出了在接近绝对零度时,最可能以液态存在的只有氦原子。
短句来源
    The excitonic states and the intersubband optical absorption within the conduction band of quantum well have been studied theoretically by using an approximate model of single quantum well.
    采用单量子阱近似模型 ,对 In Ga N/ Ga N量子阱中的激子和电子在导带子带间跃迁的光吸收效应进行了理论分析和数值计算 .
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    Ab initio calculations of optical-phonon deformation potentials (ODP)d_(30), d_(10), (val) and d_(10) (cond) on A-axis in Brillioun zone for the compounds GaAs and AlAs are reported. The study is based on a frozenphonon model and using the LMTO-ASA method with a frozen-potential approximation, in which the displacement of the empty sphere was considered ~+o match its atomic sphere partners.
    本文以冻结声子近似模型,采用空球随原子球位移的冻结势近似的LMTO-ASA计算方案,研究了GaAs和AlAs布里渊区Λ轴的光学声子形变势的计算,得到Γ点和Λ轴光学声子形变势d_0,d_(30),d_(10)(val)和d_(10)(comd)的第一性原理的计算结果。
短句来源
    IOS(infinite order sudden) approximation,the hyperfine collisional transitional rate coefficients of E - type CH3CN - H2 have been calculated under the conditions of interstellar molecular clouds.
    利用IOS近似模型,计算了星际分子云条件下E型CH3CN-H2含超精细能级的的碰撞跃迁速率系数。
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    The investigation of the factors affecting quantum Size effects of the confined exciton ground state energy in the Semiconductor Quantum Dots is based on the effective mass approximation (EMA) model and the experimental data.
    在有效质量近似模型和实验数据的基础上,以CdS和CdSe小量子点系统为研究对象,分别在强受限区域和弱受限区域,分析有效质量、介电常数、势垒高度等因素对受限激子基态能谱量子尺寸效应的影响.
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    PROVING THE EMPIRICAL RELATIONS OF THE COVALENT BOND LENGTHS WITH A APPROXIMATE PHYSICAL MODEL
    共价键长间经验关系的近似模型证明
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    Differential scanning calorimeter (DSC) combined with melt fluxing technique was used to realize undercooling of melt and its specific heat was measured at the same time, and its thermodynamics were calculated simultaneously and compared to four well-known models.
    本文将差示扫描量热法(DSC)和助熔剂处理技术相结合,研究了熔体的过冷现象,测量了过冷状态下熔体的比热,计算了过冷熔体凝固过程中的其它热力学参数,并与四种近似模型进行了比较分析。
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  approximate model
On the basis of an approximate model of filtration with drainage washings of a soil layer with a water-impermeable base [1], shown schematically in Fig.
      
In [1], the present author investigated an approximate model of two-dimensional flow in the case of leaching of soil in the presence of an impermeable layer when the depression curve is replaced by a fixed horizontal boundary.
      
An approximate model of the flow is constructed and an analytic solution is obtained for the location of the boundary of the multicycle jet.
      
A brief description is given of the approximate model for the calculation of temperature fields, which simplifies the processing of experimental data
      
Theoretical models of heat transfer by radiation through a vapor gap under conditions of film boiling of liquid are treated, namely, a general wave model for a gap of arbitrary thickness and an approximate model of geometrical optics.
      
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A glycino-metal complex is used as a model compound in the work for studying the interaction in protein-metal. The infrared spectra of H2O-cis-bis (glycino) Zn (II) complex has been measured in the range of 4000 to 250cm-1. By means of GF-matrix method and the approximate model of Urey-Bradley force field, the vibrational force constant in this complex has been calculated. The Zn(II)~N and Zn(II)-O stretching force constants have the same value of 0.75mdyn/A. The band assignments for its infrared spectra have...

A glycino-metal complex is used as a model compound in the work for studying the interaction in protein-metal. The infrared spectra of H2O-cis-bis (glycino) Zn (II) complex has been measured in the range of 4000 to 250cm-1. By means of GF-matrix method and the approximate model of Urey-Bradley force field, the vibrational force constant in this complex has been calculated. The Zn(II)~N and Zn(II)-O stretching force constants have the same value of 0.75mdyn/A. The band assignments for its infrared spectra have been carried out; the M-N and M-O stretching model have been assigned at 450cm-1 and 285cm-1 respectively. The correlation of the force constant for the coordination bond with the stability constant has been studied and the stability order obtained in this work is in agreement with the frying-Williams order of stability. The calculation was carried out by a DJS-130 computer using a special program for this work.

本文以甘氨酸-金属络合物作为研究复杂分子蛋白质-金属相互作用的模拟物质,在4000-250cm-1的范围内测定了水-反二甘氨酸 Zn(Ⅱ)络合物的红外光谱,并用 GF矩阵法,采用UBF力场近似模型,计算了甘氨酸 Zn(Ⅱ)络合物的振动力常数。计算的结果为: Zn—N, Zn—O伸缩力常数具有相同的数值,都等于 0.75mdyn/A,我们还进行了红外谱带的归属工作,把该络合物的Zn—N与Zn—O伸缩振动分别归属为450cm-1和285cm-1 根据计算的结果,我们探讨了第一过渡金属与甘氨酸的络合物中M-N和M-O伸缩力常数跟它们的稳定性常数之间的关系,结果表明,它们伸缩力常数的大小顺序跟稳定性的Irving—Williams顺序一致的。 为计算力常数,编制了计算机程序,并在DJS—130计算机上完成了本工作。

Helium is such an atom which has the lowest critical temperature, the greatest ionization energy and is the most stable, it is the last to be liquefied. From the theory of Quantum Mechanics, using the approximate model of monoatomic molecular harmonic oscillator, we get the equation of Zero-amplitude:and indicate, according to the informations of Spectros copy, that near absolute Zero temperature, helium atom is the most likely to exist in liquid form. At the end of this paper, using the atomic energy levels,...

Helium is such an atom which has the lowest critical temperature, the greatest ionization energy and is the most stable, it is the last to be liquefied. From the theory of Quantum Mechanics, using the approximate model of monoatomic molecular harmonic oscillator, we get the equation of Zero-amplitude:and indicate, according to the informations of Spectros copy, that near absolute Zero temperature, helium atom is the most likely to exist in liquid form. At the end of this paper, using the atomic energy levels, we discuss the reason why the hilium atom has the greatest ionization energy.

氦是临界温界最低,最后一个被液化、电离能最大、最稳定的一种原子。本文用单原子分子谐振子近似模型,根据量子力学理论,得到单原子分子的零振幅公式:再根据光谱数据,利用上公式,指出了在接近绝对零度时,最可能以液态存在的只有氦原子。最后利用原子的能级,讨论了氦原子电离能最大的原因。

From the basic principles of statistical physics, we have obtained the more general conditions that the convolution law of the density of states of the system and its subsystems or that of the high-dimensional system and low-dimensional system is satisfiled. We also analysed the transition of densities of states from the l-dimension to the 3-dimension in the free electron and tigkt-binding periodic systems.

本文从统计物理的基本观点出发,给出了不同维度的态密度之间,或系统与子系统的态密度之间,存在卷积规律的比较一般的条件及证明。并分析了自由粒子和简单立方晶格紧束缚近似模型从一维向二维、三维转变过程中态密度的变化规律。

 
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