查询词典 two-dimensional distribution

The relations between the potential difference and the discharging time when the discharge current is a step function as well as a step function containing high frequency vibrations, the relations between one-dimensional and two-dimensional spark locations and potential difference based on the thin wall model and the thick wall model have been studied.

仿真研究了放电电流为阶跃函数以及含高频振荡时电位差与放电时间的关系；基于薄壁模型和厚壁模型，仿真研究了电极下表面一维放电点位置和二维放电点位置与电位差的关系；对于确定的电位差，仿真研究了放电点位置的分布情况，说明两点输入不能唯一地检测出放电点位置，从而引入四点输入检测的思想。

Self-creative, self-design, production of two-dimensional, three-dimensional animation, FLASH animation, production and production scale in the same industry leading level at home and abroad.

自主创意、自主设计、生产二维、三维动画片、FLASH动画片，制作和生产规模处于国内外同业领先水平。

In this paper, the roles of variable γ and R in Arrhenius law applications are reconsidered, and their effects on the chemical reaction rate are demonstrated by simulating one-dimensional C-J and two-dimensional cellular detonations.

本文研究了变化的比热比和气体常数对Arrhenius 定律应用的影响，并通过对一维C-J爆轰波的热力学特性和二维非定常爆轰波的胞格的数值研究证实了该影响的存在性和重要性。

Finally, some examples of two-dimensional and three-dimensional bodies are given, at the same time the Richardson's extrapolations of these numerical results are calculated.

最后，给出了一些二维，三维的任意导体的数值结果，并且给出了这些数值结果的Richardson外推值，计算结果与文献以及精确解都吻合的比较好，从而说明了该方法的有效性和准确性。

The hyperfine fields of Fe hexagonal-based atomic chains are presented, the equilibrium atomic distance and electronic structure are investigated, with the comparison of the bcc Fe, two-dimensional monolayers and one-dimensional monoatomic linear chains of Fe.

国际上首次研究了基于六角结构的Fe原子链的超精细场，给出了平衡原子间距，分析了电子结构，同bcc Fe，Fe单原子层和Fe单原子链的结果进行了比较。

Computers have so far been based on two-dimensional chips made from silicon, but there are developments already well advanced to make three-dimensional chips with vastly improved performances, and even to construct them out of biological molecules that can be miniaturised even more than metal-based computer chips.

目前，二维芯片主要用硅制造，现在已经开发了更先进，能量更大的三维芯片，甚至能够用生物分子制造比金属芯片体积更小芯片。

Since range searching in three-dimensional (3-D) is expensive, and since the surfaces are in fact topologically two-dimensional (2-D) entities, point projection to a plane is used.

尽管在三维空间里范围搜索是非常耗时的并且实际上那些面在拓扑上是二维的，但还是使用了点投影到曲面。

The MUSCL method of Godunov schemes is developed to simulate the complex flow fields of two-dimensional (2-D) and three-dimensional (3-D) flow field of rocket jet impingement in this paper.

本文首次采用Godunov类数值格式中的MUSCL方法对二维、三维复杂火箭导弹燃气射流冲击流场进行了比较全面系统的理论研究和数值仿真。

This paper reviews and summarizes the progress in this field as follows: the mathematical model and the difficulty of the analytical solutions is introduced; discusses the latest progress of the numerical solutions is discussed; the finite difference method, the Godunov method, the Boltzmann method, and the KFVS method of one-dimensional dam-break problem are introduced; the TVD method, the discontinuous finite element method, the finite volume method and characteristic method of two-dimensional dam-break problem are discussed; the applicability, the advantage and the disadvantage of each method are analyzed; and the progress in the numerical calculations of flow of fluid with free surface are presented.

回顾和总结了国内外对溃坝水流演进问题的研究进展：介绍了溃坝水流的数学模型及解析解法存在的困难，进而讨论了数值解法的最新进展；论述了求解溃坝水流一维问题的有限差分法、近似黎曼解的Godunov格式法、Boltzmann法、KFVS法和二维问题的TVD格式法、间断有限元法、有限体积法、特征线法，并分析了各种方法的适用范围和优缺点，及讨论了限制函数的使用；介绍了利用自由水面追踪方法计算溃坝水流的研究进展，并根据目前存在的不足和实际工程的需要，提出了进一步研究的方向和发展趋势。

Through the Radon transformation of the normally ordered Wigner operator we introduce two mutually conjugate intermediate coordinate- momentum representations. Based on them we construct the appropriate quantum phase space theory which includes the new Wigner operator adapting to this space and construct the appropriate generalized Fredholm operator equation and then find its solution. We then deriving the Hermite polynomials operator identities by applying the Fredholm equation. We also reveal the connection between the generalized Wigner operator and the 2-dimension normal distribution in statistics, which is useful to study the quantum tomogram. As the application of the entanglement Husimi operator theory we calculate the Wigner function and the Husimi function of the one- and two-mode combination squeezed state , study their characters through drawing the three-dimensional graphics.

由正规序Wigner算符的拉登变换引入了两个互为共轭的中介坐标-动量表象，在此基础上我们建立了相应的量子相空间理论，其中包括引入适合该空间的新的Wigner算符；并在该表象的基础上，建立了广义Fredholm算符方程，求出了它的解，并运用该方程导出有关厄米多项式的算符公式；揭示广义Wigner算符与统计学中的随机变量的二维正态分布形式上的相似，这对于研究量子态的tomogram(是英文Tomography的派生词)有用。

Objective:To explore the feasibility of laparoscopy in diagnosing and treating of abdominal diseases.

目的：探讨腹腔镜用以诊断腹部外科疾病及选择治疗方案的可行性。

The lifetime of nylon 1010 and nylon 1010/POSS composites decreased with increasing temperature.

热重-红外联用分析表明尼龙1010在氮气气氛下的降解产物主要为小分子的低聚物，POSS并不改变尼龙1010降解产物的组成。