查询词典 Poisson bracket

According to the Poisson equation of gravity-magnetic potential, we derive the relation of cosine transform spectrum between magnetic potential and magnetic field constituent and deduce the cosine transform spectrum formula of n degree derivatives using the cosine transform.

根据重磁位场的泊松公式，利用余弦变换给出磁位与磁场分量间的余弦变换谱关系，推导出磁异常n阶导数的余弦变换谱公式。

The other is the difference of the original wind and the harmonic part, which is the solution of Poisson equation with homogeneous boundary condition and can be expanded into double Fourierism cosine series.

第一部分是Laplace方程在给定边界条件下的解，由于Laplace方程的解是调和函数，这个部分可称为调和部分，又因为其与区域内部值无关，也称外部部分。

In the fourth chapter, we explain that the functionuce is a covariant functor in the category of Novikov-Poisson Algebras at first.

在第四章中，我们首先说明了uce函数是Novikov-Poisson代数范畴上的共变函子。

By determining the individual effects of configurations and material properties through modeling, a 3-D sequencing map covering the span of compliance, Poisson's ratio, and piezomagnetic coefficient ratio of the magnetostrictive phases is developed to predict the homogenized M-E voltage coefficient,, curves.

在利用等效磁电参数 a 量化了各个配置的磁电耦合效应后，我们发展了一个涵盖了全范围磁致材料的 compliance 、 poisson's ratio 、以及 piezomagnetic coefficient ratio 等材料性质的万用排序空间图。

The lack of consistent high Poisson′s ratio (≥0.30) shows that widespread partial melt does not exist within the curst, but does not exclude the presence of local partial melt.③There is an obvious thickened zone of the mantle transition zone compared with IASP91 standard value which varies from 10 km to 26 km in Qiangtang terrane. The anomaly suggests that the temperature is about 100 ℃ to 260℃ lower than global average value within the mantle transition zone, and it may be attributed to the presence of a subducted slab within the mantle transition zone.

缺乏高的泊松比(≥0.30)分布表明青藏高原东南缘的地壳不存在广泛的部分熔融，但是不排除局部部分熔融的存在；③青藏高原东南缘的羌塘地体内存在一个比较明显的、异常变化范围为10～26 km的地幔过渡带增厚区域，其对应着地幔过渡带内100℃～260℃的温度降低，可以推断与此异常区域的地幔过渡带内存在俯冲的板块有关。

Poisson's equation:In space where the source density is ρ, the Laplacian of a : potential U is 2 U = 4πρK, where is the operator del and K is a constant (gravitational constant in case of mass and gravitational potential).

泊松方程：在源密度为ρ的空间中，位场 U 的拉普拉斯算子为： U = 4πρK，。在米-千克其中为 del 算子，K 为常数(质量的万有引力常数和重力势)秒单位制中应去掉常数 4π。

For the low-frequency waves, a dispersion relation is derived from the set of continuity,momentum, and energy equation, together with Poisson equation.

其中受阻尼的静电尘埃回旋波是本文首次发现的。三支模的阻尼都是由尘粒和中性气体碰撞引起的。

First, time series of spontaneous spike trains of auditory nerve, which represent Poisson distribution in time field, are pure stochastic process, or process which have inherent temporal regularity, that is, inherent deterministic mechanism?Second, if the process have inherent deterministic mechanism, how to depict it?

我们关心的问题是：一、在时间轴上放电间隔分布呈泊松分布的听神经自发放电时间序列，是一单纯的随机过程，还是具有某种内在的时序规律性，或称之为内在确定性？

By supposing the ion sphere model, the self-consistent field method between the Poisson-Boltzmann equation and the Dirac equation is used to calculate the energy levels of H-like neon immersed in hot and dense plasmas.

采用离子球模型，通过自洽求解Poisson方程和Dirac方程，得到氖的类氢离子低能级组态的能级能量随等离子体电子温度和电子密度的变化关系，进一步研究了等离子体电子温度和电子密度对光谱漂移的影响。

In this paper, the modeling theory of multi-rigid-body dynamics was thoroughly investigated in order to make up the shortcoming in the above modeling method. The major research achievements are as follows:①Based on the matrix of direction cosine between the body-fixed base and the reference base, and Poisson equation of a rigid body rotating, the coordinate transformation method for the modeling of treelike multi-rigid-body dynamics is derived. The method is very routinization and easy to use the computer to carry on the symbol derivation.

本文针对上述建模方法存在的不足，深入地研究了多刚体系统动力学的建模方法，并将所研究的新方法应用于惯性振动设备的建模，取得的主要研究成果如下：①基于刚体连体基关于参考基的方向余弦矩阵和刚体转动的Poisson方程，导出了建立树形多刚体系统动力学方程的坐标变换法，其过程极其程式化，便于利用计算机进行符号推导。

"The operators will suffer a temporary decrease in the number of consumers and short message services as people may not like having to provide their ID cards for a phone number," Xu Junqi, vice-dean with the Policy-Making Institute of the Telecommunications Research Centre under MII, said yesterday.

信息产业部下属的通信决策研究院副主任徐俊其昨天说：&实行手机实名制后，人们可能不太情愿用身份证注册手机号，所以通信运营商会暂时面临用户减少和短信用户减少的问题。&

I don't believe in make-believe!

我不相信这些虚构的故事。