标量密度

A two-scale k-ε turbulence model was adopted to calculate turbulent velocity field, and the probability density function method was combined with the Lagrangian flamelet model to predict the turbulent scalar fields.Detailed chemical reaction mechanism GRI-Mech 3.0 was incorporated to describe methane oxidation and nitrogen oxides formation.

采用一个双尺度的 k-ε湍流模型计算速度场，将概率密度函数方法和Lagrangian火焰面模型相结合求解标量场，燃料甲烷的氧化过程和氮氧化物的生成过程采用详细的GRI-Mech 3.0机理描述。

The laminar flamelet model in combination with joint probability density function transport equation of mixture fraction and turbulence frequency is used to simulate fluctuating behavior of radiative source term in turbulent jet diffusion flames of hydrogen.

采用κ-ε湍流模型、标量联合的概率密度函数输运方程和层流火焰面模型相结合，模拟氢气自由扩散火焰中辐射源项湍流脉动特征。给出了主燃区内辐射源项湍流脉动的频率图。辐射源项的样本点分布集中，大约95%以上的样本落在其系综的±3倍方差以内，频谱图为单峰

In noncommutative scalar field theories, the appearing of nonplanar diagrams is related to permutation symmetry of field functions in the interaction Lagrangian, while in NCQED we can not arbitrarily change the positions of field functions in the interaction Lagrangian because different positions of the field functions correspond to different representations of the gauge group.

这里需要特别指出的是NCQED的非平面图产生的原因与非对易标量场根本不同，非对易标量场非平面图的产生是和相互作用拉氏量密度中场函数间位置的置换对称性有关，而在NCQED中我们不能随便交换相互作用拉氏量密度中场函数的位置，因为场函数的不同位置对应着规范群的不同表示。

ABSTRACT A three-component boundary element algorithm for the calculation of 3-d linear eddy currents is presented,which employs an imaginary magnetic charge scalar and an imaginary current density vector with two components,distributed over the interfaces of different regions,as unknowns.

提出一种计算三维线性涡流场的三分量边界元算法。该算法采用在导体表面上虚设的磁荷和电流密度为求解变量，仅需求解3个分量：虚设磁荷标量和电流密度矢量的2个分量。

The summary of the adopted models contains a two-scale k-ε turbulence model,the scalar joint probability density functiontransport equation approach,the augmented reduced mechanismfor methane oxidation (consisting of 16 species and 12 lumped reaction steps),the Euclidean minimum spanning treesmall scale mixing model etc.

所采用的数学物理模型包括双尺度的k-ε湍流模型，标量联合的概率密度函数输运方程方法，甲烷氧化的ARM简化化学反应机理(包含16种组分，12步总包反应)和欧几里德最小生成树小尺度混合模型。

What this paper discusses rainbow gravitation to fall is cruel bilge model, derived of metric field and scalar quantity field disturb equation, analysed the property that density disturbs to change along with time.

本论文讨论彩虹引力下的暴胀模型，导出了度规场和标量场的扰动方程，分析了密度扰动随时间变化的性质。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。