场

First, the typhoon flow field is decomposed into two parts: the maximum asymmetric vortex and irrotational environmental flow field. Then the maximum asymmetric vortex is also decomposed into two parts: the maximum symmetric vortex and β-gyres. Finally, typhoon Pearl(2006) is simulated by WRF model(weather research and forcasting model), and flow fields at various times at 500hPa...

首先，将台风的流场分解成最大的、不对称的涡旋流场和无旋流场；然后将不对称的涡旋流场分解成最大的对称涡旋和不对称的β涡旋对；最后，利用WRF(weather research and forcasting)模式(V2.1.2)模拟了200601号珍珠台风，并对各时次的500hPa风场用该方法进行分解，结果表明：该方法对台风的运动机理研究和实际的台风路径预测提供了有价值的信息。

According to principal of field theory, the concept model of carbon-accumulation field is established, and the isopleth's surface and gradient of carbon-accumulation field are analyzed.

根据场论原理，首次建立了聚碳场概念模型，分析了聚碳场等值面和聚碳场梯度，对聚碳场碳通量的空间变化进行了局域表述。

It applied Kirchhoff expression to FDTD numerical computation of acoustic scattering problems,and iterated near field on the integral surface to far field that was contributed to,which could b.

针对此问题，提出一种新的外推方法，它将柯西霍夫公式应用于FDTD数值计算中，将积分面上每一步的近场都叠加到它有贡献的远场时刻上去，近远场变换可以与FDTD的场分量迭代同步进行，不需要将外推边界上每一时间步的场值都存储下来，减少了存储空间。

During the T-matrix method of calculating light scattering by particle, incident and scattered fields are expand into spherical vector wave functions: which, via their relationship derived from the Maxwell equations, leads to the T-matrix, a transferring matrix between expansion coefficients of fields.

在粒子光散射计算的T矩阵方法中，将入射场和散射场用球矢量波函数展开，通过Maxwell方程推出二者之间的关系-零场方程，可获得散射场和入射场展开式系数之间的传输矩阵-T矩阵。

The boundary condition of small scope is provided by the computation result of large scope, and the computation is also stable after two periods. The computation of temperature field begins and it is stable after six periods. The computation is conducted at three different tide levels, including spring tide, still tide and neap tide.

大范围的流场计算在两个周期后达到稳定，开始计算小范围的流场，小范围的边界条件由大范围计算结果提供，小范围的流场在计算后两个周期后达到稳定，开始计算小范围的温度场，温度场的计算在六个周期后达到稳定。

The boundary condition of small scope is provided by the computation result of large scope, and the computation is also stable after two periods. The computation of temperature field begins and it is stable after six periods. The computation is conducted at three different tide levels, including spring tide, still tideand neap tide.

大范围的流场计算在两个周期后达到稳定，开始计算小范围的流场，小范围的边界条件由大范围计算结果提供，小范围的流场在计算后两个周期后达到稳定，开始计算小范围的温度场，温度场的计算在六个周期后达到稳定。

The size of tested field was measured using comparison between the tested field image caught through CCD and the plotting paper image when plotting paper was placed in the tested field position with no plasma jet; the emission intensity distribution of tested field was obtained using stepping motor taking fiber probe to scan tested field, and the spectrum analysis instrument was used to show the spectrum intensity information.

通过CCD获得的待测场图像与没有射流射出时在待测场处放置的坐标纸图像进行比对，测量了实际待测场的大小；利用步进电机带动光纤探针对待测场进行扫描，通过光谱仪获得了待测场的光强分布。

Then for an artificial given solenoidal vector field, the problem how to construct another solenoidal vector field to make its curl equal with the given field was discussed.

作为它的逆问题，对于任意给定的一个标量场和一个无散向量场，求解另一个向量场，使该向量场的散度和旋度分别等于两个给定场的问题，只有在适定的边界条件下才能得到确定的解。

Third, The author analyzed the shimming method of the existing magnet system and programmed it. Because the base field homogeneity of the open magnet is worse and only passive shimming is available, it is necessary to study more effective shimming algorithm. The ordinary shimming method is based on the disintegration of the magnetic field using spherical harmonics. It is so tedious that involved in large scaled non-linear equations.

再次，详细分析了现有磁体系统的匀场方法，并通过编程运算，发现在开放型磁体这一特殊情况下，由于基场均匀度差和只能使用水磁材料垫补进行匀场等原因，基于对磁场分布用球谐函数分解并消去球谐函数高次项的常规匀场方法在实现上相当繁琐，牵涉到大型非线性方程组的求解，所以必须采用更有效的匀场算法。

The simulative model of temperature field and stress field in concrete , Heat and moisture coupling、Parallel simulative calculation of concrete with water pipe cooling、 Parallel feedback analysis of thermal characteristic parameters, and stress intensity factor of induced joint, which are the sixty-four-dollar questions, are studied in this dissertation. The main contents of this dissertation are as follows:(1)Based on the past and current research work, the calculation theory of the transient temperature field and creep stress field of mass concrete which self temperature influence is considered is deduced. The couple effect between the temperature field and humidity field of concrete, is considered on the basis of conservation law of water and energy, and the coupled formulation which coefficient is not constant of the heat and moisture in concrete is deduced. The calculation theory and model which is theoretically strict for solution to thermal problem in concrete with water-cooling pipes are recommended.

本文主要针对混凝土的温度场应力场仿真计算模型、热湿耦合、水管冷却问题的并行仿真、混凝土温度参数并行反演分析以及诱导缝应力强度因子计算等混凝土大坝温度应力数值仿真的关键技术进行了较为深入的研究，全文主要内容如下：(1)在现有研究基础上，推导了考虑自身温度影响的混凝土非稳定温度场和徐变应力场的计算理论；基于水分质量守恒和能量守恒原理考虑混凝土温度场和湿度场的耦合作用，推导了混凝土的变系数热湿耦合方程，并建立了相应的计算模型；引用严密的水管冷却混凝土温度场的计算理论和计算模型，比较了两种简化计算方法用于水管冷却混凝土仿真计算的不足。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。