参数

The dynamic phasor model of three-phase distribution parameter lines is also developed in this dissertation.

通过对算例的仿真，并与电磁暂态模型仿真结果的比较，验证了动态相量模型能突破传输时间常数对分布参数线路仿真步长的限制，用来仿真三相分布参数线路上的电磁暂态过程。

According to the characteristics of rock, the material parameters described wirh Weibull distributive law are assigned to the finite elements of the structure by using Monte Carlo simulation method.

根据岩体介质的材料特性，应用蒙特卡洛模拟方法将符合韦泊分布规律的材料参数赋给结构中的各个单元体中去，从而把材料参数随机赋值方法引入到非匀质类材料的弹塑性破裂过程分析中去。

We use the Taylor series expansion method to get the second-order approximate expression of the confidence region of the parameters, and then according to the principle of minimizing the volume of the confidence region, this paper carries out experimental design for the regression model, and then fixes the point range in the domain of definition of design variable for the model function so as to select the designing point, which can minimize the volume of the confidence region.

文章首先计算指数族非线性模型的回归参数β在1-α置信水平下的置信域的体积，为了便于计算，需把置信域投影到切空间中去，投影后的置信域是一个椭球体，用Taylor展开方法对此椭球体的体积进行二阶近似，推出原参数置信域的体积的近似表达式，然后对回归模型进行试验设计，根据置信域体积最小准则，在模型函数的设计变量的定义域上确定点列，选取使置信域体积达到最小的设计点。

Experimental results show that with increasing proton fluence,the S-parameter of the Doppler broadening spectrum gradually decreases,and the W-parameter increases.

研究结果表明，随质子辐照注量的增加，多普勒展宽谱的S参数逐渐减小，W参数逐渐增大。

Since most of the large molecules containing phosphorus element have double bonds, it is necessary to consider the special structures of double bonds in order to deal with these large systems more accurately. So, based on density functional theory and electronegativity equalization principle, applying a general atom-bond electronegativity equalization method , using separated program, through regression and least-squares optimization , the parameters of atoms and bonds in molecules are determined . By these parameters , the charge distributions and the energy of some molecules containing phosphorus element, especial the fragment of DNA, RNA, are calculated . The results are quite good.

由于这些含磷生物大分子体系都含有双键，为了明确的处理双键，进而更准确的解释带有双键和共轭双键的含磷生物大分子结构与性质的关系，我们以密度泛函理论~([1-4])和电负性均衡原理~([5-9])为基础，应用和开发原子-键电负性均衡方法中的σπ模型，利用最小二乘法，拟合确定了一些分子（含碳、氮、氧、氢以及磷等原子）的各种类型原子及化学键区域的参数，并利用上述参数计算了一些多聚核苷酸的电荷分布以及分子的总能量，进行了讨论，得到的结果可以和从头算相媲美。

Plenty of samples is provided for training BP neural network by traditional design method and the topology structure is built using forward propagating data and backward propagating error data, which is applied to optimal design of parallel double broken line pulley in order to accomplish the mapping between main parameter of hoisting mechanism of gantry crane and the related parameters of parallel double broken line pulley.

利用传统的设计方法为BP神经网络的学习提供足够样本集，然后通过正向传播和误差反向传播建立BP神经网络的拓扑结构，并将其应用于平行双折线卷筒的智能设计中，以完成龙门起重机起升机构主要设计参数与平行双折线卷筒相关参数的映射，提高设计的质量和效率，为龙门起重机关键零部件的智能设计提供一个新的途径。

This paper introduced an eigen-mode decomposing method to decouple zero sequence parameter in double circuit. The decomposing matrix of eigen-mode component is given. The zero sequence component relationship between voltages or currents at two terminals of double circuit was achieved by composing eigen-mode components.

提出一种采用特征模量分解方法对同杆多回线间的零序参数解耦，并给出了同杆双回线零序参数特征模量分解矩阵，通过特征模量分解得到同杆双回线路两端之间的零序电量关系。

This article, by use of experimental testing, studied and analyzed the relationship of the fabric structure parameters and mechanical properties against the fabric drape.

文章利用实验测试的方法对织物的结构参数和机械性能进行研究，分析织物结构参数和机械性能与悬垂性之间的关系。

Under the condition of running on the hard soil pavement with the total train mass, the riding comfort tests of the tractor-trailer combinations with the stiff and the flexible drawgear have been performed, and the dynamics longitudinal force has been studied. When the flexible drawgear was used, the theoretical results and the experimental data showed that the peak value of the dynamics longitudinal force, the peak value of the RMS of the dynamics longitudinal force, and the PSD both of the dynamics longitudinal force and of the longitudinal acceleration decreased largely.

以平稳随机路面激励状况下满载行驶作为挂接车辆的经常行驶工况，进行了挂接车辆以刚性牵引架及不同柔性牵引参数的柔性牵引装置牵引运行时的平顺性试验，柔性牵引理论分析结果与试验结果均表明，使用柔性牵引参数值接近优化值的柔性牵引装置后，动态纵向牵引力的峰值、功率谱密度峰值及均方根值均有了大幅度的降低；主车和挂车的纵向振动加速度功率谱峰值也有了很大的降低。

Each program consists of the following three modules: The first one is the program of managing and driving the dialog box, which can adjust the input parameters of the dialog box; The second one is the calculating program, which can calculate the coordinates of the points in the unfolding drawing. The parameters used in the second module are obtained from the first module. The third module is drawing module.

每一段绘图程序都由三个模块构成，第一模块为对话框管理和驱动程序并对对话框输入的参数进行回调；第二模块为计算程序，利用上面回调所得到的参数，再根据上面得出的计算公式，计算展开图上各点坐标；第三模块为绘图模块。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。