分布参数

The results showed that the fractal dimension of wood cell lumen distribution could he as an important parameter to characterize the porosity of wood.

结果表明：腔径分布分形维数的大小可以作为表征木材多孔性的一个参数。

In this text, we discuss the method of estimating parameter that the density of explains variable of having measurement error is not abridge, we inquire the covariance of y and e^ and we can get a formula as follows

本文要探讨的是在不限制有测量误差的解释变数的分布下估计参数的方法，首先探讨Y跟e^的共变异数关系，可以得到如下式子

The advantage of CFD numerical simulation especially displays in the development of the new products, it not only can replace theroutine experiment and offer various kinds of flow characteristic parameters by a large margin , It not only can replace conventional experimental substantially provide various flow parameters, and reveals through three-dimensional flow field pattern to optimize design based on detailed. CFD numerical simulation in this text applications will greatly enhance the cage control valve design and the technical level and product quality, reducing cage control valve design and processing cycle, significant cost savings, And optimizes through the flow channel, to reduce fluid flow through the valve of energy loss, improving efficiency in the use of energy have the extremely vital significance.

CFD数值模拟的优势尤其表现在新产品的研制开发中，它不但能大幅度取代常规实验提供各种流动特性参数，而且能通过揭示流场三维分布形态为优化设计提供详细依据；文中所采用CFD方法必将大大提高套筒型调节阀设计的技术含量与产品质量，可缩短调节阀的设计和加工周期，节省大量成本，并且通过流道优化，对降低流体流过调节阀的能量损失，提高能源利用率等具有十分重要的意义。

Wavelet packet decomposition; statistical characteristic analysis; normal distribution; mechanical vibration; trolley track

工程科技II，工业通用技术及设备，声学工程小波包分解；特征参数；正态分布；机械振动；岸桥小车轨道

Based on the traffic volume of the surveyed section, the TransCAD software was used to estimate actual OD matrix, which was further used to reckon trip production calibrated by the parameters of gravity model. Then, the simplified combined program of distribution-assignment was used to forecast the section traffic volume. The trip production of the project was obtained by trip rate method. The section traffic volume produced by the project for the next year was obtained by mode classification and traffic assignment.

根据调查路段交通量，利用TransCAD软件反推现状出行OD矩阵，再根据反推的OD矩阵标定重力模型参数推算出各小区出行产生量；然后利用简化的出行分布和交通分配的组合程序，得到预测的未来年路段过境交通量；应用出行率法得到项目交通产生量，通过方式划分、交通分配，可得到未来年由项目产生的路段交通量。

A general program using APDL(ANSYS parametric design language),which is applicable to arbitrary lining sections of the three-centered circular arch with different surrounding rock pressure distributions,was developed for the calc.

利用ANSYS的参数化高级设计语言，编制了适合任意三心圆拱衬砌断面和不同围岩压力分布形式的隧道衬砌内力和偏心距的通用计算程序。

Based on the preliminary study on LSF, this paper studied characteristics of laser shock forming in detail, analyzed primary factors which affect the deformation of sheet metal, measured distribution of residual stress in deformed sheet metal, and simulated the process of laser shock forming.

本文在激光冲击成形初步研究的基础上，系统研究了激光冲击下板料的变形特性、影响板料变形大小的主要因素、变形区残余应力的分布，最后利用有限元分析软件对激光冲击成形过程进行了模拟，对相关理论参数进行了修正。

The key technologies of Grid Method including grid divided in basin, impact radius of rainfall and number of reference rainfall stations have been discussed with example. The parameters of Grid Method have been selected through trial and error. Using simple random sampling to simulate the failure to collect rainfall, the relation between surface rainfall calculation error and station density, station distribution, uneven spatial distribution of rainfall has been sought.

论文探讨了流域网格剖分、降雨影响半径、搜索半径范围和参证站数量等关键技术，研究了网格法参数的优选，并采用简单随机抽样模拟降雨缺测情况，给出了面雨量计算误差与流域站网密度、均匀度、降雨分布不均匀性指标的关系。

The roller is the important components of this design, and it's size is directly related to snow-clearing efficiency. The size and the distribution arrangement of the blades are strictly requested, because they can guarantee snow efficient, and similarly also affects the organization stability.

磙子是此次设计的重要部件，其大小直接关系到清雪的效率，而其上刀片的尺寸、分布排列严格的要求，因为这些是保证清雪效果的重要参数，同样也影响到机构的稳定性。

In the rotor winding ventilation system with sub-slot, the configuration parameters of sub slot, the distribution of winding's cooling ducts, and the diameter of slot wedge directly affect the flow characteristics of coolant in cooling ducts.

在转子副槽通风冷却系统中，副槽结构、径向风道分布、槽楔出风口直径等参数，直接影响转子风道冷却介质流动特性。

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。