截面

Patients were NEVA normal in 30 vosculogenic ED patients and in 4 were NEVA abnormal 28 non-vasculogenic ED patients.

在非血管组、动脉组、静脉组中有统计学差异的NEVA参数为：每晚勃起次数、勃起持续时间、血容量改变、横截面改变。

Then, BAE Systems in funding from the Department of Defense launched the "European Nighthawk"Ⅰ/Ⅱ(Nightjar Ⅰ/Ⅱ) research project, located in the Wharton's radar cross-sectional area test test UCAV design a variety of radar scattering.

随后，BAE系统公司在国防部的资助下开展了"欧夜鹰"Ⅰ/Ⅱ（Nightjar Ⅰ/Ⅱ）研究项目，在其位于沃顿的雷达截面积试验场测试了多种UCAV外形设计的雷达散射特性。

A new method called generalized displacement method, using new structural model taking into account the deformation of the nodal point and avoiding the disadvantage of stiffened nodal point model, is proposed here to calculate the displacement and the stress in adjecent point of thin-walled structure.

一、薄壁杆件结构的计算模型对金属薄壁杆件组合结构用有限元法计算时，遇到的一个困难是不同截面形状的薄壁杆件在连接点处由翘曲引起的轴向位移不协调。

The modeling theories on dynamics of flexible multibody system are reviewed.In chapter 2, the geometric nonlinear relationship between strain and displacement is utilized in describing the nonlinear displacement field. The FEM discrete model of the arbitrary flexible beam in non-inertial frame is derived by the Kane's method.

第二章从几何非线性应变-位移关系描述非线性变形场，使用有限元方法离散三维任意截面柔性梁，用Kane方法对离散的模型建立动力学方程，并通过算例验证了算法的正确性和可行性。

The cross-section of the FGPM pipe is buckled in the mode of axisymmetric torsion because of nonhomogeneity. The thickness shear stress is observed in the mode of axisymmetric longitudinal wave.

对管而言，由于材料的非均匀分布导致在轴对称扭转波模态中出现了横截面翘曲现象，轴对称纵向波也出现厚度剪切应力。

In comparison of the two integral cross sections, it can be found that that the nonreactive process occurs more easily in lower collision energy.

通过反应性碰撞和非反应性碰撞积分截面的比较，发现在低能碰撞情况，非反应性碰撞更容易进行。

This paper studied the earnings managements of the listed companies by dividing the accrual into above-the-line accruals and below-the-line accruals. And for above-the-line accruals and below-the-line accruals of 2002, I divided above-the-line-accruals into working capital accruals and nonworking capital accruals. Then I used modified Jones model by adding industry variables to study the new characteristics of earnings management in 2002. This paper provides evidence that the listed companies still used below-the-line accruals as the main earnings management instrument. On the other hand the listed companies also used working capital accruals as one of their earnings management instruments. On the basis of the studies above, I build two proxies of the earnings management.

本文首先通过对2002年上市公司盈余管理的分项实证研究来观察各种制度实施后上市公司利用线下项目进行盈余管理是否得到了一定的遏制，实证过程中采用修正的横截面JONES模型加入行业变量并经过适当变形对上市公司年报线上项目和线下项目，并进一步将线上项目分解出营运资金相关项目和非相关项目两项进行盈余管理的实证研究，发现企业对线下项目的操纵仍然在企业盈余管理中占据主要地位，但从某种程度上看，线下利润的操纵得到了一定的抑制，另外企业对营运资金应计项目的盈余管理也是显著的。

Direct difference is sensitive to noisy data, so a threshold limitation is given, which can not only filter the result from noisy data but also pick edge points up according men's desire. On the other hand, artificial intelligence is used for segmentation in reverse engineering. Because the essence of segmentation is clustering similar characteristics and self-organizing feature mapping is one function of neural network, SOFM network is used for segmentation in the thesis, coordinates and normal of data points is took as the characteristics vector.

第二种方法，基于双向角度微分的边点提取法，针对三维正交模型采用基于截面线的方式组织数据，此方法比基于曲率半径方法更简洁，不用进行曲面拟合，大大提高了计算速度；计算过程中由数据点的直接差分逼近微分，但直接差分对数据误差敏感，为此，本文提出了阈值过滤的方法，一方面过滤了数据误差在计算结果中引起的噪音，另一方面可以按照设计意图控制边点的提取；来决定是否提取光滑交接的边点。

And then, according the FEM numerical simulation result, the coefficient value of the modified model is made sure. Moreover, the transform characteristic of section is analyzed, the dynamic change process of rolling-force, stress and strain is reappeared and the variety regulation is analyzed. Through the contrast the variety regulation between the simulation and the spot-line measurement, the conclusion that the datum are matched basically is obtained.

并且，分析了连轧无缝钢管截面的变形特点及轧制力和应力应变的变化规律，重现了轧制力和应力应变的动态变化过程，对比了有限元数值模拟的轧制力与现场实测的轧制力，得到了两者的变化规律基本相符的结论，证实了显式动力学有限元法作为连轧无缝钢管的研究方法的可行性。

The structural design and optimization method of the octagonal beam with step by step energy absorbing characteristics were introduced.

研究了一种八边形截面逐级吸能梁结构的设计与优化方法。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。