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In this paper, the sorting of wear, the mechanics of wear particle formed and the characteristics of wear particles are introduced, and morphology characteristics parameter of wear particle are determined, which is particle brim digital feature. Based on image characters, after pre-process, section and extracting of contour parameter of wear particle using image process technique, four shape character parameters are extracted by fourier series expansion. After analyzing fundamental principle and shortcomings of neural network, current BP algorithm is improved in output optimization, network linearization implication optimization and adding momentum, and then astringe speed of BP algorithm.

本文介绍了磨损的分类以及磨粒的生成机理、磨粒的形态特征，应用摩擦学系统分析的观点，确定磨粒边缘数字特征为磨粒的识别特征参数；根据磨粒图像的特征，利用计算机图像处理技术对磨粒图像进行预处理、分割、轮廓参数的提取，采用傅立叶级数展开式提取磨粒四个形状特征参数：圆形度、散射度、凹度、细长度；针对 BP(Back-Propagation)神经网络收敛速度慢的特点，对现行的 BP 算法进行改进，并通过实验验证改进后的网络收敛速度快；研究设计了磨粒图像采集系统；利用 BP 算法建立磨损磨粒自动识别算法模型 AWPRM(Auto Wear Particle Recognition Model)。

The back of the neck .a handle attachable by two bolts.

一个可用两个螺栓附上去的把手。

The one ex-boyfriend suspected Wang Mei-Brasenia young man some of its exposure of private photos, which is not only the first sex bed photo, there are two of a beach vacation in Shanghai, swimsuit photos, Wang Mei-pertusa dressed in a red bikini, half-naked upper body, tease young men, while men wiping sunscreen to help his body and kissing touching Wang Mei Brasenia hip and the back of a bold move especially violent staggering.

这次一名疑为王美莼前男友的年轻男子将其部分私密照片曝光，其中不但有床第性爱照，还有两人在上海某沙滩度假的泳装照，王美莼身着红色比基尼，半裸上身，挑逗年轻男子，而男子则帮其全身抹防晒霜，并亲吻抚摸王美莼臀部及背部，动作大胆出格，令人瞠目结舌。

The hairs on the back of his neck bristled.

他脖子后面的头发都竖了起来。

He extolled their niceness, snapping them as they basked companionably on warm mud or on a favourite bank of long grass, the forefoot of one embracing the back of another.

他称颂鳄鱼的漂亮，当鳄鱼们在暖和的烂泥中懒洋洋地晒太阳，或在舒适的长草坡上，一只鳄鱼的前足趴在另一只鳄鱼的背上时，他拍摄它们。

Moving Zhong Zou demandingly to spend each market zone time when me , a child follows at the back of me all the time .

当我吃力地搬着钟走过一个个街区时，有一个小孩一直跟在我后面。

He would wake up stiff and damp, with sand in his teeth and dew dotting the hair at the back of his neck.

他会醒来僵硬和潮湿，沙子在他的牙齿和露水四处头发在后面的脖子。

About one month later and after some injuries, Gila has found the back of the net once again.

一个月之后，经历了伤病，吉拉用进球宣告他回来了。

They were on a tight budget, so I charged them my nonprofit rate, says Harmel, who works out of a cozy but crowded office in the back of the house he shares with his wife and stepson.

不过眼下，它还只是一个缺钱少粮的新机构。&他们的预算很紧张，所以我开出了针对非营利机构的价码&，马克说道。

They were on a tight budget, so I charged them my nonprofit rate, says Harmel, who works out of a cozy but crowded office in the back of the house he shares with his wife and stepson.

不过眼下，它还只是一个缺钱少粮的新机构。&他们的预算很紧张，所以我开出的价码根本就不赚钱，&马克说道。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。