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Feature extraction of the small leakage diagnosis of oil pipeline based on acoustic signal Zhao Jiang a, Shang Mengb and Tian Jingc School of Electrical Engineering, Hebei University of Science and Technology, Shijiazhuang, China,050000 akdzhaojiang@163.com, bsmsl120@126.com , ctianjing_0312@163.com Keywords: pipeline leakage; acoustic signal; feature extraction; Fault diagnosis; wavelet transform Abstract: This paper introduces the related theory of sound waves , we collect the data through the acoustic wave sensors of the pipeline fault diagnosis system platform, decompose the signals to five layers by Mallat algorithm and wavelet function db4, compare the normal waves and leakage acoustic signal spectrum, and then get the power spectrum estimation for the decomposed signal at each level, we can see the signal’s energy feature in different frequency band.
[3]Yu Kaiping, Yang Bingyuan.

Repeated Impact Resistance of Cr-Mo Surface Alloying Layers on Ti6Al4V Alloy Lin Qin a, Kunkun Yang, Shuai Wang, and Bin Tang b Research Institute of Surface Engineering, Taiyuan University of Technology, Taiyuan 030024, China aqinlin@tyut.edu.cn, btangbin@tyut.edu.cn Keywords: Ti6Al4V, Cr-Mo Alloying Layer, Intermetallics, Hardness, Impact Resistance.
[2] Qin Lin, Li Zhe, Ma Lianjun, Tian Linhai, Liu Daoxin and Tang Bin: Rare Metal Mat.
[6] Qin Lin, Li Zhe, Ma Lianjun, Tian Linhai, Liu Daoxin and Tang Bin: Rare Metal Mat.

Tian Xiaohua [15] studied the influence of steel slag-phosphoric acid system on the setting time and mechanical strength of phosphorous based building gypsum.
Yang, X.Y.
Tian, Y.

Tian: Mater.
Yang, C.
Yang and Y.
Yang, Q.L.
Yang, Y.

Two-Step Green Hydrothermal Synthesis of ZnO powders Ling Liu1,a, Tian Xi Wang2,b, Yong Cai Zhang1,c,* and Ming Zhang1,d 1College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China 2School of Chemistry and Chemical Engineering, Henan Institute of Science and Technology, Xinxiang 453003, China a20414150@qq.com, btianxiwang07@sohu.com, czhangyc@yzu.edu.cn, dlxyzhangm@yzu.edu.cn Keywords: Zinc oxide; Nanostructures; Hydrothermal; Green synthesis Abstract.
Yang and G.P.

References [1] Tan Tian-you, Liang Feng-zhen.
[4] Xie Tian-shan.
[6] Fang Wei, Yang Guo-rong, Ren Bing.

Tian et.al [5] presented the dimensionless empirical equations and graph expressions of three flexure hinges, and investigated the influences of geometric errors on the performance of the flexure hinges.
[2] Zubir M, Shirinzadeh B, Tian YL.
[3] Tian Y, Shirinzadeh B, Zhang D.
[4] Tian Y, Liu X, Zhang D, Chetwynd DG.
[5] Tian Y, Shirinzadeh B, Zhang D, Zhong Y.

Analysis on stability of Dongchuan Landslide and the comprehensive management measure Jiangtao Xia 1, a, Chengzhong Yang 2,b and Shufang Wang3,c 1 Faculty of Architecture and Civil Engineering, Huaiyin Institute of Technology, Huai’an 223001, China 2School of civil engineering, East China Jiaotong University, Nanchang, 330013, China 3School of civil engineering e, East China Jiaotong University, Nanchang, 330013, China axjthygxy@sina.com, bycz0791@sina.com, cwsf0791@sina.com Keywords: Landslide; Stability analysis; Anchor pile; Monitoring; Management Abstract.
References [1]Chengzhong Yang,Wenjie Wan.Finite element on high embankment of widened road[J].Applied Mechanics and Materials Vols.63-64(2011)pp770-774 [2]Chengzhong YANG, Xinrong LIU ,Shufang WANG .Nonlinear Finite Element Analysis of High Rockfill Embankment on Steep Slope under Dead Loads[C].The 4th International Symposium on Lifetime Engineering of Civil Infrastructure, 2009,906-911 [3]Chengzhong YANG, Xinrong LIU,Shufang WANG .Seismic Response Analysis of High Embankment [C].
The 4th International Symposium on Lifetime Engineering of Civil Infrastructure, 2009,942-947 [4]Cheng-Zhong YANG.
The 4th International Symposium on Lifetime Engineering of Civil Infrastructure, 2009,961-966 [5]YANG Chengzhong, TAO Xiaomin.HE Guoxian.
[7]Tian Jinggui,Fan Caoyuan.The Principle an d Design of Retaining Piles with Prest ressing Cables.Journal of Chongqing Jiaotong Institute,1998,17(4):59~64

[2] Hongli Wang; Yitai Ma; Jingrui Tian; Minxia Li.
[4] Jun Lan Yang, Yi Tai Ma, Sheng Chun Liu.

Yang and S.
Yang., K.H.
Tian, L.
Yang, S.S.