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Fault Diagnosis for the Oil System of Aviation Piston Engine Based on BP Neural Network Yan Feng (Aviation Engineering Institute，Civil Aviation Flight University of China，Sichuan guanghan,618307,China) yfcafuc@aliyun.com Key words:aviation piston engine;fault diagnosis;oil system;BP neural network Abstract.
Constructed the BP neural network.Symbols of failure modes were inputs of the BP neural network,and symbols of failure causes were outputs of the BP neural network.Builded a mapping relationship between failure modes and failure causes by training samples studying.Four training samples were selected based on common faults and fault effects.A given mode was as a input of the network,and by adjusting connection weights and the threshold of every neuron,an ideal result could be gotten.Then other mode was as a input of the network which carried on studying until the epochs was 369,and the mean squared error fast converged and the value of mean squared error was.The failure causes for the given failure mode can be confirmed by this BP neural network.By engineering verification, the BP neural network is applicable to fault diagnosis for oil system of aviation piston engine. 1.Instruciton The oil system of aviation piston engine includes the oil filter,oil cooler,oil separator, oil filler cap
0.0034 0.0028 0.0015 0.0025 0.0018 0.0002 0.0029 0.0028 0.0019 0.0030 0.0019 0.0044 0.0038 0.0004 0.0039 0.0042 0.0026 0.0020 0.0038 0.0016 0.0033 0.0040 0.0026 0.0039 0.0038 0.0037 0.0038 0.9955 0.9957 0.9949 0.9952 0.9977 0.9952 0.0045 0.0046 0.0044 0.0024 0.0036 0.0038 0.0045 0.0002 0.0026 0.0047 0.0043 0.0043 0.0001 0.0039 0.0030 0.0042 0.0032 0.0037 0.0037 0.0030 0.0008 0.0012 0.0033 0.0035 0.0036 0.0037 0.0039 0.0036 0.0039 0.9956 0.9956 0.9958 0.9973 0.9960 0.9969 0.9955 4.Summary As shown in the table 3, when the failure probability is 1 or limit value is 1,it belongs to this fault. when the failure probability is 0 or limit value is 0,it doesn’t belong to this fault.Different with traditional information processing methods,the artificial BP neural network is with adaptive,trained, self- modifying ,parallel processing and parallel reasoning capabilities and faster than traditional information processing methods.By engineering
This paper is supported by Civil Aviation Flight University of China Youth Foundation under grant Q2013-038.
[5]Kailash C.Kapur,Michael Pecht,Reliability Engineering, John Wiley & Sons,New Jersey ,2014

Characteristics and Applications of the AAm-Grafting PE Liang-Hsign Chou1,a, Maw-Tien Lee2*,b 1.Department of Civil and Water Resource Engineering, National Chiayi University, Chiayi City, Taiwan 600 2.Department of Applied Chemistry, National Chiayi University, Chiayi City, Taiwan 600.Corresponding author: mtlee@mail.ncyu.edu.tw Keyword: Contact angle, grafting, PE, AFM Abstract.
Many studies focused on using waste plastics as civil materials [1-3].

Jiangxi Key Laboratory of Surface Engineering, Jiangxi Science and Technology Normal University, Nanchang 330013, China; 2.
Students in this stage can be roughly divided into three categories, involving preparing for the postgraduate entrance examination, preparing for the civil service exam and preparing for employment.
As for the students who are preparing for the civil service exam, the method to deal with the difficulties and the ability of cooperating with others in class may be the points they should learn, which are propitious to the oral quiz. 2.3 Assessing segment Teachers are confused of the assessment of the professional election course all the time, small paper and simple open exam are the commonly used forms, but it seems that they are not the effective ones.

China a sbzhao@ncwu.edu.cn, b jzgckk@sohu.com Keywords: bridge engineering; hollow slab; pretensioned prestressed high-strength concrete (PPHC); construction; quality evaluation.
Combined with the application of high-performance concrete in bridge engineering, the construction technics of pretensioned prestressed high-strength concrete (PPHC) hollow slabs with new section is summarized.
As engineering experience, this paper summerizes the construction technics of PPHC hollow slabs, and statistically analyzed the concrete strengths of the two bridges.
Li: China Civil Engineering Journal, No.4, (2002), p6-11.
(in Chinese) [7] JTG F80/1-2004: Quality Inspection and Evaluation Standard for Highway Engineering (China Communication Press, Beijing, 2004).

Effect of Physical and Chemical Surface Treatment on the Thermal Stability of Hemp Fibers as Reinforcement in Composite Structures Na Lu1,a, ,Shubhashini Mysore Bhogaiah2,b 1Dept. of Engineering Technology and Construction Management, Sustainable Material and Renewable Technology (SMART) Laboratory, University of North Carolina at Charlotte, NC, 28223, USA. 2Dept. of Civil and Environmental Engineering, Sustainable Material and Renewable Technology (SMART) Laboratory, University of North Carolina at Charlotte, NC, 28223, USA.
Introduction Over the past two decades natural fiber composites are re-emerging as alternatives to synthetic fiber reinforced composites in automotive, building and civil engineering applications, due to their unique material properties, including low cost, low density, non-abrasiveness, desirable mechanical and acoustical properties, and non-splintering performance[4].
Therefore, hemp fiber is often used as reinforcing component in composite to engineer high strength but light weight structures.
Pickering, Engineering and evaluation of hemp fibre reinforced polypropylene composites: Fibre treatment and matrix modification.

Wankhade2,b 1Professor, Department of Civil Engineering, Indian Institute of Technology Bombay, Mumbai, Maharashtra, India-400076.
Tel.: +91-22-2572-7332; fax: +91-22-2572-7302. 2,Research Scholar, Department of Civil Engineering, Indian Institute of Technology Bombay, Mumbai, Maharashtra, India-400076.
Introduction Smart material systems and structures have been adopted by engineering and research community over the last two decades.
The need of light weight structures in engineering applications has led to the gradual replacement of many isotropic materials with composites which provide both high stiffness and low weight.
Gu: Evolutionary piezoelectric actuators design optimization for static shape control of smart plates, Computer Methods in Applied Mechanics and Engineering, Vol. 197 p. 47–60 (2007)

Interface Shear Stress of Concrete Beams Strengthened with FRP in Salt Water Chen Zhao 1, a, Peiyan Huang1，and Zhongsong Chen 1 1 School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, China a zhaochen@scut.edu.cn Keywords: shear stress; FRP; reinforced concrete beam; interface; salt water Abstract: Based on existing methods and results of other research, the bond-slip relationship model is given and the distrubition of shear stress of concrete beam strengthened by FRP in salt water is derived.
Introduction Since fiber reinforced polymer (or fiber reinforced plastic, FRP) excels in mechanical properties, high corrosion resistance and constructional convenience, bonding FRP to the concrete structures has been a method widely used to increase the load-carrying capacity in civil engineering.
Since in practical engineering, FRP reinforcement components are in a certain working environment, all aspects of its performance will always be subject to a variety of adverse environmental impact.
Application of FRP beams strengthened in offshore and coastal engineering, so the study of interface performance of salt water effect on beam strengthened by FRP has great engineering significance.

Research on Reinforced Concrete Column under High Speed Impact of Different Diameter Projectile Fei Gao1,a, Junlin Tao2,b 1 College of civil engineering, Southwest University of Science and Technology, Mianyang, SIChuan, China 2 College of civil engineering, Southwest University of Science and Technology, Mianyang, SiChuan, China agaofeiorange@qq.com, bjunlintao@126.com Keywords: High Speed; Impact; Numerical Simulation; Reinforced Concrete; Project Abstract.
International Journal of Impact Engineering[C].2003:479-497 [3] X.W.
Oblique and normal perforation of concrete targets By a rigid projectile[A].International Journal of Impact Engineering[C].2004:617-637 [4] Wenqian Wan, Yuan Long and Xiaobing Yue.
Journal of Structure Engineering, 1990, 116(4)：1061~1079 [9] Xutao Wu, Yao Li and Heping Li.

Combined Shape and Topology Optimization of Free Form Shells Lei Wang a, Qilin Zhang and Bin Yang Department of Building Engineering, Tongji University, Shanghai, China aemail: wleispace@gmail.com Keywords: Free Form; Shape; Topology; Optimization; NURBS Abstract: With the aim of finding the optimum design that maximizes the stiffness of shell structures, an suitable approach for combined shape and topology optimization of free-form surface is presented.
Acknowledgment This study is supported by Kwang-Hua Fund for college of civil engineering, Tongji University.
[2] Cui Chang-yu, Yan Hui, “A morphosis technique for curved-surface structures of arbitrary geometries—Height adjusting method and its engineering application,” China Civil Engineering Journal, Vol. 39, No. 12, 2006, pp. 1-6
Kaveh, B.Hassani, S.Shojaee, S.M.Tavakkoli, “Structural topology optimization using ant colony methodology,” Engineering Structures 30 (2008): 2559-2565.

Analysis Of Curved Girder Bridge Seismic Collision With Implicit Contact Algorithm Qiang Xu1, a, Xingjun Qi2, b 1School of Civil Engineering, Shandong Jianzhu University, Jinan 250101, China 2School of Civil Engineering, Shandong Jianzhu University, Jinan 250101, China aytLdqq@126.com, bqxj123@163.com Keywords: Seismic Collision Curved Continuous Girder Bridge Contact Pair Abstract: Aiming at the collision phenomenon of the curved continuous girder bridge under the earthquake, the three-dimensional finite element model is established considering the collision element between the abutment and the end beam.
Introduction The urban systems of overpass junctions and viaducts are the significant engineering of city transportion, in which the curved girder bridge is becoming more and more popular.
With more attentions paid to the disaster prevention and mitigation of the lifeline engineering, the aseismatic problem of the curved girder bridge was attached more importance [1].A great deal of evidences from the earthquake disaster show that pounding between girders may severely impair the safety of bridges such as the collapse of the girder.
(In Chinese) [3] JTJ 004-89, Specifications of Earthquake Resistant Design of Highway Engineering.