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Application of gap element method to wheel/rail contact problem based on V-5 Junjie Zhong1, a, Bing Wu1,b, Zefeng Wen1,c , Xin Zhao1,d, Xuesong Jin1,e 1State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, China ajjcristiano@yahoo.cn,bjiaoda-wubing@163.com,czfwen@home.swjtu.edu.cn dswjtuzhaoxin@163.com,exsjin@home.swjtu.edu.cn Keywords: wheel/rail; vector form intrinsic finite element; gap elements; contact problem Abstract: The vector form intrinsic finite element (V-5) method and the gap element method are combined to solve the static wheel/rail contact in two-dimensions in this paper to obtain the wheel/rail normal contact pressure, which would be compared with the normal contact pressure of ABAQUS and Hertz theory.
Hertz theory developed in 1882[1] is still widely used in many engineering fields.
Matrix B relates the element strains and nodal displacements; E denotes the matrix with material modulus. u* is the nodal deformation vector. fa* is the internal nodal force at time ta. f* is the incremental internal force in ta-t. ft* is the internal nodal force at time t.
Elastic material model is used with a density of 7800 kg/m3, the elastic modulus of 210GPa, and the Poisson's ratio of 0.3.
Convected material frame and examples.

Design of an E-Learning Based on Service Software Bus Shanxiong Chen1, a and Maoling Pen 2,b 1College of Computer and Information Science Southwest University, Chongqing, China 2Chongqing City Management College, Chongqing, China acsxpml@163.com, bpmlchongqing@163.com Key words: service-oriented architecture; service software bus; E-Learning; overall design Abstract.
SSB is a basic infrastructure of component integration and a kind of architecture of software engineering construction.
It can organically integrate these materials to form rich, vivid, lively and more suitable for self-learning or classroom to support teaching, multimedia courseware.
Main functions of curriculum development system includes template editor, text editor, equation editor, material management, video editor, PPT conversion, part management, real-time preview, edit questions in JSP forms, user management, course management and authorization management

Enhanced Mechanical Performance of Electrospun Graphene/Polyacrylonitrile (PAN) Composite Microfibrous Yarns via Post-processing Yunyu Li1,a *, Lingjun Guo1,b, Bin Wang1c, Qiang Song1,d 1State Key Laboratory of Solidification Processing, Carbon/Carbon Composites Research Center, Northwestern Polytechnical University, 127 Youyi Road, Xi’an Shaanxi, 710072, PR China aemail: liyunyu@mail.nwpu.edu.cn, bemail: guolingjun@nwpu.edu.cn, cemail: wangbin_1120@mail.163.com, demail: plusring@mail.163.com Keywords: Graphene/PAN composite, Electrospun yarn, Mechanical performance, Post-processing Abstract.
With the development of nanoscience and technology, micro-/nanofibrous yarns based on different types of materials such as polymers, ceramic and composites have been applied with an increasing proportion in high value added applications like filtration media, gas separation, gas sensors, biomedical engineering and the precursor of carbon fibers [1,2].
Nuli, Polyacrylonitrile/graphene composite as a precursor to a sulfur-based cathode material for high-rate rechargeable Li-S batteries, Energy Environ.

ultra-high-rise-building water supply and drainage system design Yanan Si1，a,Ming Zhou2,b，Yuhang Liu3，Ling Deng4 1Kunming university of science and engineering institute of municipal engineering level 2011 graduate students，650500，China 2The dean of Kunming university of science and engineering institute of municipal engineering，650500，China 3Shenzhen deep water Consulting Ltd.，518000，China 4Shenzhen huayang international engineering design company，518038，China a1018838375@qq.com.
Key words: ultra-high-rise-building，water supply and drainage system，fire fighting system，middle water tank Abstract: With the rapid development of chinese economy,to speed up the modernation of the society more and more ultra-high-rise-building rise abruptly.This article as Liuhe square project in Shengzhen city an example,elaborated the water supply system, drainage system,and fire fighting system design in water supply and drainage system design.
Sewage System The highest daily displacement of this engineering is 1529 m3.
As a building drainage design staff, should be based on technical , security, economic principles , in practice, to innovation , to find the best drainage design programs to meet the new requirements of architectural design development to meet the continuous improvement of people's material cultural requirements, is to embark on the basis of sustainable development and protection.

Emulational calculation of concrete perfusion in steel-pipe arch rib of a large-span bridge Bai Ying-hua1,2 Liu Mu-yu1 Yu Tian-qing2 1 School of Civil Engineering and Architecture, Wuhan University of Technology, 430070，P.R.China 2 School of Civil Engineering and Architecture, Hubei University of Technology,430064, P.R.China 1 Author Information: Bai Ying-hua(1975--- ), male, Ph.D candidate in Major of the Bridge and Tunnel Engineering; Wuhan University of Technology, P.R.China; TEL：15327288971 E-mail: yhbai750608 @163.com Mailing address：School of Civil Engineering and Architecture, Hubei University of Technology, P.R.China, Postcode: 430064 Key words: Steel tube arch rib, Concrete perfusion, Emulational analysis Abstract: The bridge is a half-through steel-pipe concrete arch bridge with uniform catenary.
Table 1 Major parameters of the bridge Item Material Element Elastic modulus (MPa) Poisson ratio Density (kg/m3) Concrete C50 3D beam element 3.45×104 0.2 2400 Steel pipe 16Mn 3D beam element 2.06×105 0.3 7850 Inclined flank rod Steel tube Equivalent beam element 2.06×105 0.3 - Buckle cable Strand1860 Cable element 1.95×105 0.3 8005 Stiffening rod Q235 Thick plate element 2.06×105 0.3 7850 After the construction complete of major parts of the bridge, concrete can be poured.
Journal of Railway Science and Engineering, 2006(5):1~5
Highway Engineering, 2007,32(4):142~145

Most of the heterogeneous catalysts developed for the production of biodiesel are either alkaline oxide or alkaline earth metal oxide supported over a large surface area. 2.2 Materials for Biodiesel Production A critical aspect of biodiesel production is the careful selection of raw materials, as this choice significantly influences factors such as purity, cost, chemical composition, and conversion efficiency.
The basic raw materials for biodiesel production are vegetable oils, animal fats, and short-chain alcohols [11] & [12].
The materials used in this study include alcohol (CH3CH2OH), waste cooking oil, Calcium oxide (CaO), rice husk, coconut husk, chicken manure, hydrochloric acid, and distilled water.
Figure 3, shows the process summary of biodiesel production from materials preparation to biodiesel characterization.
Chizoo, “Synthesized activated rice husk ash as a heterogeneous catalyst for biodiesel production using waste cooking oil Synthesized activated rice husk ash as a heterogeneous catalyst for biodiesel production using waste cooking oil Chemical Engineering Departme,” no.

Process potentialities are detected in quality enhancing, formable shapes increasing and workable materials range enlarging.
Micro-spinnability and macro-spinnability are evaluated for the four combinations of materials and heat treatments.
Lubricant selection has impact on surface finishing of these materials.
Prakash, Estimation of Power in the Shear Spinning of Long Tubes in Hard-To-Work Materials, J.
Jolly et al., Analysis of Power and Forces in the Making of Long Tubes in Hard-to-Work Materials, Proc.W.Congr.Eng. 2 (2010)

An analysis on wellbore collapse of open hole completion in carbonate formation Xiangtong Yang 1,a, Zhiyuan Liu2,b, Hao Zhang1,c, Qiquan Xiong2,d, Hongtao Liu1,e 1Tarim Oilfield Company, Korla, Xinjiang, 841000, China 2State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China a yangxt-tlm@petrochina.com.cn, bworld2049@126.com, c zhangh-tlm@petrochina.com.cn, dxiong0491@163.com, eliuhongtao-tlm@petrochina.com.cn Keywords: Carbonate formation, Nature fracture, Wellbore stability, Testing pressure difference, Wellbore collapse.
In this paper, the influences of geology and engineering factors on wellbore stability have been analyzed.
This progress will cause a serial of complex physicochemical reactions between drilling mud and the cementing material in the nature fracture system.
We assume the formation is a kind of continuum material.
When drilling nature fractured formation or high structural stress formation, engineers should take special cares for wellbore stability problems

An Approach to Determine the Maximum Rate of Pressure Rise for Dust EXPLOSIONA Ma Qiu Jua, Zhang Qib, Chen Jia Chenc State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China amaqiuju@bit.edu.cn, bqizhang@bit.edu.cn, cchenjiachen199109@163.com Keywords: Dust explosion; Maximum rate of pressure rise; Computational method Abstract.
The Institution of Chemical Engineers (IchemE) reports that a dust explosion takes place every day in Europe.
Journal of Hazardous Materials 97(1–3), 1–9
Journal of Sichuan University (Engineering Science Edition), 41(6), 79–83.

Calculation of Cross-Laminated Timber Panels Using the Theory of Composite Rods and Rod Approximation AZIZOV Taliat1,a*, KOCHKAREV Dmytro2,b and MAISTRENKO Oksana3,c 1Pavlo Tychyna Uman State Pedagogical University, Sadova str. 2, Uman, Cherkassy region, Ukraine, 20300 2National University of Water and Environmental Engineering, Soborna str., 11, Rivne, Ukraine, 33028 3Odesa State Academy of Civil Engineering and Architecture, Didrikhsona str., 4, Odesa, Ukraine, 65029 a*taljat999@gmail.com, bd.v.kochkarev@nuwm.edu.ua., cmaystrenkoof@gmail.com Keywords: CLT panel, rolling shear, beam approximation, composite beams, timber structures, Fourier series Abstract.
In recent times, new materials have been developed, such as laminated veneer lumber and cross-laminated timber (CLT) panels.
For CLT panels, the shear flexibility of the transverse layers is a key factor addressed in Timoshenko beam theory, which incorporates shear deformations.
Determine the equivalent stiffnesses in two directions of a conditionally continuous beam from the known expression for the resistance of materials (under a uniform external load q):
Proceedings of the 8th World Conference on Timber Engineering (Lahti, Finland), (2004) 1001-1006