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Introduction ECC are on the basis of fracture mechanics and micro-mechanics, design, adjust and optimize the material system sysmatically in order to form a cement-based composite material.
(a1) (a1) (b2) (b2) (c3) (c3) (d4) (d4) Fig. 4 The curve of within Fig. 5 The curve of within the different crack depth the different crack depth Fig. 6 Relationship between CMOD/CTOD and the crack-depth Acknowledge This work was financially supported by the national natural science foundation of China(51108151);Civil engineering materials of jiangsu province key laboratory open fund project, the national key basic research development program (973 program) funded project (2009cb623203) ;Hebei province natural science foundation of China (E2012202097) References [1] Hillerborg A.
Materials and Structures, 1985, 18: 291- 296
RILEM, Materials and Structures, 1985,18( 106) : 285- 290
Journal of Materials in Civil Engineer ing, 2001,13( 6): 399- 406

Williams, On the stress distribution at the base of a stationary crack, Journal of Applied Mechanics, ASME. 24 (1957) 109-114
[3] J.Qian, Y.Q, Long, Sub region mixed FEM for calculating stress intensity factor of anti-plane notch in Bi-material, Computational Structural Mechanics and Applications. 8(3) (1991) 325-330.
Wen, The determination of the stress intensity factors by the displacement discontinuity method, Shanghai Journal of Mechanics. 13(2) (1992) 33-40.
Tsang, Mode III two-Dimensional crack problem by two-level finite element method, International Journal of Fracture. 102(3) (2000) 245-258
Science Press, Bei Jing, 1993.

Numerical Simulation of The Flow and Heat Transfer of Fractal Tree-like Minichannel Heat Exchanger Sun Jian,Huang Zhangfeng,Zhang Renping School of Material Science and Engineering,Jingdezhen Ceramic Institute,Jingdezhen,China ajian933@163.com Keywords: Tree-like minichannel; heat transfer;fluid flow Abstract.
Introduction Higher efficiency of sustainable energy has become an indispensable to the low carbon economy.With the development of science and technology, people gradually recognize the characteristics of the micrometer and nanometer heat exchangers.I n 1981,Tuckerman and Pease[1] were the first person who come up with micro-channel heat exchanger.In 1985,Swife,etc.[2] invented a cross flow micro-channel heat exchanger which maximized heat transfer from a liquid (water-glycol) to a gas(air).Traditional small size channels can result in great pressure drop and uneven distribution of the temperature, which may decrease the working performance of the equipmeng when the exchanger applied to cooling the electronic parts of the device.
[2]Gregory Swift,Alber Migliori and John Wheatley:Micro-channel crossflow fluid heat exchanger and method for its fabrication.Journal of Heat Recovery Systems,45:2643-2648(2002)
International Journal of Heat and Mass Transfer, 45 (13):2643-2648(2002)
M. and Poulikakos:Laminar mixing, heat transfer and pressure drop in tree-like microchannel nets  and their application for thermal management in polymer electrolyte fuel cells.Journal of Power Sources, 130(1):178-191.

The applications of robots, from handling material in manufacturing to planetary exploring and energy developing, show that mobile robots are advancing along with the development and progress of mankind [1].
The tracking error for stable system Acknowledgment It is a project supported by Natural Science Foundation of office of education, He Nan Province (2011B470005) and Natural Science Foundation of He Nan Province (112102210339).
Journal of Robotic Systems,2005,22:111-121 [3] Pu Shi, Yiwen Zhao, Yujie Cui.
Journal of Control Theory and Applications, 2007,5(2):pp.189-193 [10] Kang M K, Lee J S, Han K L.
Kinematic path-tracking of mobile robot using iterative learning control, Journal of Robotic Systems,2005,22(2),111-121 [11] Man Z H, Paplinski A P, Wu H R.

In this paper, the initial bolt-up force is 110KN, the form of bolt, flange and gasket are studs, welding neck flange and flexible graphite composite gasket, the material of bolt, flange and gasket are 25Cr2MoVA,15CrMo and 304, the specifications of bolt, flange and gasket are M20, NSP6.Class300 and DN150 respectively.
Acknowledgements This work was financially supported by the National Natural Science Foundation of China (51305310), Hubei Provincial Department of Education Science and Technology Research Program (Q20131506), Graduate Education Innovation Foundation of Wuhan Institute of Technology (CX2015019).
Journal of Pressure Vessels and Piping.1995, 117
Creep Analysis of Bolted Flange Joints International Journal of Pressure[J].
International Journal of Pressure Vessels and Piping, 2007.(185-194)

It is one of the key issues considering material plasticity and different loading cases for hysteretic strain.
Acknowledgment This research is supported by National Science foundation of PRC (51073125).
Journal of Harbin Institute of Technology, Vol. 41, pp.123-127, (2009) (in Chinese)
Journal of Water Resource and Architectural Engineering, Vol. 4, pp.30-31,36, (2006) (in Chinese)
Journal of Wuhan University of Technology, Vol. 34, pp.1-4, (2012) (in Chinese)

Introduction The ZnO is one of the most versatile materials, since it has high stability, non-toxicity and safe to use.
Journal of nanoscience and nanotechnology, (2005) 1561-1573
Journal of physics: condensed matter, 195503, (2012)
Journal of Inorganic and Organometallic Polymers and Materials, 28(5), 1739-1752, (2018)
Journal of Engineering and Applied Sciences, 11(12), 7633-7637(2016).

., Tomsk, 634050, Russia, 2 Institute of strength physics and material sciences SB RAS 634021, Tomsk, Russia Akademicheskii pr., 2/4 asvp@ispms.tsc.ru, brosmc@ispms.tsc.ru, cpanzerturm@mail.ru, dteerawat_gt@hotmail.com, elira1951@mail.ru Keywords: ultrahigh molecular weight polyethylene, block-copolymer, polypropylene, LLDPE, wear resistance, permolecular structure.
Carbon Nanofibre-Reinforced Ultrahigh Molecular Weiht Polyethylene for Tribological Applications, Journal of Applied Polymer Science. 104 (2007), 4173-4181
Improvement of the Tribological Behavior of Ultra-High-Molecular-Weight Polyethylene by Incorporation of Poly (Phenyl p-Hydroxyzoate), Journal of Applied Polymer Science. 96 (2005), 2336-2343
Surface Characterization of ion-implanted Polyethylene, J. of Polymer Science: Part B.
Mechanical and tribotechnical properties of chemically modified UHMWPE, Journal of friction and wear. 32, No.3 (2011) (32), P. 30-35

DIMENSIONNING AND SIMULATION OF A PILOT PLANT FOR SOLAR HYDROGEN PRODUCTION KERBOUA ZIARI YASMINA1, a, ZIANI LOTFI2,b and BENZAOUI AHMED3,c 1 Université des Sciences et Technologies Houari Boumediene, faculté de physique LTSE ,BP 32, El Alia 16111 Bab-Ezzouar , Algiers, Algeria 2 CDER Route de l’observatoire , BOUZEREAH 3 Université des Sciences et Technologies Houari Boumediene, faculté de physique LTSE ,BP 32, El Alia 16111 Bab-Ezzouar , Algiers, Algeria a yasminaziari@yahoo.fr, blotfi.ziani@gmail.com, c abenzaoui@mail.com Keywords: Hydrogen, Solar, Hydrogen Production, Electrolysis, Photovoltaic Panel, Simulation Abstract.
Introduction Nowadays, the world's energy is produced at 74% from fossil fuels (oil, coal and gas), 20% from renewables (hydro, biomass, solar and wind) and 6% from nuclear materials [1].
[2] DeSoto, W., Klein, SA and Beckman, WA, (2005) "Improvement and Validation of a Model for PV Array Performance," Solar Energy Journal, [3] Emmanuel I.
"Potential of renewable hydrogen production for energy supply in Hong Kong", International Journal of Hydrogen Energy. 2006

The assessment index system is obtained by investigating some teachers of our college and using the hierarchy analysis(Table 1) Table 1: Teacher’s Teaching Quality Assessment Index System First class indexes Variable name Second class indexes Variable name Teaching content accurate concept, complete system, emphasizing key points Properly handling materials, linking theory with practice, full contents, strong logic Each coherent teaching link, the reasonable effective use Teaching method To teach students in accordance with their aptitude, inspire the students' positive thinking, explain the profound in simple terms, interact with students Accurate and refining language, neat and normative writing on the blackboard The content of multimedia courseware is refined vivid, informative Teaching attitude Teaching plan is in accordance with the teaching syllabus and normative, full preparation before class Teaching and educating people, being a model for others, teaching
Journal of Higher Education, 2011 , 32 (1) : 100- 103
Higher Education of Sciences, 2002, ( 5 ): 34- 36
Journal of Inner Mongolia University of Technology: Social Science Edition,2010,（19）：111-116