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Research on Permeability of Coal Samples with and without The Effect of Supercritical CO2 YANG Tao1,a NIE Bais-heng1,b,YANG Dong 2,b ,Zhang Ruming1,b 1School of Resource and Safety Engineering, China University of Mining & Technology(Beijing), Beijing, China 2Institue of Mining Technology, Tai Yuan University of Technology, Tai Yuan, Shan Xi ae-mail:ytao0723@163.com, be-mail:277358891@qq.com Keywords:Coal sample; supercritical CO2; permeability; variation Abstract.To improve the low-permeability coal seam gas drainage and gas prevention and to seek the methods to improve the permeability of low-permeability coal, the experimental study on supercritical CO2 on coal was conducted in the laboratory conditions, and the experiment on pseudo-triaxial permeability testing for coal samples, with and without supercritical CO2, was conducted.
The processed coal samples were placed in CO2 resistant rubber cover after they were sealed by sealing material.
Acknowledgment Fund support: National key basic research and development plans(‘973’plans) Fund number:2011CB201202.

LED Visible Light Communication System Design and Performance Optimization Based on Ethernet Songjian Bao (College of Electronic and Electrical Engineering Chongqing University of Arts and Sciences, Yongchuan Chongqing 402160, China) bsj126@126.com Keywords: visible light communication; Ethernet; Tailing phenomenon; broadband access Abstract.
LED light source model [4] as shown in Fig. 7, in the figure, RS is LED material resistance, Cd is equivalent junction capacitance, Id is LED current.
Sharpening circuit in parallel in the LED light source at both ends, the key element of the circuit is large inductance LP and resistance RP, capacitance CB provide to segregate DC, LED not be short circuit.

Combined Cyclic-Static Bending Effect on the Encapsulation Properties of a Barrier Thin Film for Flexible Organic Optoelectronic Devices Dinh-Phuc Tran1,a, Chih-Kuang Lin1,b*, and Bao-Dong To2,c 1Department of Mechanical Engineering, National Central University Jhong-Li District, Tao-Yuan City 32001, Taiwan 2Department of Physics, National Chung Cheng University, Min-Hsiung, Chia-Yi 62102, Taiwan atrandinhphuc1508@gmail.com, bt330014@cc.ncu.edu.tw, cbaodonghnue@gmail.com Keywords: Cyclic-static bending; Barrier thin film; Water vapor transmission rate Abstract.
Kapnopoulos, Key factors to improve the efficiency of roll-to-roll printed organic photovoltaics, Org.
Lewis, Material challenge for flexible organic devices, Mater.

Design of wireless sensor system for agricultural Micro environment based on WiFi SHI Yun-bo1,a, SHI Ye-ping1,b, XIU De-bin1,WANG Xuan1, WANG Meng- meng1 and WANG Rong-xin1 1Institute of Measurement-Control Tech & Communications Engineering, Harbin University of Science and Technology, The Higher Educational Key Laboratory for Measuring & Control Technology and Instrumentations of Heilongjiang Province, Harbin 150080, China ashiyunbo@126.com, bxxsypxx@yahoo.com.cn Keywords: Agricultural microenvironment; Monitoring system; Wireless Sensor Network; The WiFi module Abstract.
The system temperature sensor is the platinum resistance with the graduation of Pt1000; the humidity capacitance which used for humidity measurement is polyimide material; MG811 type carbon dioxide sensor using solid electrolyte, it makes little effects on temperature and humidity and has good sensitivity and selectivity.

Introduction ZnO is very important material for short wavelengths electronic and optoelectronic devices due to its amazing properties of wide band gap of 3.37 eV and exciton binding energy of 60 meV at room temperature [1].
Mahmood, Adnan Ali, M A Hasam: Key Engineering Research Vol. 510-511 (2012), p. 265-270 [6] Card Hc, Rodrick EH: J.

Some key dynamic properties of driving motor – stiffness, inertia, damping – have to be included into mathematical computing model of the gearing set.
Yhang, Dynamics in the Gear Train set in Wind Turbine, Material Science Forum, 697 (2012) 701-705 [2] P.
Engineering Mechanics 2015, Svratka, (2015), 246-247 [6] M.

Aggregation Condition And Prediction Of Favorable Area For Xujiahe Formation Shale Gas In Guangyuan Tenement Blank Area Gang Shi 1, 2,a,Jinchuan Zhang 1,Bo Li 3Xuan Tang1 ,Wenzheng Jin1, Xiaorui Du1, Chong Liu1 Yunfeng Zhao1 1School of Energy Resources, China University of Geosciences(BeiJing) 100083, China 2Key Laboratory of Tectonics and Petroleum Resources（China University of Geosciences ）,Ministry of Education, Wuhan 430074, China 3China Huadian Engineering co.LTD ashgangsun@163.com Key words: Shale Gas; Xujiahe Formation; Guangyuan Area; Favorable Area Abstract: The Guangyuan area is located in the northern section of the Longmenshan fault zone, with strong tectonic activity, complex and changeable strata, low level of exploration and complex development status of shale.
Generally speaking, Triassic organic matter is of high abundance, with material foundation for hydrocarbon. 2).

Sudarshan1, e 1 Department of Electrical Engineering, University of South Carolina, Columbia SC 29208, USA 2 Department of Chemistry and biochemistry, University of South Carolina, Columbia SC 29208, USA a shrivast@engr.sc.edu, bmuzykovp@engr.sc.edu, cpearman@mail.chem.sc.edu d angel@mail.chem.sc.edu, esudarsha@engr.sc.edu Keywords: Triangular defects, inverted pyramids, CVD, 4° off-cut, KOH etching, Raman Abstract.
Lately, attention has shifted from 8° off-axis to 4° off-axis epitaxial growth owing to advantages of saving material, cost as well as the lower density of basal plane dislocations (BPDs) propagating from substrate to epilayer in 4° substrates [2-3].
[3] J.A.Powell, P.G.Neudeck, A.J.Trunek, G.M.Beheim, L.G.Matus, R.W.Homan Jr., L.J.Keys: Apply.Phys.Lett.

Thermal conductivity measurement for carbon-nanotube suspensions with 3ω method Gensheng Wu1, a , Juekuan Yang2, Shulin Ge 3 , Yujuan Wang4, Minhua Chen5 , Yunfei Chen6, b 1-6 School of mechanical engineering, Southeast University, Nanjing 210096, People's Republic of China 6 Key Laboratory of MEMS of China Educational Ministry, Southeast University, Nanjing 210096, People's Republic of China a kinson155@163.com, byunfeichen@seu.edu.cn Keywords: Nanofluids, Humic aid, 3ω method, Carbon nanotubes suspension Abstract.
The coefficientβis usually estimated as 0.01. kparticle is the thermal conductivity of nanoparticles. 0 75 0 75 1 nano nano particle bulk nano nano . d / l k k . d / l = + (4) where kbulk, dnano, lnano are the thermal conductivity of bulk material, characteristic length of nanoparticles, and mean free path of heat carriers in nanoparticles, respectively.

Research on dynamic alignment for sophisticated system based on ACP technology WAN Fei1,a, LI Guo-xi1,b, GONG Jing-zhong1,c，, WU Bao-zhong1,d (School of Mechatronics Engineering & Automation， National University of Defense Technology，Changsha 410073，China) feifeiwenqing123@163.com, lgx2020@sina.com, jzgong@nudt.edu.cn, wubaozhong@vip.163.com Key words: ACP; dynamic alignment; parameters mapping; computational experiment; Abstract: To change the status of time-consuming and over-reliance on technicians in mechanical system alignment process, the ACP technology is presented.
This paper attempts to establish the mapping relationship① through contact theory, exploring theoretical formula such as preload (), gap (), surface quality (), material properties () and stiffness (), damping () in order to establish agent model of various components.