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No sound muffler chamber is a reflection of the room, a good acoustic Fitted performance muffler chamber wall material, noise can be absorbed , can test the performance of the transducer in the absence of interference, so that the effective acoustic measured.
Research on the Fundamental Theory and Key Technologies of Audio Directional System [PhD].
Journal of Audio Engineering Society(1999)

The control system model of gantry crane for preventing swing Kongde He Zifan Fang Dalin Zhu Weihua Yang Mechanic and Material College, China Three Gorges University, Yichang, China ,443002 E-mail: hekongde@ctgu.edu.cn Keywords: Gantry Crane; Preventing Swing; LQR; Control System Abstract.
The key was to select the matrix Q, usually the catercorner number of matrix was constant, of catercorner denote the degree of , the most important , we hope it more least, accordingly its coefficient must be selected bigger.
Control Engineering Practice 15 (2007).825–837 [2] Xiang Cheng.

Hydrodynamics in the Luanhe River alluvial fan of the piedmont plain zone, China Qiaona Guo1,a, Zhifang Zhou1,b 1School of Earth Sciences and Engineering, Hohai University, No.1 Xikang Road, Nanjing 210098, P.
The surface material is fine sand.
The calibration was done manually until a model was found that had a minimum number of parameter zones and reasonable parameter values that capture the key features of the system.

Better interactivity: thematic teaching website platform should have good interactivity, and if a website is a passive medium, which only has the graphic display and rigid material, it will not be able to stimulate the students' enthusiasm for scientific research. 2.
Firstly, the collection of key resources and timely upload and real-time update is important.
(College of information and electrical engineering, China Agricultural University) Chinese Agricultural Science Bulletin 2011,27 (01): 466-470

Small Wind Turbine Rotor Design Breda Kegl1,a and Stanislav Pehan1,b* 1 University of Maribor, Faculty of Mechanical Engineering, Maribor, Slovenia abreda.kegl@um.si, bstanislav.pehan@um.si Keywords: wind turbine, wind blades, design procedure.
The sketch with all these key components is presented on the Fig. 1.
3 and 4 represent few design characteristic about the blade. 250 33o 27o 27o 33o 33o 70 Blade flange Airfoil No. 1 Chord of Airfoil No. 1 Chord of Airfoil No. 1 Airfoil No. 18 Generator shaft axis Main hub f 600 200 Fig. 2 Position of the blade flange regards to the two characteristically blade airfoils Half of the blade – below Epoxy resin Carbon fiber fabric Mold for making the below half of the blade Carbon fiber fabric Half of the blade – upper Composite: Glass fiber/ epoxy Composite: Glass fiber/ epoxy Fig. 3 Philosophy of making and merging two halves of blade Expanded epoxy foam Merged blade Stresses from the mold Joint made from carbon fiber fabric and epoxy resin Stresses from expanded epoxy foam Joint made from carbon fiber fabric and epoxy resin Fig. 4 Philosophy of using expanded epoxy foam to fulfill the interior of blade For a small scale production of blades a glass fiber reinforced polymers are proven material

Controllable Synthesis of Single-Crystal Monolayer Graphene on Copper Foils by Low-Pressure Chemical Vapor Deposition Lei Guo1,a, Xuekang Chen1,b , Lanxi Wang1, Shengzhu Cao1, Xiaohang Bai1, Chao Zhang1, Yongmin He2, Hui Gao2 1 Science and Technology on Surface Engineering Laboratory, Lanzhou Institute of Physics, P.
Introduction：Graphene, a two-dimensional honeycomb lattice of sp2 bonded carbon atoms, has attracted worldwide interest due to its excellent transport properties that make it a promising material for next-generation nanoelectronics[1-4].
The low nucleation density of graphene on Cu foils is the key for SCG growth.

Wang 1 1 School of Mechanical and Electrical Engineering, Harbin Institute of Technology, China a mejhj@hit.edu.cn Keywords: Error compensation, Kinematic error, NC program Abstract.
Table 2 Machining condition of finish milling Cutter � 16 ball-end carbide milling cutter Work-piece material LY12(Al2024) Coolant on Machining allowance 0.5mm Tool path Helix isometry Table 3 Comparison of dimension and sphericity of with and without compensation Designed radius [mm] Radius [mm] Sphericity [mm] Without compensation 38.0615 0.4659 With compensation 38.000 37.9708 0.2611 start Read next NC block Set origin of workpice and reference point of error measurement Draw coordinate and translate into machine coordinate Discretization and calculate movement vector Have Key word X,Y and Z?

Pre-combustion CO2 Capture Using Ceramic Absorbent And Methane Steam Reforming Masahiro Kato 1, a , Yukishige Maezawa 1, b , Shin Takeda 1, c , Yoshikazu Hagiwara 2, d , Ryosuke Kogo 2, e , Katsumi Semba 3, f , and Mitsutoshi Hamamura 3, g 1 Corporate Research & Development Center, Toshiba Corporation, 1 Komukai-Toshiba-cho, Saiwai-ku, Kawasaki, Japan 2 Toshiba Mitsubishi-Electric Industrial Systems Corporation, 3-13-16 Mita, Minato-ku, Tokyo, Japan 3 Technology Research & Development Center, Toyo Engineering Corporation, 8-1, Akanehama 2-chome, Narashino-shi, Chiba, Japan a shonan.kato@toshiba.co.jp, b yukishige.maezawa@toshiba.co.jp, c shin.takeda@toshiba.co.jp d hagiwara.yoshikazu@tmeic.co.jp, e ryosuke.kogo@tmeic.co.jp, f semba@ga.toyo-eng.co.jp, g hama@ga.toyo-eng.co.jp Keywords: CO2, capture, absorbent, pre-combustion Abstract.
This CO2 production cost means the cost needed for 1 kg-CO2, considering material cost, utility cost, and plant cost.
Acknowledgment This work was supported by the New Energy and Industrial Technology Development Organization (NEDO), Ministry of Economy, Japan as a key technology research project.

Numerical Simulation of the Heat and Mass Transfer in a Sodium Sulfur Cell LI Zhi Gang1, a, HUAI Xiu Lan1,b, TANG Da Wei1,c, WEN Zhao Yin2,d and DONG Zhao Yi3,e 1Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China 2Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China 3Beijing Longyuan Cooling Technology Co.
Introduction Sodium sulfur battery is one of the most promising candidates developed for energy storage applications, such as the load-leveling systems for electric power plants, the electric vehicle propulsion, and the large-scale energy storage for intermittent energy sources such as solar energy, wind energy, etc. due to its many advantages, such as high energy density, negligible self-discharge rate, low material cost and easy maintenance [1-7].
KGCX2-YW-399), the National Key Basic Research Program (973 Program) (No.

Bouc-Wen Model Parameter Identification for Piezoelectric Actuator Using Chaos Particle Swarm Optimization Chun-Xia Cai 1,2,a , Xiang-Dong Liu 1,2,b , Dong-Ning 1,2,c and Hong-Juan Li1,2,d 1 Key Laboratory for Intelligent Control & Decision of Complex Systems, Beijing Institute of Technology, Beijing100081, China 2 School of Automation, Beijing Institute of Technology, Beijing100081, China a caichunxia@bit.edu.cn, bxdliu@bit.edu.cn, c dongning@bit.edu.cn, d lihongjuanyb@163.com Keywords: Parameter identification, Bouc-Wen model, piezoelectric actuator, chaos particle swarm optimization.
Saadeh, Modeling of Hysteresis and Backlash for a Smart Fin with a Piezoelectric Actuator, Journal of Intelligent Material Systems and Structures, vol. 22, pp.1161-1176, 2011
Wen, Method for random vibration of hysteretic systems, ASCE Journal of the Engineering Mechanics Division, vol. 102, no. 2, pp. 249-203, 1976