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Wang 1 1 School of Mechanical and Electrical Engineering, Harbin Engineering University, Harbin 150001,china 2 School of Mechanical and Electrical Engineering, Harbin Institute of Technology, Harbin 150001,china a guoxuwei@hrbeu.edu.cn Keywords: Parallel machine tool (PMT), Virtual prototype technology, Simulation, Screw theory Abstract.
Because of low efficiency and long periods, the conventional designing and manufacturing methods can not meet the requirements of PMT rapid development, meanwhile, bring great waste of manpower and material resources.
The key to realize administration is to build database in which topological structure, constraint relationships and code of each model are saved.

Simulation analysis and experimental research on circular piezoelectric bone-conduction headphone Zeng Ping1, Chen Yanhui13, Gao Yingying1, Li Yanpeng1, Cheng Guangming2 (1 College of Mechanical Science and Technology, Jilin University, Jilin Changchun 130022; 2 Institute of Presition Mechinery, Zhejiang Normal University, Zhejiang Jinhua 321004; 3 Changchun University of Science and Technology College of Optical and Electronical Information, Changchun 130012, China) Key words: piezoelectric bone conduction; natural frequency; amplitude-frequency characteristic; frequency-loudness characteristic Abstract: Based on the theory of bone conduction, a novel circular piezoelectric bone conduction hearing device with a new structure of leaf spring support and excellent low-frequency response is proposed in this paper.
However, considering the characteristics of the piezoelectric material itself, PBCH also has many deficiencies, which need to be solved urgently by researchers, such as small retractable strain, narrow band response, insufficient frequency response, etc.
[5] S.Noimanee,S.Wattanasirichaigoon.DEVELOPMENT OF VIBRATION INTERFACE TO SKIN EAR HEARING DEVICES USING PB(TI0.48ZR0.52)O3.The 3rd international Symposlum on Biomedical Engineering(ISBME 2008),387-390
Journal of Jilin University (Engineering and Technogy Edition) , 2010 , 34 (4) :1671-5494.
(in Chinese) [15] ZHANG Guofang,LIU Runsheng,YANG Bo,LIU Fogen.Research for Bone-Conduction Test of Profoundly Hearing Damaged Patients.Audio Engineering:Psychological and Physiological Acoustics,2013,37(1):39-41(50).

In the occurrence of arc discharges, spark discharges and corona discharges, SF6 would be reacted with little water, electrode and solid insulated material.
SF6 analysis is the key to maintenance [J].
High Voltage Engineering, 2008, 34 (8):664-669 (in Chinese) [8] Tang Ju, Li Tao, Wan Lingyun, Zhang Xiaoxing, Yao Yao.
High Voltage Engineering, 2008, 34 (4):1583-1588 (in Chinese) [9] Wang Yu, Li Zhi, Yao Weijian, Zhuang Xiansheng, Huang Chengji.
High Voltage Engineering, 2009, 35 (4): 823-828 (in Chinese) [10] Zhang Zhongqi, Lian Hongsong.

Anderson Electronic Materials Application Research Center Department of Ceramic Engineering University of Missouri-Rolla Rolla, MO 65401 Corresponding Author: Xiao-Dong Zhou Zhou@umr.edu303 MRC Key words: Microstructure; CeO2; grain size; conductivity; purity.
This gives the materials scientist an opportunity to alter the properties of a given oxide by substituting different cations or varying oxygen content.
The impurities can function as acceptor dopants (such as Ca or lanthanide elements) and/or blocking materials (such as Si); the impurities can be resulted from raw materials, processing of ceramics, thin films or bulk, as well as being induced during measurement (7).
They found that raw materials with 99.5% purity possessed a higher conductivity than those with 99.999% purity CeO2.
RESULTS AND DISCUSSION 3.1 Size and Temperature Dependence of Impedance Spectra In polycrystalline materials, electronic properties, particularly conductivity, are influenced by the grain boundaries.

In addition, the pipe materials have an impact on the leak discharge rate, which could not be the same for all materials.
The value of the leak exponent strongly varies depending on the type of leak and the pipe materials considered which one of this model’s key findings is.
N1 exponent for different pipe materials and leak geometry [8].
This model strongly depends on the pipe materials.
Different results have been recorded for different pipe materials.

Here we provide an introduction to bulk magnetic behaviors, describe several strategies adopted for controlling spin-spin organization, and expand on one of these strategies, crystal engineering.
All the materials were reagent grade and used without further purification.
Hatakeyama, Frequency dispersion of permeability in ferrite composite materials, J.
Hybrid organic-inorganic materials.
Poliakoff, “Reaction Engineering: The Supercritical Water Hydrothermal Synthesis of Nano-Particles, J.

Liang DAI 1, a, Biaolin PENG 2, b, Bigui WEI 1, c, Gui MA3,d 1School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou, China 2Department of Manufacturing and Materials, Cranfield University, Cranfield, Bedfordshire, MK43 0AL, United Kingdom 3School of Chemistry and Chemical Engineering, Ningxia teachers university, Guyuan, China adailiang818@126.com(corresponding author), bpengbl8@126.com, cweibg@mail.lzjtu.cn, dNXSFXYMG@163.com Keywords: Sewage Sludge; Heavy Metals; Wheat; Growth; Physiology Abstract.
Materials and methods The sewage sludge samples were collected from the An-ning District Wastewater Treatment Plant in Lanzhou, China.
Mohan, Effect of distillery sludge on seed germination and growth parameters of green gram (Phaseolus mungo L.), Journal of Hazardous Materials. 152 (2008) 431–439
Studies on land application of sewage sludge and its limiting factors, Journal of Hazardous Materials. 160 (2008) 554-558 [5] D.
Gao, et al, Key problems in municipal sludge composting and its industrialization process, China Water & Waste Water. 25(2009)104-108

Seetharaman1,c 1 Department of Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA 2 Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA a lanyin@andrew.cmu.edu, bbalajis@andrew.cmu.edu, csridhars@andrew.cmu.edu Keywords: hot shortness, oxidation, interface perturbation, Ni, Cu, ternary diffusion, modeling Abstract.
Since the feed materials of EAF are predominantly steel scrap, it inevitably contains an amount of copper in the range of 0.25 wt%-0.45 wt% [9] which are from waste cars, wirings and other electrical parts.
Nickel is the key element to suppress hot shortness and is always present in the steel scrap.
Experiment methodology Materials Fe, Fe-Cu and Fe-Cu-Ni alloys produced by the Materials Production Center at the Ames National Laboratory were used.

Li et al., "A New Response Surface Method for Structural Reliability Analysis", Advanced Materials Research, Vols. 712-715, pp. 1506-1509, 2013 [5] Z.
Pons, “Adaptive response surface method based on a double weighted regression technique,” Probabilistic Engineering Mechanics, vol. 24, no. 2, pp. 135-143, 2009
Sudret, “Global sensitivity analysis using polynomial chaos expansions,” Reliability Engineering & System Safety, vol. 93, no. 7, pp. 964-979, 2008
Liu et al., "Application of Kriging Surrogate Model in Performance Parameters Optimization of Excavator Cab Shock Absorbers", Applied Mechanics and Materials, Vol. 741, pp. 393-396, 2015 [23] Z.
Dhaene “A Kriging and Stochastic collocation ensemble for uncertainty quantification in engineering applications,” Engineering with Computers, vol, 33, no. 4, pp. 935-949, 2017

Pinczewski4 1Department of Petroleum Engineering, University of Benin, Benin City, Nigeria. 2,4School of Petroleum Engineering, University of New South Wales, NSW 2052, Sydney, Australia. 3Department of Applied Mathematics, Australian National University, Canberra, ACT 0200, Australia.
Advances in extracting representative networks from micro-CT images of porous materials have improved the predictive capabilities of network models [2,3].
Dake, Fundamentals of Reservoir Engineering, Elsevier Science B.V., New York, 2001
Averdunk, Techniques for image enhancement and segmentation of tomographic images of porous materials, Physica A 339(1-2) (2004) 166-172
Pirson, Oil Reservoir Engineering.