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Dielectric Properties Investigation of Mg-doped Barium Titanate Ceramics Rike Chen1, a, Haitao Zhang1, Di Chen1, Xinzheng Wu1, Guoqing Zhang1 and Xiangyun Deng1,2,b 1Key Laboratory of Ministry of Education for Application Technology of Chemical Materials in Hainan Superior Resources, Hainan Provincial Key Laboratory of Research on Utilization of Si-Zr-Ti Resources, Materials and Chemical Engineering Institute, Hainan University, Haikou, 570228, China 2College of Physics and Electronic Information, Tianjin Normal University, Tianjin, 300387, China acrk_01@126.com, bxiangyundtj@126.com Keywords: Barium titanate ferroelectric ceramics, Mg-doped, Dielectric properties.
However, the resistivity of BT material is 2 at room temperature, that's to say, its conductivity is relatively high [16], it's no doubt that the value of increased dramatically at lower frequency.
The deviation behavior may be due to omitting conductivity of BT materials.
Acknowledgement This work was supported by the 863 project under Grant No. 2007AA03Z524, and the National Natural Science Foundation of China (NSFC) under Grant No. 50872094, and Hainan University Research Fund.
Buscaglia: Journal of Optoelectronics and Advanced Materials Vol.8 (2006), p. 944 [8] L.

Studies on the Environmental Impact of the HVAC Equipments Based on the LCA Theory Yue Ren1,2,a, Yue Zhao 2,b 1Tianjin University, School of Environmental Science and Engineering, TianJin CHINA 2TianJin Polytechnic University, School of Mechanical Engineering, TianJin CHINA arebecccarengyue@126.com, b747900258@qq.com Keywords: LCA; HVAC Equipment; Environmental Impact Abstract.We chose an endpoint damage model and combined it with ecological index method to obtain the life cycle assessment model of HVAC equipment.
HVAC equipments require energy and material in different life cycle stages, including production, transportation, installation, operation and waste treatment, meanwhile discharge pollutant into nature.
（1） （2） （3） （4） （5） Where, HH is human health damage load value, DALY; ED is ecosystem damage load value, PDF﹒m2﹒yr; RE is resource consumption amount（iron）, kg; EE is energy consumption amount（raw coal）, kg; mij and mik are matter contribution to human health and ecosystem damage, kg; βij and γik are unit material damage characteristic factors of various types to human health and ecosystem damage; m is material species; n is types of damage to human health; Gi is amount of materials i, kg; Rij is the resource consumption quality of the j natural per unit mass of the materials i, kg/kg; λj is scarce factor for natural resources j; Ei is energy consumption of I, kg raw coal; αi is energy quality coefficient of I(Crude oil 0.46,Natural gas 0.52); αcoal is energy quality coefficient of coal,0.35; EL is comprehensive environmental load of goods，pt; BRE，BEE，BHH and BED are standard reference values
[J].Applied Mechanics and Materials,2012,193-194:93~101
Environment Journal,2004,22(4):519~522

Effect of MCM-41 and SBA-15 Mesoporous Molecular Sieves on Properties of PMMA-based Composite Na Wang1, 2, a, Jiao Wang1, b, Jing Zhang1, c, Chi Ma1, 2, d and Erfan Chen1, 2, e 1School of Material Science and Engineering, Shenyang University of Chemical Technology, Liaoning Shenyang, 110142 2Education Department of Liaoning Province, Key Laboratory of Applied Technology of Polymer Materials, Shenyang University of Chemical Technology, Liaoning Shenyang, 110142  aiamwangna@sina.com, bwwjj100200@126.com, czhangjing7902@163.com, dlg_365@163.com, ecef5566@163.com Keywords: PMMA; Organic-montmorillonite; MCM-41; SBA-15; Nano-composite Abstract.
In the literature, combining two nano-materials with different shapes and sizes may generate more effectively enhanced effect due to the expected synergistic effect [11].
Experimental Sections Main Material.
Methyl methacrylate (MMA, ≥ 99.5 %), Tianjin Kermel Chemical Reagent Co., Ltd ; Benzoyl peroxide (BPO), Shenyang Dongxing Reagent Factory; Mesoporous molecular sieves MCM - 41 (without template) and SBA - 15 (without template), preparation by our laboratory [15~16], the properties of them are listed in Table 1; Organic montmorillonite, Zhejiang Fenghong New Material Co., Ltd.
Zhang: Chinese Journal of Materials Reserch Vol. 19 (2005), p. 94 [10] N.

It still has positive affect on enlightening the architect in original design, local condition design, rural material design.
There are two ways to achieve ecological adaptability, which are local conditions and local materials.
The design practice should be guided by the theory that can circumvent weaknesses and point out a right development direction in support of advanced science and technology.
The designer tries to make it simple and easy, simple to build and easy to get the material in the geographical expression of the design.
Secondly, to improve humid heat environment surrounding the envelope structures of the building and to enhance the insulation performance of the wall, roof and the thermal performance of the windows, the designer uses perforated bricks plus external insulations in the wall, extruded boards plus tiles on the roof, plastic steels plus hollow glasses in the windows for better thermal insulation; Thirdly, taking advantage of ecological materials, the use of reproducible and recycled materials could reduce the damaging effects on the nature; Fourthly, stairwell, hallway, toilet and other auxiliary rooms are arranged on the north of main rooms like bedrooms and living rooms as a buffer space.

Design of Bulk Solid Flow Control System Zhaolong Fan1, a, Jianhui Zhao1, b, Fan Li 1,c and Sun Rong2,d 1School of Instrument Science and Optical-Electronics Engineering, Beihang University, Beijing 100191, China 2Quality and technical supervision and Testing Center, Luoyang, 471000, Henan Province acoolfzl2008@163.com,bzhaojianhui@buaa.edu.cn,clifan@buaa.edu.cn,d34410119@qq.com Keywords: C8051F020, PID, Digital filter, Modbus Abstract.
When the impulse bulk solid flow controller is working, the material falls to the impacting plate freely from the discharge outlet of hopper, the sensor connected with the impacting plate feels the impulsion of material on the impacting plate, and the model is built in allusion to the force situation of impacting plate [3], as shown in Figure 1.
Actually, is very small generally, the falling time of material is very short, so we can ignore air resistance in this process to obtain the complete formula: （1） In the formula (1): G—weight flowed by the material in unit time; g—acceleration of free falling body; l —length flowed by the material on the impacting plate; —average speed flowed by the material on the impacting plate; and f—coefficient of friction.
Journal of TAIYUAN University of Technology.2009, 40(2):143-145
Soot mass flow measurement system using triboelectricity and ultrasonic [J] Advanced Materials Research.2012, 433-440

The increase of hardness and other improvements of the Ti6Al4V alloy surface allow wider applicability of this material in several industrial areas, in particular, biocompatibility applications.
The nanoindentation test permits to observe the existence of a surface layer more resistant than the bulk material in the specimens submitted to IIIP process.
Raveh, Materials of r.f. plasma nitriding of Ti6Al4V alloy.
Materials Science and Engineering, 167. (1993) 155
Journal of Materials and Processing, 6 (1998)3

Effects of the Processing Parameters on the Forming Quality of Stainless Steel Parts by Selective Laser Melting Qingsong Wei a, Xiao Zhao b, Li Wang, Ruidi Li, Jie Liu, Yusheng Shi State Key lab of Materials Processing and Die&Mould technology, Huazhong University of Science and Technology, Wuhan, China 430074 awqs_xn@163.com,bzhaoxiao200711@163.com Keywords: Selective Laser Melting; Rapid Prototyping; Stainless Steel; Molten Pool Abstract.
Materials and methods Equipment and Principle.
Test Materials and Experiments.
The SLM process uses 316L stainless steel powders(400 mesh) as test material.
[11] Weihui Wu and Yongqiang Yang : Journal of Mechanical Engineering In Chinese Vol.43 (2007),p.175-180.

. – 20130, India 3Advance Ceramics Materials National Physical Laboratory, Delhi-110012.
Satellites in space, face severe thermal vacuum radiation threats in the long run which degrades many properties of their fabricated materials, especially those of outer most surface which face the maximum exposure.
Cross linked materials improve the long term performance.
Experimental Details Materials.
The absorption of light energy by polymeric materials in UV and visible regions involves transition of electrons in s, p and n- orbitals from the ground state to the higher energy states.

Materials and Methods Tissue Preparation Different bovine mammary tissues were collected from the 8 Holstein Friesian cows at the slaughterhouse and were fixed with neutralized 10% (vol/vol) formalin immediately.
Science 267, 1645-1648
Journal of Poultry Science 44 (4): 433-438
Journal of animal science.
New York: Nova Science Publishers; 2005. p. 47–76

Journal of hainan university science edition, 1997, 26 (3). 35-37 [5] YangQing, YiGuoNa, Sue glorious, HuJianXiang.
Journal of southwest forestry university, 2003, (4). 30-34 [6] DengWuJun, palm plants in the garden of the application of the landscape [J].
Tropical agricultural science, 2009, 29 (6). 61-63 [10] TianYingCui.
Jiangsu: science and technology press, 2010:113
J hunan forestry science and technology, 2005 (3). 58-59