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Online since: October 2013
Authors: Hua Deng, Fei Gao
Set Point Force Control of Shape Memory Alloy Actuator Using Fuzzy Controller Fei Gao1,2, Hua Deng1,2,a 1The State Key Laboratory of High Performance and Complex Manufacturing, changsha 410083, China 2School of Mechanical and Electrical Engineering, Central South University, changsha 410083, China aHdeng@csu.edu.cn Keywords: Shape memory alloy, Fuzzy controller, Set point force control.
The ability of SMA actuators to “memorize” previous shape is the result of physical changes that take place in SMA materials.
When heating, martensite transforms into austenite, material recovers its previous shape.
When cooling, austenite transforms into martensite, under the action of bias force, material gets plastic deformation again.
Furthermore, thermocouple sensors can’t measure charged objects, so thermal greases are used as heat conduction and insulation material, which increase the response time.
Online since: August 2013
Authors: Kun Liu, Chuan Jie Fang, Zhi Qiang Li, Fang Fang Fan, Jian Jian Han
To date, the researches about PV for removing sulfur from gasoline are primarily based on patents which mainly come from Grace Davison Company, ExxonMobil Research and Engineering Company and Marathon Oil Company [9].
In the published articles, the results show either lower flux or selectivity and the membrane material mostly made of PDMS or PEG.
In this work, PEBAX2533 was chosen as a film material to prepare the homogenous film for removing thiophene from binary mixtures by means of pervaporation.
Structure of PEBAX Experimental Materials.
The phenomena can be explained by solubility parameter theory, as an important method to select polymer material for pervaporation processing, that characterize interactive intensity between film material with a separated component [24].
Online since: September 2013
Authors: Shu Qin Chen, Lei Zhang, Zhao Sheng Chu, She Rong Hu
Previous studies showed [3] that the concentration of bio-absorbable free ion in the interval water was the key indicator to assess the heavy-metal toxicity.
Since China’s reform and opening up, the intensive use of fertilizers, electroplating materials and other chemicals which contain many kinds of heavy metals increased the potential ecological risk of the lake in adjacent to the agricultural, industrial and residential region.
Materials and Methods 2.1.
Journal of Hazard Material,174(2010):455-462
[14] Tang Wen-zhong, Shan Bao-qing, Zhang Hong, et al.Heavy metal sources and associated risk in response to agricultural intensification in the estuarine sediments of Chaohu Lake Valley, East China.Journal of Hazardous Materials 176 (2010) 945–951
Online since: December 2018
Authors: Gang Zhao, Yi Ran Zhou, Ce Heng Duan, Lei Kang, Ni Tian
Control of Dispersolds in 7475 Aluminum Alloy Yiran Zhou1,2,a, Lei Kang1,b, Ceheng Duan1,c, Gang Zhao1,3,d*, Ni Tian1,3,e 1School of Materials Science & Engineering, Northeastern University (NEU) Wenhua Road 3-11, Heping District, Northeastern University,Shenyang 110819 China 2Institute of Advanced Material Technology, Northeastern University, Wenhua Road 3-11, Heping District, Northeastern University,Shenyang 110819 China 3Key Laboratory for Anisotropy and Texture of Materials, Northeastern University,Wenhua Road 3-11, Heping District, Northeastern University,Shenyang 110819 China azhouyr@mail.neu.edu.cn, bkangleiahut@126.com, c516873185@qq.com, dzhaog@mail.neu.edu.cn, etiann@atm.neu.edu.cn Keywords: dispersoids, 7475 aluminum alloy, homogenization, pre-treatment, Al18Mg3Cr2 phase Abstract. 7475 aluminium alloy is widely used in aerospace industry and military field.
Introduction 7××× series high strength aluminium alloy is widely used in aerospace as the light structure material[1].
Experimental Methods The experimental material is a semi-continuous casting ingot with the thickness of 300 mm.
Acknowledgements This work was financially supported by the National Key R&D Program of China (2016YFB0300801, 2016YFB1200506-12), the National Natural Science Foundation of China (51371045) China.
Online since: April 2020
Authors: Wei Li, Yu Han Yuan, Nasir Ilyas, Zhi Hui Qi, Dong Yang Li, Xiang Dong Jiang
Bi-Polar Synaptic Behavior of Pt/SiOx:Ag/TiOx/p++-Si Memristor Yuhan Yuan1,a, Nasir Ilyas1,b, Zhihui Qi2,c, Dongyang Li1,d, Xiangdong Jiang1,e, Wei Li1,f* 1School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China 2School of Management and Economics, University of Electronic Science and Technology of China, Chengdu 611731, China ayhyuan94@qq.com, bilyas_nasir84@yahoo.com, cQi_UESTC@outlook.com, dopen_please@163.com, exdjiang@uestc.edu.cn, fwli@uestc.edu.cn (*corresponding author) Keywords: SiOx:Ag/TiOx memristive layer; resistive switching; synaptic behavior Abstract.
In the past few years, a wide range of memristive devices using different materials including metal oxides (i.e., SiOx, ZnO2, WOx, TiO2 [6-8]) and chalcogenides (i.e., Cu2S, Ag2S [9,10]) have been investigated.
Besides the selection of memristive materials, one possible way to improve the switching performance and realization of analog switching is to insert different metal oxide layers in memristive devices, and each layer is assigned to satisfy a specific goal [13-15].
Material and Methods As shown in Fig. 1(b), our memristor was designed as Pt/SiOx:Ag/TiOx/p++-Si structure.
Besides potentiation and depression characteristics, short-term plasticity (STP), and long-term plasticity (LTP) are also key synaptic features in the memristive synapse.
Online since: October 2013
Authors: Yin Nan Yuan, Yong Bin Lai, Ling Ling Cai, Xiu Chen, Xin Qiao, Lei Chen
Modeling of Biodiesel Cold Filter Plugging Point from their Chemical Composition YongbinLaia, LinglingCai,Yinnan Yuan, Xiu Chen, Xing Qiao, Lei Chen School of Mechanical Engineering, Nantong University, Nantong,Jiangsu, 226019, China ayblai@163.com Key words: biodiesel,cold flow property, gas chromatograph-mass spectrometer Abstract.
Materials and Methods Materials.There are 120 types of biodiesel samples, among which have 13 types of herb biodiesels: 2 types of cottonseed methyl ester (CSME), maize methyl ester (MME), PNME, rapeseed methyl ester (RME), soybean oil methyl ester (SBME), and 1 type of rice bran oil methyl ester (RBME), sunflower oil methyl ester (SFME) and sesame oil methyl ester (SME); 9 types of woody plant biodiesels: 3 types of palm methyl ester (PME), and 1 types of camellia methyl ester (CME), CTME,jatrophacurcas methyl ester(JCME), pistaciachinensis methyl ester (PCME), rubber seed methyl ester (RSME) andtung methyl ester (TME); 3 types of waste oil biodiesels: hogwash oil methyl ester (HME), Kentucky fried oil methyl ester (KFME) and waste cooking oil methyl ester (WCME); 95 blended biodiesels.
Among 25 types of representative raw material biodiesel, the contents of SFAMEC≥20 in PNME1 and the content of SFAME in PME2 are 9.86 and 40.13 w%, which are high and the CFPPs reach up to 10℃, which are 13 and 10℃ respectively; the UFAME of SSME and RME2 are high, which are 88.62 and 87.46 w%, leading to the CFPPs decrease to -10℃, which are -14 and -9℃, thus, affecting the serviceable range and climate adaptability of biodiesel.
Fuel. 2012,93: 642-648 [6] MaríaJesús Ramos, Carmen MaríaFernández, Abraham Casas, Lourdes Rodríguez, Ángel Pérez.Influence of fatty acid composition of raw materials on biodiesel properties[J].
Online since: May 2011
Authors: Zong Cai Deng, Jian Hui Li, Ying Li
Flexural performance of corroded RC beams strengthened with hybrid fiber reinforced polymers JianHui Li1, a, Ying Li2,b, ZongCai Deng3,c 1 China Academy of Building Research, Beijing 100013, China 2 Beijing Triumph Building Materials Engineering Co., Ltd, Beijing 100024,China 3Beijing University of Technology, Beijing 100124, China alijh@emails.bjut.edu.cn, b li78y@sohu.com, cdengzc@bjut.edu.cn Key words: corrosion; RC beam; hybrid; fiber reinforced polymer; flexural performance Abstract: The research program is aimed at investigating the effectiveness of application of good ductile hybrid fiber reinforced polymer (FRP) to upgrade corroded RC beams.
Experimental Program Properties of materials The mechanical properties of FRP sheets and reinforcements used in this study are shown in Table1.
Description of test specimens The test program included 5 RC beams, each specimen was 2.30m long with a 120×200mm Table 1 Properties of materials FRP sheets Reinforcements FRP thickness /mm tensile strength /MPa elasticity modulus /GPa elongation rate /% rebar yield strength /MPa ultimate strength /MPa elasticity modulus /GPa CFRP 0.167 4420 260 1.7 φ4 306 418 203 AFRP 0.193 2060 118 >1.5 φ6 367 507 204 GFRP 0.172 3000 73 3.0 12 345 610 202 rectangular cross section and reinforced by two 12-mm-diameter low longitudinal deformed reinforcing bars, two 6-mm-diameter top longitudinal plain reinforcing bars, and 4-mm-diameter plain stirrups spaced at 60mm.
Table 2 Details of test beams specimen code corrosion condition strengthening method of hybrid FRP FRP sheet width/mm material number of layers B0 un-corrosion un-strengthen 0 0 B1 corrosion un-strengthen 0 0 3C0 un-corrosion CFRP/CFRP/CFRP 1/1/1 100 CAG0 un-corrosion CFRP/AFRP/GFRP 1/1/1 100 CAG1 corrosion CFRP/AFRP/GFRP 1/1/1 100 Instrumentation All beams were instrumented to measure the applied load, deflections and strains.
Online since: December 2012
Authors: Li Hui Wang, Hai Tao Jiang, Ji Bin Liu, Yu Chen, Di Tang
Effects of Continuous Annealing Process on Microstructures and Properties of C-Mn-Si Bearing Cold-Rolled TRIP Steel Lihui Wang1,2,a, Di Tang1,b, Haitao Jiang1,c, Jibin Liu2,d, Yu Chen 2,e 1.National Engineering Research Center for Advanced Rolling Technology, University of Science and Technology Beijing, Beijing 100083,China; 2.
Experimental Materials The chilled state experimental steel from industrial production was annealed using 12 kinds of annealed process on the CCT-AWY device of the sheet steel heating treatment in order to compare with the microstructures and properties of the TRIP steel.
How to get enough volume fraction and stability of retained austenite is a key element of TRIP effect and it is also an ultimate goal of TRIP steel annealing.
Materials Characterization, Vol 37 (1996), p1 [2] E.Girault, P.Jacques, Ph.Harlet,et al.
Materials Characterization, Vol 40(1998), p111 [3] Ziliu.X, Haitao.J, Qingwu.C, et al.
Online since: November 2011
Authors: Ming Yang, Tatsuya Sameshima, Takuya Yabe
Introduction Nanomaterials are increasing playing a key role in electronic, biological, chemical, and medical applications.
Substrate CNTs length Gap of clumping 1 Quartz glass 10 mm 20 mm 2 40 mm 80 mm 3 100 mm 80 mm 4 Quartz glass 20 mm 2~30 mm 5 Si/SiO2 25 mm 2~30 mm From the results of fluorescence analysis, it can be explained like following Biological materials (like protein and cell) are tend to adsorb to tips of micro structure.
CNTs look black because of its composition and structure, and black materials often adsorb light and release it as infrared light.
Yang, Nanostructured surface by self-assembly of carbon nanotubes for bio-analysis, Journal of Solid Mechanics and Materials Engineering vol. 3 No. 2, (2009), 366-374
Yang, Surface modification and density control of carbon nanotubes by Ar plasma irradiation, International Journal of material Forming, Proceeding of AMPT2010, (2010), CD-ROM.
Online since: May 2004
Authors: Rodrigo Martins, E. Bertran, Elvira Fortunato, Vasco Teixeira, A.C. Monteiro, Hai Ning Cui
Electrochromic materials change their optical properties persistently and reversibly under the action of voltage pulses.
The mechanism for coloration and bleaching for the WO3 electrochromic material have been given as: 10 Title of Publication (to be inserted by the publisher) 33 WOM bleach colour WOxexM x� � ++ �+ (2) where M+ denotes H +, Li+, Na +, etc.
The above reaction is typical for cathodic electrochromic materials. 3.0 3.2 3.4 3.6 3.8 4.0 4.2 0.0 5.0x10 -6 1.0x10 -5 1.5x10 -5 2.0x10 -5 2.5x10 -5 3.0x10 -5 3.5x10 -5 4.0x10 -5 � 2 (nm-2 ) h� (eV) 3.0 3.2 3.4 3.6 3.8 4.0 4.2 0.0 5.0x10 -6 1.0x10 -5 1.5x10 -5 2.0x10 -5 2.5x10 -5 3.0x10 -5 3.5x10 -5 4.0x10 -5 � 2 (nm-2 ) h� (eV) 3.0 3.2 3.4 3.6 3.8 4.0 4.2 0.0 5.0x10 -6 1.0x10 -5 1.5x10 -5 2.0x10 -5 2.5x10 -5 3.0x10 -5 3.5x10 -5 4.0x10 -5 � 2 (nm-2 ) h� (eV) 3.0 3.2 3.4 3.6 3.8 4.0 4.2 0.0 5.0x10 -6 1.0x10 -5 1.5x10 -5 2.0x10 -5 2.5x10 -5 3.0x10 -5 3.5x10 -5 4.0x10 -5 � 2 (nm-2 ) h� (eV) Ƶ - 27%� - 16% ڜ- 12% ٨- 10% (4 Min.)
Based on this materials, an electrochromic device (ECD) was built based in glass / ITO / WO3/ Li-electrolyte /SnO2 / ITO / glass strucutres.
Teixeira, Key Engineering, Editor: Teresa Vieira (Trans Tech Publications, Switzerland 2001), p. 388.
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