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Online since: April 2010
Authors: Feng Chao Luo, Jun Hu, Jin Liang He, Wang Chen Long, Jun Liu
Saturation Effect of Al(NO3)3 Dopant on Residual Voltages of ZnO
Based Varistor Ceramics
Wangcheng LONG a , Jun HU, Jinliang HE b , Jun LIU and Fengchao LUO
Department of Electrical Engineering, Tsinghua University, Beijing 100084, CHINA
a longwc07@mails.tsinghua.edu.cn,
b hejl@tsinghua.edu.cn
Key Words: ZnO varistor; Low residual voltage; Resistivity; Non-linear characteristic.
Han: Materials Letters.
Han: Materials Letters.
Online since: July 2011
Authors: Wei Ling Liu, Lin Bo Zhang, Jing Hai Zhu
This would help to achieve the rational use of resources, and ensure the sustainable development in the process of rapidly economic growth, industrialization and urbanization
Materials and Methods
(1) Study Area
Fig.1 Location of the study area
Study area is located in Liaoning Coastal Economic Zone, northeastern China.
The long-term impacts on land use change caused by these policies should be the key task in future research.
Li: Photogram metric Engineering and Remote Sensing Vol. 67 (2001), p. 83-90
The long-term impacts on land use change caused by these policies should be the key task in future research.
Li: Photogram metric Engineering and Remote Sensing Vol. 67 (2001), p. 83-90
Online since: June 2012
Authors: Jian Fu Zhang, Lei Zhang, Ya Hong Li, Bing Fang
The testing and finite element analysis of temperature distribution and thermal deformation in vertical machining center
Bing Fang1,a, Lei Zhang1,b, Jianfu Zhang2,c, and Yahong Li3,d
1 College of Mechanical Science and Engineering, Jilin University, Changchun 130022, China
2DPIM, Tsinghua University, Beijing 100084, China
3BMEIMT Co., Ltd.
Ignoring the radiation heat transfer, the contact conductance coefficient hc could be calculated by the following equation (4) where Lg is the thickness of the void space between two contact surfaces, Ac is the real contact area of the joint, Av is the void area of the joint, k1, k2, kf are the thermal conductivities of the materials of the two parts and the medium, respectively.
Acknowledgements This work was financially supported by the National Key Science and Technology Projects of China (2009ZX04014-035).
Ignoring the radiation heat transfer, the contact conductance coefficient hc could be calculated by the following equation (4) where Lg is the thickness of the void space between two contact surfaces, Ac is the real contact area of the joint, Av is the void area of the joint, k1, k2, kf are the thermal conductivities of the materials of the two parts and the medium, respectively.
Acknowledgements This work was financially supported by the National Key Science and Technology Projects of China (2009ZX04014-035).
Online since: August 2012
Authors: Hong Chen, Qiong Li, Endon Wang
Towards the Climate Adaptive Residential Buildings Design
Hong Chen1, a,*, Endong Wang2, b Qiong Li 1,c
1 School of Architecture, Zhengzhou University, Zhengzhou, Henan, China, 450001
2 College of Engineering, University of Nebraska-Lincoln, 113 NH, Lincoln, NE, USA, 68588
a,* chenhong@zzu.edu.cn(corresponding author), b wedseu@gmail.com, c tsmzw341@sina.com
Key words: Climate adaptability, Residential energy efficiency; Wind forces; Sunshine; Simulation
Abstract.
Limited to the capacity of the economy, the level of technology and the availability of high performance materials, for Chinese architects, it may be more practical to consider the traditional energy saving measures, e.g. making full considerations of local climate when designing buildings.
Limited to the capacity of the economy, the level of technology and the availability of high performance materials, for Chinese architects, it may be more practical to consider the traditional energy saving measures, e.g. making full considerations of local climate when designing buildings.
Online since: January 2012
Authors: Fan Sheng Meng, Wen Wei Huang
So viscosity is a key parameter to engine oil performance[2,3].
Experiment results indicate that base value of LNG engine oil varied too much and engine oil should be changed earlier. 2.4 Acid value increment Variation of acid value reflects oxidization conditions of base oil and degradation conditions of alkaline additives, in the high temperature conditions, acid oxide generated from the fuel burning and acid material originated from oil oxidization keep rising which increase the acid number constantly [5].
Rising acid number would decline oil performance and induce metal material corrosion, especially bearing corrosion.
Lubrication engineering.2006,181(9):p. 139-144
Experiment results indicate that base value of LNG engine oil varied too much and engine oil should be changed earlier. 2.4 Acid value increment Variation of acid value reflects oxidization conditions of base oil and degradation conditions of alkaline additives, in the high temperature conditions, acid oxide generated from the fuel burning and acid material originated from oil oxidization keep rising which increase the acid number constantly [5].
Rising acid number would decline oil performance and induce metal material corrosion, especially bearing corrosion.
Lubrication engineering.2006,181(9):p. 139-144
Online since: March 2006
Authors: X.C. Xu, Tsutomu Yamaguchi, Quan Sheng Liu, Chong Ge Wang
The key to this problem is how to make predictions to long-term response of rocks based on
mechanical models and test results within a short time of experiments.
(1) where ψ is the Helmholtz's free energy function, 'ijb are linear coefficients in Onsager's principle considered as material constants, jq are state variables in the system concerning strain components, temperatures and non-observable inner variables, and iQ are generalized forces.
(19) where D1 and D2 are material constants of rock, h is the free-volume fraction, VVh f /= , V is the whole volume of rock and Vf is the free volume after subtracting micro voids volume between grains.
Phys., Vol.25 (1954), p.1385 [7] Liu, Q., Wang, C.: Chinese Journal of Rock Mechanics and Engineering Vol.22 (2002), p.193 [8] Liu, Q., Xu, X., Yamaguchi, T.: Proc.
(1) where ψ is the Helmholtz's free energy function, 'ijb are linear coefficients in Onsager's principle considered as material constants, jq are state variables in the system concerning strain components, temperatures and non-observable inner variables, and iQ are generalized forces.
(19) where D1 and D2 are material constants of rock, h is the free-volume fraction, VVh f /= , V is the whole volume of rock and Vf is the free volume after subtracting micro voids volume between grains.
Phys., Vol.25 (1954), p.1385 [7] Liu, Q., Wang, C.: Chinese Journal of Rock Mechanics and Engineering Vol.22 (2002), p.193 [8] Liu, Q., Xu, X., Yamaguchi, T.: Proc.
Online since: January 2006
Authors: Quan Lin Bu, Yong Hong Zhang, Hui Qiang Tang, De Jin Hu
Studies on CCD On-Line Detection in Curve Grinding
Yonghong Zhang1, a, Huiqiang Tang1, b, Quanlin Bu2,c and Dejin Hu2,d
1
Department of Information & Communication, Nanjing University of Information Science &
Technology, China
2
School of Mechanical and Power Engineering, Shanghai Jiaotong University
a
nuist_zyh@yahoo.com.cn, bthq@jlonline.com, cqlbu@yahoo.com.cn, ddjhu@sjtu.edu.cn
Keywords: Circular tolerance zone; Curve grinding; CCD; Edge localization; Sub-pixel; Wear; Error
compensation.
Fig. 2 The new detection method for curve grinding based on circular tolerance zone Image Edge Localization According to the experimental components and its working principle of image measurement system, at a certain CCD camera resolution and measurement field of view, the key problem is how to improve edge localization precision of the work piece image.
[3] Pawel Lezanski: Journal of Materials Processing Technology, Vol. 109 (2001), p. 258
Fig. 2 The new detection method for curve grinding based on circular tolerance zone Image Edge Localization According to the experimental components and its working principle of image measurement system, at a certain CCD camera resolution and measurement field of view, the key problem is how to improve edge localization precision of the work piece image.
[3] Pawel Lezanski: Journal of Materials Processing Technology, Vol. 109 (2001), p. 258
Online since: December 2013
Authors: Yu Li, Bing Chuan Cheng, Lin Liu, Xiao Yu Cai, Meng Wang
Study on the Competitive Adsorption of Dimethoate with Multiple Pesticides and Heavy Metals Based on Fractional Factorial Design
Cheng Bingchuan, Liu Lin, Cai Xiaoyu, Wang Meng, Li Yu a
Resources and Environmental Research Academy, North China Electric Power University, Beijing, 102206, China
a liyuxx8@hotmail.com
Key words: composite contamination; fractional factorial design; best subset regression; heavy metal; pesticide; sediments; dimethoate
Abstract.
Materials and Methods Sediment samples collection and pretreatment.
Gao: Journal of Shenzhen University Science and Engineering Vol. 29 (2012) p. 10 [12] Y.
Materials and Methods Sediment samples collection and pretreatment.
Gao: Journal of Shenzhen University Science and Engineering Vol. 29 (2012) p. 10 [12] Y.
Online since: December 2013
Authors: Yun Xiang Liu, Hua Fang, Wan Jun Yu, Wen Ju Li, Ming Lei Shu
Research of Supporting Platform of Machine Olfaction
Hua Fang1,2,a,Yunxiang Liu1,2,b *,Wanjun Yu1,2,Wenju Li1,2,Minglei Shu1,2
1Shanghai institute of technology, School of computer science and information engineering, Shanghai, 201418, China
2Shanghai institute of technology, Research center of machine olfaction, Shanghai, 201418, China
afanghua@sit.edu.cn, byxliu@sit.edu.cn
Keywords: machine olfaction, gas sensor array, simulation template, supporting platform
Abstract.
Nanomaterials of conjugated polymers are found to have superior performance relative to conventional materials due to much larger exposed surface area [3].
Signal and data processing with various algorithms are key elements in a machine olfaction system as well as in most sensing instruments, for example e-nose.
Nanomaterials of conjugated polymers are found to have superior performance relative to conventional materials due to much larger exposed surface area [3].
Signal and data processing with various algorithms are key elements in a machine olfaction system as well as in most sensing instruments, for example e-nose.