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Online since: December 2014
Authors: Yan Ling Lv, Bao Jun Ge, Da Jun Tao, Chuan You Dong
Analysis of negative sequence operation characteristics for nuclear half speed steam turbine generator
Dong Chuanyou1,2,a, Ge Baojun2,b, Lv Yanling2,c, Tao Dajun2,d
1Harbin Institute of Technology ,Harbin, China,
2Harbin University of Science and Technology, Harbin, China
adcy131086@163.com,bGebj@hrbust.edu.cn,cYanling0828@163.com,dtao.dj@163.com
Keyword: nuclear generator; negative sequence characteristics ; flux density
Abstract: The development of China's nuclear power industry is very rapid in recent years, nuclear generator also gets great development.
Half-cycle conditions using electromagnetic field distribution, the range takes a pole rotor finite element solution for the region, given consideration, as well as different nonlinear saturation slotted rotor structure of the rotor material in the analysis of the motor magnetic field.
Fig.3(a) Stator voltage waveform under rated load Fig.3(b) Stator current waveform under rated load Because of the nonlinear magnetic field caused by the motor material saturated distortion, given the impact of the rotor cogging and many other factors, even if the timing generator terminal voltage at rated load current also contains a certain amount of harmonic components. results of Terminal voltage and current of the rated load of the FFT harmonic content and percentage of decomposition are shown in Table 2.Rated conditions flux density harmonic synthesis exploded view is shown in Figure 4.
Acknowledgements Project support by department of education science and technology of Heilongjiang province China (12521089).
FEM calculation for eddy current field of turbine generator rotor under negative sequence [J].Journal of Tsinghua University(Science and Technology),1979(01):60-71
Half-cycle conditions using electromagnetic field distribution, the range takes a pole rotor finite element solution for the region, given consideration, as well as different nonlinear saturation slotted rotor structure of the rotor material in the analysis of the motor magnetic field.
Fig.3(a) Stator voltage waveform under rated load Fig.3(b) Stator current waveform under rated load Because of the nonlinear magnetic field caused by the motor material saturated distortion, given the impact of the rotor cogging and many other factors, even if the timing generator terminal voltage at rated load current also contains a certain amount of harmonic components. results of Terminal voltage and current of the rated load of the FFT harmonic content and percentage of decomposition are shown in Table 2.Rated conditions flux density harmonic synthesis exploded view is shown in Figure 4.
Acknowledgements Project support by department of education science and technology of Heilongjiang province China (12521089).
FEM calculation for eddy current field of turbine generator rotor under negative sequence [J].Journal of Tsinghua University(Science and Technology),1979(01):60-71
Online since: May 2012
Authors: Jing Li, Da Long Jiang, Xiao Ming Li
Gas Exchange Characters with SO2 Fumigation of Different Concentration and Time in Soybean
LI Jing,JIANG Da-Long,LI Xiao-Ming*
School of Environmental Science and Engineering, Shandong University
Jinan 250100,Shandong, P.
Material and method 1.Material The soybean planted in pot after warm water germination in natural light. 2.Method The plants were treated in airtight container and were exposed to SO2 for different concentration and fumigation time.
Environmental Science, 1985, 6(6) :59-66.
Research of Environmental Sciences,1997,10 (6): 5-9.
Journal of Experimental Botany,1981, 3(2): 667-677
Material and method 1.Material The soybean planted in pot after warm water germination in natural light. 2.Method The plants were treated in airtight container and were exposed to SO2 for different concentration and fumigation time.
Environmental Science, 1985, 6(6) :59-66.
Research of Environmental Sciences,1997,10 (6): 5-9.
Journal of Experimental Botany,1981, 3(2): 667-677
Online since: February 2012
Authors: Jin Song Chen
All above are used to keep the auto engine work in the best ignition status, which can also substantially save raw materials, reduce environmental pollution, and improve the car's dynamics of the economy performance in motion.
Science Technology and Industry. 2008(8)
Science Technology Information. 2006 (8)
Automotive vehicle network technology and the application[J].Shao Yang College Journal( Natural science Edition).2006(1)
Science Technology and Industry. 2008(8)
Science Technology Information. 2006 (8)
Automotive vehicle network technology and the application[J].Shao Yang College Journal( Natural science Edition).2006(1)
Online since: May 2011
Authors: Min Zhao, Guang Ying Hui Du, Ning Zhang, Chun Lei Wang
Inducement expression and synthetic dyes decolourization capacity of CotA
Ning Zhang1,a, Min Zhao1,*, Chunlei Wang1,b and Guangyinghui Du1,C
11Life Science Collage, Northeast Forestry University, Harbin, Heilongjiang, P.
Materials and methods Microbial strains and chemicals Escherichia coli BL21 (DE3) cotaining expression vector pET22b-cotA was maintained on LB agar slants at 4 ˚C.
Acknowledgements This work was funded by Graduate Student Scientific and Technological Innovation Foundation of Northeast Forest University of 2009, National Natural Science Foundation (30170775, 30671702), and World Wide Fund For Nature (WWF, CN0078.01).
Kaul: Journal of Environmental Sciences.
Materials and methods Microbial strains and chemicals Escherichia coli BL21 (DE3) cotaining expression vector pET22b-cotA was maintained on LB agar slants at 4 ˚C.
Acknowledgements This work was funded by Graduate Student Scientific and Technological Innovation Foundation of Northeast Forest University of 2009, National Natural Science Foundation (30170775, 30671702), and World Wide Fund For Nature (WWF, CN0078.01).
Kaul: Journal of Environmental Sciences.
Online since: January 2013
Authors: Fa Qing Fan, Pei Yong Wang
High-speed and high-temperature are the characteristics of the flow field in scramjet engine; the regular non-slip wall boundary condition requires zero speed at wall; in the same time, the material temperature limit does not allow high wall temperature; therefore the velocity gradient and temperature gradient in the engine boundary layer are huge.
A non-slip and constant temperature (1100K, assumed wall material limit) boundary condition is applied for the down wall.
We set the wall temperature 1100K which is the limiting temperature of the material we assumed.
Acknowledgement: This work was supported by the Fundamental Research Funds for the Central Universities of China (Grant No. 2010121045), National Science Foundation of China (Grant No.51106131), and the Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry.
[7] Garcia A.L., Alder B.J., Generation of the Chapman-Enskog Distribution, Journal of Computa- tional Physics 140, 1998, 66-80 (1998)
A non-slip and constant temperature (1100K, assumed wall material limit) boundary condition is applied for the down wall.
We set the wall temperature 1100K which is the limiting temperature of the material we assumed.
Acknowledgement: This work was supported by the Fundamental Research Funds for the Central Universities of China (Grant No. 2010121045), National Science Foundation of China (Grant No.51106131), and the Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry.
[7] Garcia A.L., Alder B.J., Generation of the Chapman-Enskog Distribution, Journal of Computa- tional Physics 140, 1998, 66-80 (1998)
Online since: July 2015
Authors: Gidion Turu'allo
Siddique, Waste materials and by-products in concrete 2007: Springer Verlag
Khan, Supplementary cementing materials 2011: Springer Verlag
ACI materials journal, (1995). 84(4)
Metallurgical and Materials Transactions, 2005. 36(6): p. 873-883
Choo, Advanced Concrete Technology: Constituent Materials.
Khan, Supplementary cementing materials 2011: Springer Verlag
ACI materials journal, (1995). 84(4)
Metallurgical and Materials Transactions, 2005. 36(6): p. 873-883
Choo, Advanced Concrete Technology: Constituent Materials.
Online since: November 2011
Authors: Pu Hong Li, Zhi Jun Fan
Fractal theory studies the complex systems or phenomenon and hidden in the following laws of science.
Later some scholars have gradually discovered that the fractal, existing in the physical, biological, social, materials and other disciplines, is a universal phenomenon, and becomes a hot topic in natural sciences even social science research.
Project leaders are selected to serve as according to developing requirements of product, for example, industrial designers take charge in design project emphasizing on appearance and functionality, while, engineers in charge of project focusing on technology and new materials.
Design management Design project fractal ( DF ) Service fractal ( SF ) Technology fractal ( TF ) User fractal ( UF ) enterprise management financial management Human Resource Management else mechanical structure electronic material manufacture market purchasing external relations Project A Project B SF UF designer TF SF UF TF designer From the fig.4,we can see advantages of fractal structure: it is a matrix organization structure in nature, has advantages of matrix structure and own characteristics, to overcome shortcomings of general parallel organization, thus can be better able to meet the operation and management of design projects.
(In Chinese) [8] Yang Jun, Liu Liwen:Fractal Theory and Design of the Production System Organization in Enterprise[J].Journal of Industrial Engineering/Engineering Management, Vol.12 (1998) No.2. p13-19 (In Chinese) [9] Wan Jiasheng: The Generation, Concept and Management Mode of Fractal Enterprise[J].ShanDong Social Science,(2008)No.2,p146-148.
Later some scholars have gradually discovered that the fractal, existing in the physical, biological, social, materials and other disciplines, is a universal phenomenon, and becomes a hot topic in natural sciences even social science research.
Project leaders are selected to serve as according to developing requirements of product, for example, industrial designers take charge in design project emphasizing on appearance and functionality, while, engineers in charge of project focusing on technology and new materials.
Design management Design project fractal ( DF ) Service fractal ( SF ) Technology fractal ( TF ) User fractal ( UF ) enterprise management financial management Human Resource Management else mechanical structure electronic material manufacture market purchasing external relations Project A Project B SF UF designer TF SF UF TF designer From the fig.4,we can see advantages of fractal structure: it is a matrix organization structure in nature, has advantages of matrix structure and own characteristics, to overcome shortcomings of general parallel organization, thus can be better able to meet the operation and management of design projects.
(In Chinese) [8] Yang Jun, Liu Liwen:Fractal Theory and Design of the Production System Organization in Enterprise[J].Journal of Industrial Engineering/Engineering Management, Vol.12 (1998) No.2. p13-19 (In Chinese) [9] Wan Jiasheng: The Generation, Concept and Management Mode of Fractal Enterprise[J].ShanDong Social Science,(2008)No.2,p146-148.
Online since: November 2012
Authors: Feng Lan Luo
The Supply Chain and Agricultural Supply Chain
Today, the concept of supply chain has been paid more attention in the chain of relationships, net core enterprise supply chain in the core business, through the control information, logistics, capital flow, from the raw materials and intermediate products and agricultural products, in order to sell the final product to consumers hand sales network [2].
This is a network chain structure made of agricultural suppliers and farmers and agricultural production and agricultural product processing enterprise, wholesalers, retailers and consumers, through the farm the control of flow, logistics and cash flow from purchasing raw materials, intermediate, the quality of products and finished products to the produce of the sale into the hands of consumers sales network [2, 3].
In storage, transportation, must adopt a series of measures, such as low temperature, dry, moisture proof and material, in order to ensure the value of agricultural products.
With the deepening of economic globalization, low-carbon, of science and technology, comprehensive national strength in increasingly competitive, countries are increasing emphasis on low-carbon policy formulation and development of science, so that they can better seize opportunities, meet challenges, and develop Growth.
Xiaosheng Li, Limin Yang, Liangyi Bai, "Supermarket-led Supply Chain of Fresh Agricultural Products," Lanzhou Academic Journal, no.9, 2009,pp:76-78 [7].
This is a network chain structure made of agricultural suppliers and farmers and agricultural production and agricultural product processing enterprise, wholesalers, retailers and consumers, through the farm the control of flow, logistics and cash flow from purchasing raw materials, intermediate, the quality of products and finished products to the produce of the sale into the hands of consumers sales network [2, 3].
In storage, transportation, must adopt a series of measures, such as low temperature, dry, moisture proof and material, in order to ensure the value of agricultural products.
With the deepening of economic globalization, low-carbon, of science and technology, comprehensive national strength in increasingly competitive, countries are increasing emphasis on low-carbon policy formulation and development of science, so that they can better seize opportunities, meet challenges, and develop Growth.
Xiaosheng Li, Limin Yang, Liangyi Bai, "Supermarket-led Supply Chain of Fresh Agricultural Products," Lanzhou Academic Journal, no.9, 2009,pp:76-78 [7].
Online since: October 2013
Authors: Min Hsiang Wu, Chil Chyuan Kuo, Ming Yang Lai
Materials used for soft tooling own low hardness levels such as silicone rubber and epoxy resins.
Materials used for hard tooling often have high hardness levels.
Liquid silicone rubber has a large number of bubbles because of mixing reaction of materials.
Haberland,” Experimental studies on selective laser melting of metallic parts,”Materials science and engineering technology, Vol. 39 (2008), Issue 9, p. 665–670
Bolt,” Study on the usability and robustness of polymer and wood materials for tooling in sheet metal forming,” Journal of Materials Processing Technology, Vol. 202 (2008), p. 47-53
Materials used for hard tooling often have high hardness levels.
Liquid silicone rubber has a large number of bubbles because of mixing reaction of materials.
Haberland,” Experimental studies on selective laser melting of metallic parts,”Materials science and engineering technology, Vol. 39 (2008), Issue 9, p. 665–670
Bolt,” Study on the usability and robustness of polymer and wood materials for tooling in sheet metal forming,” Journal of Materials Processing Technology, Vol. 202 (2008), p. 47-53
Online since: December 2003
Authors: José Maria F. Ferreira, A.F. Lemos
Introduction
There has been much interest in the development of porous synthetic bone replacement materials
for the filling of both load bearing and non-load bearing osseous defects since the demonstration of
improved biocompatibility of macroporous materials as compared with dense bodies [1].
Biocompatibility of HA-based materials, namely glass reinforced hydroxyapatite (GR-HA) materials have been already well established [2,3].
Materials and Methods A synthetic medical grade hydroxyapatite powder HA (P215S, Plasma Biotal Limited, UK) was used.
Santos: Journal of Non-Crystalline Solids Vol. 304 (2002), p. 286
Ferreira: in press Advanced Materials Forum (2003)
Biocompatibility of HA-based materials, namely glass reinforced hydroxyapatite (GR-HA) materials have been already well established [2,3].
Materials and Methods A synthetic medical grade hydroxyapatite powder HA (P215S, Plasma Biotal Limited, UK) was used.
Santos: Journal of Non-Crystalline Solids Vol. 304 (2002), p. 286
Ferreira: in press Advanced Materials Forum (2003)