Search results

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

Due to cost considerations, for these mid-power LED packages, the wire bonding process is employed and cost effective wire materials are used instead of gold wire.
The trend in wire materials is to reduce the gold content to 80% or 60% in Au wires, and then to increase the silver addition by over 80%.
In the past, Ag-alloy wire bonding materials have been studied for IC electronics packaging components.
Gam, et al., Effects of Cu and Pd addition on Au bonding wire/Al pad interfacial reactions and bond reliability, Journal of Electronic Materials 35 (2006) 2048-2055
Chen, et al., Observation of atomic diffusion at twin-modified grain boundaries in copper, Science 321 (2008) 1066-1069.

These textile composites have been used since 1950’s mostly for interior and exterior panels or parts in aircraft, automotive or as structural materials to resist heavy loads.
Material.
Saparudin, Mechanical properties evaluation of woven coir and kevlar reinforced epoxy composites, Advanced Materials Research. vol. 277 (2011) pp. 36-42
Maziah, Body armor technology: A review of materials, construction techniques and enhancement of ballistic energy absorption, Advanced Materials Research. vol. 489 (2012) pp. 806-812
Abu Bakar, Cellulosic/synthetic fibre reinforced polymer hybrid composites: A review, Materials Science and Engineering: A. vol. 528 no. 15 (2011) pp. 5190-5195.

Glassy wastes are also used to produce various thermal insulation materials [4-6].
Cementing materials are also made by dissolving cullet in alkalis.
Materials and Methods Portland cement manufactured by Serebryakovcement OJSC of the brand - CEM II / A 42.5N was used as the starting material for the experimental study.
Ilyina, Innovative technology for glazing concrete products, Successes in modern science. 2 (2013) 107-108
Bondarenko, Obtaining protective and decorative coatings on wall materials by plasma fusion method: monograph, Belgorod: Publishing House of BSTU named after V.G.

The use of two frequencies gave reasonable results to solve the equation system for the axial load S for both materials, see Fig.4.
The difference in length for the two materials is related to the fact that different grips with different surface properties had to be used.
Journal of Sound and Vibration.179 (5), 899-908, 1995
Journal of Sound and Vibration.329 (11), 2057-2067, 2010
Wood Science and Technology.24 (3), 233-245, 1990

Both the two methods are deficiencies, the former can not provide a comprehensive real-time analysis, and spend a lot of human resources and material resources; the latter model requires high precision, and can not be well adapted to frequent changes in the cells and various land types.
[4] Zhao Ting-bing, and Liu Shang-hong: GSM wireless network optimization, Science Consult,  2008(03), p. 49-49 [5] LIU Ming-chuan, and XU yang: Study on capacity and cover of the WCDMA ,Journal of Chongqing University of Posts and Telecommunications, 2004,16(4), p.121-125 [6] Liu Zhi-ping, Qiu Hong, and Yang Da-cheng: A GIS Based Forward Coverage Analysis Method of CDMA Systems, Journal of Beijing University of Posts and Telecommunications , 2004, 27(4), p.31-35
[8] Shao Chun-li, Hu Peng, Huang Cheng-yi, and Peng Qi: The Expatiation of Delaunay Algorithms and a Promising Direction in Application, Science of Surveying and Mapping, 2004, 29(6), p.68-71
[9] Jia Jinzhang, Liu Jian, and Song Shousen: Connectivity criteria based on adjacency matrix graphs, Journal of Liaoning university of engineering technology, 2003,22 (02), p.158-161.

Then take full consideration into material availability and research scale size and research scope and size accuracy requirement.
Journal of natural disasters. 1993, 2(2):1-7
Survey of the science and technology, 2004(6):38- 40
Journal of Mountain Science, 2007, 25(2):197-201
Journal of Hebei normal university. 1997, (3):329-333

(5) = the unit weight of the material.
Acknowledgements This work was financially supported by the National Natural Science Foundation of China (Grant No.50968007) ,the Cultivation Plan of Young Scientists (Star of Jing gang) in Jiangxi Province (Grant No. 2010DQ01800) and the Science and Technology Research Project of Jiangxi Provincial Department of Education(Grant No.
Journal of Earthquake Engineering 2000; 4(3):227-301
Journal of Structural Engineering (ASCE) 1975; 101(1):109-129 [4] Bielak J.
Journal of Geotechnical and Geoenvironmental Engineering (ASCE) 1999; 125(1):38-48

The fishery resources are also the early development of human marine resources, marine fishing industry has been as one of the important material basis for human survival and development.
An overview of the development of fishery equipment and engineering science and technology in China[J].
Proceedings of the Institution of Mechanical Engineers Part M-Journal of Engineering for the Maritime Environment, 2019, 233(1): 108-123
Journal of Zhejiang Ocean University (Natural Science Edition), 2020, 39(04): 353-357
Journal of Agricultural Engineering, 2017, 33(01): 90-94

These materials are used as alternate for crude aggregate in building material production.
The E-waste materials are used as bituminous mixture.
Concrete is in high demand around the world as a building materials.
While the non-metallic materials are reused for wide application [32].
Reused plastic are applied for making a maritime building materials, it is cost-effective and ecologically friendly than traditional marine construction materials [34].