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Application of Fuzzy PI Control to Speed Control System of Brushless DC Motor Fahuan Hu 1,a, Xiaotong Qiu 2,b, Jun Tang 1,c 1Faculty of Mechanical and Electrical Engineering, Jiangxi University of Science and Technology, Ganzhou.Jiangxi, China, 341000. 2Faculty of Applied Science, Jiangxi University of Science and Technology, Ganzhou,Jiangxi, China, 341000.
Introduction The emergence of brushless DC motor (BLDCM) is with development of the power electronic technology, the microelectronic technology and the high-performance permanent magnet material.
Acknowledgements This work was financially supported by the National Natural Science Foundation of China (51104067).
Journal of Huazhong University of Science and Technology(Natural Science Edition),2007,32(12):65-67.
Xi'an University of Electronic Science and Technology publishing house, (2008).

Optimization of resin concrete(artificial granite) material Aggregate material Aggregate material is one of the main components of resin concrete materials, it can be divided into fine aggregate material and coarse aggregate material.
Properties of coarse aggregate materials Aggregate diameter /mm Aggregate specific gravity Aggregate Proportion /% Aggregate Wear rate/% Moisture content /% Aggregate Linear elongation /% Soft stone rate /% Compressive Strength /Mpa 13.2～19 2.609 23.1 12.2 0.88 6.6 1.9 119 9.5～13.2 2.603 11.8 1.17 10.2 2.1 2.5～9.5 2.590 11.6 2.20 8.4 1.6 Aggregate requirement >=2.6 <=26 <=28 <=2.0 <=15 <=3 Filling material Resin concrete consists of a large amount of stones listed above, some appropriate filling materials are also necessary to add in, which will reduce the amount of resins and expenses, and also improve the physical and mechanical properties of resin concrete[2], the neutral or alkaline filling materials that used often and their functions are listed in Table 2.
In the experiment, we just change the mix proportion of fine and coarse aggregate materials to study the influence of properties of resin concrete brought by mix proportion of aggregate material.
Journal of Liaoning Technical University (Natural Science Edition),2001,12(6):770-772
Beijing: Science Press.

Create materials with high wear resistance, but at the same time increase their plasticity. 3.
The modern development of science and technology level, especially in cold climate conditions, for example, in the conditions of the Republic of Sakha (Yakutia), requires a wider use of three types of new materials that differ in their physico-mechanical and technological properties: - first type materials must be cold-resistant and corrosion-resistant with different levels of durability; - second type materials are high durability and wear-resistant, but they are usually prone to brittle fracture; - third type materials must have both cold-resistant and high-durability properties.
Petrov, Prospects, problems and objectives of metallurgy in the Republic of Sakha (Yakutia) using local mineral raw materials, Eurastrencold 2018 Conf Materials. 1(2018) 72-81
Petrov, Features of the mineral-geochemical composition of metallurgical raw materials of Yakutia, Eurastrencold 2010 Conf Materials. 1(2010) 9-18
Apostolopoulos, The role of the mesostructure in the thermomechanical treatment of metal materials, Metal science and heat treatment. 619 (2007) 30-33

Constituent materials of UHPC.
Acknowlegements This work is supported by Natural Science Foundation of China (Grant Number: 50478502).
A.Graybeal: ACI Material Journal, Vol.104,(2007), p. 146
Doctoral thesis of University of Hunan (2007)(in Chinese) [4] B.Y.Pierre and C.Marco: PCI Journal, Vol. 40( 1999), p. 60 [5] D.
Pei: Journal of materials in civil Engineering, ASCE., Vol 10 ( 1998),P.86 [10] ACI Committee 318.

Schmidt et al. [5] adapted this welding strategy to perform a comparative study on aluminum, copper and nickel-plated steel (hilumin) as connector materials.
Due to the low thickness of the cell case in the range of a few hundreds of micrometers and a high temperature sensitivity of the battery materials, a pulsed welding strategy may be favorable in comparison to cw welding, as the heat input is reduced while the reproducibility of the joining process is maintained.
Experimental Setup Conductor Materials.
Gillner, Spatially Modulated Laser Beam Micro Welding of CuSn6 and Nickel-plated DC04 Steel for Battery Applications, in: Proceedings of the 6th International Congress on Laser Advanced Materials Processing, Niigata, 2013, pp. 1-8
Jossen, Welding Techniques for Battery Cells and Resulting Electrical Contact Resistances, in: Journal of Energy Storage, 2015, pp. 7-14

[2] A.F Lisovsky: International Journal of Refractory Metals and Hard Materials Vol. 21 (1-2) (2003), p. 63 [3] R.
In: HIGH PRESSURE INFLUENCE IN THE STRUCTURE AND PROPERTIES OF THE SUPERHARD MATERIALS.
Filgueira: Journal of Refractory Metals and Hard Materials Vol. 21 (5-6) (2003), p. 251
Tardim: Materials Science Forum Vol. 660 (2010), p. 483
Shishkin: The polycrystalline materials based on diamond.

This scheme allows to minimise material loss due to rolling defects.
This is of prime importance for the wear of soft materials, where material loss occurs when ductility is exhausted.
To start with, relatively little is known about the recrystallisation behaviour of materials with a contiguous second phase [7].
The optimal temperature for the heat treatment was found to be in the range of 300 to 400°C, with relatively strong materials being obtained at the lower value, while the higher temperatures yield a highly ductile and tough product.
Elsevier Science, Netherlands, 1995

Rosso d 1 Institute of Engineering Materials and Biomaterials, Silesian University of Technology, ul.
Konarskiego 18a, 44-100 Gliwice, Poland 2 Department of Materials Science and Chemical Engineering, Politecnico di Torino -Alessandria Campus, Viale T.Michel 5, 15100 Alessandria, Italy a leszek.dobrzanski@polsl.pl, bzbigniew.brytan@polsl.pl, cmarco.actis@polito.it, d mario.rosso@polito.it Keywords: powder metallurgy, stainless steels, vacuum sintering.
Metallographic specimens of all test materials were analyzed in the unnotched as well as etched conditions.
There appears to be no significant change in the pore shape for all the materials that were evaluated.
Pallavicini, Journal of Materials Processing Technology, Vol. 157-158, pp. 312-316, 2004

The airfoiles of wind turbine blade structure are more perfect and the mechanical properties of materials are significantly improved based on these researches.
The material of blade is glass fiber reinforced plastic(FRP)[10], the performance indicators are shown in Table 2.
Sherwood and Matthew Huber: Proceedings of the National Academy of Sciences of the United States of America,Vol.107 (2010) ,pp.9554-9555
(In Chinese) [3] Ole Thybo Thomsen: Present and Future: Journal of Sandwich Structures and Materials, Vol. 11 (2009), pp.7-12
Selwin and Rajadurai: Mechanics of Advanced Materials and Structures Vol. 16 (2009), pp.467-469

State Key Laboratory Cultivation Base for Nonmetal Composite and Functional Materials, Southwest University of Science and Technology, Mianyang, Sichuan 621010, PR China axuhuayi@qq.com Keywords: Vibration mill, Phosphorous slag, Grinding Abstract.
Phosphorous slag is used by producing building materials, such as preparation bricks, low-clinker cement and mineralizer.
Table 1 Chemical composition of phosphorous slag (%) Raw materials SiO2 Al2O3 Fe2O3 CaO MgO P2O5 ∑ Phosphorous slag 38.39 2.80 0.29 50.61 2.29 1.93 96.31 The grinding equipment is Type 2MZG-38 vibration mill.The water content of phosphorous slag is controled below 0.3% before it is ground.The ratio of ball-to-material is 15.When phosphorous slag is ground every 15 minutes, we get a sample.
Acknowledgements This work is financially supported by the Open Project of Key Laboratory for Advanced Building Materials of Sichuan Province (Number 09zxxk08).
Journal of Luoyang Thchnology Clollege(in Chinese), 1994,4(4):1-9