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Chemical composition analysis of three commercially important fish species (sardine, anchovy and mackerel) Yuwei Feng1,2,a, Lizhen Ma1,b*, Yucan Du1,c, Sanhong Fan2,d，Ruitong Dai3,f 1 Department of Food Science, Tianjin Agricultural University, Tianjin, 300384, China; 2 College of Life Science, Shanxi University, Taiyuan, 030006, China; 3 College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China; a fywei520@163.com, bmalizhen-6329@163.com, c282354019@qq.com, d fsh729@sxu.edu.cn, fdairuitong@gmail.com Keywords: Marine fish; Proximate composition; Mineral; Fatty acid; Amino acid Abstract：Crude protein, total lipids, moisture, total ashes and selected mineral (Ca, Mg, Fe, Zn, Cu, Mn) content, fatty acid and amino acid composition were determined in the muscle tissue of three widely consumed fish species (sardine, anchovy and mackerel) obtained from Quanzhou of China.
As mentioned in the literature [2] they are among the best sources of n-3 fatty acids, which not only serve as food materials, but also as a source of EPA and DHA [3].
Materials and Methods Sample collection.
Sagredos, Fat Science Technology, 95, 66–69(1993)
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Rubanik (Ed.), Emerging Materials and Technologies in 2 Volumes, UO Vitebsk State Technological University, Vitebsk, 2019, Volume 2, pp. 67-86
Danilov, Determination of Thermal Effects of Diffusionless Phase Transformations in Low-Carbon Low-Alloy Steels at High Cooling Rates, Diagnostics, Resource and Mechanics of Materials and Structures Iss. 6. (2018) 173-183.
Rubanik (Ed.), Emerging Materials and Technologies, UO Vitebsk State Technological University, Vitebsk, 2019, pp. 516-517
Technical Sciences, №10 (2020) 67-72
Results and Conclusions, Journal of Chemical Technology and Metallurgy, Volume 55 (2020) № 1 171-181

Generally speaking, the failures of materials, such as wear, corrosion, fatigue and so on, are generated from their surface[4].
This problem can be overcome by improving the surface properties of the materials[5,6].
Tu: Materials Review, Vol.23(2009), p.89-91
Boutorabi: Materials Processing Technology, Vol.153-154(2004), p.199-202
Gu: Chinese Materials Seminar(Beijing,China, November 22-26, 1994).

Therefore, it can not satisfy the holding and operating requirements of the objects that with complex shape and different materials.
The forms of finger surface are mainly determined by the shape, surface and surface materials of grasped objects.
When fingers clamp objects, elastic materials produce deformation and contact with the external counter of object.
Meanwhile, elastic materials also can increase the surface friction force of objects that will meet the grasping requirement of smooth object.
Journal of Engineering Design, 1997, 8(2):107-117

No results are shown for objects made of other materials.
However, for materials of high hardness, regular milling cutters may not be as adequate as grinding wheels.
The common abrasive materials for a grinding wheel are silicon carbide, aluminum oxide, cubic boron nitride, manufactured diamonds, etc.
Yang, The 3D construction of partial edentulous model with ICT images, Journal of Modern Stomatology, Vol. 20, No. 4 (2006), pp.385-387.
Groover, Fundamentals of Modern Manufacturing materials, processes, and systems, John Wiley & Sons, Inc.

., Materials Science and Engineering: An Introduction, Seventh Edition, John Wiley & Sons, Inc., Publication, 2007, pp. 362,149 [2] Sindo Kou, Welding Metallurgy, Second Edition, John Wiley & Sons, Inc., Publication,2002, pp. 405, 411, 432 [3] Kim H J.
Yang, Ultrasonic Stress Evaluation on Welded Plates with Lcr Wave, Science & Technology of Welding and Joining. 13(2008)70-75 [10] Altino J.
Loureiro, Effect of Heat Input on Plastic Deformation of Undermatched Welds, Journal of Materials Processing Technology. 128(2002)240-249 [11] C.
Bhadeshia, Very Strong Bainite, Current Opinion in Solid State and Materials Science. 8(2004)251-257 [13] H.

Mobile Internet Oriented M-Learning System JieMei Lin 1, a, Rong Huang 2,b , Jiayin Zhao1, c，, Qing Dai1, d 1 General Fundamental Scientific Department,Beijing City University ,Beijing, China 2 Electrical&Electronic Engineering College,Shanghai University of Engineering Science,Shanghai, China abculin@126.com, bhuangrong62@126.com,czhaojiayin001@163.com,ddqczh1@163.com Keywords: M-Learning, Mobile Internet, Smartphone Abstract: In recent years, the mobile internet is deployed rapidly in large-scale.
The digital format learning materials are stored or transmitted with mobile computing technologies via the mobile internet, so that the learning could conducts without restrictions on time and place with smart mobile devices, and become easier and universal accessible.
The intelligent capability is required on self-optimized searching, for example, on one hand the searching need to quickly hit the desired answer considering all possible angles from the learning aspects, including the relevant concept, examples, discussions, testing, etc, on another hand, the background analysis according to the search content and rate could be enabled and presented to the learner combined with all relevant materials as focused topic selections which could help the learner to review, and even be a good reference for others.
(2) General design The M-Learning system is including several sub-systems e.g. the account, message, classes, materials, question and answer, and schedule management sub-systems.
* This work is supported by Beijing Municipal Finance Project （PXM2012 014202 000203）and Shanghai University of Engineering Science Foundation (A-2500-11-01125) Reference [1] Beran Necat, Distance Learning (Remote Learning) For Mobile Internet Users [J], The Turkish Online Journal of Distance Education, 2007 [2] Fang Haiguang, Wang Hongyun, Huang Ronghuai, the mobile learning system environment map -- mobile learning demotic and abroad research and the case study of the application of modern educational technology [J],Modem Educational Technology, 2011,01:14-20

Introduction The correlation of the electronic and magnetic properties of colossal magnetoresistance (CMR) materials with structural properties has been a topic of enormous research activity over the last few years.
Today, the most common bolometer temperature sensing materials are vanadium oxides (VOx) have TCR above 4 %/K and amorphous silicon (α-Si) with TCR up to about 3%/K at room temperature (RT) [2,3].
The values of residual compressive strain in the films due to the substrate-material mismatch have been calculated using the Eq.1
Chen, Thousandfold Change in Resistivity in Magnetoresistive La-Ca-Mn-O Films, Science 264 (1994) 413-415
Kuberkar, Grain Size Dependent Transport and Magnetoresistance Behavior of Chemical Solution Deposition Grown Nanostructured La0.7Sr0.3MnO3 Manganite Films, Journal of Nanoscience and Nanotechnology 8 (2008) 4146-4151

Materials and Methods Field site description.
Agricultural Sciences in China Vol. 7(7) (2008), p. 853-859
Journal of Zhejiang University (Agric. & Life Sci.)
Journal of Soil and Water Conservation Vol. 16(4) (2002), p. 102-104 (in Chinese)
Journal of Cotton Science Vol. 8(3) (2004), p. 130-141

Geopolymers have appeared as promising materials in various fields as a result of the better properties relatively to ceramics and to cement-based materials.
However, further research is needed to understand the science behind the geopolymer technology.
Davidovits, Geopolymer- inorganic polymeric new materials, J Therm Anal.
International Journal of Mineral Processing, 2000, Vol. 59; pp. 247-266
Gutmanas, Materials with fine microstructures by advanced powder metallurgy, Prog.