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The distances from the best hitting point to the end of the baseball bat result from the three different materials, which are the bat’s original material, aluminum and the corked material.
Some materials show the lighter the bat is, the hitting accuracy of players with same skill level is higher.2)Ball’s fastest exit speed.
The effect of three different materials on the performance of the bat The change of different materials influnce the mass of bat, the different hardnesses also affect the value of the coefficient of restitution [11].
Journal of Biomechanics 39 (2006) 1001–1009
[9] ZANG Qiu-hua, MA Nan-jing Biomechanical Mechanism of Sweat Area of Tennis Racket and itsPractice SICHUAN SPORTS SCIENCE No.1, Mar.,2003 [10] Lian Yeguang, Lin Haoshan, Wang De-an, “Analysis of Laser Induced Thermal Stress of Metallic Cylindrical Shell”, Journal of Guilin University of Technology, vol. 29, no.1, pp. 158-160, 2009 [11] Practical Handbook of engineering materials Editorial Committee, Practical Handbook of engineering materials, Beijing: China Metrology Publishing Hous

Osteoconductive Nanocomposite Materials for Bone Regeneration Ewa Stodolak-Zych1, a, Magdalena Szumera2,b, Marta Błażewicz1,c 1AGH – University of Science and Technology, Faculty of Materials Science and Ceramics, Department of Biomaterials, al.
Mickiewicza 30, 30-059 Krakow, Poland 2AGH – University of Science and Technology, Faculty of Materials Science and Ceramics, Department of Advances Ceramics, al.
Materials and methods Polymer nanocomposite materials were produced on the basis of synthetic polymer: polycaprolactone (PCL, Sigma-Aldrich, MW = 60 000 Da).
Reis, Key Engineering Materials; 240-242 (2003) 111-142 [8] T.
Bogun, Journal of Physics, 146 (2009) 012026 [12] T.

Based on the results obtained, the samples made of two PLA materials were compared in the end to establish which produced PLA material sample is stronger.
The basic raw material for production is plant biomass, such as maize, cereals, potatoes, sugar beet, sugar cane, soybean, tobacco, and natural materials such as cellulose and lignite.
Novak-Marcincin, Production of composite material by FDM rapid prototyping technology, Applied Mechanics and Materials 474 (2014) 186-191
Novak-Marcincin, Testing of ABS Material Tensile Strength for Fused Deposition Modeling Rapid Prototyping Method, Advanced Materials Research 912-914 (2014) 370-373
Pandová, Manufacturing technologies in automotive production and waste water cleaning on zeolite in view of copper, MM Science Journal 2016 (2016) 1218-1221

From the aspect of the development of science and technology, it represents the production technology level of a specific historical stage in the process of social development, and reflects the application of scientific and technological achievements to practical production.
No matter the application of new building materials in the construction of factory buildings, the practice of the new construction technology, or the new development of natural science and technology reflected through the mechanical, chemical or materials technology during the production, they all show science and technology level of Tianjin in the past
(3) Beneficial to Achieve Low-carbon Economy and Ecological Environmental Protection A building will consume large amounts of energy and emissions of carbon dioxide and other pollutants from the production materials to the construction, so it always destroys the ecological environment.
Journal of South China University of Technology, 2005 (8) [3]Yu kongjian Primary Study on Chinese Industrial Heritage.
Architectural Journal, 2006

In order to determine the minimum thickness of cutting under different cutting condition of aluminum alloy materials 2A12 of micro-milling, research the size effect caused by the cutting edge radius and few microns per tooth in micro-milling process.
Therefore, to develop the cost-effective micro machining technology, which enables the fabrication of 3D shape that characterized in different materials and the micrometer or millimeter profile size, is quite important.
Shreyes: Journal of International Journal of Mechanical Sciences, Vol. 49 (2007), pp.650-660
Journal of International Journal of Machining and Machinability of Materials, Vol. 2 (2007), pp.451-468
Altan: Journal of Material Processing Technology, Vol. 146 (2004), pp.72-81.

Because the physical and chemical performances of work-piece surface material are different, the influence on various materials in MRF is not same.
Jacobs: International Journal of Modern Physics B, (1996) No.10, pp.2837-2848
Zhang: Chinese Science Bulletin, Vol.48 (2003) No.9, pp.981-987.
Kordonski: Advanced Materials for Optics and Precision Structures, Vol.67, pp.253-258
Wang: Chinese Science Bulletin, Vol.50 (2005) No.9, pp.85-87.

It is undeniable that these developments require a variety of supporting materials, one of which is a semiconductor material.
The effort made by researchers to maximize the function of semiconductor materials is to modify the shape of the material in the form of thin films.
Mandelis, Focus on materials, semiconductors, vacuum, and cryogenics, Journal Physics Today 72(10) (2019) 68-69.
Ahzan, Cristal Structure Characterization of Thin Layer Zinc Oxide, Materials Science and Engineering 196 (2017) 1-6.
Taufik, Characterization of Tin Oxide Doping Antimony Thin Layer With Sol-Gel Spin Coating Method for Electronic Device, Journal Materials Science Forum 966 (2019) 30-34. doi:10.4028/www.scientific.net/MSF.966.30.

In order to coal mine safety production and protection of the area’s fragile water environment, the curtain grouting technique using fly ash cement materials mainly is taken for preventing water.
Furthermore, the curtain grouting technique using fly ash cement materials mainly is taken for preventing water, which is not only helpful for coal mine safety production and protection of water resources, but also low cost.
[5] Xi'an branch, China coal science research institute.
Xi'an: Xi'an branch, China coal science research institute.
Journal o f Mining & Safety Engineering. 27 (1): 35-39. (2010)

One materials that has the property of absorbing radar waves is magnetite[1].
In the industrial world such as automobiles and aircraft manufacture, metal materials is vital.
In fact, corrosion is the main problem in the manufacture of metallic materials.
One of the good radar reception materials is having low porosity and density.
Yang, Ronghai Yu, Hydrothermal synthesis of magnetic Fe3O4/grapheme composites with good electromagnetic microwave absorbing performances, Journal of Magnetism and Magnetic Materials 426, (2017), pp. 114 - 120

Present study on the performance of these materials, focused on the static compression and dynamic buffer performance test analysis.
Therefore, used reliability analysis method, researched the static compressive mechanical properties of materials, analyzed the stress - strain relations, the established the appropriate reliability model, predicted reliability requirements of materials under different limit ability were better able to analyze the performance of products under certain conditions.
The materials used for the experiment were the straw cushion packaging material that prepared with our laboratory experiments , selection rules, straight cube shape, length and breadth specification is 10cm×10cm × 3cm.
Dong: Modern Structural System Reliability Theory and its Application (Science Press, China 2001 )
Jin: International Journal of PVP, Vol. 76(1999) No.6, pp. 379-385