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Materials and methods The data used in this study were based on the database of the SCI published by Thomson Reuters Web of Science, Philadelphia, PA, USA.
Articles (27,787) comprised 94.5% of the total production, followed distantly by proceedings papers (3,553; 12.1%), reviews (1,131; 3.8%), meeting abstracts (197; 0.7%) and editorial materials (120; 0.4%).
Besides, the average number of articles per journal rose steadily from 3.7 per journal in 2000 to 5.7 in 2011.
Distribution of output in subject categories and journals.
S.Ho, Global trends in Helicobacter pylori research from 1991 to 2008 analyzed with the Science citation index expanded, European Journal of Gastroenterology and Hepatology.23(2011) 295-301

Introduction The active development of materials science has led to the appearance of new polymer binders types with increased rheological and strength indicators and composite materials based on them.
Environmental impact of food packaging materials: A review of contemporary development from conventional plastics to polylactic acid based materials, Materials. 13(21) (2020) 4994
Safin, Study of the destructive properties of biodegradable wood-filled composite material,Materials Science Forum. 992 (2020) 290-295
Shaikhutdinova, Research of biodegradable wood completed composite materials based on polylactide, Journal of Physics: Conference Series. 1399(4) (2019) 044117
Voronin, Analysis of physico-mechanical properties of composites based on polylactide and thermally modified wood fibers, Materials Science Forum. 870 (2016) 202-206.

Influence of Mischmetal on Performance of Copper Based Electric Contact Materials Zhongquan GUO 1, 2, a, Haoran GENG1, 2, b, * , Bin WANG 1 , Zhaoxi HAO3 and Zhiming WANG 1 1 School of material science, JInan University, Jinan, CHINA 2 School of material science, Shandong University, Jinan, CHINA 3 Jining Mining industry group, Jining, CHINA a guozhongquan@163.com b, *strong-422@163.com Keywords: Electric contact material; Inoxidizability; Electrical conductivity; Non-fusibility.
The table 1 shows the ingredients in sample materials labeled C1~C8.
A correct base intensity of the materials.
Guo: Mechanical engineering materials, 3(2004), p. 7-9 [5] B.G.
Guo: Journal of Rare Earth, S3 (2005), p.377-382 [6] Q.L.

Damage Analysis for Quasi-Birttle Materials of CT Image under Uniaxial Compression Cheng Yi 1, a, Hongguang Zhu 2, b, Lizhen Liu 3, c 1, 2, 3 State Key Laboratory of Coal Resources and Safe Mining, CUMT, Beijing, China, 100083 ayicheng312@tom.com.cn, buu_gr@qq.com, c 360268617@qq.com Keywords: Damage ; CT(Computerized Tomography); Rd index; quasi-brittle; materials Abstract.
In the damage research before on the CT image of quasi-brittle materials such as concrete, the damage evolution is often described by the change of average CT values or image threshold segmentation method.
But for the brittle materials, it is difficulty to distinguish the internal damage from the CT information before macro-cracks appear.
Vol. 313 (1999),P.293 [4] Lawer J S, Keane D, Shah S P :ACI Materials Journal.
Vol.202(2006),P.21 (In Chinese) [12] Fen Li, Zhida Li, Junan Gong:Natural Science Journal Of Xiangtan University.

The article deals with testing materials for using in enthalpy exchangers.
Zhang, Membrane-based Enthalpy Exchanger: material considerations and clarification of moisture resistance, Journal of Membrane Science 189 (2001) 179–191 [5] E.
Zhang, Evaluation of moisture diffusivity in hydrophilic polymer membranes: A new approach, Journal of Membrane Science 269 (2006) 75–83 [9] L.Z.
Pei, Heat and moisture transfer in application scale parallel-plates enthalpy exchangers with novel membrane materials, Journal of Membrane Science 325 (2008) 672–682 [10] ASTM: E96. 2000.
American Standard Test Methods for Water Vapor Transmission of Materials, American Society for Testing and Materials, 842-849 [11] P.

Ductile-regime Machining for Fast Tool Servo Diamond Turning of Micro-structured Surfaces on Brittle Materials De Ping Yu1, a, Yoke San Wong 2, b and Geok Soon Hong 2, c 1Sichuan University, School of Manufacturing Science and Engineering, China, 610065 2National University of Singapore, Department of Mechanical Engineering, Singapore, 119260 awilliamydp@yahoo.com.cn, bmpewys@nus.edu.sg, cmpehgs@nus.edu.sg Keywords: ductile-regime machining; fast tool servo; diamond turning; micro-structured surfaces; brittle materials Abstract.
Nevertheless, it is challenging to machine micro-structured surfaces with a mirror surface on the brittle materials due to the low fracture toughness of the materials and the complex shapes of the surfaces.
Ogura and Okazaki used FTS diamond turning to machine micro-lens array on brittle materials [10].
The value of tc can be estimated by Bifano’s model [17] for typical brittle materials using Eq
Hong: Key Engineering Materials Vol. 443 (2010), p. 669-674 [13] D.P.

Science and Engineering of Composite Materials, 23(2016): 453-460
International Journal of Mechanical Sciences, 122(2017): 1-17
International Journal of Mechanical Sciences, 110(2016): 160-169
Analysis of thin-walled open-section beams with functionally graded materials.
Materials and Design, 116(2017): 656-665.

Tsiourvas, Optimization of hybrid hyperbranched polymer/ceramic filters for the efficient absorption of polyaromatic hydrocarbons from water, Journal of Membrane Science.311 1-2 (2008) 128-135
Khalid, Porous hydroxyapatite for artificial bone applications, Science and Technology of Advanced Materials. 8 1-2 (2007) 116-123
Yamada, Application of the powder of porous titanium carbide ceramic to a reusable adsorbent for environmental pollutants, Journal of Hazadous Materials. 185 2-3 (2011) 725-731
Wright, Progress in carbon dioxide separation and capture: A review, Journal of Environmental Sciences. 20 (2008) 14-27
Moutsatsou, Comparative uptake of toxic elements from aqueous media by the different particle-size-fractions of fly ash, Journal of Hazadous Materials. 183 (2010) 787-792

Research on Optimization of the Process Parameters of Bio-packaging Materials by Response Surface Method Xiankui Zeng1,2a, Shuai An2,b, Chuansheng Wang1,2c, and Huiguang Bian1,2d 1Shandong Provincial Key Laboratory of Polymer Material Advanced Manufacturing Technology Qingdao University of Science & Technology, China 2College of Electromechanical Engineering, Qingdao University of Science & Technology, Qingdao, 266061, Shandong, China azxk1967@163.com,banshuai4125@163.com ,cwcsmta@qust.edu.cn , dbianhuiguang@126.com Keyword: biodegradable material, process parameters,response surface method Abstract.
Introduction Recycled bio-packaging materials are a kind of biodegradable material developing rapidly in recent years.
Research and applications of this kind of good environmental recycled materials have become the development trend of the packaging industry in the 21st century [1,2].
The twin-screw extruder has two intermeshing screw rotating in the machine barrel, materials pass forward with the rotation of the screw conveyor, materials pass by the solid conveying, shearing, extrusion, melt transfer finally die extrusion through the mouth.
Experiments Materials and Equipments.

Composite materials exhibit little or no yielding before failure.
Yates: Fatigue & Fracture of Engineering Materials & Structures Vol. 19 (1996), p. 523-528
Leonhardt, Journal of Composite Materials, ASTM STP 749 K.T Kedward, Ed., American Society for Testing and Materials, 1981, pp 117 – 130 [13] J Eshelby, (1956).
Soni, Journal of Composite Materials, ASTM STP 749 K.T.
,American Society for Testing and Materials, 1982 pp 145 - 164