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China e-mail:zw5793@163.com Keywords : 2D cutting-stock; Triangle rectangle method; utilization of raw materials.
The goal of 2D irregular cutting-stock problems is to make the remaining materials reduce to a minimum in the cutting process, making the maximum utilization of raw materials.
So we have to make them regular and improve the utilization of raw materials.
Beijing: Bulletin of science and technology (2007) [4] Bischoff E.
European Journal of Operational Research (1995)

ACE Inhibitory, Antitumor and Antioxidant activities of Submerged Culture Materials of Three Medicinal Mushrooms Xiu-Jun Gao1a, Pei-Sheng Yan1b*, Jian-Bing Wang1c, JiaJia Yu1d 1School of the Ocean, Harbin Institute of Technology at Weihai, West culture road 2, Weihai, Shandong 264209, China asxlinlu2003@yahoo.com.cn, bpsyan6@hotmail.com, cwjb0807401@126.com, d471353412@qq.com, *corresponding author, Keywords: Fermented materials, ACE inhibitory activity, antitumor, antioxidant, medicinal mushrooms Abstract.
Antitumor, antioxidant and ACE inhibitory activities in vitro of liquid fermentation materials from Ramaria botrytoides, Lyophyllum decastes and Mycoleptodonoides aitchisonii were investigated in this study.
Water extracts from fermented mycelia and supernatant materials were used to measure their antitumor effect by MTT assay, antioxidant capacity by kit, and ACE inhibitory activity by RP-HPLC.
Therefore, antitumor, antioxidant and ACE inhibitory activities of liquid fermented materials of Ramaria botrytoides, Mycoleptodonoides aitchisonii and Lyophyllum decastes were investegated in this paper.
Materials and Methods Fungal specie and fermentative culture.

Analysis on supporting performance of the high-water material filling body in the gob-side entry retaining of thin coal seam Zhongping Guo1, a, Daozhi Chen1,b, Feng Guo1,c and Yan Wang1,d 1College of Resources and Environmental Engineering, Shandong University of Science and Technology, Qingdao, Shandong, 266590, China agzp57046@126.com, bdaozhi835@163.com, cskdckgf@163.com,dwystyler@163.com Keywords: Thin coal seam; High-water material; Filling body; Supporting performance.
While, the method of roadside packing with high-water material[2] has the characteristics of high initial strength, simple process and fast filling speed.
Conclusions (1)The deformation of the backfill with high-water material can be divided into 4 stages.
(In Chinese) [2]Guangming Feng, Chengzhen Wang and Fengkai Li: Journal of Mining & Safety Engineering (2011).
(In Chinese) [3] Yanli Huang, Jixiong Zhang and Feng Ju: Journal of Xi’an University of Science And Technology (2009).

Most studies on the erosion mechanisms for ductile materials are derived from Finnie’s micro cutting model [4].
Computational Model This study is based on single impact on ductile materials by micro-particles.
International Journal of Mechanical Sciences, 19 (1977) 45-52
Wierzbicki, On fracture locus in the equivalent strain and stress triaxiality space, International Journal of Mechanical Sciences, 46 (1) (2004) 81-98
Wang, Particle velocity models for ultra-high pressure abrasive waterjets, Journal of Materials Processing Technology, 209 (9) (2009) 4573-4577

Lots of literatures have recorded the hydrophobic modification of TiO2 nano-materials.
The super-hydrophobic surface has a very important application prospect in the self-cleaning materials, microfluidic devices, biological materials and many other felids.
And the modified surface has a better photocatalytic performance to the hydrophobic materials.
Li Jian，Luo Jia，Preparation and Characterization of TiO2 Nanotube Arrays by Anodic Oxidation Method[N],Journal of Inorganic Materials，2010，490-494
[15].Hu Xuebin, Xu Xuan，Preparation and Catalytic Kinetic of Hydrophobic Photocatalytic Catalysts, Journal of Inorganic Materials，2009，1115-1120

SEM analysis of non-conducting materials under low vacuum conditions ZHIGANG Wang 1a,*, KEGAO Liu1b,*, MIN Jing1c, BO Pang2d 1School of Materials Science and Engineering, Shandong Jianzhu University, Fengming Road, Jinan 250101, China 2School of mechanical and electrical engineering, Shandong Jianzhu University, Fengming Road, Jinan 250101, China awzgsdu@126.com, bliukg163@163.com, cjingmin@sdjzu.edu.cn, dpangbo_01@163.com *Corresponding author Keywords: Low vacuum; SEM; EDS; Resolustion Abstract: The surface morphology of the non-conducting granular materials was analysis by SEM under low vacuum conditions.
Mugnier: Journal of Microscopy.
Thiel: Journal of Microscopy.
Donald: Journal of Microscopy.
Ducman: Materials Characterization.

Understanding the thermal performance of fins with different materials and geometries can also guide the development of new materials and composite structures designed specifically for thermal management applications.
By incorporating materials science with thermal engineering principles, it is possible to innovate new solutions that enhance the efficiency, reliability, and sustainability of thermal systems across a wide range of industries.
Stainless steel fins have the poorest heat conduction among the materials studied.
Lukiyanto, “Characteristics of Straight trapezoidal Cross-Sectional Fins under Unsteady Conditions,” International Journal of Applied Sciences and Smart Technologies, vol. 6, no. 1, pp. 161-168, 2024
Seen, “The efficiency and effectiveness of fins made from two different materials in unsteady-state,” Journal of Physics: Conference Series, vol. 1511, no. 1, 2020

Witte, Biodegradable metals, Materials Science and Engineering: R: Reports 77 (2014) 1-34
Antoniac, The influence of the magnesium powder used as reinforcement material on the properties of some collagen based composite biomaterials, Journal of Optoelectronics and Advanced Materials 15 (2013) 667-672
Kamel, In vitro electrochemical properties of biodegradable ZrO2-CaO coated MgCa alloy using atmospheric plasma spraying, Journal of Optoelectronics and Advanced Materials 17(7-8) (2015) 1186-1192
Rosso, Structural characterization of a new cobalt alloy for dental applications, Journal of Optoelectronics and Advanced Materials 15(7-8) (2013) 911-917
Elahinia, Microstructural, mechanical and corrosion characteristics of heat-treated Mg-1.2Zn-0.5Ca (wt%) alloy for use as resorbable bone fixation material, Journal of the mechanical behavior of biomedical materials 69 (2017) 203–212

So in this article, the stability of this material was studied by aging test, methyl-violet test and gas phase chromatography test.
The results show that gas phase chromatography test is feasible for evaluating the stability of this material, but methyl-violet test is unsuitable.
Feasibility Study of Reapplication of Waste Propellants as Welding Heat Source [C]//Guojun Zhang. 2011 International Conference on Materials Science and Engineering Applications, China. 2011: 96-99
Chinese Journal of Energetic Materials (Hanneng Cailiao), 2004(supplement): 296-298
Chinese Journal of Energetic Materials, 2006, 14(2): 127-128

This paper presents the investigation of composite materials lamination using different materials in the structure of lamination.
An implication of the study in this research showed various behaviour of composite materials with different materials used and it showed a difference phenomenon in comparison to metalic materials.
Basically, a composite material is a combination of materials to produce another material and can be defined as a composite materials structure.
Maleque, Mechanical Properties of Epoxy/Coconut Shell FillerParticle Composites, The Arabian Journal for Sciences and Engineering 28 (2003) 171-181
Houston, Natural Fiber Reinforced Polymer Composite in Automotive Applications, Journal of Material 58 (11) (2006)