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Numerical Simulation of Indoor Airflow and Poison Gas Diffusion in Air-Conditioning Buildings with Large Space Peng Xiaoyonga, Wan Fenb, Xie Jingfangc ,Yao Lind, Liu Zhenhaoe School of Urban Construction, University of South China, Hengyang, Hunan, 421001, China apengxiaoyong@126.com, bjhwanfen@163.com, c123jingfang321@163.com, d110yaolin@163.com, e15211475883@163.com Key words: Large Space Buildings; Air Distribution; Poison Gas Diffusion; Numerical Simulation Abstract.
Considering the harm of the biochemical terror to person in buildings, American LBNL (Lawrence Berkeley National Lab) has done a lot of work on biochemical material properties, influence of internal security made by indoor and outdoor terrorist poison gas, and the numerical simulation and experimental research about poison gas diffusion and transmission in large space building [1-4].
According to the engineering practice, supply air volume chooses 40m3/(m2h), fresh air rate chooses 0.3.
Therefore, when the emergencies of poison gas happen in the public large space buildings installed the central air conditioning system, discovering poison gas and closing central air conditioning air system is the key to preventing and reducing poison gas harm in time.

Seismic Performance of Masonry Infilled RC Structures Via N2 Pushover Assessment Procedures: Outcomes Under Different Modeling Hypotheses of a Case Study CAVALERI Liborio1,a, DI TRAPANI Fabio1,b* and PAPIA Maurizio1,c 1 Department of Civil, Environmental, Aerospace and Materials Engineering.
Fossetti, Infilled frames: developments in the evaluation of the stiffening effect of infills, Structural engineering and mechanics, Vol. 16, No. 6, 2003, pp. 675-93
Mollaioli, Strength and Stiffness Reduction Factors for Infilled Frames with Openings, Earthquake Engineering and Engineering Vibrations 13-3 (2014) 437–54
Di Trapani, Prediction of the additional shear action on frame members due to infills, Bulletin of Earthquake Engineering, 13-5 (2015) 1425-1454
Di Trapani, Cyclic response of masonry infilled RC frames: Experimental results and simplified modeling, Soil Dynamics and Earthquake Engineering, 65 (2014) 224–242

Study on the Maximum Contact Stress of Involute Gear Pair with a Small Number of Teeth LIU Yanfeng1,a, SUN Yuehai1,2,b , SUN Qiang1,c and XIAO Jing1,d 1 School of Mechanical Engineering, Tianjin University, Tianjin, 300072, PR China 2 Engineering Research Center of Light-duty Power Machine of Ministry of Education, Tianjin University, Tianjin, 300072, PR China ajxliuyanfeng@163.com,byuehaisun@tju.edu.cn,csunqiang1216@sina.cn,dxiaojingaz@126.com Key words: Involute gear pair with a small number of teeth, Contact strength, Contact ratio, Precalculated position of contact stress Abstract.
As shown in Table 2, both gears are made of the same material 20CrMnTi; its modulus of elasticity is 207GPa; its Poisson's ratio is 0.25; its allowable contact stress is 1200MPa; and the load per unit of contact line is 4N/mm.
Zhang: Mechanical Engineer, (2010) No.10, p.15.

Logistic of Building Simulation Model of Healthcare Facility For Further Performance Management – Case Study Daniela Onofrejová1,a, Jozef Kováč2,b, Jaroslava Janeková3,c 1, 2, 3Technical University of Kosice, Faculty of Mechanical Engineering, Department of Industrial Engineering and Management, B.Nemcovej 32, 042 00 Kosice, Slovakia adaniela.onofrejova@tuke.sk, bjozef.kovac@tuke.sk, cjaroslava.janekova@tuke.sk Keywords: logistic, simulation model, process model, healthcare facility.
Simulation models of Healthcare Services, and generally services, can be considered as innovative procedures and till lately were not as widely described as for example typical material flow in manufacture.
Key operations are, as follows: • examination by doctor (setting a diagnosis and medical procedures) • completing the therapy (usually 7 repetitions of the same rehabilitation procedure) • final examination by doctor.
Basic predefined elements in applied version of system WITNESS Manufacturing Performance Edition 2007 are being used for building the simulation environment for machine engineering manufacturing plant.

These porous substances attract substantial interest among researchers in chemistry, chemical engineering, and materials science to find novel porous stuff with improved properties and applications.
Li, (2021) An Overview of Metal–Organic Frameworks for Green Chemical Engineering.
Engineering 7 (2021) 1115–1139. https://doi.org/10.1016/j.eng.2021.07.001
Materials, 15, 7591
Yu, (2020) Sodium/ potassium-ion batteries: boosting the rate capability and cycle life by combining morphology, defect and structure engineering.

An, Asymptotic approach to size effect on fracture toughness and fracture energy of composites, Engineering Fracture Mechanics, 5 (2002) 555-564
Wittnann, Size effect on fracture resistance and fracture energy of concrete, Materials and structures, 36 (2003) 74-80
Chen, Experimental study on fracture of roller compacted concrete, Journal of Hydraulic Engineering, 5 (2001) 45-49
Song, Experimental study on cracking of induced joints in RCC arch dam, Journal of Hydraulic Engineering, 5 (2004) 99-105
Wittamnn, Size effect on toughness induced by crack close to free surface, Engineering Fracture Mechanics, 2 (2000) 209-221

Residual Thermo-creep Deformation of Copper Interconnects by Phase-shifting SEM Moiré Method Qinghua Wang a, Huimin Xie a1, Zhenxing Hu a, Jing Zhang b, Jun Sun b, Gang Liu b a AML, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China c School of Materials Science and Engineering, Xi’an Jiaotong University, Xi’an 710049, China 1xiehm@mail.tsinghua.edu.cn, Key words: thermo-creep deformation, copper interconnects, grating, random phase-shifting, SEM moiré Abstract: The thermo-creep deformation of interconnects related to the residual stress, directly affects their performance and lifetime.
Optics and Lasers in Engineering. 2010, 48(11): 1113-1118
Optical Engineering. 1982, 1: 427-431
Optical Engineering. 1993, 32(2): 522
Optics and Lasers in Engineering. 2004, 41(5): 755–765

Behavior of square hollow section steel tubes filled with concrete under different loading conditions Jin Tiande 1,a, Guo Lanhui 2,b 1 Architectural & Civil Engineering Design Institute CO.LTD,Hangzhou, 310001, China 2 School of Civil Engineering, Harbin Institute of Technology, Harbin, 150090, China a jin_td@163.com, b guolanhui@hit.edu.cn Keywords: square hollow section (SHS); loading conditions; concrete-filled Abstract.
Recently, the use of concrete-filled square hollow section (SHS) tubes has become increasingly popular in civil engineering structures.
School of civil Engineering, University of Sydney, Australia, No.
Journal of Structural Engineering, Vol.128, No.8 (2002), pp.1073-1081
Engineering Mechanics, Vol. 25, No.9 (2008), pp. 143-148 [10] T.

Xu, S control of automatic underwater vehicles, The Ocean Engineering, 2001, 19(3): 81-84
Lv, Intelligent Motion Control of Autonomous Underwater Vehicle, Harbin: Harbin Engineering University, 2008: 24-35
Shein, Fuzzy logic control of an autonomous underwater vehicle, Control Engineering Practice, 1994, 2(2): 321-331
Pang, Simulation of fuzzy self-turning PID control based on simulink, in Proceedings of 2011 Applied Mechanics and Materials, 2011: 1644-1649
Xiang, Research on Modeling and Simulation of a Long-Endurance Underwater Vehicle, Harbin: Harbin Engineering University,2009: 51-63.

Attachment lugs are one of the most fatigue-and fracture-critical components in modern engineering structures [1].
Engineering Failure Analysis.
Engineering Fracture Mechanics.
Engineering Fracture Mechanics.
[10] Gao Qing: Engineering Crack Mechanics (Chongqing University Publications, China 1986)