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To fulfill a particular objective to improve indoor air quality, fig.2 illustrates the engineering controls to eliminate airborne contaminants in isolation rooms[24]–[26].
Engineering Controls · Ventilation: - consists of three parts: · Filtration
Pasanen, “Indoor air-related symptoms and volatile organic compounds in materials and air in the hospital environment,” Int J Environ Health Res, vol. 29, no. 5, pp. 479–488, Sep. 2019, doi: 10.1080/09603123.2018.1550194
Yuan et al., “Thermal comfort in hospital buildings – A literature review,” Journal of Building Engineering, vol. 45.
Garcia, “Engineering Controls, Work Practices, and Exposure Monitoring for Occupational Exposures to Diacetyl and 2,3-Pentanedione.”

Zan State Key Lab of New Ceramics and Fine Processing, Department of Materials Science & Engineering, Tsinghua University, 100084 Beijing, China, email: hy-dms@mail.tsinghua.edu.cn Keywords: Silicon nitride, Laminated ceramic composites, Creep, BN interlayer, Sintering aids Abstract.
The creep behaviors of these materials cannot be explained generally by a simple composite creep model based on the bulk properties of the two constituent materials [9, 13].
Therefore, stress relaxation experiments can be used indirectly to characterize creep behaviors of the materials.
Presumably, Tg for the glassy phase in the present (MgO+Al2O3+Y2O3)-doped Si3N4 materials should be below 950∼970°C.
The creep strains in the present materials studied are lower than 0.6% under all the stress levels and temperatures.

Study on Optimal Scheduling Methods of Urban Drainage Pumping Stations Based on Orthogonal Test Jingsen Liu a, Jilin Chengb, Yi Gong c College of Hydraulic Science and Engineering, Yangzhou University No.131 Jiangyang Middle Road,Yangzhou City, Jiangsu Province, China, 225009 aliujs@shsl.org.cn, bjlcheng@yzu.edu.cn, cgongyi_8@163.com Keywords: Orthogonal Test;Pumping Station;Storm Drainage;Optimization Method Abstract.
Two rivers in this region were connected to outside rivers, and the key project of pump and sluice were equipped at the connection point.
River length (m) Riverbed material Bottom width (m) Bottom elevation (m) Side slope coefficient Ordinary water level (m) Highest controlled water level (m) Ground elevation (m) 1 4587 Soil 13.6 0 0.7 2.8 4.4 4.8 2 4820 Soil 22.2 0 1.1 2.8 4.4 4.7 3 2100 Soil 12 0 0.3 2.8 4.4 4.7 4 4630 Soil 20 -0.3 1.1 2.8 4.4 4.7 5 1630 Soil 20 -0.3 1.1 2.8 4.4 5.1 There were 21 rainfall pumping stations built along rivers in this region.
Contributions concerning the power optimization of the pumping stations. 2008 Proceedings of the ASME Fluids Engineering Division Summer Conference[C].USA: American Society of Mechanical Engineers, 2009, v 1, n PART B, p 1097-1105
Journal of Hydraulic Engineering, 1997(3):49~57

Bellucci* Materials and Production Engineering Dept.
Mitton Engineered Surfaces Center University of North dakota (UND) School of Engineering and Mines 243 Centennial Drive Grand Forks, ND 58202 U.S.A.
Key words: 6056-T4, 6056-T78, friction stir welding, aluminium alloy corrosion Abstract The current research has assessed the correlation between welding parameters and corrosion behaviour for friction stir welded 6056 aluminium alloy.
It is an energy efficient solid phase process occuring below the melting point of the material being welded and is a candidate technique for the joining of aircraft structures [2].
Experimental Methods Samples The materials employed during this research included 4 mm thick 6056-T4 aluminium plate and 4 mm FSW joints of aluminium 6056-T78.

Defection Analysis Engineering designers model the bridge and analysis internal force using the software of the structure calculation according to study the defection situation of Huang-Jiayan bridge.
Against to the defection, Engineering designers proposed to strengthen Huang-Jiayan bridge using synthetic technologies of reinforcing tie-beam with steel plate yoke to reinforce the bridge mainly and other conventional technologies of bridge deck load reduction, reinforced concrete box-closed and reinforcement concrete yoke to strengthen the skewback, carbon fiber sheet to strengthen cross-section arch tensile capacity, glass fiber sheet to close the belly bar and scissors-type bar, and so on subsidiarily.
The key parts are abdominal component at the arch foot and nodes of the arch rib.
There are no new added cracks ,the old cracks are not further expansion in and some of the old cracks at the side arch ribs have the closed signs according to the following-up observation of the engineers lately.
[3] Ono K,Matsumura M.Strengthening of reinforced concrete bridge piers by carbon fiber sheet[C] // In: Proc. of International Association for Bridge and Structural Engineering.

Strait Crossing Cable Stayed Bridge Girder Evolution Long Guo1,2,a, Airong Chen1,b and Liping Xu2,c 1Bridge Engineering, Tongji University, China 2Architectural Design & Research Institute of Tongji University (Group) Co., Ltd., China aguolong76@gmail.com, ba.chen@tongji.edu.cn, cxlp@tongji.edu.cn Key words: Girder evolution; Cable stayed; Strait crossing; Traffic Safety; Traffic lane; Railway; Wind effect Abstract.
The paper will introduce several newly evolved kinds of girder that were based on commonly known physic natural law by structural engineer.
As for long span arrangement, a steel material girder might be an advantage since it will be lighter compare to the concrete and composite girder, even the girder investment will be more than the others but a saving in pylon as well as substructure can be achieved.
Sigbjornsson, in: Probabilistic assessment of road vehicle safety in windy environments (Journal of Wind Engineering and Industrial Aerodynamics 95 (2007) 1445-1462)
Cai in: Accident assessment of vehicles on long-span bridges in windy environments (Journal of Wind Engineering and Industrial Aerodynamics 92 (2004) 991-1024).

Fatigue Crack Growth and Precipitation Characteristics of a High Zn-Containing Al-Zn-Mg-Cu Alloy with Various Typical Aging States Kai Wena,*, Hongwei Liub State Key Laboratory of Non-ferrous Metals and Processes, GRINM Group Co., LTD., Beijing 100088, China GRIMAT Engineering Institute Co., LTD., Beijing 101407, China General Research Institute for Nonferrous Metals, Beijing 100088, China awenkai@grinm.com, blhw@grinm.com Keywords: Al-Zn-Mg-Cu alloy; fatigue crack growth; Zinc content; Aging precipitation Abstract.
Acknowledgements This study was financially supported by National Key R&D Program of China (No. 2020YFF0218201), Youth Fund Project of GRINM and Demonstration Platform of Production and Application for High-speed Railway Equipment Materials (No.

In this paper, an attempt has been made to prepare complex materials from biological ingredients.
The resulting new complex molecules are supposed to be supra-molecular / large molecular materials.
Here central interest is with new materials for what it does, rather than what it is.
Conventional solar cells are built from inorganic silicon-like materials.
Sarkar, Materials Science and Engineering.

Thermodynamical Study on Rare Earth L-Isoleucine Chlorate Complexes [RE2(Ile)4(H2O)8](ClO4)6 (RE = Nd, Er) CHEN Chen, WU Xin-Min* and YANG Fan College of Chemical Engineering, Beijing Institute of Petro-chemical Technology, Beijing 102617, P.
China wuxinmin@bipt.edu.cn Key Words: kinetic equation and parameters; [RE2(Ile)4(H2O)8](ClO4)6 (RE = Nd, Er); standard enthalpy of formation Abstract Using perchloric acid, Nd2O3, Er2O3 and L-isoleucine (Ile) as raw materials, two crystalline compounds of rare earth isoleucine chlorate, [Nd2(Ile)4(H2O)8](ClO4)6 and [Er2(Ile)4(H2O)8](ClO4)6, were synthesized.
Medvedev: CODATA Key Values for Thermodynamics; (Hemisphere Publishing Co., New York 1984) [11] D.

Stress Problems at the Steam Drum Fatigue Checking Point of a Supercharged Boiler Zheng Xinwei1,a, Li Zheng2, Chen Xiuhui3, Sun Yu3, Wang Hao3 and WenXueyou1 1 College of Power and Energy Engineering, Harbin Engineering University, Harbin 150001, China 2 Heating Ventilating Constituent Corporation, Beijing Capital Airport Power and Energy Co., Ltd., Beijing 100621, China 3 Offshore Oil Engineering Share-holding Co., Ltd., Tianjin 300452, China azhengxinwei17@126.com Keywords: supercharged boiler; steam drum fatigue checking point; internal pressure stress; radial temperature difference heat stress; heat stress caused by the temerature difference between the top and lowest points on the outside surface of a steam drum; resultant stress Abstract.
Acknowledgment This paper is funded by the International Exchange Program of Harbin Engineering University for Innovation-oriented Talents Cultivation.
Zinin, “Application of Main Marine High-duty Boilers in Stationary Power Engineering”,Teploenergetika, no. 11, 1996, pp. 56-60
Zinin,“Using Main Highly Supercharged Shipboard Boilers in Land-based Power Installations”, Thermal Engineering, vol. 43, no. 11, 1996, pp. 936-40
[12] Chinese Power Engineering Society, Technical Manuals for Thermal Power Equipment, Vol. 1.