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Among the possible disasters, fire is the greatest threat to people's lives and property owing to its random occurrence and low controllability.
In mechanical smoke extraction system, exhaust vents disposition and exhaust velocity will affect smoke spread [1~3].
Mechanical Ventilation System The subway station is a two-layer island type station.
The mechanical ventilation system will change into smoke exhausting system when fire happens.
Conclusions In the case studied, temperature and poisonous gas have little influence on safe evacuation of passengers, and visibility is the main factor.

Effect of measurement temperature on electroluminescence properties of PET Films Jiaqi Lin1, a, Minghui Xia1,b, Junhui Shi1,c, Jing Leng1,d, Qingguo Chi1,e 1 School of Applied Science, Harbin University of Science and Technology, Harbin, 150080, China aljqi405@163.com, bcarbon111@163.com, csjh-004@163.com, dlengjinghappy@126.com, eqgchi@163.com Keywords: Temperature; PET; Electroluminescence; Hot electron Abstract.
Introduction Poly (ethylene terephthalate)-PET is one of the most important composite material at present, it not only exhibits excellent wear resistance, heat resistance and chemical resistance, but also has high electrical insulation and good mechanical intensity.
The electrical aging and breakdown of poly involve many factors, such as the impurities, structure, chemical defects and change of temperature, etc[2].
In this experiment, the hot electron theory can explain why the EL intensity varies with temperature, with the temperature increasing, it could increase the probability of formation of hot electrons, thus affecting the EL intensity, but little change in the pre-breakdown field indicating that The formation of hot electron is not the main reason which cause aging and breakdown of PET films.

Rangan, Factors Influencing the Compressive Strength of Fly Ash-Based Geopolymer Concrete, Civil Engineering Dimension, Vol. 6, No. 2, 88–93, September 2004, ISSN 1410-9530
Rice husk ash and fly ash effects on the mechanical properties of concrete. 
Effect of Sugarcane Bagasse Ash and Lime Stone Fines on the Mechanical Properties of Concrete. 
Enhancement of the mechanical properties of lightweight oil palm shell concrete using rice husk ash and manufactured sand.
Rice husk ash concrete: the effect of RHA average particle size on mechanical properties and drying shrinkage.

Fig.2 Thrust force exerted on a 0.3mm drill during a drilling cycle (vf =40 mm/s, n=145 krpm, vr=300 mm/s) 3.2 Factors affecting thrust force 3.2.1 Materials of PCB Figure 2 and Figure 3 show that thrust force on copper foil is much larger than that on epoxy glass fiber cloth.
This may improve the cutting environment and the machine property of the drill.
Fig. 11 Influence of thrust force on the accuracy of hole location 4 Conclusions In order to study the factors affecting the thrust force in PCB drilling, a series of experiments is done.
Drilling of printed circuit boards: factors limiting the use of smaller drill sizes[J].
Factors affecting the machinability of GFR/eposy composites[J].

The assessment of crack resistance is done using the stress intensity and crack width factors.
These factors will increase the accuracy of the tests as well as reduce their labor intensity.
Croccolo, Adhesives: Mechanical properties, technologies and economic importance, New York, Nova Science Publishers Inc, 2014
Liu, Determining stress intensity factors of composites using crack opening displacement, Composite Structures, 81 Issue 2 (2007) 614–621
Khansari, Investigation of composite coating effectiveness on stress intensity factors of cracked composite pressure vessels, Journal of Mechanical Science and Technology, 30 Issue 7 (2016) 3119–3126

The most important mechanical properties in the stent implantation are surface roughness, either after the manufacturing process or during stent deployment.
Standard tensile testing is a robust method to reveal the mechanical property of metal.
In can be inferred from those correlations that the surface treatment and cutting orientation generally tend to affect the mechanical property of the material.
In the case of bare specimen, cutting orientation obviously affected the tensile property of the material and presented anisotropic properties of the material after sheet metal forming.
The results show some agreement to prior studies, namely the anisotropic properties that are found for sheet-type 316L stainless steel.

The local similarity of numerical value properties is calculated using the Eq. 1
(1) Where, sim(x, y) is the local similarity, x and y are the values of properties.
The local similarity of fuzzy logic value properties is calculated using the Eq. 2.
(3) Where, M is the largest value of the properties.
The result is the parameters that take into account all the existing restrictive factors.

Grinding force of dynamic variation affects the grinding depth of hardened layer distribution.
Through grinding arc temperature analysis and deformation analysis, the influence factor for grinding arc temperature and workpiece deformation on grinding force is analyzed.
Grinding temperature causes the workpiece convex distortion that affects the workpiece heat uneven [7, 8], leading to the uneven grinding hardening layer.
Material properties corresponding each interval temperature are input into plane grinding force prediction model, and the grinding force of each interval under the influence of the grinding arc temperature is calculated, then the sum total of grinding force is get.
[3] Zarudi I, Zhang L C, Mechanical property improvement of quenchable steel by grinding [J], Journal of Materials Science, 2002, 37(18): 3935-3943

Machining of these materials with the use of traditional machining techniques are becoming difficult task, because, of its high strength, stiffness, high hardness properties.
The concept of orthogonal array of experiments in Taguchi method useful to determine the factors which most affect product quality with a minimum number of experiments, thus saving time and resources [13].
The experimental runs have been conducted on WEDM using L16 orthogonal array of Taguchi method with four factors four levels each.
The parameter wire feed (B) do not affecting surface roughness at 95% confidence levels as its P value if more than 0.05.
From the AS/N table, it is found that voltage gap (A), pulse on time (C) and pulse off time (D) are significant factors for surface roughness b.

The properties of materials at this scale can be very different from conventional materials.
These factors can change or enhance properties, such as strength, reactivity and electrical characteristics [1].
Nanotechnology may also be useful in encapsulation systems for protection against environmental factors.
Plant Disease Diagnostics Diseases are one of the major factors limiting crop productivity.
Voilley, Factors affecting the moisture permeability of lipid-based edible films: A review, Crit.