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Online since: July 2011
Authors: Zong Min Yu, Yi Xiang, Yi Ying Luo, Zhi Rong Niu, Hou Ren Xiong
Study of building structural system for the external thermal insulation technology, many foreign engineers developed dozens of different wall insulation system, such as EIFS(exterior insulation finishing system), in the mid 1980s in China, under the influence of insulation enterprise in foreign countries, the external insulation technology began to research, At present, China prepare the industry standard issued by the recommended industry standard exterior insulation systems: EPS thin plaster external thermal insulation system, insulating mortar consisting of gelatinous powder and EPS pellets insulation system, cast-in-situ concrete composite no nets EPS exterior insulation system, cast-in-situ concrete composite EPS wire rack boards exterior insulation system, mechanical fixed EPS steel mesh exterior wall insulation system [2].
The temperature change is the same in the coating system with the internal surface of the box, while less in the tile system; it means that the properties of materials of finish coat would affect the external insulation system on a certain degree [6, 7].
(2) Under the stage of heat- rain cycles, during the sprinkler the cooling influence of the tile system and the coating system is greater than the heating influence, which indicates the temperature difference between layers was less affected by external temperature ,and the time when the external temperature arrived to the interface layer is shorter.
This shows environment of the weather fastness box is complex under the stage of hot-cold cycles, which is influenced by factors such as low radiation and cold air convection.
Online since: October 2014
Authors: Chun Yang Yi, Zhao Quan Cai, Chang Wen Dong, Wei Shi, Jia Xiang Xue, Tian Fa Liao
School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, China. 2.
Moreover, the shortfall will also lead to the voltage of the bus bar increasing significantly, the overcurrent of inverters, the distortion of the on-grid current, and all of these will greatly affect the quality of the energy seriously.
When the grid voltage recovers to the dead band voltage, the PV on-grid inverter should keep the voltage support for 500ms, which is claimed by the property of LVRT.
The formula of the referential current can be obtained from the inverse transformation of formula (3-4) : (3-5) Regardless of the active oscillating power p2, reactive oscillating power q2,q0=0, the formula(3-5) will transform to (3-6) When the asymmetrical falling happens to the grid, in order to decrease the shaking of the bus bar on DC side and the value of THD of the on-grid current on AC side, the direction of power commutating, the changing of the instantaneous active power and reactive power, the vector of voltage and current on different coordinate systems(static coordinate system, coordinate system, rotating coordinate system, solar coordinate system), all of these factors are needed to be considerate when to calculate the referential current.
(3-11) We introduce correction factor, and the reactive referential current will be obtained (3-12) The analyzing of reactive referential current is the same with active referential current, with the changing of , the percentage of on-grid positive sequence current and the negative sequence current can be adjusted.
Online since: April 2015
Authors: Zakaria Man, Maizatul Shima Shaharun, Rizwan Nasir, Hilmi Mukhtar
., because they have the desired mechanical property and the flexibility to be processed into different modules [2-4].
Moreover, the mixed matrix properties are affected by filler pore size, particle size, loading of filler and polymer properties. [13].
This study demonstrated that the incorporation of 30 wt. % CMS as inorganic filler in PES dope solution increased the permeance of CO2 and selectivity of CO2/CH4 by a factor of 2.3 and 2.2, respectively.
Online since: May 2013
Authors: Chao Xun Zhou, Xiao Feng Xu, Feng Yao
Green construction is a systematic project, which requires the enterprises to establish the idea of sustainable development, modern management and innovation system, to adopt new technologies with better energy saving and environmentally-friendly properties, to achieve construction with high efficiency, environmental protection, and low power consumption, and to enhance the core competitiveness of enterprises.
Other factors leading to the high cost of green construction are the cost incurred in the complexity design which need to integrate green practices into projects, and in the adoption of green technologies which may cause large spent on the new equipment and training for the employees.
Architects pay more attention to the awareness of green construction than project managers, and awareness is evaluated as the fifth importance since it affects the decision making of both strategy makers and consumers.
The scope of incentives should be expanded from developers, building owners, architects and mechanical and electrical consultants to cover the usage of green products and technology which are still very expensive now.
[2] WANG Jiayuan , YUAN Hongping, KANG Xiangping, LU Weisheng, Critical success factors for on-site sorting of construction waste: a China study , Resources Conservation and Recycling. 54 (2010) 931-936
Online since: July 2013
Authors: A Kumar, Somik Banerjee, M. Deka, Udayan De
Thermal spikes, in addition to affecting reaction rates, also generate large pressures in the rapidly heated material within the spike.
Kohno, Effects of ion irradiation on the mechanical properties of several polymers, Int.
LET dependence on the chemical reactions and change of mechanical properties, Nucl.
Heavier ion irradiation effects on mechanical properties of PE and PTFE, Polymer 37 (1996) 3737-3739
Misra, Grafting: a versatile means to modify polymers Techniques, factors and applications, Prog.
Online since: May 2022
Authors: Rosine Coq Germanicus, Kimmo Niskanen, Alain Michez, Niemat Moultif, Wadia Jouha, Olivier Latry, Jerôme Boch, Ulrike Lüders, Antoine D. Touboul
The effects of the SEB in the electrical properties of the MOSFET are established, and the SiC damaged zone is observed by scanning electron microscopy.
All environmental constraints must be considered, and in particular atmospheric radiations representing an intense continuous flux, which have been shown to affect the overall reliability of electronic systems.
The acceleration factor compared to the ground level neutron flux is 109.
Since the device is a packaged commercial component (not a device from a bare die without packaging), and to conserve the back-end structure, the sample preparation has been based on a backside opening, followed by the mechanical grinding of the copper heat spread.
Online since: July 2014
Authors: Wen Bo Wang, Yu Shan Xu, Lin Zhu, Yi Feng Hu, Dong Xi Shi, Qiang Sun
The types, characteristics and application of new building wall materials As for the building structure, the wall is the most important part of building, and it is also the key factors to the performance and service life of building.
Due to the light wall materials are mostly processed using industrial waste, and the physical and mechanical difference in properties such as thermal conductivity, temperature conductivity and the strength, it will produce certain tensile, compressive stress in masonry surface, resulting in the crack of the plaster easily and empty drum.
But it should be uniform, continuous when concreted, or the polystyrene boards may deform because of the effect of the lateral pressure of concrete which will affect the subsequent construction.
It is also not affected by structural quality differences.
Online since: December 2019
Authors: S. Jeyakumar, B.A. Saravanan, Ganesh Gowthaman
Jeyakumar2,b and B.A Saravanan3,c 1Assistant Professor, Department of Mechanical Engineering, PSNACET, Tamil Nadu, India 2Professor, Department of Mechanical Engineering, PSNACET, Tamil Nadu, India 3Professor, Department of Mechanical Engineering, SREC, Tamil Nadu, India apsgowtham36@yahoo.com, bkmk_jai@yahoo.com, cba_saravanan@gmail.com, psgowtham36@yahoo.com* Keywords: Wire Electrical Discharge Machining (WEDM), Dry-process, Process parameters, Applications, Future scope Abstract.
Process parameters affect the output result in the machining. 3.1 Material Removal Rate (MRR) The material removal rate (MRR) is one of the major performance measures to control the mach inability of material.
They optimized the GRA with Fire fly algorithm and using one-time factor approach.
The exhaustive report shows the information feature, factors probable to drive and challenges in the growth market.
[2] Ibrahem Maher, Ahmed A.D Sarhan & M.Hamdi, Review of improvements in wire-electrode properties for longer working time and utilization in wire-EDM machining, Int.
Online since: June 2014
Authors: Rozmarína Dubovská, Jozef Majerik
According to the authors [15, 16, 17, 18], the causes of that trend are especially in improving the strength properties of sheets and development of technologies for hard milling and forming.
Material properties are assigned to the following parts of the 3D model.
Critical areas could be optimized by the change of radius area, as well as changing friction between the forming tool and blanks, alternatively by exchanging material with improved properties.
Gonzáles: Analysis of factors affecting the high-speed side milling of hardened die steels, Journal of Materials Processing Technology Vol. 162-163 (2005), p. 696-701 [23] F.
Balič: Influence of the Milling Strategy on the Durability of Forging Tools, Strojniški vestnik - Journal of Mechanical Engineering Vol. 57 (2011), p. 898-903 [29] C.
Online since: February 2020
Authors: Denisa Valachova, Iveta Skotnicova, Nada Zdrazilova
In terms of building physics are the most significant variables especially boundary conditions, that affect the construction.
Temperature Factor of Structure Internal Surface.
Sufficiently high temperature of structure surface θsi and low relative humidity of the indoor air φi,r are the main factors that ensure the prevention of condensation of water vapor on the surface of structure and thus it precludes subsequent mold growth [9,12].
However, in the case of values characterizing the properties of the internal environment they are significantly influenced by the way of use of the building and design values can differ significantly.
Determination of optimal number of collectors depends on many other factors that can´t be primary taken into account in the calculation.
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