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Online since: December 2010
Authors: Wan Sheng Yang, Kai Hua Guo
In paper [2] the author pointed out that the cultivation of soil planted roof can be used in the following, (1) farming soil + (30% ~ 50%) of coarse sands, (2) vermiculite, rock wool or foam, sawdust, grain peat, perlite, coal, peat, etc. mixed with other matrix roof soilless culture, namely farming soil +30% vermiculite or perlite, or farming soil + (30% to 50%) of vermiculite or sawdust,(3) shallow water grass roof + (50 ~ 100)mm ceramic pebbles or coarse sand.
Table 1 Thermal properties of different parameters [7-8] serial number material name Temperature ℃ density thermal conductivity W/(m·K) specific heat J/(kg·K) regenerative factor S(24hour) W/(m·K) thermal diffusivitya×107 1 loess 20 880 0.94 1.17 8.39 9.13 2 sands 12 1420 0.59 1.51 9.59 2.75 3 clay 10 1850 1.41 1.84 18.68 4.14 4 Perlite powder 20 44 0.042 1.59 0.46 6.00 5 Gypsum board 20 1100 0.41 0.84 5.25 4.44 6 Loose rice husk Room temperature 127 0.12 0.75 0.91 12.60 7 Loose sawdust Room temperature 304 0.148 0.75 1.57 6.49 8 Red clay brick 20 1668 0.43 0.75 6.25 3.44 9 Aerated concrete Room temperature 700 0.22 1.05 3.59 2.99 10 Expanded Perlite Room temperature 120 0.07 1.17 0.84 4.99 11 Expanded Vermiculite Room temperature 300 0.14 1.05 1.79 4.44 12 Plus straw clay Room temperature 1400 0.58 1.01 7.69 4.10 Heat transfer analysis Heat transfer model In order to master the heat transfer characteristics of different materials and select correctly the suitable
Online since: October 2013
Authors: Hai Liang Wang, Hai Yang Guo, Xin Lei Yang, Quan Chang Ren, Peng Dong
Coarse aggregate: continuous grading of macadam with a grain diameter between 5-31.5mm.
The number tagged indicates the fiber amount mixed in the concrete, for instances, CB-09 means waterproof concrete mixed with basalt fiber of an amount of 0.9 kg/m³, CB-09 means waterproof concrete mixed with polypropylene fiber of an amount of 0.9 kg/m³, and the rest can be done in the same manner.
Online since: June 2013
Authors: Seong Won Jeong
Each resin maker uses a guideline for rib design [4, 5, 6], but the range of rib thickness(RT), rib height(RH) and the rib-draft angle(RDA)as described in those guidelines is too wide and has no relationship with the surface texture, such as whether it is a high-glossy or a grained surface.
It was decided that BBD was suitable for our specimen because it has fewer design points and it is less expensive to run than a central composite design with the same number of factors considering that a specimen made by an injection mold is costly and time-consuming to produce.
Online since: June 2019
Authors: Thomas Seefeld, Adrian Ditsche
It should be considered that elements with a small atomic number cannot be measured exactly by this method.
Laser remelting of bronze alloys influences the microstructure of the material which depends on the alloy composition as well as the welding speed and has an effect on the grain structure and precipitation of the bronze material [9].
Online since: June 2016
Authors: Roxana Nedelcu, Adinel Gavrus, Daniela Pintilie
On the experimental point of view the fibering or the flow lines obtained from a bulk forming process may be firstly examined at a microscopic scale starting from the observation of privileged deformation directions of the metallic grains followed by a mesoscopic analysis regarding the local plastic flow-lines observed by a specific metallographic attack applied to a chosen section area of the workpiece.
After a large number of numerical simulations performed with the Forge2® software, using a sensitivity analysis and a manual calibration procedure, are obtained the best friction coefficients which permit to closely fit numerically the corresponding experimental outside cylindrical surface defined by the known final specimen diameters D = 60 mm and Df = 65 mm i.e. m = 0.15 and = 0.24.
Online since: May 2013
Authors: Noor Bahyah Ibrahim, Ftema W. Aldbea, Mustafa Hj. Abdullah
The best results obtained from the Tb2.4Y0.6Fe5O12 calcinated at 1400 °C; and the coercivity reduced to a small value due to the grain size increment resulting from high calcinaion temperature.
The obtained results were compared with the Joint Committee on Powder Diffraction Standard (JCPDS-ICDD; number 43-507) for pure YIG.
Online since: August 2016
Authors: Tomasz Sadowski, Grzegorz Ludwik Golewski
Acknowledgement This work was financially supported by Ministry of Science and Higher Education within the statutory research number S/20/2015.
Golewski, Effect of aggregate kind and graining on modeling of plain concrete under compression, Comput.
Online since: July 2012
Authors: X. Zhu, T. Zhang, D. Marchant, V. Morris
In addition, the fracture surfaces of the 5wt% and 15wt% TiC sample show that TiC particles were not only distributed at the NiAl boundary, but also embedded within the NiAl grains, which indicates that NiAl is in a liquid state when TiC is formed.
According the energy conversation, the general combustion synthesis can be expressed as: (1) where ∆H298 is the enthalpy of formation, Cp is the heat capacity, Ri and Pj are the appropriate reactant and products respectively, and Tpre and Tad are the preheating and maximum combustion temperatures, n and m are the numbers of reactants and synthesized products respectively.
Online since: April 2016
Authors: Zbigniew Pater, Tomasz Bulzak, Janusz Tomczak
Titanium alloys have also sufficient plasticity for realization of metal forming processes in cold, which is conditioned by a larger number of possible slide systems in relation to other materials, e. g: magnesium alloys.
The choice of appropriate temperature for the process realization should guarantee obtaining proper plasticity and should not lead to unfavorable changes in material structure, e.g: grain increase.
Online since: October 2023
Authors: Sergio Martín-Béjar, Carolina Bermudo Gamboa, Lorenzo Sevilla Hurtado, Juan Claver
Table 1 displays these numbers.
Pecori, Reusing grain silos from the 1930s in Italy A multi-criteria decision analysis for the case of Arezzo, Journal of Cultural Heritage, 29 (2018) 145–159
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