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Online since: September 2013
Authors: Jian Shu Hou
Percentage passing / % Fig.3 Particle size distribution curves for different soil types But it is difficult to take the soil samples home if there have large numbers of big particles.
To find the area of the particles use dot notation to access the area field element of grain data structure array to get the actual number of pixels of the particles.
Online since: October 2014
Authors: Jana Kukutschová, Darja Kubečková, Hana Doležalová, Veronika Kučeriková
Table 1: The residential panel housing and type of biotic attack Description of apartment house and the number of sample The thickness of the insulating ETICS [mm] The orientation of the external walls for sampling Biotic attack – a genus of microorganism Algae Clorophycae Cyanobacterium Chroococcidiops Fungal spores Alternaria Fungal tyfy (without detecting) Apartment buildings B1-B4 Locality A 1-5 100 The north wall x - - - 6-10 100 The west wall x x - - Apartment buildings B5-B8 Locality B 11-15 120 The north wall x x x x 16-20 120 The south wall x - - - Apartment buildings B9-B12 Locality C 21-25 120 The north wall x x x x 26-30 100 The west wall x x x x 31-35 100 The south wall x x x - Apartment buildings B13-B16 Locality D 36-40 100 The north wall x x x x Apartment buildings B17-B20 Locality E 41-45 100 The north wall x - x x 46-50 100 The west wall x x x x Northwest West East North Southeast South Southwest Northeast Figure 1 and
Results and discussion Although it is a relatively small sample of sites and the number of prefabricated apartment buildings, that the issue of the biotic infestation of the facades of the outer walls of prefabricated houses is closely related to the phenomena of building physics [8], so how to declare the results of the foreign studies.
For example, if we are going to characterize the genus Rotifers (Rotifera), so this is about a tribe of invertebrates animal that lives in the wild in the open water of plankton in lakes and ponds, in waters polluted, in moist soil, drying moss, between the grains of sand, it is also in mine shafts; females and males live separately or create colonies [9].
Online since: August 2013
Authors: Ying Hao Wang, Yu Qin Feng, Shuo Li
The compactness and structure of the soil can be improved and the bearing capacity can be increased. 4, drainage effect of the pile body: At the primary stage of pile, because the coarse grain is filled in pile hole and surrounding, it forms the vertical drainage and decompression channel, it make the water upward along the pile body.
According to "Technical code for testing of building foundation piles" JGJ106-2003, J256-2003 and "Specification for low strain dynamic testing of piles" JGJ/T93-95, 1010 CFG plies were tested, accounting for the total pile number 10%. 910 of them belonged class I and the proportion was 90.1%; 76 of them belonged class II and the proportion was 7.5%; 28 of them belonged class III and the proportion was 2.4%.
Table 2 Result of Static Load Text Pile number Deformation modulus (Mpa) Compression modulus (Mpa) Termination load (kPa) Accumulative total settlement (mm) Bearing capacity characteristic value(kPa) 3-10 42.28 33 900 27.19 450 13-11 46.77 37 900 24.26 450 4-30 36.41 29 900 32.55 450 11-27 46.09 36 900 25.54 450 3-48 43.14 34 900 26.39 450 Conclusion The bearing capacity of composite foundation after treatment of this project has increased by 1.8 times than that of natural foundation; the compression modulus met the design requirements.
Online since: October 2014
Authors: Fan Zhang, Zhan Jie Wang
In the synthesis of PZT powders, the lower temperature leads to slower crystal nucleus formation rate, that is, less formation number of crystal nucleus per unit time.
Due to the formation of crystal nucleus requires a long time, the grain sizes of crystals formed by previous crystal nucleus growth are bigger, and those of the later formed crystal nucleus are smaller.
With the increasing of temperature(200oC), the number of crystal nucleus formation of powder per unit time rapidly increased and particle size also gradually reduced (100 nm).
Online since: June 2012
Authors: Qing Li Ren, Qiang Luo
The density of states of each primitive cell by definition is equal to the results that the number of lattice wave mode is divided by the number of the total of the primitive cells.
Chen, Mechanism of grain growth about Mg(OH)2 under thermal liquid condition, Rare Metal Materials Science and Engineering. (2004) 1-4.
Online since: November 2013
Authors: Siegfried Schmauder, Vera Petrova
A bimaterial is composed of an FGM (denoted by number 1) and a homogeneous material (denoted by number 2).
It was assumed that all internal cracks in the FGM have the same size 2ak = 2a (k = 1, 2, ... , N), for example, they have the characteristic size of the grain size of the material.
Online since: April 2012
Authors: Xian Jun Li, Yi Qiang Wu, Xin Gong Li, Zhi Cheng Xue, Nan Hu
The decorative effect of laminate flooring was poor; especially its decoration layer was printed wood grain paper which lacked three-dimensional decorative effect and layering [6].
Fig. 1 Experiment technology flow chart Fig.2 Curve of hot-pressing Table 1 Hot-pressing process orthogonal test scheme Test Number Hot-pressing Temperature [℃] Hot-pressing Pressure [Mpa] Hot-pressing Time [s/mm] 1 160 3 30 2 160 4 40 3 160 5 50 4 170 3 40 5 170 4 50 6 170 5 30 7 180 3 50 8 180 4 30 9 180 5 40 Experimental Results and Analysis After testing and statistics, the average values of wear value, surface bond strength and dipping peeling degree of the thin bamboo veneer consolidated composite floor were listed in table 2.
Table 2 Test result of mechanical properties Test Number Wear Value [mg/100r] Surface Bond Strength [Mpa] Dipping Peeling Degree [mm] 1 0.0124 1.453 26 2 0.0102 1.621 20 3 0.0110 1.608 22 4 0.0087 2.508 16 5 0.0101 2.334 14 6 0.0090 2.479 13 7 0.0068 1.883 31 8 0.0059 2.610 12 9 0.0057 1.891 15 Table 3 Wear resistance variance analysis Source of Variance Square of Deviance Degrees of Freedom Average of Square of Deviance Value of F Critical Value of F Significance A 3.7×10-5 2 1.85×10-5 30.8 F0.10(2,2)=9.00 F0.05(2,2)=19.00 ** B 1.2×10-5 2 0.6×10-5 10 * C 0.1×10-5 2 0.05×10-5 0.8 No Error 1.2×10-5 2 0.6×10-5 Sum 6.2×10-5 8 Table 4 Surface bond strength variance analysis Source of Variance Square of Deviance Degrees of Freedom Average of Square of Deviance Value of F Critical Value of F Significance A 1.05 2 0.525 42 F0.10(2,2)=9.00 F0.05(2,2)=19.00 ** B 0.15 2 0.075 6 No C 0.05 2 0.025 2 No Error 0.25 2 0.0125 Sum 1.5 8 Table 5 Dipping peeling variance
Online since: October 2007
Authors: Zeno Spârchez
A2 - on the powder mass: • apparent density; • tap density; • fluidity of the mixture components; • mean grain size of the particles.
Parameters depending on the processing • sliding friction and rolling friction coefficients between the powder' material and the separation surface ' material; • value of slope angle of the separation surface with respect to a horizontal plan; • minimum rotundity degree of spherical particles separated; the separation method; • separation device feeding method with powder; • powder feeding ratio (the distance between the powder particles during the separation process); • separation process time; • number of successively separation processes made on the powder; • linear speed and rotation speed of the separation surface; • tilting angle of the drum axe related to a horizontal plane (separation device with conic drum); • amplitude, frequency and oscillations' shape of the separation surface (for vibrating separation).
( ) ( ) = α + ⋅π = αδ+ π =δ=δ sinkdd4 d sind4 d f 2 pp 2 p 2 p 2 p ( ) = α+ ⋅π sink1d4 d 2 2 p 2 p ( ) α+ π sink14 2 (3) The number np of the particles situated at the distance δ and that corresponds to a unit separation surface (for example 1 cm2) is calculated according the equation (4)
Online since: October 2009
Authors: Jaroslav Polák, Martin Petrenec
Figure 3 shows the plot of the plastic strain amplitude vs. the number of loading cycles and Fig. 4 the plot of the mean strain vs. the number of loading cycles for selected values of the mean stress.
The study of the fatigue crack initiation in cycling with positive mean stress revealed that fatigue cracks start in persistent slip markings developed in the grains of pro-eutectoide ferrite (Fig. 7).
Online since: August 2009
Authors: N.K. Tolochko, Yu.A. Shienok, A.A. Andrushevich
That is why only limited number of alloys (such as Al-Si-Mg systems an others) having a wide solidus - liquidus range is used in these methods [6].
As a result, due to limited number of materials used in conventional semisolid casting it is impossible to vary their properties over a wide range.
Therefore, it is rather difficult to create the ingot with required fine-grained structure.
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