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Online since: December 2016
Authors: Wei Ning, Yi Fei Li
In 2015, the province's total grain output reached 80.37 billion LB.
Straw yield and grain yield are directly proportional.
Acknowledgement The Young start-up funding of Jilin Agricultural University (serial number: 2015046).
Online since: September 2017
Authors: L.G. Znamenskii, O.V. Ivochkina, A.S. Varlamov
The use of refractory filler with the grain size of 30...40 µm determines high sedimentation stability of the paint composition and the required permeability to gases of the model overlayer.
Introduction of the nanostructured diamond powder, whose particles are the centres of crystallization, into the coating enables getting line grain structure of the overlayer of steel and cast-iron mouldings, moreover, it promotes the rise of the surface hardness and strength.
For every composition there was defined the percent of quality castings from their general number.
Online since: May 2011
Authors: Di Tao Niu, Jian Gang Niu, Zhen Zhang
Coarse aggregate: Shanxi Jingyang Town broken stone mass hammer of limestone, grain diameter 5~20mm.
Table 2 Mix proportions of concrete Serial number Dosage per volume [kg/m3] Water-cement ratio Cement Fly ash Sand Stone Admixture B1 385 0 735 1112 7.9 0.44 B2 327 75 730 1130 8 0.42 B3 270 150 725 1087 8.4 0.4 Test Methods Test Loading.
Fig. 2 The loading way of specimen Table 3 Anti-folds strength of specimens and equivalent torque values Serial number Anti-folds strength[Mpa] The bending stress levels 0.2 0.4 0.6 B1 5.175(28d) equivalent torque values[N·m] 5.0 10.0 15.0 B2 5.355(90d) 5.2 10.4 15.6 B3 5.265(90d) 5.1 10.2 15.3 Fig. 3 The specimens attacked by acid rain solution Fig. 4 The specimens dried after erosion Experimental System.
Table 4 Neutralization depths for fly ash concrete under loads[mm] Serial number Erosion time Stress levels 0.0 0.2 0.4 0.6 No-stress Tension area Compressive area Tension area Compressive area Tension area Compressive area B1 20d 0.55 — — 0.63 0.49 — — 40d 0.80 — — 0.92 0.71 — — 60d 0.97 1.00 0.95 1.03 0.91 1.11 0.88 B2 20d 0.57 0.73 0.57 0.74 0.54 0.82 0.48 40d 0.89 0.98 0.84 1.00 0.80 1.02 0.74 60d 1.07 1.12 0.98 1.21 0.91 1.24 0.86 B3 20d 0.70 — — 0.89 0.74 — — 40d 1.07 — — 1.29 0.82 — — 60d 1.22 1.31 1.20 1.38 1.10 1.41 1.03 Conclusions The air pollution is increasing seriously and acid rain damage is also growing along with the industrialization process.
Online since: January 2013
Authors: Jian Chun Wu
Improve the photocatalytic activity of TiO2 method to basically have precious metals deposits, metal ion doping [2] [3]. 1 Experimental procedure 1.1 Experimental raw material Anatase nano-TiO2(mean grain size 10nm),FeCL3, AgNO3, CeSO4, ammonium tungstate, ammonium metavanadate 1.2 Experimentation method Fig.1 is the modified process of Nanometer titanium dioxide.TiO2 H2O Stirring Ultrasonic dispersion drying Heat Treatment Composite material Formaldehyde degradation Metal salt 盐 Fig.1 The modified process of Nanometer titanium dioxide Choose doping metal salt and transform them into 1.0 g/L solution.
(1) Q——Formaldehyde degradation rate (%) W0——Formaldehyde initial concentration(ppm) Wi——formaldehyde concentration after 48h(ppm) 1.4 Bacteria inhibitive rate 1ml initial bacterial suspension as a reference to the contrast liquid measure which the initial number of bacteria, antibacterial materials and 1ml of the initial mixing bacteria and then to join in the conical flask with 100ml of sterile water, and then tapered bottle placed on the oscillation case, cultured for 24 hours in a constant temperature of 30 ℃ environment, measurement of the remaining total number of live bacteria to the quantitative evaluation of the antibacterial properties of the material.
Nanometer TiO2 with large surface area and strong adsorption capacity can absorb a large number of •OH and water molecules which improve the efficiency of the reaction[4]-[8].
Online since: July 2014
Authors: Yun Hae Kim, Riichi Murakami, Jin Woo Lee, Dong Myung Lee, Jin Cheol Ha, Pang Pang Wang
The samples were numbered A through E and 1 through 6.
The A-E samples were numbered according to the atmosphere temperatures, which were RT, 70, 110, 150 and 190 ℃, respectively. 1-6 were numbered according to the sputtering times for the Ag electrodes in intervals of 10 seconds.
The mobility of the samples can be expressed as (1) Where μi, μl, and μg are the mobility corresponding to ionized impurities, lattice vibration, and grain-boundary scattering, respectively.
Online since: July 2011
Authors: Lin Tang, Yong Feng Guo, Mu Xi Wang
But how to control the powders grain suspended in kerosene subside speed?
From the above, we confirm the stir groove diameter T is 600mm, the oar diameter Dj is 200mm, the oar width B is 35mm, the number of oar leaf is 6 and its angle is 45˚, the width of baffle W is 50mm and the number is 4.The stir Renault Re can be calculate from formula (4): (4) So the Re is 6.4×104.The power of stir can be calculate from formula (5): (5) In the formula (5), Np is power coefficient, we choose Np is 2 , we calculate the stir power N is13.8W.
The number of impeller segment has the relation to the ratio of depth and diameter.
Online since: January 2012
Authors: Vinod Kumar, Amitesh Kumar
A number of researchers have studied the effect of alloying element on eutectoid transformation and mechanical properties of casting [4-6].
Table 1: Thermophysical Properties of Gray cast Iron Properties Values Thermal conductivity 22.2 W/m/K Density 6530 Kg/ m3 Specific Heat 0.9 kJ/kg/K Latent Heat 241 kJ/kg Solidus Temperature 1167 0C Liquidus Temperature 1175 0C Experimental Sand mould was made silica sand of AFS 70 grain fineness number, 5% bentonite and water were added.
Table 2: Dimension of different step of stepped bar STEP NUMBER LABEL DIMENSION (mm) 1 S1 46 x 50 x 3 2 S2 52 x 50 x 5 3 S3 50x 50 x 12 4 S4 50.5 x 50 x 20 Results and Discussions Simulation of Solidification of stepped bar: Simulation of solidification of stepped bar was carried out on the platform of finite element method based mold filling and casting software Pro-Cast 2008.
Online since: January 2005
Authors: C.S. Kim, S.I. Kwun
The final grain size and UTS of the specimens were approximately 41 ㎛ and 261 MPa for Cu, and 54 ㎛ and 348 MPa for the Cu-35Zn alloy, respectively.
Therefore, the dislocation cell structure is believed to be more sensitive to changes in the ultrasonic parameters than a planar array of dislocation. 10 0 10 1 10 2 10 3 10 4 10 5 0 50 100 150 200 250 300 Cu-35Zn Cu ∆ε∆ε∆ε∆εt / 2 = 0.3% Stress(MPa) Number of cycles(N) Fig. 1.
Change in the cyclic stresses with the number of cycles under a constant total strain amplitude.
It was shown that the dislocation density increased with increasing number of fatigue cycles, as shown in Fig. 2.
Online since: July 2015
Authors: Edvins Dauksta, Aleksandr Mychko, Artur Medvid
Introduction Cadmium zinc telluride (CdZnTe) is a suitable material for room temperature x- and γ-ray detectors due to high average atomic number, large bad-gap and good electron transport properties [1].
However, structural defects such as dislocations, grain boundaries, Te precipitates and uncompensated point defects reduce the yield of suitable crystals for commercial applications.
CdZnTe crystal was irradiated by laser at maximal intensity 5.0 MW/cm2 and 3.6×104 number of pulses, because at higher laser intensity the surface of the crystal could be damaged.
I-V characteristics of CdZnTe samples before (curve 1 and 1’) and after irradiation (curve 2 and 2’) by the λ=1064 nm Nd:YAG laser at 5.0 MW/cm2 with number of laser pulses 3.6×104.
Online since: June 2008
Authors: C.S. Kim, S.I. Kwun, Y.C. Jeon, Ho Ki
The HAZ of AISI 316L SS and the AISI 316L SS itself consisted of polygonal austenite grains with many annealing twins and ferrite phase with a volume of approximately 2%, as shown in Figs. 2(e) and 2(f), respectively.
Fig. 3 shows the crack length versus number of fatigue cycles in SA 508 Cl.3, AISI 316L SS and the weldment.
The cracks grew rapidly in the order of SA 508 Cl.3, AISI 316L SS and the weldment after the same number of cycles.
Crack length vs. number of cycles in individual materials.
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