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Online since: November 2015
Authors: S.N. Grigoriev
If the substrate is fed with pulses of 20 μs and an amplitude of 30 kV with a repetition rate of 25 Hz, deposits a dark purple nanocomposite coating with the width of the interface noticeably greater than 1 μm, and a hardness of 5000 HV, consisting of grains of TiN and Ti2N (more recent) with sizes less than 10 nm.
It can amount to hundreds of electron volts, and this electron can form inside the chamber the number of ions Nε = εо/W, where W is the cost of gas ionization.
When λN > a, the number n of ions formed in the trap of fast electrons created by ionization of gas in the cathode layer by one electron emitted by the cathode, equals to n = C(d/a)N2, (5) where N = eUc/W– the maximum number of ions formed by the one cathode emitted electron, and the coefficient C depends on N and linearly increases from C = 0.2 for N = 10 to C = 0.36 for N = 20 and C = 0.5 for N = 30.
In this case, the number of ions formed by them is less than N, and to keep the magnitude of the discharge current is necessary, increasing the cathode drop Uc, to increase the width d and the volume of the cathode layer, and hence the number n of ions formed by fast electrons from the layer.
Therefore, the number of ions turning into the fast molecules in the layer 16 is negligible.
Online since: December 2011
Authors: Qi Hong Zhu, Hong Xia Xia
At the same time, the number of the withered leaves in group C is also increased.
On the eighth day, the leaves in group A begin to be withered and the number of withered leaves in group B and group C is also increased.
In the following days, the number of dead plants will be increased as time goes on.
A great number of radicals have been accumulated and the content of the membranous peroxidation products has been increased.
Nan Ming,Wang Hanning,Zhang Jinwen,etal Effects of low-temperature on physiological and biochemical indexes in different grain types of maize seeds[J].Journal of Gansu Agricultural University, 45(6) (2010) 71~74 [25].
Online since: December 2022
Authors: Omar Bataineh, Mohammad Smadi
The reduction in impact toughness shown in the same figure was likely due to the amount of precipitation that occurred is not high which leads to fractures, shiny, and grains became more brittle.
Different epoch numbers with ranges between 500 and 100000 data points were tested to investigate the error dependence on the number of epochs used.
It can be seen from this figure that at epoch number 40,000, RMSE reaches a steady state value at a minimum of less than 0.05.
Each model's hidden layer's number was 5,3,1; training time equal 50,000, and other parameters were set to default.
` Fig. 8: Iteration number against Root mean square error.
Online since: October 2020
Authors: Hairul Arsyad, Novriany Amaliyah, Humam Eddy Prabowo, Andi Erwin E. Putra, Azwar Hayat
Acidification was achieved by adding acetic acid to Sol-gel solution to produce a pH number of 1, 2, and 3.
This phenomenon occurs due to the grain size was still large.
Online since: November 2010
Authors: S.J. Ojolo, A.O. Adelaja
Nomenclature A Area of collector [ m2 ] Cp Specific heat capacity, [kJ/ kg K] Dh Hydraulic diameter for non circular tubes such as square ducts, [ m] Fr Heat removal factor G Daily radiation, [MJ/day] h Coefficient of heat transfer, [W/m2K H Rate of incidence of beam or diffuse radiation on a unit area of space, [W2/m4 K] hfg Latent heat of vaporization, [MJ/kg] I Solar insolation of collector, W/m2 k Thermal conductivity, [W/ mK] m Amount of moisture removed, [kg] Mass flow rate, [ kg/s] m1 Mass of water loss md Mass of dried product mf Final moisture content mi Initial moisture content mw Mass of wet product Nu Nusselt number P Perimeter of collector, [m] Pr Prandtl number Qe Heat of vapourisation, [MJ] Qu Useful power, [W] R1 Heat loss coefficient by convection & radiation from plate to cover, [ m2.K/ W] R2 Convective heat loss coefficient from cover to ambient, [m2.K/ W] R3 Conductive heat loss coefficient through insulator, [m2.K/ W] R4 Convective
Table 6: Calculated values for design parameters S/N Parameters Values Equations used 1 Reynolds number 229539.35 (turbulent) Equation (1) 2 Nusselt number 397.71 Equation (2) 3 Coefficient of heat transfer, [W/m2] 12.38 Equation (3) 4 Total heat loss coefficient, [W/m2k] 1.803 Equation (4) 5 Heat removal factor 0.9429 Equation (5) 6 Useful energy collected, [W] 391.50 Equation (6) 7 Collector efficiency, [%] 65.59 Equation (7) 8 Mass flow rate,[ kg/s] 0.01944 Equation (8) 9 Volume flow rate, [m3/s] 0.01753 Equation (9) The heat removal factor of 0.9429, useful energy collected, 391.50 W, collector efficiency, 65.6% and mass flow rate of 0.01944kg/s were obtained for the system.
Mumba, Development of a photovoltaic powered forced circulation grain dryer used in the tropics, Renewable Energy, 6 (7) (1995) 885-862 [11] G.
Lhendup, and Lu Aye, Technical and financial evaluation of a solar dryer in Bhutan, Solar 2005 – ANZSES Conference, Dunedin, Dec. 2005 Appendix Reynolds number, Re (1) where, Reynolds number for a flat plate in turbulent flow is and if the channel through which fluid flows has a non circular cross section.
Nusselt number, Nu [22] (2) The following air properties at 319K were used (extracted from Holman, [23]); , , , , , , .
Online since: July 2014
Authors: Yong Mei Zhou, Ai Min Yang, Jia Neng Yang
., MN}, where N represents the number of Esus of the word, Mn(n = 1,2, ..., N) represents the n-th Esu of the word.
Word segmentation is the basis for text processing, we use CTCLAS to preprocess for fine-grained segmentation and POS tagging.
Then the number of occurrences of nouns, adjectives, interjections, onomatopoeia, negative words and adversative words was counted.
Table 3 Sentiment features of text Type Features Sentiment lexicon Positive and negative sentiment strength values, number of sentiment words Punctuation Whether there is a question mark, exclamation POS statistics Numbers of Nouns, verbs, adjectives, conjunctions, onomatopoeia Negative words Number of negative words Adversative words Number of adversative words After selecting the sentiment feature of text, quantify the features to get the text feature vector.
Table 4 CSLS comparative analysis result data Lexicon Number of positive words Number of negative words Accuracy NTUSD 2647 7741 0.77 TUPNL 5565 4467 0.72 (2) Optimizing CSLS Next, we adjust the sentiment strength of the words in CSLS to improve the accuracy of it.
Online since: May 2012
Authors: Xiu Fen Li, Hui Qin Chen
number cement(g) nano kaolin (g) Substitution rate (%) overall water demand (ml) Water requirement (%) 1 500 0 0 140.00 28 3 495 5.00 1% 149.00 29.8 4 490 10.00 2% 161.00 32.2 5 485 15.00 3% 166.00 33.2 6 480 20.00 4% 173.00 34.6 7 475 25.00 5% 163.00 32.6 8 470 30.00 6% 167.00 33.4 9 465 35.00 7% 177.00 35.4 10 460 40.00 8% 181.00 36.2 11 455 45.00 9% 189.00 37.8 Cement setting time and final setting time were detected by national standard detection method, the water demand detection method is also by the national standard GB / T1346-2001《Test method for Standard consistency water needed, setting time and stability test》.
Tab.2 Setting time test results of cement mixed with nanometer kaolin number cement(g) nano kaolin (g) Substitution rate (%) Initial setting time Final setting time 1 500 0 0 3:32 4:46 3 495.00 5.00 1% 3:52 5:04 4 490.00 10.00 2% 4:35 6:01 5 485.00 15.00 3% 4:56 6:09 6 480.00 20.00 4% 4:58 6:12 7 475.00 25.00 5% 4:45 6:22 8 470.00 30.00 6% 4:50 6:08 9 465.00 35.00 7% 5:12 6:32 10 460.00 40.00 8% 5:26 6:52 11 455.00 45.00 9% 5:35 7:20 12 450.00 50.00 10% 5:54 7:44 note Cement and nano kaolin unit for g;Initial and final setting time units for h:min As you can see, with the increasing of the nano-kaolin, the initial setting time and final setting time are increased, and indicates that the nano-kaolin ash activity is not strong, is also a very good proof of the volcanic ash activity test.
These nanoscale subtle pore can use the nano kaolin grain to fill which have no enough time to participate in ash reaction , thus make cement stone density increase, micro structure improve, and increase its strength.Compared with ordinary ore, kaolin nanoparticles in the early filling effect is good[4].
Online since: October 2002
Authors: Francisco Velasco, José Manuel Torralba, J.A. Bas, J. Abenojar
No precipitated nitrides appear in grain boundaries when sintering in 75%H2-25%N2 atmosphere, and only the typical porosity is found.
Number of hours to 0,25% corrosion in the salt spray test of materials sintered in 75%H2-25%N2, pure H2 and vacuum at 1230 ºC. 0 50 100 150 200 250 300 +316L +1,5% AlCr2 +3% AlCr2 +1,5% Cr2Ti +3% Cr2Ti +1,5% SiC +3% SiC +1,5% VC +3% VC Time (hours) 75%H2+25%N2 H2 Vacuum Figure7.
Number of hours to 0,25% corrosion in the salt spray test of materials sintered in 75%H2-25%N2, pure H2 and vacuum at 1230 ºC.
Online since: November 2012
Authors: Hua Shu Yang, Jin Yu Li, Gang Chen, Luo Shao
The result will inevitably lead to that a number of important engineering indices of laterite dam gradually deteriorated.
The results can be obtained by equation: Dm=(1-Pwe)Ne/(1-Pe)Nwe, where Dm is the deconstruction degree, Pwe and Pe are average porosity of laterite samples without erosion and eroded respectively, Nwe and Ue are particle numbers of laterite samples without erosion and eroded respectively.
Collochemistry character of the structure connection among red clay mineral grain[J].
Online since: February 2014
Authors: Da Qing Yin, Jin Wu Wang, Yun Zhao
However, not only its total output but also the single output is on the top of grain production.
As shown in figure 6: (9) In the formula:—radius vector serial number of the center wheel meshing with the Planetary wheel ,when the Gear is at the initial position.Therefore, the absolute value of the Angle of the center wheel , the Intermediate wheel and the Planetary wheel are expressed in, and respectively
In addition, the weighing coefficient between targets couldn't be represented with number.
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