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Online since: October 2014
Authors: Srithar Rajoo, Alias Mohd Nor, Norhayati Ahmad, Muhammad Rabiu Abbas, Muhammad Hanafi Md Sah
Furthermore, hot corrosion attack has become a major concern in a number of high temperature engineering applications [10].
The application of thermal barrier coating can significantly improve the operating temperature capabilities, improve the efficiency, reliability and durability of a number of structural components operating under elevated temperature environments [11].
Fig. 6 - Centroid radius ratio as a function of azimuth angle with free vortex assumption [36] Fig. 7 - Cross-sectional area ratio as a function of azimuth angle for free vortex assumption [36] Eq. 1 represents the radius ratio R1/R2 of an adiabatic modified free vortex relationship in terms of Mach numbers, M and flow angles, α while Eq. 2 is the volute area ratio, A1/A2 as a function of inlet and discharge Mach numbers, M, inlet and discharge flow angles as well as the stagnation pressure ratio P02/P01 across the volute while γ is specific heat ratio
Mitomo, Influence of phase transformation on grain growth behavior of silicon nitride ceramics, Key Engineering Materials. 159-160 (1999) 251-220
Online since: August 2011
Authors: Li Ming Cai, Ding Ping Liu
The number of the equipment required is rather big and the motor capacity if big as well, for the casting blanks are very thick.
It helps drastically reduce the number of installed machines and electrical machine capacity of the production line.
The MFCC invention patent application number is 200510021740.4, and it has been reported the first in the world through No.
The eddy-current magnetic field and the coil magnetic field have opposite directions, mutually repel and are floated; The appropriate cooling adopts eddy current magnetic field; parameters of equipment which produces 30 thousands of tons of copper, copper alloy strip materials, and copper liquor blades with the thickness of 3mm and width of 320mm every year are set at the first beginning as follows: The longitudinal length of magnetic floating area is 0.3m; the flow rate is 9.33/min; and the floating time is 0.032min equal to 1.92s; The total weight of the sprayed micronic water grains is 15.22kg/min (the maximum spraying capability of the current commercial spraying equipment is greater than 19t/min).
Fig. 3 Horizontal EMC Known from P642-645 of Metal Academic Journal of June, 1996 (the patent number of similar technical proposals in USA is USP4678024), molten liquid plates are floated between convex plates of a magnetizer (see Figure 4), and the produced maximum magnetic floating force P is: P=H÷2 Or P=÷2×(IN/L) note: represents magnetic permeability:4×10-7; I represents electric current: ampere; N represents coil: turns; L represents the distance between the two convex plates: m; Figure 4 Molten liquid plates are floated between the two convex plates.
Online since: October 2013
Authors: Jie Chen, Zhen Kun Lin, Jun Hui Wu, Hui Ping Si, Kai Yan Lin, Xue Jun Yang
Thus, a raising number of pig, cattle, sheep, and poultry are of considerable figure which accounting for 50%, 8.5%, 18% and 28% of world output [3].
PA was used as chemical raw material at first, then, in recent decades, an increasing number of studies, especially in Japan, showed that PA can be applied in synthesis of agriculture chemicals, soil amendment and plant growth accelerator according to its property and purification process.
Pan et al. applied it on the experiment of dry crop and greenhouse vegetable and indicated that it would improve soil permeability, moderate the soil pH value, temperature and moisture, increase the number of beneficial organisms, then further help to manage the crop diseases and pests, and promote plant growth and fruit quality and taste [31].
As a soil amendment, PA mainly effected on the number and activity of soil microorganisms, thus, it offers better soil environment for crops.
Hence, the increasing wheat production could be accounted for by the multiple benefits on salt leaching, improvement of soil fertility, nutrient supply and translocation to the grain under the amendment.
Online since: June 2021
Authors: Ren Bo Song, Yan Huang, Zhe Rui Zhang, Li Fang Yang, Huan Jun Wei
Product Experimental Load/N Reciprocating Friction Times/time Sample Number Example Zn 3 5~50 Zn-3N-50 ZAM 3 ZAM-3N-50 Zn 5 5~50 Zn-5N-50 ZAM 5 ZAM -5N-50 Put a piece of Zn product and a piece of ZAM product in a 1mol/L sodium hydroxide solution for 1 minute to simulate the degreasing agent in production, which are respectively denoted as degreased Zn and degreased ZAM.
Product Whether Degreasing Treatment Neutral Salt Spray Test Parameters Sample Serial Number Zn √ NaCl solution concentration: 50g/L pH value: 6.7 temperature: 35℃ duration: 72h Degreasing Zn ZAM √ Degreasing ZAM Zn × Zn ZAM × ZAM After the experiment is completed, the corrosion situation is evaluated according to the Chinese standard GB/T6461-2002.
Sample serial number Wear zone width/μm Depth of wear zone/μm Zn-3N-50 208.93 3.16 ZAM-3N-50 173.89 2.49 The friction coefficient curve of zinc-plated and Zn-Al-Mg anti-fingerprint products under 5N load pressure and 50 cycles is shown in Fig. 3.
Sample serial number Wear zone width/μm Depth of wear zone/μm Zn-5N-50 386.64 19.88 ZAM-5N-50 327.12 18.11 The friction coefficient curve under 5N load shows that the friction coefficient changes periodically.
Fig. 6 Schematic diagram of detached abrasive grain accumulation.
Online since: September 2024
Authors: Lorenzo Donati, Riccardo Pelaccia, Sara Di Donato, Marco Negozio, Barbara Reggiani
., hydraulic diameter, Reynolds number, pressure drops…) with good accuracy [4, 6, 19-21].
Therefore, it becomes clear how the low computational effort is fundamental for testing a large number of designs in a reasonable time.
A total of 100 designs (10*10 initial population*number of generations) were evaluated, starting from an initial population of 10 configurations generated using a Pseudo-Random Sobol DOE strategy: the FE model was launched by the optimizer, the results stored in a table, and, at each subsequent run, the input variables were changed by the algorithm with the aim to satisfy the objective functions.
Award Number: 0001052 dated 23/06/2022.
Tomesani, Grain evolution analysis and experimental validation in the extrusion of 6XXX alloys by use of a lagrangian FE code, Int.
Online since: November 2014
Authors: Jan Jowsa, Agnieszka Benduch, Rafał Wyczółkowski
Numerical algorithms of such models are based on the equations of heat transport, recrystallization kinetics and grain growth, as well as the correlations between the microstructure of the given material and its mechanical properties.
The value of parameter dx depends on the number of the segmentation n and, in respect to the bar’s radius rp, it is described by the following relation: (5) Before a further discussion of the calculation procedure, due to the character of the model, one should consider the problem of scale.
As a result of the partition of the analysed system, we obtain the n-number of sections, presented in Fig. 4b.
The performed simulations showed that, with the segmentation number n = 200, a further increase of the latter has no significant effect on the calculation result.
Gaps geometries for elementary cells K1 and K2 The conduction resistance in the gas, Rgas, for both cells, is calculated in a similar way as resistance Rbar, that is, one performs a partition of the gap zone into the n-number of sections, and for each section, an individual thermal resistance Ri-gas is calculated.
Online since: December 2024
Authors: Msheer Hasan Ali
Experimental Program A number of trial mixes were made as part of the experimental program to ensure that the slurries met the specifications for casting SIFCON composites and had the appropriate fresh concrete characteristics.
Therefore, in order to investigate the mechanical performance of SIFCON and G-SIFCON, a number of specimens were cast and tested.
Slurry Mix Proportion To develop a slurry with acceptable fresh characteristics at the beginning, a number of trial mixes were conducted.
As a result, the minimal number of specimens required to test SIFCON and G-SIFCON composites and meet the investigation's objectives was established.
The effect of utilizing fly ash with high ratios effects in positive manner on the compressive strength of SIFCON mixes, that is due to the high surface area of fly ash which fills in the spaces between cement grains.
Online since: August 2006
Authors: Junji Nakata, Yuki Hanamoto, Shigeji Taniguchi
Number 1 is the base steel and provides the reference for comparison.
Numbers 1 to 4 have varying amounts of Si for understanding the influence of Si content and Nos. 5 to 7 are for examining the influence of S.
Numbers 8 to 10 will show the influence of P, and Nos. 11 to 13 the influence of combined addition of S and P.
Number 3 and Nos. 5 to 13 contain 1% Si.
During the polishing for metallography, the FeO grain boundaries were found more fragile than those formed on P-free steels.
Online since: May 2019
Authors: Alexandra Viktorovna Semenyutina, Aliya Shamilyevna Khuzhakhmetova, Igor Petrovich Svintsov, Viktoria Alekseevna Semenyutina
The traditional adsorption method is one of the most common for the protection of the environment from toxic substances, but it has a number of disadvantages: it is resource-intensive, significantly complicates the scheme of the technological process and requires significant material costs.
The total number of amino acids under the action of formaldehyde increases by 8.3 % with an ambiguous effect on the content of basic, acidic and neutral amino acids.
The amount of water sorption on studied sorbents, obtained experimentally and using equation TOSM (Kind = 453 K) Sorbent Adsorption, mmol/ g experimental data data calculated from the equation TOSM К95 2,34±0,6 2,22±0,7 М95 2,23±0,7 2,11±0,9 М45К20 2,14±0,8 1,95±0,7 The coefficient of internal diffusion of water molecules is determined by the Znamensky equation , where F is the degree of filling of the sorbent tank, t is the time to reach the degree of filling of the sorbent tank, r is the radius of the grain.
Gas chromatographic method determined by the thermodynamic characteristics of the adsorption process of formaldehyde (N, S, G), which have small differences for all samples (3 – 35 %), however, the maximum value of the differential heat of adsorption of the sample К95 indicates the greatest number of micropores and a higher energy of adsorption compared to the other investigated sorbents.
Coniferous woody plants (Norway spruce, Scots pine, European larch) are less resistant to the action of formaldehyde contained in the atmosphere in comparison with deciduous species (pedunculate oak, birch); the stability of coniferous tree species increases in the number of larch spruce pine. 2.
Online since: April 2014
Authors: Ju Rui Yang, Yan Wei Liu, Xiao Xia Hou, Jin Xuan Chen
In recent years, with the development of the construction industry and the awareness of environmental protection , the relevant scholars have done a lot research on ceramsite concrete ,LIU Zhenfeng found the story drift of LC40, LC45, LC50 lightweight aggregate concrete of 1800 is equal to C25, C30, C35 concrete by the strength grade replacement of C25-C35 concrete with a strength class LC25-LC50 pottery grain situation [1].
Fig.1 Ichnography of the ceramsite concrete frame—shear wall structure Table 1 The size and reinforcement of frame column section height(m) section size (m) angle bars longitudinal edge horizontal side stirrup 0—14 0.65×0.65 4Ф25 3Ф25 3Ф25 φ12@100 14-21 0.60×0.60 4Ф25 3Ф25 3Ф25 φ12@100 Table 2 The size and reinforcement of frame beam section the beam number number of plies section size (m) longitudinal steel the top The bottom longitudinal beam 1—3 0.65×0.3 2Ф25 4Ф25 longitudinal beam 4—6 0.65×0.3 2Ф22 4Ф22 transverse beam 1—6 0.60×0.3 2Ф22 4Ф22 corridor beam 1—6 0.45×0.3 2Ф22 4Ф22 The analysis of the structure model The physical model.
Table 3 The first ten natural vibration period of structure  number ceramsite concrete frame UX UY UZ SumUX SumUY SumUZ RX RY RZ 1 0.25804 0 0.72531 4.74E-17 0 0.72531 4.74E-17 0.45756 2.46E-17 1.73E-19 2 0.22794 0.73885 1.91E-17 3.54E-17 0.73885 0.72531 8.28E-17 3.86E-17 0.85045 2.07E-17 3 0.16051 8.47E-17 2.00E-16 4.01E-16 0.73885 0.72531 4.84E-16 6.05E-16 2.09E-15 0.72136 4 0.10284 0.1248 9.89E-16 1.50E-14 0.86365 0.72531 1.55E-14 1.41E-16 0.00043 2.37E-14 5 0.0789 0.0257 5.51E-15 1.43E-15 0.88935 0.72531 1.69E-14 7.59E-15 0.00177 3.55E-14 6 0.07712 8.44E-14 0.19355 2.79E-13 0.88935 0.91886 2.96E-13 0.00671 1.23E-16 7.25E-15 7 0.06137 0.0091 8.47E-19 9.82E-18 0.89845 0.91886 2.96E-13 1.10E-18 0.00157 7.44E-16 8 0.05996 0.01463 1.17E-16 5.06E-16 0.91307 0.91886 2.96E-13 5.41E-19 0.00677 2.64E-18 9 0.05811 2.74E-16 6.29E-15 0.26496 0.91307 0.91886 0.26496 2.27E-16 2.15E-17 2.65E-16 10 0.05684 9.33E-15 1.47E-05 8.66E-15 0.91307 0.91887 0.26496 0.03757 3.47E-16 1.82E-15 number Ordinary
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