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Online since: November 2010
Authors: Bin Yang, De Zhi Zeng
In the course of the tests,some important parameters of the expandable casing were measured before and after expansion,including the inner and outer diameter, wall thickness, ovality, wall thickness of inequality and the axial deformation, etc..These data provide a reliable basis for the mechanism research of the N80 casing expansion.
Before expansion After expansion Average wall thickness mm Wall thickness nonuniformity % Avg. wall thickness mm Wall thickness nonuniformity% Wall thickness reduction mm Wall thickness reduction ratio % 1 7.83 3.53 7.38 6.43 0.45 5.75 2 7.78 4.2 7.25 6.18 0.53 6.82 3 7.93 4.4 7.33 6.13 0.60 7.57 4 7.93 3.48 7.53 3.53 0.40 5.05 5 7.70 3.25 7.10 3.83 0.60 7.79 Ovality of expandable casing The changes of the largest pipe diameter, minimum diameter and ovality of expandable casing before and after expansion are shown in Table 3.
Before expansion After expansion Average wall thickness mm Wall thickness nonuniformity % Avg. wall thickness mm Wall thickness nonuniformity% Wall thickness reduction mm Wall thickness reduction ratio % 1 7.83 3.53 7.38 6.43 0.45 5.75 2 7.78 4.2 7.25 6.18 0.53 6.82 3 7.93 4.4 7.33 6.13 0.60 7.57 4 7.93 3.48 7.53 3.53 0.40 5.05 5 7.70 3.25 7.10 3.83 0.60 7.79 Ovality of expandable casing The changes of the largest pipe diameter, minimum diameter and ovality of expandable casing before and after expansion are shown in Table 3.
Online since: December 2014
Authors: An Guo Huang, Dong Xu Yang, Lu Yang
Test data were analyzed in relation to microstructure,tensile and impact properties and hardness distribution on the welding joint,then the effect of holding time under post weld heat treatment on properties of joints can be investigated.The results demonstrated that micro-hardness in the weld and tensile strength decreased with tempering time prolonging, while impact toughness increased with the extension of tempering time.
The reduction 15% of hardness of joint with 760℃ from 2h to 4h PWHT is modester than oh to 2h.
The tensile strength and yield strength decreased with the tempering time prolonged, but the rate of reduction of area rise up to about 40%. as well as its plasticity.
The reduction 15% of hardness of joint with 760℃ from 2h to 4h PWHT is modester than oh to 2h.
The tensile strength and yield strength decreased with the tempering time prolonged, but the rate of reduction of area rise up to about 40%. as well as its plasticity.
Online since: March 2017
Authors: Zabihollah Tahery, Faraidoon Rahmanzai, Shigeyuki Date
Some researchers investigated the effect of delaying the addition time of superplasticizer to mortar or concrete, but there is not enough data about the effect of external temperature on performance of superplasticizers and consequent influences on fresh properties of mortar or concrete.
It is assumed that the immediate addition of the SP to mixing water after heating, may cause a reduction in heat stimulation effects due to a sudden reduction in temperature of the SP.
It is assumed that the immediate addition of the SP to mixing water after heating, may cause a reduction in heat stimulation effects due to a sudden reduction in temperature of the SP.
Online since: November 2022
Authors: Jesus Angel Blanco, Pedro Gorria, David Martínez-Blanco, Abderrahim Guittoum, Nadia Boukherroub, Messaoud Hemmous, Hafida Ourihane
Scanning Electron Microscopy (SEM) images confirmed the behaviour of the mean crystallites size, where it can be seen that the addition of Si promotes the reduction of the size of powder particles.
Introduction Through the last years, a nanomaterial has enjoyed the interest of huge number of materiel scientists due to its various applications that can be used in modern technologies like: magnetic fluids, magnetic separation, microelectronic devices, data storage and resonance imagery [1].
Indeed, the non-ferromagnetic dissolved Si atoms during the milling process induces a modification of the 3d bands of Fe and Ni, which are responsible for the ferromagnetism, hence the reducing of the μFe and consequently reduction of MS [19].
This was directly conformed by SEM images, where it can be seen that the addition of Si promotes the reduction of the size of powder particles.
Kumar, Synthesis and Characterization of Nanocrystalline Fe(100-x)Ni(x) Alloy Powders by Auto-combustion and Hydrogen Reduction, J.
Introduction Through the last years, a nanomaterial has enjoyed the interest of huge number of materiel scientists due to its various applications that can be used in modern technologies like: magnetic fluids, magnetic separation, microelectronic devices, data storage and resonance imagery [1].
Indeed, the non-ferromagnetic dissolved Si atoms during the milling process induces a modification of the 3d bands of Fe and Ni, which are responsible for the ferromagnetism, hence the reducing of the μFe and consequently reduction of MS [19].
This was directly conformed by SEM images, where it can be seen that the addition of Si promotes the reduction of the size of powder particles.
Kumar, Synthesis and Characterization of Nanocrystalline Fe(100-x)Ni(x) Alloy Powders by Auto-combustion and Hydrogen Reduction, J.
Online since: July 2021
Authors: Ismail Ismail, Rahwanto Adi, Akhyar Akhyar, Zulkarnain Jalil, Hazril Gursida Ariel
So, it is consistent with the XRF data.
Therefore, in this paper will introduce a qualitative data of local iron sand in Banda Aceh coastal area, includes the phase identification and the nano-crystallite size of natural magnetite.
Afterwards, to determine the elemental content, phase compostion, the samples were identified using X-rays diffractometer (XRD Shimadzu, D6000) and analyzed using search-match method by comparing to the International Crystallography Diffraction Data (ICDD) database.
Fe3O4 Fe3O4 Fe3O4 Fe3O4 Fe3O4 Fe3O4 Fe3O4 TiO2 Results and Discussion The X-ray Diffraction (XRD) data was conducted the phase identification analysis by observing the angle 2θ, lattice distance factor (d), intensity (I/IO), the phase and the crystall structure.
Referring to XRD data, it is known that the particle size has changed to nanocrystals.
Therefore, in this paper will introduce a qualitative data of local iron sand in Banda Aceh coastal area, includes the phase identification and the nano-crystallite size of natural magnetite.
Afterwards, to determine the elemental content, phase compostion, the samples were identified using X-rays diffractometer (XRD Shimadzu, D6000) and analyzed using search-match method by comparing to the International Crystallography Diffraction Data (ICDD) database.
Fe3O4 Fe3O4 Fe3O4 Fe3O4 Fe3O4 Fe3O4 Fe3O4 TiO2 Results and Discussion The X-ray Diffraction (XRD) data was conducted the phase identification analysis by observing the angle 2θ, lattice distance factor (d), intensity (I/IO), the phase and the crystall structure.
Referring to XRD data, it is known that the particle size has changed to nanocrystals.
Online since: October 2014
Authors: Danuta Cozma, Ioan Tenu, Radu Rosca, Tibor Rittner
A statistical analysis of the experimental data led to the deduction of the equations that express the variations of the flow rate in time.
The test bench for the evaluation of spraying uniformity is measuring the amount of liquid distributed through each nozzle; the data is transmitted via a wireless system to a computer and is then processed by the means of specialized software.
The steps for performing the tests are as follows: · A file which contains the general data about the test bench (type of spraying machine, power source etc.) is generated (Fig. 3.a); a b c d Fig.3.
The software of the HERBST ED-20-900.S test bench: a) file with general data; b) file containing the testing conditions; c) file with the amount of liquid collected from each nozzle; d) deviation of the quantity distributed by each nozzle from the reference measurement
· Each test is performed during 300 hours, at a specified operating pressure; the data for each nozzle is recorded every 20 hours and compared with the initial ones.
The test bench for the evaluation of spraying uniformity is measuring the amount of liquid distributed through each nozzle; the data is transmitted via a wireless system to a computer and is then processed by the means of specialized software.
The steps for performing the tests are as follows: · A file which contains the general data about the test bench (type of spraying machine, power source etc.) is generated (Fig. 3.a); a b c d Fig.3.
The software of the HERBST ED-20-900.S test bench: a) file with general data; b) file containing the testing conditions; c) file with the amount of liquid collected from each nozzle; d) deviation of the quantity distributed by each nozzle from the reference measurement
· Each test is performed during 300 hours, at a specified operating pressure; the data for each nozzle is recorded every 20 hours and compared with the initial ones.
Online since: December 2013
Authors: Le Feng Cheng, Jian Fu Peng, Tao Yu
On the other hand, these documents are lack of online monitoring systems within the general special users’ terminal distribution systems, even if they mention the online monitoring systems, they still exist technical problems at the angle of power quality data acquisition, data storage and data treatment and analysis, leading to imperfact practical effects.
Extended RAM can enough store the processing, monitoring and recording data of DSP chip, these data are written and read by the energy analysis software for analyzing, which makes the data transmission between DSP and synchronous sampling signal unit, CPLD and its peripheral unit is more convenient and quickly, the extended RAM using IS61LV25616AL chip to achieve function expansion, and is connected to the CH376 chip, SD card interface and USB interface, and the data stored in the RAM are written and read by the CH376 chip into the extended SD card or U disk.
The communication module mainly uses UART chip : TL16C550 and SP3232, and the main function of which is to provide reliable, flexible interface service between the data circuit terminating equipment (DCE) and data terminal equipment (DTE).
The aforementioned SD card and U disk are store the data got by monitoring, recording and processing of DSP chip.
Fig. 5 shows the user-friendly and supporting software interface of energy saving diagnosis and analysis, which concludes 6 parts: DSP chip initization, enable interrupt, start samping, sample completed, Data proceess, display results impoert data.
Extended RAM can enough store the processing, monitoring and recording data of DSP chip, these data are written and read by the energy analysis software for analyzing, which makes the data transmission between DSP and synchronous sampling signal unit, CPLD and its peripheral unit is more convenient and quickly, the extended RAM using IS61LV25616AL chip to achieve function expansion, and is connected to the CH376 chip, SD card interface and USB interface, and the data stored in the RAM are written and read by the CH376 chip into the extended SD card or U disk.
The communication module mainly uses UART chip : TL16C550 and SP3232, and the main function of which is to provide reliable, flexible interface service between the data circuit terminating equipment (DCE) and data terminal equipment (DTE).
The aforementioned SD card and U disk are store the data got by monitoring, recording and processing of DSP chip.
Fig. 5 shows the user-friendly and supporting software interface of energy saving diagnosis and analysis, which concludes 6 parts: DSP chip initization, enable interrupt, start samping, sample completed, Data proceess, display results impoert data.
Online since: August 2016
Authors: Yan Feng
Collect and aggregate data reporter responsible for data, to filter information edited by production designer visualize news chart.
In order to ensure that detailed and accurate data collection, data within the team set up to assist member correspondent data mining "Times" visual information produced in accordance with 'a data mining a given topic edited data into a drawing of a draft "the order, different invitation text field correspondent involved.
After the news will obscure the visualization of data in graphic form presented to the reader, because the image of the chart itself and intuitive, so that the relationship between the data to show the reader can see from the comparison between the data, mining the data contained the depth of meaning.
Seemingly unrelated to the data, in accordance with the order of time and space in turn arranged in different patterns and colors to express the contrast between the data to be presented at once, this is the role of the intuitive text news simple data list can not be achieved of.
Holographic data stroge.
In order to ensure that detailed and accurate data collection, data within the team set up to assist member correspondent data mining "Times" visual information produced in accordance with 'a data mining a given topic edited data into a drawing of a draft "the order, different invitation text field correspondent involved.
After the news will obscure the visualization of data in graphic form presented to the reader, because the image of the chart itself and intuitive, so that the relationship between the data to show the reader can see from the comparison between the data, mining the data contained the depth of meaning.
Seemingly unrelated to the data, in accordance with the order of time and space in turn arranged in different patterns and colors to express the contrast between the data to be presented at once, this is the role of the intuitive text news simple data list can not be achieved of.
Holographic data stroge.
Online since: June 2015
Authors: S. Madhu, M. Balasubramanian
The optimum erosion rate occurred at impact angles between of 200–300 when machining the aluminum Al-6061, 316 stainless steel and Ti–6Al–4V alloy and the abrasive powder is the Al2O3 the size is 50 µm [13] [19]
2.0 EXPERIMENTAL BACKROUND
Table -1 Process Parameters on the Glass specimens of different thickness
S.No
AJM Parameter
Condition
1
Type of abrasive
alumina
2
Abrasive size
0.15-1.25 mm
3
Jet pressure
5.5-7.5 k g/cm 2
4
Nozzle tip distance
6-18 mm
Franz invented this novel technology to cut laminated paper tubes in 1968 and was first introduced as a commercial system in 1983.Various readings were taken for different process parameters on the glass specimens of different thickness and all results were compared to the theoretical value and also check the validity of our results which were listed in the paper [7]. [15] Small metal removal rates at a low NTD is due to a reduction in nozzle pressure with decreasing distance, whereas a drop in material removal rate at large
NTD is due to a reduction in the jet velocity with increasing the nozzle distance [2].
TABLE 3 MECHANICS OF MATERIAL REMOVAL MECHANICS OF METALREMOVAL BRITTLE FRACTURE BY IMPINGING ABRASIVE GRAINS AT HIGH SPEED Carrier gas Air , carbon –dioxide Abrasives Alumina , SiC Pressure 2-10 atm Nozzle WC, sapphire, Abrasive flow rate and velocity, nozzle tip distance Critical parameters abrasive grain size Material application Hard and brittle metals ,alloys, and non metallic The above mentioned characteristic datas were used while conducting the experiment.
The experimental data show, Moreover, using small grain size of SiC abrasive (Mesh size 200) and higher air pressure would promote the material removal effects to obtain a larger MRR [13], [19].Based on the process parameters the Effect of abrasive flow rate, grain size, exit gas velocity, abrasive particle density, Mixing ratio, Nozzle pressure, Standoff distance, angle, Blasting time will be investigated [23] [3].
From the experimental data, it has been found that the effects Process parameters (Air pressure, abrasive mass flow rate, nozzle diameter, nozzle standoff distance) are in the same fashion as reported in previous studies for glass and other materials [17].
NTD is due to a reduction in the jet velocity with increasing the nozzle distance [2].
TABLE 3 MECHANICS OF MATERIAL REMOVAL MECHANICS OF METALREMOVAL BRITTLE FRACTURE BY IMPINGING ABRASIVE GRAINS AT HIGH SPEED Carrier gas Air , carbon –dioxide Abrasives Alumina , SiC Pressure 2-10 atm Nozzle WC, sapphire, Abrasive flow rate and velocity, nozzle tip distance Critical parameters abrasive grain size Material application Hard and brittle metals ,alloys, and non metallic The above mentioned characteristic datas were used while conducting the experiment.
The experimental data show, Moreover, using small grain size of SiC abrasive (Mesh size 200) and higher air pressure would promote the material removal effects to obtain a larger MRR [13], [19].Based on the process parameters the Effect of abrasive flow rate, grain size, exit gas velocity, abrasive particle density, Mixing ratio, Nozzle pressure, Standoff distance, angle, Blasting time will be investigated [23] [3].
From the experimental data, it has been found that the effects Process parameters (Air pressure, abrasive mass flow rate, nozzle diameter, nozzle standoff distance) are in the same fashion as reported in previous studies for glass and other materials [17].
Online since: October 2010
Authors: Shou Xi Chai, Qian Shi
The reduction rate of water absorption was the greatest when the rice straw was soaked in seawater after SH agent for 14-day and which had the biggest maximum elongation and maximum tension yet.
Basic steps of grey correlative method are as follows: analyzing the data and setting an ideal sequence as the reference system, if there is a sequence that is the closest to the ideal sequence, it has the largest relative degree and it is the optimal scheme.
Liu analyzed the experimental data of chemical ingredients and slaking index by using grey correlative method [18].
Experimental Data Experimental data of water absorption, maximum elongation and maximum tension of rice straw which soaked in seawater, running water and seawater after SH agent for different time are shown in Table 1.
The reduction rate of water absorption is the greatest when the rice straw is soaked in seawater after SH agent for 14-day.
Basic steps of grey correlative method are as follows: analyzing the data and setting an ideal sequence as the reference system, if there is a sequence that is the closest to the ideal sequence, it has the largest relative degree and it is the optimal scheme.
Liu analyzed the experimental data of chemical ingredients and slaking index by using grey correlative method [18].
Experimental Data Experimental data of water absorption, maximum elongation and maximum tension of rice straw which soaked in seawater, running water and seawater after SH agent for different time are shown in Table 1.
The reduction rate of water absorption is the greatest when the rice straw is soaked in seawater after SH agent for 14-day.