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Online since: July 2019
Authors: Małgorzata Musztyfaga-Staszuk
Sample printouts of the original measurement data are presented in figure 1.
The printout of the original data after the lifetime measurement of charge carriers by the method of photoconductivity decay in a pseudo-fixed state at the WCT-120 stand by Sinton Cons.
After rolling, a significant reduction in agglomerates was noted.
The data was obtained under AM1.5 global spectrum at 1000 W/m2 light intensity at temperature 25oC.
Woodhouse, A wafer-based monocrystalline silicon photovoltaics road map: Utilizing known technology improvement opportunities for further reductions in manufacturing costs.
The printout of the original data after the lifetime measurement of charge carriers by the method of photoconductivity decay in a pseudo-fixed state at the WCT-120 stand by Sinton Cons.
After rolling, a significant reduction in agglomerates was noted.
The data was obtained under AM1.5 global spectrum at 1000 W/m2 light intensity at temperature 25oC.
Woodhouse, A wafer-based monocrystalline silicon photovoltaics road map: Utilizing known technology improvement opportunities for further reductions in manufacturing costs.
Online since: May 2012
Authors: Xiao Hui Zhang, Jia Yuan Zhang, Yu Hua Xiang
The air preheater is with the tube air heater, and the steam temperature control is self-condensation water temperature reduction.
The boiler is equipped with two pressure fans and two draft fans, the main design parameters and combustion characteristics of the boiler are respectively shown in table 1 and table 2 Table 1 Main design parameters of the boiler no. project Name symbol unit data 1 boiler evaporation(MCR) D t/h 170 2 pressure superheated steam P MPa 9.8 3 superheated steam temperature t ℃ 540 4 enter water temperature tgs ℃ 215 5 hot air temperature trf ℃ 366 6 exhaust gas temperature ℃ 145 7 boiler thermal efficiency η % 90.5 Table 2 The design fuel features of the boiler Composition Car/% Har/% Oar/% Nar/% Sar/% Aar/% Mar/% Vdaf/% Qnet.ar/(kJ/kg) Content data 63.15 3.04 4.2 1.14 0.73 22.74 5 .0 11.15 24089 The test principles and methods Air outlet damper characteristic test The air outlet damper characteristic is the relationship of the throttle plate opening and the wind speed (wind flow), and is controlled by adjusting the throttle plate opening and the wind speed flow [8,10-12], so
By using the Pitot tube, differential pressure gauge and hot-wire measuring anemometer and maintaining a certain pressure, the speed (or dynamic pressure value) of different baffle opening or ducts was measured at the outlet of ventilation door baffle and the blower and draft fan baffle, the baffle opening is from 0 to 100% (usually data: 0%, 20% , 40%, 60%, 80%, 100%), and the corresponding curve was drawn.
The principles and methods of boiler cold simulation The purpose of the boiler cold test is to comprehensively examine and understand the boiler combustion system and cold actual operating performance of auxiliary equipment, and provide necessary basic data for boiler ignition, hot state operating and preventing slagging accident.
Technical reformation and experimental analysis on NOx exhaust reduction by classifired combustion at boiler[J].
The boiler is equipped with two pressure fans and two draft fans, the main design parameters and combustion characteristics of the boiler are respectively shown in table 1 and table 2 Table 1 Main design parameters of the boiler no. project Name symbol unit data 1 boiler evaporation(MCR) D t/h 170 2 pressure superheated steam P MPa 9.8 3 superheated steam temperature t ℃ 540 4 enter water temperature tgs ℃ 215 5 hot air temperature trf ℃ 366 6 exhaust gas temperature ℃ 145 7 boiler thermal efficiency η % 90.5 Table 2 The design fuel features of the boiler Composition Car/% Har/% Oar/% Nar/% Sar/% Aar/% Mar/% Vdaf/% Qnet.ar/(kJ/kg) Content data 63.15 3.04 4.2 1.14 0.73 22.74 5 .0 11.15 24089 The test principles and methods Air outlet damper characteristic test The air outlet damper characteristic is the relationship of the throttle plate opening and the wind speed (wind flow), and is controlled by adjusting the throttle plate opening and the wind speed flow [8,10-12], so
By using the Pitot tube, differential pressure gauge and hot-wire measuring anemometer and maintaining a certain pressure, the speed (or dynamic pressure value) of different baffle opening or ducts was measured at the outlet of ventilation door baffle and the blower and draft fan baffle, the baffle opening is from 0 to 100% (usually data: 0%, 20% , 40%, 60%, 80%, 100%), and the corresponding curve was drawn.
The principles and methods of boiler cold simulation The purpose of the boiler cold test is to comprehensively examine and understand the boiler combustion system and cold actual operating performance of auxiliary equipment, and provide necessary basic data for boiler ignition, hot state operating and preventing slagging accident.
Technical reformation and experimental analysis on NOx exhaust reduction by classifired combustion at boiler[J].
Online since: December 2023
Authors: Ming Jen Tan, Yi Wei Daniel Tay
Gathering data: The next step is to gather data on the product's energy consumption, raw materials, transportation, and other inputs.
This data can be obtained from suppliers, energy bills, and other sources. 3.
Calculating emissions: Once the data has been collected, emissions can be calculated using standard emission factors or life cycle assessment (LCA) methods.
When comparing a Distributed Manufacturing System (DMS) which a 3D Printing technology allows, printing just-in-place or in a cottage industry setting, with a Centralised Manufacturing System (CMS) which has driven industrialization and driven down costs by making everything in the most cost-effective place with an economy of scale concept, i.e. concentrating on productivity, Cerdas et al [10] explained that DMS may potentially reduce pollution through reduction of global transport compared to CMS’ high global flows of goods and materials, which in turn results in high pollution and waste of energy [11].
(b) Maintenance and running costs through better designs enabled by 3D Printing – e.g. better ventilation, lighting, keeping warm in winter and cool in summer through better designs (e.g. using lattices) An attempt to look at both the economic and environmental standpoints [15] when comparing 3D Printing of a bathroom unit with a traditional precast approach, based on (i) economic cost, (ii) environmental impact ( CO2 emission) and (iii) productivity, found a reduction of 34.1%, 85.9% and 87.1% respectively.
This data can be obtained from suppliers, energy bills, and other sources. 3.
Calculating emissions: Once the data has been collected, emissions can be calculated using standard emission factors or life cycle assessment (LCA) methods.
When comparing a Distributed Manufacturing System (DMS) which a 3D Printing technology allows, printing just-in-place or in a cottage industry setting, with a Centralised Manufacturing System (CMS) which has driven industrialization and driven down costs by making everything in the most cost-effective place with an economy of scale concept, i.e. concentrating on productivity, Cerdas et al [10] explained that DMS may potentially reduce pollution through reduction of global transport compared to CMS’ high global flows of goods and materials, which in turn results in high pollution and waste of energy [11].
(b) Maintenance and running costs through better designs enabled by 3D Printing – e.g. better ventilation, lighting, keeping warm in winter and cool in summer through better designs (e.g. using lattices) An attempt to look at both the economic and environmental standpoints [15] when comparing 3D Printing of a bathroom unit with a traditional precast approach, based on (i) economic cost, (ii) environmental impact ( CO2 emission) and (iii) productivity, found a reduction of 34.1%, 85.9% and 87.1% respectively.
Online since: July 2017
Authors: Sergey Sidelnikov, Nikolay Dovzhenko, Ivan Dovzhenko, Roman Galiev
The data for calculating the feasibility and energy-power parameters of the process CRE
Value
Unit
CRE-200
Unit
CCRE-2,5
Unit
CCRE-4
The dimensionless parameter
Roll diameter with protrusion D1, mm
214.0
462.0
428.0
-
Roll diameter with groove D2, mm
164.0
394.0
428.0
-
Minimum height gauge h, mm
7.0
10.0
19.0
-
Average diameter of the rolls D0, mm
189.0
428.0
428.0
The width of the caliber b, mm
15.0
22.0
42.0
Starting billet height h0, mm
14.0
20.0
42.0
Starting billet width b0, mm
14.0
20.0
40.0
Matrix surface height hм, mm
20.0
25.0
31.0
Diameter of extruded product d , mm
9
9
9
Theoretical research
Theoretical analysis of the process combined rolling-extrusion [13] have shown, that for realization of the process should be carried out the power balance condition, that is the total capacity of subsumed active friction forces Na must be equal (or more) to power of reactive forces Nr, spent on the implementation of deformation and overcoming friction in the deformation zone
Fig. 2 shows data for this calculation method for obtaining rods made of aluminium alloy 6063 depending on various conditions of contact friction with a metal roll and the matrix (ψм - rate of friction on the surface of the matrix, ψn - rate of friction on the belt of matrix ψв and ψcm - friction indices, respectively, on the surface of roll and the walls of roll with a groove) by the method of combined rolling-extrusion on different units (Table 1).
Analysis of the data shown in Fig. 2 shows that the diameter of the rolls (Fig. 2 a, b) a significant impact on increasing the feasibility of the process.
Energy-power parameters during machining of aluminium alloy 6063 on the units of combined machining Parameter Tb=400 оC Tb=540 оC m=4.4 m=7.3 m=14.3 m=4.4 m=7.3 m=14.3 Unit CRE-200 ξ = 0.23 sec-1 Рroll, kN 121 127 134 59 62 65 Рmatr, kN 71 95 128 35 46 62 ξ = 0.81 sec -1 Рroll, kN 152 160 169 75 79 83 Рmatr, kN 90 120 161 44 59 80 Unit CCRE-2,5 ξ = 0.23 sec -1 Рroll, kN 249 263 276 121 128 134 Рmatr, kN 100 134 180 49 65 88 ξ = 0.81 sec -1 Рroll, kN 312 330 347 155 163 172 Рmatr, kN 126 168 226 62 83 112 Unit CCRE-4 ξ = 0.23 sec -1 Рroll, kN 621 656 690 302 319 335 Рmatr, kN 313 418 562 152 203 273 ξ = 0.81 sec -1 Рroll, kN 781 824 867 386 407 428 Рmatr, kN 394 526 707 195 260 349 Analysis of calculated data showed that for caliber with dimensions in minimum cross-section 7×15 mm and temperature 400 оC force on the rolls does not exceed 200 kN, and the force on the matrix does not exceed 182 kN.
Increasing the temperature to 540 оC leads to a further reduction of efforts, and growth of a strain rate (speed of rotation of the rolls) to the growth of energy-power parameters of the process CRE because of speed metal hardening.
Fig. 2 shows data for this calculation method for obtaining rods made of aluminium alloy 6063 depending on various conditions of contact friction with a metal roll and the matrix (ψм - rate of friction on the surface of the matrix, ψn - rate of friction on the belt of matrix ψв and ψcm - friction indices, respectively, on the surface of roll and the walls of roll with a groove) by the method of combined rolling-extrusion on different units (Table 1).
Analysis of the data shown in Fig. 2 shows that the diameter of the rolls (Fig. 2 a, b) a significant impact on increasing the feasibility of the process.
Energy-power parameters during machining of aluminium alloy 6063 on the units of combined machining Parameter Tb=400 оC Tb=540 оC m=4.4 m=7.3 m=14.3 m=4.4 m=7.3 m=14.3 Unit CRE-200 ξ = 0.23 sec-1 Рroll, kN 121 127 134 59 62 65 Рmatr, kN 71 95 128 35 46 62 ξ = 0.81 sec -1 Рroll, kN 152 160 169 75 79 83 Рmatr, kN 90 120 161 44 59 80 Unit CCRE-2,5 ξ = 0.23 sec -1 Рroll, kN 249 263 276 121 128 134 Рmatr, kN 100 134 180 49 65 88 ξ = 0.81 sec -1 Рroll, kN 312 330 347 155 163 172 Рmatr, kN 126 168 226 62 83 112 Unit CCRE-4 ξ = 0.23 sec -1 Рroll, kN 621 656 690 302 319 335 Рmatr, kN 313 418 562 152 203 273 ξ = 0.81 sec -1 Рroll, kN 781 824 867 386 407 428 Рmatr, kN 394 526 707 195 260 349 Analysis of calculated data showed that for caliber with dimensions in minimum cross-section 7×15 mm and temperature 400 оC force on the rolls does not exceed 200 kN, and the force on the matrix does not exceed 182 kN.
Increasing the temperature to 540 оC leads to a further reduction of efforts, and growth of a strain rate (speed of rotation of the rolls) to the growth of energy-power parameters of the process CRE because of speed metal hardening.
Online since: February 2017
Authors: Marek Danielewski, Bartek Wierzba, Katarzyna Tkacz-Śmiech, Bogdan Bożek
Simulated results on expanded austenite growth in nitrided stainless steels are presented and compared with literature data.
It is characteristic for nitrogen diffusion in expanded austenite that it is much faster than expected from earlier data on N diffusion in austenitic phase.
Apparently, also for nitrogen contents lower than that reflected by kCrN, the dissolved nitrogen atoms can be removed by hydrogen reduction at elevated temperatures.
For the entire composition range, the concentration dependence of the diffusivity of nitrogen in expanded austenite was approximated by fitting an appropriate function through the experimental data.
Very good agreement of all three sets of data is seen.
It is characteristic for nitrogen diffusion in expanded austenite that it is much faster than expected from earlier data on N diffusion in austenitic phase.
Apparently, also for nitrogen contents lower than that reflected by kCrN, the dissolved nitrogen atoms can be removed by hydrogen reduction at elevated temperatures.
For the entire composition range, the concentration dependence of the diffusivity of nitrogen in expanded austenite was approximated by fitting an appropriate function through the experimental data.
Very good agreement of all three sets of data is seen.
Online since: June 2021
Authors: Zi Ming Wang, Xiao Liu, Su Ping Cui, Chun Lei Xia, Yun Sheng Zheng, Xiao Fei Song, Qi Feng Luo
The main reason is that the formation of the calcium chelated complexes generated from -COO- of PCE and Ca2+ leads to the reduction of Ca2+ and further the inhibition of nucleation growth of the hydration products such as C-S-H and Ca(OH)2[6,7].
After determining the equilibrium adsorption time and the equilibrium adsorption amount, the pseudo first order kinetic model was used to fit the time-varying data of the adsorption capacity of sample A, B and C on the surfaces of cement particles.
From Fig. 5, it was interesting that the adsorption process of these three samples on cement surfaces could be well described by pseudo first order kinetic equation model due to the good fitting of these adsorption data, with the correlation coefficient R2 of 0.95948, 0.91613 and 0.91272, respectively.
The essential data are shown in Table 3.
(2) Compared with PCE prepared by common solvent polymerization, PCE novelly prepared by non-solvent polymerization is beneficial to the delay of hydration process and the reduction of hydration heat.
After determining the equilibrium adsorption time and the equilibrium adsorption amount, the pseudo first order kinetic model was used to fit the time-varying data of the adsorption capacity of sample A, B and C on the surfaces of cement particles.
From Fig. 5, it was interesting that the adsorption process of these three samples on cement surfaces could be well described by pseudo first order kinetic equation model due to the good fitting of these adsorption data, with the correlation coefficient R2 of 0.95948, 0.91613 and 0.91272, respectively.
The essential data are shown in Table 3.
(2) Compared with PCE prepared by common solvent polymerization, PCE novelly prepared by non-solvent polymerization is beneficial to the delay of hydration process and the reduction of hydration heat.
Online since: February 2014
Authors: A.N. Mustafizul Karim, R.A. Sarker, H.M. Emrul Kays, M. Abdesselam
Introduction
Over the last few decades, Exponential Smoothing (ES) methods have been recognized as one of the most popular approaches for forecasting the time series data[1, 2].
As presented in Fig. 1, the demand data of distribution transformer tank (750 KV) for a three-year period were collected from a local manufacturing industry.
A noticeable reduction in the deviation of the forecasted values from the actual demand is obtained through the fuzzy growth adjusted Holt-Winters (FGAHW) method.
Vercher, A decision support system methodology for forecasting of time series based on soft computing, Computational Statistics & Data Analysis. 51 (2006) 177 – 191
Vercher, Holt–Winters Forecasting: An Alternative Formulation Applied to UK Air Passenger Data, Journal of Applied Statistics. 34:9 (2007) 1075–1090
As presented in Fig. 1, the demand data of distribution transformer tank (750 KV) for a three-year period were collected from a local manufacturing industry.
A noticeable reduction in the deviation of the forecasted values from the actual demand is obtained through the fuzzy growth adjusted Holt-Winters (FGAHW) method.
Vercher, A decision support system methodology for forecasting of time series based on soft computing, Computational Statistics & Data Analysis. 51 (2006) 177 – 191
Vercher, Holt–Winters Forecasting: An Alternative Formulation Applied to UK Air Passenger Data, Journal of Applied Statistics. 34:9 (2007) 1075–1090
Online since: September 2014
Authors: Zha Xi Qu Pei, Chun Jie Li, Gui Xian Xu, Yong Ji Li, Yue Ma, Xiao Lan Ma
In addition, this method could improve data transmission in the semantic web net effect.
But the generality of this method was poorer, depending on the initial data set.
Semantic similarity calculation can be applied to text clustering algorithm, web information credible analysis, as well as the feature dimension reduction.
Fast and accurate text classification via multiple linear discriminant projections, Int’l Journal on Very Large Data Bases. 2003, 12(2), 170−185
Proc. of the 8th ACM Int’l Conf. on Knowledge Discovery and Data Mining (SIGKDD-02).
But the generality of this method was poorer, depending on the initial data set.
Semantic similarity calculation can be applied to text clustering algorithm, web information credible analysis, as well as the feature dimension reduction.
Fast and accurate text classification via multiple linear discriminant projections, Int’l Journal on Very Large Data Bases. 2003, 12(2), 170−185
Proc. of the 8th ACM Int’l Conf. on Knowledge Discovery and Data Mining (SIGKDD-02).
Online since: December 2014
Authors: Zh.K. Kairbekov, A.S. Maloletnev, V.S. Yemelyanova, Zh.K. Myltykbaeva, B.B. Baizhomartov
The process of catalytic cracking is constantly improving, and the expense of new technological solutions and catalysts can reach the data described in the article: the yield of gasoline with a boiling point 205 °C – 51 mass % the total yield C3-C4 of gases – 16 mass %; the octane number MI – 94.2; sulfur content in petrol – 0.005 mass %.
Data in the Table 2 that the optimal number of shale added to the tar is 15.0 %.
Found that the reduction in response time from 60 to 30 min leads to decrease in the yield of gasoline fraction and an increase in the content of middle distillate products thermal cracking with bp. 200-370 °C.
Conditions: 425 °C, 5.0 MPa, shaken vigorously reactor Data Response time, min 30 60 120* 1.
Based on the experimental data the schematic diagram (Figure 1) thermal cracking the heavy oil residues with bp. 520 °C into motor fuel and raw materials for catalytic cracking.
Data in the Table 2 that the optimal number of shale added to the tar is 15.0 %.
Found that the reduction in response time from 60 to 30 min leads to decrease in the yield of gasoline fraction and an increase in the content of middle distillate products thermal cracking with bp. 200-370 °C.
Conditions: 425 °C, 5.0 MPa, shaken vigorously reactor Data Response time, min 30 60 120* 1.
Based on the experimental data the schematic diagram (Figure 1) thermal cracking the heavy oil residues with bp. 520 °C into motor fuel and raw materials for catalytic cracking.
Online since: December 2013
Authors: Shu Ru Liu, Zeng Yu Cai
If larger quantization standard is choosed, then the image quality will be poorer, but the total amount of data will be small; however if smaller quantization is chooosed, then the image qulality will be better, but the total amount of data will be larger.
The size of the amount of data will affect the number of data packets of each divided frame.
Furthermore the points, where data are tapped from the transmission flow are marked.
(3) VS(Video Sender): On the sender side the evaluation of these data is done, the raw uncompressed video can be large.
The evaluation of these data is done on the sender side.
The size of the amount of data will affect the number of data packets of each divided frame.
Furthermore the points, where data are tapped from the transmission flow are marked.
(3) VS(Video Sender): On the sender side the evaluation of these data is done, the raw uncompressed video can be large.
The evaluation of these data is done on the sender side.