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Online since: April 2021
Authors: Gennady A. Sukhochev, Vasiliy N. Sokolnikov, Andrey M. Nekrylov
This work presents the research and development data in the field of finishing and hardening processes for parts with complicated shape surface.
Vorontsov and his school [13] there is the information about oxide film thickness on titanium (0,1-0,3 mm) and the data confirms our investigations.
While choosing the voltage, the data of Fig.2 should be taking into account.
The experimental data (curve 4) confirm the calculations on the initial sector approximately within 5 minutes before machining, than the discrepancy becomes more significant.
Maximum residual compressive stresses [18]: (13) where К6 is coefficient taking into account ratio of modules of elasticity for the part and specimen materials; К7 is coefficient of reduction which equals to ratio of flexures of specimens made of the part and test specimen materials; К8 is differentiable coefficient taking into account vibration of geometry, roughness and mechanical properties of the part and specimens materials.
Vorontsov and his school [13] there is the information about oxide film thickness on titanium (0,1-0,3 mm) and the data confirms our investigations.
While choosing the voltage, the data of Fig.2 should be taking into account.
The experimental data (curve 4) confirm the calculations on the initial sector approximately within 5 minutes before machining, than the discrepancy becomes more significant.
Maximum residual compressive stresses [18]: (13) where К6 is coefficient taking into account ratio of modules of elasticity for the part and specimen materials; К7 is coefficient of reduction which equals to ratio of flexures of specimens made of the part and test specimen materials; К8 is differentiable coefficient taking into account vibration of geometry, roughness and mechanical properties of the part and specimens materials.
Online since: July 2013
Authors: Yuan Cheng
Collected a large number of data from 2003to 2011 of maintenance cost for mining dump truck, established the mathematical models of maintenance cost and forecast of economic life of mining dump truck through the method of mathematical statistics regression analysis, found the rule of operation, maintenance cost overhaul and renew, forecasted the economic life of mining dump truck scientifically for 11 years, according to the economic principle of overhaul , judged whether need third overhaul and provided a basis for evaluating the economic life of domestic mine use electric wheel trucks.
According to a large open pit mine 28 630E 254T large mine electric wheel car 2003-2011 operating data and maintenance costs, fitting for a life-cycle model car, accounting for 67% of the mining field in volumes use mine electric wheel car extensive representative and authenticity.
Collection the data 3 times before overhaul and after electric wheel car overhaul, purchase fee about 8.87 million Yuan.
Conclusions Based on a large open pit copper mine run electric wheel car, the maintenance of the actual situation, collected 28 units of ore stop with electric wheel vehicles 2003-2011 annual operating and maintenance cost data, comprehensive economic management theory of modern equipment, the mathematical statistical regression analysis., to establish a mathematical model of the cost of day-to-day maintenance of the mine electric wheel car.
K. et al.An assessment of drag reduction devices for heavy trucks using design of experiments and computational fluid dynamics.
According to a large open pit mine 28 630E 254T large mine electric wheel car 2003-2011 operating data and maintenance costs, fitting for a life-cycle model car, accounting for 67% of the mining field in volumes use mine electric wheel car extensive representative and authenticity.
Collection the data 3 times before overhaul and after electric wheel car overhaul, purchase fee about 8.87 million Yuan.
Conclusions Based on a large open pit copper mine run electric wheel car, the maintenance of the actual situation, collected 28 units of ore stop with electric wheel vehicles 2003-2011 annual operating and maintenance cost data, comprehensive economic management theory of modern equipment, the mathematical statistical regression analysis., to establish a mathematical model of the cost of day-to-day maintenance of the mine electric wheel car.
K. et al.An assessment of drag reduction devices for heavy trucks using design of experiments and computational fluid dynamics.
Online since: April 2011
Authors: Matthias Haase, Alex Amato
The simulation results were validated with measured data of air temperature regimes and different solar radiation in an existing ventilated double-skin façade.
Methodology A detailed window model has been incorporated into the TYPE 56 component using output data from the WINDOW 4.1 program, developed by Lawrence Berkeley Laboratory, USA [1].
Together with the thermal properties of the gas fillings and the conductivity and emissivity of the glazings, the optical data for the window is written to an ASCII file.
Using this interpolated data, the transmission of solar radiation and the total absorption of shortwave radiation for each window pane is calculated.
The simulation results were validated with measured data of air temperature regimes and different solar radiation in an existing ventilated double-skin façade.
Methodology A detailed window model has been incorporated into the TYPE 56 component using output data from the WINDOW 4.1 program, developed by Lawrence Berkeley Laboratory, USA [1].
Together with the thermal properties of the gas fillings and the conductivity and emissivity of the glazings, the optical data for the window is written to an ASCII file.
Using this interpolated data, the transmission of solar radiation and the total absorption of shortwave radiation for each window pane is calculated.
The simulation results were validated with measured data of air temperature regimes and different solar radiation in an existing ventilated double-skin façade.
Online since: October 2013
Authors: Hong Yuan Huo, Li Sun, Li Sha Song, Chen Jie Cao
Based on the test data, the changes of above basic properties of SFRC are analyzed in view of the effects of the fraction of steel fiber by volume and the thickness of cement paste wrapping steel fibers.
Unfortunately, the design of mix proportion of concrete still relies on the empirical and test data.
The comparisons of test and calculation data are shown in Fig. 7.
Table 5 Statistical results of coefficients αt αtm CF40 CF50 CF60 CF40 CF50 CF60 0.364 0.434 0.366 0.398 0.265 0.215 Fig. 7 Statistical analyses of test data Conclusions The steel fiber reinforced concrete (SFRC) was designed by the binary superposition mix proportion method with three different strength grades, which considered the key parameters such as the fraction of steel fiber by volume, the thickness of cement paste wrapping steel fibers.
Based on the statistical analyses of test data, the effect coefficients of steel fiber on tensile and flexural-tensile strengths of SFRC in the formulas specified in current specification for steel fiber reinforced concrete structures were given out.
Unfortunately, the design of mix proportion of concrete still relies on the empirical and test data.
The comparisons of test and calculation data are shown in Fig. 7.
Table 5 Statistical results of coefficients αt αtm CF40 CF50 CF60 CF40 CF50 CF60 0.364 0.434 0.366 0.398 0.265 0.215 Fig. 7 Statistical analyses of test data Conclusions The steel fiber reinforced concrete (SFRC) was designed by the binary superposition mix proportion method with three different strength grades, which considered the key parameters such as the fraction of steel fiber by volume, the thickness of cement paste wrapping steel fibers.
Based on the statistical analyses of test data, the effect coefficients of steel fiber on tensile and flexural-tensile strengths of SFRC in the formulas specified in current specification for steel fiber reinforced concrete structures were given out.
Online since: January 2015
Authors: Tong Li, Fan Yang, Xu Sheng Zhuo, Dan Dan Wang
Based on the experiences of technical experts and operation data analysis, an expert rules system with wide coverage range was developed, which composed of the logical relationships between the coal feed flow rate, bed temperature and the primary air flow rate in various operation conditions.
The core of reference governor is an expert system based on the operators’ experiences and the real data analysis.
Control System of Primary Air 2.1 Expert System The expert system is the main framework of reference governor and consists of data acquisition and quantization part, knowledge base part and inference engine part.
ForΔFC, “+”means increase, “-”means reduction.
Knowledge base part: it stores the special knowledge which comes from the operator’s experience and real data analysis to regulate the instruction of primary air fan.
The core of reference governor is an expert system based on the operators’ experiences and the real data analysis.
Control System of Primary Air 2.1 Expert System The expert system is the main framework of reference governor and consists of data acquisition and quantization part, knowledge base part and inference engine part.
ForΔFC, “+”means increase, “-”means reduction.
Knowledge base part: it stores the special knowledge which comes from the operator’s experience and real data analysis to regulate the instruction of primary air fan.
Online since: May 2020
Authors: L.P. Aref'eva, Viktor N. Pustovoit, Yuri V. Dolgachev
Experimental data show that after quenching in a magnetic field, a decrease in the volumetric strain of the transformation, an increase in the dispersity of packets of martensitic crystals and components of the packets are observed.
Introduction The data of [1-6] show that when exposed to a constant magnetic field during steel quenching, the rate of martensitic transformation (especially in the early stages of the reaction) increases up to 1.5 times.
Martensite relief and the corresponding interference pattern, ´500: a - quenching without a field; b - quenching in a magnetic field of 1.6 MA/m The polygons of the distribution of the value of constructed from the data of 250 measurements are shown in Fig. 4.
Here there is a good correlation with the data on the specific surface (Table 1).
Conclusions Thus, the experimental data show that after quenching in a magnetic field, a decrease in the volume strain of the transformation, an increase in the dispersity of the packets of martensitic crystals and the components of the battens, is observed.
Introduction The data of [1-6] show that when exposed to a constant magnetic field during steel quenching, the rate of martensitic transformation (especially in the early stages of the reaction) increases up to 1.5 times.
Martensite relief and the corresponding interference pattern, ´500: a - quenching without a field; b - quenching in a magnetic field of 1.6 MA/m The polygons of the distribution of the value of constructed from the data of 250 measurements are shown in Fig. 4.
Here there is a good correlation with the data on the specific surface (Table 1).
Conclusions Thus, the experimental data show that after quenching in a magnetic field, a decrease in the volume strain of the transformation, an increase in the dispersity of the packets of martensitic crystals and the components of the battens, is observed.
Online since: December 2014
Authors: Su Su, Jiu Chun Jiang, Wei Wang, Mei Huang, Vassilios G. Agelidis, Xiao Chao Jiang
The load model of BSS is built based on the operation analysis of BSS and the charging data of batteries.
The data of this case is the typical operation data of the NO.90 buses in the Beitucheng BSS.
The load demand of DN is from the typical load data of the Haidian District, which is scaled down 100 times to study in this case.
When EBs return the BSS, over 90% of the batteries’ SOC is about 0.45 according to operation data. 3) Charging power: the rated charging power of the battery in vehicle is 52KW. 4) Time for swapping battery: 10 minutes. 5) Charging duration: According to the actual charging data of the Mengguli battery and the set SOC when batteries return, fully charged takes 2 hours and 20 minutes. 6) Operating schedule: the actual operating schedule in the Beitucheng BSS.
Seen from the data in Table 3, observe that the charging costs of the scheme for coordinated charging is ¥1930.4 less than the charging costs of CIAR mode.
The data of this case is the typical operation data of the NO.90 buses in the Beitucheng BSS.
The load demand of DN is from the typical load data of the Haidian District, which is scaled down 100 times to study in this case.
When EBs return the BSS, over 90% of the batteries’ SOC is about 0.45 according to operation data. 3) Charging power: the rated charging power of the battery in vehicle is 52KW. 4) Time for swapping battery: 10 minutes. 5) Charging duration: According to the actual charging data of the Mengguli battery and the set SOC when batteries return, fully charged takes 2 hours and 20 minutes. 6) Operating schedule: the actual operating schedule in the Beitucheng BSS.
Seen from the data in Table 3, observe that the charging costs of the scheme for coordinated charging is ¥1930.4 less than the charging costs of CIAR mode.
Online since: October 2025
Authors: Riska Rachmantyo, Lia Amelia Tresna Wulan Asri, Richard Adventus Hutasoit
Based on data from 1950 to 2015, the number of plastics produced worldwide has exceeded 400 million tonnes per year[2,3].
In addition, test results showed that calculated data tend to be lower than theoretical data, as most concrete samples made during this study showed surface irregularities, especially on top of samples.
It is known that the specimens with plastic aggregates can be classified as lightweight concrete based on the overall data of the density test results of the specimens.
In direct proportion to the reduction in density of the 50% plastic specimen.
From the overall compression test data, it can be concluded that the 25% plastic aggregate concrete meets the strength for lightweight applications.
In addition, test results showed that calculated data tend to be lower than theoretical data, as most concrete samples made during this study showed surface irregularities, especially on top of samples.
It is known that the specimens with plastic aggregates can be classified as lightweight concrete based on the overall data of the density test results of the specimens.
In direct proportion to the reduction in density of the 50% plastic specimen.
From the overall compression test data, it can be concluded that the 25% plastic aggregate concrete meets the strength for lightweight applications.
Online since: December 2012
Authors: Tasnim Firdaus Ariff, Nurul Syamira Shafie, Zamzahariah Mahamad Zahir
Nevertheless, reduction of wear rate by 38 to 57% was found from wet machining.
Data were extrapolated (up to maximum flank wear of 0.3 mm), graphs were plotted, tool life for Si3N4 tool was analyzed and optimum cutting conditions were found.
However, for the wet machining, there is a reduction of 0 - 28.5 % and 0 - 12.6 % in tool wear intensity of Si3N4 tool for the lower and higher cutting parameters respectively (Fig. 3).
The data for MRR values can be seen in Table 1.
Data were extrapolated (up to maximum flank wear of 0.3 mm), graphs were plotted, tool life for Si3N4 tool was analyzed and optimum cutting conditions were found.
However, for the wet machining, there is a reduction of 0 - 28.5 % and 0 - 12.6 % in tool wear intensity of Si3N4 tool for the lower and higher cutting parameters respectively (Fig. 3).
The data for MRR values can be seen in Table 1.
Online since: December 2012
Authors: Yun Zhang, Xin Ke, Ying Sun
By max fixatives into the soil adjusted or changed physical and chemical properties of Cr and produce precipitation adsorption ion-exchange humification and oxidation-reduction series reaction ,situ stabilization is one of treatment methods for physical-chemical, consequently reducing mobility and bioavailability in the soil environment , thereby decreasing the toxicity hazards of Cr elements on plants and animals[5].
Data processing.Data use Sigmaplot 8.0 software for statistical analysis Results and discussion Study on leaching chromium in the soil before and after fixation. 0.00% 20.00% 40.00% 60.00% 80.00% 100.00% Unfixed Fixed Cr residual rate % Cr leaching rate % Fig. 1 The total leaching ratio of Cr before and after fixation Fig.1 illustrates the total leaching ratio of Cr before and after fixation.
MgO produces alkaline environment and strong reduction of Fe2 +SO42-,conducive to Cr (Ⅵ) is converted to Cr (III).
Data processing.Data use Sigmaplot 8.0 software for statistical analysis Results and discussion Study on leaching chromium in the soil before and after fixation. 0.00% 20.00% 40.00% 60.00% 80.00% 100.00% Unfixed Fixed Cr residual rate % Cr leaching rate % Fig. 1 The total leaching ratio of Cr before and after fixation Fig.1 illustrates the total leaching ratio of Cr before and after fixation.
MgO produces alkaline environment and strong reduction of Fe2 +SO42-,conducive to Cr (Ⅵ) is converted to Cr (III).