Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: October 2014
Authors: Xiao Diao Huang, Chun Jian Yu, Shuang Ding
Mathematical model contained pose errors which converted cutter location data into machine motion coordinates was established based on inverse kinematics and the analytical solutions of NC code were derived.
Cutter location data is converted into motion coordinate of each axis based on the specific structure of machine tools by postprocessor and processing program is generated according to the control instruction format [6].C.H.
The relative orientation and position of the cutting tool with respect to the workpiece can be determined by multiplying the corresponding fundamental transformation matrices in series, and should be equal to the known CL data, [Kx Ky Kz 0]T and [Qx Qy Qz 1]T, respectively[7, 8 and 9].
The mathematical model which converts cutter location data into machine motion coordinates was established and analytical solutions of NC code were derived.
As a result of no approximate reduction, the post processing method is also applicable for the non-orthogonal table/spindle-tilting type 5-axis machine tools and has guiding significance for manufacturing of machine tools.
Cutter location data is converted into motion coordinate of each axis based on the specific structure of machine tools by postprocessor and processing program is generated according to the control instruction format [6].C.H.
The relative orientation and position of the cutting tool with respect to the workpiece can be determined by multiplying the corresponding fundamental transformation matrices in series, and should be equal to the known CL data, [Kx Ky Kz 0]T and [Qx Qy Qz 1]T, respectively[7, 8 and 9].
The mathematical model which converts cutter location data into machine motion coordinates was established and analytical solutions of NC code were derived.
As a result of no approximate reduction, the post processing method is also applicable for the non-orthogonal table/spindle-tilting type 5-axis machine tools and has guiding significance for manufacturing of machine tools.
Online since: June 2017
Authors: Gürol Önal, Ali Serhat Ersoyoglu, Kevser Dincer, Sadik Ata, Yusuf Yilmaz
When the results obtained from RBMTF and statistical analyses of experimental data have been compared, it has been determined that the two groups of data are coherent, and that there is not a significant difference between them.
Comparison of experimental data with RBMTF for the variation time of voltage values Fig. 2.
Comparison of experimental data with RBMTF for the variation of time with CV of voltage values Fig. 3.
The comparison between experimental data and fuzzy logic is done using statistical methods such as the coefficient of multiple determination (R2) are defined as follows, where n is the number of data patterns, yp,m indicates the predicted, tm,m is the actual value of one data point m, and m,m is the mean value of all actual data points [11].
The comparison between fuzzy logic and experimental data is done using coefficient of multiple determination.
Comparison of experimental data with RBMTF for the variation time of voltage values Fig. 2.
Comparison of experimental data with RBMTF for the variation of time with CV of voltage values Fig. 3.
The comparison between experimental data and fuzzy logic is done using statistical methods such as the coefficient of multiple determination (R2) are defined as follows, where n is the number of data patterns, yp,m indicates the predicted, tm,m is the actual value of one data point m, and m,m is the mean value of all actual data points [11].
The comparison between fuzzy logic and experimental data is done using coefficient of multiple determination.
Online since: June 2007
Authors: C. Mbohwa, G. Manjera
Problems centred on the non-availability of data.
Generally data was found to be sparse and lacking.
The primary data collected were aggregates per year of the data collected from the companies already mentioned in the methodology.
This greatly affected the data quality.
Opportunities for reduction of resource depletion and environmental pollution have been identified.
Generally data was found to be sparse and lacking.
The primary data collected were aggregates per year of the data collected from the companies already mentioned in the methodology.
This greatly affected the data quality.
Opportunities for reduction of resource depletion and environmental pollution have been identified.
Online since: September 2013
Authors: Shao Cong Zheng, Fei Xiang Cheng, Zhi Juan Wang
Production of SO2 and lime from phosphogypsum reduced
With lignite in a nitrogen atmosphere
Shaocong Zheng*, Feixiang Cheng, Zhijuan Wang
(College of Chemistry and Chemical Engineering, Qujing Normal University, Qujing 655011, China)
zhshcong2008@sina.com
Keywords: Phosphogypsum, Lignite, Reduced decomposition, Sulfur dioxide and lime
Abstract: In this study, using lignite as a reducer, the reaction characteristic of the reduction decomposition of phosphogypsum to SO2 and lime was investigated in a nitrogen atmosphere at different conditions.
A tube furnace was used to analyze the reductive decomposition process of PG mixed with lignite, and experimental data were collected to determine the optimum conditions for production SO2 and lime.
Data were collected to discuss the reaction mechanism.
Fig. 1 Schematic of the experimental apparatus 4.Results and Discussion 4.1 Effect of the Molar Proportions of Phosphogypsum and lignite Some earlier experimental data have shown that the mole ratio of PG and coal affected the decomposition process and the molar proportion of C:CaSO4=0.5-1.0 is suitable for the decomposition of phosphogypsum.
A tube furnace was used to analyze the reductive decomposition process of PG mixed with lignite, and experimental data were collected to determine the optimum conditions for production SO2 and lime.
Data were collected to discuss the reaction mechanism.
Fig. 1 Schematic of the experimental apparatus 4.Results and Discussion 4.1 Effect of the Molar Proportions of Phosphogypsum and lignite Some earlier experimental data have shown that the mole ratio of PG and coal affected the decomposition process and the molar proportion of C:CaSO4=0.5-1.0 is suitable for the decomposition of phosphogypsum.
Online since: November 2025
Authors: Tolia Kilasonia
The new notification system, developed for landslide-prone areas, provides: (1) measurement of ground displacement and relative slope, (2) measurement of constructions deformation and bulge, and (3) receiving, visualization, and processing of the collected data at the monitoring center.
These sensors send information to the server via the I2C Communication Protocol, and the server sends the information to the monitoring facility via the GSM module, where the program processes the received data.
It analyzes data and, based on the results of the analysis, if necessary, sends a message to the population about the expected danger.
The proposed system works with microcontroller software, and Visual Basic is used for GSM system and data analysis.
Mondal (Eds.), Civil Engineering for Disaster Risk Reduction, Springer Nature, Singapore, 2022, Ch. 10, pp. 129-145
These sensors send information to the server via the I2C Communication Protocol, and the server sends the information to the monitoring facility via the GSM module, where the program processes the received data.
It analyzes data and, based on the results of the analysis, if necessary, sends a message to the population about the expected danger.
The proposed system works with microcontroller software, and Visual Basic is used for GSM system and data analysis.
Mondal (Eds.), Civil Engineering for Disaster Risk Reduction, Springer Nature, Singapore, 2022, Ch. 10, pp. 129-145
Online since: May 2011
Authors: Xian Song Xie
The set consists of concrete model, displacement sensors, data adapter and recording system.
During the measurement, the specimen ends contact with the micrometer which is fixed to the test mode, Dial gauge data obtained through the SZ-DA 32-channel data adapter is stored in the PC.
When the fibers content increases from 0.5 kg/m3 to 0.9 kg/m3, the reduction rate is significantly improved; when the fibers content increases from 0.9 kg/m3 to 1.3 kg/m3, the reduction rate slightly increases, and the effect is not obvious.
During the measurement, the specimen ends contact with the micrometer which is fixed to the test mode, Dial gauge data obtained through the SZ-DA 32-channel data adapter is stored in the PC.
When the fibers content increases from 0.5 kg/m3 to 0.9 kg/m3, the reduction rate is significantly improved; when the fibers content increases from 0.9 kg/m3 to 1.3 kg/m3, the reduction rate slightly increases, and the effect is not obvious.
Online since: January 2012
Authors: Li Ping Zhou
People have realized the importance of the energy conservation and emission reduction.China undertakes the commitment of its 1.3 billion people.
The concept of energy conservation and emission reduction had been deeply rooted in the hearts of the people.
Thirdly, the government should collect the information of the enterprises' emission and emission trade, verify and publish some relevant emission data and trade data and establish the data base of the emission trade.
The concept of energy conservation and emission reduction had been deeply rooted in the hearts of the people.
Thirdly, the government should collect the information of the enterprises' emission and emission trade, verify and publish some relevant emission data and trade data and establish the data base of the emission trade.
Online since: April 2016
Authors: Serge Zhuiykov
The results obtained were similar to the previously published data for orthorhombic β-WO3.
The measured bandgap of exfoliated Q2D WO3 nano-flaked films was 2.60 eV, which was consistent with the reported data for bulk polycrystalline orthorhombic β-WO3 (from 2.62 21 to 2.90 eV) at room temperature.
Extra mechanical exfoliation, which is resulted in the formation of thinner nano-flakes in the films, resulted in the reduction of bandgap down to ~2.40 eV.
Collectively, these results confirm the presence of non-stoichiometric 2D WO3-x and the reduction of bandgap as a function of x.
This value correlates well with the previously published data for non-stoichiometric WO3-x.
The measured bandgap of exfoliated Q2D WO3 nano-flaked films was 2.60 eV, which was consistent with the reported data for bulk polycrystalline orthorhombic β-WO3 (from 2.62 21 to 2.90 eV) at room temperature.
Extra mechanical exfoliation, which is resulted in the formation of thinner nano-flakes in the films, resulted in the reduction of bandgap down to ~2.40 eV.
Collectively, these results confirm the presence of non-stoichiometric 2D WO3-x and the reduction of bandgap as a function of x.
This value correlates well with the previously published data for non-stoichiometric WO3-x.
Online since: November 2012
Authors: Y. M. D. Adedeji, A. A. Taiwo
Goals of a sustainable building should include: resource and energy efficiency [9]; carbon dioxide (CO2) and greenhouse gas emissions reduction[9]; pollution prevention; mitigation of noise; improved indoor air quality; harmonisation with the environment; low construction cost, modest maintenance, but return completely to the earth when abandoned [10].
Others include materials efficiency, elimination or reduction of generated waste; low toxicity; water conservation; affordability.
Research Methodology The data presented in this report were obtained from research conducted by the authors on building materials in Nigeria.
A well-structured questionnaire, designed to investigate variables on preference for the use of standardized wood-based materials for finishes over the conventional type was used to collect primary data.
Table 1: Distribution of Questionnaire within the Study Area S/No Geopolitical zone Town No of Questionnaire No of Responses 1 South West Akure 50 28 2 North Abuja 50 32 3 South South Port Harcourt 50 40 4 South East Enugu 50 20 Total 200 120 Source: Field survey, 2007 Besides, additional data for the study were obtained through case studies and observations carried out in these selected cities.
Others include materials efficiency, elimination or reduction of generated waste; low toxicity; water conservation; affordability.
Research Methodology The data presented in this report were obtained from research conducted by the authors on building materials in Nigeria.
A well-structured questionnaire, designed to investigate variables on preference for the use of standardized wood-based materials for finishes over the conventional type was used to collect primary data.
Table 1: Distribution of Questionnaire within the Study Area S/No Geopolitical zone Town No of Questionnaire No of Responses 1 South West Akure 50 28 2 North Abuja 50 32 3 South South Port Harcourt 50 40 4 South East Enugu 50 20 Total 200 120 Source: Field survey, 2007 Besides, additional data for the study were obtained through case studies and observations carried out in these selected cities.
Online since: April 2004
Authors: Zhu Feng Yue, T. Li
In this case, the life curves are similar
to those obtained for tensile hold time tests, and similar conclusions could be drawn concerning the
influence of cyclic stress and lifetime reduction with stress level.
With this representation, FC results with hold time in tension and in compression could be reported on the same diagram with creep data.
It is shown that FC hold results are enclosed with creep results on a same slope, with only a small reduction of lifetime for creep-fatigue tests. 105 106 107 108 100 1000 600s Ten. 200s Ten. 260s Ten. 300s Ten. 1800s Ten.
The lifetime under TMFC-IP testing seems to be reduced comparing to the creep-fatigue data with equivalent hold time in tension (around 5 min).
Yue, Collection of the experiments data of nickel-base single crystal superalloy DD3, Northwestern Polytechnical University, Xian(2001) 2.
With this representation, FC results with hold time in tension and in compression could be reported on the same diagram with creep data.
It is shown that FC hold results are enclosed with creep results on a same slope, with only a small reduction of lifetime for creep-fatigue tests. 105 106 107 108 100 1000 600s Ten. 200s Ten. 260s Ten. 300s Ten. 1800s Ten.
The lifetime under TMFC-IP testing seems to be reduced comparing to the creep-fatigue data with equivalent hold time in tension (around 5 min).
Yue, Collection of the experiments data of nickel-base single crystal superalloy DD3, Northwestern Polytechnical University, Xian(2001) 2.