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Online since: October 2013
Authors: Yu Zhang, Shi Wen Liu, Ding Fang Chen, Yi Bin He, Bing Kuan Yang
Lightweight is an important means of energy conservation and emissions reduction, In recent years, the development and popularization of computer, for lightweight design of mechanical product structure provides a convenient.
Box thickness design always uses the analogy method, carries on the comparison to similar products, with reference to the designer's experience and design manual data provides the empirical data, determine the thickness of box, rib plate and the bottom plate of the layout and structure parameters [5].
Fig.2 Stress change nephogram Fig .2 Displacement change nephogram The experimental data analysis The finite element analysis result data of changing the structure of the different size as below: Table 1 Only rid plate angle changes Table 2 Only rid plate thickness changes α max stress ( N/m2) max displacement (mm) 10° 108380488 6.416e-002 15° 114262112 5.231e-002 20° 118356848 4.438e-002 a1(mm) max stress (N/m2) max displacement (mm) 16 121928040 5.270e-002 20 118356848 4.438e-002 24 88910760 3.811e-002 Table 3 Only box thickness changes Table 4 Rid plate angle and box thickness all change a2(mm) max stress ( N/m2) max displacement (mm) 5 110677928 6.816e-002 8 108380488 6.416e-002 α a2(mm) max stress ( N/m2) max displacement (mm) 15° 5 133223248 5.367e-002 20° 8 118356848 4.438e-002 Table 5 Rid plate angle and thickness all change Table 6 Only bottom plate changes α a1(mm) max stress ( N/m2) max displacement (mm) 10° 10 171076544
Through research on gear reducer box structure finite element, analyze the data obtained from finite element analysis and calculation comparison, it can be concluded that: (1)The thickness of the bottom plate does not affect the stress and deformation of box structure; (2) Change the angle and thickness of the rid plates (that is, the overall size) at the same time, The change range of the stress and deformation of the box structure is the largest, other structural changes relative to change in size is not so big, so considering the reducer box practical situation, if the size satisfy the requirement of stress and deformation, choose the structure of the small size; (3)When box thickness in using selection is smaller than the traditional, to reduce the deformation increase caused by the reducer box thickness decrease ,it can be solved by use larger rid plate angle
Welded Structure CAD of Heavy Reduction [4] Cylinder Gear Box [J].Journal Of Xi’an JiaoTong University.1994.7, 28(4)P103-107
Box thickness design always uses the analogy method, carries on the comparison to similar products, with reference to the designer's experience and design manual data provides the empirical data, determine the thickness of box, rib plate and the bottom plate of the layout and structure parameters [5].
Fig.2 Stress change nephogram Fig .2 Displacement change nephogram The experimental data analysis The finite element analysis result data of changing the structure of the different size as below: Table 1 Only rid plate angle changes Table 2 Only rid plate thickness changes α max stress ( N/m2) max displacement (mm) 10° 108380488 6.416e-002 15° 114262112 5.231e-002 20° 118356848 4.438e-002 a1(mm) max stress (N/m2) max displacement (mm) 16 121928040 5.270e-002 20 118356848 4.438e-002 24 88910760 3.811e-002 Table 3 Only box thickness changes Table 4 Rid plate angle and box thickness all change a2(mm) max stress ( N/m2) max displacement (mm) 5 110677928 6.816e-002 8 108380488 6.416e-002 α a2(mm) max stress ( N/m2) max displacement (mm) 15° 5 133223248 5.367e-002 20° 8 118356848 4.438e-002 Table 5 Rid plate angle and thickness all change Table 6 Only bottom plate changes α a1(mm) max stress ( N/m2) max displacement (mm) 10° 10 171076544
Through research on gear reducer box structure finite element, analyze the data obtained from finite element analysis and calculation comparison, it can be concluded that: (1)The thickness of the bottom plate does not affect the stress and deformation of box structure; (2) Change the angle and thickness of the rid plates (that is, the overall size) at the same time, The change range of the stress and deformation of the box structure is the largest, other structural changes relative to change in size is not so big, so considering the reducer box practical situation, if the size satisfy the requirement of stress and deformation, choose the structure of the small size; (3)When box thickness in using selection is smaller than the traditional, to reduce the deformation increase caused by the reducer box thickness decrease ,it can be solved by use larger rid plate angle
Welded Structure CAD of Heavy Reduction [4] Cylinder Gear Box [J].Journal Of Xi’an JiaoTong University.1994.7, 28(4)P103-107
Online since: September 2013
Authors: De Sen Kong, Yan Qing Men
Staged construction response was simulated according to the practical excavation process, and strength reduction theory was used to analyze the basal heave stability problem.
Then two sixth-degrees of polynomial curves are obtained after fitting formula using the data from Table 2.
Finally, basal upheaval damage will be taken place if soil strength reaches the ultimate state because of plastic parameter reduction
(3) The plastic zone increases with the reduction of plastic parameters.
Both the calculated safety factor and plastic zone will be larger and larger with the reduction of plastic parameters.
Then two sixth-degrees of polynomial curves are obtained after fitting formula using the data from Table 2.
Finally, basal upheaval damage will be taken place if soil strength reaches the ultimate state because of plastic parameter reduction
(3) The plastic zone increases with the reduction of plastic parameters.
Both the calculated safety factor and plastic zone will be larger and larger with the reduction of plastic parameters.
Online since: September 2012
Authors: Ruben Bartali, Nadhira Laidani, Elisa Morganti, Leandro Lorenzelli, Marina Scarpa, Cristian Collini, Victor Micheli, Rajesh Pandiyan, Gloria Gottardi, Glauco Gambetti, Aman Gambetti, Ioana Luciu, G. Coser
But when we treated for more than 30seconds we didn’t observe a significant reduction of contact angle.
In opposite to the PDMS, the treatment done at 0.1 mbar showed a reduction of contact angle (blue data in the figure 2).
We observed that for PDMS when the pressure increased from 0.1mbar to 0.4mbar there was a reduction of the surface contact angle.
The reduction of pressure increase the mean free path of charged plasma species.
The ion bombardment change the surface morphology which could be a nanotexturing of PET surface and then the reduction of contact angle [12].
In opposite to the PDMS, the treatment done at 0.1 mbar showed a reduction of contact angle (blue data in the figure 2).
We observed that for PDMS when the pressure increased from 0.1mbar to 0.4mbar there was a reduction of the surface contact angle.
The reduction of pressure increase the mean free path of charged plasma species.
The ion bombardment change the surface morphology which could be a nanotexturing of PET surface and then the reduction of contact angle [12].
Online since: June 2019
Authors: Traian Mazilu, Dorina Fologea
Noise reduction is the focus of several studies aiming at noise mitigation by technical approaches involving roughness reduction of wheel and rail rolling surfaces, optimization of wheel and rail shapes, modification of their structure and the use of different local shielding methods [7].
Past explorations have shown a reduction in noise of 6 dB by using tuned frequency dampers [9].
The NI cDAQTM-9174 chassis was used for the data acquisition.
By using the rail acceleration and impact force as input data, the rail’s receptance was calculated using the Fourier transform.
An assessment of the effectiveness of noise reduction systems on Dublin's light rail system.
Past explorations have shown a reduction in noise of 6 dB by using tuned frequency dampers [9].
The NI cDAQTM-9174 chassis was used for the data acquisition.
By using the rail acceleration and impact force as input data, the rail’s receptance was calculated using the Fourier transform.
An assessment of the effectiveness of noise reduction systems on Dublin's light rail system.
Online since: July 2011
Authors: Dong Dong Liu
Introduction
The optimization problem of load distribution in the finishing-mill rolling process is how to get a serious of data about the slab thickness hi; and the data will make the whole system state most optimal.
In general, the rolling schedule is a chart full of experiential data which people get from the load distribution of actual production[1].
The data relying on this method is reasonable, but not optimal.
Simulation We combined 470 rolling data to establish and 16 data to check up the predict thickness model.
So once checking data outputs, the model usually educes unreasonable error.
In general, the rolling schedule is a chart full of experiential data which people get from the load distribution of actual production[1].
The data relying on this method is reasonable, but not optimal.
Simulation We combined 470 rolling data to establish and 16 data to check up the predict thickness model.
So once checking data outputs, the model usually educes unreasonable error.
Online since: August 2015
Authors: Abd Al Razak Tareq Rahem, Ihab Ahmed Najm, Mahamod Ismail
Fig 1 Distribution of energy consumption of data centers [7]
2.
Topology of data centers At present, the number of servers in data centers exceeds 100,000 [8], causes challenges in the design of interconnected network architecture.
Fig 2 Architecture of a three-tier high-speed data center [9] Servers are the main components of data centers that are carry out tasks.
Fig 4 illustrates the most effective settings on the data center.
parameters amount Data center Architecture: three-tier high-speed Power Mgmt.
Topology of data centers At present, the number of servers in data centers exceeds 100,000 [8], causes challenges in the design of interconnected network architecture.
Fig 2 Architecture of a three-tier high-speed data center [9] Servers are the main components of data centers that are carry out tasks.
Fig 4 illustrates the most effective settings on the data center.
parameters amount Data center Architecture: three-tier high-speed Power Mgmt.
Online since: December 2012
Authors: Yuan Xin Chen, Gui Lin Xu, Rui Ma, Bin Luo
Energy consuming condition of thermal power unit is reflected by its historical operation data, but the amount of data and the number of energy consumption indices are large.
This can simplify the data, reveal the relationship among various variables, and extract the characteristics of the data[3].
Standardize original data.
The function of PCA is dimension reduction and feature extraction.
Structure the principal components after standardizing the data.
This can simplify the data, reveal the relationship among various variables, and extract the characteristics of the data[3].
Standardize original data.
The function of PCA is dimension reduction and feature extraction.
Structure the principal components after standardizing the data.
Online since: August 2021
Authors: Elisabete Silva, Idalina Domingos, José Ferreira, Isabel Brás, Luiza Silva
Data for concrete production were obtained specifically for this study in a Portuguese industrial facility and are registered in Table 1.
As the data for the background processes and for internal transport and electricity used in the industrial facility was not available, the analysis was carried out with data from Ecoinvent database [12].
If the scope, assumptions, data quality, scenarios or LCIA method chosen varies from one study to the other, the LCA results will be different.
In this phase of the material characterization, one can state that the concrete with fly ash incorporated may be classified as an eco-material (eco-concrete) considering that the environmental issues that are minimized are waste reduction, reduce of landfill problems and resource saving by the utilization of recycled materials.
Jungbluth, various authors: Life Cycle Inventories of Building Products, Final report Ecoinvent data V2.0 Nº7, EMPA Dubendorf, Swiss Centre for Life Cycle Inventories, Dubendorf, CH, 2007
As the data for the background processes and for internal transport and electricity used in the industrial facility was not available, the analysis was carried out with data from Ecoinvent database [12].
If the scope, assumptions, data quality, scenarios or LCIA method chosen varies from one study to the other, the LCA results will be different.
In this phase of the material characterization, one can state that the concrete with fly ash incorporated may be classified as an eco-material (eco-concrete) considering that the environmental issues that are minimized are waste reduction, reduce of landfill problems and resource saving by the utilization of recycled materials.
Jungbluth, various authors: Life Cycle Inventories of Building Products, Final report Ecoinvent data V2.0 Nº7, EMPA Dubendorf, Swiss Centre for Life Cycle Inventories, Dubendorf, CH, 2007
Online since: October 2011
Authors: Mahdi Aliyari Shoorehdeli, Mostafa Noruzi Nashalji, Seyed Mohammad Razeghi, Mohammad Teshnehlab
Data driven techniques have been applied in many chemical processes.
This paper is used PCA and FDA to produce a lower-dimensionality, PCA is a dimensionality reduction technique which transforms correlated original multivariate data to a set of uncorrelated data [14].
Sampling time was used to collect the simulated data for the training and testing data is 3 minutes.
Let the original data set, where each row is a single sample of data set and each column is an observation.
Reduction order A reduced set of a smaller number ‘a’ (adata are good for fault detecting.
This paper is used PCA and FDA to produce a lower-dimensionality, PCA is a dimensionality reduction technique which transforms correlated original multivariate data to a set of uncorrelated data [14].
Sampling time was used to collect the simulated data for the training and testing data is 3 minutes.
Let the original data set, where each row is a single sample of data set and each column is an observation.
Reduction order A reduced set of a smaller number ‘a’ (a
Online since: December 2018
Authors: Willy Hermann Juimo Tchamdjou, Njarazo Rakotondrabezaharinoro, Moutari Ado
Table 2 presents details of testing conditions and particle size distribution data obtained by laser diffraction such as d10, d20, d30, d50, d80, d90, the surface mean diameter D[3,2] and the volume mean diameter D[4,3].
Summary data of physical properties of raw powders and sands.
Its main mineralogical, chemical and physical features are summarized in Table 3 (data made available by the producer company) [15].
These results are very interesting since the blended mortars presented a significant reduction in the Portland cement consumption (up to 35%, by mass) and, consequently, a reduction in the greenhouse gas emissions.
To study the influence of ratio, k-factor, activity index and strength gain of raw powder on mechanical properties, data analysis was conducted using software SPSS.
Summary data of physical properties of raw powders and sands.
Its main mineralogical, chemical and physical features are summarized in Table 3 (data made available by the producer company) [15].
These results are very interesting since the blended mortars presented a significant reduction in the Portland cement consumption (up to 35%, by mass) and, consequently, a reduction in the greenhouse gas emissions.
To study the influence of ratio, k-factor, activity index and strength gain of raw powder on mechanical properties, data analysis was conducted using software SPSS.