Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: February 2009
Authors: Di Zhu, Wei Wang, Shao Fu Huang, Yong Liu, Yong Bin Zeng
The
current data is acquired by data acquisition card in real time.
It is necessary that the system makes corresponding response in time according to the monitored current data.
The precision lead screw's rotation is driven by stepping motor through a large reduction ratio gear reducer.
Control System The modular structure of the control system software based on Lab Windows CVI includes data acquisition subsystem, processing control subsystem, and human-computer interaction subsystem (fig. 5).
The control system can realize the following operations: reading DXF data, trajectory control, numerical calculation, front panel display, and file operation.
It is necessary that the system makes corresponding response in time according to the monitored current data.
The precision lead screw's rotation is driven by stepping motor through a large reduction ratio gear reducer.
Control System The modular structure of the control system software based on Lab Windows CVI includes data acquisition subsystem, processing control subsystem, and human-computer interaction subsystem (fig. 5).
The control system can realize the following operations: reading DXF data, trajectory control, numerical calculation, front panel display, and file operation.
Online since: May 2025
Authors: Sudip Simlandi, Nilkanta Barman, Subhadeep Halder
Accordingly, this study focuses on the effect of regeneration and cooling of the inlet air on performance of an open cycle gas turbine plant, which mainly includes improvement in its thermal efficiency and reduction in specific fuel consumption.
As an example, 12.89% increase in thermal efficiency is found at a regenerator effectiveness of 0.85 on addition of spray cooler before compression of inlet air at an ambient temperature of 328K, and subsequent reduction in specific fuel consumption is found as 2.85% at pressure ratio of 10.
They emphasised in reduction of the intake air temperature in order to enhance the overall efficiency of any plant.
In case of turbine and compressor, necessary assumptions are presented here as: · Steady state flow · Insulated · Same potential head at inlet and outlet datum Accordingly, under a steady state condition, the energy balance of the air flows from state-1 to state-2 of the compressor is presented here as: (1) Fig. 3 Schematic T-s diagram for the regenerative Brayton cycle Hence, related specific energy balance (energy balance per unit mass) is given as: (2) The considered assumptions lead Eq. (2) to a relation as: (3) Now, size of inlet and outlet pipes of the compressor is to be designed such a way to maintain, which presents the specific energy balance as (4) In case of compressor, work is done on the system.
In brief, in a high temperature environmental condition, adding of a spray cooler before compression is very essential in order to reduce specific fuel consumption that leads reduction in emission of the pollutants.
As an example, 12.89% increase in thermal efficiency is found at a regenerator effectiveness of 0.85 on addition of spray cooler before compression of inlet air at an ambient temperature of 328K, and subsequent reduction in specific fuel consumption is found as 2.85% at pressure ratio of 10.
They emphasised in reduction of the intake air temperature in order to enhance the overall efficiency of any plant.
In case of turbine and compressor, necessary assumptions are presented here as: · Steady state flow · Insulated · Same potential head at inlet and outlet datum Accordingly, under a steady state condition, the energy balance of the air flows from state-1 to state-2 of the compressor is presented here as: (1) Fig. 3 Schematic T-s diagram for the regenerative Brayton cycle Hence, related specific energy balance (energy balance per unit mass) is given as: (2) The considered assumptions lead Eq. (2) to a relation as: (3) Now, size of inlet and outlet pipes of the compressor is to be designed such a way to maintain, which presents the specific energy balance as (4) In case of compressor, work is done on the system.
In brief, in a high temperature environmental condition, adding of a spray cooler before compression is very essential in order to reduce specific fuel consumption that leads reduction in emission of the pollutants.
Online since: August 2013
Authors: Guo Hong Lv, Guang Shen Zhou, Xiao Ying Wang
Materials and methods
Collection of data.
Climatic data were obtained from the Chinese meteorological data sharing service system (http://cdc.cma.gov.cn).
Annual climatic data were chosen for meteorological stations corresponding to the latitude and longitude of the research sites.
If the research sites had no corresponding meteorological stations, climatic data were taken from adjacent stations that were closely located.
Data treatment.
Climatic data were obtained from the Chinese meteorological data sharing service system (http://cdc.cma.gov.cn).
Annual climatic data were chosen for meteorological stations corresponding to the latitude and longitude of the research sites.
If the research sites had no corresponding meteorological stations, climatic data were taken from adjacent stations that were closely located.
Data treatment.
Online since: February 2014
Authors: Qiu Ju Wang, Da Shen Xue
For a sample data, Observed variables, samples data matrix as follows:
(1)
Principal component analysis is based on observed variables become new variables integrated (integrated variable)
(2)
The Analysis of Coastal Areas of China's Consumer Price
China's coastal area residents’ consumption level factors include: food, alcohol and tobacco and supplies, ect.
Coastal towns of consumer expenditure data are shown in Table 1 and Table 2.
The second step: Using SPPS in dimension reduction/factor analysis of the standardized data on principal component analysis, correlation matrix analysis results, as shown in Table 3.
The initial factor loading matrix two data input to the data editor window, and then use "Transform/Compute Variable", in the Compute Variable dialog box, enter "a1 = X1/SQR (5.877)" get the first feature vector with the same second feature vectors obtained and has been feature vector[5], as shown in Table 6.
[3] Fang Luo, Hongyun Liu, Huang Kun, SPSS statistics and data analysis; Tsinghua University Press, Beijing ,2009
Coastal towns of consumer expenditure data are shown in Table 1 and Table 2.
The second step: Using SPPS in dimension reduction/factor analysis of the standardized data on principal component analysis, correlation matrix analysis results, as shown in Table 3.
The initial factor loading matrix two data input to the data editor window, and then use "Transform/Compute Variable", in the Compute Variable dialog box, enter "a1 = X1/SQR (5.877)" get the first feature vector with the same second feature vectors obtained and has been feature vector[5], as shown in Table 6.
[3] Fang Luo, Hongyun Liu, Huang Kun, SPSS statistics and data analysis; Tsinghua University Press, Beijing ,2009
Online since: February 2011
Authors: Yong Chun Guo, Jian Ping Li, Jin Shan Li, Ping Wang
The rare earth elements don’t form independent phases in ceramic coating but affect the relative proportion of constitution phases, resulting in the reduction of intermixed magnesium phase and the increase of the MgO and MgSiO3 phases.
Therefore the growth process of ceramic coating accords with linear regularity with data fitting software CurveExpert1.3 in the anodic oxidation stage.
In the micro-arc oxidation stage, data fitting software CurveExpert1.3 shows that the growth process of ceramic coating changes to parabolic regularity.
The growth process of ceramic coating still accords with parabolic regularity with data fitting software CurveExpert1.3 in the arc light stage.
The rare earth elements don’t form independent phases in ceramic coating but affect the relative proportion of constitution phases, resulting in the reduction of intermixed magnesium phase and the increase of the MgO and MgSiO3 phases.
Therefore the growth process of ceramic coating accords with linear regularity with data fitting software CurveExpert1.3 in the anodic oxidation stage.
In the micro-arc oxidation stage, data fitting software CurveExpert1.3 shows that the growth process of ceramic coating changes to parabolic regularity.
The growth process of ceramic coating still accords with parabolic regularity with data fitting software CurveExpert1.3 in the arc light stage.
The rare earth elements don’t form independent phases in ceramic coating but affect the relative proportion of constitution phases, resulting in the reduction of intermixed magnesium phase and the increase of the MgO and MgSiO3 phases.
Online since: August 2007
Authors: Young Gun Ko, Dong Hyuk Shin, Kyung Tae Park, Kion Kwon, Duck Young Hwang, Chong Soo Lee
An analysis of
the mechanical data in light of the standard deformation mechanisms revealed that deformation of
the sample after 4 passes was governed by dislocation climb while grain boundary sliding attributed
to LTS of the sample after 8 passes.
For 5154 Al alloy, ECAP was preformed up to 4 passes with route Bc and subsequent cold rolling was carried out up to a total reduction of 70 % with 0.2 mm reduction per rolling pass.
The mechanical data of the alloy after 4 passes were fitted into a straight line with a slope of ~ 0.2, i.e.
Contrarily, the mechanical data of the alloy after 8 passes exhibited the sigmoidal behavior manifested by the presence of the three distinct regions. m was ∼0.1 at low (Region I, ε& < 3×10 -4 s-1) and high strain rates (Region III, 2×10-3 s-1 < &ε ).
These include (a) the mechanical data implied that the deformation of the ECAP sample was governed by dislocation viscous glide while that of the ECAP+CR (70 %) sample was dominated by GBS and (b) the deformation in the ECAP sample was localized at the initial deformation stage and it became more severely localized as deformation proceeded, but GBS Fig. 5 TEM micrographs of (a) the ECAP sample and (b) the ECAP+CR (70%) sample of 5154 Al occurred predominantly from the initial deformation stage of the ECAP+CR (70 %) sample, resulting relatively uniform deformation throughout the sample. 10 -5 10 -4 10 -3 10 -2 10 -1 10 0 0 200 400 600 800 1000 1200 elongation to failure , % initial strain rate , s -1 modified 5154 Al T = 723K ECAP ECAP+CR 10 -6 10 -5 10 -4 10 -3 10 -2 10 -1 10 0 10 1 10 100 2 200 0.33 1 0.45 1 stress , MPa strain rate , s -1 Al-3.2Mg-0.13Sc T = 723 K ECAP
For 5154 Al alloy, ECAP was preformed up to 4 passes with route Bc and subsequent cold rolling was carried out up to a total reduction of 70 % with 0.2 mm reduction per rolling pass.
The mechanical data of the alloy after 4 passes were fitted into a straight line with a slope of ~ 0.2, i.e.
Contrarily, the mechanical data of the alloy after 8 passes exhibited the sigmoidal behavior manifested by the presence of the three distinct regions. m was ∼0.1 at low (Region I, ε& < 3×10 -4 s-1) and high strain rates (Region III, 2×10-3 s-1 < &ε ).
These include (a) the mechanical data implied that the deformation of the ECAP sample was governed by dislocation viscous glide while that of the ECAP+CR (70 %) sample was dominated by GBS and (b) the deformation in the ECAP sample was localized at the initial deformation stage and it became more severely localized as deformation proceeded, but GBS Fig. 5 TEM micrographs of (a) the ECAP sample and (b) the ECAP+CR (70%) sample of 5154 Al occurred predominantly from the initial deformation stage of the ECAP+CR (70 %) sample, resulting relatively uniform deformation throughout the sample. 10 -5 10 -4 10 -3 10 -2 10 -1 10 0 0 200 400 600 800 1000 1200 elongation to failure , % initial strain rate , s -1 modified 5154 Al T = 723K ECAP ECAP+CR 10 -6 10 -5 10 -4 10 -3 10 -2 10 -1 10 0 10 1 10 100 2 200 0.33 1 0.45 1 stress , MPa strain rate , s -1 Al-3.2Mg-0.13Sc T = 723 K ECAP
Online since: September 2013
Authors: Nida Chaimoon, Chareonporn Lertsatitthanakorn, Krit Chaimoon
Data recorded included room temperature, inside and outside surfaces temperatures of all walls, and solar intensity.
They include a reduction in construction time and cost.
Data were recorded using a data logger and sampled every 5 min during 24 h.
to the temperature data recorded during the day, the corresponding conduction heat transfer rate was the calculated and shown in Fig. 7.
Therefore, the mean energy consumption reduction corresponding to a 1°C increase of the set-point (from 22 to28°C) is about 6.14%.
They include a reduction in construction time and cost.
Data were recorded using a data logger and sampled every 5 min during 24 h.
to the temperature data recorded during the day, the corresponding conduction heat transfer rate was the calculated and shown in Fig. 7.
Therefore, the mean energy consumption reduction corresponding to a 1°C increase of the set-point (from 22 to28°C) is about 6.14%.
Online since: December 2012
Authors: Xiao Lan Yang, Ji Feng Liu, Zeng Wen Xiao, Fang Min Xu
The upper machine is used to interact with the single-chip microcomputer, and the data can be saved and download.
Host computer is connected by the data cable.
VB6.0 software is used to write the data acquisition process and deal with the collection data, then the information which system needs can be gotten.
The debugging operation is divided into preset program numerical value, data acquisition, data sorting, and data analysis of four stages.
Analysis of measured data.
Host computer is connected by the data cable.
VB6.0 software is used to write the data acquisition process and deal with the collection data, then the information which system needs can be gotten.
The debugging operation is divided into preset program numerical value, data acquisition, data sorting, and data analysis of four stages.
Analysis of measured data.
Online since: June 2013
Authors: Wei Liu, Hong Zhao Liu
Three mean of observations
The three mean describes the data concentration characteristics.
It’s a robust statistical characteristic if outlier exists in the data
They used to describe data dispersibility
-Range and interquartile range The range is the difference between the maxima and minima of the sample data value.
There are 10 data of leakage data, show as figure 4, it cannot divided the normal signal or leakage signal by counting the time window bandwidth and collecting the jumping times within each time window.
It’s a robust statistical characteristic if outlier exists in the data
They used to describe data dispersibility
-Range and interquartile range The range is the difference between the maxima and minima of the sample data value.
There are 10 data of leakage data, show as figure 4, it cannot divided the normal signal or leakage signal by counting the time window bandwidth and collecting the jumping times within each time window.
Online since: September 2013
Authors: Kiatfa Tangchaichit, Jarupol Suriyawanakul
Regularly LES is used to capture instantaneous data and send them to the finite element method (FEM) for a vibration calculation of a head stack assembly (HSA).
The researchers use convergence information of steady k-e for initial data to reduce the calculation time [1,2,3].
Flow-induced vibration reduction in HDD by using a spoiler.
Flow-Induced Vibration Reduction for Hard Disk Drive with a Window Spoiler.
The researchers use convergence information of steady k-e for initial data to reduce the calculation time [1,2,3].
Flow-induced vibration reduction in HDD by using a spoiler.
Flow-Induced Vibration Reduction for Hard Disk Drive with a Window Spoiler.