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Online since: May 2012
Authors: Qing He Gao, Yi Can Wang, Yu Mei Jiang
This was also one of the key factors that caused the reduction of reservoir permeability.
Generally, the viscosity of produced liqiud had a trend of rising and the average viscosity was about 2.7cp owing to the reduction of polymer viscosity by reservoir pore.
As a result of ASP flooding taking effect and the dissolution-sedimentary balance in this system, total production and water content had a certain reduction.
The characteristics in macroscopic are oil-wells scaling and reduction of fluid yield.
This method has many advantages: it is easy to get necessary data and has high maneuverability and accuracy.
Generally, the viscosity of produced liqiud had a trend of rising and the average viscosity was about 2.7cp owing to the reduction of polymer viscosity by reservoir pore.
As a result of ASP flooding taking effect and the dissolution-sedimentary balance in this system, total production and water content had a certain reduction.
The characteristics in macroscopic are oil-wells scaling and reduction of fluid yield.
This method has many advantages: it is easy to get necessary data and has high maneuverability and accuracy.
Online since: July 2017
Authors: Vladimir N. Sanin, V.I. Yukhvid, Vladimir A. Gorshkov, M.I. Alymov, Dmitrii Andreev
The chemical transformation includes the metal reduction from the oxides, the following mutual dissolution of the metal products and formation of coarse drops distributed in the oxide (slag) medium.
There are also some problems connected with close specific weights of the heat-resistant material and slag phase as well as incomplete reduction of TiO2 with aluminum.
The investigation has proved that Hf actively participates in reduction of Nb2O5, so its introduction to the alloys becomes rather difficult and besides it results in Al excess in the composite material.
The data shown in Table 8 prove that iron from the coating penetrates into the whole height of the coating.
Pandey, In-situ synthesis of chromium carbide (Cr3C2) nanopowders by chemical-reduction route, Int.
There are also some problems connected with close specific weights of the heat-resistant material and slag phase as well as incomplete reduction of TiO2 with aluminum.
The investigation has proved that Hf actively participates in reduction of Nb2O5, so its introduction to the alloys becomes rather difficult and besides it results in Al excess in the composite material.
The data shown in Table 8 prove that iron from the coating penetrates into the whole height of the coating.
Pandey, In-situ synthesis of chromium carbide (Cr3C2) nanopowders by chemical-reduction route, Int.
Online since: September 2014
Authors: Rosinei B. Ribeiro, Fernando Vernilli, Gilbert Silva, Rafaela Veloso de Oliveira, Messias B. Silva
INTRODUCTION
Experiment project is an applied methodology in several areas, aiming at the improvement of the productivity and the reduction of the variability, seeking to generate information to guide the decisions during the research and the development of new materials [1,2].
Taguchi’s method is defined by two important parameters: (a) reduction in the variability, on the other hand, the use of the Quality Engineering in the product or process representing continuous improvement and aiming at smaller loss for the society; (b) application of strategic planning in an appropriate way, with the aim of reducing variation, in a general way.
The data were analyzed using the STATISTICA program, version 6.0 for Windows.
Taguchi’s method is defined by two important parameters: (a) reduction in the variability, on the other hand, the use of the Quality Engineering in the product or process representing continuous improvement and aiming at smaller loss for the society; (b) application of strategic planning in an appropriate way, with the aim of reducing variation, in a general way.
The data were analyzed using the STATISTICA program, version 6.0 for Windows.
Energy Efficiency and System Control of Street Lighting Using Wireless Sensors Network and Actuators
Online since: April 2014
Authors: Leandro Tiago Manera, Felipe Lorenzo Della Lucia, Felipe Cassaro Frazatto
Data from the IEA (International Energy Agency) estimates that it is possible to save 133-212 TWh per year if new technologies on lighting were implemented [1].
It is also responsible to collect the data from the radiant sensor and send it to the operator to inform about environmental conditions.
The operator can check the status, set the dimming levels and read the sensors data of each node of the network.
In order to estimate the network range, experiments were conducted to determine how far it was possible to control the lamps and receive sensor data with the current communications modules.
When using 2 more nodes, each acting as a router, it was possible to receive sensor data and control the lamps 395 m apart, each node contributing to increase the network range at about 130 m.
It is also responsible to collect the data from the radiant sensor and send it to the operator to inform about environmental conditions.
The operator can check the status, set the dimming levels and read the sensors data of each node of the network.
In order to estimate the network range, experiments were conducted to determine how far it was possible to control the lamps and receive sensor data with the current communications modules.
When using 2 more nodes, each acting as a router, it was possible to receive sensor data and control the lamps 395 m apart, each node contributing to increase the network range at about 130 m.
Online since: March 2006
Authors: Sun Kyu Kim, Young Nam Kim, Kwang Hee Im, In Young Yang, Je Woong Park, David K. Hsu
We
have compared the test results with model data.
The first assumption used is that the interface and beam spreading losses are negligible, that is, all a signal reduction factor terms equal one.
The parallel port of the PC is used to output the motor control signal and a high-speed data acquisition board is used to digitize the ultrasonic signals.
A graphics based user interface software was developed for scan control and data analysis.
Those data are going up and down regularly.
The first assumption used is that the interface and beam spreading losses are negligible, that is, all a signal reduction factor terms equal one.
The parallel port of the PC is used to output the motor control signal and a high-speed data acquisition board is used to digitize the ultrasonic signals.
A graphics based user interface software was developed for scan control and data analysis.
Those data are going up and down regularly.
Online since: August 2014
Authors: Hao Liu, Xin Ming Tang, Wei Cao, Zhi Ying Xie, Jing Han Lei, Ming Li, Yang Gao
Spatio-temporal Variations of Aerosol Optical Depth
over Areas Around Beijing in Recent 14 Years
Liu Hao1, Tang Xinming2, Cao Wei3,a, Xie Zhiying4,
Lei Jinghan5, Li Ming6 and Gao Yang7
1Academy of Disaster Reduction and Emergency Management,
Beijing Normal University, Beijing 100875 China
2Satellite Surveying and Mapping Application Center, National Administration of Surveying,
Mapping and Geo-information, Beijing 100830 China
3Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101 China
4Lanzhou Jiaotong University, Lanzhou 730070 China
5Faculty Of Education, Beijing Normal University, Beijing 100875 China
6National Geomatics Center of China, Beijing 100830 China
7Capital Normal University, Beijing 100048
alihaha1985@126.com(corresponding author)
Key Words: MODIS; Aerosol optical depth; Spatio-temporal variations; Areas around Beijing
Abstract.
Based on the monthly data of MODIS Level 3, the spatio-temporal variabilities of Aerosol Optical Depth (AOD) over areas around Beijing have been analyzed from March 2000 to December 2013.
As we know, aerosol properties are greatly affected by the specific weather process, so daily data is not suitable for us.
Therefore, we used MODIS Level 3, version C5.1, 550nm wavelength aerosol data set, with a resolution of 1°×1°, from March 2000 to December 2013, this data is monthly mean data set from EOS-Terra[5]. 3 Results and analysis 3.1 Temporal variations of AOD (1) Inter-annual variations In recent 14 years, from Fig.1 the annual mean AOD vary between 0.428 and 0.550, which reach its peak at 2006 with an AOD of 0.550, and reach its trough in 2004 with an AOD of 0.428.
A Critical Look at Deriving Monthly Aerosol Optical Depth From Satellite Data[J].
Based on the monthly data of MODIS Level 3, the spatio-temporal variabilities of Aerosol Optical Depth (AOD) over areas around Beijing have been analyzed from March 2000 to December 2013.
As we know, aerosol properties are greatly affected by the specific weather process, so daily data is not suitable for us.
Therefore, we used MODIS Level 3, version C5.1, 550nm wavelength aerosol data set, with a resolution of 1°×1°, from March 2000 to December 2013, this data is monthly mean data set from EOS-Terra[5]. 3 Results and analysis 3.1 Temporal variations of AOD (1) Inter-annual variations In recent 14 years, from Fig.1 the annual mean AOD vary between 0.428 and 0.550, which reach its peak at 2006 with an AOD of 0.550, and reach its trough in 2004 with an AOD of 0.428.
A Critical Look at Deriving Monthly Aerosol Optical Depth From Satellite Data[J].
Online since: October 2010
Authors: Hong Mei Chen, Zhi Yong Wu, Wei Jin
Evaluation Index System of Regional Technological Innovation Efficiency
Based on technological innovation theories, this paper uses existing researches for reference and
integrates them [1-3], combines with the author's research, and considers the data availability.
The main idea of the model is: firstly, it uses the dimension reduction of principal component analysis, respectively analyzes the input and output indicators by principal component analysis.
For the problem of the effectiveness that the data analyzed by principal component analysis carry out the evaluation of decision making unit efficiency, in the document [5], it has been proved, so it will not go further on this issue.
These selected samples in this paper are 31 provinces and cities in Chinese mainland, but because the data in Tibet are incomplete, so the final samples are 30 provinces and cities in Chinese mainland except Tibet.
From the above data, if the DEAs of provinces and cities are invalid, the overall levels of their comprehensive efficiency value are relatively low, especially in most western provinces, including Gansu, Qinghai, Ningxia and Xinjiang.
The main idea of the model is: firstly, it uses the dimension reduction of principal component analysis, respectively analyzes the input and output indicators by principal component analysis.
For the problem of the effectiveness that the data analyzed by principal component analysis carry out the evaluation of decision making unit efficiency, in the document [5], it has been proved, so it will not go further on this issue.
These selected samples in this paper are 31 provinces and cities in Chinese mainland, but because the data in Tibet are incomplete, so the final samples are 30 provinces and cities in Chinese mainland except Tibet.
From the above data, if the DEAs of provinces and cities are invalid, the overall levels of their comprehensive efficiency value are relatively low, especially in most western provinces, including Gansu, Qinghai, Ningxia and Xinjiang.
Online since: April 2022
Authors: Mohamed Annad, Abdelouahab Lefkir
These formulas were rarely tested using field data, where, until recently, there was very little data to validate them.
The data used is in situ data from an extensive database.
For this study, 1249 field data were selected. 2.
Therefore, these missed data have been discarded.
Data Ser., 2014, vol. 845
The data used is in situ data from an extensive database.
For this study, 1249 field data were selected. 2.
Therefore, these missed data have been discarded.
Data Ser., 2014, vol. 845
Online since: August 2019
Authors: Budhy Kurniawan, Agung Imaduddin, Dicky Rezky Munazat
These results are suitable with the reduction in the electronic bandwidth value.
Comparison of experimental data with theoretical models shows that the electrical behavior of the samples is well explained by a theory based on percolation models.
The equations which have been used to fit the resistivity data over the entire temperature range is given by Eq 2.
It can be seen from the excellent agreement between the experimental data (triangle), and the calculated (solid red lines) as seen in Fig. 2.
Using the percolation model, the temperature dependence resistivity data has been extended up to 400 K as indicated by solid red lines in figure 2.
Comparison of experimental data with theoretical models shows that the electrical behavior of the samples is well explained by a theory based on percolation models.
The equations which have been used to fit the resistivity data over the entire temperature range is given by Eq 2.
It can be seen from the excellent agreement between the experimental data (triangle), and the calculated (solid red lines) as seen in Fig. 2.
Using the percolation model, the temperature dependence resistivity data has been extended up to 400 K as indicated by solid red lines in figure 2.
Online since: August 2013
Authors: Ying Han Wu, Min Lang Lin, Chich Tsung Lin
The test data are helpful to analyze the behavior and modify the design criteria for the RC member retrofitted by the CFRP anchor technique.
Following the ACI440.2R [6], the general U-wraps or two-sided wraps do not enclose the entirely section, therefore, the effective strain level should be concerned as (5) Where, is the bond-reduction coefficient varying with the concrete strength, wrapping types and the CFRP stiffness [6]; is the ultimate strain of CFRP.
An elastic bond stress approaching ignored the resistance provided by the concrete cone is also determined with R squared 0.725 to the test datas, as shown in Fig. 6(b).
Therefore, the shear strength of the epoxy resin with an appropriate reduction factor [0.6τ] is proposed for the design bond strength.
Following the ACI440.2R [6], the general U-wraps or two-sided wraps do not enclose the entirely section, therefore, the effective strain level should be concerned as (5) Where, is the bond-reduction coefficient varying with the concrete strength, wrapping types and the CFRP stiffness [6]; is the ultimate strain of CFRP.
An elastic bond stress approaching ignored the resistance provided by the concrete cone is also determined with R squared 0.725 to the test datas, as shown in Fig. 6(b).
Therefore, the shear strength of the epoxy resin with an appropriate reduction factor [0.6τ] is proposed for the design bond strength.