Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: August 2016
Authors: Shi Dian Ma, Hao Bin Jiang, Ao Xue Li
Table 1 Simulation data of air drag resistance and lifting force of each model.
Results and Discussion The measurement data of position 1-5 are shown in Fig. 10.
(a) Position 1 (b) Position 2 (c) Position 3 (d) Position 4 (e) Position 5 Fig. 10 Data of wind speed and rotational speed.
Aerodynamic drag reduction for low carbon vehicles.
Results and Discussion The measurement data of position 1-5 are shown in Fig. 10.
(a) Position 1 (b) Position 2 (c) Position 3 (d) Position 4 (e) Position 5 Fig. 10 Data of wind speed and rotational speed.
Aerodynamic drag reduction for low carbon vehicles.
Online since: July 2006
Authors: David J. Lloyd, J. David Embury, Warren J. Poole, Xi Wang
This stress level is approaching the theoretical strength which can be estimated as the
pptµ /20, i.e. 2.5-3 GPa using an estimate for the shear modulus of the Mg2Si (the closest precipitate
for which data is available) phase [8].
It is, therefore, not surprising that at larger strains, fracture of the precipitates can readily be observed as shown in Fig. 3b for a cold rolling reduction of 20%.
Acknowledgments The authors are grateful to Alcan and NSERC Canada for reach support and would also sincerely thank Johnson Go for provision of the softening data shown in Fig. 6a.
Hearmon: Landolt-Bornstein: Numerical Data and Functional Relationships in Science And Technology, New Series, K.
It is, therefore, not surprising that at larger strains, fracture of the precipitates can readily be observed as shown in Fig. 3b for a cold rolling reduction of 20%.
Acknowledgments The authors are grateful to Alcan and NSERC Canada for reach support and would also sincerely thank Johnson Go for provision of the softening data shown in Fig. 6a.
Hearmon: Landolt-Bornstein: Numerical Data and Functional Relationships in Science And Technology, New Series, K.
Online since: November 2012
Authors: Zita Csendes, Janos T. Kiss, Bence Kutus, Pal Sipos, Istvan Pálinkó
It is a reduction and the reduced form of riboflavin reacts with oxygen forming a peroxide derivative.
From literature data it is known that the imidazole nitrogen is always a coordinating site [6, 7], just as the sulfur atom(s) in the thiolate or thiol group or in the disulfide bridge [8].
Data reveal that there were catalysts approaching the activity of the Cu-Zn SOD enzyme.
The coordinating sites could be determined with the combination of literature data, FT-IR spectroscopy and chemical intuition.
From literature data it is known that the imidazole nitrogen is always a coordinating site [6, 7], just as the sulfur atom(s) in the thiolate or thiol group or in the disulfide bridge [8].
Data reveal that there were catalysts approaching the activity of the Cu-Zn SOD enzyme.
The coordinating sites could be determined with the combination of literature data, FT-IR spectroscopy and chemical intuition.
Online since: September 2013
Authors: Chun Tao Lin, Qing Hua Xie, Xiang Wei Zhang, Wen Ge Lv, Si Yuan Cheng, Yong Jia Yang
System dynamics data collection:
(1) Chinese household income and expenditure survey from National Bureau of Statistics website;
(2) Population and housing census (There are number of households, average household volume) from National Bureau of Statistics website;
(3) China's production of electronic quantity from National Bureau of Statistics website;
(4) China's electronic products import and export volume of trade from China Foreign Economic and Trade Yearbook;
(5) Prediction of China's population according to Chinese Population Data Estimates
(6) GDP regression line: 2013 to 2030 speculation data in GDP growth; (7) The useful life of appliances survey from the report commissioned by Ministry of Finance and Development of Ministry of Information Industry.
Then we could use heuristic algorithm to solve the problem of the optimal recycling plant expansion or reduction of disposal capacity and disposal capacity point in time.
(6) GDP regression line: 2013 to 2030 speculation data in GDP growth; (7) The useful life of appliances survey from the report commissioned by Ministry of Finance and Development of Ministry of Information Industry.
Then we could use heuristic algorithm to solve the problem of the optimal recycling plant expansion or reduction of disposal capacity and disposal capacity point in time.
Online since: October 2014
Authors: Min Li Ge
The emergency plan clearly defined the freeway incident classification (natural disasters, highway traffic accidents, public health events and social security incident) and grading (level Ⅰ- extraordinarily serious, level Ⅱ-serious, level Ⅲ- major, level Ⅳ-ordinary), and also provided the following information: alert information to be captured during emergency operation, alert level, emergency response, command and coordination work system, information exchange and release system, resource allocation system and emergency response terminates program , and so on.
4.2 Emergency plan generation process
Freeway emergency management requires sufficient real-time data and management experience.
System environment Development tool Microsoft Visual Studio Data base Oracle 10g WebGIS software ArcGIS Server 9.3.1 Fig. 3.
[2] Barnes C F, Fritz H,YooJ.Hurricane Disaster Assessments with Image Driven, Data Mining in High Resolution Satellite Imagery.
City and Disaster Reduction. 2006(2):17-19
System environment Development tool Microsoft Visual Studio Data base Oracle 10g WebGIS software ArcGIS Server 9.3.1 Fig. 3.
[2] Barnes C F, Fritz H,YooJ.Hurricane Disaster Assessments with Image Driven, Data Mining in High Resolution Satellite Imagery.
City and Disaster Reduction. 2006(2):17-19
Online since: August 2014
Authors: Zhi Fang Niu, Xing Hua Wang
The subdivision method compared with conventional methods, the characteristics are as follows:
1, can eliminate the grating velocity of non-uniform grating signal amplitude changes caused by the segmentation error;
2, as long as through the software to make a change a bit, can conveniently realize the fine points of different;
3, hardware circuit is simple, need not specially designed complex subdivision circuit, it just a piece of data acquisition circuit;
4, regardless of grating is positive or reverse movement, the calculation method of decimal part
Subdividing error analysis
Because any measurement signals are not ideal, thus will bring certain measurement error, error sources are mainly the dc offset, signal amplitude and the orthogonality of two signals.
So, to this method, the data acquisition of the preamplifier circuit needs to be two way the signal amplitude to as big, will eliminate the dc component of the signal, the signal orthogonality by careful adjustment of the grating reading head to ensure that.
Although the subdivision method is put forward by grating measurement datum, but not limited to this.
Accordingly, to all can produce periodic two orthogonal sinusoidal signal measurement datum, this method is applicable, such as inductive synchronizer, magnetic grid or laser interferometer for sensor measuring system.
Trapezoidal velocity curve in time can be divided into three stages: the first stage of accelerating stage, motion shaft with maximum acceleration Ax to maximum speed Vx; Second stage for uniform motion, motion shaft with maximum speed Vx uniform motion; Is the third stage of the deceleration phase, movement shaft with the minimum speed reduction Ax slowed to a stop.
So, to this method, the data acquisition of the preamplifier circuit needs to be two way the signal amplitude to as big, will eliminate the dc component of the signal, the signal orthogonality by careful adjustment of the grating reading head to ensure that.
Although the subdivision method is put forward by grating measurement datum, but not limited to this.
Accordingly, to all can produce periodic two orthogonal sinusoidal signal measurement datum, this method is applicable, such as inductive synchronizer, magnetic grid or laser interferometer for sensor measuring system.
Trapezoidal velocity curve in time can be divided into three stages: the first stage of accelerating stage, motion shaft with maximum acceleration Ax to maximum speed Vx; Second stage for uniform motion, motion shaft with maximum speed Vx uniform motion; Is the third stage of the deceleration phase, movement shaft with the minimum speed reduction Ax slowed to a stop.
Online since: September 2020
Authors: Sasikarn Nuchdang, Dussadee Rattanaphra, Wilasinee Kingkam, Pipat Laowattanabandit
The surface area was analyzed according to the Brunauer-Emmet-Teller (BET) method using adsorption data over the relative pressure range of 0.05-0.30.
Pore size distribution and average pore diameter were determined by the Barrett-Joyner-Halenda (BJH) method using desorption data of the isotherms.
The BJH pore size distributions calculated from the desorption data revealed that the average pore size diameter of all diatomite samples in the ranging of mesoporus from 2-50 nm.
It suggests that the higher calcination temperature could induce the pore collaped, the sintering of prticles and blockage of smaller pores, which cause the reduction of surface area, the increasing of average pore size diameter and the decreasing of pore volume.
Pore size distribution and average pore diameter were determined by the Barrett-Joyner-Halenda (BJH) method using desorption data of the isotherms.
The BJH pore size distributions calculated from the desorption data revealed that the average pore size diameter of all diatomite samples in the ranging of mesoporus from 2-50 nm.
It suggests that the higher calcination temperature could induce the pore collaped, the sintering of prticles and blockage of smaller pores, which cause the reduction of surface area, the increasing of average pore size diameter and the decreasing of pore volume.
Online since: October 2012
Authors: Zhi Wang Zheng, Min Li Wang, Gong Ting Zhang
Eight thixotropic models were evaluated by least-square regressions based on experimental data.
Normally, all the parameters in models are determined through fitting of experiment data, which is the same to the following models.
Evaluation of thixotropic models For three loading conditions, after models mentioned above were integrated and dispersed, based on the principle of least square, experiment data were fitted.
Average deviation was taken as the measurement of a fitness of a model to experimental data.
Conclusions Based on the thixotropic experiment data of four kinds of waxy crude oils in three shearing ways, eight thixotropic models were evaluated.
Normally, all the parameters in models are determined through fitting of experiment data, which is the same to the following models.
Evaluation of thixotropic models For three loading conditions, after models mentioned above were integrated and dispersed, based on the principle of least square, experiment data were fitted.
Average deviation was taken as the measurement of a fitness of a model to experimental data.
Conclusions Based on the thixotropic experiment data of four kinds of waxy crude oils in three shearing ways, eight thixotropic models were evaluated.
Online since: October 2018
Authors: Vadim Aleksandrov, Denis Drugov, Mikhail Zavatskij, Andrey Ponomarev, Marsel Kadyrov
At that, the choice of efficient technologies can be made basing on the analysis of field-geological and laboratory data, as well as the analysis of previously conducted activities with account of facies genesis of reservoir rocks in the wells, where the geotechnical activities (GTA) are realized.
Using detailed field-geological analysis, the data obtained after the processing of a bottomhole formation area of the development wells with the application of hydrocarbon solvents and acid compounds was assessed.
The result is the mudding of the treated intervals pores of the productive object and the reduction of the permeability of the deposits for the formation fluids.
Using detailed field-geological analysis, the data obtained after the processing of a bottomhole formation area of the development wells with the application of hydrocarbon solvents and acid compounds was assessed.
The result is the mudding of the treated intervals pores of the productive object and the reduction of the permeability of the deposits for the formation fluids.
Online since: October 2010
Authors: Olga A. Shilova
Influence of small additives of the above-listed organic modifiers was shown in structure change of glass-ceramic coatings, improving their surface morphology and smoothness (i.e. reduction of a relief roughness), as well as increase in a thickness, flexibility and dielectric strength of these coatings.
Table 1: Surface roughness of glass-ceramic composite coatings depending on sol-gel synthesis conditions Roof-mean-square deviation* (the area 4 x 4 μm2) [nm] Homogenization procedures and presence of the organic modifier Mechanical mixing Ultrasound 22 kHz − Glycerin − Glycerin 350 270 260 240 */ Statistical manipulation of AFM-data Thus, not only the suspension composition, but also homogenization procedure of suspensions essentially influences on coating surface morphology.
The obtained data coincide with the general thermodynamic representations about ultrasound influence on materials, when a stage of structure ordering is preceded by a disordering stage.
Organic modifier Gelation time* [in days] Temperature of thermal effects**, ti [ºC] t1 – Removal of the physically-connected water and spirits t2 – Burning out of polyorganosiloxanes HB-16 5 150 300 HB-64 7 160 320 OUU 8 160 300 HB-12 9 170 340 Glicerin 9 180 350 PEG 300 10 190 370 */ Sol-gel transition – according to phenomenological observations; **/ Data of thermoanalysis.
The comparative analysis of data of scanning electron microscope (SEM), X-ray microanalysis and atomic-force microscopy has shown that during sintering of corundum particles with the modified surface (with the ‘skin’ layer) active interaction of the aggregated ceramic particles and formation of practically homogeneous conglomerates occur (Fig. 9 – 1а,b).
Table 1: Surface roughness of glass-ceramic composite coatings depending on sol-gel synthesis conditions Roof-mean-square deviation* (the area 4 x 4 μm2) [nm] Homogenization procedures and presence of the organic modifier Mechanical mixing Ultrasound 22 kHz − Glycerin − Glycerin 350 270 260 240 */ Statistical manipulation of AFM-data Thus, not only the suspension composition, but also homogenization procedure of suspensions essentially influences on coating surface morphology.
The obtained data coincide with the general thermodynamic representations about ultrasound influence on materials, when a stage of structure ordering is preceded by a disordering stage.
Organic modifier Gelation time* [in days] Temperature of thermal effects**, ti [ºC] t1 – Removal of the physically-connected water and spirits t2 – Burning out of polyorganosiloxanes HB-16 5 150 300 HB-64 7 160 320 OUU 8 160 300 HB-12 9 170 340 Glicerin 9 180 350 PEG 300 10 190 370 */ Sol-gel transition – according to phenomenological observations; **/ Data of thermoanalysis.
The comparative analysis of data of scanning electron microscope (SEM), X-ray microanalysis and atomic-force microscopy has shown that during sintering of corundum particles with the modified surface (with the ‘skin’ layer) active interaction of the aggregated ceramic particles and formation of practically homogeneous conglomerates occur (Fig. 9 – 1а,b).