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Online since: April 2014
Authors: Yulia V. Leskova, Anatoliy E. Nikiforov, Polina A. Agzamova
The calculation in the cluster approach describes the experimental data better than that in the frameworks of LDA and LDA+U model and modern crystal-field theory.
In the present paper we report ab initio calculations of the NMR parameters (υQ, η, Hc) and comparison of our result with experimental data.
The analysis of experimental and our theoretical data shown that the quadrupole frequency υQ cluster calculation results for LaTiO3 are in a good agreement with experimental data [6, 19] while computed value of the asymmetry parameter η is larger than experimental one.
The addition of diffuse orbitals to Ti wave functions leads to increase of Hc up to 80 kOe for both compounds that agrees with experimental data (see table 1).
The NMR parameters calculation in YTiO3 is not possible to compare with the experimental data.
In the present paper we report ab initio calculations of the NMR parameters (υQ, η, Hc) and comparison of our result with experimental data.
The analysis of experimental and our theoretical data shown that the quadrupole frequency υQ cluster calculation results for LaTiO3 are in a good agreement with experimental data [6, 19] while computed value of the asymmetry parameter η is larger than experimental one.
The addition of diffuse orbitals to Ti wave functions leads to increase of Hc up to 80 kOe for both compounds that agrees with experimental data (see table 1).
The NMR parameters calculation in YTiO3 is not possible to compare with the experimental data.
Online since: April 2014
Authors: Xiao Ming Tao, Bin Gang Xu, Hua Yang Yu, Jian Liang Gong
Fig. 3 UV-Vis diffuse reflectance spectra of porous APS and APST coatings
Fig. 4 NOx reduction efficiency of different asphalt composite coatings.
The NOx reduction efficiency of the honeycomb structured asphalt composite coatings with different TiO2 contents was quantified in the laboratory.
The change of NOx reduction efficiency during the whole process was calculated according to the recorded data, as shown in Fig. 4.
Nevertheless, both APST-H and APST-L always keep at high NOx reduction efficiency with no attenuation.
Laboratory evaluation demonstrated that the NOx reduction efficiency of honeycomb-microstructured coatings increases up to 40%, higher than that of compacting sample (24%).
The NOx reduction efficiency of the honeycomb structured asphalt composite coatings with different TiO2 contents was quantified in the laboratory.
The change of NOx reduction efficiency during the whole process was calculated according to the recorded data, as shown in Fig. 4.
Nevertheless, both APST-H and APST-L always keep at high NOx reduction efficiency with no attenuation.
Laboratory evaluation demonstrated that the NOx reduction efficiency of honeycomb-microstructured coatings increases up to 40%, higher than that of compacting sample (24%).
Online since: March 2009
Authors: Sandro Solmi, Roberta Nipoti, Francesco Moscatelli, Antonella Poggi, Fabrizio Tamarri, G. Pizzochero
A strong correlation among the increasing of the N concentration at the SiO2/SiC interface,
the reduction of the interface state density located near the conduction band and the improvement of
the MOSFETs performance was obtained.
The main effect of the N implantation is the reduction of the electron interface trap density, Dit, located near the conduction band [4], with a consequent increase of the electron channel conductivity of the transistor [3].
However, a N pile-up near the surface due to a segregation coefficient between SiC and SiO2 greater than unity [8] should make the reported data on N concentration at the SiO2/SiC interface slightly underestimated.
Therefore, the transversal electric field dependence of the field effect mobility reported in Fig. 2 suggests a reduction of the interface trap concentration related with the N presence at the SiO2/SiC interface.
Furthermore, the decrease of Vth as the Nint increases is easy explained with the reduction of the negative charge at the interface due to the reduced Dit.
The main effect of the N implantation is the reduction of the electron interface trap density, Dit, located near the conduction band [4], with a consequent increase of the electron channel conductivity of the transistor [3].
However, a N pile-up near the surface due to a segregation coefficient between SiC and SiO2 greater than unity [8] should make the reported data on N concentration at the SiO2/SiC interface slightly underestimated.
Therefore, the transversal electric field dependence of the field effect mobility reported in Fig. 2 suggests a reduction of the interface trap concentration related with the N presence at the SiO2/SiC interface.
Furthermore, the decrease of Vth as the Nint increases is easy explained with the reduction of the negative charge at the interface due to the reduced Dit.
Online since: November 2013
Authors: Mohamad Amran Mohd Salleh, B.S. Bidita, Azni B. Idris, Suraya Abdul Rashid
A reduction in the concentrations of exhaust gas emissions was notified.
Although some anomalies are observed to the data, but overall a reduction in CO emissions was found using W/D nanoemulsions compared to the neat diesel.
In spite of having some fluctuations in the data, the general observation was an overall reduction in CO2 emissions using W/D nanoemulsions compared to the neat diesel.
An overall reduction in NH3 emissions was observed using W/D nanoemulsions compared to the neat diesel.
Although some anomalies are observed to the data, but overall a reduction in CO emissions was found using W/D nanoemulsions compared to the neat diesel.
In spite of having some fluctuations in the data, the general observation was an overall reduction in CO2 emissions using W/D nanoemulsions compared to the neat diesel.
An overall reduction in NH3 emissions was observed using W/D nanoemulsions compared to the neat diesel.
Online since: September 2013
Authors: Fu Jun Zhang, Chang Lu Zhao, Waleed Nessim, Zhen Xia Zhu
However, the controlled thermal management system has not been significantly employed for further reduction of specific diesel oil consumption and increase of truck mileage.
Firstly, the cooling system model was validated with experimental data, and then replaced with an advanced controlled thermal management system using a 1-D simulation model.
Thermal management System Avails The overall aim of any engine thermal management strategy is to achieve the desired stable engine operating temperature as quickly as possible, thus minimizing engine frictional losses through lubricant viscosity reduction, reducing warm up time, and delivering cabin heater performance within as short a timeframe as possible [3].
Engine main data Engine Characteristic Parameters Compression ratio 17.5 Firing order A1 B3 A3 B2 A2 B1 Cylinder arrangement V form at angle 90 ° Working cycle 4 Stroke Number of cylinders 6 Rated speed range (rpm) 1800:2100 Cylinder Geometry Bore/Stroke (mm) 132 / 145 Engine Displacement (ltr.) 11906 The controlled cooling system model is integrated to Simulink for the purpose of controlling the fan speed, pump speed and the electrically actuated thermostat in order to increase the flexibility of the cooling system to an optimum level .
The integrated model was validated using the experimental data of engine performance and thermal balance experiment which has conducted in “Power Mechanism and Engineering Laboratory, BIT”.
Firstly, the cooling system model was validated with experimental data, and then replaced with an advanced controlled thermal management system using a 1-D simulation model.
Thermal management System Avails The overall aim of any engine thermal management strategy is to achieve the desired stable engine operating temperature as quickly as possible, thus minimizing engine frictional losses through lubricant viscosity reduction, reducing warm up time, and delivering cabin heater performance within as short a timeframe as possible [3].
Engine main data Engine Characteristic Parameters Compression ratio 17.5 Firing order A1 B3 A3 B2 A2 B1 Cylinder arrangement V form at angle 90 ° Working cycle 4 Stroke Number of cylinders 6 Rated speed range (rpm) 1800:2100 Cylinder Geometry Bore/Stroke (mm) 132 / 145 Engine Displacement (ltr.) 11906 The controlled cooling system model is integrated to Simulink for the purpose of controlling the fan speed, pump speed and the electrically actuated thermostat in order to increase the flexibility of the cooling system to an optimum level .
The integrated model was validated using the experimental data of engine performance and thermal balance experiment which has conducted in “Power Mechanism and Engineering Laboratory, BIT”.
Online since: June 2014
Authors: Zhong Hong Yang, Yang Yang, Xiao Hui Chen
China’s tourism will face increasingly severe pressure from low carbon and emission reduction.
Data and Method Data Source.
The data includes: 1) Scale and occupancy rate of China’s star-rated hotel rooms in 2009, based on The Yearbook of China Tourism Statistics 2010 (Supplement). 2) Energy requirements of star-rated hotel rooms per bed night, based on the data provided by Jinhe[5]. 3) Railway, roads and waterway passenger-kilometer of 31 Chinese provinces in 2009, based on China Statistic Yearbook 2009. 4) Limited to the difficulty in collecting data, aviation passenger kilometers of 31 Chinese provinces in 2008 is used to replace the data in 2009, based on the China Compendium of Statistics 1949-2008. 5) Tourism Industry revenue of China’s 31 provinces in 2009, based on The Yearbook of China Tourism Statistics 2010 (Supplement). 6) Carbon emission factors for railway, roads, waterway and aviation, based on the data provided by Yanxu and et al.
Considering the collection of statistics data of tourism transportation, passenger-kilometer can be quoted directly because tourism transportation is part of the passenger transportation.
Considering completeness and reliability of data collection, the paper takes star-rated hotels for object.
Data and Method Data Source.
The data includes: 1) Scale and occupancy rate of China’s star-rated hotel rooms in 2009, based on The Yearbook of China Tourism Statistics 2010 (Supplement). 2) Energy requirements of star-rated hotel rooms per bed night, based on the data provided by Jinhe[5]. 3) Railway, roads and waterway passenger-kilometer of 31 Chinese provinces in 2009, based on China Statistic Yearbook 2009. 4) Limited to the difficulty in collecting data, aviation passenger kilometers of 31 Chinese provinces in 2008 is used to replace the data in 2009, based on the China Compendium of Statistics 1949-2008. 5) Tourism Industry revenue of China’s 31 provinces in 2009, based on The Yearbook of China Tourism Statistics 2010 (Supplement). 6) Carbon emission factors for railway, roads, waterway and aviation, based on the data provided by Yanxu and et al.
Considering the collection of statistics data of tourism transportation, passenger-kilometer can be quoted directly because tourism transportation is part of the passenger transportation.
Considering completeness and reliability of data collection, the paper takes star-rated hotels for object.
Online since: October 2015
Authors: Martin Müller, Réjane Hörhold, Marion Merklein, Gerson Meschut
The numerically gained results are validated by experimental data.
This paper shows an evaluation of possible methods to simulate the cutting operation in a commercial available simulation program and the validation of the results by experimental data.
Therefore the experimental data is measured using the microhardness measurement system Fischerscope® HM2000.
Preliminary results show a good match of experimental and simulative data.
By validating a suitable element removal threshold with experimental data it is possible to analyze different tool designs for a given material combination.
This paper shows an evaluation of possible methods to simulate the cutting operation in a commercial available simulation program and the validation of the results by experimental data.
Therefore the experimental data is measured using the microhardness measurement system Fischerscope® HM2000.
Preliminary results show a good match of experimental and simulative data.
By validating a suitable element removal threshold with experimental data it is possible to analyze different tool designs for a given material combination.
Online since: July 2013
Authors: Timo Fabritius, Aki Kärnä, Mika Järvinen
Models are validated with supersonic nozzle data and wall impinging jet mass transfer data from literature.
The adjusted model was tested with NASA supersonic jet data [6,7].
Fabritius: A mathematical model for the reduction stage of the AOD process.
Fabritius: A mathematical model for the reduction stage of the AOD process.
The adjusted model was tested with NASA supersonic jet data [6,7].
Fabritius: A mathematical model for the reduction stage of the AOD process.
Fabritius: A mathematical model for the reduction stage of the AOD process.
Online since: March 2015
Authors: Yang Li, Xiao Sheng Wu, Wei Ping Zhang, Wen Yuan Chen
The external memory interfaces of F28335 include 20 address lines, 16-bits of data lines, three chip select control lines and write control lines.
XZCS7 chip selecting signal can be used to map the collected data to Zone7, which starting address is 0x200000.
When SER/PAR pin is low, the chip works on parallel mode, and with W/B in low, parallel data line DB[15:0] can be used in data transmission with AD7656.
After statistical analysis of sampling data taken in different periods, it could be found that means of data pre-filter and filtered are respectively 8.40mV and 8.15mV, while standard deviations are respectively 4.01mV and 1.13mV, thus the standard deviation decreases by 71.8%.
[4] Preliminary Technical Data of AD7656[S] Analog Devices
XZCS7 chip selecting signal can be used to map the collected data to Zone7, which starting address is 0x200000.
When SER/PAR pin is low, the chip works on parallel mode, and with W/B in low, parallel data line DB[15:0] can be used in data transmission with AD7656.
After statistical analysis of sampling data taken in different periods, it could be found that means of data pre-filter and filtered are respectively 8.40mV and 8.15mV, while standard deviations are respectively 4.01mV and 1.13mV, thus the standard deviation decreases by 71.8%.
[4] Preliminary Technical Data of AD7656[S] Analog Devices
Online since: September 2013
Authors: Yan Yao Zhou, Shi Hong Zhang, Le Qiang Bai
The algorithm processes the properties of the data objects, which determines the density of data object by counting the number of similar data objects and selects the center of categories according to the density of data object.
In this paper, inspired from the ideas of a fast K-Means clustering algorithm based on grid data reduction [9], we propose an enhanced K-Means algorithm based on category initial point selection (BIPSD_K).
Then, statistics the number of data objects which fall in the same interval, calculating the density of the data object.
Secondly, the data set is divided data set by iterative loop.
S= {S1, S2,…,Sn} is n dimensional data space, and Si= [Li, Hi].
In this paper, inspired from the ideas of a fast K-Means clustering algorithm based on grid data reduction [9], we propose an enhanced K-Means algorithm based on category initial point selection (BIPSD_K).
Then, statistics the number of data objects which fall in the same interval, calculating the density of the data object.
Secondly, the data set is divided data set by iterative loop.
S= {S1, S2,…,Sn} is n dimensional data space, and Si= [Li, Hi].