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Online since: April 2014
Authors: Jun Jie Liu, Qiu Xiang Wu, Miao He, Li Yu Tian
Introduction 4D trajectory simulating radar track algorithm includes "4D trajectory simulation", "coordinate transformation ","simulation of standard radar data frame ", " communication link quality simulation " and several other aspects.
Accordingly, in this article for each of these elements is assigned the corresponding data resources, in accordance with the properties of the above can be divided into four categories: spatial data, track data, weather data, aircraft performance data; however in accordance with their mutual relations it can be divided into static data, baseline forecast data and baseline forecast verification data.
Build model of these data, 4D trajectory prediction model is composed of three models: the weather model, control intention model and virtual flight model control (VFMC).
Comprehensively analyze, the error may exists in the following aspects: intent error, aircraft performance model, the original data error. [8] 1 An intent error: Mostly unpredictable flight intention of flight pilots and controllers deploy the aircraft’s altitude and speed adjustment to avoid the flight conflict; 2 Aircraft performance model : set a value of the aircraft performance indicators when build a modeling, but the actual flight change along with the outside world conditions real-time, such as the turning angle of inclination is given a fixed value, idle thrust changes with airport barometric pressure, different elevation are changing when the aircraft is descending ; 3 The original data error: mainly refers to incomplete, inaccurate or outdated flight plan, airspace structure data.
C.; Gonda, John; Mead, Rob; Saccone, Greg The 4D Trajectory Data Link (4DTRAD) Service - Closing the loop for air traffic control Source: Proceedings of the 2009 Integrated Communications, Navigation and Surveillance Conference, ICNS 2009 [9] Zillies, J.L.
Online since: June 2019
Authors: Urs A. Peuker, Christos G. Aneziris, Thomas Leißner, Jens Fruhstorfer, Jana Hubálková
A (partial) carbothermal reduction of alumina at 1550 ◦C was proposed.
In order to attain volume data of a sufficient resolution as well as an appropriate size (3D field of view (FOV)), the scans had voxel sizes of 2.7 µm.
During the reduction, the corresponding gaseous species and also CO formed.
Carbothermic reduction of alumina at 1823K: On the role of molten iron and reaction mechanisms.
Calciothermic reduction of TiO2: A diagrammatic assessment of the thermodynamic limit of deoxidation.
Online since: November 2012
Authors: Ya Nan Zhang, Tadaatsu Satomi, Wen Si
The results show that by optimizing orifice diameter and orifice layouts, good effect on reduction of self-excited vibration can be achieved, with the time of vibration attenuation reduced from 1.8s to 0.9s.
Because of the compressibility of the air working as the medium of aerostatic stage, it is easy to cause small self-excited vibration, which results in reduction of guiding and positioning accuracy.
Thus, this paper studied on the reduction of self-excited vibration of aerostatic stage through decreasing the diameter of orifice and changing the structure of orifice, by both theoretical and experimental means.
Data of the flow coefficient of orifice and differential pressure are obtained through this experiment, then using the method mentioned in the previous section to acquire function expressions between flow coefficient and differential pressure under the circumstance that orifice diameter is 0.3mm (see Fig.4 for reference):
Online since: September 2013
Authors: Hong Lin, Yu Yue Chen, De Suo Zhang, Yan Fen Liao
When the concentration of HBP-NH2 and zinc nitrate were 24 g/L and 17.85g/L respectively, the UPF value of treated silk fabric was 131 and the bacterial reduction rates against Staphylococcus aureus and Escherichia coli both exceeded 99%.
The output data clearly state the formation of nanoparticles of zinc oxide on treated silk fiber surface as shown in Figure 4.
The bacterial reduction rates all exceeded 99.9%.
When the concentration of HBP-NH2 and zinc nitrate were 24 g/L and 17.85g/L respectively, the UPF value of treated silk fabric was 131 and the bacterial reduction rates exceeded 99.9%.
Online since: January 2013
Authors: Chii Ruey Lin, Da Hua Wei, Minh Khoa Ben Dao, Ren Jei Chung, Ming Hong Chang
The size reduction and structural evolutions of the milled samples were investigated as a function of the milling time by means of X-ray diffraction, and field emission scanning electron microscopy.
Aside from size reduction, the advantage of HEBM is that the structural evolution as well as phase transformation of the grinded materials could be entirely controlled through milling parameters.
It should be noticed that structural alteration of diamond powder, as a result of crystal deformation during milling process, has great influence on performance of the size reduction process and quality of as-prepared ND particles.
The graphitization as well as forming amorphous phase of diamond in HEBM process is not understood well yet; our data, however, suggests that non-diamond carbon phase were produced and attributed to the formation of iron carbide composite under milling conditions.
Online since: November 2013
Authors: Corrado lo Storto
The size of sample was kept small to assure acceptable accuracy and completeness of data.
Data shows that scale diseconomies are important and 25 companies are scale inefficient.
Table 4 displays data relative to scale inefficiencies and returns to scale typologies for scale inefficient companies.
Acknowledgements The support provided by Daniela Di Mario to collect data is gratefully acknowledged.
Rappuoli, Optimal scale in the Italian gas distribution industry using data envelopment analysis, Omega Vol. 36 (2008), pp. 325–336
Online since: November 2013
Authors: Vasile Danut Cojocaru, Doina Raducanu, Ion Cinca, T. Gloriant, Cristina Mariana Tabirca, Doina Margareta Gordin, Cătălin Iulică Nae, Andreea Caprarescu, Isabelle Thibon
Data concerning alloys component phases, average coherent crystallite size and internal average micro-strain was obtained.
The present study investigates the microstructures and the mechanical properties of a Ti-29Nb-9Ta-10Zr (wt.%) alloys in order to investigate structural changes occurred during recrystallization treatment of 90 % cold rolled using X-ray diffraction, in order to determine data concerning alloys component phases, average coherent crystallite size and internal average micro-strain.
The as-cast alloy was processed by cold-rolling deformation with a 90% total thickness reduction, followed by a recrystallization heat treatment.
Data concerning alloys component phases, average coherent crystallite size and internal average micro-strain was obtained.
By applying an intense cold-rolling (reduction up to 90%) deformation processing a nanometrical microstructure, consisting in a mixture of β-Ti and α″-Ti phases is obtained; this nanometrical microstructure is retained also after the recrystallization treatments.
Online since: October 2010
Authors: Vilma Ducman, Urška Lavrenčič Štangar, Marko Kete, Urh Černigoj
The data reported herein correspond to the stable value of the angles obtained by averaging three repeated measurements.
Upon illumination, the dye is reduced by the photogenerated electrons to the form of a different colour (resazurin reduction) [6] or to the bleached form (2,6-dichloroindophenol reduction) [7].
A fitting of the data according to a simplified kinetic analysis has been performed for the initial degradation (till the plateau).
(2) The fitted curves for three different photocatalyst surfaces are presented in Fig. 9 and the correlation between experimental and fitted data is fairly valid for the initial irradiation time.
In order to quantify the data, the time to achieve half decrease of the initial CA was obtained from the curves and the data are collected together with the fluorescence data in Table 1.
Online since: September 2021
Authors: Rola Hasbini, Julia Nerantzia Tzortzi
Moreover, micro-analysis of data would efficiently optimize the design of the granular concrete constituents.
Other obstacles faced by green mixture solutions are compliance with regulatory standards, non-suitability for various structural performances and applications, and lack of durability data spanning twenty years or more [23].
Furthermore, performance data should be strictly monitored and should form the basis for further development and research.
Reliable analytical, experimental, and numerical models are to be developed while documenting field data.
Recently, the Internet of Things (IoT) infrastructure, in smart cities, promise comprehensive structuring of coherent sustainable data pipelines.
Online since: December 2012
Authors: Shen Xue, Xu Wang, Wen Le Bai, Yong Mei Zhang
It directly affects the quality of sending data.
The correctness of the rate-matching directly affects the quality of sending data. [1][2][3].
According to the data length of every TrCH under the limit of data length in an CCtrCH, they are processed by the following procedure.
The simulation results semi-static performances the number before multiplexing Punch or repeat The disposed number the number after multiplexing Simulation 1 TrCH01 1 150 punch -106 44 TrCH02 3 150 punch -17 133 TrCH03 5 150 repeat +73 223 Simulation 1 TrCH01 4 150 repeat +50 200 TrCH02 2 150 punch -50 100 TrCH03 2 150 punch -50 100 In simulation1, most data bits of TrCH01 are punched just because of its lower semi-static performances, it has to wait for the next multiplexing, but TrCH03 will be served a higher data quality than TrCH02.In simulation 2, after multiplexing,TrCH01 has a better data quality than that of the other two , but TrCH02 and TrCH03 have the same serving quality.
The results shows that as long as the data length for one CCTrCH are limited to one range , the higher of semi-static performances, the higher quality requirements of the data for one TrCH, which means needing more added bits to be transmitted, and vice versa.
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