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Online since: October 2013
Authors: Saad Ahmed
The main task of their work is to increase the knowledge and the amount of available data to characterize rotating stall phenomena.
Figure 5 shows the percentage of flow reduction for all cases above.
However, the highest reduction in critical flow coefficient could be achieved by attaching the rough surface to the shroud rather than the hub side (see Figures 4 and 5).This observation contradicts with the results reported by Ishida et al. [2] that showed the highest reduction in flow coefficient could be achieved by attaching the rough surface to the hub side.
Reduction in critical flow coefficient due to wall roughness for Do/Di = 2.0 and different sandpaper.
Hayder Salem and the undergraduate students at AUS who secured the experimental data.
Online since: December 2012
Authors: Alain Fuser, Jack Copper
Neuron for Unsupervised Learning Data Preparation.
Outages are simply handled by a percentage reduction coefficient, defined from historical data.
Classically 30% of data are used for validation.
In every case the networks trained on both providers’ data are better for any weather data type.
Cascaded ensembles are specified not only from weather data types but also from clusters of historical data.
Online since: March 2012
Authors: Hui Guo, Jie He
Image Compression Technology Based on the Analysis Theory of Wavelet Hui Guo1, a , Jie He2, b 1 Department of Electronics Information Engineering,Wuzhou University,Wuzhou, 543002,China 2 Computer Science Department,Wuzhou University,Wuzhou, 543002,China a,b huiguo12@yeah.net Keywords: Image compression; Wavelet transform; Mallat algorithm; Abstract.Due to the huge amount of image data transmission conditions and the existing relative low, makes the image compression become inevitable, key technology of image compression for image data transform to transform the quantitative data, as well as to the quantitative data, after the entropy coding.And this article USES the 2 d Mallat of wavelet image compression algorithm is a kind of common image compression method of wavelet image compression algorithm is the core.
Introduction With modern information society for communications business requirements growth, images, communication and network capacity of the increasingly prominent contradiction between, especially those with large amount of data digital image communication, it is difficult to transfer and storage.
The basic principle of image compression Image coding point of research is allowed in a certain image distortion of conditions (including visual effect,), such as the realization of image information data compression.
The system will come from the source image signal after PCM encoder for pulse code modulation (PCM), the compression encoder to compress image data unrelenting, then eliminate the image data redundant code words, image compression of the basic principle as shown in figure 1 shows.
The above results arithmetic coding The algorithm for the 4 x 4 pieces of 128 bit data, plain area only two coding, time with a flat area 19 coding, time with a texture area 36 coding, texture in 2 + zone 16 x 5 + 6 + 6 = 94 a coding.
Online since: September 2014
Authors: Shuo Wang, Xiao Han
In this paper, based on the dynamic partitioning results of the intersection group provided by the software and data collected by traffic flow detectors, the features of dynamic partitioning software for intersection group are further explored from two aspects: traffic control and emergency response to traffic accidents, using the method of green-wave control and traffic guidance respectively.
Introduction In the previous study[2], the intersection group partitioning software has been used to input the real-time traffic data in the road network detected by the traffic flow detector into the partitioning software which can select key intersections in the road network and judge the correlations between intersections using the road section correlation model.
After the accident, the reduction in traffic capacity is reflected in the reduction of lanes available in number (n) and lane width correction factor.
Online since: September 2014
Authors: Nikita V. Martyushev
The data about formation of lead inclusions between dendrites of a copper matrix are published as well.
The researches representing quantitative data about microstructure parametres formed under various conditions of crystallisation are practically missing.
With reduction of cooling rate (increasing of heating temperature of a casting mould) happens a reduction of length and thickness of columnar crystals and at cooling rate 25°C/s (fig. 1c) and lower this zone disappears absolutely.
The difference for high cooling rates is 2 and more times, with reduction of cooling rate this ratio decreases and, for example, at Vcool=10°С/s is 1.3-1.5 times.
At that the obtained data say that at high cooling rate 120-160°С/s distances between axes of the dendrites of the second order will have size 10-15 microns.
Online since: March 2015
Authors: Steven Y. Liang, Jian Guo Yang, Qian Xiang, Zhi Jun Lu, Lan Xu, Bin Liu
Given the actual production process is difficult to get an exception batch mode data, in accordance with the usual practice of the field, we took Monte Carlo simulation method to generate data for the model to verify the correctness and validity.
Processing status, changes in the production, can be distinguished from time domain characteristic parameter index of quality data [6-7].
The uniform mutation operator is selected to complete this procedure. 4 Simulation results 4.1 Generation of training data set Data formula description is generated according to the control chart pattern.
Data of 150 sets of each model is used as the training set, the remaining 50 groups as a test set.
The data must first be normalized in each time window, and the normalized sample numbers are put in the model for pattern recognition.
Online since: July 2016
Authors: Zhao Hui Wang, Cheng Hao Luan, Bao Ju Li, Jia Tai Yang
Within the scope of the experimental data, the research shows that: with the increase of billet preheating temperature, the wear is reduced gradually.
Fig. 7 shows that the increasing of the billet preheating temperature (1080℃~1280℃) would cause the reduction of die surface pressure(364MPa~158MPa) and elevated temperature(485℃~531℃).
The leading role which leads the wear value decreases(5.79´10-4 mm~3.14´10-4 mm)is the reduction of the pressure.
In the range of experimental data, according to the results of numerical simulation, it is concluded that: (1) The increasing of the billet preheating temperature would cause the reduction of die surface pressure and elevate temperature.
The leading role which leads the wear value decreases is the reduction of the pressure.
Online since: January 2012
Authors: Gao Zhong Li, Qiu Ling Cao, Lin Wang
The function of this database includes data input, data maintenance, data query, data mining and data application.
The function of this database includes data input, data maintenance, data query, data mining and data application. 1.
Data collection and reduction The data of unearthed textiles came from references such as Cultural Relics, Archaeology, Journal of Archaeology, and so on.
Database construction The function of this database includes data input, data maintenance, data query, data mining and data application.
The data increase, revision and deletion could be operated by single record, batch processing or inputting bulk data from other documents, such as Excel file.
Online since: April 2016
Authors: Krzysztof Lipiński
Performed tests proofed that signal of the proportional-derivative controller is a useful data base for the required identification process.
They allow us to identify the mass of the payload and to improve data in the model-based controller.
The signal obtained form the PD feedback loop is used as a data base for identification of the payload inertia.
Resulting torques (i.e., the output data of the second sub-block) are considered as the input data of the sub-block devoted to model the plant (the controlled object).
Steinbuch, Data-based spatial feedforward for over-actuated motion systems, Mechatronics 24 (2014) 679–690; [3] M.J.C.
Online since: September 2013
Authors: A.K.M. Nurul Amin, Muammer Din Arif, Muhd Amir Hafiz B. Ahamad Mohrodi, Israd H. Jaafar
The developed chip serration model shows good agreement with experimental data.
Investigations into the causes of chatter and its subsequent avoidance or reduction is therefore of utmost importance.
Thus, a damping technique, for instance magnetic damping from tool side to dampen tool holder vibration, will reduce chatter and this reduction should show up in the chip serration.
The data acquisition system comprised an accelerometer (Kistler 50g), for vibration data acquisition; a Dewetron module, for signal conditioning; and a National Instruments DAQ card (model: PCI-6023E), for interfacing with the Dell workstation.
Fig. 4: Photograph of the magnet setup Fig. 3: 3-D Catia model of the special fixture Response Surface Model A 3 factors 5 levels simple CCD model was developed in RSM using DOE software to model chip serration frequency from empirical data.
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