71,860 Hits in 9.7 sec

Increasing the performance of arbitrary waveform generators using periodic sigma-delta modulated streams

B. Dufort, G.W. Roberts
2000 IEEE Transactions on Instrumentation and Measurement  
This paper describes a new method to increase the performance of existing arbitrary waveform generators (AWG's).  ...  By encoding the digital words using sigma-delta (61) techniques, it is possible to decrease the noise floor in a narrow band while keeping the same memory requirements.  ...  Fig. 21 . 21 Dynamic calibration using subsampling. The sample-and-hold circuit (S/H) is clocked N +1 times slower than the AWG, which allows the measurement at low speed of a high-speed AWG.  ... 
doi:10.1109/19.836332 fatcat:uhqr4gkzejcg3o7qjuduzguv3m

Development of Frequency Discriminated Simulative Target Generator Based on DRFM for Radar System Performance Evaluation

Myung-Soo Chung, Woo-Sung Kim, Chang-Ok Bae, Seung-Min Kang, Dong-Chul Park
2011 Journal of the Korean Institute of Electromagnetic Engineering and Science  
Simulative target generators are needed for testing and calibrating various radar systems.  ...  This paper proposes a novel architecture for controlling the digital RF memory so it continually writes ADC data to the memory and reads it for the DAC with increasing one step address in order to control  ...  ADC, DAC, and a high speed memory.  ... 
doi:10.5515/jkiees.2011.11.3.213 fatcat:mt3pa7xyafandajr2sc2e2ggci

Self‐healing digital‐to‐analogue converter architecture for communication equipment with ordered element‐matching technology

Jin‐Chern Chiou, Tzu‐Sen Yang
2021 The Journal of Engineering  
An attempt was made to establish self-healing architecture using ordered element-matching (OEM) technology for ageing or partially damaged components of digital-to-analogue converter (DAC) components used  ...  Using OEM technology, damaged DAC components, such as memory cells, current cells and current cell control switches, can be healed. The performance before and after healing is compared in this work.  ...  Because this proposal uses OEM technology, it needs memory. For high-resolution DAC, a trade-off between memory size and conversion speed is necessary.  ... 
doi:10.1049/tje2.12063 fatcat:ehmjwn3pxnf6lgljsmyfamfivi

Calibration of LOFAR data on the cloud

J. Sabater, S. Sánchez-Expósito, P. Best, J. Garrido, L. Verdes-Montenegro, D. Lezzi
2017 Astronomy and Computing  
to be analysed is not high, or if the costs of maintaining a system capable of calibrating LOFAR data become high.  ...  The calibration of these data presents a huge challenge for final users: a) extensive storage and computing resources are required; b) the installation and maintenance of the software required for the  ...  Scientific and technological preparation for the SKA' (AYA2014-52013-C2-1-R) and 'AMIGA6: gas in and around galaxies.  ... 
doi:10.1016/j.ascom.2017.04.001 fatcat:2x5f2ogpifbzvo5pb4p52nkcdy

A High Performance DDR3 SDRAM Controller

Shabana Aqueel, Kavita Khare
2012 International Journal of Electronics and Electical Engineering  
However, because of the high-speed interface technology and complex instruction-based memory access control, a specific purpose memory controller is necessary for optimizing the memory access trade off  ...  In this paper, a specific purpose DDR3 controller for highperformance is proposed.  ...  Test equipment for verification of the circuit is no longer available at low costs. The "Fly-By" timing technology puts the burden on system calibration.  ... 
doi:10.47893/ijeee.2012.1001 fatcat:cfw2vzwtqzcffaimeabfy4sofy

Calibration of LOFAR data on the cloud [article]

J. Sabater, S. Sánchez Expósito, P. N. Best, J. Garrido, L. Verdes-Montenegro, D. Lezzi
2017 arXiv   pre-print
We found no significant impediments associated with the speed of data transfer, the use of external block storage, or the memory available.  ...  The calibration of these data presents a huge challenge for final users: a) extensive storage and computing resources are required; b) the installation and maintenance of the processing software is not  ...  and "Amazon Cloud Processing of LOFAR Tier-1 surveys: Opening up a new window on the Universe".  ... 
arXiv:1704.05064v1 fatcat:qcmwsb7dybbqlhn2yfsf67sh4i


A.M. Elsbaay, R. A. Hegazy
2016 Misr Journal of Agricultural Engineering  
The device has been calibrated with standard method of using volumetric flow rate recorded through precise device made for that purpose. 110 hp New Holland tractor and a 16 hp medium size engine have been  ...  under high and low forward speed of the combine respectively.  ...  tested tractor.Fig. 8 Average fuel consumed by tractor engine in different test condition Speed Load Start time End time Test time, min.  ... 
doi:10.21608/mjae.2016.97584 fatcat:g4oopebgkfg6xewc2q2vdniwqu

Embedded Transient Shock Signal Storage Test Technique under High Overload

Zhang Yi, Zhang Rong, Zhou Jikun, Chen Ying
2015 Procedia Computer Science  
It is of small size, low power consumption, capable of working under high impact acceleration and good engineering practicability validated by a drop test.  ...  at least high overload of 60000g through the static and dynamic calibration device.  ...  Cali brati on methods and experiments To test the performance of the assembled set, the calibration experiment must be done.  ... 
doi:10.1016/j.procs.2015.05.152 fatcat:xle4yjzairbltoift6gk72b47u

A Multi-objective Approach for the Calibration of Microscopic Traffic Flow Simulation Models

Carlos Cobos, Alexander Paz, Julio Luna, Cristian Erazo, Martha Mendoza
2020 IEEE Access  
Three traffic flow models of different dimensionality and complexity were used to test the performance of seventeen metaheuristics for solving the calibration problem.  ...  The calibration of traffic-flow simulation models continues to be a significant problem without a generalized, comprehensive, and low-cost solution.  ...  FIGURE 22 . 22 NRMS versus search time using MOGBHS, GASA, and SPSA for the calibration of the high dimensionality model.  ... 
doi:10.1109/access.2020.2999081 fatcat:wehtmim24rafvicgm6rv7eqwfu

Performance Study of Satellite Image Processing on Graphics Processors Unit Using CUDA

In-Kyu Jeong, Min-Gee Hong, Kwang-Soo Hahn, Joonsoo Choi, Choen Kim
2012 Korean Journal of Remote Sensing  
Acknowledgements The authors would like to thank the two reviewers for their valuable comments and their helpful contribution in improving this article.  ...  And we propose a new Korean Journal of Remote Sensing, Vol.28, No.6, 2012 platform in this study for improving the speed of high-resolution satellite image data processing.  ...  In our experiment, we tested the speed of both the CPU and GPU versions of the conversion to Landsat-7 ETM+ spectral radiance calibration algorithm.  ... 
doi:10.7780/kjrs.2012.28.6.8 fatcat:ydu3nft3dravljscr6a7goffsi

Decreasing Computational Time of Urban Cellular Automata Through Model Portability

Charles Dietzel, Keith C. Clarke
2006 Geoinformatica  
Regardless, the research demonstrates that the portability of a model can lead to not only to a decrease in computation time, but may increase the viability in practical applications and attract a wider  ...  The portability problem is not a trivial one, as many geographic models are designed to be run inside a set environment (Unix, Solaris, Linux, and Windows), and are further limited by hardware constraints  ...  Public Policy Institute of California for the use of their Sun Fire server.  ... 
doi:10.1007/s10707-006-7579-0 fatcat:aznn4lmysfbevlwwhwkavtuomi

Modeling and analysis of soft-test/repair for CCD-based digital X-ray systems

B. Jin, N. Park, K.M. George, M. Choi, M.B. Yeary
2003 IEEE Transactions on Instrumentation and Measurement  
It tests the images to detect the detective pixels and filter noise at the frame memory level and caches them in a flash memory in the controller for future repair.  ...  Hard-repair approach employs a high-yield, expensive reparable CCD to minimize the impact of hard defects on the CCD, which occur in the form of noise propagated through A/D converter to the frame memory  ...  The proposed CCD soft-testing/repair process scans for the soft defects on the frame memory for a certain amount of time (i.e., referred to as ).  ... 
doi:10.1109/tim.2003.818735 fatcat:455hdfk7ojds7dkuiuq5sz7rqa

Emerging Trends in Instrumentation in Rocket Motor Testing

Arun Kumar, L. Anjaneyulu
2015 Defence Science Journal  
This limitation was due to onboard solid-state memory, and due to this limitation, high speed photography camera was preferred over high speed video camera.  ...  Pressure transducers are calibrated before and after the test by dead weight tester using nine-point calibration method.  ... 
doi:10.14429/dsj.65.7949 fatcat:6txik3esdvdtneoildhscrpeie

A Methodological Approach to High Precision Measurement of Dynamic Torque of Engine

Z. Dongqing, S. Tiexiong
2010 Chemical Engineering Transactions  
It will avoid spending the massive time, the manpower and the physical resource. This test plan convenient, nimble, the precision is high.  ...  This test recording system structure is simple, and the function is reliable, has realized the precision measuring, to the sensor precision request is not too high.  ...  The Whole Structure Project A device is designed for measuring dynamic torque of medium speed diesel engine axis in the high duty diesel generator set system.  ... 
doi:10.3303/cet1021169 doaj:118b665fc2df47ce801bb9449bd9c127 fatcat:mtgcemjl55g7jkot7f3rj3xoam

RemoteEye: An open-source high-speed remote eye tracker : Implementation insights of a pupil- and glint-detection algorithm for high-speed remote eye tracking

Benedikt Hosp, Shahram Eivazi, Maximilian Maurer, Wolfgang Fuhl, David Geisler, Enkelejda Kasneci
2020 Behavior Research Methods  
Existing low-cost solutions however, focus solely on lower frame rates (up to 120 Hz) that might suffice for basic eye tracking, leaving a gap when it comes to the investigation of high-speed saccadic  ...  This includes methods to effectively and robustly detect and track glints and pupils in the context of high-speed remote eye tracking, which, paired with a geometric eye model, achieved an average gaze  ...  To the knowledge of the authors, this is the first time such a high-speed real-time remote eye-tracking system with low data loss is offered.  ... 
doi:10.3758/s13428-019-01305-2 pmid:32212086 fatcat:gpuid2k3azhxljxbgklmr3avmy
« Previous Showing results 1 — 15 out of 71,860 results