scholarly journals A Nonautonomous Equation Discovery Method for Time Signal Classification

2022 ◽  
Vol 21 (1) ◽  
pp. 33-59
Author(s):  
Ryeongkyung Yoon ◽  
Harish S. Bhat ◽  
Braxton Osting
Keyword(s):  
Signal Classification ◽  
Time Signal ◽  
Nonautonomous Equation ◽  
Discovery Method

scholarly journals An Automatic Framework Using Space-Time Processing and TR-MUSIC for Subsurface and Through-Wall Multitarget Imaging

2012 ◽  
Vol 2012 ◽  
pp. 1-10 ◽  
Author(s):  
Si-hao Tan ◽  
Hui-lin Zhou ◽  
Lei Xiang ◽  
Zhen Shu
Keyword(s):  
Time Reversal ◽  
Electromagnetic Waves ◽  
Simulated Data ◽  
Space Time ◽  
Signal Classification ◽  
Time Signal ◽  
Inversion Algorithm ◽  
Direct Wave ◽  
Multiple Signal Classification ◽  
Time Processing

We present an automatic framework combined space-time signal processing with Time Reversal electromagnetic (EM) inversion for subsurface and through-wall multitarget imaging using electromagnetic waves. This framework is composed of a frequency-wavenumber (FK) filter to suppress direct wave and medium bounce, a FK migration algorithm to automatically estimate the number of targets and identify target regions, which can be used to reduce the computational complexity of the following imaging algorithm, and a EM inversion algorithm using Time Reversal Multiple Signal Classification (TR-MUSIC) to reconstruct hidden objects. The feasibility of the framework is demonstrated with simulated data generated by GPRMAX.

THE INFLUENCE OF INQUIRY AND DISCOVERY LEARNING METHOD AND CREATIVITY LEVEL IN WRITING SKILLS DESCRIPTION IN NAUTIC TARUNA AND TECHNIQUE IN SURABAYA SHIPPING POLYTECHNIC

2020 ◽  
Vol 8 (1) ◽  
Author(s):  
Ni Putu Dian Permata Prasetyaningrum
Keyword(s):  
Quantitative Methods ◽  
Writing Skills ◽  
Discovery Learning ◽  
Learning Method ◽  
Test Results ◽  
Learning Methods ◽  
Is Research ◽  
Investigation Methods ◽  
High Level ◽  
Discovery Method

Surabaya Shipping Polytechnic emphasizes on certain areas of expertise that Taruna must possess. This is the basis after graduating from shipping polytechnics, cadets must have expertise and skills. The purpose of this study was to study the effect of inquiry, discovery learning, and creativity levels on the ability to write descriptive essays on nautical and technical cadets at Surabaya Shipping Polytechnic. This type of research is research. This research uses quantitative methods using experiments. The location used in this research is Surabaya Shipping Polytechnic. The subjects in this study were the cadets of the Nautika A, Nautika B, Teknika A, and Teknika B. classes. Based on the results of the research and discussion, the following conclusions are obtained: There are those that can be solved looking for description essays in the cadets. learning discovery method. The test results show better investigation methods than the discovery of learning, There is a difference in the ability to write a description essay about cadets who have a high level of creativity with cadets who have a low level of creativity, the test results show better who have a high level of creativity, there are related with learning methods and descriptions of the ability to write essay descriptions, the test results show learning methods and creativity descriptions of the ability to write essay descriptions.

Electrical Probing and Surface Imaging of Deep Sub-Micron Integrated Circuits

1999 ◽  
Author(s):  
Kenneth Krieg ◽  
Richard Qi ◽  
Douglas Thomson ◽  
Greg Bridges
Keyword(s):  
High Resolution ◽  
Integrated Circuits ◽  
Real Time ◽  
High Speed ◽  
Time Signal ◽  
Surface Imaging ◽  
Atomic Force ◽  
Submicron Structures ◽  
High Resolution Images ◽  
Capacitive Loading

Abstract A contact probing system for surface imaging and real-time signal measurement of deep sub-micron integrated circuits is discussed. The probe fits on a standard probe-station and utilizes a conductive atomic force microscope tip to rapidly measure the surface topography and acquire real-time highfrequency signals from features as small as 0.18 micron. The micromachined probe structure minimizes parasitic coupling and the probe achieves a bandwidth greater than 3 GHz, with a capacitive loading of less than 120 fF. High-resolution images of submicron structures and waveforms acquired from high-speed devices are presented.

Active control of compressor noise in the machinery room of refrigerators

2019 ◽  
Vol 67 (5) ◽  
pp. 350-362
Author(s):  
J. M. Ku ◽  
W. B. Jeong ◽  
C. Hong
Keyword(s):  
Control System ◽  
Active Control ◽  
Weighting Function ◽  
Reference Signal ◽  
Active Noise Control ◽  
Dominant Frequency ◽  
Time Signal ◽  
Frequency Noise ◽  
Sound Power ◽  
Fxlms Algorithm

The low-frequency noise generated by the vibration of the compressor in the machinery room of refrigerators is considered as annoying sound. Active noise control is used to reduce this noise without any change in the design of the compressor in the machinery room. In configuring the control system, various signals are measured and analyzed to select the reference signal that best represents the compressor noise. As the space inside the machinery room is small, the size of a speaker is limited, and the magnitude of the controller transfer function is designed to be small at low frequencies, the controller uses FIR filter structure converged by the FxLMS algorithm using the pre-measured time signal. To manage the convergence speed for each frequency, the frequency-weighting function is applied to FxLMS algorithm. A series of measurements are performed to design the controller and to evaluate the control performance. After the control, the sound power transmitted by the refrigerator is reduced by 9 dB at the first dominant frequency (408 Hz in this case) and 3 dB at the second dominant frequency (459 Hz here), and the overall sound power decreases by 2.6 dB. Through this study, an active control system for the noise generated by refrigerator compressors is established.

Community Discovery Method in Networks Based on Topological Potential

2009 ◽  
Vol 20 (8) ◽  
pp. 2241-2254 ◽  
Author(s):  
Wen-Yan GAN ◽  
Nan HE ◽  
De-Yi LI ◽  
Jian-Min WANG
Keyword(s):  
Community Discovery ◽  
Discovery Method

Research on Real-Time Signal Processing of the Missile-Borne SAR

2011 ◽  
Vol 30 (4) ◽  
pp. 1010-1013
Author(s):  
Zhi-ming He ◽  
Jiang Zhu ◽  
Bo Zhou
Keyword(s):  
Signal Processing ◽  
Real Time ◽  
Time Signal ◽  
Real Time Signal Processing
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