Application of the divisor method to multiple peak DLTS spectra

1989 ◽  
Vol 18 (6) ◽  
pp. 763-766 ◽  
Author(s):  
Peter D. Devries ◽  
A. Azim Khan
1984 ◽  
Vol 56 (2) ◽  
pp. 217-221 ◽  
Author(s):  
S. A. Cohen ◽  
K. P. Benedek ◽  
Shannian. Dong ◽  
Yitzhak. Tapuhi ◽  
B. L. Karger

2016 ◽  
Vol 2 (2) ◽  
pp. 48-50
Author(s):  
Nikolai A. Poklonski ◽  
Nikolay I. Gorbachuk ◽  
Sergey V. Shpakovski ◽  
Viktor A. Filipenia ◽  
Arkady S. Turtsevich ◽  
...  
Keyword(s):  

2011 ◽  
Vol 23 (11) ◽  
pp. 2868-2914 ◽  
Author(s):  
Florian Raudies ◽  
Ennio Mingolla ◽  
Heiko Neumann

Motion transparency occurs when multiple coherent motions are perceived in one spatial location. Imagine, for instance, looking out of the window of a bus on a bright day, where the world outside the window is passing by and movements of passengers inside the bus are reflected in the window. The overlay of both motions at the window leads to motion transparency, which is challenging to process. Noisy and ambiguous motion signals can be reduced using a competition mechanism for all encoded motions in one spatial location. Such a competition, however, leads to the suppression of multiple peak responses that encode different motions, as only the strongest response tends to survive. As a solution, we suggest a local center-surround competition for population-encoded motion directions and speeds. Similar motions are supported, and dissimilar ones are separated, by representing them as multiple activations, which occurs in the case of motion transparency. Psychophysical findings, such as motion attraction and repulsion for motion transparency displays, can be explained by this local competition. Besides this local competition mechanism, we show that feedback signals improve the processing of motion transparency. A discrimination task for transparent versus opaque motion is simulated, where motion transparency is generated by superimposing large field motion patterns of either varying size or varying coherence of motion. The model’s perceptual thresholds with and without feedback are calculated. We demonstrate that initially weak peak responses can be enhanced and stabilized through modulatory feedback signals from higher stages of processing.


Author(s):  
Minghui Zheng ◽  
Masayoshi Tomizuka

Vibration with multiple large peaks at high frequencies may cause significant performance degradation and have become a major concern in modern high precision control systems. To deal with such high-frequency peaks, it is proposed to design a frequency-shaped sliding mode controller based on H∞ synthesis. It obtains an ‘optimal’ filter to shape the sliding surface, and thus provides frequency-dependent control allocation. The proposed frequency-shaping method assures the stability in the presence of multiple-peak vibration sources, and minimizes the weighted H∞ norm of the sliding surface dynamics. The evaluation is performed on a simulated hard disk drive with actual vibration sources from experiments, and the effectiveness of large vibration peak suppression is demonstrated.


Sensors ◽  
2015 ◽  
Vol 15 (4) ◽  
pp. 7454-7461 ◽  
Author(s):  
Heli Ma ◽  
Kun Song ◽  
Liang Zhou ◽  
Xiaopeng Zhao

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