A New Hybrid CBL-CMOS Cell for Optimum Noise/Power Application

2003 ◽  
pp. 491-500
Author(s):  
Raúl Jiménez ◽  
Pilar Parra ◽  
Pedro Sanmartín ◽  
Antonio J. Acosta
Keyword(s):  
Noise Power ◽  
Power Application

Ultimate resolution and information in electron microscopy

1991 ◽  
Vol 49 ◽  
pp. 496-497
Author(s):  
D. Van Dyck
Keyword(s):  
Electron Microscopy ◽  
Electron Microscope ◽  
Transfer Function ◽  
Information Transfer ◽  
Communication Channel ◽  
Structural Information ◽  
Information Rate ◽  
Noise Power ◽  
Signal Power ◽  
Imaging Device

An (electron) microscope can be considered as a communication channel that transfers structural information between an object and an observer. In electron microscopy this information is carried by electrons. According to the theory of Shannon the maximal information rate (or capacity) of a communication channel is given by C = B log2 (1 + S/N) bits/sec., where B is the band width, and S and N the average signal power, respectively noise power at the output. We will now apply to study the information transfer in an electron microscope. For simplicity we will assume the object and the image to be onedimensional (the results can straightforwardly be generalized). An imaging device can be characterized by its transfer function, which describes the magnitude with which a spatial frequency g is transferred through the device, n is the noise. Usually, the resolution of the instrument ᑭ is defined from the cut-off 1/ᑭ beyond which no spadal information is transferred.

Analysis of photographic emulsions for High-Voltage Electron Microscopy

1993 ◽  
Vol 51 ◽  
pp. 452-453 ◽  
Author(s):  
James R. Kremer ◽  
Paul S. Furcinitti ◽  
Eileen O’Toole ◽  
J. Richard McIntosh
Keyword(s):  
Electron Microscope ◽  
Optical Density ◽  
High Voltage ◽  
Noise Power ◽  
Limited Information ◽  
Modulation Transfer ◽  
Transmission Microscopy ◽  
High Voltage Electron Microscopy ◽  
Voltage Range ◽  
Voltage Electron

Characteristics of electron microscope film emulsions, such as the speed, the modulation transfer function, and the exposure dependence of the noise power spectrum, have been studied for electron energies (80-100keV) used in conventional transmission microscopy. However, limited information is available for electron energies in the intermediate to high voltage range, 300-1000keV. Furthermore, emulsion characteristics, such as optical density versus exposure, for new or improved emulsions are usually only quoted by film manufacturers for 80keV electrons. The need for further film emulsion studies at higher voltages becomes apparent when searching for a film to record low dose images of radiation sensitive biological specimens in the frozen hydrated state. Here, we report the optical density, speed and relative resolution of a few of the more popular electron microscope films after exposure to 1MeV electrons.Three electron microscope films, Kodak S0-163, Kodak 4489, and Agfa Scientia 23D56 were tested with a JEOLJEM-1000 electron microscope operating at an accelerating voltage of 1000keV.

Speech Enhancement Based on Adaptive Noise Power Estimation Using Spectral Difference

2011 ◽  
Vol E94-A (10) ◽  
pp. 2031-2034 ◽  
Author(s):  
Jae-Hun CHOI ◽  
Joon-Hyuk CHANG ◽  
Dong Kook KIM ◽  
Suhyun KIM
Keyword(s):  
Speech Enhancement ◽  
Power Estimation ◽  
Noise Power ◽  
Spectral Difference ◽  
Adaptive Noise

Object Detection Using an Ideal Observer Model

2020 ◽  
Vol 2020 (16) ◽  
pp. 41-1-41-7
Author(s):  
Orit Skorka ◽  
Paul J. Kane
Keyword(s):  
Object Detection ◽  
Matched Filter ◽  
Image Sensors ◽  
Ideal Observer ◽  
Noise Power ◽  
Relative Evaluation ◽  
Detection And Identification ◽  
Cross Correlation Analysis ◽  
Observer Model ◽  
The Ideal

Many of the metrics developed for informational imaging are useful in automotive imaging, since many of the tasks – for example, object detection and identification – are similar. This work discusses sensor characterization parameters for the Ideal Observer SNR model, and elaborates on the noise power spectrum. It presents cross-correlation analysis results for matched-filter detection of a tribar pattern in sets of resolution target images that were captured with three image sensors over a range of illumination levels. Lastly, the work compares the crosscorrelation data to predictions made by the Ideal Observer Model and demonstrates good agreement between the two methods on relative evaluation of detection capabilities.

10 MWe Pressurized Water Reactor for Defense Terrestrial Power Application

1987 ◽  
Author(s):  
W. H. Arnold ◽  
M. C. Gross ◽  
W. S. Shingler ◽  
R. M. Vijuk
Keyword(s):  
Pressurized Water Reactor ◽  
Pressurized Water ◽  
Water Reactor ◽  
Power Application

Performance of Energy Detection Based on Estimated Noise Power in Cognitive Radio Networks

2011 ◽  
Vol 33 (6) ◽  
pp. 1487-1491 ◽  
Author(s):  
Yi-xian Liu ◽  
Fei Ji ◽  
Hua Yu
Keyword(s):  
Cognitive Radio ◽  
Cognitive Radio Networks ◽  
Energy Detection ◽  
Radio Networks ◽  
Noise Power

Evaluation of Pitting Corrosion in Duplex Stainless Steel Fe20Cr9ni for Nuclear Power Application

2020 ◽  
Author(s):  
Bin Yang ◽  
Yuefeng Chen ◽  
Yangtao Zhou ◽  
Yuan Wu ◽  
Huihui Zhu
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Pitting Corrosion ◽  
Nuclear Power ◽  
Power Application
Sign in / Sign up

Export Citation Format

Share Document