Locally Optimum Detection of Composite Signals

2002 ◽  
pp. 123-183
Author(s):  
Iickho Song ◽  
Jinsoo Bae ◽  
Sun Yong Kim
Keyword(s):  
Optimum Detection

Robust Locally Optimum Detection.

1996 ◽  
Author(s):  
Donald R. Ucci ◽  
William E. Jacklin ◽  
Myron R. Mychal
Keyword(s):  
Optimum Detection

Alcohol Determination by HPLC with Postcolumn Derivatization Based on the Thiosulfate-catalyzed Reaction of Alcohols and Cerium(IV) and Fluorescence Detection of Cerium(III)

2020 ◽  
Vol 16 ◽  
Author(s):  
Ikko Mikami ◽  
Eri Shibayama ◽  
Kengo Takagi
Keyword(s):  
Detection Limit ◽  
Fluorescence Detection ◽  
Reaction Rate ◽  
Detection Method ◽  
Fluorescence Detector ◽  
Reaction Solution ◽  
Optimum Detection ◽  
Postcolumn Derivatization ◽  
Sensitive Method

Background: Determination of a reducing substance based on the reaction between Ce(IV) and a reducing substance and fluorescence detection of Ce(III) generated has been reported as a selective and sensitive method. However, this method could not be applied to the determination of alcohol due to the low reaction rate of alcohol and Ce(IV). Objective: We found that thiosulfate catalytically enhanced reaction of alcohols (such as, methanol, ethanol, and propanol) and Ce(IV). Utilizing this effect, we developed a new method for the determination of alcohols. Results: In the presence of thiosulfate, an increase in fluorescence intensity was detected by injecting alcohol at concentrations of several millimolar, whereas it was not observed even at the concentration of 10% v/v (2 M for ethanol) in the absence of thiosulfate. The optimum detection conditions were determined to be 4.0 mM Ce(IV) sulfate and 0.50 mM thiosulfate, and the detection limit (S/N = 3) of ethanol under these conditions was 1 mM. In the calibration curves, changes in the slope were observed when the alcohol concentrations were approximately 10–25 mM. Using a thiosulfate solution containing ethanol as the reaction solution, a calibration curve without any change in slope was obtained, although the concentration of ethanol at the detection limit increased. The alcohols in the liquor and fuel were successfully analyzed using the proposed detection method as a postcolumn reaction. Conclusion: This new alcohol detection method using a versatile fluorescence detector can be applied to the postcolumn reaction of HPLC omitting need of time-consuming pretreatment processes.

Full‐field optimum detection in an uncertain, anisotropic random wave scattering environment

1995 ◽  
Vol 98 (2) ◽  
pp. 1097-1110 ◽  
Author(s):  
V. Premus ◽  
D. Alexandrou ◽  
L. W. Nolte
Keyword(s):  
Wave Scattering ◽  
Random Wave ◽  
Full Field ◽  
Optimum Detection

Near-optimum detection scheme with relay selection technique for asynchronous cooperative relay networks

2014 ◽  
Vol 8 (8) ◽  
pp. 1347-1354 ◽  
Author(s):  
Walid Mohamed Qaja ◽  
Jonathon A. Chambers ◽  
Abdulghani M. Elazreg
Keyword(s):  
Relay Selection ◽  
Relay Networks ◽  
Cooperative Relay ◽  
Detection Scheme ◽  
Selection Technique ◽  
Cooperative Relay Networks ◽  
Optimum Detection

Magnetic starch microspheres in the MR imaging of hepatic metastases

1998 ◽  
Vol 39 (2) ◽  
pp. 161-166
Author(s):  
A. Sundin ◽  
C. Wang ◽  
A. Ericsson ◽  
A.-K. Fahlvik
Keyword(s):  
Mr Imaging ◽  
Detection Rate ◽  
Colonic Cancer ◽  
Spin Echo ◽  
Hepatic Metastases ◽  
Hepatic Veins ◽  
Optimum Detection ◽  
High Doses ◽  
Dose Levels ◽  
Experimental Liver

Purpose: to evaluate reticular endothelial system-specific magnetic starch microspheres (MSM) as an i.v. contrast agent for MR imaging in a model of experimental liver metastases Material and Methods: the study comprised 15 nude rats, 7 of which were carrying hepatic metastases from a human colonic cancer. the 15 rats were examined at 0.5 T using a T1-weighted spin-echo (SE) sequence and a gradientecho sequence. the examinations were performed before and 15 min after the administration of accumulated doses of MSM at 0.25–2.5 mg Fe/kg b.w. the images were compared with corresponding serial liver specimens Results: A loss of liver signal intensity was obtained at all MSM dose levels. No metastases were detected in the pre-contrast images. the optimum detection rate of hepatic metastases was reached with the SE sequence at a dose of 1.0 mg Fe/kg b.w. MSM and the diameters of the smallest lesions depicted were 1 mm. However, in the SE sequence, the measured lesion-to-liver contrast and liver signal damping were highest at the largest dose, indicating a possible image degrading effect of MSM at high doses. Administration of MSM as a short bolus over 30 s resulted in congestion of the liver with dilatation of the hepatic veins. When MSM was instead injected slowly over 5 min, this adverse effect was not seen Conclusion: the use of MSM dramatically increased the detection of experimental hepatic metastases

Comparison of methods for optimum detection of stressed and low levels of Listeria monocytogenes

1992 ◽  
Vol 9 (2) ◽  
pp. 127-145 ◽  
Author(s):  
Donald W. Warburton ◽  
Jeffrey M. Farber ◽  
Conrad Powell ◽  
Narayan P. Tiwari ◽  
Susan Read ◽  
...  
Keyword(s):  
Listeria Monocytogenes ◽  
Comparison Of Methods ◽  
Optimum Detection ◽  
Low Levels

Locally Optimum Detection of Known Signals

2002 ◽  
pp. 59-84
Author(s):  
Iickho Song ◽  
Jinsoo Bae ◽  
Sun Yong Kim
Keyword(s):  
Optimum Detection
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