Inexpensive digital correlator for spectrophotometric and other analytical measurements

1974 ◽  
Vol 46 (14) ◽  
pp. 2141-2150 ◽  
Author(s):  
T. A. Woodruff ◽  
H. V. Malmstadt
Keyword(s):  
Analytical Measurements ◽  
Digital Correlator

Analytical measurements in food examination

2020 ◽  
pp. 38-41
Author(s):  
Sergey Khurshudyan ◽  
E. Lazareva ◽  
Anastasia Ryabova ◽  
Yu. Mikhaylova
Keyword(s):  
Continuous Improvement ◽  
Historical Context ◽  
Food Products ◽  
Quality And Safety ◽  
Analytical Instruments ◽  
New Approaches ◽  
Analytical Measurements ◽  
Product Identification ◽  
Food Market ◽  
Domestic Food

The process of formation and continuous improvement of methods for assessing the quality and safety of food products using analytical instruments to expose the increasingly sophisticated falsification of food products in the domestic food market can be traced in the historical context. In this article, you can learn about new approaches to product identification.

Auto and Cross Correlation Measurements in a Turbine Cascade Using a Digital Correlator

1982 ◽  
Author(s):  
P. J. Bryanston-Cross ◽  
J. J. Camus
Keyword(s):  
Mach Number ◽  
High Speed ◽  
Cross Correlation ◽  
Turbine Blades ◽  
Image Plane ◽  
Strongly Correlated ◽  
Trailing Edge ◽  
Number Range ◽  
Cross Correlations ◽  
Digital Correlator

A simple technique has been developed which samples the dynamic image plane information of a schlieren system using a digital correlator. Measurements have been made in the passages and in the wakes of transonic turbine blades in a linear cascade. The wind tunnel runs continuously and has independently variable Reynolds and Mach number. As expected, strongly correlated vortices were found in the wake and trailing edge region at 50 KHz. Although these are strongly coherent we show that there is only limited cross-correlation from wake to wake over a Mach no. range M = 0.5 to 1.25 and variation of Reynolds number from 3 × 105 to 106. The trailing edge fluctuation cross correlations were extended both upstream and downstream and preliminary measurements indicate that this technique can be used to obtain information on wake velocity. The vortex frequency has also been measured over the same Mach number range for two different cascades. The results have been compared with high speed schlieren photographs.

A Systematic Quantification of the Sources of Variation of Process Analytical Measurements in the Steel Industry

2003 ◽  
Vol 15 (3) ◽  
pp. 391-402
Author(s):  
Renger H. Jellema ◽  
David J. Louwerse ◽  
Age K. Smilde ◽  
Mathieu J. P. Gerritsen ◽  
Daan Guldemond ◽  
...  
Keyword(s):  
Steel Industry ◽  
Analytical Measurements ◽  
Sources Of Variation
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