Research on passive detection parameter measurement technology based on single vector sensor

2017 ◽  
Vol 142 (4) ◽  
pp. 2587-2587
Author(s):  
Juan Hui
Keyword(s):  
Parameter Measurement ◽  
Measurement Technology ◽  
Passive Detection ◽  
Vector Sensor

The research of passive detection parameter measurement based on vector sensor

2019 ◽  
Vol 145 (3) ◽  
pp. 1693-1693
Author(s):  
Juan Hui ◽  
Xianzhong Bu ◽  
Anbang Zhao ◽  
Dayu Wang ◽  
Jin Li
Keyword(s):  
Parameter Measurement ◽  
Passive Detection ◽  
Vector Sensor

scholarly journals Open-Lake Experimental Investigation of Azimuth Angle Estimation Using a Single Acoustic Vector Sensor

2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
Anbang Zhao ◽  
Lin Ma ◽  
Juan Hui ◽  
Caigao Zeng ◽  
Xuejie Bi
Keyword(s):  
Acoustic Pressure ◽  
Azimuth Angle ◽  
Estimation Methods ◽  
Acoustic Vector Sensor ◽  
Angle Estimation ◽  
Passive Detection ◽  
Vector Sensor ◽  
Sonar System ◽  
Multichannel Signals ◽  
Structure Sensor

Five well-known azimuth angle estimation methods using a single acoustic vector sensor (AVS) are investigated in open-lake experiments. A single AVS can measure both the acoustic pressure and acoustic particle velocity at a signal point in space and output multichannel signals. The azimuth angle of one source can be estimated by using a single AVS in a passive sonar system. Open-lake experiments are carried out to evaluate how these different techniques perform in estimating azimuth angle of a source. The AVS that was applied in these open-lake experiments is a two-dimensional accelerometer structure sensor. It consists of two identical uniaxial velocity sensors in orthogonal orientations, plus a pressure sensor—all in spatial collocation. These experimental results indicate that all these methods can effectively realize the azimuth angle estimation using only one AVS. The results presented in this paper reveal that AVS can be applied in a wider range of application in distributed underwater acoustic systems for passive detection, localization, classification, and so on.

scholarly journals Influence of different methods and anticoagulants on platelet parameter measurement

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Steffen Mannuß
Keyword(s):  
Lupus Erythematosus ◽  
Physiological Role ◽  
Parameter Measurement ◽  
Measurement Technology ◽  
Vascular Integrity ◽  
Coronary Syndrome ◽  
Antiplatelet Medication ◽  
Inflammatory Processes ◽  
Platelet Parameter

AbstractPlatelets are the smallest and perhaps the most versatile components of human blood. Besides their role in coagulation and the maintenance of vascular integrity, they are involved in many physiological processes, ranging from immune response and leukocyte recruitment to the production of antimicrobial peptides and immune-suppressive factors like TGF-β. These versatile abilities make platelets interesting for researchers from different disciplines. However, beside profound investigation into platelets’ physiological role, there is a need for correct, standardized and thus reproducible quantification of platelet parameters. Mean platelet volume (MPV) is a widespread prognostic marker for several conditions, such as, acute coronary syndrome, chronic kidney disease and liver cirrhosis. Platelet activation is regarded as a marker for inflammatory processes, for example in autoimmune diseases such as type-1 diabetes, systemic lupus erythematosus and rheumatoid arthritis. The monitoring of platelet function is relevant for patients receiving antiplatelet medication. Platelet parameter measurement is affected by the choice of in vitro anticoagulant, the measurement technology and the time delay after sampling. This review focuses on the pre-analytical variability that arises as a result of the use of different in vitro anticoagulants and analyzer technologies when determining platelet parameters, since, even approximately 180 years after the discovery of platelets, there is still no standardized procedure.

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