High Precision Synchronous Trigger be Researched Based on WSN

2014 ◽  
Vol 933 ◽  
pp. 578-583
Author(s):  
Dong Hong Zhang ◽  
De Qiong Wu ◽  
Shan Shan Sun ◽  
Zhi Fu Fang
Keyword(s):  
Shock Wave ◽  
Standard Deviation ◽  
Wave Field ◽  
Field Testing ◽  
Sensor Nodes ◽  
Testing System ◽  
Precision Measuring ◽  
Measuring Experiment ◽  
Testing Field ◽  
The Cost

The traditional synchronous trigger of blasting shock wave field is lineate. Because distributed range of testing field is very wide, the cost is high, disposing line is very inconvenient, reliability of testing system is at a discount. Now a more power node acts as synchronization trigger which starts up all sensor nodes isochronously by broadcast. The author named a synchronization technology as priority sequence. Single broadcast synchronization precision measuring experiment is made by the same testing method as Elson. The new experiment result is the error accord expectation , standard deviation normal school. The standard deviation is 6.8 of Elsons. The precision is exceed demand of shock wave field testing.

Ensemble estimation of polarization ellipse parameters

2007 ◽  
Vol 463 (2088) ◽  
pp. 3375-3394 ◽  
Author(s):  
A.T Walden ◽  
T Medkour
Keyword(s):  
Angular Distribution ◽  
Standard Deviation ◽  
Aspect Ratio ◽  
Plane Wave ◽  
Wave Field ◽  
Covariance Matrix ◽  
Time Instant ◽  
Azimuth Angle ◽  
Ensemble Estimation ◽  
Plane Wave Field

An ellipse describes the polarized part of a partially polarized quasi-monochromatic plane wave field. Its azimuth angle and aspect ratio are functions of the elements of the covariance matrix associated with the polarized part at a particular time instant. Given an ensemble of K independent samples at that time, the distributions of the estimators of these parameters are derived. The estimation is thus based on a sample ensemble at any time, and does not assume temporal stationarity. Additionally, the azimuth angle estimator has an angular distribution so that non-standard statistical methods are needed when deriving its mean and standard deviation.

Design and manufacture of a Nb/sub 3/Sn 16 T demountable insert solenoid for a high field testing system

2000 ◽  
Vol 10 (1) ◽  
pp. 458-461
Author(s):  
A. della Corte ◽  
R. Bruzzese ◽  
S. Chiarelli ◽  
M. Spadoni ◽  
V. Cavaliere ◽  
...  
Keyword(s):  
High Field ◽  
Field Testing ◽  
Testing System ◽  
Design And Manufacture

scholarly journals Development of Performance Evaluation Indicators for Table Grape Packaging Units

2021 ◽  
Vol 13 (4) ◽  
pp. 2177
Author(s):  
Edson Kogachi ◽  
Adonias Ferreira ◽  
Carlos Cavalcante ◽  
Marcelo Embiruçu
Keyword(s):  
Performance Evaluation ◽  
Standard Deviation ◽  
Process Management ◽  
Principal Component ◽  
Table Grape ◽  
Data Envelopment ◽  
Table Grapes ◽  
Speed Performance ◽  
The Cost

In order to improve the process management of table grape packaging, its performance should be evaluated. However, the literature on performance evaluation indicators is scarce. To address this research gap, we propose a method for the development of performance evaluation indicators for table grape packaging units, which are characterized by labor-intensive and highly seasonal production processes in the agro-economic sector. The stages include the following: contextualizing table grape packaging units, selecting the performance objectives, selecting techniques to be used in the development of the indicators, and applying the method to the packaging units of table grapes. The techniques adopted in the development of the indicators aimed at the cost, quality, flexibility, reliability, and speed performance objectives were data envelopment analysis, principal component analysis, quantification of the batch, compliance with the program within the established deadline, and measurement of the execution time of the batch, respectively. The results obtained in the case study demonstrate that the correlations between the performance indicators do not indicate the need to disregard any of them. Furthermore, the standard deviation values for each indicator are similar. Thus, both results of correlations and standard deviation confirm the importance of the indicators chosen for the performance evaluation of table grape packaging.

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