Open Access. Powered by Scholars. Published by Universities.®
- Keyword
-
- Accelerated life test (1)
- Accelerated life tests (1)
- Australia (1)
- Constant stress (1)
- Constant-stress accelerated life test (1)
-
- Control (1)
- Electronic equipment (1)
- Field cropsb - Diseases and pests (1)
- LSM (1)
- Least squares approximations (1)
- Organic light emitting diodes (OLED) (1)
- Organic light emitting diodes(OLEDs) (1)
- Parameter estimation (1)
- Plant identification (1)
- Precision agriculture (1)
- Real time (1)
- Reliability parameters (1)
- Testing (1)
- Weed control (1)
- Weeds (1)
- Weibull distribution (1)
- White OLED (1)
- White organic light emitting diodes (1)
- Publication Type
Articles 1 - 2 of 2
Full-Text Articles in Engineering
Constant-Stress Accelerated Life Test Of White Organic Light-Emitting Diode Based On Least Square Method Under Weibull Distribution, J Zhang, C Liu, G Cheng, X Chen, J Wu, Q Zhu, Laichang Zhang
Constant-Stress Accelerated Life Test Of White Organic Light-Emitting Diode Based On Least Square Method Under Weibull Distribution, J Zhang, C Liu, G Cheng, X Chen, J Wu, Q Zhu, Laichang Zhang
Research outputs 2014 to 2021
It is currently hard to estimate the reliability parameters of organic light-emitting diodes (OLEDs) when conducting a life test at normal stress, due to the remarkably improved life of OLEDs to thousands hours. This work adopted three constant-stress accelerated life tests (CSALTs) to predict the life of white OLEDs in a short time. The Weibull function was applied to describe the life distribution, and the shape and scale parameters were estimated using the least square method. The experimental test data were statistically analyzed using a self-developed software. The life of white OLEDs predicted via this software is in good agreement …
Development Of An Optical Sensor For Real-Time Weed Detection Using Laser Based Spectroscopy, Arie Jacobus Paap
Development Of An Optical Sensor For Real-Time Weed Detection Using Laser Based Spectroscopy, Arie Jacobus Paap
Theses: Doctorates and Masters
The management of weeds in agriculture is a time consuming and expensive activity, including in Australia where the predominant strategy is blanket spraying of herbicides. This approach wastes herbicide by applying it in areas where there are no weeds. Discrimination of different plant species can be performed based on the spectral reflectance of the leaves. This thesis describes the development of a sensor for automatic spot spraying of weeds within crop rows. The sensor records the relative intensity of reflected light in three narrow wavebands using lasers as an illumination source.
A prototype weed sensor which had been previously developed …