Results 91 to 100 of about 20,903 (229)

Photovoltaic Bypass Diode Fault Detection Using Artificial Neural Networks

open access: yesIEEE Transactions on Instrumentation and Measurement, 2023
Mahmoud Dhimish, Andy M. Tyrrell
openaire   +2 more sources

Bio‐Inspired Swarm Robotics Design for Mine Automation

open access: yesNatural Sciences, Volume 6, Issue 2, April 2026.
Ants demonstrate tandem running for cooperative haulage, and honeybees use memory‐based routes between hive and flowers. These behaviours inspire autonomous haulage robots in open‐pit mines to achieve efficient scan‐plan‐retrieve ore transport, replacing small haulage robots with large mining trucks.
Joven Tan   +2 more
wiley   +1 more source

Rectenna thermal model development [PDF]

open access: yes
Deploying rectennas in space requires adapting existing designs developed for terrestrial applications to the space environment. One of the major issues in doing so is to understand the thermal performance of existing designs in the space environment ...
Alden, Adrian   +2 more
core   +1 more source

Monostable multivibrator with complementary NOR gates Patent [PDF]

open access: yes, 1971
Monostable multivibrator for producing output pulse widths with positive feedback NOR ...
Oneill, R. W.
core   +1 more source

Solar array electrical performance assessment for Space Station Freedom [PDF]

open access: yes
Electrical power for Space Station Freedom will be generated by large Photovoltaic arrays with a beginning of life power requirement of 30.8 kW per array. The solar arrays will operate in a Low Earth Orbit (LEO) over a design life of fifteen years.
Brisco, Holly, Smith, Bryan K.
core   +1 more source

Programmable electronic synthesized capacitance [PDF]

open access: yes, 1987
A predetermined and variable synthesized capacitance which may be incorporated into the resonant portion of an electronic oscillator for the purpose of tuning the oscillator comprises a programmable operational amplifier circuit.
Kleinberg, Leonard L.
core   +1 more source

Versatile Digital GHz Phase Lock for External Cavity Diode Lasers

open access: yes, 2009
We present a versatile, inexpensive and simple optical phase lock for applications in atomic physics experiments. Thanks to all-digital phase detection and implementation of beat frequency pre-scaling, the apparatus requires no microwave-range reference ...
Appel, Jürgen   +2 more
core   +1 more source

Identification of early operational defects in photovoltaic modules: A case study of a 24.9 MWp solar PV system in Sumatra, Indonesia

open access: yesUnconventional Resources
This study investigates early operational defects in a 24.9 MWp solar PV system located in Sumatra, Indonesia, within its first two years of operation. The primary objective is to identify key issues affecting performance, reliability, and energy output.
Elieser Tarigan
doaj   +1 more source

Photovoltaic stand-alone modular systems, phase 2 [PDF]

open access: yes
The final hardware and system qualification phase of a two part stand-alone photovoltaic (PV) system development is covered. The final design incorporated modular, power blocks capable of expanding incrementally from 320 watts to twenty kilowatts (PK ...
Marshall, N. A., Naff, G. J.
core   +1 more source

Radio-frequency impedance measurements using a tunnel-diode oscillator (TDO) technique

open access: yes, 1999
A resonant method based on a tunnel-diode oscillator (TDO) for precision measurements of relative impedance changes in materials, is described. The system consists of an effective self-resonant LC-tank circuit driven by a forward-biased tunnel diode ...
Rees, H., Srikanth, H., Wiggins, J.
core   +1 more source

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