Results 21 to 30 of about 209,634 (164)
Soiling and other optical losses in solar-tracking PV plants in Navarra [PDF]
, 2011 Field data of soiling energy losses on PV plants are scarce. Furthermore, since dirt type and accumulation vary with the location characteristics (climate, surroundings, etc.), the available data on optical losses are, necessarily, site dependent.
Duffie +6 more
core +2 more sources
A multi‐level approach for multi‐objective optimization in process eco‐design
Environmental Progress &Sustainable Energy, EarlyView.Abstract This work addresses a central challenge in process eco‐design: how to efficiently integrate environmental and economic criteria—often conflicting—into early design stages while managing the high dimensionality of Life Cycle Assessment (LCA) indicators.
Luis Fernando Morales‐Mendoza +3 more
wiley +1 more source
A Verilog HDL digital architecture for delay calculation [PDF]
, 2007 A method for the calculation of the delay between two digital signals with central frequencies in the range [20, 300] Hz is presented. The method performs a delay calculation in order to determine the bearing angle of a sound source.
Chacón-Rodríguez, A. +3 more
core
VLSI implementation of an energy-aware wake-up detector for an acoustic surveillance sensor network [PDF]
, 2006 We present a low-power VLSI wake-up detector for a sensor network that uses acoustic signals to localize ground-base vehicles. The detection criterion is the degree of low-frequency periodicity in the acoustic signal, and the periodicity is computed from
Andreou, Andreas +5 more
core +1 more source
Optimal Gain Selection for the Arbitrary‐Order Homogeneous Differentiator
International Journal of Robust and Nonlinear Control, EarlyView.ABSTRACT Differentiation of noisy signals is a relevant and challenging task. Widespread approaches are the linear high‐gain observer acting as a differentiator and Levant's robust exact differentiator with a discontinuous right‐hand side. We consider the family of arbitrary‐order homogeneous differentiators, which includes these special cases.
Benjamin Calmbach +2 more
wiley +1 more source
3D-printed low-cost choke corrugated Gaussian profile horn antenna for Ka-band
Scientific Reports, 2023 In this work, a fully 3D-printed choke corrugated Gaussian profile horn antenna (GPHA) using high-conductive filaments and a low-cost modular 3D-printing technique is implemented.
Yair D. Zárate +3 more
doaj +1 more source
Development of a state feedback controller for the synchronous buck converter [PDF]
, 2005 A digital control algorithm for a current-mode (CM) and a voltage-mode (VM) synchronous buck converter (SBC) is developed. In both cases, the design leads to a stable controller, even for a duty cycle larger than 50%.
Bortolotto, Gustavo +2 more
core
The First Archaeomagnetic Age at Tiwanaku and Implications for Dating Andean Metallurgical Furnaces
Archaeometry, EarlyView.ABSTRACT This paper presents the first archaeomagnetic dating at Tiwanaku (Andean Altiplano). We compared the geomagnetic field values recorded by a metallurgical furnace against an updated SHAWQ2k‐SH global model and a regional intensity curve, both of which include, for the first time, high‐quality intensity data from the Southern Hemisphere. Results
Judit del Río +6 more
wiley +1 more source
A Model for Induction Motors with Non-Uniform Air-Gap [PDF]
, 2005 Equations to calculate inductances of induction motors, considering non-uniform air-gap, are proposed. The analyzed air-gap variations are static and dynamic eccentricity and stator slots.
Bossio, Guillermo Rubén +4 more
core
Geophysical Research Letters, Volume 53, Issue 2, 28 January 2026.Abstract The MIST experiment aims to detect the cosmological 21‐cm signal through sky observations at 25–125 MHz using a wide‐beam antenna. The antenna is mounted above the soil and the beam characteristics are highly dependent on the soil's electrical properties.
I. Hendricksen +15 more
wiley +1 more source