Results 51 to 60 of about 5,208,008 (157)

δ-Hollow Modules

Ibn Al-Haitham Journal for Pure and Applied Sciences, 2017
    Let R be a commutative ring with unity and M be a non zero unitary left R-module. M is called a hollow module if every proper submodule N of M is small (N ≪ M), i.e. N + W ≠ M for every proper submodule W in M.
Inaam M. A. Hadi, Sameeah Hasoon Aidi
doaj  

Detecting Plateau Zokor (Eospalax baileyi) Mounds in UAV Imagery of Alpine Meadows Using Deep Learning Algorithms

Remote Sensing in Ecology and Conservation, EarlyView.
We developed PZM‐YOLO to automatically detect plateau zokor mounds in UAV imagery of alpine meadows. The model achieved reliable detection of small and densely distributed mounds under complex backgrounds, outperforming the baseline YOLOv5s. This framework supports mound counting, mound position, rodent impact assessment, and grassland restoration ...
Yang Yang, Limin Hua, Lianguo Wang, Jiazhen Li, Rui Dong, Siwei Yang   +5 more
wiley   +1 more source

A modular multilevel DC‐DC converter with self‐energy equalization for DC grids

IET Renewable Power Generation, 2021
Medium‐/High Voltage DC grids are interesting for the integration of renewable energy sources. DC‐DC conversion systems are highly needed for the development of DC grids.
Ahmed Elserougi, Ibrahim Abdelsalam, Ahmed Massoud, Shehab Ahmed   +3 more
doaj   +1 more source

Designing for unanticipated uses: How product attributes shape community‐led exaptation

Strategic Management Journal, EarlyView.
Abstract Research Summary Users often discover new uses for products that firms may later commercialize, which we call community‐led exaptation. We examine how product attributes shape users' discovery of new functions versus new functionalities. Using 1925 IKEA product hacks, we find that modularity increases the likelihood of new functions.
Shi‐Ying Lim, Tian Heong Chan
wiley   +1 more source

Small Monoform Modules

Ibn Al-Haitham Journal for Pure and Applied Sciences, 2017
 Let R be a commutative ring with unity, let M be a left R-module. In this paper we introduce the concept small monoform module as a generalization of monoform module.
Inaam, M.A. Hadi, Hassan K. Marhun
doaj  

Harmonic suppression and fault ride‐through method of diode‐rectifier‐based hybrid high‐voltage direct current system for offshore wind farms integration

IET Generation, Transmission & Distribution, 2023
The diode‐rectifier (DR)‐based high‐voltage direct current (HVDC) transmission is regarded as a low‐cost alternative to the HVDC transmission for offshore wind farms (OWFs) integration.
Zixi Fang, Renxin Yang, Xu Cai, Xinchi Wei, Kunpeng Zha, Haotian Yu   +5 more
doaj   +1 more source

Integration of Refractive Microlenses on BP/MoS2 Photodiodes for Enhanced Infrared Photodetection

Small, EarlyView.
This study demonstrates the successful integration of black phosphorus/molybdenum disulfide infrared photodetectors with refractive microlenses to significantly enhance detection. The design achieves a 20‐fold photocurrent enhancement, enabling a room‐temperature detectivity of 1.83 × 109 cmHz1/2W−1, and demonstrates high‐resolution (1023 × 768) single‐
Varsha Ashwin Vedaraj, Daniel Fan, Jinyuan Chen, Seyed Saleh Mousavi Khaleghi, Luke Philpott, Yuchen Sun, Shifan Wang, Shi Tang, Robert Delaney, Alexander Corletto, Kenneth B. Crozier, James Bullock   +11 more
wiley   +1 more source

A Solution of Implicit Model of Series-Parallel Photovoltaic Arrays by Using Deterministic and Metaheuristic Global Optimization Algorithms

Energies, 2020
The implicit model of photovoltaic (PV) arrays in series-parallel (SP) configuration does not require the LambertW function, since it uses the single-diode model, to represent each submodule, and the implicit current-voltage relationship to construct ...
Luis Miguel Pérez Archila, Juan David Bastidas-Rodríguez, Rodrigo Correa, Luz Adriana Trejos Grisales, Daniel Gonzalez-Montoya   +4 more
doaj   +1 more source

Zero‐Current Switching Based Model Predictive Control of a Double‐Extended Overlapped Alternate Arm Converter Used in the VSC–HVDC System

High Voltage, EarlyView.
ABSTRACT The alternate arm converter (AAC) is one of the most efficient multilevel topologies based on voltage source converters (VSCs), which has recently gained attention in various applications, particularly in high voltage direct current (HVDC) systems.
Ehsan Akbari, Milad Samady Shadlu
wiley   +1 more source

g-Small Intersection Graph of a Module

مجلة بغداد للعلوم
Let  be a commutative ring with identity, and  be a left -module. The g-small intersection graph of non-trivial submodules of , indicated by , is a simple undirected graph whose vertices are in one-to-one correspondence with all non-trivial submodules ...
Ahmed H. Alwan
doaj   +1 more source