Results 91 to 100 of about 1,047,954 (200)

State-of-the-art oriented review of CIRCUS [PDF]

Mathematical procedures for CIRCUS, digital computer program which is based on built-in model library and is capable of time domain analysis of certain ...
Eskin, H. D., Stern, T. E.
core   +1 more source

Current Status of Research on Fault Diagnosis Using Machine Learning for Gear Transmission Systems

Machines
Gear transmission system fault diagnosis is crucial for the reliability and safety of industrial machinery. The combination of mathematical signal processing methods with deep learning technology has become a research hotspot in fault diagnosis. Firstly,
Xuezhong Fu, Yuanxin Fang, Yingqiang Xu, Haijun Xu, Guo Ma, Nanjiang Peng   +5 more
doaj   +1 more source

PV Cell Temperature Prediction Under Various Atmospheric Conditions

Energies
The present study analyses various mathematical models from the technical literature for calculating photovoltaic cell temperature, emphasizing wind velocity as a key parameter. Since cell temperature significantly affects photovoltaic module efficiency,
Iuliana Şoriga, Camelia Stanciu, Patricia Şişu, Iuliana Goga   +3 more
doaj   +1 more source

Robustness properties of discrete time regulators, LOG regulators and hybrid systems [PDF]

Robustness properites of sample-data LQ regulators are derived which show that these regulators have fundamentally inferior uncertainty tolerances when compared to their continuous-time counterparts.
Athans, M., Stein, G.
core   +1 more source

An Analysis of the 4th and 8th Grade Mathematics Textbooks by TIMSS Cognitive Domains

, 2022
The aim of this study is to analyze questions in the fourth and eighth grade textbooksby cognitive areas addressed within the framework of the TIMSS 2019 program. Theresearch was performed with document analysis, one of the qualitative researchmethods. The questions in textbooks were classified independently considering theTIMSS 2019 cognitive domains.
TAŞPINAR ŞENER, ZEHRA, KILIÇ BULUT, AHSEN SEDA   +1 more
openaire   +1 more source

Global stability boundary analysis and verification of aviation pressure servo-controlled actuator system

Scientific Reports
In this paper, the mathematical model of the aviation pressure servo valve controlled actuator system(APSVCAS) considering nonlinearity is established based on a jet pipe pressure servo valve in this article. And the dynamic characteristics and stability
Zhipeng Huang, Xinjie Li, Zeyu Cao, Chentian Ma, Yunhe Wang, Bin Yu, Guoliang Ma, Xiangdong Kong   +7 more
doaj   +1 more source

A modified sequence domain impedance definition and its equivalence to the dq-domain impedance definition for the stability analysis of AC power electronic systems

, 2016
Representations of AC power systems by frequency dependent impedance equivalents is an emerging technique in the dynamic analysis of power systems including power electronic converters.
Cai, Xu, Chen, Zhang, Molinas, Marta, Rygg, Atle   +3 more
core  

Stability Analysis of a Multi-Machine Parallel Microgrid Using a Time-Domain Method

Energies
Current microgrid research primarily focuses on radial topologies and their control strategies, while exploration of the time-domain dynamic behavior of closed-loop controlled microgrids remains relatively insufficient.
Boning Chang, Yifeng Ren
doaj   +1 more source

Mathematical analysis of planar crystals grown from vapor in bounded domains

, 2014
The quasi-static evolution of planar crystals grown from supersaturation or dilute solutions are studied. A crystal is assumed to be an m-gon at all time, but not necessarily convex, in a domain with smooth boundary. The equations are of Stefan type coupled with the Gibbs-Thomson relation. We show local in time existence of solutions.
openaire   +1 more source