Results 31 to 40 of about 241,560 (260)
Ground loading of shallow tunnels under seismic scenario
Yantu gongcheng xuebao, 2020 Based on the calculation diagram specified by the current codes, the horizontal slice principle and the horizontal seismic coefficient are introduced to establish a general method for calculating the ground loading of shallow tunnels under seismic ...
LU Qin-wu , DENG Tao , GUAN Zhen-chang
doaj +1 more source
Research on nonlinear dynamic characteristics of high-speed gear in two-speed transmission system
Scientific Reports, 2023 The working performance and service life of the two-speed transmission system directly affects the performance and service life of helicopters and other equipment.
Wuzhong Tan +4 more
doaj +1 more source
Multivariable integrated evaluation of model performance with the vector field evaluation diagram [PDF]
Geoscientific Model Development, 2017 This paper develops a multivariable integrated evaluation (MVIE) method to measure the overall performance of climate model in simulating multiple fields.
Z. Xu, Y. Han, C. Fu, C. Fu
doaj +1 more source
Advances in Mechanical Engineering, 2020 In order to study the influence of tooth surface friction on the non-linear bifurcation characteristics of multi-clearance gear drive system, a 6 degree-of-freedom bending torsional coupled vibration model was established. The time-varying mesh stiffness,
Hao Dong, Jianwen Zhang, Libang Wang
doaj +1 more source
IEEE Access, 2019 Renewable energy sources (RESs) are growing rapidly and highly penetrated in microgrids (MGs). As a result of the replacement of the synchronous generators with a large amount of RESs, the overall system inertia might be dramatically reduced which ...
Hossam Ali +6 more
doaj +1 more source
MULTILOOP PI CONTROLLER FOR ACHIEVING SIMULTANEOUS TIME AND FREQUENCY DOMAIN SPECIFICATIONS [PDF]
Journal of Engineering Science and Technology, 2015 Most of the controllers in control system are designed to satisfy either time domain or frequency domain specifications. This work presents the computation of a multiloop PI controller for achieving time and frequency domain specifications simultaneously.
M. SENTHILKUMAR, S. ABRAHAM LINCON
doaj
The Influence of Switching Frequency on Control in Voltage Source Inverters
EnergiesThis paper aims to show how the switching frequency influences the properties of the digitally controlled voltage source inverter (VSI). The measurements of the Bode plots of the inverter are shown and discussed to present the existing signal delays and ...
Zbigniew Rymarski
doaj +1 more source
Automatika, 2023 In this paper, we introduce a Coefficient Diagram Method (CDM) to design a conventional PID controller. This controller is used to decrease the frequency fluctuations of a microgrid system composed of two renewable energy sources (WTG and STPG) and four ...
M’hamed Helaimi +3 more
doaj +1 more source
Coefficient Diagram Method Based Decentralized Controller for Fractional Order TITO Systems
Balkan Journal of Electrical and Computer Engineering, 2022 Fractional calculus has gained increasing attention from researchers because of providing accurate modelling and flexible controller design in control applications. More research to design controllers for Fractional Order Two-Input Two-Output (FOTITO) systems, which inherently have certain difficulties, is needed when the studies about these control ...
Furkan Nur DENİZ, Miray GÜNAY
openaire +2 more sources
Pediatric Blood &Cancer, EarlyView.ABSTRACT Background Secretory phospholipase A2 (sPLA2) is an inflammatory mediator linked to acute chest syndrome (ACS) in sickle cell disease (SCD), a serious complication that can develop during an acute vaso‐occlusive pain episode (VOE). Plasma sPLA2 levels have been proposed as a potential biomarker for predicting ACS onset.
Rawan Korman +10 more
wiley +1 more source