73 hasil untuk "Pi Cheng"
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A Modified Phase-Locked Loop with Parameter Self-Tuning Used in the Sensorless Control of Permanent Magnet Synchronous Motors (PMSMs)
…commands is equally critical. To address this need, a zero-pole-free PI regulator is designed within the PLL module, enabling more accurate flux estimation. Additionally, a gradient-based self-tuning algorithm is employed to identify system parameters, particularly the stator inductance, enabling…
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Bike lanes’ impacts on bike sharing system usage: From citywide to road-specific exploration of bike trips
Bike lane construction, a promising sustainable transport strategy, has the potential to significantly increase ridership and reduce the reliance on private vehicles in cities. While many studies analyze citywide statistical trends, few explore the effects of different bike lanes and examine the…
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A New Approach to Field-Oriented Control That Substantially Improves the Efficiency of an Induction Motor with Speed Control
Accurate estimation of the rotor flux angle remains a significant challenge when conventional direct or indirect field-oriented control (FOC) strategies are applied to induction motor drives. This paper proposes a novel method for determining the rotor flux angle under steady-state conditions using…
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Carbon reduction of plastic’s circular strategies: tracking the effects along supply chains with waste input–output modeling
Abstract Plastic is a material associated with various Greenhouse Gas (GHG) emissions along the life cycles of different products. Many economies have adopted or planned for strategies to reduce, reuse, and recycle plastic goods and materials. The benefits of reductions in waste generation and GHG…
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Glutamate-Evoked Ca(2+) Responses in the Rat Suprachiasmatic Nucleus: Involvement of Na(+)/K(+)-ATPase and Na(+)/Ca(2+)-Exchanger
Glutamate mediates photic entrainment of the central clock in the suprachiasmatic nucleus (SCN) by evoking intracellular Ca(2+) signaling mechanisms. However, the detailed mechanisms of glutamate-evoked Ca(2+) signals are not entirely clear. Here, we used a ratiometric Ca(2+) and Na(+) imaging…
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Ascorbic Acid-Initiated Tandem Radical Cyclization of N-Arylacrylamides to Give 3,3-Disubstituted Oxindoles
An ascorbic acid-promoted and metal-free tandem room temperature cyclization of N-arylacrylamides with 4-nitrobenzenediazonium generated in situ was developed. This reaction proceeds smoothly through a radical mechanism and provides an environmentally friendly alternative approach to biologically…
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Sinks as limited resources? A new indicator for evaluating anthropogenic material flows
Besides recyclables, the use of materials inevitably yields non-recyclable materials such as emissions and wastes for disposal. These flows must be directed to sinks in a way that no adverse effects arise for humans and the environment. The objective of this paper is to present a new indicator for…
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The Impact of Physical Education Classes on Health and Quality of Life during the COVID-19
The purpose of this study was to examine the effects of the COVID-19 pandemic on the well-being and the quality of life of college students participating in physical education classes. We consider this study to be relevant because during the COVID-19 pandemic we tested whether the boost in…
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Protective Application of Chinese Herbal Compounds and Formulae in Intestinal Inflammation in Humans and Animals
Intestinal inflammation is a chronic gastrointestinal disorder with uncertain pathophysiology and causation that has significantly impacted both the physical and mental health of both people and animals. An increasing body of research has demonstrated the critical role of cellular signaling…
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Biotransformation of Maclekarpine E in Rats: CYP2C19-Mediated Metabolism, Fecal Enrichment, and Network Pharmacology-Based Anti-Ulcerative Colitis Prediction
Maclekarpine E is a minor alkaloid from Macleaya species with reported in vitro anti-inflammatory activity, but its in vivo metabolism remains unexplored. This study investigated the metabolic fate of maclekarpine E in rats and evaluated the potential pharmacological relevance of its metabolites…
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Integrative analysis of 16S rRNA sequencing and network pharmacology suggests protective effects of Sihuang Zhili Granules against APEC O78 challenge through gut homeostasis-related changes
IntroductionAvian pathogenic Escherichia coli (APEC) infection poses a serious threat to the poultry industry and is increasingly difficult to control because of antimicrobial resistance.MethodsThis study combined microbiota analysis and network pharmacology to investigate the protective effects of…
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Role of Intracellular Na(+) in the Regulation of [Ca(2+)](i) in the Rat Suprachiasmatic Nucleus Neurons
Transmembrane Ca(2+) influx is essential to the proper functioning of the central clock in the suprachiasmatic nucleus (SCN). In the rat SCN neurons, the clearance of somatic Ca(2+) following depolarization-induced Ca(2+) transients involves Ca(2+) extrusion via Na(+)/Ca(2+) exchanger (NCX) and…
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NCOG-22. ELDER AGE INSTEAD OF LOW EDUCATION PREDICTS POOR LANGUAGE FUNCTION IN RECURRENT LEFT HEMISPHERIC DIFFUSE GLIOMA PATIENTS
PURPOSE: Language processing is multifactorial, requiring interactions between cognitive functions and connections of cerebral cortexes and subcortical fibers in dominant hemisphere. Previously, we identified distinct patient factors and tumor characters influencing language performance in…
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Structural study of monomeric and dimeric photosystem I-LHCI supercomplexes from a bryophyte
Photosystem I (PSI) is one of the two photosystems conserved from cyanobacteria to vascular plants, and associates with multiple light-harvesting complexes (LHCs) that capture and transfer solar energy. Liverworts such as Marchantia polymorpha occupy an early evolutionary position among land plants…
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Metal-Free Photoredox Catalyzed Cyclization of O-(2,4-Dinitrophenyl)oximes to Phenanthridines
A metal-free visible-light photoredox-catalyzed intermolecular cyclization reaction of O-2,4-dinitrophenyl oximes to phenanthridines was developed. In this study, the organic dye eosin Y and i-Pr2NEt were used as photocatalyst and terminal reductant, respectively. The oxime substrates were…
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Automatically Tightening Tiny Screw Using Two Images and Positioning Control
This paper describes how to tighten M1.4 screws by controlling a manipulator. The whole process is based on a human–machine interface designed using Visual Studio C++ to run image processing algorithms and control the position of a manipulator. Two charge-coupled device cameras are used. One is…
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Prediction of Kerf Width in Laser Cutting of Thin Non-Oriented Electrical Steel Sheets Using Convolutional Neural Network
Kerf width is one of the most important quality items in cutting of thin metallic sheets. The aim of this study was to develop a convolutional neural network (CNN) model for analysis and prediction of kerf width in laser cutting of thin non-oriented electrical steel sheets. Three input process…
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Linear Displacement Calibration System Integrated with a Novel Auto-Alignment Module for Optical Axes †
The quality of processed workpieces is affected directly by the precision of the linear stage. Therefore, the linear displacement calibration of machine tools must be implemented before delivery and after employment for a period of time. How to perform a precise calibration with high inspection…
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Trace Element Nanoparticles for Neurodegenerative Disease Therapy
Neurodegenerative diseases (NDDs) are closely linked to physiological conditions such as oxidative stress, neuroinflammation, neuronal cell death, and proteostatic failure, all of which are associated with cerebral trace-element imbalance. Recent research has highlighted the potential of…