Results 131 to 140 of about 21,371 (301)
Systèmes à commutation : recherche du mode actif, identification de la loi de commutation
, 2007 National audienceLes systèmes à commutation représentent une classe particulière de systèmes hybrides. Ils sont décrits par plusieurs modèles de fonctionnement et chaque modèle, définissant un mode du système, est actif sous certaines conditions ...
Ragot, José +2 more
core +1 more source
Journal of Applied Econometrics, EarlyView.ABSTRACT While existing work shows COVID‐19 stay‐at‐home (SAH) policies decreased mobility on average, we lack evidence regarding heterogeneity in policy effectiveness across US counties. To uncover potential heterogeneity, we implement a novel two‐stage approach.
James Sears +5 more
wiley +1 more source
, 2017 The mathematical model of the equivalent circuit of a brushless DC motor switches during the operation due to commutation. This issue causes a sudden ripple in the output torque, which is called commutation torque ripple. Brushless DC motor drives suffer
Ihsan Obayes Khudhair KHUDHAIR +3 more
core +1 more source
Journal of Dental Education, EarlyView.ABSTRACT Purpose/Objectives Class attendance has traditionally been viewed as essential for academic success and professional development, particularly in health professions education. However, evolving educational technologies and changing student demographics have sparked debate about the necessity of mandatory attendance policies, especially in the ...
Alice Chan +5 more
wiley +1 more source
Journal of Dental Education, EarlyView.ABSTRACT Objective This study investigated the perceived stressors and resilience factors among dental hygiene (DH) students in the United States (US) and Japan. Methods A cross‐sectional survey was administered to a convenience sample of DH students from two US DH programs and one DH program in Japan.
Michelle C. Arnett +6 more
wiley +1 more source
Layout of Laminated Bus Bar for Diode Neutral Point Clamped Three-level Inverter
Kongzhi Yu Xinxi Jishu, 2014 Based on the design requirements of low inductance for diode neutral point clamped(NPC) inverter, it analyzed forced commutation operation modes of the inverter’s main circuit, described a layout theory of low inductance laminated bus bar and presented 3
doaj
Measuring System for Duration Time of Commutation Spark and Application to the Study of Commutation Spark Number [PDF]
, 1985 application/pdfWe have developed measuring system for arc duration time of commutation spark, which is fabricated to evaluate a commutation action of D-C machine quantitavely.
SUZUKI, Yoshio +8 more
core
Line Graphs of Multigraphs and the Forbidden Graph E 6
Journal of Graph Theory, EarlyView.ABSTRACT The line graph Γ of a multigraph Δ is the graph whose vertices are the edges of Δ, where two such edges are adjacent if and only if they meet in a single vertex of Δ. We provide several characterizations of such line graphs and in particular show that a graph is a line graph if and only if it does not contain one of the 32 graphs, all of which
Hans Cuypers
wiley +1 more source
Commutation in the Cracow voivodeship
, 1962 An analysis of centres of non-agricultural work attracting most of the labour surplus from the rural environment is the starting point for research on correlations between the countryside and the town.
Herma, Jadwiga
core +1 more source
Trends in hospitalizations for vaccine‐preventable diseases in the United States from 2014 to 2024
Journal of Hospital Medicine, EarlyView.Abstract Background and Objectives Vaccination rates have declined in recent years, resulting in outbreaks of vaccine‐preventable diseases (VPDs) among children. We aimed to evaluate VPD hospitalization rates from 2014 to 2024 and to report associated trends in outcomes including intensive care utilization, mortality, readmissions, and costs.
Nathan M. Money +5 more
wiley +1 more source