Results 41 to 50 of about 5,225 (215)

On Spatial Point Processes With Composition‐Valued Marks

International Statistical Review, EarlyView.
Summary Methods for marked spatial point processes with scalar marks have seen extensive development in recent years. While the impressive progress in data collection and storage capacities has yielded an immense increase in spatial point process data with highly challenging non‐scalar marks, methods for their analysis are not equally well developed ...
Matthias Eckardt, Mari Myllymäki, Sonja Greven   +2 more
wiley   +1 more source

Design of cooling structure improvement of hybrid commutated converter valve

High Voltage
This paper presents a thermal management framework for 120 kV hybrid commutated converter (HCC) valves, addressing critical cooling challenges in multi‐hundred‐MW power conversion systems.
Xu He, Lu Qu, Xiaoguang Wei, Fang Cai, Zhanqing Yu, Tianhui Yang, Yurong Luo, Gongyi Zhang   +7 more
doaj   +1 more source

Research on the characteristics of multi-infeed DC system with hybrid commutation converter suppressing successive commutation failure

International Journal of Electrical Power & Energy Systems
In view of the problem of successive commutation failure in multi-infeed direct current systems, this paper investigates the commutation characteristics of hybrid commutation convert technology and its application in mitigating successive commutation ...
Jian Cui, Zhichang Yuan, Kangsheng Cui, Long Zhang, Pengbo Zhao, Zhanqing Yu, Xiaoguang Wei, Xuejiao Han   +7 more
doaj   +1 more source

Experimental evaluation of hybrid cycloconverters [PDF]

, 2009
Power converters consisting of naturally commutated thyristors such as cycloconverters and current source inverters were the first used in driving electrical motors with variable speed but now due to their inferior performance compared to forced ...
Clare, Jon C., Klumpner, Christian, Xu, Tianning   +2 more
core   +1 more source

The Mathematical History Behind the Granger–Johansen Representation Theorem

Oxford Bulletin of Economics and Statistics, EarlyView.
ABSTRACT When can a vector time series that is integrated once (i.e., becomes stationary after taking first differences) be described in error correction form? The answer to this is provided by the Granger–Johansen representation theorem. From a mathematical point of view, the theorem can be viewed as essentially a statement concerning the geometry of ...
Johannes M. Schumacher
wiley   +1 more source

A PWM current source-based DC transmission system for multiple wind turbine interfacing [PDF]

, 2014
A pulsewidth modulation (PWM) current source wind energy conversion system based on a parallel configuration for high voltage direct current application is proposed.
Ahmed, Khaled Hani, Williams, Barry W., Xia, Yuanye   +2 more
core   +1 more source

Degree theory for 4‐dimensional asymptotically conical gradient expanding solitons

Communications on Pure and Applied Mathematics, Volume 79, Issue 5, Page 1151-1298, May 2026.
Abstract We develop a new degree theory for 4‐dimensional, asymptotically conical gradient expanding solitons. Our theory implies the existence of gradient expanding solitons that are asymptotic to any given cone over S3$S^3$ with non‐negative scalar curvature. We also obtain a similar existence result for cones whose link is diffeomorphic to S3/Γ$S^3/\
Richard H. Bamler, Eric Chen
wiley   +1 more source

Comparative Analysis on Small-Signal Stability of Multi-Infeed VSC HVDC System With Different Reactive Power Control Strategies

IEEE Access, 2019
Voltage Source Converter based High Voltage Direct Current (VSC HVDC) technology is used more and more in modern power systems. Consequently, in the ac network, an increasing number of converters are appearing in mutual electrical proximity, thus forming
Goran Grdenic, Marko Delimar, Jef Beerten   +2 more
doaj   +1 more source

In-wheel axial-flux SRM drive for light electric vehicles [PDF]

, 2018
Revenues from global sales of light electric vehicles are expected to grow from $ 9.3 billion in 2017 to $ 23.9 billion in 2025. In order to boost this growth electric drives with better features and lower costs have to be developed.
Andrada Gascón, Pedro, Blanqué Molina, Balduino, Martínez Piera, Eusebio, Perat Benavides, Josep Ignasi, Sánchez López, José Antonio, Torrent Burgués, Marcel   +5 more
core  

Red Blood Cell Membrane Mechanics Using Discrete Exterior Calculus (DEC) and Optimization

International Journal for Numerical Methods in Biomedical Engineering, Volume 42, Issue 4, April 2026.
We present a novel DEC approach for calculating RBC shapes applicable to other cell types and membrane problems. We derive an energy minimization equation that can be solved semi‐implicitly, and a Lie derivative method to control node spacing. This novel work should aid computational modeling in many biological situations.
Keith C. Afas, Daniel Goldman
wiley   +1 more source