Results 41 to 50 of about 887 (132)
RESEARCH OF BOUNDARIES OF A FREQUENCY MULTIPLEXING OF N-OFDM SIGNALS ON THE BASIC OF THE HARTLEY TRANSFORM WITH DIFFERENT MODULATION FORMATS OF THE FREQUENCY CARRIERS [PDF]
, 2012 В статье рассмотрены особенности формирования сигналов N-OFDM на основе преобразования Хартли с различными видами модуляции частотных несущих. Проведен анализ результатов исследований границ частотного уплотнения сигналов N-OFDM на основе преобразования ...
K.A. Vasilyev +2 more
core
Identity‐Enabled CDMA LiDAR for Massively Parallel Ranging with a Single‐Element Receiver
Laser &Photonics Reviews, Volume 19, Issue 23, December 3, 2025.A novel LiDAR system integrates CDMA modulation with a single‐element detector to achieve massive channel parallel 3D imaging. By using a user identification code and a correlation‐based feedback loop, it overcomes signal collisions and the near‐far problem.
Yixiu Shen, Zi Heng Lim, Guangya Zhou
wiley +1 more source
A new method of vibration analysis for the diagnosis of impeller in a centrifugal pump [PDF]
, 2014 Centrifugal pumps are widely used in many important industries such as power generation plants, chemical processes and petroleum refiners. The condition monitoring of centrifugal pumps is highly regarded by many researchers and users to minimize ...
Chen, Zhi +5 more
core
Performance Improvement of Multi-UserMC-CDMA system Using Discrete Hartly Transform Mapper [PDF]
, 2013 Future wireless communication systems must be able to accommodate a large number of users and simultaneously to provide the high data rates at the required quality of service. In this paper a method is proposed to perform the N-Discrete Hartley Transform
Ali T. Shaheen
core +1 more source
Nonlinear Electron Interactions With Intense VLF Waves From Transmitters
Journal of Geophysical Research: Space Physics, Volume 130, Issue 12, December 2025.Abstract The impact on electron lifetimes of nonlinear interactions with the most intense very low frequency (VLF) waves from transmitters has hitherto been neglected in radiation belt codes. Here, we show the presence of a small population of intense wave packets, originating from ground‐based VLF transmitters and reaching 10 mV/m around the magnetic ...
Didier Mourenas +5 more
wiley +1 more source
Imaging the Shallow Structure Beneath Askja Volcano, Iceland, With Ambient Noise Tomography
Journal of Geophysical Research: Solid Earth, Volume 130, Issue 12, December 2025.Abstract Askja is a large central volcano in the Northern Volcanic Zone (NVZ) of Iceland which last erupted effusively in 1961 and subsequently experienced steady deflation from the 1970s until August 2021, when GPS and InSAR measurements confirmed that it had begun re‐inflating.
Joseph Fone +5 more
wiley +1 more source
PAPR reduction for FBMC/OQAM using hybrid scheme of different Precoding transform and mu-law companding [PDF]
, 2017 The filter banks multicarrier with offset quadrature amplitude modulation (FBMC/OQAM) is developing multicarrier modulation technique used in the next wireless communication system (5G).
Reem Ibrahim +3 more
core +1 more source
Fennel Tea Has a Region‐Specific Effect on the Motility of the Stomach
Neurogastroenterology &Motility, Volume 37, Issue 12, December 2025.Fennel tea has a region‐specific effect on the stomach motility. It relaxes the fundus and the corpus and acts pro‐motility in the antrum. The store operated Ca2+ entry blocker SKF‐96365 hampers the spasmolytic effect of fennel tea in the fundus and corpus. The image was created using Biorender.
Anita Annahazi +5 more
wiley +1 more source
Azobenzenes and dithiocarbamates in molecular film devices [PDF]
, 2012 The “top-down” approach to improve the performance of small electronic devices is becoming more and more challenging due to economic and engineering restrictions. Thus, researchers seek for alternatives towards efficient, smaller and faster devices. The “
Reinders, Federica
core +1 more source
Functional Ecology, Volume 39, Issue 10, Page 2573-2587, October 2025.Read the free Plain Language Summary for this article on the Journal blog. Abstract The light climate at high latitudes, in particular the extended twilight of winter and the reduced diel variation in light level in midsummer and midwinter, potentially constrains visual function and the synchronisation of temporal organisation in polar species. In this
Nicholas J. C. Tyler +3 more
wiley +1 more source