Results 31 to 40 of about 202,245 (252)

Performance of BDS B1 frequency standard point positioning during the main phase of different classes of geomagnetic storms in China and its surrounding area [PDF]

, 2021
Abstract. Geomagnetic storms are one of the space weather events. The radio signals transmitted by modern navigation systems suffer from the effects of storms which can degrade the performance of the whole system. In this study, the performance of BeiDou Navigation Satellite System (BDS) B1 frequency standard point positioning in China and its ...
Junchen Xue, Sreeja Vadakke Veettil, Marcio Aquino, Xiaogong Hu, Lin Quan, Dun Liu   +5 more
openaire   +2 more sources

Study on Circle Center Positioning Error by Fitting of Measurement System for Gear Chamfering

MATEC Web of Conferences, 2016
This paper briefly introduced the working principle of non-contact measurement system of gear chamfering based on computer vision technology and laser range-finding technology.
Zhang chi, Xu Zengpu, Liu Guohao, Wang Yongqiang, Zhou Congling   +4 more
doaj   +1 more source

Three dimensional patient-specific guides for guide pin positioning in reverse shoulder arthroplasty: An experimental study on different glenoid types

Journal of Orthopaedic Surgery, 2022
Introduction Incorrect positioning is one of the main factors for glenoid component loosening in reverse shoulder arthroplasty and component placement can be challenging.
Majid Mohammad Sadeghi PhD, Emin Faruk Kececi PhD, Mehmet Kapicioglu MD, Ayse Aralasmak MD, Okan Tezgel MD, Murat Alper Basaran PhD, Fatih Yildiz, Kerem Bilsel MD   +7 more
doaj   +1 more source

Underground personnel positioning algorithm based on clustering and K-nearest neighbor algorithm

Gong-kuang zidonghua, 2019
In view of problems of large amount of calculation, low real-time performance and low positioning accuracy of existing fingerprint-based underground positioning algorithm, underground personnel positioning algorithm based on clustering and K-nearest ...
MO Shupei, TANG Jin, WANG Yu, LAI Pujian, JIN Limo   +4 more
doaj   +1 more source

Autonomous Identification and Positioning of Trucks during Collaborative Forage Harvesting

Sensors, 2021
In the process of collaborative operation, the unloading automation of the forage harvester is of great significance to improve harvesting efficiency and reduce labor intensity.
Wei Zhang, Liang Gong, Suyue Chen, Wenjie Wang, Zhonghua Miao, Chengliang Liu   +5 more
doaj   +1 more source

A Two-Step Fusion Method of Wi-Fi FTM for Indoor Positioning

Sensors, 2022
The Wi-Fi fine time measurement (FTM) protocol specified in the IEEE 802.11-2016 standard provides a new two-way ranging approach to enhance positioning capability. Similar to other wireless signals, the accuracy of the real-time range measurement of FTM
Shenglei Xu, Yunjia Wang, Minghao Si
doaj   +1 more source

The CNES Solutions for Improving the Positioning Accuracy with Post-Processed Phase Biases, a Snapshot Mode, and High-Frequency Doppler Measurements Embedded in Recent Advances of the PPP-WIZARD Demonstrator

Remote Sensing, 2023
For many years, the navigation team at the French Space Agency (CNES) has been developing its Precise Point Positioning project. The goal was initially to promote a technique called undifferenced ambiguity resolution.
Clément Gazzino, Alexis Blot, Elodie Bernadotte, Théo Jayle, Marion Laymand, Nicolas Lelarge, Aude Lacabanne, Denis Laurichesse   +7 more
doaj   +1 more source

Carcinomas and Carcinoid Tumors of the Lungs and Bronchi in Children and Adolescents: The EXPeRT Recommendations

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Primary lung carcinomas and bronchial carcinoid tumors (BC) are very rare malignancies in childhood. While typical BC and mucoepidermoid carcinomas are mostly low‐grade, localized tumors with a more favorable prognosis than in adults, necessitating avoidance of overtreatment, adenocarcinomas of the lung are often diagnosed at advanced disease ...
Michael Abele, Calogero Virgone, Michaela Kuhlen, Sabine Irtan, Yves Reguerre, Malgorzata Krawczyk, Ewa Bien, Tal Ben‐Ami, Maja Cesen, Ricardo Lopez‐Almaraz, Andrea Ferrari, Gianni Bisogno, Dominik T. Schneider, Abbas Agaimy, Constantin Lapa, Hubert Ducou le Pointe, Rainer Claus, Catherine Daniel, Ines B. Brecht, Daniel Orbach   +19 more
wiley   +1 more source

A Nonlinear Controller for Point-to-Point Position Control

Energies, 2023
Position control algorithms can be classified into two groups: point-to-point control and continuous path control. For point-to-point control implemented in programmable logic controllers, the speed setpoint is mostly the only setpoint transmitted to the
Karol Kyslan, Pavol Smoleň, Viktor Šlapák, František Ďurovský   +3 more
doaj   +1 more source

European Standard Clinical Practice Guideline and EXPeRT Recommendations for the Diagnosis and Management of Gastroenteropancreatic Neuroendocrine Neoplasms in Children and Adolescents

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Pediatric gastroenteropancreatic neuroendocrine neoplasms (GEP‐NENs) are extremely rare and clinically heterogeneous. Management has largely been extrapolated from adult practice. This European Standard Clinical Practice Guideline (ESCP), developed by the EXPeRT network in collaboration with adult NEN experts, provides (adult) evidence ...
Michaela Kuhlen, Calogero Virgone, Antje Redlich, Michael Abele, Ricardo Lopez‐Almaraz, Tal Ben‐Ami, Ewa Bien, Gianni Bisogno, Maja Mazic Cesen, Andrea Ferrari, Malgorzata A. Krawczyk, Yves Reguerre, Dominik T. Schneider, Ines B. Brecht, Charlotte Rigaud, Bilgehan Yalcin, Rainer Claus, Christian Vokuhl, Constantin Lapa, Jörg Fuchs, Segolene Hescot, Thomas Walter, Julien Hadoux, Daniel Orbach   +23 more
wiley   +1 more source