Results 71 to 80 of about 5,900 (211)

Tight Fusion of a Monocular Camera, MEMS-IMU, and Single-Frequency Multi-GNSS RTK for Precise Navigation in GNSS-Challenged Environments

Remote Sensing, 2019
Precise position, velocity, and attitude is essential for self-driving cars and unmanned aerial vehicles (UAVs). The integration of global navigation satellite system (GNSS) real-time kinematics (RTK) and inertial measurement units (IMUs) is able to ...
Tuan Li, Hongping Zhang, Zhouzheng Gao, Xiaoji Niu, Naser El-sheimy   +4 more
doaj   +1 more source

Dynamically configurable architectures for multi-GNSS receiver

, 2017
This dissertation has focused on the development of dynamically configurable and programmable architectures for multi-GNSS receivers. The effect of RF front-end architecture and new characteristics of GNSS signals (modulation type, primary code generation, secondary code, required bandwidth and sampling frequency) on the complexity of the baseband ...
openaire   +2 more sources

Managing the Threat of Subsidized Predators for a Threatened Shorebird

Animal Conservation, EarlyView.
Subsidized predators—native predators that have become more common due to human activities—challenge the persistence of many at‐risk prey species and require creative solutions beyond lethal predator control. In an 8‐year study, we placed small wire cages over western snowy plover nests that allow passage of plovers, but not their predators, and ...
R. R. Swaisgood, R. L. Smith, J. G. Schuetz, T. Wooten, L. I. Vilchis   +4 more
wiley   +1 more source

Straddle carrier routing optimization at container terminals utilizing telemetry‐based prediction

International Transactions in Operational Research, EarlyView.
Abstract Efficient vehicle routing and scheduling for horizontal transport means on container terminals can reduce lead times and travel distances, resulting in fuel savings and productivity gains. We apply machine learning to emulate operational processes, bridging the gap between theoretical optimization models and real‐world practices at container ...
Julian Neugebauer, Ahmet Cürebal, Leonard Heilig, Stefan Voß   +3 more
wiley   +1 more source

PPP and PPP-AR Kinematic Post-Processed Performance of GPS-Only, Galileo-Only and Multi-GNSS

Remote Sensing, 2019
Precise point positioning (PPP) has been used for decades not only for general positioning needs but also for geodetic and other scientific applications.
Georgia Katsigianni, Sylvain Loyer, Felix Perosanz   +2 more
doaj   +1 more source

Multitrophic responses to tidal marsh restoration: early effects of channel configuration on water quality, aquatic food web structure, and fish communities

Restoration Ecology, EarlyView.
Abstract Introduction Tidal wetland restoration is critical for reversing habitat loss and enhancing resilience under sea‐level rise and climate variability. Dutch Slough in the San Francisco Estuary served as a living laboratory for adaptive management.
Joseph E. Merz, Cheryl Dean, Bobbie Flores, Katie Karpenko, Kai Ross, Andrew Veary   +5 more
wiley   +1 more source

Differential growth dynamics of common salt marsh species Spartina alterniflora and Juncus roemerianus under varied sediment amendments

Restoration Ecology, EarlyView.
Abstract Introduction Many coastal wetlands are at high risk of degradation or loss due to sea‐level rise. Restoration techniques for maintaining coastal marshes are paramount, with thin‐layer placement (TLP) emerging as one feasible solution. Despite TLP's utilization, additional research is needed on species‐ and sediment‐specific responses ...
Caitlin Hemphill, Richard P. Hale, Erik S. Yando   +2 more
wiley   +1 more source

Improving the performance of precise point positioning with multi-GNSS

, 2017
Hassas Nokta Konumlama (PPP), yalnızca bir alıcı kullanarak statik modda santimetre seviyesinde doğruluk sağlayabilen konum belirleme tekniğidir. Ancak, optimum sonuca ulaşmak için gereken uzun başlangıç süresi hala PPP'nin en büyük kısıtıdır. Son dönemlerde yeni navigasyon sistemlerinin ortaya çıkması bu kısıtın ortadan kaldırılması için iyi bir ...
openaire   +3 more sources

Multi‐year occupancy and habitat use in a threatened butterfly reintroduced onto a restored peatland

Restoration Ecology, EarlyView.
Abstract Introduction Over half of insect species reintroductions are unsuccessful, frequently because of insufficient habitat resources and a knowledge‐gap regarding the target species habitat requirements. Multi‐season occupancy models, seldom used with invertebrates, offer the opportunity to disentangle the effects of habitat suitability and ...
Andrew W. Osborne, Stuart Marsden, Sarah M. Griffiths, Simon J. M. Caporn, Emma Coulthard   +4 more
wiley   +1 more source

Assessment of Affordable Real-Time PPP Solutions for Transportation Applications

Algorithms
With the availability of multi-frequency, multi-constellation global navigation satellite system (GNSS) modules, precise transportation applications have become attainable.
Mohamed Abdelazeem, Amgad Abazeed, Abdulmajeed Alsultan, Amr M. Wahaballa   +3 more
doaj   +1 more source