Results 21 to 30 of about 62,455 (296)

SR-RRT: Selective Retraction-based RRT Planner

2012 IEEE International Conference on Robotics and Automation, 2012
We present a novel retraction-based planner, selective retraction-based RRT, for efficiently handling a wide variety of environments that have different characteristics. We first present bridge line-tests that can identify regions around narrow passages,
Zhang, Liangjun, Kwon, OSung, Lee, Junghwan, Yoon Sung-Eui   +3 more
core   +2 more sources

A Bidirectional-RRT*-Connect-Assisted RRT*-Smart for a path planning algorithm

Jurnal Ilmiah SINERGI
Although Rapidly Exploring Random Tree Star (RRT*) has been considered to be able to achieve convergence to an optimal solution, this method has a slow convergence speed and requires an infinite amount of time to produce a truly optimal solution.
Heru Suwoyo, Yudi Hastomi, Julpri Andika
doaj   +3 more sources

Bi-AM-RRT*: A Fast and Efficient Sampling-Based Motion Planning Algorithm in Dynamic Environments [PDF]

IEEE Transactions on Intelligent Vehicles, 2023
The efficiency of sampling-based motion planning brings wide application in autonomous mobile robots. The conventional rapidly exploring random tree (RRT) algorithm and its variants have gained significant successes, but there are still challenges for ...
Ying Zhang, Heyong Wang, Maoliang Yin, Jiankun Wang, C. Hua   +4 more
semanticscholar   +1 more source

Improved Bidirectional RRT* Algorithm for Robot Path Planning

Italian National Conference on Sensors, 2023
In order to address the shortcomings of the traditional bidirectional RRT* algorithm, such as its high degree of randomness, low search efficiency, and the many inflection points in the planned path, we institute improvements in the following directions.
Peng Xin, Xiaomin Wang, Xiaoli Liu, Yanhui Wang, Zhibo Zhai, Xiqin Ma   +5 more
semanticscholar   +1 more source

Diagnosis of the Coronavirus disease (COVID-19): rRT-PCR or CT?

European Journal of Radiology, 2020
Highlights • The COVID-19 outbreak highlights the need for early diagnosis, isolation and treatment• The sensitivity of the CT was 97.2%, while the sensitivity of initial rRT-PCR was 83.3%.• Patients with typical CT findings but negative rRT-PCR results ...
Chun-qin Long, Huaxiang Xu, Qinglin Shen, Xiang-jie Zhang, Bing Fan, Chuanhong Wang, Bingliang Zeng, Zicong Li, Xiaofen Li, Honglu Li   +9 more
semanticscholar   +1 more source

Diagnostic and prognostic performance of urinary neutrophil gelatinase‐associated lipocalin in patients with cirrhosis and acute kidney injury

Hepatology, EarlyView., 2022
Diagnostic and prognostic ability of urinary NGAL in patients with cirrhosis and AKI. Abstract Background and Aims Acute kidney injury (AKI) commonly occurs in patients with decompensated cirrhosis. Urinary neutrophil gelatinase–associated lipocalin (uNGAL) could help discriminate between different etiologies of AKI.
Carmine Gambino, Salvatore Piano, Matteo Stenico, Marta Tonon, Alessandra Brocca, Valeria Calvino, Simone Incicco, Nicola Zeni, Roberta Gagliardi, Chiara Cosma, Martina Zaninotto, Patrizia Burra, Umberto Cillo, Daniela Basso, Paolo Angeli   +14 more
wiley   +1 more source

Factors associated with cardiovascular events after simultaneous liver–kidney transplant from the US Multicenter Simultaneous Liver–Kidney Transplant Consortium

Hepatology Communications, EarlyView., 2022
Abstract Cardiovascular disease is a leading complication after both liver and kidney transplantation. Factors associated with and rates of cardiovascular events (CVEs) after simultaneous liver–kidney transplant (SLKT) are unknown. This was a retrospective cohort study of adult SLKT recipients between 2002 and 2017 at six centers in six United Network ...
Jennifer Jo, Gonzalo Crespo, Dyanna Gregory, Jasmine Sinha, Jiaheng Xie, Min Zhang, John Magee, Pranab Barman, Yuval A. Patel, Aaron Schluger, Kara Walters, Scott Biggins, Natalia Filipek, Giuseppe Cullaro, Randi Wong, Jennifer C. Lai, Gabriel J. Perreault, Elizabeth C. Verna, Pratima Sharma, Lisa B. VanWagner   +19 more
wiley   +1 more source

HPO-RRT*: a sampling-based algorithm for UAV real-time path planning in a dynamic environment

Complex & Intelligent Systems, 2023
The real-time path planning of unmanned aerial vehicles (UAVs) in dynamic environments with moving threats is a difficult problem. To solve this problem, this paper proposes a time-based rapidly exploring random tree (time-based RRT*) algorithm, called ...
Yicong Guo, Xiaoxiong Liu, Qianlei Jia, Xuhang Liu, Weiguo Zhang   +4 more
semanticscholar   +1 more source

UAV Trajectory Planning for Complex Open Storage Environments Based on an Improved RRT Algorithm

IEEE Access, 2023
Multi-rotor UAVs (Unmanned Aerial Vehicles) have been increasingly used for hazardous inspection tasks in complex open-air warehouse storage environments due to their high maneuverability and aerial perspective.
Jingcheng Zhang, Yuqiang An, Jianing Cao, Shibo Ouyang, Lei Wang   +4 more
semanticscholar   +1 more source

ST-RRT*: Asymptotically-Optimal Bidirectional Motion Planning through Space-Time [PDF]

IEEE International Conference on Robotics and Automation, 2022
We present a motion planner for planning through space-time with dynamic obstacles, velocity constraints, and unknown arrival time. Our algorithm, Space-Time RRT*(ST-RRT*), is a probabilistically complete, bidirectional motion planning algorithm, which ...
Francesco Grothe, Valentin N. Hartmann, A. Orthey, Marc Toussaint   +3 more
semanticscholar   +1 more source