Results 271 to 280 of about 1,468,959 (299)

Loop closure detection using CNN words

Intelligent Service Robotics, 2019
Loop closure detection (LCD) is crucial for the simultaneous localization and mapping system of an autonomous robot. Image features from a convolution neural network (CNN) have been widely used for LCD in recent years. Instead of directly using the feature vectors to compute the image similarity, we propose a novel and easy-to-implement method that ...
Qiang Liu, Fuhai Duan
openaire   +1 more source

Loop-Closure Detection With a Multiresolution Point Cloud Histogram Mode in Lidar Odometry and Mapping for Intelligent Vehicles

IEEE/ASME transactions on mechatronics, 2021
Precise positioning is the basic condition for intelligent vehicles to complete perception, decision making and control tasks. In response to this challenge, in this article, lidar simultaneous localization and mapping (SLAM) is taken as the research ...
Qingyu Meng, Hongyan Guo, Xiaoming Zhao, Dongpu Cao, Hong Chen   +4 more
semanticscholar   +1 more source

Hierarchical Loop Closure Detection for Long-term Visual SLAM with Semantic-Geometric Descriptors

International Conference on Intelligent Transportation Systems, 2021
Modern visual Simultaneous Localization and Mapping (SLAM) systems rely on loop closure detection methods for correcting drifts in maps and poses. Existing loop closure detection methods mainly employ conventional feature descriptors to create vocabulary
Gaurav Singh, Meiqing Wu, S. Lam, Doan Van Minh   +3 more
semanticscholar   +1 more source

Appearance-Based Loop Closure Detection via Locality-Driven Accurate Motion Field Learning

IEEE transactions on intelligent transportation systems (Print), 2021
Loop closure detection (LCD) is of significant importance in simultaneous localization and mapping. It represents the robot’s ability to recognize whether the current surrounding corresponds to a previously observed one.
Kaining Zhang, Xingyu Jiang, Jiayi Ma
semanticscholar   +1 more source

Efficient trajectory bending with applications to loop closure

2010 IEEE/RSJ International Conference on Intelligent Robots and Systems, 2010
In robotic applications the absolute pose is often obtained as the integral of successive relative rigid-body motions. As each relative rigid-body motion is typically the product of statistical inference, the integrated absolute pose will exhibit error build-up and the estimated trajectory will differ from the true trajectory undertaken by the system ...
Dubbelman, G., Esteban, I., Schutte, K.
openaire   +4 more sources

Loop Closure and Intersubunit Communication in Tryptophan Synthase^,

Biochemistry, 1998
Crystal structures of wild-type tryptophan synthase alpha2beta2 complexes from Salmonella typhimurium were determined to investigate the mechanism of allosteric activation of the alpha-reaction by the aminoacrylate intermediate formed at the beta-active site.
Schneider, T., Gerhardt, E., Lee, M., Liang, P., Anderson, K., Schlichting, I.   +5 more
openaire   +3 more sources

Loop-closure of the visual-cortical response

Proceedings of the IEEE 1988 National Aerospace and Electronics Conference, 2003
Results of a study designed to test the effectiveness of using feedback to consciously connect humans to their evoked response and thereby 'close the loop' around the brain are presented. A technique to achieve loop closure using a lock-in amplifier approach is presented.
A.M. Junker, C.W. Downey, J.H. Schnurer, D.F. Ingle   +3 more
openaire   +1 more source

Analysis of phosphatase 1B WPD loop closure

2010 5th International Symposium on Health Informatics and Bioinformatics, 2010
Protein tyrosine phosphatase 1B (PTP1B) is a negative regulator of insulin and leptin signaling, and is therefore a major molecular target for the treatment of type II diabetes and obesity. WPD loop is a key element in the mechanism of PTP1B catalysis.
Burcu Ozkaral, Ahmet Ozcan, Burak Alakent, Elif Ozkirimli   +3 more
openaire   +1 more source

Loop Closure

2021
Xiang Gao, Tao Zhang
openaire   +2 more sources

RNA conformational sampling. I. Single‐nucleotide loop closure

Journal of Computational Chemistry, 2007
AbstractWe consider the loop‐closure problem for nucleic acids and describe an efficient numerical algorithm for closing single‐nucleotide loops in nucleic acids. Using six new internal coordinates to represent the nucleotide conformation, which we call the R‐representation, the original closure problem with six free torsion angles in each nucleotide ...
openaire   +2 more sources