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REPOSE: Distributed Top-k Trajectory Similarity Search with Local Reference Point Tries [article]

Bolong Zheng, Lianggui Weng, Xi Zhao, Kai Zeng, Xiaofang Zhou, Christian S. Jensen
2021 arXiv   pre-print
We develop a reference point trie (RP-Trie) index to organize trajectory data for local search.  ...  We propose a distributed in-memory management framework called REPOSE for processing top-k trajectory similarity queries on Spark.  ...  Therefore, the top-2 result is {τ 1 , τ 4 }. III. REFERENCE POINT TRIE Before describing the distributed framework, we proceed to introduce a reference point trie (RP-Trie) index for local search.  ... 
arXiv:2101.08929v2 fatcat:pt7nzqbnefasxnahkzwyigretq

Numerical predictions of surface effects during the 2029 close approach of Asteroid 99942 Apophis

Yang Yu, Derek C. Richardson, Patrick Michel, Stephen R. Schwartz, Ronald-Louis Ballouz
2014 Icarus (New York, N.Y. 1962)  
A full-body model of Apophis is sent past the Earth on the predicted trajectory to generate the data of all forces acting at a target point on the surface.  ...  This paper provides a prediction for the tidal effects during the 2029 encounter, with an emphasis on whether surface refreshing due to regolith movement will occur.  ...  i.e., the local plane tangential to the asteroid surface at the target point) with a ''sandpile'' resting on top.  ... 
doi:10.1016/j.icarus.2014.07.027 fatcat:jhrzgbkkg5amphb4siobdenxdu

Determination of the One-to-One Correspondence between the Kinematic Screw of the Output Link and the Gradient Screw in a Singular Configuration of a Parallel Mechanism
Определение взаимного соответствия кинематического винта выходного звена и винта-градиента в особом положении механизма параллельной структуры

Е.С. Гебель, В.А. Глазунов
2017 Proceedings of Higher Educational Institutions Маchine Building  
(11) , and obtain the reachable workspace U R ; 2) Choose the terminal points in the surface of U R , and generate the searching trajectories from them; 3) Traverse in the range of (−π, π] with the step  ...  The origin of each reference frame will be defined as Point O i .  ...  N X can be further changed towards various directions along the searching path. It is quite possible to find a solution to the optimal design problem with the fewest constraints.  ... 
doi:10.18698/0536-1044-2017-7-3-9 fatcat:5xx3qrdmqjfr7ng5oecrdzeb34

Computational rim illumination of dynamic subjects using aerial robots

Manohar Srikanth, Kavita Bala, Frédo Durand
2015 Computers & graphics  
With an indoor setup, we demonstrate a control approach that localizes the aerial robot with reference to the subject and tracks the subject to achieve the necessary motion.  ...  We focus on rim lighting, a particularly challenging effect to achieve with dynamic subjects, and allow the photographer to specify a required rim width.  ...  When the subject reposes or moves, our strategy is to maintain a consistent lighting with reference to the previously optimized setting.  ... 
doi:10.1016/j.cag.2015.03.007 fatcat:ecfpdjwrkvhtpl7byz2vqk45uu

Asteroid Surface Geophysics [chapter]

N. Murdoch, P. Sánchez, S. R. Schwartz, H. Miyamoto
2015 Asteroids IV  
The search for contacts in SSDEM is a simpler task than the search for contacts (collisions) in HSDEM.  ...  At this point it is worth explaining that the static angle of repose is the maximum slope that can be supported before the formation of an avalanche and a dynamic angle of repose is the slope that results  ... 
doi:10.2458/azu_uapress_9780816532131-ch039 fatcat:dr34kwu2bfcatagnllcfgv72bi

Simulation of Granular Flows and Pile Formation in a Flat-Bottomed Hopper and Bin, and Experimental Verification

Shinichi Yuu, Toshihiko Umekage
2011 Materials  
The granular flow patterns, the shapes of piles and the granular flow rates in the evolution are compared with experimental data measured under the same conditions.  ...  There was good agreement between these results, which suggests that the constitutive relations and the simulation method would be applicable for predicting granular flows and pile formation with complex  ...  The free surface on the pile in the bin is nearly horizontal and does not form the angle of repose. The pile grows with the similar shape to those at t = 0.2 s and 0.3 s.  ... 
doi:10.3390/ma4081440 pmid:28824153 pmcid:PMC5448677 fatcat:cwsyv3ofpjdpppmi6gpjukweea

Contact-Aware Retargeting of Skinned Motion [article]

Ruben Villegas, Duygu Ceylan, Aaron Hertzmann, Jimei Yang, Jun Saito
2021 arXiv   pre-print
We introduce a novel geometry-conditioned recurrent network with an encoder-space optimization strategy that achieves efficient retargeting while satisfying contact constraints.  ...  We preprocess each motion sequence similar to [32, 20, 16] by separating into local pose and global pose.  ...  Hence, we set the weights based on geodesic distance, with a small weight for triangles that are close together on the surface: w r,i = η −1 min vj ∈fr,v k ∈fi D(v j , v k ) (5) where D(v j , v k ) is  ... 
arXiv:2109.07431v1 fatcat:ntxput4hlzbe3oeuxgxh4gbfii

Handoff Management Relying on RFID Technology

Apostolia Papapostolou, Hakima Chaouchi
2010 2010 IEEE Wireless Communication and Networking Conference  
In the second case, we assume the user is also equipped with a digital compass and therefore, only points with similar orientation are considered.  ...  A bigger search space increases the probability of finding a very similar point but also the location-based fingerprint lose their priority over the orientation-based fingerprints.  ... 
doi:10.1109/wcnc.2010.5506534 dblp:conf/wcnc/PapapostolouC10 fatcat:utbsxhckdzf6bk6twloibiihlu

ABSTRACTS OF INVITED LECTURES

2007 Acta Clinica Belgica  
In the present paper we discuss three complex dynamical systems with non-gaussian scaling regime described by the Weibull distribution.  ...  To detect and localize phase synchronization and stochastic phase resetting dynamics in the human brain non-invasively with magnetoencephalography novel methods have been developed:  ...  We illustrate some problems in characterising slow modes in real measurements and show that oscillatory dynamics under the influence of strong noise, coupled with a limited time of observation, can lead  ... 
doi:10.1179/acb.2007.62.s1.032 pmid:24881725 fatcat:d37omd2l2nhnfnqjw7nbb7gjt4

Abstracts of Invited Lectures

2012 Asia-Pacific Psychiatry  
In the present paper we discuss three complex dynamical systems with non-gaussian scaling regime described by the Weibull distribution.  ...  To detect and localize phase synchronization and stochastic phase resetting dynamics in the human brain non-invasively with magnetoencephalography novel methods have been developed:  ...  We illustrate some problems in characterising slow modes in real measurements and show that oscillatory dynamics under the influence of strong noise, coupled with a limited time of observation, can lead  ... 
doi:10.1111/appy.12002 fatcat:snd6hn73bvh5liawo4pkmxirue

Evolution and development of neural controllers for locomotion, gradient-following, and obstacle-avoidance in artificial insects

J. Kodjabachian, J.-A. Meyer
1998 IEEE Transactions on Neural Networks  
Chaque point représente une solution Pareto optimale.  ...  Angeli A, Filliat D, Doncieux S and Meyer J-A 2006 2D simultaneous localization and mapping for micro aerial vehicles.  ...  The authors wish to thank Thierry Druot for the development of the flight simulator and for his help with the analysis of the huge amount of data produced by the simulation.  ... 
doi:10.1109/72.712153 pmid:18255767 fatcat:iy4zjzgcjzc6pmwoqp3c5xpfga

Molecular Basis of SMC ATPase Activation: Role of Internal Structural Changes of the Regulatory Subcomplex ScpAB

Katsuhiko Kamada, Makoto Miyata, Tatsuya Hirano
2013 Structure  
The two C-terminal domains of the ScpB dimer primarily interact with different regions of ScpA with different affinities.  ...  Together with other genetic and biochemical assays, we provide evidence that internal structural changes of the ScpAB subcomplex are tightly coupled with activation of the structural-maintenance-of-chromosomes  ...  Ueno operating BL26B beamlines at SPring-8 for assistance with data collection. We are indebted to Drs. M. Usui and K. Otsuki for analyses by mass spectrometry; T. Kikitsu, Y. Tahara, and H.  ... 
doi:10.1016/j.str.2013.02.016 pmid:23541893 fatcat:mhgdyb3ql5d6ljk4zkeyl3jqbe

Froth across the Universe Dynamics and Stochastic Geometry of the Cosmic Foam [article]

Rien van de Weygaert
2002 arXiv   pre-print
Its distinct geometric character and the stochastic nature provides the cosmic web with some unique and at first unexpected properties.  ...  These tidal fields play an essential role in shaping the pattern of the large scale cosmic matter distribution.  ...  A depiction of the idea of 'self-similarity' in the vertex distribution. Out of a full sample of vertices (top left) in a central slice, (top right) the 20.0% richest vertices.  ... 
arXiv:astro-ph/0206427v1 fatcat:oxqdj3fahjezhgwte2gs4vp6ry

Gesture and language dialectic

David McNeill
2002 Acta Linguistica Hafniensia. International Journal of Structural Linguistics  
The dialectic also seeks repose and, at this point, the static dimension appears.  ...  In the dialectic model, the static dimension is a special case -the point of repose toward which dynamic change tends; the end-point of the process.  ... 
doi:10.1080/03740463.2002.10414607 fatcat:wx5t36l6q5gr3m3zt3sqjqwaey

DePhine – The Deimos and Phobos Interior Explorer

Jürgen Oberst, Kai Wickhusen, Konrad Willner, Klaus Gwinner, Sofya Spiridonova, Ralph Kahle, Andrew Coates, Alain Herique, Dirk Plettemeier, Marina Díaz-Michelena, Alexander Zakharov, Yoshifumi Futaana (+6 others)
2018 Advances in Space Research  
The spacecraft orbit will then be changed into a Phobos resonance orbit to carry out multiple close flybys and to perform similar remote sensing as for Deimos.  ...  We will search for slopes near angle of repose and associated landslides.  ...  We will search for hemispheric asymmetries in the distributions of the craters.  ... 
doi:10.1016/j.asr.2017.12.028 fatcat:ispneof2lve3bp4lio6r7ppsj4
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