scholarly journals An Improved Technique for Robot Global Localization in Indoor Environments

10.5772/10525 ◽  
2011 ◽  
Vol 8 (1) ◽  
pp. 7 ◽  
Author(s):  
Jihua Zhu ◽  
Nanning Zheng ◽  
Zejian Yuan
Keyword(s):  
Indoor Environments ◽  
Global Localization ◽  
Improved Technique

scholarly journals Semantic Localization System for Robots at Large Indoor Environments Based on Environmental Stimuli

Sensors ◽  
2020 ◽  
Vol 20 (7) ◽  
pp. 2116 ◽  
Author(s):  
Fco-Javier Serrano ◽  
Vidal Moreno ◽  
Belén Curto ◽  
Raul Álves
Keyword(s):  
Measurement Errors ◽  
Primary Particle ◽  
Geographical Information ◽  
Indoor Environments ◽  
Global Localization ◽  
Environmental Stimuli ◽  
Semantic Localization ◽  
Stimulus Localization ◽  
Robot Position

In this paper, we present a new procedure to solve the global localization of mobile robots called Environmental Stimulus Localization (ESL). We propose that the presence of common facts on the environment around the robot can be considered as stimuli for the procedure. The robust performance of our approach is supported by two concurrent particle filters. A primary particle filter estimates and tracks the robot position, while a secondary filter is fired by environmental stimuli, helps to reduce the influence of measurement errors and allows an earlier recovery from localization failures. We have successfully used this method in a 5000 m 2 real indoor environment using as inputs the available environment information from a Geographical Information System (GIS) map, the robot’s odometry and the output of an algorithm for the perception of facts from the environment. We present a case study and the result of different tests, showing the performance of our method under the influence of errors in real applications.

Aggregation of Cat Platelets in Vitro

1970 ◽  
Vol 23 (03) ◽  
pp. 601-620 ◽  
Author(s):  
Th. B Tschopp
Keyword(s):  
Adenosine Monophosphate ◽  
Blood Collection ◽  
Base Line ◽  
Reversible Aggregation ◽  
Low Concentrations ◽  
Irreversible Aggregation ◽  
High Concentrations ◽  
Two Phases ◽  
Improved Technique

SummaryAggregation of cat platelets in the citrated plasma is examined by means of Born’s absorptiometer. A marked tendency of the platelets of this species to spontaneous aggregation necessitated first of all the development of an improved technique of blood collection.A hypothesis according to which 5-HT is released from the platelets, explains the absence of oscillations on the base line of the absorptiometer, the absence of platelet swelling, when ADP is added, and the effect of stirring on the aggregation curves in cat PRP. The average volume of cat platelets amounts to 10.46 μ3 when directly fixed in the blood, when fixed from PRP to 12.17 μ3, when fixed from stirred PRP to 13.51 μ3.In low concentrations (0.3-2 μM) ADP produce reversible aggregation; in narrowly restricted, individually dissimilar mean concentrations irreversible aggregation in two phases and in high concentrations, irreversible aggregation in one phase. Like ADP serotonin produces 2 phase irreversible aggregation in concentrations of 3-10 μM, but unlike ADP, the aggregation velocity decreases again with high 5-HT concentrations (>100 μM). Adrenaline does not produce aggregation and it is likely that adenosine and adenosine monophosphate inhibit the aggregation by serotonin but not by ADP. Species differences in the aggregation of human, rabbit and cat platelets are discussed.

Endoscopic Calcaneoplasty: An Improved Technique

2012 ◽  
Vol 21 (03) ◽  
pp. 176-180 ◽  
Author(s):  
Sameh Aknoukh Labib ◽  
Albert Martin Pendleton
Keyword(s):  
Improved Technique

Improved technique for measuring mechanical deformations induced by an applied electric field to an organic insulator

2012 ◽  
Vol 15 (2-3) ◽  
pp. 127-139
Author(s):  
Tung Tran Anh ◽  
Laurent Berquez ◽  
Laurent Boudou ◽  
Juan Martinez-Vega ◽  
Alain Lacarnoy
Keyword(s):  
Electric Field ◽  
Applied Electric Field ◽  
Mechanical Deformations ◽  
Improved Technique
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