A refined method for occupancy grid interpretation

1996 ◽  
pp. 338-352 ◽  
Author(s):  
Kurt Konolige
Keyword(s):  
Occupancy Grid ◽  
Refined Method

scholarly journals LiDAR-Based Glass Detection for Improved Occupancy Grid Mapping

Sensors ◽  
2021 ◽  
Vol 21 (7) ◽  
pp. 2263
Author(s):  
Haileleol Tibebu ◽  
Jamie Roche ◽  
Varuna De Silva ◽  
Ahmet Kondoz
Keyword(s):  
Laser Scanner ◽  
Point Clouds ◽  
Light Detection And Ranging ◽  
Test Results ◽  
New Approach ◽  
Occupancy Grid ◽  
Laser Scanners ◽  
Novel Method ◽  
Occupancy Grid Mapping ◽  
Cartesian Coordinate

Creating an accurate awareness of the environment using laser scanners is a major challenge in robotics and auto industries. LiDAR (light detection and ranging) is a powerful laser scanner that provides a detailed map of the environment. However, efficient and accurate mapping of the environment is yet to be obtained, as most modern environments contain glass, which is invisible to LiDAR. In this paper, a method to effectively detect and localise glass using LiDAR sensors is proposed. This new approach is based on the variation of range measurements between neighbouring point clouds, using a two-step filter. The first filter examines the change in the standard deviation of neighbouring clouds. The second filter uses a change in distance and intensity between neighbouring pules to refine the results from the first filter and estimate the glass profile width before updating the cartesian coordinate and range measurement by the instrument. Test results demonstrate the detection and localisation of glass and the elimination of errors caused by glass in occupancy grid maps. This novel method detects frameless glass from a long range and does not depend on intensity peak with an accuracy of 96.2%.

Refined Optimization Analysis of 2G/3G Mode Switching

2013 ◽  
Vol 443 ◽  
pp. 349-353
Author(s):  
Yu Zhang ◽  
Chun Yang Wang
Keyword(s):  
Basic Principle ◽  
Implementation Process ◽  
Typical Case ◽  
Mode Switching ◽  
Continuous Development ◽  
Optimization Analysis ◽  
Refined Method ◽  
High Efficient ◽  
Specific Implementation

With the continuous development of the 3rd generation telecommunication, the requirement of fluent switching is taken more consideration. The paper presents the relevant parameters and the implication of 2G/3G mode switching in CS domain. Proposes the optimization analysis of the basic principle of 2G/3G mode switching in CS domain, suggests a method using neighboring CIO to refine the origin switching methods, with the analysis of typical case by using the specific implementation process of neighboring CIO, the refined method proved to be of actual value and high efficient

New Type of Two Degree of Freedom Motor Three-Dimensional Tooth Layer Field Application and Solution

2013 ◽  
Vol 391 ◽  
pp. 232-236
Author(s):  
Wen Huan Yang ◽  
Hai Xu Chen ◽  
Shuang Xie ◽  
Chun Ren Fang
Keyword(s):  
Linear Equations ◽  
Three Dimensional ◽  
Field Application ◽  
Degree Of Freedom ◽  
Refined Method ◽  
New Type ◽  
Type Motor ◽  
Quasi Newton ◽  
Two Degree Of Freedom ◽  
Non Linear Equations

A new Multi-degree of freedom motor and its establishing of teeth layer parameters have been introduced in the paper, also including application method of database, namely using Quasi-Newton methods to solve the non-linear equations of the new motors magnetic circuit net, formed a refined method for designing and analyzing of motor. The establishment of 3d tooth layer parameters database, is provided for the calculation in the design of the new type motor conveniently.

Dynamic world modeling for a mobile robot among moving objects

Robotica ◽  
1996 ◽  
Vol 14 (5) ◽  
pp. 553-560
Author(s):  
Yuefeng Zhang ◽  
Robert E. Webber
Keyword(s):  
Mobile Robot ◽  
Hough Transform ◽  
Moving Objects ◽  
Grid Method ◽  
Experimental Results ◽  
Sensor Data ◽  
Probabilistic Estimation ◽  
Occupancy Grid ◽  
World Modeling ◽  
Grid Based

SUMMARYA grid-based method for detecting moving objects is presented. This method involves the extension and combination of two methods: (1) the Hough Transform and (2) the Occupancy Grid method. The Occupancy Grid method forms the basis for a probabilistic estimation of the location and velocity of objects in the scene from the sensor data. The Hough Transform enables the new method to handle non-integer velocity values. A model for simulating a sonar ring is also presented. Experimental results show that this method can handle objects moving at non-integer velocities.

Bayesian occupancy grid mapping via an exact inverse sensor model

2016 ◽  
Author(s):  
Evan Kaufman ◽  
Taeyoung Lee ◽  
Zhuming Ai ◽  
Ira S. Moskowitz
Keyword(s):  
Occupancy Grid ◽  
Sensor Model ◽  
Grid Mapping ◽  
Occupancy Grid Mapping

Dermatography: 10 Years of Applications as an Adjuvant Treatment after Nipple and Areola Reconstruction

2000 ◽  
Vol 17 (1) ◽  
pp. 23-26 ◽  
Author(s):  
Eddy M. Van Der Velden ◽  
Brigitte H. I. M. Drost ◽  
Otto E. Ijsselmuiden ◽  
Abraham M. Baruchin
Keyword(s):  
Breast Cancer ◽  
Radiation Therapy ◽  
Breast Surgery ◽  
Total Resection ◽  
Refined Method ◽  
Aesthetic Results ◽  
The Aesthetic ◽  
Small Parts ◽  
Bilateral Reconstruction ◽  
Over Time

Introduction: Nipple and areola reconstruction have recently become in demand because more women are having breast surgery because of breast cancer diagnoses. Many methods for reconstructing the nipple and areola of the breast have been described and several treatment methods have been developed to improve the aesthetic results. The purpose of this paper is to describe one method, dermatography, a refined method of medical tattooing and the results obtained from this method. Materials and Methods: Over 10 years, 112 patients were treated with dermatography for nipple and areola reconstructions. Of these, 89 patients had received a unilateral reconstruction and 23 received a bilateral reconstruction. The first dermatographic treatment was given 8–12 months after the last intervention by the plastic surgeon. The average session lasted 45 minutes. Results were assessed by means of a short questionnaire. Results over time were evaluated by comparing pictures from previous sessions. Dermatography uses a modified tattooing called a dermainjector machine. Keloidectomy is the technique used to reduce keloid in postoperative scars. The needles of the dermainjector are positioned at an angle of 70–90 degrees to the scar surface. Small parts of the keloid are removed. At the same time pigmentation is performed. Results: Patients evaluated their results as satisfactory. Pigmentation over 5 years was judged to be stable with minor loss of pigment in only 6% of the patients, all of whom received radiation therapy for their cancer. Dermatography was well tolerated by the patients. None of the patients required local anesthesia. Discussion: Patients receiving total resection of their breasts are getting younger and perceiving the results as a severe deformation of their bodies. Results of reconstruction are judged very critically. We found that our patients considered the general visual aspect of the nipple and areola shape more important, and most of the patients did not consider reconstruction of the actual nipple mound to be necessary.

General Microhardness Indentation Theory for Multilayer Contacts

1997 ◽  
Vol 119 (1) ◽  
pp. 1-7 ◽  
Author(s):  
Peter A. Engel ◽  
Qian Yang
Keyword(s):  
Iterative Procedure ◽  
Microhardness Measurement ◽  
Computational Method ◽  
Experimental Investigations ◽  
Load Range ◽  
Composite Action ◽  
Refined Method ◽  
General Rules ◽  
Microhardness Indentation ◽  
Multilayer Materials

A refined method for interpreting the Vickers composite microhardness measurement for multilayer materials having layers of arbitrary plating thickness is first presented. The position of an “effective substrate” is found using the concept of the “plastic boundary,” and the depth-wise deformation of each layer is considered in a double-iterative procedure which converges fast. This computational method is then extended from pyramidal indenters to conical and spherical indenters (e.g., Meyer’s). For its confirmation, experimental investigations are carried out for two configurations of Cu/Ni/Au sandwiches, using different diameter spherical indenters and spherical tipped cones, through and well above the microhardness load range. The general rules for composite action are established.

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