Variable Number of Multi-Sensor Fusion for Indoor RFID Tracking System

2013 ◽  
Vol 385-386 ◽  
pp. 654-657
Author(s):  
Xue Bo Jin ◽  
Jiang Feng Wang ◽  
Hui Yan Zhang ◽  
Li Hong Cao
Keyword(s):  
Tracking System ◽  
Estimation Algorithm ◽  
Measurement Model ◽  
Variable Number ◽  
Tracking Problem ◽  
Rfid Technology ◽  
Active Rfid ◽  
Target Trajectory ◽  
The Common ◽  
Indoor Tracking

We present a new method to accurately tracking persons indoors by active RFID technology. To deal with nonlinear measurement model, the EKF(extended Kalman filter) is used to estimate the target trajectory. This paper developed the fusion estimation algorithm for the common indoor tracking problem with the reader at any location and fusion estimation with variable number of multi-sensor system. Simulations show the algorithm developed here can adaptively adjust the model parameter while tracking and obtain good estimation performance for indoor RFID tracking.

UKF Fusion Estimation for Indoor RFID Tracking

2013 ◽  
Vol 427-429 ◽  
pp. 582-585
Author(s):  
Xue Bo Jin
Keyword(s):  
Radio Frequency ◽  
Radio Frequency Identification ◽  
Abrupt Change ◽  
Tracking System ◽  
Location Information ◽  
Target Trajectory ◽  
Practical System ◽  
Frequency Identification ◽  
Indoor Tracking

Radio frequency identification (RFID) can effectively get the accurate location information for indoor tracking system. The readers cant be placed at any position in the practical system. the reader would be more intensive at some places, where will obtain measurements from several readers, while the reader will be placed less at others place, where less or no measurements may be get when the target gets in this area. Therefore the target trajectory should be estimated by fusion filtering methods with variable sensors. The experiments show that the fusion UKF with variable sensors can overcome RFID nonlinear is smooth without abrupt change, even when the number of sensors has undergone great changes.

scholarly journals Novel MARG-Sensor Orientation Estimation Algorithm Using Fast Kalman Filter

2017 ◽  
Vol 2017 ◽  
pp. 1-12 ◽  
Author(s):  
Siwen Guo ◽  
Jin Wu ◽  
Zuocai Wang ◽  
Jide Qian
Keyword(s):  
Kalman Filter ◽  
Process Model ◽  
Attitude Determination ◽  
Angular Rate ◽  
Estimation Algorithm ◽  
Measurement Model ◽  
Estimation Accuracy ◽  
Orientation Estimation ◽  
Kinematic Equation ◽  
Sensor Orientation

Orientation estimation from magnetic, angular rate, and gravity (MARG) sensor array is a key problem in mechatronic-related applications. This paper proposes a new method in which a quaternion-based Kalman filter scheme is designed. The quaternion kinematic equation is employed as the process model. With our previous contributions, we establish the measurement model of attitude quaternion from accelerometer and magnetometer, which is later proved to be the fastest (computationally) one among representative attitude determination algorithms of such sensor combination. Variance analysis is later given enabling the optimal updating of the proposed filter. The algorithm is implemented on real-world hardware where experiments are carried out to reveal the advantages of the proposed method with respect to conventional ones. The proposed approach is also validated on an unmanned aerial vehicle during a real flight. Results show that the proposed one is faster than any other Kalman-based ones and even faster than some complementary ones while the attitude estimation accuracy is maintained.

Underlying Common Factors of Adolescent Problem Behaviors

2002 ◽  
Vol 29 (2) ◽  
pp. 161-182 ◽  
Author(s):  
Lening Zhang ◽  
John W. Welte ◽  
William F. Wieczorek
Keyword(s):  
Problem Behaviors ◽  
Latent Variable ◽  
Factor Model ◽  
Common Factor ◽  
Measurement Model ◽  
First Order ◽  
Adolescent Problem Behaviors ◽  
The Common ◽  
Order Factor ◽  
Second Order Factor Analysis

The Buffalo Longitudinal Study of Young Men was used to address the possibility of a common factor underlying adolescent problem behaviors. First, a measurement model with a single first-order factor was compared to a model with three separate correlated first-order factors. The three-factor model was better supported, making it logical to conduct a second-order factor analysis, which confirmed the logic. Second, a substantive model was estimated in each of two waves with psychopathic state as the common factor predicting drinking, drug use, and delinquency. Psychopathic state was stable across waves. The theory that a single latent variable accounts for large covariance among adolescent problem behaviors was supported.

scholarly journals Hospital Inpatient Tracking System Using RFID Technology

2020 ◽  
Vol 3 (2) ◽  
pp. c1-15
Author(s):  
CHIN LING CHIA ◽  
STEPHANIE CHUA
Keyword(s):  
Web Application ◽  
Tracking System ◽  
Medical Personnel ◽  
Hospital Inpatient ◽  
Rfid Technology ◽  
Time Duration ◽  
Accident And Emergency ◽  
Tracking Process ◽  
Government Hospitals ◽  
Accident And Emergency Department

Hospital Inpatient Tracking System using RFID technology is a web application developed for the medical personnel (doctors and nurses) to track the movements of the inpatients in the accident and emergency department of government hospitals. RFID reader fixed in each of the rooms will detect the patient who is wearing the registered tag when enter and leave from the room. It is designed to solve the problems of long queues, overcrowding, delayed treatments, and insufficient beds for patients. Tracking process is taken to track all of the registered patient. At the same time, duration of patient process in each of the room will be recorded and calculated to get the range of processing time in each of the room. It can be used as reference and solving the bottlenecks that faced by hospitals. All the medical personnel need to register and approved by system administrator before accessible to the system.

scholarly journals Assessing the scaling of a blockchain-based social contact tracking system

2021 ◽  
Vol 16 (3) ◽  
pp. 0
Author(s):  
Ilya Shmelev
Keyword(s):  
Conceptual Model ◽  
Tracking System ◽  
Social Contact ◽  
Hybrid Architecture ◽  
Unresolved Issue ◽  
Source Information ◽  
Social Contacts ◽  
Digital Infrastructure ◽  
Contact Tracking ◽  
The Common

During a pandemic, one of the most important tasks is to track social contacts with those who are sick. This article categorizes projects that track these contacts. Projects are classified by architecture and the common components of such systems are highlighted. It is concluded that the hybrid architecture of such a solution based on an exclusive blockchain will have several advantages, and a conceptual model of such a system is described. However, an analysis of existing blockchain projects showed that their main problem is the unresolved issue of scaling such kinds of systems, which is becoming a key issue in the context of creating a global digital infrastructure of society. Further, the scaling of the system's conceptual model is assessed based on open-source information about the Moscow metro, and the main conclusions about the selected architectural solutions are confirmed.

scholarly journals Heterozygosity and Chain Multivalents during Meiosis Illustrate Ongoing Evolution as a Result of Multiple Holokinetic Chromosome Fusions in the Genus Melinaea (Lepidoptera, Nymphalidae)

2017 ◽  
Vol 153 (4) ◽  
pp. 213-222 ◽  
Author(s):  
Melanie McClure ◽  
Bernard Dutrillaux ◽  
Anne-Marie Dutrillaux ◽  
Vladimir Lukhtanov ◽  
Marianne Elias
Keyword(s):  
Chromosome Evolution ◽  
Taxonomic Revision ◽  
Variable Number ◽  
Chromosome Fusion ◽  
Meiotic Chromosomes ◽  
In Captivity ◽  
Chromosome Fusions ◽  
The Common ◽  
Multiple Spindle ◽  
Complex Chromosome

Mitotic and meiotic chromosomes from 2 taxa of the genus Melinaea, M. satevis cydon and M. “satevis” tarapotensis (Lepidoptera: Nymphalidae), and from hybrids produced in captivity were obtained using an improved spreading technique and were subsequently analyzed. In one of the taxa, the presence of trivalents and tetravalents at diakinesis/metaphase I is indicative of heterozygosity for multiple chromosome fusions or fissions, which might explain the highly variable number of chromosomes previously reported in this genus. Two large and complex multivalents were observed in the meiotic cells of the hybrid males (32 chromosomes) obtained from a cross between M. “s.” tarapotensis (28 chromosomes) and M. s. cydon (40-43 chromosomes). The contribution of the 2 different haploid karyotypes to these complex figures during meiosis is discussed, and a taxonomic revision is proposed. We conclude that chromosome evolution is active and ongoing, that the karyotype of the common ancestor consisted of at least 48 chromosomes, and that evolution by chromosome fusion rather than fission is responsible for this pattern. Complex chromosome evolution in this genus may drive reproductive isolation and speciation, and highlights the difficulties inherent to the systematics of this group. We also show that Melinaea chromosomes, classically considered as holocentric, are attached to unique, rather than multiple, spindle fibers.

Mobile Enabled RFID-GPS Based Bus Tracking System

2014 ◽  
Vol 6 (4) ◽  
pp. 10-34 ◽  
Author(s):  
Suresh Sankaranarayanan ◽  
Paul Hamilton
Keyword(s):  
Public Transportation ◽  
Tracking System ◽  
Research Work ◽  
Transportation Systems ◽  
Urban Transport ◽  
Time Of Arrival ◽  
Rfid Technology ◽  
Arrival Times ◽  
Traffic Lights ◽  
Bus Stops

Public transportation in many countries is being used as a means of transport for travelling and accordingly people would prefer these public transportation to be scheduled properly, on time and the frequency be adequately fixed for commuters to make good use of it. It has been found that quite an amount of research work has been carried out, by way of using RFID technology in the public transportation systems towards the tracking of passengers when they board and exit buses. In addition research has also been carried out in using GPS towards the tracking of buses along with RFID technology at traffic lights, bus stops, intersections etc and also displaying expected arrival times on LCD screen at bus stops along with their current positions. Taking these aspects into consideration, an intelligent mobile bus tracking system for the Jamaican Urban Transport Corporation has been proposed and validated as a case study. The proposed system also enables commuters towards tracking the bus of their choice and also knowing their expected arrival times. So taking the above aspects into consideration, in this research the authors have proposed and validated on how control center of a bus company could track the location of a bus based on information received from RFID reader and GPS Transmitter positioned at various Bus stops and in the Bus and accordingly the expected time of arrival calculated for displaying the information on commuter's handset via Gmap. The implementation of the bus tracking scheme has been carried out using Adobe Flash player and Java.

scholarly journals Understanding the Impact of Trunk and Arm Impairments on Wheelchair Rugby Performance During Competition

2019 ◽  
Vol 14 (5) ◽  
pp. 612-619 ◽  
Author(s):  
Barry S. Mason ◽  
Viola C. Altmann ◽  
Victoria L. Goosey-Tolfrey
Keyword(s):  
Performance Measures ◽  
Tracking System ◽  
Technical Skills ◽  
Wheelchair Rugby ◽  
Technical Performance ◽  
Indoor Tracking ◽  
Arm Function ◽  
The Impact ◽  
Technical Measures ◽  
Measures Of Performance

Purpose: To determine the effect of trunk and arm impairments on physical and technical performance during wheelchair rugby (WR) competition. Methods: Thirty-one highly trained WR players grouped according to their trunk (no trunk [NT]; some trunk [T] function) and arm impairments (poor, moderate, and good arm function) participated in 5 WR matches. Players’ physical (wheelchair mobility) and technical (ball handling) activities were analyzed using an indoor tracking system and video analysis, respectively. Results: Trunk impairment explained some of the variance in physical (10.6–23.5%) and technical (16.2–33.0%) performance. T covered more distance, had more possession, scored more goals, and received and made more passes yet spent less time at low speeds and performed fewer inbounds than NT (≤.05). Arm impairment explained some of the variance in all physical (16.7–47.0%) and the majority of technical (13.1–53.3%) performance measures. Moderate and good arm function covered more distance, reached higher peak speeds, spent more time in higher speed zones, scored more goals, had more possession, and received and made more passes, with a higher percentage of 1-handed and long passes, than poor arm function. Good arm function also received more passes and made a higher percentage of 1-handed passes and defensive blocks than moderate arm function (P ≤ .05). Conclusions: Arm impairment affects a greater number of physical and technical measures of performance specific to WR than trunk impairment during competition. Having active finger function (good arm function) yielded no further improvements in physical performance but positively influenced a small number of technical skills.

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