Sorting of Section Contour Data Based on Linear Quadtree

2012 ◽  
Vol 215-216 ◽  
pp. 635-638
Author(s):  
Jing Liu
Keyword(s):  
Discrete Data ◽  
Node Search

A method based on the linear quadtree is proposed to sort the discrete data of the section contour. Firstly the contour data are distributed to different nodes of the linear quadtree and the data in the same node are sorted. Then neighbor node search regulations are established to help sort data in different nodes counter-clockwise. Experiment shows that the presented method can sort the data effectively.

Integrated Fractional white Noise as an Alternative to Multifractional Brownian Motion

2007 ◽  
Vol 44 (02) ◽  
pp. 393-408 ◽  
Author(s):  
Allan Sly
Keyword(s):  
Stochastic Process ◽  
Brownian Motion ◽  
White Noise ◽  
Gaussian Process ◽  
Discrete Data ◽  
Hölder Exponent ◽  
Scaling Properties ◽  
Multifractional Brownian Motion ◽  
Local Properties

Multifractional Brownian motion is a Gaussian process which has changing scaling properties generated by varying the local Hölder exponent. We show that multifractional Brownian motion is very sensitive to changes in the selected Hölder exponent and has extreme changes in magnitude. We suggest an alternative stochastic process, called integrated fractional white noise, which retains the important local properties but avoids the undesirable oscillations in magnitude. We also show how the Hölder exponent can be estimated locally from discrete data in this model.

A two-dimensional sideways problem with random discrete data

2021 ◽  
Vol 86 ◽  
pp. 16-32
Author(s):  
Dang Duc Trong ◽  
Tran Quoc Viet ◽  
Vo Dang Khoa ◽  
Nguyen Thi Hong Nhung
Keyword(s):  
Discrete Data ◽  
Two Dimensional

scholarly journals The Performance of Post-Fall Detection Using the Cross-Dataset: Feature Vectors, Classifiers and Processing Conditions

Sensors ◽  
2021 ◽  
Vol 21 (14) ◽  
pp. 4638
Author(s):  
Bummo Koo ◽  
Jongman Kim ◽  
Yejin Nam ◽  
Youngho Kim
Keyword(s):  
Time Series ◽  
Fall Detection ◽  
Discrete Data ◽  
Classification Performance ◽  
Training Data ◽  
Processing Conditions ◽  
Feature Vectors ◽  
External Data ◽  
Public Dataset ◽  
The Cross

In this study, algorithms to detect post-falls were evaluated using the cross-dataset according to feature vectors (time-series and discrete data), classifiers (ANN and SVM), and four different processing conditions (normalization, equalization, increase in the number of training data, and additional training with external data). Three-axis acceleration and angular velocity data were obtained from 30 healthy male subjects by attaching an IMU to the middle of the left and right anterior superior iliac spines (ASIS). Internal and external tests were performed using our lab dataset and SisFall public dataset, respectively. The results showed that ANN and SVM were suitable for the time-series and discrete data, respectively. The classification performance generally decreased, and thus, specific feature vectors from the raw data were necessary when untrained motions were tested using a public dataset. Normalization made SVM and ANN more and less effective, respectively. Equalization increased the sensitivity, even though it did not improve the overall performance. The increase in the number of training data also improved the classification performance. Machine learning was vulnerable to untrained motions, and data of various movements were needed for the training.

A useful distribution for fitting discrete data: revival of the Conway-Maxwell-Poisson distribution

2005 ◽  
Vol 54 (1) ◽  
pp. 127-142 ◽  
Author(s):  
Galit Shmueli ◽  
Thomas P. Minka ◽  
Joseph B. Kadane ◽  
Sharad Borle ◽  
Peter Boatwright
Keyword(s):  
Poisson Distribution ◽  
Discrete Data

SURVEILLANCE OF DIABETES PREVALENCE RATE THROUGH THE DEVELOPMENT OF A MARKOV-BASED CONTROL CHART

2012 ◽  
Vol 12 (04) ◽  
pp. 1250083
Author(s):  
PERSHANG DOKOUHAKI ◽  
RASSOUL NOOROSSANA
Keyword(s):  
Control Chart ◽  
Control Charts ◽  
High Performance ◽  
Discrete Data ◽  
Correlated Data ◽  
Statistical Process ◽  
Control Charting ◽  
Attribute Quality ◽  
Related Process

In the field of statistical process control (SPC), usually two issues are addressed; the variables and the attribute quality characteristics control charting. Focusing on discrete data generated from a process to be monitored, attributes control charts would be useful. The discrete data could be classified into two categories; the independent and auto-correlated data. Regarding the independence in the sequence of discrete data, the typical Shewhart-based control charts, such as p-chart and np-chart would be effective enough to monitor the related process. But considering auto-correlation in the sequence of the data, such control charts would not workanymore. In this paper, considering the auto-correlated sequence of X1, X2,…, Xt,… as the sequence of zeros or ones, we have developed a control chart based on a two-state Markov model. This control chart is compared with the previously developed charts in terms of the average number of observations (ANOS) measure. In addition, a case study related to the diabetic people is investigated to demonstrate the applicability and high performance of the developed chart.

Quartiles for Discrete Data

2001 ◽  
Vol 23 (3) ◽  
pp. 86-89 ◽  
Author(s):  
A.H. Joarder ◽  
M. Firozzaman
Keyword(s):  
Discrete Data

scholarly journals Management of multidimensional discrete data

1994 ◽  
Vol 3 (4) ◽  
pp. 401-444 ◽  
Author(s):  
Peter Baumann
Keyword(s):  
Discrete Data
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