A Study on the Active Vector Model for Object Tracking

2020 ◽  
Vol 25 (3) ◽  
pp. 67-73
Author(s):  
Dong-Hyun Ju
Keyword(s):  
Shape Change ◽  
Vector Model ◽  
Position Vector ◽  
Principle Components Analysis ◽  
Change Vector ◽  
Components Analysis ◽  
Tracking Object ◽  
The Cost ◽  
Point Vector ◽  
Moving Pattern

In this thesis we propose a new active vector model which is able to track objects with an algorithm. First of all we classified a few basic shapes as the modes of the tracking object, which were learned by the principle components analysis, and then we extracted the representative feature vector and the minimum shape parameters. And we reorganize the sequence of basic shape change to the shape change based on the feature point vector. We modeled the object of target tracking and its moving using both the feature position vector and shape change vector obtained by the above process. The proposed method generates parameterized values based on the moving pattern of the object, provides better stability of the local structure than other models, and decreases the cost of convergence duration, which is the weakness of model-based tracking algorithms.

The Modeling and Locating Technology of Assembly\Disassembly Tools in Virtual Environment

2013 ◽  
Vol 483 ◽  
pp. 229-233
Author(s):  
Yi Liu ◽  
Shi Qi Li ◽  
Jun Feng Wang
Keyword(s):  
Real Time ◽  
Virtual Environment ◽  
Virtual Assembly ◽  
Vector Model ◽  
Assembly System ◽  
Virtual Scene ◽  
Matching Constraints ◽  
Point Vector

This paper presents a feasible approach for modeling and locating of assembly\disassembly tools in the virtual scene: First, a novel point-vector model for tool is presented by means of abstracting the locating constraints of tools; Then, the mapping relationship for locating constraints between tools and parts is detailed; Finally, the best matching constraints algorithm is proposed on basis of point-vector model, which can calculate the locating constraints to the triangle model of part in real time. The proposed method has been integrated in the virtual assembly system to solve practical assembly problems.

scholarly journals Insomnia among Egyptian Samples of University Students and Employees

2014 ◽  
Vol 8 (2) ◽  
pp. 377
Author(s):  
Ahmed Abdel-Khalek ◽  
Maysa al Nyal ◽  
Hanan Saeed
Keyword(s):  
University Students ◽  
Prevalence Rate ◽  
Age Groups ◽  
Female Students ◽  
Principle Components Analysis ◽  
Female Employees ◽  
Males And Females ◽  
Components Analysis ◽  
Male University Students ◽  
Two Age Groups

The aim of this study was to estimate the prevalence of insomnia, differences between males and females, and between two age groups, and to explore the factorial structure of the Arabic Scale of Insomnia (ASI). Samples of university students (n=500) and employees (n=457) of both sexes were recruited. Female university students obtained the highest mean total score on the ASI, followed by female employees, male university students, and finally male employees. The salient significant differences were between female students and male employees and between male and female employees. Despite the differences in the prevalence rate of insomnia between the four groups, they all agreed on that the least prevalence rate was for the item: “I feel depressed when it is time for me to go to bed, whereas the highest prevalence rate was for the item: “My interrupted sleep annoys me.” Principle components analysis yielded three factors for each group. Most of their names were not identical. The most salient finding of this study was the statistically significant sex differences in insomnia in favor of women. It was concluded that is it important to introduce counseling for those who obtained high scores on the ASI. 

scholarly journals Indigenous Land and Sea Management Programs (ILSMPs) Enhance the Wellbeing of Indigenous Australians

2019 ◽  
Vol 17 (1) ◽  
pp. 125 ◽  
Author(s):  
Silva Larson ◽  
Natalie Stoeckl ◽  
Diane Jarvis ◽  
Jane Addison ◽  
Daniel Grainger ◽  
...  
Keyword(s):  
Environmental Management ◽  
Indigenous People ◽  
Indigenous Communities ◽  
Indigenous Australians ◽  
Future Design ◽  
Principle Components Analysis ◽  
Wide Range ◽  
Components Analysis ◽  
Language Schools ◽  
Indigenous Land

Conservation and environmental management have been reported as offering opportunities to substantially improve the wellbeing of Indigenous people. Using the holistic wellbeing impact evaluation (W-IE) approach—well suited for use in Indigenous communities—we interviewed 190 Indigenous Australians across four communities. All communities were involved in the Indigenous land and sea management programs (ILSMPs). Our study explored the conceptualisation of ‘wellbeing’ by participants. In particular, we were interested in the aspects of wellbeing perceived to be affected by ILSMPs. Out of the 26 wellbeing factors explored, ‘Health centres’; ‘Language’; ‘Schools’; and ‘Safe community’ emerged as being of highest importance to the largest percentage of the respondents. When grouped using principle components analysis (PCA), the ‘Community and society’ domain emerged as the most important; accounting for 52% of the overall importance of all wellbeing factors. The second most important domain was the ‘Country and culture’, contributing 31%. Lastly, ‘Economic aspects’ contributed only 17%. Respondents believed that ILSMPs have played a considerable causal role in improving wellbeing, by positively changing factors most important to them. Specifically, 73% of perceived causal links were related to improvements in the ‘Country and Culture’ and 23% to ‘Community and Society’ domain. We thus conclude that land management for Indigenous people is much more than ecological or environmental management with ILSMPs, perceived to cause a wide range of cultural and social benefits. We also propose ways in which the future design of such programs could be improved to further increase benefits.

Examining social, physical, and environmental dimensions of tornado vulnerability in Texa

2016 ◽  
Vol 14 (2) ◽  
pp. 139
Author(s):  
Laura Siebeneck, PhD
Keyword(s):  
Vulnerability Index ◽  
Census Bureau ◽  
Source Information ◽  
Principle Components Analysis ◽  
Emergency Managers ◽  
The Social ◽  
Vulnerability Model ◽  
The Us ◽  
Components Analysis ◽  
Us Census

Objective: To develop a vulnerability model that captures the social, physical, and environmental dimensions of tornado vulnerability of Texas counties. Design: Guided by previous research and methodologies proposed in the hazards and emergency management literature, a principle components analysis is used to create a tornado vulnerability index. Data were gathered from open source information available through the US Census Bureau, American Community Surveys, and the Texas Natural Resources Information System.Setting: Texas counties.Results: The results of the model yielded three indices that highlight geographic variability of social vulnerability, built environment vulnerability, and tornado hazard throughout Texas. Further analyses suggest that counties with the highest tornado vulnerability include those with high population densities and high tornado risk.Conclusions: This article demonstrates one method for assessing statewide tornado vulnerability and presents how the results of this type of analysis can be applied by emergency managers towards the reduction of tornado vulnerability in their communities.

Evaluating the effects of chronological age and sentence duration on degree of perceived foreign accent

2006 ◽  
Vol 27 (2) ◽  
pp. 157-183 ◽  
Author(s):  
IAN R. A. MACKAY ◽  
JAMES E. FLEGE ◽  
SATOMI IMAI
Keyword(s):  
Language Use ◽  
Foreign Accent ◽  
Chronological Age ◽  
Principle Components Analysis ◽  
Foreign Accents ◽  
Components Analysis ◽  
Early Learners ◽  
Influence Degree ◽  
Speech Learning ◽  
Early Late

Immigrants' age of arrival (AOA) in a country where a second language (L2) must be learned has consistently been shown to affect the degree of perceived L2 foreign accent. Although the effect of AOA appears strong, AOA is typically correlated with other variables that might influence degree of foreign accent. This study examined the pronunciation of English by native Italian immigrants to Canada who differed in AOA. As in previous research, those who arrived as young adults (late learners) were somewhat older at the time of testing, and produced somewhat longer English sentences, than those who arrived in Canada when they were children (early learners). The results of Experiment 1 showed that the greater chronological age of early than late learners was not responsible for the late learners' stronger foreign accents. Experiment 2 suggested that the late learners' longer L2 sentences were not responsible for observed early–late foreign accent differences. A principle components analysis revealed that variation in AOA and language use, but not chronological age or sentence duration, accounted for a significant amount of variance in the foreign accent ratings. The findings of the study were interpreted to mean that AOA effects on foreign accent are due to the development of the native language phonetic system rather than to maturational constraints on L2 speech learning.

Climatic niche modeling reveals divergence between cytotypes in Eutrema edwardsii (Brassicaceae)

Botany ◽  
2018 ◽  
Vol 96 (12) ◽  
pp. 813-823
Author(s):  
Jared E. Mastin ◽  
Peter Anthamatten ◽  
Leo P. Bruederle
Keyword(s):  
Flow Cytometry ◽  
Genetic Material ◽  
Null Distribution ◽  
Niche Overlap ◽  
Niche Differentiation ◽  
Niche Modeling ◽  
The Arctic ◽  
The Novel ◽  
Principle Components Analysis ◽  
Components Analysis

Polyploidy among plants is most frequent in the arctic, where glaciation cycles put selective pressures on populations by repeated fragmentation and fluctuation in climate. Polyploids should have been more fit in the novel habitats created as glaciers receded because of increased genetic material and novel gene products, which results in phenotypic plasticity and rapid adaptation. Higher ploidy is then expected to confer a broader tolerance of environmental conditions. Eutrema edwardsii R. Br. (Brassicaceae) is an arctic-alpine mustard with a near circumpolar distribution that occurs as a tetraploid, hexaploid, and octaploid. We used flow cytometry to document the distribution of polyploid cytotypes using herbarium tissue, and modeled the niche of each cytotype to test for niche differentiation. Flow cytometry revealed four cytotypes among 85 individuals. Notably, 60% of the herbarium tissue assays were successful using tissue up to 50 years old. Principle components analysis was performed on 20 climatic variables, of which, the first four axes were used as environmental variables for niche modeling. Niche models were created for tetraploid and hexaploid populations and used to calculate niche overlap (Shoener’s D). Overlap between tetraploid and hexaploid models (D = 0.534) is lower than the null distribution (D = 0.681–0.944) supporting the hypothesis of niche divergence.

Simulation of the ocean reflectance spectra based on principle components analysis method

2008 ◽  
Author(s):  
Xiulin Lou ◽  
Weigen Huang ◽  
Shouren Lin ◽  
Lidi Chen ◽  
Bin Fu ◽  
...  
Keyword(s):  
Reflectance Spectra ◽  
Analysis Method ◽  
Principle Components Analysis ◽  
Components Analysis
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