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Simple Human Gesture Detection and Recognition Using a Feature Vector and a Real-Time Histogram Based Algorithm

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Journal of Signal and Information Processing 2011年第4期2卷 279-286页

作者： iván Gómez-Conde David Olivieri Xosé Antón Vila Stella Orozco-Ochoa 不详

Gesture and action recognition for video surveillance is an active field of computer vision. Nowadays, there are several techniques that attempt to address this problem by 3D mapping with a high computational cost. This paper describes software algorithms that can detect the persons in the scene and analyze different actions and gestures in real time. The motivation of this paper is to create a system for thetele-assistance of elderly, which could be used as early warning monitor for anomalous events like falls or excessively long periods of inactivity. We use a method for foreg-round-background segmentation and create a feature vectorfor discriminating and tracking several people in the scene. Finally, a simple real-time histogram based algorithm is described for discriminating gestures and body positions through a K-Means clustering.

关键词： Computer Vision Foreground Segmentation Object Detection and Tracking Gesture Recognition Tele-Assistance Telecare

Metric of a Slow Rotating Body with Quadrupole Moment from the Erez-Rosen Metric

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International Journal of Astronomy and Astrophysics 2013年第4期3卷 431-437页

作者： Francisco Frutos-Alfaro Edwin Retana-Montenegro iván Cordero-García Javier Bonatti-González School of Physics University of Costa Rica San Pedro Costa Rica

A metric representing a slowly rotating object with quadrupole moment is obtained using a perturbation method to include rotation into the weak limit of the Erez-Rosen metric. This metric is intended to tackle relativ... 详细信息

关键词： General Relativity Einstein Field Equations Quadrupole Moment Erez-Rosen Metric

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中国能量：中国电力行业的改革与发展

公共管理评论 2007年 1-23页

作者： Edward A.Cunningham,iv 麻省理工学院工业绩效研究中心

最近几年,中国石油与天然气的增长引起了广泛的注意,而消耗资源相对更多的电力生产却被忽视了。发电行业最近几年进行了大规模的改革,这是研究中国能源决策很有用的案例。中国的电力发展在很多方面都是成功的,这说明正式的分权、自上而... 详细信息

最近几年,中国石油与天然气的增长引起了广泛的注意,而消耗资源相对更多的电力生产却被忽视了。发电行业最近几年进行了大规模的改革,这是研究中国能源决策很有用的案例。中国的电力发展在很多方面都是成功的,这说明正式的分权、自上而下的公司结构以及事实上的放松市场进入的管制可以迅速增加产出,同时减缓燃料多样化的进程。该行业在增长的同时也面临一些问题:扩张的同时忽视了急需的产权改革,环保执行力度不强以及中央管制机构对公司监管的缺失。文章包括三个方面:(1)在国家层面,中国的能源治理是分散的并且缺乏连贯性,决策事实上在地方层面做出;(2)在行业层面,容量迅速增长,同时产权非常多样化;(3)在公司层面,传统的电力公司与核能企业、非传统的资源企业以及上游资源企业的混合公司形态出现。

关键词：能源管制治理公司中国电力分权化

太古代超MgFe—MgFe质侵入体中铂族元素的成矿作用

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吉林地质科技情报 1996年第5期 23-24页

作者： Buch.,iv

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高强度低合金耐低温可焊钢

国外钢铁钒钛 1991年第1期4卷 35-40页

作者： Gory.,iv 凌平

Experimental Analysis of a Node B Coverage Based on the CPICH and Ec/Io Values

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Wireless Engineering and Technology 2011年第1期2卷 23-29页

作者： iván Zamudio-Castro Sergio Vidal-Beltrán Jazmín Ponce-Rojas Jorge Sosa-Pedroza 不详

This paper presents experimental results of a coverage analysis in a WCDMA network using the 850 MHz band;an urban electromagnetic propagation environment is considered. Obtained coverage estimation maps are based on Krige statistical method of interpolation. Key performance parameters used in this work are the CPICH and Ec. The results could be used to identify problems and help to optimize cell coverage and capacity in a given service area.

关键词： WCDMA Coverage Analysis CPICH Ec/Io

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可连续读数的低温液体用电容液面计

低温工程 1991年第3期 51-58页

作者： Veli.,iv 成华

A New Model for Spreading Malware over SMS Using Network Automata

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Communications and Network 2023年第4期15卷 120-143页

作者： Erick iván Medina-Salas Ana Lilia Laureano-Cruces Ma. Elena Lárraga-Ramírez Posgrado en Ciencia e Ingeniería de la Computación UNAM México City México Departamento de Sistemas UAM-A México City México Laboratoire Informatique d’Avignon Avignon France Instituto de Ingeniería UNAM México City México

By the year 2026, it is estimated that the number of smartphone users in Mexico will be approximately 118.1 million. Each smartphone has the functionality of sending and receiving SMS (Short Message Service) messages, which pose a significant threat to all users, as it makes any device vulnerable to a malware attack. In particular, worm-type malware takes advantage of this means of communication in order to spread. Studying the dynamics of malware propagation can help understand and prevent massive contagion between mobile devices. In this work, a model based on Network Automata and compartmental epidemiological models is presented, aiming to simulate, analyze and study the spread of worm-like malware through sending SMS on smartphones.

关键词： Cellular Automaton Malware Spread Complex Systems Network Automaton

A Coupled Variable Coefficient Modified KdV Equation Arising from a Two-Layer Fluid System

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Communications in Theoretical Physics 2007年第12期48卷 961-970页

作者： GAO Yuan~1 and TANG Xiao-Yan~(1,2)~1 Department of Physics,Shanghai Jiao Tong University,Shanghai 200240,China~2 Institut Für Theoretische Physik iv,Fakultt für Physik und Astronomie,Ruhr-Universitt Bochum,D-44870 Bochum,Germany Department of Physics Shanghai Jiao Tong University Institut Fur Theoretische Physik iv Fakultat fur Physik und Astronomie Ruhr-Universitat Bochum

A quite general coupled variable coefficient modified KdV (VCmKdV) equation in a two-layer fluid systemis derived by means of the reductive perturbation *** use of the CK's direct method,some similarityreductions of the coupled VCmKdV equation are obtained and their corresponding group explanations are *** exact solutions of the coupled equations are also presented.

关键词： coupled variable coefficient mKdV equation two-layer fluid similarity solution periodic waves