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In this work, a two-phase optimal-relay transmission scheme for relay networks against eavesdropper is proposed. The security and the reliability performance of this scheme are evaluated in the form of the intercept probability and the outage probability, respectively. In addition, the closed-form expression of security-reliability tradeoff (SRT) is obtained to show the compromise of the security...
In this study, Chlorophyll Fluorescence (ChlF) was used to assess and detect the onset of crop injury from glyphosate, the most widely used herbicide. Thirty-six pots of non-glyphosate-resistant soybean (cultivar FM955LL) were randomly divided into three groups and treated with different doses of glyphosate solutions. The three treatment groups were CTRL group (with no glyphosate treatment), 0.25X...
In this study, we use the variance based sensitivity method to analyze the sensitivities of the row crop model's input parameters. This method consists of three steps: sample generation, model execution and the calculation of sensitivity indices. The results of sensitivity analysis of row crop model's input parameters indicate that the sensitivities of the row model's parameters are different under...
Wireless Sensor Network (WSN) is an intelligent system on the integration of information collection, transmission and processing. However, the limited energy is the biggest constraint of WSN, because it is impossible for the power supply to recharge or replace in the networks. In this paper, an adaptive transmission strategy is proposed to achieve energy saving. This strategy comprehensively considers...
The structure of urban commerce zone is usually complicated and hard to be governed. Therefore, this paper analyzes every development process of the commerce zone from the view of life cycle evolution, and then determines the governance structure of urban commerce zone from the view of transaction cost of property. Finally the paper makes some relevant proposals.
Based on the data about sandstorm which come from 75 meteorological stations from 1960 ~ 2006 in Gansu Province, using the methods of wavelet analysis and correlation, The Seasonal Change Characteristics of Sandstorm in Gansu Province was analyzed. The results show: Seasonal sandstorm days have declined in recent 47 years, and they represent the 6-year and 9-year periodic oscillation by the wavelet...
This paper presents a fast, accurate, and novel method for the problem of estimating the number of humans and their positions from background differenced images obtained from a single camera where inter-human occlusion is significant. The problem is challenging firstly because the state space formed by the number, positions, and articulations of people is large. Secondly, in spite of many advances...
The general problem of object tracking can be modeled as a Markov process and solved by computing probability distributions of the possible object states, followed by MAP estimation. This paper presents a new framework for the efficient estimation of the probability distribution of the states. In contrast to particle filters, where the possible states are numerous and random, we limit the possible...
In this paper, a novel robust tracking algorithm in compressed video is proposed. Within the framework of video compression standards, we consider how to accurately estimate motion of an object by utilizing motion vectors available in compressed video together with derived confidence measures. These confidence measures are based on DCT coefficients, spatial continuity of motion and texture measure...
This paper presents a novel real-time DCT-based object tracking algorithm that operates on I frames in compressed MPEG video. Discrete cosine transform (DCT) coefficients that are provided from video sequences are exploited to find motion and color cues. The temporal motion and spatial color information are then fused by means of a posterior probability framework which allows the information from...
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