The occurrence of‘sensing holes’not only hinders seamless data col-lection but also leads to misinterpretation of information in certain areas under extensive data analysis.In order to overcome this,various sensor r...The occurrence of‘sensing holes’not only hinders seamless data col-lection but also leads to misinterpretation of information in certain areas under extensive data analysis.In order to overcome this,various sensor relocation stra-tegies have been proposed,but the existing relocation strategies revealed pro-blems such as the ping-pong,shaded area,network disconnection,etc.This paper conducted research on relocation protocols in a distributed environment that is very suitable for real-world situations and efficiently recovering the problem of sensing holes.First,a simulation was performed on the distribution of the shaded area for data collection,which is a problem with the existing representative relo-cation protocol.After that,a data collection capability was newly added to the relay node,which had been in charge of only communication between cluster zones so far,and with this additional functionality,the performance of the revised sensor relocation algorithm was dramatically improved to overcome the existing problems.In addition,the performance and validity of the proposed algorithm were verified through various simulations.展开更多
Local inhomogeneity in totally asymmetric simple exclusion processes （TASEPs） with different hopping rates was studied. Many biological and chemical phenomena can be described by these non-equilibrium processes. A s...Local inhomogeneity in totally asymmetric simple exclusion processes （TASEPs） with different hopping rates was studied. Many biological and chemical phenomena can be described by these non-equilibrium processes. A simple approximate theory and extensive Monte Carlo computer simulations were used to calculate the steady-state phase diagrams and bulk densities. It is found that the phase diagram for local inhomogeneity in TASEP with different hopping rates p is qualitatively similar to homogeneous models. Interestingly, there is a saturation point pair （a＊, fl＊） for the system, which is decided by parameters p and q. There are three stationary phases in the system, when parameter p is fixed （i.e., p=0.8）, with the increase of the parameter q, the region of LD/LD and HD/HD phase increases and the HD/LD is the only phase which the region shrinks. The analytical results are in good agreement with simulations.展开更多
文摘为了寻找最佳跳频调制方式,通过分析各种调制方式下不同信噪比对误码率的影响和不同BT值对GM-SK(Gauss filtered Minimum Shift frequency Keying)调制系统误码率的影响,说明GMSK调制方式的合理性和必要性。经仿真得出,在低信噪比-4 dB条件下,系统选用GMSK方式可获得0.03%的误码率,优于2FSK(2-ary Frequency Shift Keying)(3.33%),略差于BPSK(Binary Phase Shift Keying)(0.017%)和MSK(MinimumShift frequency Keying)(0.02%);同时频带利用方面GMSK为最优。利用Matlab中的Simulink通信工具箱模拟仿真GMSK跳频信号的调制与解调过程,设计出一种GMSK跳频通信系统。测试结果表明,该系统可在没有差错控制的条件下得到误码率为0.5%的通信效果。
基金supported by Incheon National University Research Grant in 2021(2021-0295).
文摘The occurrence of‘sensing holes’not only hinders seamless data col-lection but also leads to misinterpretation of information in certain areas under extensive data analysis.In order to overcome this,various sensor relocation stra-tegies have been proposed,but the existing relocation strategies revealed pro-blems such as the ping-pong,shaded area,network disconnection,etc.This paper conducted research on relocation protocols in a distributed environment that is very suitable for real-world situations and efficiently recovering the problem of sensing holes.First,a simulation was performed on the distribution of the shaded area for data collection,which is a problem with the existing representative relo-cation protocol.After that,a data collection capability was newly added to the relay node,which had been in charge of only communication between cluster zones so far,and with this additional functionality,the performance of the revised sensor relocation algorithm was dramatically improved to overcome the existing problems.In addition,the performance and validity of the proposed algorithm were verified through various simulations.
基金Project(2011FZ050) supported by Applied Basic Research Program of Yunnan Provincial Science and Technology Department,ChinaProject(2011J084) supported by Master Program of Yunnan Province Education Department,China
文摘Local inhomogeneity in totally asymmetric simple exclusion processes （TASEPs） with different hopping rates was studied. Many biological and chemical phenomena can be described by these non-equilibrium processes. A simple approximate theory and extensive Monte Carlo computer simulations were used to calculate the steady-state phase diagrams and bulk densities. It is found that the phase diagram for local inhomogeneity in TASEP with different hopping rates p is qualitatively similar to homogeneous models. Interestingly, there is a saturation point pair （a＊, fl＊） for the system, which is decided by parameters p and q. There are three stationary phases in the system, when parameter p is fixed （i.e., p=0.8）, with the increase of the parameter q, the region of LD/LD and HD/HD phase increases and the HD/LD is the only phase which the region shrinks. The analytical results are in good agreement with simulations.
