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智能优化算法 神经网络预测 雷达通信 无线传感器
信号处理 图像处理 路径规划 元胞自动机 无人机 电力系统
⛄ 内容介绍
无线传感器网络集成了传感器技术、微机电技术和网络通信技术,是一种全新的信息获取和处理技术,具有广阔的应用前景。然而在包括定位技术在内的一些关键技术上,仍然存在着很多问题,这些问题的提出和解决对于无线传感器网络理论和应用的研究有着十分重要的意义。 节点定位问题是无线传感器网络组网和应用的关键问题。
⛄ 部分代码
clear;
%----------------------------------------- PARAMETERS -----------------------------%
xm=400; %diameters of sensor network
ym=400;
sink.x=50; %distance of base station from the network
sink.y=50;
n = 100; %no of nodes
p=0.1; %probibilty of a node to become cluster head
Eo=0.5; %energy supplied to each node
ch=n/10;
ETX=50*0.000000001; %transmiter energy per node
ERX=50*0.000000001; %reciever energy per mode
Efs=10*0.000000000001; %amplification energy when d is less than d0
Emp=0.0013*0.000000000001; %amplification energy when d is greater than d0
Efs1=Efs/10; % amp energy just for intra cluster communication.
Emp1=Emp/10;
%Data Aggregation Energy
EDA=5*0.000000001;
a=Eo/2; %?
rmax=1000; %no of rounds
%temprature range
tempi=50;
tempf=200;
%----------------------------------END OF PARAMETERS -----------------------------%
do=sqrt(Efs/Emp); %distance between cluster head and base station
do1=sqrt(Efs1/Emp1);
for i=1:1:n
S(i).xd=rand(1,1)*xm; %it will distribute the nodes in 1 dimension in x axis randomly.
XR(i)=S(i).xd; %we store its value in xr
S(i).yd=rand(1,1)*ym; %it will distribute the nodes in 1 dimension in y axis randomly
YR(i)=S(i).yd;
S(i).G=0; % as the no of node that have been cluster head is zero 0
S(i).E=Eo;%%*(1+rand*a); %?
%ch.E=x; % initial energy of all cluster heads in network
%initially there are no cluster heads only nodes
S(i).type='N';
end
S(n+1).xd=sink.x; %assume that base station is also a node sp total no of nodes is n and with base station it is n+1
S(n+1).yd=sink.y;
for i=1:1:n
node_distance(i)=sqrt((S(i).xd-(sin.x))^2+(S(i).yd-(sink.y))^2);
end
%counter for CHs
countCHs=0;
%counter for CHs per round
rcountCHs=0;
cluster=1;
countCHs;
rcountCHs=rcountCHs+countCHs;
flag_first_dead=0;
for i=1:1:n
if(node_distance(i)>do)
S(i).E=S(i).E- ( (ETX+EDA)*(4000) + Emp*4000*(node_distance(i)*node_distance(i)*node_distance(i)*node_distance(i) ));
else
S(i).E=S(i).E- ( (ETX+EDA)*(4000) + Efs*4000*( node_distance (i)* node_distance(i) ));
end
for r=1:1:rmax
if(S(i).E>=Eavg)
S(i).type='Y';
end
end
end
⛄ 运行结果
⛄ 参考文献
[1]陈轶林. 基于Mobile Sink的无线传感器网络能量均衡算法研究.
[2]李婷雪. 基于多维标度和距离校正技术的无线传感器网络定位研究[D]. 天津大学, 2009.
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