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通讯频率
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  communication frequency
    The L(2, l)-labeling Problem on Graphs and the Moving Communication Frequency Assignment Problem
    图的L(2,1)标号与移动通讯频率分配问题
短句来源
    An L (2,1) labeling of a graph G is a function f from the vertex set V(G) to the set of all nonnegative integers such that |f(x)-f(y)|2 if d(x,y) =1 and |f(x)-f(y)| 1 if d(x,y) =2.The moving communication frequency assignment problem can be transformed into an L(2,1) labeling problem on a graph.
    图G的L(2 ,1 )标号是一个从顶点集V(G)到非负整数集的函数f(x) ,使得若d(x ,y) =1 ,则|f(x) -f(y) | 2 ; 若d(x ,y) =2 ,则 |f(x) -f(y) | 1 .移动通讯频率分配问题可以转化为图的L(2 ,1 )标号问题 .
短句来源
    An L(2,1)-labeling of a graph G is a function,from the vertex set V(G)to theset of all nonnegative integers such that |f(x)-f(y)|≥2 if d(x,y)=1 and |f(x)-f(y)|≥1 if d(x,y)=2.The moving communication frequency assignment problem canbe transformed into an L(2,1)-labeling problem on a graph.
    图G的L(2,1)标号是一个从顶点集V(G)到非负整数集的函数f(x),使得若d(x,y)=1,则|f(x)-f(y)|≥2; 若d(x,y)=2,则|f(x)-f(y)|≥1.移动通讯频率分配问题可以转化为图的L(2,1)标号问题.
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  communication frequency
HF detecting radar and communication frequency selection system
      
Most mothers reported having communicated with their home visitor about the three risk areas, but there were no differences in communication frequency based on whether services were needed.
      
Acoustic analysis shows that the optimal communication frequency is inversely proportional to about the 0.4 power of the animal's body mass.
      
For parallel programs, communication frequency, communication bandwidth and serialization complicate the situation further.
      
In other words, the communication frequency is high amongst neighbors and high overheads are far less tolerable.
      
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An L (2,1) labeling of a graph G is a function f from the vertex set V(G) to the set of all nonnegative integers such that |f(x)-f(y)|2 if d(x,y) =1 and |f(x)-f(y)| 1 if d(x,y) =2.The moving communication frequency assignment problem can be transformed into an L(2,1) labeling problem on a graph.The 2 lattice and relative graph are extended to the n lattice and relative graph,and the L(2,1) labelings of the n lattice and relative graph are given.

图G的L(2 ,1 )标号是一个从顶点集V(G)到非负整数集的函数f(x) ,使得若d(x ,y) =1 ,则|f(x) -f(y) | 2 ;若d(x ,y) =2 ,则 |f(x) -f(y) | 1 .移动通讯频率分配问题可以转化为图的L(2 ,1 )标号问题 .将 2 格图及相关图推广到n 格图及相关图 ,并给出了它们的L(2 ,1 )标号 .

An L(2,1)-labeling of a graph G is a function,from the vertex set V(G)to theset of all nonnegative integers such that |f(x)-f(y)|≥2 if d(x,y)=1 and |f(x)-f(y)|≥1 if d(x,y)=2.The moving communication frequency assignment problem canbe transformed into an L(2,1)-labeling problem on a graph.In this paper we firstlygive an L(2,1)-labeling of a plane lattice graph,and then get an L(2,1)-face labelingof a plane near regular hexagon subdivision graph by the L(2,1)-labeling of the planelattice and relative graphs,so...

An L(2,1)-labeling of a graph G is a function,from the vertex set V(G)to theset of all nonnegative integers such that |f(x)-f(y)|≥2 if d(x,y)=1 and |f(x)-f(y)|≥1 if d(x,y)=2.The moving communication frequency assignment problem canbe transformed into an L(2,1)-labeling problem on a graph.In this paper we firstlygive an L(2,1)-labeling of a plane lattice graph,and then get an L(2,1)-face labelingof a plane near regular hexagon subdivision graph by the L(2,1)-labeling of the planelattice and relative graphs,so we completely solve the moving communication frequencyassignment problem.

图G的L(2,1)标号是一个从顶点集V(G)到非负整数集的函数f(x),使得若d(x,y)=1,则|f(x)-f(y)|≥2;若d(x,y)=2,则|f(x)-f(y)|≥1.移动通讯频率分配问题可以转化为图的L(2,1)标号问题.本文首先给出平面格子图的L(2,1)标号,然后通过平面格子图及相关图的L(2,1)标号得到平面近正六边形剖分图的L(2,1)面标号,从而解决了移动通讯的频率分配问题.

 
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