This paper firstly corrects a wrong result given by refernece [1],then gives the edge spans of L(2,1)-labeling and lambda-L(2,1)-labeling of the above two kinds of graphs,so the moving communication frequency assignment problem is completely solved.
With defer potential of harmonic fields in whole-space lossy medium, the closed expressions have been derived under quasi-static condition, which leads to analysis directivity of harmonic dipole antenna, field zones and relationships between field, earth resistivity, communication frequency and distance.
This system consists of a miniature RF transceiver inside the body and a data recorder outside the body. ISM band radio frequency(approx.433MHz) is used to achieve half duplex communication between the transceiver and the data recorder.
With increasing the frequency of SAW devices,both high power durability and strong adhesion of Al films are required. Mo additive was used to improve the anti-electromigration and power durability of Al films.
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.
Design, performances and application of the high frequency analog integrated phase-locked loop KD8041 are described in this paper. The PLL KD8041 consists of phase detector, voltage controled oscillation, low pass filter, amplifiers, vol. tage and current stabilizers, and temperature compendation network, etc. The operating frequency is 50MHz. It can be used in modern communications, frequency synthesis, automatic control and precision instrumentation, etc.
The modern information society continuously demands for larger communication capacities.These demands can be met by developing higher telecommunication frequencies.With this goal and modern communication technology basing on satellite systems with reflector antennas,a new structural design concept of a satellite antenna reflector as an adaptive structural system is being developed.In this article the manufacturing of such a parabolic central focus sandwich...
The modern information society continuously demands for larger communication capacities.These demands can be met by developing higher telecommunication frequencies.With this goal and modern communication technology basing on satellite systems with reflector antennas,a new structural design concept of a satellite antenna reflector as an adaptive structural system is being developed.In this article the manufacturing of such a parabolic central focus sandwich reflector of a diameter of 900mm with intermediate modulus carbon fibre/epoxy face sheets and aluminium honeycomb core with integrated actuators will be introduced.The fabrication of the actuator packages,the filament winding process and the assembly of the actuators will be presented.With this paper the authors intend to introduce this new design concept as a promising technique to realise lightweight,by means of active control thermally highly stable and economic reflector structures for future communicaiton applications.
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.
通讯频率
communication frequency
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