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In this paper, we propose a 2-dimension bearing estimation method based on spatial time-frequency analysis. We generalize spatial power spectrum based on wavelet transform (SPS-WT) to 3-dimension space. By analyzing the relationship between the wavelet transform of the frequency invariant beam's output and the array's beampattern, we derived SPS-WT in 3-dimension space. The method has good performance...
Holographic reconstruction is an inversion method with which the sound radiation characteristics of the sound source can be reconstructed by using nearfield acoustic holography. In this paper, the sound field holographic reconstruction method is researched based on the sound field reconstruction model of nearfield acoustic holography. Using MATLAB and LabVIEW virtual instrument software platform,...
Quantum computation and quantum information have recently become an extensively studied topic. In this paper, we give some matrix expressions and transformation method for 2-level quantum logic gates, which can make implementation of 2-level quantum logic gates easily and improve the efficiency of binary quantum circuit synthesis.
Because it has the ability to avoid energy losses and the possibility to solve some exponentially hard problems in polynomial time, quantum computation is getting more and more attention. Multi-valued logic for quantum computing has shown practical advantages for scaling up a quantum computer. In this paper, some reversible logic gates for the multi-valued quantum logic and some synthesis methods...
Parallel coordinates is a very important visualization method, but the dimensions it can express are limited by the length or width of the screen. In this paper, we present the polar parallel coordinates method. First, we define the polar parallel coordinates as the coordinate whose axes exist between the same degree and show the expression of the axis. We give the algorithms for the polar parallel...
This paper builds up the model of the multicarrier direct sequence-code division multiple access (MC DS-CDMA) system with time reversal space-time block coding (TR-STBC) transmit diversity, based on which steepest decreasing constant modulus algorithm (SDCMA) for blind equalization is studied. Simulations are performed and the conclusions are given. The conclusions show that the blind equalization...
A city natural gas storage station control system is presented in this paper. It consists of a Station Control Center, a process control station used Rockwell PLC, two desiccators control station used Ormon PLC, three high pressure compressors control station used Siemens PLC, Ethernet communication between supervise control computer and Rockwell PLC, RS 485 communication among the Siemens and Ormon...
The steam and water system of boiler is always divided into a drum level control system and a main steam temperature control system independently. The coupling is existed actually between these two loops, but it is often ignored by engineer or system designer. In this paper, the coupling between the drum level control system and the main steam temperature control system is determined by the controlled...
In the converter steelmaking vaporized cooling process, the serious ldquofalse water levelrdquo phenomenon appears at the drum water level of waste heat recovery boiler as the gas is burnt completely. According to the energy conversation law, a steam flow feed-forward compensator is designed as the open-loop controller to improve the previous control system. It is used to overcome the great nonlinearity...
The furnace combustion system of circulating fluidized bed boiler (CFBB) must ensure the steam pressure as a constant via controlling the coal quantity and wind flow. Another important role is to avoid the temperature varying excessively which will result in the high temperature agglomeration or low temperature agglomeration in boiler. Based on the model and characteristic analysis of combustion system,...
With the development of industrial automation, more and more ZigBee network was applied. The security of ZigBee network becomes more important. Chaotic sequence, which possesses pseudo-randomness naturally, can be used for data encryption as stream cipher. Based on chaotic theory and starting from the angle of application, this paper offers a compound chaotic cryptographic system, which is based on...
In this paper, the model of piezo-valve type electric-pneumatic valve positioner is established based on the motion equation, the ideal air equation, the energy equation, and the Newton's Second law. It takes into consideration the friction force in piston seals, the change of active volume due to the piston moving, leakage at the positioner, dynamics and flow nonlinearities through the positioner...
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