In order to successfully transform coking technology of moisture-free coal, which has energy conservation and environmental protection properties into production, moisture effects on coking course of coal was researched and the caking indices; plastometric indices, Gieseler fluidity, and coke optical texture of coking coal under different moisture proportions were studied. The result showed that when the moisture proportion of charging coal was decreased, the voids among coal particle minished. The size and proportion of pores produced by moisture’s volatilization declined, the expansion pressure produced in coking course increased and inborn plastometric layer’s spreading property was improved. All these made caking indices of coking coal take on increasing trend. They also made the shrinking value x decrease, the solid-soft interval increase, the fluidity and the spreading property of layer among anthracite be improved and coke tight property be improved. These provided many useful conditions for coke with good quality and the decrease of coking wastewater.
Due to the limitation of the measurement accuracy of classical radio signals, the time comparison accuracy can only reach ns level. In this paper, a time comparison scheme of Beidou system based on microwave-optical entangled signal is proposed, which effectively combines the long-distance transmission advantage of microwave signal with the single photon detection advantage of optical signal by electro-opto-mechanical converter, and the phase difference is solved by a phase conjugate processor ,so as to calculate the accurate time difference information. Through theoretical analysis and simulation, it is proved that even if the quantum signal is under the condition of low entanglement degree, the proposed scheme can improve the time comparison accuracy to the ps level.
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