14,532 research outputs found

    Quantum Robot: Structure, Algorithms and Applications

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    A kind of brand-new robot, quantum robot, is proposed through fusing quantum theory with robot technology. Quantum robot is essentially a complex quantum system and it is generally composed of three fundamental parts: MQCU (multi quantum computing units), quantum controller/actuator, and information acquisition units. Corresponding to the system structure, several learning control algorithms including quantum searching algorithm and quantum reinforcement learning are presented for quantum robot. The theoretic results show that quantum robot can reduce the complexity of O(N^2) in traditional robot to O(N^(3/2)) using quantum searching algorithm, and the simulation results demonstrate that quantum robot is also superior to traditional robot in efficient learning by novel quantum reinforcement learning algorithm. Considering the advantages of quantum robot, its some potential important applications are also analyzed and prospected.Comment: 19 pages, 4 figures, 2 table

    The Possible J^{PC}=0^{--} Exotic State

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    In order to explore the possible existence of the exotic 0βˆ’βˆ’0^{--} state, we have constructed the tetraquark interpolating operators systematically. As a byproduct, we notice the 0+βˆ’0^{+-} tetraquark operators without derivatives do not exist. The special Lorentz structure of the 0βˆ’βˆ’0^{--} currents forbids the four-quark correction to the spectral density. Now the gluon condensate is the dominant power correction. Within the framework of the finite energy sum rule, none of the seven interpolating currents supports a resonant signal. Therefore we conclude that the exotic 0βˆ’βˆ’0^{--} state does not exist below 2 GeV, which is consistent with the current experimental observations.Comment: 12 pages, 27 figure

    On reduced-order filter design for uncertain cascaded 2-1 sigma-delta modulators

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    [[abstract]]In this paper, we present a new robust matching filter design method for uncertain 2-1 cascaded sigma-delta modulators. This method addresses a well known limitation of H-infinity loop shaping techniques that they yield filters of high order (equal to the sum of the plant order and the order of the weighting function), thus increasing the complexity of circuit implementation. In contrast, the new method yields filters whose order is equal to the plant order, independent of the weighting function. We compare the new method with other existing fixed-order designs, and establish its efficacy.[[conferencetype]]εœ‹ιš›[[conferencedate]]20110608~20110610[[iscallforpapers]]Y[[conferencelocation]]Maca

    Chest Compression-Only Cardiopulmonary Resuscitation

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    The survival rate of out-of-cardiac arrest (OHCA) was very low, which was mainly due to the victims who do not receive cardiopulmonary resuscitation (CPR) immediately. It was estimated that if people who quickly get chest compression-only CPR while awaiting medical treatment have double or even triple the chance of surviving. In the true world, many individuals are unwilling to do mouth-to-mouth breathing due to fear of infections or unable to do mouth-to-mouth breathing at the same time in the situation of only one bystander. This article has performed an extensive review in order to update the concept of chest compression-only CPR
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