850 research outputs found
Quantum Robot: Structure, Algorithms and Applications
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
Investigation of electrical contact resistance for nonconductive film functionalized with Î -conjugated self-assembled molecules
©2007 American Institute of Physics. The electronic version of this article is the complete one and can be found online at: http://link.aip.org/link/?APPLAB/90/092102/1DOI:10.1063/1.2709638Nonconductive adhesive/nonconductive film (NCA/NCF) bonding technology has attracted increasing research interests as lead-free interconnect. During bonding, heat and pressure are applied and the direct physical contacts between the two surfaces of integrated circuit bump and substrate bond pad can be achieved. The electrical contact resistance of a NCA/NCF joint is controlled by the pressure, roughness and NCA/NCF material properties. An accurate prediction of contact resistance can help guide experiment setup towards improving the electrical performance of NCA/NCF. In this study, a model is developed and correlated to experiments. The effects of NCA/NCF material properties on electrical contact resistance are investigated
Sectional normalization and recognization on the PV-Diagram of reciprocating compressor
The shortcomings of familiar normalization method on the PV-Diagram of reciprocating compressor are analyzed in the paper. A sectional normalization method of the PV-Diagram was put forward, and a recognizing technique of fault characteristics based on support vector machines for cylinder and piston system in reciprocating compressor is introduced. Four sections of curve in the PV-Diagram indicate four stages of a gas compression cycle. After the PV-Diagram is normalized with the new method, the curvilinear curvatures are unchanged in comparison with the original diagram. The contour and shape relations between normal and fault state character curves are retained. The pressure signals collected from cylinder are normalized and treated as characteristic vectors, and the vectors are inputted into a multi-class classifier composed of many support vector machines in order to classify fault modes. The experimental results show that the method can identify faults of the cylinder and piston system more correctly
Constraining the cosmological parameters using gravitational wave observations of massive black hole binaries and statistical redshift information
Space-borne gravitational wave detectors like TianQin are expected to detect
GW signals emitted by the mergers of massive black hole binaries. Luminosity
distance information can be obtained from GW observations, and one can perform
cosmological inference if redshift information can also be extracted, which
would be straightforward if an electromagnetic counterpart exists. In this
paper, we concentrate on the conservative scenario where the EM counterparts
are not available, and comprehensively study if cosmological parameters can be
inferred through a statistical approach, utilizing the non-uniform distribution
of galaxies as well as the black hole mass-host galaxy bulge luminosity
relationship. By adopting different massive black hole binary merger models,
and assuming different detector configurations, we conclude that the
statistical inference of cosmological parameters is indeed possible. TianQin is
expected to constrain the Hubble constant to a relative error of about 4%-7%,
depending on the underlying model. The multidetector network of TianQin and
LISA can significantly improve the precision of cosmological parameters. In the
most favorable model, it is possible to achieve a level of 1.7% with a network
of TianQin and LISA. We find that without EM counterparts, constraints on all
other parameters need a larger number of events or more precise sky
localization of GW sources, which can be achieved by the multidetector network
or under a favorable model for massive black hole mergers. However, in the
optimistic case, where EM counterparts are available, one can obtain useful
constraints on all cosmological parameters in the Lambda-CDM cosmology,
regardless of the population model. Moreover, we can also constrain the
equation of state of the dark energy without the EM counterparts, and it is
even possible to study the evolution of EoS of the DE when the EM counterparts
are observed.Comment: 34 pages, 17 figures, update to match published versio
Control of non-controllable quantum systems: A quantum control algorithm based on Grover iteration
A new notion of controllability, eigenstate controllability, is defined for
finite-dimensional bilinear quantum mechanical systems which are neither
strongly completely controllably nor completely controllable. And a quantum
control algorithm based on Grover iteration is designed to perform a quantum
control task of steering a system, which is eigenstate controllable but may not
be (strongly) completely controllable, from an arbitrary state to a target
state.Comment: 7 pages, no figures, submitte
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