The Wigner-Araki-Yanase theorem puts a limitation on the measurement of observables in the presence of a conserved quantity, and the notion of Wigner-Yanase skew information quantifies the amount of information on the values of observables not commuting with the conserved quantity. We demonstrate that the statistical idea underlying the skew information is the Fisher information in the theory of statistical estimation. A quantum Cramer-Rao inequality and a new uncertainty relation in terms of the skew information are established, which shed considerable new light on the relationships between quantum measurement and statistical inference. The result is applied to estimating the evolution speed of quantum states.

Wigner-Yanase skew information and uncertainty relations.

Digital video data, stored in video databases and distributed through communication networks, is subject to various kinds of distortions during acquisition, compression, processing, transmission, and reproduction. For example, lossy video compression techniques, which are almost always used to reduce the bandwidth needed to store or transmit video data, may degrade the quality during the quantization process. For another instance, the digital video bitstreams delivered over error-prone channels, such as wireless channels, may be received imperfectly due to the impairment occurred during transmission. Package-switched communication networks, such as the Internet, can cause loss or severe delay of received data packages, depending on the network conditions and the quality of services. All these transmission errors may result in distortions in the received video data. It is therefore imperative for a video service system to be able to realize and quantify the video quality degradations that occur in the system, so that it can maintain, control and possibly enhance the quality of the video data. An effective image and video quality metric is crucial for this purpose.

/pdf/41-objective-video-quality-assessment-4lgofrzmrv.pdf

41 objective video quality assessment

In the theory of general relativity time flows at different rates depending on the space–time geometry. Here, a drop in the visibility of a quantum 'clock' interference in a gravitational potential is predicted, which cannot be explained without the general relativistic notion of time.

/pdf/quantum-interferometric-visibility-as-a-witness-of-general-1678p1demc.pdf

Quantum interferometric visibility as a witness of general relativistic proper time

Between a movable core chamber and a fuel supply passage, a needle guide slidably supports a needle fixed to a movable core. The needle guide has a communication hole which fluidly connects the movable core chamber and the fuel supply passage. An opening sectional area of the communication hole is defined in such a manner that a fuel discharged amount decreases as an energization start time of a coil is delayed. In a suction stroke, it is restricted that the movable core and the needle bounce toward the fixed core after the needle biases a suction valve toward a stopper by means of a biasing force of a second spring. A relationship between the energization start time of the coil and the fuel discharged amount is properly maintained, so that the fuel discharged amount of the high-pressure pump can be controlled correctly.

High pressure pump

Apparatus and methods of using content information for encoding multimedia data are described. A method of processing multimedia data includes classifying content of multimedia data, and encoding the multimedia data in a first data group and in a second data group based on the content classification, wherein the first data group comprises a coefficient and the second data group comprises a first differential refinement associated with the first data group coefficient. An apparatus for using content information for encoding multimedia data includes a content classifying module configured to classify content of multimedia data and provide content classification data, and an encoder configured to encode the multimedia data in a first data group and in a second data group based on the content classification, wherein the first data group comprises a coefficient and the second data group comprises a first differential refinement associated with the first data group coefficient.

Scalability techniques based on content information

A valve body (73) opens when pressure in chest valve (39) is reduced, by displacing in direction where pistons (43,44) spaces apart. The valve body closes by displacing in adjoining direction of pistons with respect to urging force of working fluid flowing backwards in supply channel (38). An independent claim is also included for an injector.

Driving force transmission apparatus for injector used in diesel engine, has valve body which opens when pressure in chest valve is reduced by displacing in direction where pistons spaces apart

PROBLEM TO BE SOLVED: To provide a building construction method capable of shortening a construction period, and an underground skeleton of a new buildingSOLUTION: In a building construction method for building a new building 2 by utilizing an existing building 1 with an n-storied subsurface section (n is a natural number equal to or more than 2), a ground skeleton of the existing building 1 is demolished and new underground columns 23 are constructed while existing underground slabs 14 in a section from a subsurface first story to a subsurface n-1-th story of the existing building are left An underground skeleton of the new building 2 is constituted of: the existing underground slabs 14 of the subsurface n stories of the existing building; a temporary concrete bottom plate 21a provided on the existing underground slabs; a new reinforced-concrete bottom plate 21b provided on the temporary concrete bottom plate; new underground columns 23 raised from the existing underground slabs; and new underground slabs 24 connected to an existing underground external wall 10 The underground columns are embedded in the new bottom plate in a foot protecting manner

Building construction method, and underground skeleton of new building

Structure de coulissement dans laquelle une tige est retenue de maniere a pouvoir coulisser dans un trou de guidage, l'absence de film d'huile resultant du contact du bord de la tige a laquelle une charge de poussee dans la direction axiale est appliquee etant empechee. Compte tenu du fait que les extremites (25c1) et (25c2), qui sont toujours de maniere coulissante au contact d'une surface laterale (1232a) d'un trou de guidage (1232) d'une surface laterale (25c) d'une tige (251), constituent partiellement le bord, plusieurs gorges en labyrinthes (2501) et (2502) sont formees respectivement aux extremites (25c1) et (25c2), il est de ce fait possible pour un film d'huile de couvrir toute la partie de contact sans une tres grande augmentation de la largeur des gorges. Comme la largeur des gorges n'est pas tres fortement accrue, la longueur des parties concernees par le coulissement peut etre assuree.

Structure de coulissement pour tige a resistance amelioree a l'abrasion et injecteur

We find a quantum mechanical formulation of proper time for spin 1/2 particles within the framework of the Dirac theory. It is shown that the rate of proper time can be represented by an operator called the ` ` tempo operator'', and that the proper time itself be given by the integral of the expectation value of the operator. The tempo operator has some terms involving the Pauli spin matrices, and the evolution of the proper time is influenced by the spin state via these terms. The relation between the tempo operator and the metric tensor is elucidated.

Proper Time for Spin 1/2 Particles

Vorrichtung zur Überwachung der Qualität eines übertragenen Bilds

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