Kabushiki Kaisha Toshiba

Hitachi, Ltd.

Taichi Isogai

Yoshikazu Hanatani

Hirofumi Muratani

Tomoko Yonemura

Kenichiro Furuta

Yuichi Komano

Kenji Ohkuma

Atsushi Shimbo

Hanae Ikeda

Satoshi Ito

Tomoyuki Nakamura

Hideyuki Aisu

Shinji Yamanaka

Tomoshi Otsuki

Masatake Sakuma

Yasutaka Kimura

Yuki Kagawa

Ryo Yano

Yoshimasa Tada

Mitsuo Tsurugai

Nobuaki Sano

Toshiyuki Fujikawa

Hyogo Takami

According to one embodiment, a storage battery control device includes a first reception unit, a second reception unit, a calculation unit, a generation unit, and a transmission unit. The first reception unit receives a charge and discharge command from a power management device. The second reception unit receives a current electricity storage state from each of storage batteries. The calculation unit calculates a control amount, which indicates a ratio of the current electricity storage state in an operation range, with respect to each of the storage batteries on the basis of the current electricity storage state and the operation range of the electricity storage state. The generation unit generates a charge and discharge output value, which is an output value of charge and discharge for the each of the storage batteries, on the basis of the control amount and the charge and discharge command, the control amount calculated for each of the storage batteries, the charge and discharge command received by the first reception unit. The transmission unit transmits the charge and discharge output value to each of the storage batteries, the charge and discharge output value generated by the generation unit.

Storage battery control device and storage battery control method

A method and device for operating a power system, and a rechargeable-battery management device that extracts maximum performance from rechargeable batteries and uses the batteries evenly while taking into consideration cost and the operation of the batteries are provided. According to the method for operating a power system provided with a plurality of rechargeable-battery devices and a plurality of electric generators, the amount of power that a rechargeable battery available during a scheduled time period on a scheduled date will be able to supply is determined, an economic-dispatch calculation including the determined amount of power that the aforementioned rechargeable battery will be able to supply is performed for the power system, and the rechargeable battery is used to supply power during the scheduled time period on the scheduled date.

Method and device for operating power system, and rechargeable-battery management device

An example information processing device includes first and second receiving units, a deciding unit, and first and second transmitting units. The first receiving unit receives adjustment limit information from a plurality of first external devices. The deciding unit determines adjustment rules on the basis of the adjustment limit information. The first transmitting unit transmits the adjustment rules to second and third external devices. The second receiving unit receives determination information from a fourth external device. The second transmitting unit transmits the adjustment rules to the first external devices when integrated schedule information satisfies a condition. When the integrated schedule information does not satisfy the condition, the deciding unit changes the adjustment rules. When the deciding unit has changed the adjustment rules, the first transmitting unit transmits new adjustment rules to the second and third external devices.

Information processing device and power use adjustment system

According to one embodiment, a decompressing apparatus includes an input unit, a calculating unit, a first selecting unit, and a decompressing unit. The input unit inputs additional data, which is obtained based on trace expression data in which an element in a subgroup of a multiplicative group of a finite field is trace-expressed and affine expression data in which the trace expression data is affine-expressed, and the trace expression data. The calculating unit calculates a plurality of solutions of simultaneous equations derived by the trace expression data. The first selecting unit selects any of a plurality of items of affine expression data in which the element is affine-expressed based on the additional data, the affine expression data being found from the solutions. The decompressing unit decompresses the selected affine expression data to the element.

Decompressing apparatus and compressing apparatus

An arithmetic device includes an input unit inputting data that are elements of a group; a converting unit is configured, when the input data are in a second representation, to convert the input data into a first representation and to perform arithmetic operation on the converted first representation using an operand in the first representation in which at least one subcomponent is a zero element to convert the converted first representation into first converted data expressed in the first representation, and when the input data are in the first representation, to perform arithmetic operation on the input data using the operand in the first representation in which at least one subcomponent is a zero element to convert the input data into second converted data expressed in the first representation; and an operating unit that performs arithmetic processing on the first or the second converted data using secret information.

Arithmetic device, method, and program product

According to one embodiment, a representation converting unit converts a set of n elements (h, h, . . . , h) (h: a member of a finite field F, 0&#x2266;i&#x2266;n&#x2212;1) that is a projective representation of a member g of an n-th degree algebraic torus T(F) (n: positive integer, p: prime number, m: positive integer) into a limited projected representation expressed by a set of n elements (h', h&#x2032;, . . . , h&#x2032;) (h&#x2032;: a member of the finite field F, 0&#x2266;i&#x2266;n&#x2212;1) in which at least one element out of the n elements is a zero element 0 or an identity element 1. An arithmetic unit omits part of Foperation that is arithmetic operation in the finite field Fbased on a fact that an element in the set of n elements (h&#x2032;, h&#x2032;, . . . , h&#x2032;) represented by the limited projective representation is a zero element '0' or an identity element '1' when performing Foperation that is arithmetic operation of a finite field Fin combination with the Foperation.

Arithmetic device

A compressing unit compresses an element on an algebraic torus into affine representation according to a compression map. A determining unit determines whether a target element on the algebraic torus to be compressed is an exceptional point representing an element on the algebraic torus that cannot be compressed by the compression map. The compressing unit generates, when it is determined that the target element is the exceptional point, a processing result including exceptional information indicating that the target element is the exceptional point, and generates, when it is determined that the target element is not the exceptional point, a processing result including affine representation obtained by compressing the target element according to the compression map.

Apparatus for performing data compression processing using algebraic torus

In a computing device that calculates a square of an element in a finite field, a vector representation of the element in the finite field is accepted. The vector representation includes a plurality of elements. The computing device performs a multiplication operation on a base field using the accepted elements, and obtains a multiplication value. The multiplication operation is determined by a condition under which the element in the finite field is placed in an algebraic torus. The computing device performs an addition and subtraction operation using the obtained multiplication value and the accepted elements, and obtains a calculation result of the square of the element. The addition and subtraction operation is determined by the condition. The computing device then outputs the calculation result.

Exponentiation calculation apparatus and method for calculating square root in finite extension field

When converting an affine representation representing a 2r-th degree algebraic torus T(F) (r is a prime number, and q is an integer) to a projective representation representing a quadratic algebraic torus T(F), a representation converting apparatus acquires member (c, c, . . . , c), (cis a member of a finite field F, where 0&#x2266;i&#x2266;r&#x2212;2) of a 2r-th degree algebraic torus T(F) represented by the affine representation. The apparatus performs a multiplication operation on the acquired member. The multiplication operation is determined by a condition under which a member of a quadratic algebraic torus T(F) is included in the 2r-th degree algebraic torus T(F), a modulus and a base of a quadratic extension, and a modulus and a base of an r-th degree extension. The representation converting apparatus then performs an addition and subtraction operation determined by the condition, the moduli, and the bases.

Representation converting apparatus, arithmetic apparatus, representation converting method, and computer program product

An encryption processing unit executes an arithmetic operation decided in advance and outputs an arithmetic result as an element on an algebraic torus. A compressing unit outputs, when the arithmetic result is an exceptional point representing an element on the algebraic torus that cannot be compressed by a compression map for compressing an element on the algebraic torus into affine representation, a compression result obtained by compressing the arithmetic result according to the compression map and outputs, when the arithmetic result is the exceptional point, an element belonging to a specific set decided in advance that does not overlap a set to which a compression result obtained by compressing the arithmetic result, which is not the exceptional point, belongs.

Apparatus and computer program product for performing data compression processing using algebraic torus

A digital watermark detection apparatus detects a watermark value from a motion image in which a topological invariant is embedded as the watermark value. The digital watermark detection apparatus includes a watermark component extracting unit which extracts each watermark component from the motion image; an average value computing unit which computes an average value of component values of pixels included in the watermark component; an identified watermark component determination unit which determines whether or not the watermark component is an identified watermark component to be utilized in identifying an arrangement unit of a plurality of watermark components based on the average value; a watermark component identifying unit which identifies the watermark component except for the identified watermark component; and a watermark value computing unit which computes the watermark value based on the identified watermark component and the watermark components except for the identified watermark component.

Apparatus, method, and program product for detecting digital watermark

A digital watermark embedding apparatus includes a watermark providing unit configured to provide a digital watermark, an obtaining unit configured to obtain an image component from a plurality of frames of video contents based on image data of the plurality of frames, the image component affecting an error occurring at a time of detecting an image pattern of the digital watermark, a generating unit configured to generate a first image pattern and a second image pattern in converse relation, using the image pattern of the digital watermark and the image component, and an overlapping unit configured to overlap the first image pattern and the second image pattern the frames on the frames, respectively, to eliminate or reduce the image component.

Digital watermark embedding apparatus and method, and digital watermark detection apparatus and method

An apparatus for embedding digital watermark information in an image, includes an image divider dividing the image into a plurality of partial images; and an embedder embedding in each of the partial images a digital watermark which indicates the digital watermark information. The digital watermark includes a plurality of watermark elements arranged in a sequence which is different for each of the partial images.

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Tokyo, Japan

Taichi Isogai