Mitsubishi Electric Corporation

International Business Machines Corporation

Bridgestone Corporation

Bridgestone Tire Company Limited

Other

Shimadzu Corporation

Fuji Jukogyo Kabushiki Kaisha

Taiyo Yuden Co., Ltd.

Shingo Kato

Matahiko Ikeda

Yuya Tanaka

Takayuki Sato

Ryota Kondo

Noriyuki Wada

Kotaro Nakano

Takashi Kaneyama

Katsuhiko Tsunoda

Mai Nakada

Akinu Nakabayashi

Ryo Kamimura

Ryoju Kamada

Nobuhiro Kihara

Masato Yoshikawa

Yoshihiko Kimpara

Masahiro Iezawa

Yoshihide Fukahori

Isao Matsuda

Tadashi Utsunomiya

Masahiro Ishizuka

Setsuo Akiyama

Fumi Hara

Takuo Kodaira

Naoki Nishimura

Naoyuki Nishimura

Hiroshi Takada

Shinya Kawanaka

Takeshi Otsu

Sotaro Miyano

Hideaki Kawamoto

Motomitsu Hagiwara

Shinji Saitoh

Hitoshi Kumagai

Yoshitaka Matsumoto

Sakae Inoue

Setsuko Miyanari

Tomonori Yamada

Fumio Hamada

Raymond Harry Putra Rudy

Yukio Ando

Akimasa Miyata

Noritaka Adachi

Tomoyuki Taniguchi

Takayasu Daikohara

Nobuhiko Iki

Yoshihiro Sugawa

Mitsuharu Hasegawa

Shingo Iizumi

Hideo Nakauchi

Naruaki Masuno

Toyohisa Fujimoto

Yoshiyuki Hiraishi

Ko Inamura

Nobukazu Takano

Narimitsu Yoshii

Masanao Ieyoshi

Tsutomu Takada

Hiroki Kurahashi

Tetsuya Shimizu

To provide a controller for power conversion circuit which can maintain the detection value of second voltage at the target value of second voltage without depending on feedback control, when the first voltage is varied. A controller for power conversion circuit changes a control value by feedback control so that the detection value of second voltage approaches a target value of second voltage; calculates a control value for control, by correcting the control value based on the detection value of first voltage so as to correct, in feedforward manner, a change of the control value due to a change of the first voltage if correction of the control value is not performed; and controls on/off the switching device based on the control value for control.

Power conversion circuit controller with feedforward correction

An output voltage of a plurality of chopper circuits is controlled by the average value of ON duties of their respective semiconductor switching elements so that there are provided a shunt controller which detects respective reactor currents of the plurality of chopper circuits and carries out shunt control based on the detected reactor currents and a voltage controller which carries out voltage control based on the detected output voltage, wherein a configuration is such that a control device controls the output voltage so that the reactor currents of the plurality of chopper circuits are equal to each other so as to prevent the average value of the ON duties of the semiconductor switching elements from changing due to the shunt control.

Power conversion apparatus with chopper circuits and output control

To provide a controller for rotary electric machine apparatus which can calculate the voltage command value of the converter which reduces power loss with good accuracy, in the case where the normal modulation control and the overmodulation control are switched and performed. A controller for rotary electric machine apparatus sets a system voltage that power loss becomes the minimum as the converter voltage command value, based on a power loss characteristics of the normal modulation control which is a power loss characteristics of at least the inverter with respect to the system voltage in performing the normal modulation control, and a power loss characteristics of the overmodulation control which is a power loss characteristics of at least the inverter with respect to the system voltage in performing the overmodulation control.

Controller for rotary electric machine apparatus

There is provided an electric-power conversion system controller in which even when the temperatures of a switching device and a diode included in the driving circuit for a converter become high, the performances of the devices are prevented from being deteriorated and the lifetimes thereof are prevented from being shortened. In the case where even when determining that direct-coupling control is to be performed, a positive-polarity-side device temperature is higher than a determination temperature, the electric-power conversion system controller performs voltage-boosting control in which the positive-polarity-side switching device and the negative-polarity-side switching device are on/off-controlled in an on/off period; in the case where the positive-polarity-side device temperature is the same as or lower than the determination temperature, the electric-power conversion system controller performs direct-coupling control in which the positive-polarity-side switching device is turned on and the negative-polarity-side switching device is turned off.

Electric-power conversion system controller

To provide a power converter which can maintain the stability and the response of the feedback control system, even if the frequency characteristic of the chopper circuit changes according to change of driving condition. A power converter is provided with a chopper circuit which has reactor and switching device; and a control circuit which changes a feedback value of duty ratio of the switching device so that a deviation between a target value of output voltage and a detection value of output voltage approaches to 0, wherein the control circuit changes a frequency characteristic of the feedback control, based on at least any two or more of information on the output voltage, information on an input voltage, and information on duty ratio.

Power converter including a feedback control system

Provided is a DC/DC converter device capable of suppressing overshooting of an output voltage and fluctuation of an input voltage. The DC/DC converter device includes: a DC/DC converter including a power conversion unit and a reactor; and a control unit. The control unit includes a rate-of-change limiting value setting unit configured to set a rate-of-change limiting value for the output voltage target value, and is configured to limit the output voltage command value by using the rate-of-change limiting value, to thereby generate the output voltage target value. The rate-of-change limiting value setting unit is configured to obtain an index value for quantitatively evaluating an amount of fluctuation in the input voltage, to thereby change a setting of the rate-of-change limiting value in such a direction as to narrow a rate-of-change limiting range when the index value is within a predetermined specific range.

DC/DC converter device

There is provided a DC power source apparatus that can prevent failures in components included in the DC power source apparatus and a load and that can prevent damage to or deterioration in the components. A control unit of the DC power source apparatus includes a function of limiting a duty value that is the ratio of an on-time to the switching period of a switching device, and makes an upper limit value for limiting the upper limit of the duty value variable during switching operation of the switching device.

DC power source apparatus

An apparatus and method for determining whether the meaning of a word included in an electronic message needs to be presented to a user, according to a dynamic determination whether the user currently knows the meaning of the word. In a client, a communication control unit receives a message sent between users, a morphological analysis unit extracts a word from the message, and a history acquisition unit acquires history information on viewing, usage, or the like of the word. A display determination unit determines whether the meaning of the word needs to be displayed, according to the acquired history information, the language level of a user stored in a user level storage unit, and the difficulty level of the word stored in a dictionary storage unit. An input/output control unit performs control such that the meaning of the word is presented to the user according to the determination result.

Apparatus and method for helping in the reading of an electronic message

To provide a DC/DC converter which does not need to switch a change direction of a control value depending on a power transmission direction between low voltage side and high voltage side, and can control a voltage of a charge and discharge capacitor. A DC/DC converter which controls voltage of a charge and discharge capacitor by a controller that performs a &#x394;duty control which changes an ON duty ratio difference of semiconductor circuits, and a phase shift control which changes a phase difference of an ON period of semiconductor circuits.

DC/DC converter

A method of protecting information in search queries uses a search apparatus with a user interface that is configured for connection to a computer network that comprises a plurality of search engines on a plurality of servers. The method includes receiving a search query comprising a plurality of keywords; dividing the search query into a number of sub-queries, each sub-query comprising at least one of the keywords; and submitting the sub-queries to different search engines.

Protecting information in search queries

There is provided a battery support structure for a vehicle. The battery support structure for a vehicle includes: a battery pack formed by housing a secondary battery in a case and disposed in a lower part of a vehicle body; and a deformable bracket that supports one end portion of the battery pack in a vehicle width direction. The deformable bracket deforms in response to an input from one end of the battery pack in the vehicle width direction so as to cause the other end of the battery pack to move in an input direction and descend relative to the vehicle body.

Battery support structure for vehicle

An apparatus and method are disclosed for determining whether the meaning of a word in an electronic message should be presented to a user, according to a dynamic determination of whether the user knows the meaning of the word. A communication control unit receives a message sent from user A to user B. A morphological analysis unit extracts a word from the message, and a history acquisition unit acquires history information on viewing, usage, or the like of the word by user B. A display determination unit determines whether the meaning of the word should be displayed, according to the acquired history information, the language level of user B, and the difficulty level of the word. The meaning of the word is presented to user B according to the determination result.

A computer system, method and computer program that retrieves, from at least one piece of moving image data, at least one scene that includes moving image content to be retrieved. The computer system includes a storage unit that stores a locus of a model of the moving image to be retrieved and velocity variation of the model; a first calculation unit that calculates a first vector including the locus and the velocity variation of the model; a second calculation unit that calculates a second vector regarding the moving image content to be retrieved included in the at least one piece of moving image data; a third calculation unit that calculates a degree of similarity between the first and second vectors; and a selection unit that selects, at least one scene which includes the moving image content to be retrieved, on the basis of the degree of similarity.

Retrieving scenes from moving image data

An optical information recording medium is provided having a superior jitter property even when an organic substance is used for a recording layer. The optical information recording medium has a substrate having a penetrating hole in a central portion thereof and a spiral pre-groove provided in one surface of the substrate, a reflection layer provided on the surface of the substrate in which the pre-groove is provided, a recording layer which is provided on the reflection layer and which is composed of an organic substance including a dye, and a light transmissive cover layer provided on the recording layer. In the optical information recording medium, the cover layer has an elastic modulus of 40 MPa or less at 25&#xb0; C. in an interface region facing the recording layer.

Optical information recording medium

If polyamine is caused to be present in the reacting system for the synthesis of nucleic acids to amplify target genes from a sample, the inhibition of the synthesis due to impurities in the sample can be reduced and the target genes can be effectively synthesized.

Enhancement of nucleic acid amplification by the addition of a polyamine

Growing community of inventors

Tokyo, Japan

Shingo Kato