Hitachi, Ltd.

Other

Mizuho-Dl Financial Technology Co., Ltd.

Nissan Motor Company Limited

Yasushi Takano

Kenji Kobayashi

Morishige Hattori

Akiyoshi Iida

Toshiaki Makino

Katsuyuki Terada

Hideo Takai

Michiyuki Takagi

Michio Sebata

Masabumi Oshima

Chisachi Katoo

Toshi Yasui

Yoshihiro Nagaoka

Sadashi Tanaka

Yukiji Iwase

Michiaki Ida

Yoshiharu Ueyama

Tetsuya Yoshida

Kanako Nemoto

Fumio Tajima

Kenji Hiraku

Shinji Seto

Kenichiro Matsubara

Kazuo Nishihama

Yosuke Tanabe

Tomoo Hayashi

Masahiro Ikegawa

Syuya Hagiwara

Kiyoshi Morita

Masahide Kimura

Takahisa Yamamoto

Kazuo Shima

Yasushi Fujita

Tsukasa Yamazaki

Yukinobu Abe

Shunji Ooki

Akira Nezu

Jiro Hashiba

Yousuke Tanabe

Kazuyoshi Yoshino

Tatsuro Ishijima

Ryuichi Sato

Toshihiko Mochida

Provided is an apparatus which selects desired explanatory variables from a plurality of candidate explanatory variables in a statistical model that expresses, by a predetermined function, a relationship between a linear predictor and an expectation value of a response variable or a probability of the response variable having certain values, by using a variable selecting model that expresses the linear predictor as a sum of a constant and a linear combination of the candidate explanatory variables and their corresponding coefficients, the apparatus including a sign condition acquisition unit for acquiring sign conditions for at least one of the coefficients; an estimator for calculating an estimate of the respective coefficients and an estimate of the constant under the sign conditions, using plural data; and a selection unit for selecting, as the desired explanatory variable, the candidate explanatory variable corresponding to the coefficient of which the estimate is calculated to be non-zero.

Apparatus, method, and program for selecting explanatory variables

A sound generator is provided capable of generating vehicle sound that will be produced when a specific sound element is changed out of a plurality of sound elements arising from the operation of a plurality of components mounted on a vehicle. A sound generatorincludes: existent sound acquisition meansthat acquires sound pressure data of vehicle sound produced from a vehicle; existent component-based sound calculation meansthat calculates existent component-based sound caused by an existent component out of the vehicle sound; existent component-based sound cancel meansthat calculates existent component canceled sound obtained by canceling the existent component-based sound from the vehicle sound; new component-based sound calculation meansthat calculates new component-based sound caused by changing of the existent component-based sound; synthesized sound generation meansthat synthesizes the existent component canceled sound and the new component-based sound to generate a sound pressure waveform of synthesized vehicle sound; and synthesized sound production meansthat produces sound based on the sound pressure waveform of the synthesized vehicle sound.

Sound generator

The risk measures of a portfolio are calculated with speed. Concerning a loss for each of the sectors to which the companies constituting the portfolio belong, the Laplace transform of a conditional probability distribution in which factors affecting management indexes are respective values is calculated in advance and stored in a storage unit as data. The stored data is retrieved as an approximate value and used when a numerical calculation of an integral is performed, to perform the integration. Consequently, as it becomes possible to quickly calculate the Laplace transform of a density function and a distribution function, it is possible to calculate the density function and the distribution function by Laplace inversion and calculate the risk measures of the portfolio.

Method and apparatus for calculating credit risk of portfolio

Provided is a rotating electric machine which can restrain vibration and noise induced by a radial electromagnetic force of the rotating electric machine, and in which a rotor is divided into first to fourth four rotating pieces having axial lengths of 0.29L, 0.71L, 0.71L and 0.29L where 2L is an axial length of a rotor or stator core, and secondary conductors defining effective magnetic pole opening angles, are arranged being shifted by a value which is equal to a phase difference of electric angle between axial sections of the rotor pieces in order to define skews so that phase differences of electric angles are continuous between axial sections of the first and second rotor pieces, the skews being continuous between the third and fourth rotor pieces but being not continuous between the second and third rotor pieces arranged being shifted by a value which is equal to a phase difference of electric angle between axial sections of the rotor.

Rotating electric machine

The vibration and noise excited by the electromagnetic exciting force in the radial direction of an electric motor are suppressed. In an electric motor, a rotoris divided into four rotor pieces, andfor an axial length of 2L of one group of the rotor core, and for example, the four rotor pieces, andare ideally 0.29L, 0.71L, 0.71L, and 0.29L in axial length in the axial direction, and permanent magnetsof the rotor pieces, andare arranged in the circumferential direction so that the phase differences of the electrical angle are 0, &#x3c0;, 0, and &#x3c0;. Further, when an effect is obtained even if the ideal axial length is changed, the tolerance of the aforementioned axial length is &#xb1;0.1L.

Electric motor

In a fluidal machine with an impeller rotating to urge a fluid radially outwardly by a centrifugal force, a vane guiding the fluid discharged from the impeller, a vane member which includes a front end of the vane facing to the impeller so that the fluid discharged from the impeller strikes against the front end and which is prevented from contacting the atmosphere, and a casing surrounding the vane member and contacting the atmosphere, the vane member is discrete from the casing, a vibration propagation between the vane member and the casing is prevented or restrained, and a vibration of a pipe extending from the casing is absorbed.

Fluidal machine

A low noise current collector 20 having excellent controllability and response, and a high speed railway train using such current collectors. The current collector 20 includes an aerodynamically shaped current collector head 22, a driving cylinder 32 to move the current collecting head, a supporting insulator 30, and a cable head 50 supporting a conductor 53 for conducting current from current collecting head 22 to a load. The current collector 20 is controlled by a cylinder 7 for raising and lowering so that the current collector may be contained in a dome 4 when it is in use. A multi-car train has four current collectors, two toward each end, and each current collector has its front side directed toward the center of the train. The two current collectors at the rear of the train are utilized, while the two at the front are contained within their domes 4. Therefore, the train can run in either direction, utilizing the appropriate pair of current collectors.

High speed low noise current collecting equipment and method on

A current collector for a railway trolley vehicle includes a current collecting member having a contact strip, a driving system for moving the current collecting member into and out of contact with a trolley wire, a load cell for detecting force acting between the current collecting member and the driving system, a displacement meter for detecting displacement of the driving system, first and second estimating circuits, and a control circuit. The first estimating circuit provides an estimated value of the contact force between the current collector and the trolley wire by estimating values of first parameters of the contact strip, the current collecting member, and the trolley wire and summing products of each of these values and a corresponding weighting factor. The second estimating circuit provides an estimated value of a disturbance suppressing force by estimating values of second parameters of the contact strip, the current collecting member, and the trolley wire and summing products of each of these values and a corresponding weighting factor. The control circuit calculates a difference force value by subtracting the estimated contact force value and the estimated disturbance suppressing force value from a contact force target value. The control circuit then adjusts a pushing-up force of the driving system on the basis of the calculated force difference value.

The invention relates to a current collector for an electrically powered vehicle. The collector includes a current collecting member which collects current from a current supplying body and conducts the current to a load in the vehicle. The current collecting member is coupled to a driving system through a first insulating element. The driving system moves the current collecting member to the current supplying body. A sensor for controlling the driving system is positioned between the driving system and the insulating element.

A current collecting apparatus provided with sliders 2 for collecting electric power from a power feeder 1, a current collector 3 for collecting power, an insulator for insulating and supporting the current collector 3, and a flexible conductor for delivering the power collected by the current collector 3 to a conductor 5, which is connected to the flexible conductor and used for supplying the power to the vehicle side. The conductor 5 and the insulator 4 are disposed so that the former is offset with respect to the latter in the crosswise direction of a railway vehicle. With this arrangement, aerodynamic noise emanating from the current collector loaded on the vehicle running at high speed can be substantially reduced.

Current collecting apparatus

Growing community of inventors

Chiyoda-machi, Japan

Yasushi Takano