Mitsubishi Chemical Corporation

Mitsubishi Kagaku Media Co., Ltd.

Nippon Steel Sumitomo Metal Corporation

The University of Tokyo

Nippon Steel Corporation

Combi Corporation

Masaaki Mizuno

Michikazu Horie

Takashi Ohno

Masae Kubo

Hiroyuki Hoshino

Haruo Kunitomo

Hironobu Mizuno

Yoshiyuki Shimokawa

Hideyuki Kubo

Akio Okamuro

Ken-Ichi Takada

Masuhisa Tanimoto

Yoshihiro Suda

Hiroshi Obayashi

Kanako Tsuboya

Toshiyo Yamano

Masao Ito

Hiroyuki Sugiyama

Makoto Shimizu

Osamu Goto

Jun Kurihara

Tomoki Teramae

Natsuko Nobukuni

Naoyuki Uchida

Shigeyuki Furomoto

Takuya Saito

Satoshi Kikko

Hidemi Yoshida

Tomohiro Seki

Takuji Nakai

Masao Komatsu

Chiga Ueda

Yohsuke Yamazaki

Yasuhiro Sato

Hirotaka Mori

Masahiko Aki

Terumi Ishiguro

Koichi Ohtani

Shihpin Lin

Yoshifumi Komura

Kensuke Nagasawa

Kensuke Kimoto

Atsushi Iwamoto

Yohei Michitsuji

Ryo Matsui

A railway vehicle condition monitoring apparatus includes a detection device for detecting vehicle information represented by a wheel load or the like of a wheel included in a railway vehicle running on a railroad track, and a determination device including a classifier to which the vehicle information detected by the detection device is input and which outputs a vehicle condition such as the presence or absence of an abnormality of the railway vehicle. The classifier is generated by means of machine learning that uses training data of a railway vehicle of which the vehicle condition is known, the training data being the vehicle information and the vehicle condition which is known, the machine learning being performed so that when the vehicle information of the training data is input to the classifier, the classifier outputs the vehicle condition of the training data.

Railway vehicle condition monitoring apparatus

A method of precisely measuring the track twist of a track on which a vehicle for commercial operation is travelling using this vehicle is to be provided. The method includes measuring a condition of a track (R) on which a vehicle for commercial operation () is travelling using this vehicle (). The vehicle for commercial operation includes a bogie (). The bogie includes four wheels () and primary springs () provided to correspond to the four wheels () and support the corresponding wheels (), and is capable of measuring a wheel load of each of the four wheels (). The method includes the steps of: measuring the wheel load of each wheel () (S); calculating the displacement of each primary spring () based on the measured wheel load (S); and calculating the track twist (h) of the track (R) based on the calculated displacements of the primary springs () (S).

Method of measuring condition of track using vehicle for commercial operation and vehicle for commercial operation for measuring condition of track

A vehicle abnormality detecting apparatusincludes wheel load sensorsthat are attached to right and left rails R constituting a track to measure wheel loads of wheelsprovided in a vehicle; and a calculation unitthat is connected to the wheel load sensors. An index represented by wheel loads of a pair or more of right and left wheelsprovided in at least one of bogiesand defined according to a type of vehicle abnormality as an index for detecting the vehicle abnormality is previously stored in the calculation unit. The calculation unitcalculates a value of the stored index from the wheel loads measured by the wheel load sensorsand transmitted from the wheel load sensors, and detects the abnormality of a running vehicle based on the calculated value of the index.

Method and apparatus for detecting abnormality of vehicle

To prevent separation of a truck frame and a wheel axle and to continue supporting a vehicle, even if damage has occurred to a steering device of a steering truck in which front-back support of a steering axle is performed only by a steering mechanism. A railway vehicle steering truck provided with an axle box suspension of a steering axle, which is designed to perform support in the front-back direction of an axle box which rotatably supports the steering axle, by means of a steering device having a steering link which is rotatably connected to the axle box, and a connecting link rotatably connected to a bolster, each of these being rotatably connected to a steering lever which is rotatably connected to the a truck frame. A stopper to which the axle box comes in contact is installed both on a side where a wheelbase expands and on a side where the wheelbase contracts in the truck frame, when a front-back movement of the axle box exceeds a range of front-back movement at a time of maximum steering when the front-back movement of the axle box passes through a minimum curve.

Railway vehicle steering truck

In the event that a steering device is damaged, the damaged component is prevented from dropping onto a surface of a track or prevented from making contact with a surface of a track, even if a component to prevent dropping is not newly installed. A railway vehicle steering truck having a steering device with a steering link which is rotatably connected to an axle box which supports a steering axle, and a connecting link rotatably connected to a bolster, and these are each rotatably connected to a steering lever which is rotatably connected to a truck frame. A length A1 or A2 from one center of rotation of the steering link is shorter than a radius B of a wheel that has reached a wear limit.

To provide an optical recording medium exhibiting favorable write/read characteristics in high-speed recording. In an optical recording medium including a reflective layer, a dye-containing recording layer, and a transparent resin layer on a substrate in this order, a barrier layer is disposed between the recording layer and the resin layer, where the barrier layer comprises a material having a bulk thermal conductivity M of 70 W/m&#xb7;K or more at 300 K and has a thickness t less than 5 nm.

Optical recording medium

A rewritable optical recording medium including: a substrate having a guide groove formed thereon, a phase-change type recording layer, a portion in a crystalline state of the phase-change type recording layer corresponds to an unrecorded or erased state, and a portion in an amorphous state of the phase-change type recording layer corresponds to a recorded state, so that an amorphous mark corresponding to the recorded state is formed upon irradiation with a recording laser beam. The phase-change type recording layer contains Sb as a main component, and further contains Ge and/or Te, a content of Ge is from 1 atomic % to 30 atomic %, and a content of Te is from 10 atomic % to 30 atomic %, and in the phase-change type recording layer, Sb/Te is at least 4.5, and the atomic ratio of Ge to Te is from 1:3 to 1:20.

Rewritable optical recording medium and optical recording method

A rewritable optical recording medium includes a substrate and a phase-change type recording layer. A portion in a crystalline state corresponds to an unrecorded or erased state, and a portion in an amorphous state correspond to a recorded state, to record EFM modulated information by forming amorphous marks by irradiating the recording layer with a recording laser beam, and the recording is carried out by irradiating a recording laser beam having a wavelength of about 780 nm through an optical system having a numerical aperture NA of 0.5 or 0.55, at 24-times velocity or 32-times velocity of the reference velocity.

In an optical recording method used when information is recorded in a phase-change recording layer of a large-capacity rewritable optical recording medium such as a DVD-RW, one block pulse is used as a recording pulse for forming one recording mark when a recording velocity is higher than a recording linear velocity at which the rewritable optical recording medium can be rewritten, whereas a pulse train comprised of a plurality of short pulses is used as the recording pulse for forming one recording pulse when the recording velocity is within recording linear velocities at which the rewritable optical recording medium can be rewritten, whereby high-velocity recording is realized.

Phase-change recording layer optical recording method

Optical recording method

The present invention provides CD-RW which makes high velocity recording at a level of at least 24-times velocity possible, rewritable DVD which makes high velocity recording at a level of at least 6-times velocity possible, and a recording method therefor, while maintaining interchangeability with conventional CD-RW standards and rewritable DVD standards. A rewritable optical recording medium comprising a substrate and a phase-change type recording layer, wherein a portion in a crystalline state corresponds to an unrecorded or erased state, and a portion in an amorphous state correspond to a recorded state, to record EFM modulated information by forming amorphous marks by irradiating the recording layer with a recording laser beam, and wherein recording is carried out by irradiating a recording laser beam having a wavelength of about 780 nm through an optical system having a numerical aperture NA of 0.5 or 0.55, at 24-times velocity or 32-times velocity of the reference velocity, where the reference velocity (1-time velocity) is a linear velocity of from 1.2 m/s to 1.4 m/s, modulation mof record signals is from 60% to 80%, the top value Rof the reflectivity of the high pattern is from 15% to 25%, and jitters are at most 35 nsec.

To obtain an optical information recording medium which is highly sensitive and excellent in durability against repeated recording and which is excellent in storage stability. An optical information recording medium is employed which comprises a substrate, a recording layer, a sulfur-containing protective layer, an interface layer in contact with the protective layer and a reflective layer in contact with the interface layer and containing Ag as the main component, wherein the interface layer contains Nb and/or Mo as the main component. By providing such an interface layer, the reaction between the reflective layer and the protective layer is effectively suppressed.

Optical information recording medium

An optical phase-change disc comprises a substrate having thereon a spiral groove or concentric grooves for guiding a focused light beam, and a layer structure including a recording layer and protective layers sandwiching therebetween the recording layer. The groove has wobble for recording ATIP (absolute time information) or ADIP (address information). The following relationship between the groove width GW, beam diameter R.sub.0 and wobble amplitude a.sub.w :

Optical phase-change disc

An optical information recording medium comprising a substrate provided with periodically wobbling guide grooves with a track pitch of 1.6.+-.0.1 .mu.m, and a lower protective layer, a phase-change type recording layer, an upper protective layer and a reflective layer formed in this sequence on the substrate, for recording, retrieving and erasing amorphous marks in the guide grooves by modulation of light intensity of at least two levels by means of a focused light having a wavelength of 780.+-.30 nm applied from the side of the substrate opposite to the recording layer side so that a crystalline state with a reflectance of from 15 to 25% is an unrecorded state, and an amorphous state with a reflectance of less than 10% is a recorded state, wherein the grooves have a depth of from 25 to 45 nm and a width of from 0.4 to 0.6 .mu.m.

Optical information recording medium capable of rewriting data at low

Optical phase-change disc having a grooved substrate, with the groove

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Tokyo, Japan

Masaaki Mizuno