Nippon Telegraph and Telephone Corporation

Nkk Corporation

Ntt Corporation

Mizusawa Industrial Chemicals, Ltd.

Jfe Steel Corporation

Hiroshi Sawada

Rintaro Ikeshita

Shoko Araki

Keisuke Kinoshita

Tomohiro Nakatani

Hiroshi Igarashi

Yusuke Tanaka

Hitoshi Shimizu

Toshio Sato

Naoki Matsui

Teiji Sato

Toshiaki Sugawara

Hiroshi Yoshimura

Takayuki Murata

Takayuki Suyama

Masaru Saito

Toru Inazumi

Nobuo Nishiura

Tomoharu Iwata

Yoshinari Shirai

Shin Mizutani

Tatsushi Matsubayashi

Akira Tatebe

Yasue Kishino

Yoshimasa Funakawa

Kenichi Mitsuzuka

Yutaka Yanagisawa

Futoshi Naya

Takuma Otsuka

Kazunori Sakao

Koji Yanagino

Kazuhiro Nitta

Naonori Ueda

Naoyuki Kamo

Jun Taniai

Seiji Wakaki

Satoru Ohta

Kohji Omori

Takumi Imajuku

An acoustic signal enhancement device includes: a spatiotemporal covariance matrix estimation unitconfigured to estimate spatiotemporal covariance matrices Rand P; a reverberation suppression unitconfigured to obtain a reverberation suppression filter Gof the sound source j using the estimated spatiotemporal covariance matrices Rand Pfor each sound source j and to generate a reverberation suppression signal vector using the obtained reverberation suppression filter Gand the observation signal vector X; a sound source separation unitconfigured to obtain an enhanced sound yof the sound source j and power of the sound source j using the generated reverberation suppression signal vector for each sound source j (where 1≤j≤J) corresponding to the target sound; and a control unitconfigured to perform control such that processes of these units are repeatedly performed.

Acoustic signal enhancement apparatus, method and program

There is provided an acoustic signal enhancement device that receives, as an input, a recording sound obtained by frequency division and updates parameters, the device including: assuming that a switch weight is a weight indicating a ratio of a classification to which a recording sound at each timing belongs in classifications of spatial states where a recording sound temporally changes, a beamformer unit that performs beamformer processing based on a weighted spatial covariance matrix which is updated and updates an auxiliary estimation value of a target sound; a switch unit that updates the switch weight and power of a target sound based on the updated auxiliary estimation value and outputs an estimation value of the target sound; and a weighted spatial covariance estimation unit that updates the weighted spatial covariance matrix based on the updated switch weight and the power.

Acoustic signal enhancement device, acoustic signal enhancement method, and program

Provided is an acoustic signal enhancement device, including a time-space covariance matrix estimation unit configured to estimate a time-space covariance matrix corresponding to a sound source, using a power of the sound source and an observation signal vector composed of an observation signal from a microphone. A reverberation suppression unit is configured to obtain a reverberation removal filter of the sound source using the time-space covariance matrix, and to generate a reverberation suppression signal vector corresponding to the observation signal for an emphasized sound of the sound source using the reverberation removal filter and the observation signal vector. A sound source separation unit is configured to obtain an emphatic sound of the sound source and the power of the sound source using the reverberation suppression signal vector.

The present disclosure relates to an apparatus and methods of estimating a traffic volume of moving objects. In particular, the present disclosure estimates the traffic volume based on amounts of traffic volume of the moving objects observed at observation points based on a routing matrix and a visitor matrix. The routing matrix indicates whether moving objects that pass through specific waypoints are to be observed at an observation point. The visitor matrix indicates whether a moving object departing or arriving at the observation point. The present disclosure enables estimating a traffic volume of moving objects on various routes based on observed data with errors in data and varying lengths in observation periods.

Estimation apparatus, estimation method and program

Provided is a sensor network capable of acquiring, from a data center, learning data composed of a pair of sensor data (input) and a classification label (output) necessary for adding/changing a classification label for updating a classifier while reducing the volume of communication between a sensor and the center. One aspect of the present invention relates to a sensor network, including one or more sensor nodes and a data center. The sensor node includes: an encoding unit for encoding sensor data by an encoder part of an autoencoder; and a transmission unit for transmitting the encoded data. The data center includes: a reception unit for receiving data encoded from sensor data by the encoder part of the autoencoder; a decoding unit for decoding the encoded data by a decoder part of the autoencoder; and a storage unit for storing the decoded data therein.

Apparatus for functioning as sensor node and data center, sensor network, communication method and program

A hot-rolling line, a method for photographing the entire width of a hot-rolled metal strip, a method for recording the photographic result of the entire width, a method for appropriately performing quality assurance, and a method for producing a hot-rolled metal strip using them, provide proper quality assurance for delivering a product to a customer. A hot-rolling line includes a near-infrared camera arranged to photograph an entire width of a hot-rolled metal strip on an entry side of a coiler of the hot-rolling line.

Method and apparatus for hot-rolling metal strip using near-infrared camera

A zinc borate having a particular crystallite size and containing very little sodium components and a method of preparing the same. The zinc borate has a particular chemical composition, has a crystallite size of not smaller than 40 nm as found from diffraction peaks of indexes of planes of (020), (101) and (200) in the X-ray diffraction image (Cu-k&agr;) and contains sodium components in amounts of not larger than 100 ppm as measured by the atomic absorptiometric method.

Zinc borate, and production method and use thereof

A soft cold-rolled steel sheet contains: 0.06 wt. % or less C, 0.1 wt. % or less Si, 0.5 wt. % or less Mn, 0.03 wt. % or less P, 0.03 wt. % or less S, 0.006 wt. % or less N, 0.009 wt. % or less B and the balance being Fe. The method comprises the steps of: continuously casting a steel to produce a slab; hot-rolling the slab to form a hot-rolled steel sheet; cold-rolling the hot-rolled steel sheet to produce a cold-rolled steel sheet; and continuously annealing the cold-rolled steel sheet.

Soft cold-rolled steel sheet and method for making the same

A method for controlling a tension of a metal strip in a heat treatment furnace, comprising (a) travelling the metal strip through a plurality of tapered rolls; (b) measuring a tension (.sigma.) working on the metal strip through at least one of the tapered rolls; (c) computing a critical tension (.sigma..sub.cr) which generates heat buckle based on a thickness of the metal strip, a width of the metal strip, an elastic modulus of the metal strip, a length of a flat roll portion and a roll taper under a hot state; and (d) controlling the tension measured by the step (b) to be over a tension (.sigma..sub.min) sufficient to prevent transverse displacement but less than the critical tension (.sigma..sub.cr) which generates heat buckle. The critical tension (.sigma..sub.cr) which generates heat buckle is calculated by the equation: .sigma..sub.cr =K.multidot.t.sup.A .multidot.(W-FL).sup.B .multidot..theta..sub.h.sup.c .multidot.E, where t is the thickness of the metal strip (mm), W is the width of the metal strip (mm), FL is the length of a flat roll portion, .theta..sub.h is the roll taper (rad) under a hot state, E is the elastic modulus of the metal strip (kgf/mm.sub.2), and K, A, B, C are constants. The tension (.sigma..sub.min) sufficient to prevent transverse displacement is obtained as a minimum value of the tension (.sigma.) satisfying the following equations: .DELTA.D&lt;(l-W))/2 and .DELTA.D=g(t, W, .mu., LS, E, .theta..sub.h, .sigma., Ra, Ra'), where .DELTA. D is the transverse displacement amount, l is the roll barrel length, .mu. is the coefficient of friction between the metal strip and roll, LS is the line speed, .sigma. is the tension of the metal strip, Ra is the surface roughness of the metal strip, and Ra' is the surface roughness of a roll.

Method for controlling a tension of a metal strip in a heat treatment

A stabilizer for chlorine-containing polymers and a process for its preparation. The stabilizer comprises a fat or oil-saponified product composite silicate in the form of hydrophobic particles of a composition containing: siliceous compound particles composed chiefly of amorphous or low-crystalline silicate of a metal of the Group II of periodic table, a metal of the Group IV and/or a metal of the Group V; higher fatty acid salts of a metal of the Group II, a metal of the Group IV and/or a metal of the Group V held in the pores or on the surfaces of said siliceous compound; and a glycerin and/or glycerin derivatives.

Stabilizer for chlorine-containing polymers, process for the preparation

Growing community of inventors

Tokyo, Japan

Hiroshi Sawada