Nippon Telegraph and Telephone Corporation

Prime Planet Energy & Solutions, Inc.

Ntt Electronics Corporation

Oki Electric Industry Co., Ltd.

Yokogawa Electric Corporation

Kabushikikaisha Rnai

Genomedia Inc.

Tomoyuki Yamada

Yasushi Takatori

Kenichi Kawamura

Keisuke Wakao

Shota Nakayama

Koichi Ishihara

Masato Mizoguchi

Seizo Onoe

Riichi Kudo

Yusuke Asai

Hiroshi Nakamoto

Narumi Umeda

Tomoki Murakami

Masahiro Yanagisawa

Toshio Watanabe

Hitoshi Abe

Takayuki Mizuno

Takeo Ichikawa

Takashi Goh

Akira Kishida

Munehiro Matsui

Hitoshi Hara

Akimasa Kaneko

Yoshinori Hibino

Ryoichi Wakimoto

Takatsune Moriyama

Mitsuru Nagano

Takanori Utano

Takashi Hosokawa

Yu Matsui

Masahiro Hattori

Kenji Isozaki

Mikitaka Ito

Ryuji Chiba

Kazutaka Mita

Masato Nishihara

Wenjie Jiang

Mikihiro Kurosawa

Manabu Oguma

Daichi Kobori

Provided is a secondary battery that has a wound electrode assembly that has been precisely wound. A secondary battery is provided with a wound electrode assembly in which a positive electrode plate and a negative electrode plate are wound with a separator interposed therebetween, and is provided with a battery case that houses the wound electrode assembly. The separator has a strip-shaped base material layer and has a surface layer formed on the surface of the base material layer and having a mesh structure formed of polyvinylidene fluoride. The separator is positioned to the outside of a negative electrode trailing end of the negative electrode plate, and the distance between the negative electrode trailing end and a separator trailing end of the separator is not more than 30 mm.

Secondary battery

An optical device manufacturing method and an optical device manufacturing apparatus using local etching are characterized in that in a wafer process of manufacturing a waveguide type optical device including a light-propagating core and a cladding, a nozzle which locally performs etching processing is used for movement, and a slanted end surface at an arbitrary angle, an end surface having a curved shape, or a core having a varying film thickness is formed in an arbitrary position on the wafer. A slanted end surface is formed at an optical waveguide end using local etching, for example, a 45° reflective mirror, a light-condensing nonplanar reflective mirror, or a film thickness controlled core is implemented, and high-efficiency optical connection is realized.

Optical device manufacturing method and manufacturing apparatus using local etching

Disclosed here is a battery including: an exterior body having a bottom wall; and a winding electrode body in which positive electrode, negative electrode and separator are wound about a winding axis. The winding electrode body has a flat shape having a pair of curvature parts having a curved outside surface and a flat part that connects the pair of curvature parts to each other and has a flat outside surface. When a line perpendicular to the winding axis of the winding electrode body and perpendicular to the bottom wall of the exterior body is assumed as L1, a portion positioned at an outermost periphery of the negative electrode in at least one of the pair of the curvature parts faces a portion positioned on a winding inner peripheral side of the negative electrode via the separator and not via the positive electrode on the line L1.

Battery and manufacturing method therefor

Provided is a wireless LAN system in which an interference control signal transmitter that is provided in the surroundings of the wireless LAN base station and the wireless LAN terminal, and is configured to collect wireless environment information regarding the interfering AP/STA, and transmit, to the interfering AP/STA, an interference control signal that is to be used to set a transmission waiting period; and an interference control signal management device configured to collect the wireless environment information from the interference control signal transmitter, determine the interference control signal transmitter whose communication area includes the interfering AP/STA based on the wireless environment information, and control the determined interference control signal transmitter to transmit the interference control signal to be used to set the transmission waiting period that corresponds to a length of time of the communication between the wireless LAN base station and the wireless LAN terminal, wherein while the interfering AP/STA that has received the interference control signal sets the transmission waiting period, the wireless LAN base station and the wireless LAN terminal preferentially perform communication.

Wireless LAN system and interference control method

In a random access radio communication system configured to perform downlink communication from a radio base station to radio terminals by random access, the radio terminals include one or more low latency terminals requiring low latency and one or more non-low latency terminals not requiring low latency, and the low latency terminals and the non-low latency terminals are configured to be distinguished by service set identifiers (SSIDs). The random access radio communication system includes terminal assignment destination control unit of distinguishing the low latency terminals and the non-low latency terminals in accordance with the SSIDs and evenly distributing the terminals into a plurality of communication channels, and random access control unit of performing priority control on the low latency terminals and the non-low latency terminals for each communication channel so that the downlink communication in the low latency terminal satisfies a predetermined delay time.

Random access wireless communication system and random access wireless communication method

A wireless LAN communication device generates an MPDU by attaching a MAC header to transmission data, generates an A-MPDU subframe by attaching an MPDU delimiter to the MPDU, generates an A-MPDU by aggregating a plurality of A-MPDU subframes, and transmits the A-MPDU. The wireless LAN communication device includes: an MPDU duplicating means for determining whether or not transmission data is a redundancy target according to a required quality of the transmission data, determining that an MPDU generated from the transmission data determined to be a redundancy target is a redundant MPDU, and generating a duplicate MPDU by duplicating the redundant MPDU; and an A-MPDU generating means for generating an A-MPDU that includes the redundant MPDU and the duplicate MPDU.

Wireless LAN communication device and wireless LAN communication method

A search method of searching for a feature that affects an output result of a machine learning model, the search method includes: a first step of applying, to all training data, at least one or more separate filters combining at least one or more feature presence/absence determining devices that determine presence or absence of a feature on a plurality of sets of correct answer data that is positive and correct answer data that is negative and information on whether the pieces of the data is positive; a second step of applying the pieces of training data generated in the first step to separate machine learning to separately execute machine learning; and a third step of outputting information that extracts a new feature using a verification result obtained by inputting verification data to separate machine learning after the machine learning.

Search method and information processing system

A database server stores encrypted vector data in which each of a plurality of elements is encrypted by encryption maintaining semi-homomorphism between calculation before encryption and calculation after encryption. The database server receives an obfuscated query (N-randomized query) from a terminal device, performs calculation for each of a plurality of segments of vectors of the obfuscated query with a segment of the encrypted vector data, and transmits the calculation to the terminal device in reply. The terminal device may acquire a result of decryption calculation transmitted in reply by a decryption device.

Terminal device, database server, and calculation system

A wireless communication system includes a first wireless station including antenna elements, transmission units corresponding to the antenna elements, and a transmission directivity control unit that controls transmission directivity of the antenna elements, and second wireless stations each including a reception power measurement unit that measures a reception power. The transmission directivity control unit determines the transmission directivity of each of the antenna elements so that a signal does not reach a particular second wireless station among the second wireless stations. The transmission units generate wireless signals using the transmission directivity. The antenna elements transmit the generated wireless signals. The reception power measurement unit measures the reception power in a period that is set so that a signal does not reach the particular second wireless station by using the directivity, and detect the presence or absence of interference caused by the low accuracy of channel information.

Wireless communication system and wireless communication method

A spatial multiplexing wireless transmission system is formed by a base station, and by a plurality of terminal stations that are provided with a plurality of antennas. The base station is provided with an information signal generating portion, a control signal generating portion, a transmission frame generating portion, a multiple beamforming portion, a transmission/reception switching portion, a reception signal processing portion, a propagation environment estimating portion, and an antenna information generating portion. At least one of the terminal stations is provided with a transmission/reception switching portion, a reception signal processing portion, a decoding portion, an antenna information extracting portion, an antenna information generating portion, an transmitting portion, a battery, a remaining battery detecting portion, a transmission request extracting portion, and a propagation environment estimating portion.

Spatial multiplexing wireless transmission system, spatial multiplexing wireless transmission method and computer program

Two AWG circuits are integrated while preventing degradation in quality of a multiplexing/demultiplexing function. An arrayed waveguide grating circuit includes: a first slab waveguide () connected to a first input waveguide () and second output waveguides (); a second slab waveguide () connected to first output waveguides () and a second input waveguide (); and an array waveguide () connecting the first slab waveguide () and the second slab waveguide (), wherein the input waveguides () are connected to the slab waveguides () at an interval of 1.5&#xd7; from the outermost second output waveguide out of the second output waveguides () connected at an interval x depending on a wavelength.

Arrayed waveguide grating circuit

In a method of forming an oxide superconductor/semiconductor junction between an oxide superconductor and a semiconductor containing bismuth or thallium, an atomic layer of silver of no more than 3 atoms thickness is formed by vapor deposition of silver on the surface of the semiconductor, an atomic layer of bismuth or thallium of no more than 3 atoms thickness is formed by vapor deposition of bismuth or thallium on the silver layer, the double atomic layer consisting of silver and bismuth or of silver and thallium are heated to form a layer wherein the atoms of silver and bismuth or silver and thallium are arranged regularly on the surface of the semiconductor, and the oxide superconductor is formed to a specified thickness on the regularly arranged layer.

Method of forming an oxide superconductor/semiconductor junction

Method and apparatus for locating which zone and sector of a mobile

Mobile stations are classified into a first grouped station which is portable, and a second ungrouped station which is carried by a vehicle. A grouped station receives a part of the time slots of a paging channel relating to the group which the station belongs, and an ungrouped station receives all the time slots of a paging channel. A base station having a plurality of buffer cells (1-n) relating to each group, stores the queue of the paging signals in each buffer cell, and broadcasts the content of each buffer cell in the related time slot of the paging channel. A paging signal for a grouped station is stored in the related buffer cell, and a paging signal for an ungrouped station is stored in the buffer cell which has the shortest queue. Thus, a grouped station saves battery power because of intermittently receiving a paging signal, while keeping a short waiting time for an ungrouped station, and small call loss ratio.

Paging signal control system with reduced power consumption in a mobile

The invention relates to an infrared ray moisture meter which measures moisture of paper using absorption of infrared rays, and in which infrared rays being penetrated and scattered by the paper are sufficiently independent of whether the paper is thin or thick, in which sensitivity is high, in which attenuation of rays is small and error due to misalignment in the XY direction is small. Also, concurrently, in the invention, adverse influence due to quality of the paper is reduced by applying infrared rays which are absorbed by moisture, infrared rays which are absorbed by cellulose, and infrared rays which are not absorbed by moisture or cellulose, and by computing the value of moisture from signals detected from the application of the different infrared rays. In one embodiment a device is provided with a shielding plate having two mirrored surfaces disposed between the paper being measured and a lower one of a pair of reflectors.

Infrared ray moisture meter

Growing community of inventors

Tokyo, Japan

Tomoyuki Yamada