Fujitsu Corporation

Canon Kabushiki Kaisha

The University of Tokyo

Sanyo Denki Co., Ltd.

Akira Ueda

Tadashi Katsui

Masahiro Suzuki

Atsushi Yamaguchi

Masumi Suzuki

Nobuyoshi Yamaoka

Yasushi Uraki

Junichi Ishimine

Kiyotaka Miura

Seiichi Saito

Yuji Ohba

Ikuro Nagamatsu

Hiroyuki Furuya

Kazuhiro Nitta

Akihiro Otsuka

Minoru Hirano

Tsunehiro Tsukada

Shigeru Hidesawa

Hideharu Matsushita

Toyokazu Hamaguchi

Takashi Matsushita

Honami Oosawa

Yoshihiko Aizawa

Masaki Tamura

Yasuyuki Tsukui

Chisachi Kato

Akihiro Otsuka, Sr

Koichi Shimizu

Kenichiro Aoki

Akira Sakai

Masao Kondo

Tetsuyuki Kubota

Yuichi Arita

Koji Demizu

Yasuhiro Ite

Toshiyuki Nakada

Keishi Shimizu

Kazuyuki Ujiie

Hiromi Fukino

Takamasa Shinde

Kazuhisa Inagaki

Yasushi Onodera

Sayoko Tominaga

A temperature calculation method for a substrate, the temperature calculation method includes: calculating, by a computer performing a circuit simulation based on a resistance equivalent to a component that joins two substrates included in a target model of an analysis, a value of a current that flows through the component or voltage values in respective end portions of the component; setting, based on model information for expressing the target model, the current value or the voltage values in a first surface and a second surface that are included in surfaces of an outer shape of the component and that are in contact with the respective substrates; and calculating a first current density distribution of the component by performing a first electrical analysis according to the setting.

Temperature calculation method, information processing device, and non-transitory recording medium storing temperature calculation program

A non-transitory computer-readable recording medium stores an analysis model adjustment program. The analysis model adjustment program makes a computer execute the following processes. The computer compares a first attribute value that indicates an operating point of a fan in a first analysis model that represents an apparatus that includes the fan with a second attribute value that indicates an operating point of the fan in a second analysis model that is more simplified than the first analysis model. Next, the computer changes an aperture ratio of the second analysis model according to a result of the comparing the first attribute value with the second attribute value.

Information processing apparatus that adjusts analysis model and method for adjusting analysis model

There is provided a determining apparatus which includes a first extractor configured to extract space inside an electronic device from a model indicating the electronic device, the electronic device including a plurality of audio output apparatus and a plurality of ribs, a second extractor configured to extract the plurality of ribs from the model, a divider configured to divide the space into a plurality of chambers, the plurality of chambers being partitioned by the plurality of ribs, and a determining unit configured to determine respective rear chambers to each of the plurality of audio output apparatus so that the rear chambers satisfies a certain parameter, the rear chambers being formed by combination of one or more chambers determined by the determining unit.

Determining apparatus, program, and method

An operation unit calculates, for each object, a ratio of an amount of temperature rise against a tolerance for temperature rise by using an amount of temperature rise from a predetermined temperature of each object when each fan is operated with a first air volume of each fan and a tolerance for temperature rise from the predetermined temperature of each object. The operation unit calculates a second air volume of each fan, based on the ratio calculated for each object and cooling contribution information of each fan to the object.

Information processing apparatus and air volume calculation method

A design support method includes: executing by a computer operations of: moving, in an arbitrary direction, a first particle that is placed at a position in an internal space of a three-dimensional model of a design target and has a diameter of a size; recording a movement trace of the first particle; and calculating a volume of a first spatial region formed by the recorded movement trace.

Support method, recording medium, and design support device to calculate a volume of a three-dimensional model

An information processing system includes an information management apparatus that accepts image generation requests and an image generation section that generates image data, which is provided independently of the information management apparatus. The information management apparatus issues a job ID in response to a print request from a client, and transmits the job ID and a URL of the image generation apparatus to the client. Based on the URL, the client directly requests the image generation apparatus for image data corresponding to the job ID.

Generating image data in accordance with identification information

An air conditioning control apparatus for controlling an air conditioner in a room which accommodates a computer, includes obtaining repetitively a detected value of a total power consumption of the computer and the air conditioner and a detected value of a air temperature at the air inlet, storing the obtained values into a memory, determining an approximate expression representing a relation between the total power consumption and the air temperature on the basis of the values stored into the memory, determining a value of the air temperature corresponding to the lowest value of the total power consumption, by using the calculated approximate expression, and controlling the air conditioner so that the air temperature become equal the calculated air temperature.

Air conditioning control apparatus and air conditioning control method

A blower control device changes a PQ characteristic in a second table so that an operating point (Q, P) on the PQ characteristic in the second table agrees with an operating point (Q, P) on a PQ characteristic in a first table. At this time, the blower control device changes the PQ characteristic in the second table at a rate based on Qand Q. Furthermore, the blower control device changes a load noise characteristic in the second table at a rate based on Qand Q. Then, the blower control device calculates load noise corresponding to the operating point (Q, P) with respect to each rotation frequency ratio from the changed load noise characteristic. And then, the blower control device determines a rotation frequency ratio corresponding to the lowest load noise as a rotation frequency ratio at which a plurality of fans is rotated.

Blower control device, blower control method, and computer-readable recording medium

An installation for cooling an electronic device includes an air conditioner having an air outlet for blowing cooling air to a room; a first detector adjacent to the air outlet of the air conditioner, for detecting a temperature of the cooling air; a rack accommodating the electronic device, the rack having an air inlet for receiving the cooling air from the air conditioner and an air outlet for exhausting air to the room; a second detector adjacent to the air inlet of the rack, for detecting a temperature of air received through the air inlet of the rack; and a controller for acquiring the temperatures detected by the first and the second detectors, and controlling a quantity of the cooling air blown from the air outlet of the air conditioner so as to decrease a difference between the temperatures detected by the first and the second detectors.

Air conditioning installation and control method

Information processing method, information processing apparatus and program for obtaining image generation data based on specified identification information

An analysis apparatus for a printed circuit board. The analysis apparatus includes a processor that executes a process of rewriting physical property data of a wiring layer of a printed circuit board to a value. The value is based on physical property data of an electronic part having a heat-generating attribute. The electronic part is mounted on the portion of the wiring layer. The analysis apparatus converts the physical property data of the portion of the wiring layer that has the electronic part to physical property data of an insulating layer of the printed circuit board.

Analysis apparatus and method to analyze a printed circuit board

A counter-rotating axial flow fan with reduced noise at the target operating point achieved without modifying a front impeller, a rear impeller, or a middle stationary portion is provided. An annular rib including a projecting surface for generating turbulent flow is formed on an inner wall portion of a casing at a position off from the middle stationary portion to a side of the rear impeller, the projecting surface extending radially inwardly of the inner wall portion and extending continuously in the circumferential direction of the inner wall portion. A fluid striking the projecting surface for generating turbulent flow is partially disturbed to form a turbulent flow before entering an area in which the rear impeller is provided. The turbulent flow suppresses flow separation of a fluid flowing along the surfaces of rear blades of the rear impeller from the surfaces of the rear blades.

Counter-rotating axial flow fan

An apparatus for controlling grille aperture ratios of a plurality of air transfer grilles which are installed in a room, includes a determining unit for determining target grille air volumes of air blowing to the racks, for determining simulation air volumes of air blowing from the air transfer grilles on the basis of the target grille air volumes so that each of air of the target grille air volumes are blown to the racks, and for determining grille aperture ratios for each of the air transfer grilles on the basis of the plurality of simulation air volumes so that each of the amounts of air blowing from the air transfer grilles is replaced by each of the simulation air volumes, and a controller for controlling each of the grille aperture ratios of the air transfer grilles on the basis of each of the determined grille aperture ratios.

Apparatus and method for controlling grille aperture ratios of a plurality of air transfer grilles

A counter-rotating axial flow fan with improved characteristics and reduced noise compared to the related art can be provided. Defining the number of front blades as N, the number of stationary blades as M, and the number of rear blades as P, and defining the maximum axial chord length of the front blades as Lf, the maximum axial chord length of the rear blades as Lr, the outside diameter of the front blades as Rf, and the outside diameter of the rear blades as Rr, the counter-rotating axial flow fan satisfies the following two relationships: N&#x2267;P&#x3e;M; and Lf/(Rf&#xd7;&#x3c0;/N)&#x2267;1.25 and/or Lr/(Rr&#xd7;&#x3c0;/P)&#x2267;0.83.

A thermal-fluid-simulation analyzing apparatus includes an execution unit that generates an analysis model using analysis conditions to conduct a first thermal fluid simulation analysis based on the generated analysis model, an analysis-condition collecting unit that collects analysis conditions when a predetermined period passes after the first thermal fluid simulation analysis, a condition extracting unit that extracts a boundary condition from the analysis conditions collected by the analysis-condition collecting unit, and a re-execution unit that selects a region corresponding to the boundary condition extracted by the condition extracting unit from regions of the analysis model generated by the execution unit, updates the selected region with the boundary condition, and conducts a second thermal fluid simulation analysis for the updated analysis model.

Thermal-fluid-simulation analyzing apparatus

Growing community of inventors

Kawasaki, Japan

Akira Ueda