Nishi-Tokyo-shi, Japan
Nishi-Tokyo-shi, Japan

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Kanno Y.,Tokyo Institute of Technology | Yamada H.,Kozo Keikaku Eng. Inc.
Structural and Multidisciplinary Optimization | Year: 2017

The self-weight load is a typical design-dependent load in structural optimization. This paper presents a mixed-integer second-order cone programming approach to global optimization of truss topology under the self-weight load. © 2017 Springer-Verlag Berlin Heidelberg


Patent
Kozo Keikaku Eng. Inc. and Sanwa Tekki Corporation | Date: 2013-12-27

A device for damping a transmitted vibration by the moment of inertia of a fly wheel and the adjustable resistance force of a viscous magnetic fluid to allow the viscous magnetic fluid exerts its property even under no external power source. A sleeve with an attached ball nut is disposed in a first cylinder so as to reciprocate. The reciprocating motion of the sleeve is converted into a rotational motion by a ball screw to rotate a fly wheel in a second cylinder and a generator rotating shaft. Between the fly wheel and the inner surface of the second cylinder, a sealed space is formed in which a viscous magnetic fluid is sealed. A magnetic field generating unit which generates a magnetic field running across the sealed space with the fly wheel serving as a part of a magnetic circuit is disposed on the inner circumference of the second cylinder.


Hashimoto C.,Nagoya University | Noda A.,Kozo Keikaku Eng. Inc. | Matsu'ura M.,The Institute of Statistical Mathematics of Tokyo
Geophysical Journal International | Year: 2012

The M w 9.0 off northeast Japan (Tohoku-oki) earthquake occurred on 2011 March 11 at the interface between the North American (NA) and Pacific (PA) plates. The occurrence of interplate earthquakes can be regarded as the sudden release of tectonic stress accumulated by the interseismic gradual increase of slip deficit in source regions. The inversion analysis of GPS velocity data for a seismically calm period (1996-2000) before the Tohoku-oki earthquake has revealed the existence of five remarkable slip-deficit zones distributed on the NA-PA plate interface along the southern Kuril-Japan trench. We analysed coseismic GPS displacement data for the Tohoku-oki earthquake with the same inversion method, and obtained the bimodal distribution of coseismic slip spreading over the southern two, Miyagi-oki and Fukushima-oki, interseismic slip-deficit zones. The maximum slip is 32 m for the Miyagi-oki slip-deficit zone but only 7 m for the Fukushima-oki slip-deficit zone. The extraordinarily large coseismic slip in the Miyagi-oki slip-deficit zone, where ordinarily large earthquakes with about 3 m coseismic slips have repeated every 40 yr in the past two centuries, suggests the total rupture of a 300-km-long basement asperity underlying much smaller-scale local asperities. © 2012 The Authors Geophysical Journal International © 2012 RAS.


Miyamoto A.,Yamaguchi University | Yabe A.,Kozo Keikaku Eng. Inc.
Journal of Physics: Conference Series | Year: 2011

In this paper, we propose a new method of assessing the condition of existing short- and medium-span reinforced/prestressed concrete bridges based on vibration monitoring data obtained from a public bus. This paper not only describes details of a prototype monitoring system that uses information technology and sensors capable of providing more accurate knowledge of bridge performance than conventional ways but also shows a few specific examples of bridge condition assessment based on vehicle vibrations measured by using an in-service public bus equipped with vibration measurement instrumentation. This paper also describes a sensitivity analysis of deteriorating bridges based on simulation of the acceleration response of buses conducted by the "substructure method" employing a finite element model to verify the above bridge performance results. The main conclusions obtained in this study can be summarized as follows: (1) Because the vibration responses of passenger vehicles, such as buses, have a good linear relationship with the vibration responses of the target bridges, the proposed system can be used as a practical monitoring system for bridge condition assessment. (2) The results of sensitivity analysis performed by the substructure method show that bus vibration responses are useful for evaluating target bridge performance. (3) The proposed method was applied to a network of real bridges in a local area to evaluate its effectiveness. The results indicate that the proposed method can be used to prioritize the repair/strengthening works of existing bridges based on various vibration information in order to help bridge administrators establish rational maintenance strategies. © 2011 Published under licence by IOP Publishing Ltd.


Patent
Kozo Keikaku Eng. Inc. | Date: 2016-08-17

An evacuation simulation device (100) includes a first simulation execution unit (110) configured to derive, by a first simulation method, a plurality of optimal evacuation route candidates which has a possible shortest evacuation completion time, and a second simulation execution unit (120) configured to select, by a second simulation method, an optimal evacuation route which has the shortest evacuation completion time from the plurality of optimal evacuation route candidates.


An EoD system for personal living activities. A current electric power value is received from a smart tap, a use state q of an appliance is estimated from the current electric power value, change of the use state is detected as an event when the use state is different from a use state of a previous time, and the type of the event and an occurrence time are stored in a memory. Following that, a first weight of the living activity by the type of the event is calculated based on an appliance function model and an elapsed time from the event occurrence time, and a second weight to each living activity corresponding to the current use state of the appliance is acquired from an appliance function model. Based on the product that is a multiplication of the first weight and the second weight, a sum of the products is calculated for each appliance, and a living activity label, in which the sum of the product values of each appliance becomes a maximum value, is estimated as a living activity label of a time.


An on-demand control system that supplies power to electric devices based on not predetermined priorities fixed to electric devices, but based on priorities changed according to the use status of the user. The on-demand control system can control supply of power of a commercial power source in real time in response to a power request necessary for the user and controls the supply of power according to the QoL necessary for the user through daily life. The on-demand power control system is a multiple power source management system for an on-demand power control system.


Portable turntables or rotation platforms built by assembly enable rotation of vehicles and/or loads of significant size and/or weight. The portable turntables or rotation platforms are highly effective and efficient with respect to materials, construction and environmental impact.


An EoD system can be easily introduced in consideration of personal living activities. A current electric power value is received from a smart tap 11, a use state q of an appliance is estimated (A) from the current electric power value, change of the use state is detected as an event when the use state is different from a use state q of a previous time, and the type of the event e{q q} and an occurrence time et are stored in a memory 10. Following that, a first weight p(q q|t, 1) of the living activity by the type of the event e is calculated based on an appliance function model table (1) 12b and an elapsed time from the event occurrence time et, and a second weight p(q|1) to each living activity corresponding to the current use state q of the appliance is acquired from an appliance function model table (2) 12c. Based on the product that is a multiplication of the first weight and the second weight, a sum Wl of the products is calculated for each appliance, and a living activity label, in which the sum Wl of the product values of each appliance becomes a maximum value, is estimated as a living activity label It of a time t.


An object of the present invention is to provide an on-demand control system that supplies power to electric devices based on not predetermined priorities fixed to electric devices, but based on priorities changed according to the use status of the user. The on-demand control system can control supply of power of a commercial power source in real time in response to a power request necessary for the user and controls the supply of power according to the QoL necessary for the user through daily life. The on-demand power control system of the present invention is a multiple power source management system for an on-demand power control system, the on-demand power control system including: a plurality of power sources; a plurality of electric devices; smart taps connected to the electric devices; a multiple power source management apparatus that includes a memory and that controls supply of power to the electric devices; and a network for the multiple power source management apparatus connected through the smart taps, wherein the multiple power source management apparatus includes: power supply plan generation means for setting a power use plan of a commercial power source as initial values of a supply plan of a capacitor, searching a time zone with a maximum dissatisfaction among the time zones of the initial values to set the time zone as a time-shift destination, searching a time zone with a minimum dissatisfaction to set the time zone as a time-shift source, and repeating the process until the dissatisfaction of the time-shift destination is smaller than the dissatisfaction of the time-shift source to generate a power supply plan; supply power target value update means for setting a target value of supply power for each of the plurality of power sources and feeding back and updating an error between actual power supply amount and the supply power target value at each minimum control interval; and power and power source arbitration means for repeating a process of selecting a device with a minimum priority among an electric device that has requested power and electric devices in operation, selecting a power source with a maximum power source load factor, reducing or stopping power of the electric device, and reducing supply power of the power source by an amount of the reduced power until the following Expressions (1) and (2) are satisfied, thereby arbitrating the power and the power sources to satisfy Expressions (1) and (2) at the same time.

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