Abstract:
A computer-readable storage medium storing a data collection program for causing a computer, which is configured to collect training data used for training a machine learning model, to perform processing. In an example, the processing includes: selecting a target data having a confidence level lower than a predetermined value, the confidence level corresponding to a confidence for an output from the machine learning model when collected data is input into the machine learning model; and collecting, for a target object related to the selected target data, the training data such that the confidence is high.
Abstract:
A non-transitory, computer-readable recording medium stores therein an arrangement search program that causes a computer that searches arrangement of virtual machines in plural servers in a facility including the plural servers to execute a process that includes setting an initial value of a parameter concerning the arrangement of the plurality of virtual machines in the plurality of servers, based on at least any one of first performance information on power consumption of the plurality of servers, second performance information on power consumption of air conditioning equipment installed in the facility, third performance information on power consumption of power source equipment installed in the facility, and heat coupling information on heat coupling among the plurality of servers and among the plurality of servers and the air conditioning equipment; and updating the parameter by a sequential parameter estimation method, so as to optimize power consumption of the overall facility.
Abstract:
A power supply apparatus includes: an inductor to which an input voltage is applied; a switching element that switches a current flowing to the inductor on and off so as to cause an induced voltage to be generated; an electrolytic capacitor that smoothes the induced voltage and outputs the voltage to a load; and a control circuit that controls the switching element, wherein the control circuit outputs a second switching control signal obtained by superimposing a degradation detection-purpose signal for detecting degradation of the electrolytic capacitor on a first control signal, detects an output voltage output by switching performed by the switching element controlled by the second control signal, and estimates the degradation of the electrolytic capacitor by using the output voltage detected, a duty cycle of the first control signal, and a frequency component of the degradation detection-purpose signal contained in the output voltage detected.
Abstract:
A thermofluid simulation method includes referring to a storage unit storing a simulation result corresponding to a predetermined analysis range including partial spaces set in a space subject to simulation, and a first reduced order model generated based on the simulation result, generating a second reduced order model derived from the simulation result thus referred to for an analysis range having an arrangement of partial spaces matching an arrangement of the partial spaces of the predetermined analysis range in the space subject to simulation, and storing the generated second reduced order model in the storage unit, and interpolating reduced order models among reduced order models stored in the storage unit based on a boundary condition to form a reduced order model group corresponding to variable ranges of the boundary condition, the reduced order model group including the first, and the second reduced order models.
Abstract:
A non-transitory computer-readable recording medium has stored therein a data gathering program executable by one or more computers, the data gathering program including: performing data augmentation on unlabeled data; providing a specification label to a group of augmented data pieces generated by the data augmentation, the specification label indicating that labels of the augmented data pieces all match; and providing, when a label for one data piece of the augmented data pieces is determined, the label to one or more data pieces each provided with a specification label that is same as a specification label of the one data piece.
Abstract:
A power-supply control apparatus includes a processor that executes a process. The process includes calculating, for a first time period, a first predictive value of total power consumption by the power-supply control apparatus and one or more other power-supply control apparatuses to which power is supplied from a power supply; and determining whether to allow a storage battery to be charged in the first time period based on the first predictive value for the first time period and previous information that is related to the first predictive value and obtained in a second time period before the first time period.
Abstract:
A computer system includes servers having virtual machines arranged therein; a noise source in each among the servers, the noise source emitting sound when the server is operated; and a controller that controls arrangement of the virtual machines in the servers. The controller solves an integer programming problem having an objective function representing a noise contribution described as any one among a function of virtual machine arrangement and a function of a job assignment count and indicating an extent of contribution of the sound emitted from the noise source to a noise volume at an evaluation point, by executing software for solving the integer programming problem on a processor, and based on a solution to the integer programming problem, causes the processor to arrange the virtual machines in the servers via an interface for the servers.
Abstract:
A control device includes: a power supply circuit that controls output voltage using a switching element; a generation unit that generates a reference signal on the basis of the output voltage from the power supply circuit; a PWM unit that generates a PWM signal that is output to the switching element by comparing the reference signal with a carrier signal; and a switching unit that switches a frequency of the carrier signal by changing amplitude of the carrier signal, wherein the generation unit generates the reference signal on the basis of the frequency.