Fujitsu Corporation

Mitsubishi Heavy Industries Limited

Akira Takeyama

Ken Yokoyama

Shinji Kikuchi

Kenichi Shimazaki

Satoshi Nojima

Koji Ishibashi

Nobuhiro Yugami

Lilian Harada

Naoki Matsuhira

Tetsuya Okano

Susumu Tominaga

Seiya Shindo

Mitsuru Tsuboi

Yukiko Seki

Kenshi Tazaki

Koutarou Tsuro

Norihiro Aritaka

Takamitsu Maeda

Toshihiko Naritomi

Hitoshi Matsumura

Teruyoshi Mita

Even when current values of a current that flows to a plurality of cell modules connected in parallel are different, efficient charging is performed. A charge control device that controls a charging current to be supplied to a plurality of cell modules connected in parallel compares a maximum current value, selected from current values detected by a current sensor provided in each of a plurality of the cell modules, with a reference current value predetermined as a maximum current value of the current to be supplied to secondary batteries, and controls the charging current to be supplied to a plurality of the cell modules based on a comparison result.

Controlling charging current supplied to plurality of cell modules connected in parallel

An analysis method for carrying out an analysis for responses of a computer system including a plurality of servers, includes: obtaining data concerning a CPU utilization ratio of each of the plurality of servers from the computer system, and storing the data concerning the CPU utilization ratio into a CPU utilization ratio storage; obtaining processing history data generated in the computer system, generating data of a request frequency by users of the computer system, and storing the processing history data into a request frequency data storage; and estimating an average delay time in each server by using the CPU utilization ratio of each server, which is stored in the CPU utilization ratio storage, and the request frequency stored in the request frequency data storage, and storing the estimated average delay time into a server delay time storage. By carrying out such a processing, the analysis can be carried out without changing the computer system to be analyzed and any additional cost.

Analysis method and apparatus

In determining a condition of a case under which the occurrence rate of the performance abnormality is high based on information related to a resource utilization situation acquired in a resource utilization situation acquisition step and an occurrence frequency of a request acquired in a request occurrence frequency acquisition step, and information related to the existence/nonexistence of the performance abnormality determined in a performance abnormality existence/nonexistence determination step, when branching a parent node that represents a situation of a decision tree to two child nodes using the method of decision tree, the decision tree is generated using an evaluation function which performs branching such that most of normal samples which belong to the parent node are contained in the one child node, and most of abnormal values which belong to the parent node are contained in the other child node.

Performance abnormality analysis apparatus, method, and program, and analysis result display method for performance abnormality analysis apparatus

A network repeater apparatus connected to a plurality of networks is provided which includes a VLAN tag addition section () or a VLAN tag rewrite section () that performs prescribed VLAN tag processing with respect to a communication packet based on prescribed information of the communication packet when the communication packet is input from any one among a plurality of networks, an address translation section () that translates a source address of the communication packet based on the prescribed information, and an input and output section () that outputs to a prescribed virtual network a communication packet which has been subjected to at least either one of processing by the VLAN tag addition section () or the VLAN tag rewrite section () or address translation by the address translation part (), whereby access can be made to a common device while ensuring security between the networks.

Network repeater apparatus, network repeater method and network repeater program

A communication device includes a static routing table, a dynamic routing table and a judging unit. The judging unit, if no failure occur in a static route, selects the static route based on routing information given from the static routing table as a route to which a packet should be forwarded. The judging unit, if the failure occurs in the static route, selects a dynamic route based on routing information given from the dynamic routing table as a route to which the packet should be forwarded.

Communication device for selecting route of packet

A packet switching system having a matrix switch including input packet transfer buses and output packet transfer buses. Transfer buffers or gates are provided at cross points of the input and output packet transfer buses. An input packet is supplied to the matrix switch through a transfer control circuit, and an output packet from the matrix switch is output through the transfer control circuit. The input packet is permitted to be applied to the matrix switch so that each of the output packet transfer buses has only one packet during one packet transfer cycle.

Packet switching system having bus matrix switch

A loop transmission system and a method of controlling the loop-back condition thereof. The loop transmission system comprises a plurality of node stations, a supervisory station, and two duplicate loop transmission lines which transmit signals in opposite directions. In the loop transmission system, the supervisory station first sends out loop-back commands via both of the duplicate loop transmission lines when faults are detected on both of the duplicate loop transmission lines at the same time. Each of the node stations establishes a loop-back path while retaining a connection path to a succeeding node station upon the receipt of a loop-back command. The loop-back path is released only in the node stations which receive signals normally from both of the duplicate loop transmission lines when the supervisory station sends release commands to the node stations after sending the loopback commands.

Loop transmission system and method of controlling the loop-back

Growing community of inventors

Kawasaki, Japan

Akira Takeyama