Nec Corporation

Takayuki Shizuno

Toshiya Okabe

Koji Kudo

Hisato Sakuma

Hitoshi Yano

Yoshiaki Sakae

Masumi Ichien

Tsutomu Kitamura

Kinichi Sugimoto

Yasuo Itabashi

A distributed electricity storage system () includes a plurality of electricity storage apparatuses () which are connected to the same distribution line (), a determination unit () that determines excess or deficit in the distribution line (), an acquisition unit () that acquires, with respect to each of the plurality of electricity storage apparatuses, state information indicating a state of an electricity storage apparatus and direction information indicating an operating direction of a charging direction or a discharging direction, and a selection unit () that selects an electricity storage apparatus to be controlled in charging and discharging operations from the plurality of electricity storage apparatuses, using a determination result of the excess or deficient power, the state information, and the direction information.

Distributed electricity storage system, power control method, and program

A battery control system that communicates by way of a communication network with a plurality of batteries that are connected to an electric power system includes a communication characteristics detection unit that, for each of the plurality of batteries, detects characteristics of communication paths between the batteries and the battery control system within the communication network. The battery control system includes a selection unit which selects, from among the plurality of batteries, each battery that has characteristics of communication paths within a predetermined communication characteristics range, as a regulating battery that is to be used for regulating electric power of the electric power system. The battery control system includes a control unit that supplies operation instructions that instructs the regulating batteries that were selected in the selection unit to perform a charging or discharging operation.

Electric power control system, battery control system, battery control device, battery control method, and recording medium

A battery control system that communicates by way of a communication network with a plurality of batteries that are connected to an electric power system includes: communication characteristics detection means that detects characteristics of communication paths between the batteries and the battery control system for each of the plurality of batteries; selection means that, based on the detection results of the communication characteristics detection means, selects from among the plurality of batteries each battery that uses a communication path having characteristics within a predetermined range of communication characteristics as a candidate of a regulating battery that is to be used for regulating the electric power of the electric power system, and that selects regulating batteries from among candidates of regulating batteries based on predetermined conditions; and control means that supplies operation instructions that instruct the regulating batteries to charge or discharge.

Provided is a data supply apparatus including a transmission device that sends data to another data supply apparatus; a reception device that receives data from another data supply apparatus; a data storing device that stores data in a storage device; and a data storage determination device that determines whether or not the received data should be stored in the storage device, based on a predetermined supply probability. In a typical example, the reception device receives the data to which supply probability information which indicates the supply probability has been appended; and the data storage determination device determines whether or not the received data should be stored in the storage device, based on the supply probability indicated by the supply probability information.

Data supply apparatus, system, and method for supplying data to hierarchically-connected data supply destinations

There is provided a distributed directory server to be used in a plurality of distributed directory servers connected to one another through a network and in a distributed directory system made up of a plurality of user devices, which includes a transmitting/receiving section to transmit or receive messages between user devices and other distributed directory servers, a use history notifying section to read a totalized information database and to provide notification for instructing the transmitting/receiving section to transmit data on the number of times of using Pushed data to the distributed directory server, and an evaluation function computing section to determine operation rules for Push distribution command and Pull search command to an index for every management unit.

Distributed directory server, distributed directory system, distributed directory managing method, and program of same

A port hopping flow detection system includes a storage section configured to store flow data for each of past flows of packets which have been transmitted from application programs and an application data for each of the application program. A receiving unit receives a new flow of packets. A detecting unit extracts a flow data for the new flow to store in the storage section, calculates an application data for the new flow from the extracted flow data for the new flow to compare the calculated application data with the application data stored in the storage section, and determines whether the new flow has been subjected to port hopping.

System and method for detecting port hopping

An external network relay device measures group movement parameters that are used to determine whether the need exists to change the group affiliation of internal network relay devices. When the results of measuring the group movement parameters meet conditions that have been set in advance, the external network relay device transmits group movement notification messages instructing group movement to the internal network relay devices of its own group and causes the internal network relay devices to change to other groups.

Growing community of inventors

Tokyo, Japan

Takayuki Shizuno