公开(公告)号：US20150347516A1

公开(公告)日：2015-12-03

申请号：US14427182

申请日：2013-09-27

Applicant: NEC CORPORATION

Inventor： Dai KOBAYASHI ,  Satoshi YAMAKAWA

IPC: G06F17/30

CPC classification number: G06F17/30516 ,  G06F17/30321 ,  G06F17/30528 ,  G06F17/30554 ,  G06F17/30575 ,  G06F17/30867

Abstract: A distributed storage device according to the present invention includes: a plurality of storage nodes, the plurality of storage nodes includes: a data storage unit that accumulates stream data output from a device; a first time frame generation unit that generates a time frame synchronized with another storage node and associates a data element included in stream data accumulated in the data storage unit with one of time frames; a data selection unit that selects a data element associated with a predetermined time frame from the stream data accumulated in the data storage unit, based on an access request from a client terminal; and a data transmission unit that transmits a data element selected by the data selection unit to the client terminal.

Abstract translation: 根据本发明的分布式存储装置包括：多个存储节点，所述多个存储节点包括：数据存储单元，其累积从设备输出的流数据; 第一时间帧生成单元，生成与另一个存储节点同步的时间帧，并将包含在数据存储单元中的流数据中包含的数据单元与时间帧之一相关联; 数据选择单元，基于来自客户终端的访问请求，从累积在数据存储单元中的流数据中选择与预定时间帧相关联的数据元素; 以及数据发送单元，其将由数据选择单元选择的数据元素发送到客户终端。

公开(公告)号：US20160147838A1

公开(公告)日：2016-05-26

申请号：US14895559

申请日：2014-04-30

Applicant: NEC CORPORATION

Inventor： Junpei KAMIMURA ,  Dai KOBAYASHI ,  Satoshi YAMAKAWA

IPC: G06F17/30

CPC classification number: G06F16/24564 ,  G06F3/061 ,  G06F3/0635 ,  G06F3/064 ,  G06F3/067 ,  G06F16/21 ,  G06F16/22 ,  G06F16/2255 ,  G06F16/27

Abstract: Disclosed is a technique that satisfies both the dispersion performance of the data storage locations and the access efficiency in data acquisition, even when handling a wide variety of sensor data. A receiving node determines, upon receipt of a data storage request or a data acquisition request, a data server in which data is to be stored. The receiving node includes key generation unit which generates a new key using a specified data key and a masked time-of-day acquired by applying a mask to a specified time-of-day, and destination node calculation unit which determines the data server in which the data is to be stored, using the new key generated by the key generation unit.

Abstract translation: 公开了即使在处理各种传感器数据时也满足数据存储位置的分散性能和数据采集中的访问效率的技术。 接收节点在接收到数据存储请求或数据获取请求时，确定要存储数据的数据服务器。 接收节点包括密钥生成单元，该密钥生成单元使用指定的数据密钥生成新的密钥，并且通过对指定的时刻应用掩码而获取的被屏蔽的时刻，以及确定数据服务器的目的地节点计算单元 使用由密钥生成单元生成的新密钥来存储数据。

公开(公告)号：US20170247863A1

公开(公告)日：2017-08-31

申请号：US15519896

申请日：2015-10-20

Applicant: NEC Corporation

Inventor： Dai KOBAYASHI ,  Takahiro KUMURA ,  Masatake TAKAHASHI

IPC: E03B7/07 ,  E03B7/00

CPC classification number: E03B7/071 ,  E03B1/02 ,  E03B7/003 ,  E03B7/075

Abstract: In order to keep the deterioration of water distribution pipes from progressing, a tap water management system is provided with: a water pressure detection unit for detecting the water pressure in at least one location in a water distribution pipe for carrying clean water from a water distribution site to a consumer. and transmitting the detection result as water pressure information; a deterioration detection unit for detecting deterioration in at least one location in a water distribution pipe, and transmitting the detection result as deterioration information; a water distribution planning unit for causing a water distribution plan that is a plan for water distribution pressure to be determined on the basis of information regarding past water demand; a deterioration-reducing water distribution planning unit for deciding, on the basis of the water distribution plan, the water pressure information, and the deterioration information, a deterioration-reducing water distribution plan according to the extent of deterioration; a water distribution pressure changing unit for changing the water distribution pressure of the water distribution pipe; and a water distribution pressure control unit for controlling the water distribution pressure changing unit on the basis of the deterioration-reducing water distribution plan.

公开(公告)号：US20160210237A1

公开(公告)日：2016-07-21

申请号：US14908161

申请日：2014-07-15

Applicant: NEC CORPORATION

Inventor： Dai KOBAYASHI

IPC: G06F12/08

CPC classification number: G06F12/0877 ,  G06F12/0802 ,  G06F12/1027 ,  G06F16/24552 ,  G06F2212/60

Abstract: Disclosed is a storage device which provides data with higher data throughput performance during in-memory storage access in an access environment with little locality. This storage device is equipped with: a data storage means, which includes a main memory that stores data in a block unit, and a cache memory capable of storing, in the block unit, the data stored in the main memory; access request accumulation means for accumulating an access request for data stored in the data storage means; data scanning means for, when the access request accumulated in the access request accumulation means satisfy a prescribed condition, reads the data stored in the main memory, in the block units and writes the data in the cache memory in order, and scans the data; and access retrieval means for reading from the access request accumulation means an access request for data specified by means of the scan, and returns information with which the specified data can be specified to the source from which that access request was transmitted.

Abstract translation: 公开了一种存储装置，其在具有很少局部性的访问环境中的存储器内存储访问期间提供具有更高数据吞吐量性能的数据。 该存储装置配备有：数据存储装置，其包括以块为单位存储数据的主存储器和能够以块为单位存储存储在主存储器中的数据的高速缓冲存储器; 访问请求累积装置，用于累积存储在数据存储装置中的数据的访问请求; 数据扫描装置，用于当访问请求存储装置中存储的访问请求满足规定条件时，以块为单位读取存储在主存储器中的数据，并将数据依次写入高速缓冲存储器，并扫描数据; 以及访问检索装置，用于从访问请求累积装置读取通过扫描指定的数据的访问请求，并且将指定的数据可以被指定的信息返回给发送该访问请求的源。