摘要:
A present invention provides a method for controlling roles of nodes in a network comprised of enormous nodes dynamically and distributed autonomously in such a way that the entire network can operate distributed autonomously. A method for controlling a field value u0 of node in a network comprises: a step of determining an initial value of said field value u0, and a step of updating said field value u0, the step of updating comprising: advertising said field value u0 to adjacent nodes, measuring an environment parameter ω from the environment of the node, receiving field values un of the said adjacent nodes, recording the field values un, calculating a new field value u0 from the field value u0, the field values un of the adjacent nodes and the environment parameter ω in such a way that field values of nodes whose environment parameter ω are within a constant range agree with given distribution, deleting the previous field value u0, and recording said new field value u0.
摘要:
In order to distribute multicast packets, using different multicast addresses and avoiding fault points, a backup server is installed close to a master and converts backup multicast packets and sends them as master multicast packets to the client. At this time, backup multicast packets are delayed and sent while the delay is determined from an allowable retransmission time, a one-direction delay to the client, a time required to detect linkage problems, and a time required to establish backup paths and so on.
摘要:
A communication system includes: a probe transmission server which transmits packets of a probe multicast at certain intervals on a same path as that of a main multicast; an aggregation server which converts multiple main cast and the probe multi cast into an aggregative multicast; and a communication control apparatus which determines an overall communication condition of the packets of the main multicast based on intervals of the probe multicast, wherein the communication control apparatus receives and recovers the packet of the main multicast from the packet of the aggregative multicast, if a communication break of the main multicast is detected.
摘要:
A fluid container in which a packaging bag with a spout is not likely to break due to a pin hole or breakage of an edge of the bag during storage or transportation, that has superior cleanliness for fluid contents, in which the packaging bag can be attached to and detached from an external container, and that is superior in working efficiency and hygiene. The container (1) has an external container (20) having an opening portion (24) and the spout-equipped packaging bag (10) used as the inner bag of the external container (20) and having the spout (11) joined to a packaging bag body (12). The packaging bag body (12) is receivable in the external container (20). The spout (11) is attachable to and detachable from the opening portion (24) of the external container (20). The packing bag body (12) is formed as a bag body by forming a heat seal portion (122) about the periphery of at least two sheets of films. A portion of the spout (11) is joined to the heat seal portion (122), at a predetermined position between the seal surfaces of the heat seal portion (122).
摘要:
The present invention detects a failure location of network in the Internet. A pair of networks consists of an access network and an Internet service provider network, and a route consists of a source pair of networks and a destination pair of networks. The quality information values are inputted to elements in a matrix that all pairs of networks are put in same order as rows (or columns) of source pairs of networks and columns (or rows) of destination pairs of networks. If inferior quality values in the matrix line up in the row (or column), a failure is determined in a destination (or a source) pair of networks in column side (or row side) corresponding to a row (or a column). If inferior quality values line up in a slanting direction, a failure is determined in a route between the Internet service provider networks indicated to the slanting direction.
摘要:
Data of traffic with long-range dependence characteristics is generated by a host terminal and transferred to a memory arranged on a board. The memory stores the traffic data comprising at least one of the number of IP packets output per unit time and total number of bytes, a set value of each parameter of the generated IP packets (i.e., packet length table) and an IP address table. A packet generation section refers to the data in the memory to generate traffic with long-range dependence characteristics at a speed corresponding to a high-speed network. As a result, the behavior of the network at the time of application of the load can be measured before the actual use of the network. According to the present invention, a traffic generation apparatus that can supply the actual network with a load close to the real traffic can be provided.
摘要:
A communication system includes: a probe transmission server which transmits packets of a probe multicast at certain intervals on a same path as that of a main multicast; an aggregation server which converts multiple main cast and the probe multi cast into an aggregative multicast; and a communication control apparatus which determines an overall communication condition of the packets of the main multicast based on intervals of the probe multicast, wherein the communication control apparatus receives and recovers the packet of the main multicast from the packet of the aggregative multicast, if a communication break of the main multicast is detected.
摘要:
A method is provided for releasing a secret number of a theft prevention function in jet propulsion boat, which is equipped with the theft prevention function. The theft preventing function is capable of turning a power source ON by an occupant inputting the secret number. In the method, at least one of a plurality of harness connected to the theft prevention function is removed to input, a predetermined number (number for release), whereby the secret number is rendered capable of being released. Since the secret number is rendered capable of being released by removing at least one of a plurality of harnesses connected to the theft prevention function, and by inputting a predetermined number, it is possible to make forgetting the secret number and maintenance of the theft prevention function compatible.
摘要:
A jet propulsion watercraft is provided with a multifunctional display portion that displays operating information and various types of warning conditions. Operation switches operate a content displayed in the multifunctional display portion. A fuel injection system injects fuel for a driving source. A warning mark warns of a faulty condition developing in the fuel injection system. Functions are provided that cause the warning mark to light steadily or flash off and on and that indicate a faulty symptom by means of a flashing pattern of a warning lamp (for example, the warning lamp flashes off and on once, twice, three time, or the like) given when the operation switches are operated while the warning mark is lit steadily or flashing off and on. A prompt action can be taken against a malfunction of the fuel injection system. As a result, convenience in eliminating malfunctions of the fuel injection system can be enhanced.
摘要:
A tape cassette includes an MIC (Memory-In-Cassette) installed inside the center section of the label surface, and a case capable of housing the magnetic tape. A switch circuit board is installed in the front part of the chassis parallel to the inner side of the front panel, and a communications antenna is mounted on this switch circuit board. When the cassette is loaded in the chassis from the cassette insertion slot, the MIC is in proximity to the front of the communications antenna and wireless communications between the antenna and MIC are carried out with high accuracy. By efficiently installing an MIC in a tape cassette having little excess space such as DAT (digital audio tape recorder) cassettes, an increase in the number of parts and the number of assembly processes can be avoided and highly accurate reading and writing of control information on the MIC in the cassette can be performed.