Abstract: Provided herein is a pipe joint of a relatively small joint diameter for use under ultrahigh pressure conditions. The pipe joint includes first and second joint members having mutually communicating fluid passages; and a gasket interposed between abutting end surfaces of the first and second joint members. The first and second joint members have ring-shaped seal projections formed at the abutting end surfaces thereof. The pipe joint satisfies a coefficient F of 0.4 or less in the following formula (1). F=(D32?D12)/(D42?D22), ??Formula (1): where D1 represents the inner diameter of the first and second joint members, D2 represents the inner diameter of the gasket, D3 represents the diameter of the seal projections, and D4 represents the outer diameter of the gasket.

Abstract: Provided is a switching valve for use in an analyzer module for switching flow passages of fluids, in which the manufacturing cost is reduced and the life is increased. The valve element is provided with a lower contact portion that comes into close contact with a lower valve seat disposed at a valve body when a valve is closed, and with an upper contact portion that comes into close contact with an upper valve seat disposed at a counter plate when the valve is open. The counter plate has a first recess that is open downward and a second recess that is open toward the first recess and has a smaller horizontal cross-sectional area than that of the first recess, and the upper valve seat is press-fitted into the second recess.

Abstract: A valve element movement mechanism includes: a first valve stem having one end portion to which a first valve element to close and open an area between one of the large diameter portion and the small diameter portion is fixed; a second valve stem having one end portion to which a second valve element to close and open an area between the other of the large diameter portions and the small diameter portion is fixed; a first bellows having one end portion fixed to a first bellows flange and the other end portion fixed to the first valve element; a second bellows having one end portion fixed to a second bellows flange and the other end portion fixed to the second valve element; a frame disposed outside the main passage; and an actuator to move the frame in the directions in which valve elements are closed and opened.

Abstract: Provided is a fluid controller which enables precise flow-rate adjustment while securing the durability. The fluid controller includes a stem vertical-movement-amount upper-limit-value setting means 10 which sets an upper limit value of a vertical movement amount of a stem 8 associated with opening and closing operations. The fluid controller further includes a stem vertical-movement-amount fine-adjustment means 11 which changes the vertical movement amount of the stem 8 associated with the opening and closing operations, within a range of not greater than the upper limit value.

Abstract: A gasket includes a thick portion providing a first face seal and a thin portion providing a second face seal. A fluid coupling has an annular gasket housing recess that includes a wide portion for housing the thick portion of the gasket and a narrow portion for housing the thin portion of the gasket.

Abstract: Provided is a fluid controller in which reduction of the accuracy caused by the loosening of a screw portion and reduction of the durability caused by torsional stress are prevented. A stem vertical-movement-amount adjustment means 11 is provided with: a handle 41 which has a female screw 41b on an inner periphery thereof and which is rotatably supported by a casing 4; a movable body 42 in which a male screw 46b is provided on an outer periphery thereof and is screwed into the inner periphery of the handle 41; and a guide means 43 which prevents rotation of the movable body 42 relative to the casing 4 and which enables vertical movement of the movable body 42.

Abstract: A virtual network control apparatus configured to perform assignment of physical resources under management for a virtual network embedding request, including: a physical network resource management agent configured to manage use state of resources on a physical network at each future time; and a virtual network control agent, the virtual network control agent including: demand prediction means configured to perform prediction of future demand for a virtual network; and use resource determination means configured to calculate physical resources to be used at each future time by the virtual network based on a prediction result of the demand obtained by the demand prediction means and information of future use state of resources on the physical network obtained from the physical network resource management agent, and to notify the physical network resource management agent of information of physical resources of the calculation result.

Abstract: Provided is a diaphragm valve whose durability is improved by proper caulking. On a bottom surface 2d of a depression 2c of a body 2, an annular inner projection 22 having a relatively small diameter and an annular outer projection 23 having a relatively large diameter are provided. A seat 5 is made of synthetic resin and is inserted between the inner projection 22 and the outer projection 23. Both projections 22, 23 are caulked, whereby the seat 5 is prevented from coming off. The height of the inner projection 22 is less than that of the outer projection 23, and a corner 22a on the outside of the inner projection 22 has a curved surface.

Abstract: A first on-off valve 2 and a second on-off valve 3 each are a two-port valve. A first passage block 5 is provided with a first on-off valve-corresponding inflow passage 11 and a first on-off valve-corresponding outflow passage 12. A second passage block 6 is provided with a second on-off valve-corresponding inflow passage 14 and a second on-off valve-corresponding outflow passage 15. The second on-off valve-corresponding outflow passage 15 is in communication with an upstream side portion of the first on-off valve-corresponding outflow passage 12 via a communicating passage 13 formed in the first passage block 5. An orifice 20 is provided between the second on-off valve-corresponding outflow passage 15 and the communicating passage 13.

Abstract: A vacuum valve is provided with opening pressure setting means that sets a set value of a fluid pressure in a primary side passage beyond which communication is opened and forcible opening means that forcibly opens communication regardless of the fluid pressure in the primary side passage. The opening pressure setting means includes a spring receiver fixed to a stem, a compression coil spring having a lower end supported by the spring receiver, and an adjustment screw, movable in the axial direction, that presses the upper end of the compression coil spring. The forcible opening means includes a piston inserted onto the stem 5 under the spring receiver so as to be movable upward and downward and piston driving means that moves the piston and the spring receiver upward integrally by moving the piston upward using compressed air.

Abstract: A name identification device includes a generation unit configured to generate graph information in which each node represents one of names and IP addresses included in A records and CNAME records included in a DNS response observed in a network, and each edge represents a correspondence relationship between one and another of the names and the IP addresses in the A records and the CNAME records, and to associate the generated graph information with a client corresponding to the DNS response; and an identifying unit configured to identify a name related to a leaf node that is reachable from a node corresponding to the IP address of a server by tracing the edges in the graph information having been associated with the client, for a packet between the client and the server that is observed in the network.

Abstract: In CDN, a design apparatus for designing a probability that a delivery server or a delivery route is selected for content delivery in response to a delivery request from a user includes a parameter input unit configured to receive, as input parameter values, a parameter related to the network and an estimated amount of demand for delivery requests, a selection probability design unit configured to design, based on the received input parameter values, a selection probability that a cache server is selected as the delivery server or a selection probability that a delivery route is selected, using model predictive control, so as to reduce an excessive delivery request, which is a rejection of a delivery request, wherein the delivery route is a combination of the delivery server and a delivery path on which the content is delivered by the delivery server, and a selection probability output unit configured to output the selection probability of the cache server or the selection probability of the delivery route.

Abstract: An estimation device measures a number of DNS requests for each domain name and for each IP address in observed flows, measures a total number of the flows, and total amounts of data; estimates a relationship between the amount of data for each IP address corresponding to a node, and the number of DNS requests for each domain name corresponding to a non-intermediate node; and based on a value obtained by multiplying the number of requests for each domain name by the amount of data for each flow of each domain name, obtains the amount of data for each flow of each domain name, and to multiply the amount of data by the number of the DNS requests for each domain name, so as to calculate an estimate of the amount of data for each domain name.

Abstract: An evaluation device includes a first evaluator configured, for each record used for transmission control of data circulating in a network, to evaluate extent of variation of an amount of the data, based on a history of the amounts of the data matching a condition of the record; a second evaluator configured, for each of the records, to evaluate a size of a space represented by the record, based on the condition of the record; and a calculator configured, for each of the records, to calculate an index value representing a possibility that a predetermined or a greater amount of the data matches the condition of the record within a fixed period of time, based on an evaluation result by the first evaluator, and an evaluation result by the second evaluator. Therefore, it is possible to evaluate a possibility of a sudden occurrence of a flow whose traffic volume is large.

Abstract: Provided is a fluid controller in which reduction of the accuracy caused by the loosening of a screw portion and reduction of the durability caused by torsional stress are prevented. A stem vertical-movement-amount adjustment means 11 is provided with: a handle 41 which has a female screw 41b on an inner periphery thereof and which is rotatably supported by a casing 4; a movable body 42 in which a male screw 46b is provided on an outer periphery thereof and is screwed into the inner periphery of the handle 41; and a guide means 43 which prevents rotation of the movable body 42 relative to the casing 4 and which enables vertical movement of the movable body 42.

Abstract: Provided is a fluid controller which enables precise flow-rate adjustment while securing the durability. The fluid controller includes a stem vertical-movement-amount upper-limit-value setting means 10 which sets an upper limit value of a vertical movement amount of a stem 8 associated with opening and closing operations. The fluid controller further includes a stem vertical-movement-amount fine-adjustment means 11 which changes the vertical movement amount of the stem 8 associated with the opening and closing operations, within a range of not greater than the upper limit value.

Abstract: A valve element significantly improved in rotation preventing performance of an abutting member formed of a synthetic resin by using a caulking structure and a high-temperature-oriented valve provided with such a valve element. A valve element includes: an abutting member formed of a synthetic resin and configured to close a path opening by coming into abutment with a path opening edge, and a holding member having a recessed portion into which the abutting member is fitted, in which the holding member is caulked and thus the abutting member is held by the holding member. The holding member is provided with a plurality of notches at a portion to be caulked.

Abstract: A fluid controller includes an automatic opening-and-closing device configured to move a valve rod upward and downward, and a manual opening-and-closing device configured to move the valve rod upward and downward by a manual operation. The manual opening-and-closing device includes a cylindrical handle supported by a casing so as to be rotatable and not to move upward and downward, and a cylindrical operating member screwed into a female screw of the handle and configured to move upward and downward with a rotation of the handle. The operating member is apart from a piston of the automatic opening-and-closing device in a vertical direction in an automatic operation. The piston is moved by the operating member which moves upward in association with the rotating operation of the handle in a manual operation in an opposite direction from the opening state brought by the automatic opening-and-closing device.

Abstract: There is provided a fluid controller actuator which does not require a plurality of bolts for fixing an inner side spring presser to a casing, in which a configuration is simple and a biasing force of an biasing member can be adjusted from the outside after the assembly. An inner side spring presser includes a shaft portion and a cylinder portion provided at a lower edge portion of the shaft portion, and presses an upper side peripheral edge portion of a through hole of a biasing member by a lower end of the cylinder portion. The shaft portion penetrates an outer side spring presser and extends upwardly. An adjustment screw which positions the inner side spring presser as a lower end abuts against an upper surface of the shaft portion of the inner side spring presser, is screwed to a top wall of a casing.

Abstract: A vacuum valve is provided with opening pressure setting means that sets a set value of a fluid pressure in a primary side passage beyond which communication is opened and forcible opening means that forcibly opens communication regardless of the fluid pressure in the primary side passage. The opening pressure setting means includes a spring receiver fixed to a stem, a compression coil spring having a lower end supported by the spring receiver, and an adjustment screw, movable in the axial direction, that presses the upper end of the compression coil spring. The forcible opening means includes a piston inserted onto the stem 5 under the spring receiver so as to be movable upward and downward and piston driving means that moves the piston and the spring receiver upward integrally by moving the piston upward using compressed air.