Abstract: A motor-driven compressor, a housing structure for a motor-driven compressor, and a method of installing a soundproof cover on a motor-driven compressor are provided. A soundproof cover includes layers that include a first layer and a second layer. The first layer is placed over a housing, and the second layer is placed over the first layer. Each of the layers includes a first segment and a second segment. A second selection layer is located inward of a first selection layer. A boundary in the second selection layer is located above the boundary of the first selection layer.

Abstract: Provided is an internal gear pump. The shape of any one of a plurality of external teeth and a plurality of internal teeth of the pump is formed on the basis of formulae (1)-(5). r=ro?dr·cos ?,??Formula (1): Px=(ro?dr)+1/4dr{1?cos(2?)},??Formula (2): Py=1/4dr{?2?+sin(2?)},??Formula (3): Qx=Px?r·cos ?,??Formula (4): Qy=Py+r·sin ???Formula (5):.

Abstract: This internal gear pump accommodates: a ring-shaped internally toothed gear provided with internal teeth, and an externally toothed gear provided with external teeth which internally mesh with the internal teeth of the internally toothed gear, said externally toothed gear being eccentrically disposed inside the internally toothed gear. The number of internal teeth is one greater than the number of external teeth. In any one of the external teeth and the internal teeth, a tooth tip section and a meshing section are formed by a curve having one continuous curvature. The curve is formed by an equation with which the maximum curvature is at the apex of the tooth tip, and the curvature gradually reduces towards the tooth bottom section.

Abstract: This internal gear pump accommodates: a ring-shaped internally toothed gear provided with internal teeth, and an externally toothed gear provided with external teeth which internally mesh with the internal teeth of the internally toothed gear, said externally toothed gear being eccentrically disposed inside the internally toothed gear. The number of internal teeth is one greater than the number of external teeth. In any one of the external teeth and the internal teeth, a tooth tip section and a meshing section are formed by a curve having one continuous curvature. The curve is formed by an equation with which the maximum curvature is at the apex of the tooth tip, and the curvature gradually reduces towards the tooth bottom section.

Abstract: Provided is an internal gear pump. The shape of any one of a plurality of external teeth and a plurality of internal teeth of the pump is formed on the basis of formulae (1)-(5). Formula (1): r=ro?dr·cos ?, Formula (2): Px=(ro?dr)+1/4 dr{1?cos (2?)}, Formula (3): Py=1/4 dr{?2?+sin (2?)}, Formula (4): Qx=Px?r·cos ?, Formula (5): Qy=Py+r·sin ?.

Abstract: An electromagnetic valve includes: a valve main body including an inlet and an outlet of a fluid; a valve body to be seated on a valve seat provided between the inlet and the outlet; a movable iron core separating the valve body from the valve seat to communicate the inlet with the outlet; and a fixed iron core attracting the movable iron core by energization of a coil to axially drive the movable iron core. The valve main body includes an insertion hole into which a guide member is inserted and a stopper portion to stop the guide member biased by a pressure of the fluid. The guide member includes a sliding hole in which the movable iron core is axially movable, and is arranged in the insertion hole in a slidable manner with respect to the valve main body to be biased by the pressure of the fluid.

Abstract: A safety valve includes a cylinder having an open end and a plug for closing the open end with a hermetic seal. The interior of the cylinder communicates with a high-pressure gas passage. The cylinder is deformed as a function of gas pressure in the high-pressure gas passage to widen the open end. This allows gas in the high-pressure gas passage to escape and thus prevents the gas pressure from increasing beyond an acceptable level.

Abstract: In a distributed computing system pertaining to the present invention, servers 2a to 2c constituting a cell achieve consensus using Paxos and execute a task using predetermined data in accordance with an instruction from a client 3. The server 2a, which acts as a leader, transmits a data acquisition promotion signal to the servers 2b and 2c, which act as agents. When the servers 2b and 2c do not store the data therein, they acquire the data and then transmit a data acquisition completion signal to the server 2a. After the server 2a acquires the data, when it receives the data acquisition completion signal from at least half of the servers constituting the cell, it transmits an execution signal for instructing execution of the task to the servers 2b and 2c. The servers 2b and 2c execute the task using the data.

Abstract: A processing method for a distributed computing system includes a round proposal signal transmission step, a round accept signal transmission step, a round-winning judgment step, an instance proposal signal transmission step, an instance accept signal transmission step, an instance consensus judgment step, an instance execution instruction signal transmission step, an instance execution step. In the instance consensus judgment step, a leader judges whether or not a condition regarding reception of the instance accept signal is satisfied, on the basis of whether or not the number of agents from which the leader has received the instance accept signal is greater than or equal to a number obtained by subtracting one from the majority of servers constituting a cell. In the instance proposal signal transmission step, the leader transmits, to each agent, the instance proposal signal for other instances without confirming satisfaction of the condition regarding reception of the instance accept signal.

Abstract: An electromagnetic valve includes a valve body, a valve element, a movable iron core, a guide tube, a coil, a yoke, and a fixed iron core. The valve body includes a fluid flow path. The valve element is movable and seated on a valve seat provided in the fluid flow path of the valve body. The movable iron core moves the valve element with respect to the valve seat. The guide tube is cylindrical and movably supports the movable iron core. The coil is mounted on an outer periphery of the guide tube. The yoke covers an outside of the coil and forms a magnetic circuit. The fixed iron core is provided facing the movable iron core and attracts the movable iron core by energization of the coil. The valve body is coupled to the guide tube on one opening end side of the guide tube, and the fixed iron core is provided on an other end side of the guide tube with a clearance spaced from an inside of the guide tube.

Abstract: In a distributed computing system pertaining to the present invention, servers 2a to 2c constituting a cell achieve consensus using Paxos and execute a task using predetermined data in accordance with an instruction from a client 3. The server 2a, which acts as a leader, transmits a data acquisition promotion signal to the servers 2b and 2c, which act as agents. When the servers 2b and 2c do not store the data therein, they acquire the data and then transmit a data acquisition completion signal to the server 2a. After the server 2a acquires the data, when it receives the data acquisition completion signal from at least half of the servers constituting the cell, it transmits an execution signal for instructing execution of the task to the servers 2b and 2c. The servers 2b and 2c execute the task using the data.

Abstract: A processing method for a distributed computing system includes a round proposal signal transmission step, a round accept signal transmission step, a round-winning judgment step, an instance proposal signal transmission step, an instance accept signal transmission step, an instance consensus judgment step, an instance execution instruction signal transmission step, an instance execution step. In the instance consensus judgment step, a leader judges whether or not a condition regarding reception of the instance accept signal is satisfied, on the basis of whether or not the number of agents from which the leader has received the instance accept signal is greater than or equal to a number obtained by subtracting one from the majority of servers constituting a cell. In the instance proposal signal transmission step, the leader transmits, to each agent, the instance proposal signal for other instances without confirming satisfaction of the condition regarding reception of the instance accept signal.

Abstract: An electromagnetic valve includes: a valve main body including an inlet and an outlet of a fluid; a valve body to be seated on a valve seat provided between the inlet and the outlet; a movable iron core separating the valve body from the valve seat to communicate the inlet with the outlet; and a fixed iron core attracting the movable iron core by energization of a coil to axially drive the movable iron core. The valve main body includes an insertion hole into which a guide member is inserted and a stopper portion to stop the guide member biased by a pressure of the fluid. The guide member includes a sliding hole in which the movable iron core is axially movable, and is arranged in the insertion hole in a slidable manner with respect to the valve main body to be biased by the pressure of the fluid.

Abstract: A safety valve includes a cylinder having an open end and a plug for closing the open end with a hermetic seal. The interior of the cylinder communicates with a high-pressure gas passage. The cylinder is deformed as a function of gas pressure in the high-pressure gas passage to widen the open end. This allows gas in the high-pressure gas passage to escape and thus prevents the gas pressure from increasing beyond an acceptable level.

Abstract: An electromagnetic pilot opening/closing valve includes: a valve main body member that includes a sliding hole; a main valve body that is slidably provided in the sliding hole; a movable iron core; and a fixed iron core. The main valve body includes a second sliding hole. A pilot valve body is provided in the second sliding hole. The movable iron core and the pilot valve body are designed to slidably engage with each other, and the movable iron core and the main valve body are designed to slidably engage with each other with a play therebetween. When the movable iron core is attracted by the fixed iron core by energization of the coil, the movable iron core causes the pilot valve body to slide inside the second sliding hole and sliding of the pilot valve body causes the main valve body to slide inside the sliding hole.

Abstract: An electromagnetic valve includes a valve body, a valve element, a movable iron core, a guide tube, a coil, a yoke, and a fixed iron core. The valve body includes a fluid flow path. The valve element is movable and seated on a valve seat provided in the fluid flow path of the valve body. The movable iron core moves the valve element with respect to the valve seat. The guide tube is cylindrical and movably supports the movable iron core. The coil is mounted on an outer periphery of the guide tube. The yoke covers an outside of the coil and forms a magnetic circuit. The fixed iron core is provided facing the movable iron core and attracts the movable iron core by energization of the coil. The valve body is coupled to the guide tube on one opening end side of the guide tube, and the fixed iron core is provided on an other end side of the guide tube with a clearance spaced from an inside of the guide tube.

Abstract: A band allocation control apparatus to control bands to be allocated to a plurality of Optical Network Units (ONUs) includes a band allocating unit which sets an allocation band to be allocated to each ONU according to a ratio of a maximum band limit value of the ONU. The apparatus achieves band control guaranteeing impartiality between the service levels of ONUs.

Abstract: A packet switched network is comprised of a communications network, such as the existing IP network, and a number of distributed protocol converters connected to the IP network. X.25 user data terminals are connected to the protocol converters. Each protocol converter serves as an interface between the user data terminals and the IP network by performing protocol conversion between TCP/IP protocol and X.25 protocol.

Abstract: A packet switched network is comprised of a communications network, such as the existing IP network, and a number of distributed protocol converters connected to the IP network. X.25 user data terminals are connected to the protocol converters. Each protocol converter serves as an interface between the user data terminals and the IP network by performing protocol conversion between TCP/IP protocol and X.25 protocol.