39results about How to "Flexible flow control" patented technology

A communication apparatus includes a plurality of first queues to which priorities or predetermined bandwidths are assigned respectively, a plurality of second queues which are corresponded to any of the plurality of first queues and to which the priorities are assigned respectively, a first writing portion which writes data blocks into any of the plurality of second queues or any of the plurality of first queues which is not corresponded to the second queues in accordance with a rule, a second writing portion which reads the data blocks stored in the plurality of second queues in order of the priorities assigned to the second queues respectively, and writes the data blocks into at least one of the first queues which is corresponded to the second queues, and a transmitting portion which reads the data blocks stored in the plurality of first queues in order of the priorities assigned to the first queues respectively or at time intervals corresponding to the bandwidths assigned to the first queues respectively, and transfers the data blocks to the communication network.

The invention relates to an experimental system and method for researching jet flow impact characteristics of a fast reactor core outlet, and the system comprises a jet flow impact main loop composed of a water storage tank, a plunger pump, a filter, a preheater, a jet flow impact chamber, a heat regenerator, a condenser, a valve, a flow meter and pipelines connecting the devices, a cooling loop composed of a cooling tower, a cooling pump, a regulating valve and a flow meter, and a water replenishing loop composed of a deionized water machine, a water replenishing tank and a plunger pump. Water in the water storage tank flows to the heat regenerator through the plunger pump, is primarily heated by the heat regenerator and then is divided into three branches to flow to a jet flow impact container, the opening degrees of the stop valves in the different branches and the heating power of the preheater are different, so that branches under different temperature and flow conditions are achieved, finally, the branches enter the jet flow impact chamber, cold fluid and hot fluid are stirred and mixed, and then the water flows through the heat regenerator and the condenser and finally returns to the water storage tank to form closed circulation. According to the invention, a jet impact experiment under a large-range temperature difference and flow working condition can be realized.

The invention relates to a two-dimensional hydraulic vibrator used for petroleum drilling, which belongs to the technical field of petroleum drilling tool design. The vibrator is composed of a flow rate control valve, a filtering joint, a screw motor motive power joint, a hydraulic impulse generator, and the like, wherein the flow rate control valve is used for adjusting the flow rate and the speed of mud flowing into the vibrator; the filtering joint is used for filtering rough mud components; the mud entering into the vibrator forms a certain differential pressure in the screw motor motive power joint to push a rotor structure inside a screw motor to rotate, and meanwhile, the rotor vibrates eccentrically in a rubber stator; the hydraulic impulse generator produces vibration in the circumferential direction through the circular change of the open area between a stationary ring and a rotating ring of a PDC thrust bearing. According to the invention, the two-dimensional vibration produced in the circumferential direction by the vibrator can effectively overcome the frictional resistance between a large displacement well and a horizontal well drill stem with a well wall, lowers the twisting moment between the drill stem and the well wall, avoids the happening of the jamming of a drilling tool, and has the characteristics of greatly improving the drilling efficiency and lowering the drilling cost.

The invention relates to the technical field of diesel engines, in particular to a urea pump for treating tail gas of a diesel engine. The urea pump mainly comprises a motor, an eccentric wheel, a connecting rod, a bearing, a membrane, a pump body, a valve seat, a valve deck, valve plates, a rear cover, a rear cover bearing and a set screw, wherein an output shaft of the motor is fixedly connected with the eccentric wheel, an excircle of the eccentric wheel is connected with an inner ring of the bearing, an excircle of the bearing is connected with the connecting rod, and the connecting rod is fixedly connected with the membrane, so that a reciprocating mechanism is formed; the front end of the motor is fixedly connected with the pump body, the bearing is arranged at the rear end of the pump body, and the rear cover of the pump is fixed on the pump body; screw holes for fixing the membrane and a pump cover are formed in the upper end of the pump body; and the valve seat provided with an arc pump cavity is assembled on the membrane, and a rectangular valve block used for controlling water to flow in and out is arranged in the valve seat. The urea pump has the advantages of simple structure, small size, low cost, flexibility in flow control, convenience in use and the like, and doesn't require to be lubricated during operation.

The invention discloses an open-loop flow cooling alkali metal vapor laser gain generator, which comprises a buffer gas storage source, a gas pressure and flow control device, a gas purifying device,a gas heating device, a vacuum acquisition and detection device, a mixing chamber and a laser chamber, wherein a buffer gas in the buffer gas storage source is adjusted through the gas pressure and flow control device and then purified through the gas purifying device at required gas pressure and flow; the purified gas is evenly mixed with alkali metal-atom saturated vapor in the mixing chamber and then flows into the laser chamber; the gas is used for controlling temperature in the laser chamber; and the gas which flows out of the laser chamber and carries waste heat is discharged into atmosphere or other gas storage chambers. The open-loop flow cooling alkali metal vapor laser gain generator has the advantages that the system structure is simple and uniform heating and precise temperature control are easy to implement.

The invention relates to an evaluating device for thermal protective property of fabrics. The evaluating device comprises a steam generator, a steam conveying pipe, a thermal exposing simulating box, a sample conveying device and a data collecting system, wherein the front end of the steam conveying pipe is connected with the steam generator while the rear end is connected with a steam nozzle; a steam outlet end of the steam nozzle is arranged in the thermal exposing simulating box; a heater, a temperature sensor and a humidity sensor are mounted in the thermal exposing simulating box; an opening is formed in the rear side of the thermal exposing simulating box; the sample conveying device is connected with the rear side of the thermal exposing simulating box; a thermal insulating plate, a fabric clamping device, a static air layer device and a sensor base are backwards arranged in the sample conveying device in turn; an outer fabric, a waterproof breathable fabric and a thermal insulating fabric are arranged in the opening in the fabric clamping device; a simulated skin sensor is arranged in the sensor base; the simulated skin sensor, the temperature sensor and the humidity sensor are connected with the data collecting system. The evaluating device provided by the invention can be used for accurately evaluating the thermal protective property of fabrics under the conditions of high-temperature radiation and high-temperature steam.

The invention discloses a communication flow control method and system. The method includes: pre-configuring a control strategy based on at least one communication service in PCRF, each communication service including communication service identifier, APN information and target area information; PCRF based on the pre-configured The control strategy controls the network access behavior of the user equipment, and generates a network bill with the corresponding communication service identifier according to the APN information and target area information of the user equipment to access the network and sends it to the billing server; the billing server Call bills and communication service identifiers accumulate corresponding communication traffic, and send the obtained accumulated traffic bills to the CRM server; the CRM server triggers traffic control execution actions for communication services based on the obtained accumulated traffic bills and pre-configured control strategies The instruction is sent to the PCRF; the PCRF executes the flow control operation on the corresponding communication service according to the instruction received.

The invention relates to a network flow control system and a network flow control method. The network flow control system comprises a UDP packet filter module, a flow control parameter update module and a TCP window shaping module, wherein the flow control parameter update module is used for receiving data packets of the system and calculating the flow control state, the UDP packet filtering ratio and the TCP window shaping ratio of the system according to the flow of the data packets and the flow control target set by the system; the UDP packet filter module is used for receiving the flow control state and the UDP packet filtering ratio, and filtering the UDP data packets flowing into the system according to the UDP packet filtering ratio when the flow control state is that the flow control is required; and the TCP window shaping module is used for receiving the filtered data packets, the flow control state and the TCP window shaping ratio and performing window shaping on the filtered data packets according to the size of the TCP windows of the data packets and the TCP window shaping ratio. The network flow control system and the network flow control method can be widely applied to network flow control systems.