56results about How to "Reduce stall" patented technology

Improved data transport and management within a network communication system may be achieved by utilizing a transmit timer incorporated within the sender device and exploiting host-level statistics for a plurality of connections between a sender and receiver. The period of the transmit timer may be periodically adjusted based on a ratio of the smoothed round-trip time and the smoothed congestion window, thereby reducing or eliminating bursty data transmission commonly associated with conventional TCP architectures. For applications having a plurality of connections between a sender and a receiver that share a common channel, such as web applications, the congestion window and smoothed round trip time estimates for all active connections may be used to initialize new connections and allocate bandwidth among existing connections. This aspect of the present invention may reduce the destructive interference that may occur as different connections compete with one another to maximize the bandwidth of each connection without regard to other connections serving the same application. Error recovery may also be improved by incorporating a short timer and a long timer that are configured to reduce the size of the congestion window and the corresponding transmission rate in response to a second packet loss with a predefined time period in order to increase resilience to random packet loss.

Flying Car, readable aircraft, amphibian, multimode, multifunctional, composite versatile personal transport vehicle with twin, parallel fuselages, hulls, each with inflatable pontoons and/or wheels below and a cabin. Combined, aircraft, airplane, aeroplane, flying, air, aerial, airborne vehicle with variable, folding wings which is convertible via automatic transformation to a land vehicle and to a sea vessel. Two wings are stored between the fuselages. They extend on a system of rails, pivots and counter-rotating, fuselage-mounted arms which then sink flush into the wings' undersides and lock for flight. Upon wing extension and retraction, controls for road transport and flight controls alternately emerge or are stowed inoperably, as needed. Engine power alternately drives a propeller for flight, wheels for road travel and a separate, submersible, marine propeller for water transport.

A wind turbine having at least one rotor blade attached to a rotor hub is provided, wherein the wind turbine further includes at least one sensor disposed at or near the rotor blade, the sensor being adapted to detect an aerodynamic condition of the rotor blade.

A 3D graphics architecture in which a buffer is placed between the sequencer and the processing element (PE) array. The sequencer and PE array are not designed to run in lock step: instead the sequencer and PE array are decoupled to allow the PEs to run at 100% efficiency even when the sequencer is switching between threads and performing other flow control operations. Thus, the rate of instruction processing in the PE array is not coupled to the rate of instruction processing in the sequencer.

Prediction of data values to be read from memory by a microprocessor for load operations. In one aspect, a method for predicting a data value that will result from a load operation to be executed by the microprocessor includes accessing an entry in a load value prediction table that stores a predicted data value corresponding to the load operation. The predicted data value is stored in a physical storage destination of the microprocessor to be available as a result of the load operation without waiting for execution of the load operation to complete. The storage destination is the destination for a loaded data value resulting from executing the load operation.

A method and apparatus are disclosed for enhancing the pipeline instruction transfer and execution performance of a computer architecture by reducing instruction stalls due to branch and jump instructions. Trace cache within a computer architecture is used to receive computer instructions at a first rate and to store the computer instructions as traces of instructions. An instruction execution pipeline is also provided to receive, decode, and execute the computer instructions at a second rate that is less than the first rate. A mux is also provided between the trace cache and the instruction execution pipeline to select a next instruction to be loaded into the instruction execution pipeline from the trace cache based, in part, on a branch result fed back to the mux from the instruction execution pipeline.

A fluid flow control device for an aerofoil comprises an aerofoil-tip body of aerofoil shape, coupling apparatus adapted to couple one end of the body to an aerofoil, and a passive tip blowing assembly. The passive tip blowing assembly is provided at the other end of the aerofoil-tip and comprises a housing defining a fluid chamber and a vane of aerofoil shape. The fluid chamber extends along part of the chord-length of the body and has a fluid inlet and a fluid outlet. The vane is arranged along the chord of the aerofoil-tip, with its leading edge at the inlet and its trailing edge at the outlet. The aerofoil section of the aerofoil-tip has a higher camber than that of the aerofoil, which turns fluid flow across the low pressure side of the aerofoil towards the aerofoil-tip, so that the fluid flow mirrors the fluid flow across the high pressure side of the aerofoil.

Prediction of data values to be read from memory by a microprocessor for load operations. In one aspect, a method for predicting a data value that will result from a load operation to be executed by the microprocessor includes accessing an entry in a load value prediction table that stores a predicted data value corresponding to the load operation. The predicted data value is provided as a result of the load operation without waiting for execution of the load operation to complete based on a confidence parameter stored in the entry compared to a dynamic confidence threshold.

A method for controlling a vehicle engine having a plurality of cylinders is provided. The method comprises: during engine idling, advancing spark timing of at least one cylinder to before a peak torque timing, and retarding spark timing from the advanced timing toward the peak torque timing in response to decreased engine speed to maintain idling speed.

A video coding apparatus, a decoder and a method for deferring the decoding of blocks of pixel data not yet ready for decoding during which other blocks of pixel data can be decoded nearly immediately. By deferring decoding and allowing the decoder to continue to successive blocks, the decoder can reduce stalls in the decoding process, which in turn, can decrease idle time in the decoder as well as power consumption that otherwise occurs during such idle time. In one embodiment, an exemplary method decodes a bit stream representing video images. The method includes deblocking blocks of a first frame as first frame blocks, determining a block of a second frame depends on a reference block of the blocks, and deferring decoding of the block. In at least one embodiment, the method can include decoding other blocks of the second frame at least partially concurrent with deferring decoding of the block.

The invention relates to a wind machine blade airfoil profile capable of controlling flow stalling through standing vortex. An airfoil profile between a shaping starting point and an airfoil profile trailing edge point is modified, thus a concave pit is formed; the shaping starting point and the airfoil profile trailing edge point are connected through a straight line, a concave pit starting point and a concave ending point are connected by virtue of a 1/4 circular arc, and the concave ending point, a first transition point, a second transition point and the airfoil profile trailing edge point are connected through a B spline; and the airfoil profile trailing edge is provided with a Gurney wing flap. According to the invention, the amplitude of the thickness reduction of the upper surface is slowed down to delay the separation of the flow field of the upper airfoil, vortex with a fixed position is formed by the air flow at the concave pit of the upper surface, under the action of the vortex, the separation of the upper surface of the airfoil can be controlled effectively, the irregular falling of separated vortex is avoided, and vortex lifting force is formed at the upper surface of the airfoil, and the stalling of the airfoil is slowed down, so that the stalling incidence of the airfoil is improved.

The invention discloses an automatic paralleling method and device for steam-driven induced draft fans of a thermal power generating unit. The method comprises the steps of: determining whether automatic paralleling of steam-driven induced draft fans is required according to unit load; when automatic paralleling of steam-driven induced draft fans is required, controlling stationary blades of an electrically-driven induced draft fan to automatically track and maintain stable furnace draft of the thermal power generating unit, carrying out a paralleling operation to the steam-driven induced draft fan A and the steam-driven induced draft fan B in the thermal power generating unit in order, adjusting the steam-driven induced draft fan A and the steam-driven induced draft fan B to be identical in rotating speed and stationary blade opening, and controlling the stationary blades of the steam-driven induced draft fan A and the steam-driven induced draft fan B to automatically track the furnace draft. The device comprises an automatic paralleling trigger unit, an automatic control unit for the electrically-driven induced draft fan, a first paralleling operation control unit, a second paralleling operation control unit, a synchronous operation control unit for the steam-driven induced draft fans, all of which completely correspond to the method. The automatic paralleling method and device for the steam-driven induced draft fans of the thermal power generating unit allow decrease of fan paralleling time, reduction of manual operation, and reduction of risks of stalling and surging during fan paralleling.

An improved variable geometry diffuser (VGD) mechanism for use with a centrifugal compressor. This VGD mechanism extends substantially completely into the diffuser gap so that the VGD mechanism may be used more fully to control other operational functions. The VGD mechanism may be used to minimize compressor backspin and associated transient loads during compressor shut down by preventing a reverse flow of refrigerant gas through the diffuser gap during compressor shutdown, which is prevented because the diffuser gap is substantially blocked by the full extension of the diffuser ring. During start-up, transient surge and stall also can be effectively eliminated as gas flow through the diffuser gap can be impeded as load and impeller speed increase, thereby alleviating the problems caused by startup loads at low speeds. The VGD mechanism can be used for capacity control as well so as to achieve more effective turndown at low loads.

The invention relates to the field of control, in particular to a direct-current motor control device, a direct-current motor control method, a direct-current motor and an air purifier. The control device comprises a storage unit, a judgment unit and a control unit, wherein the storage unit is used for storing a correspondence between the operational period of a direct-current motor and the adjustment of a motor drive signal duty ratio; the judgment unit is used for determining the operational period of the direct-current motor; and the control unit is used for controlling the adjustment of the motor drive signal duty ratio according to the operational period determined by the judgment unit and the correspondence. According to the scheme provided by the invention, the rotational speed of the direct-current motor is regulated by adjusting the duty ratio PWM, and corresponding adjusting ways are given out in different periods of the direct-current motor in the adjustment process, so that the target rotational speed is reached gradually, and the possibility of stalling is reduced.

The present invention relates to a method and system for performing a data transfer between a shared memory (16) of a processor device (10) and a circuitry (20) connected to the processor device (10), wherein the data transfer is performed by triggering a DMA transfer of the data to the processor device, adding the DMA transfer to a transaction log, and providing the transaction log to the processor device, when the transaction log has reached a predetermined depth limit. The processor device is then informed of the DMA transfer of the transaction log, so as to be able to validate the transferred data. Thereby, significant background data movement can be provided without introducing high core overheads at the processor device (10).

In one embodiment, a method for operating a memory management system concurrently with a processing pipeline is disclosed. The memory management system can fetch and effectively load registers to reduce stalling of the pipeline because the disclosed system provides improved data retrieval as compared to traditional systems. The method can include storing a memory request limit parameter, receiving a memory retrieval request from a multi-processor system to retrieve contents of a memory location and to place the contents in a predetermined location. The method can also include determining a number of pending memory retrieval requests, and then processing a new retrieval request if the number of pending memory retrieval requests is at or below the memory request limit parameter.

A pipelined processor includes a branch acceleration technique which is based on an improved branch cache. The improved branch cache minimizes or eliminates delays caused by branch instructions, especially data-dependent unpredictable branches. The improved branch cache avoids stalls by providing data that will be inserted into the pipeline stages that would otherwise have stalled when a branch is taken. Special architectural features and control structures are supplied to minimize the amount of information that must be cached by recognizing that only selected types of branches should be cached and by making use of available cycles that would otherwise be wasted. The improved branch cache supplies the missing information to the pipeline in the place of the discarded instructions, completely eliminating the pipeline stall. This technique accelerates performance, especially in real-time code that must evaluate data-dependent conditions and branch accordingly.

The invention discloses a control method of an air conditioner. The control method of the air conditioner comprises the following steps that when a starting instruction of the air conditioner is received, a standby mode is started, an outdoor ambient temperature corresponding to the air conditioner is acquired, then whether the outdoor ambient temperature is less than a first preset temperature ornot is determined, a chassis temperature corresponding to an outdoor side fan blade of the air conditioner and a motor temperature corresponding to the outdoor side fan blade of the air conditioner are acquired again when the outdoor ambient temperature is less than the first preset temperature, and then a compressor and a motor are controlled according to the chassis temperature and the motor temperature. The invention further discloses an air conditioner and a readable storage medium. The chassis temperature is detected to judge the icing condition near the fan blade, and the motor temperature is detected to judge the possibility of motor stalling, the operation control of the motor and the compressor is realized, the risk that the fan blade is damaged due to the fact that the fan bladecollides with ice or the motor is burned caused by motor stalling during starting in cold weather is reduced, and the safety of the fan blade and the motor is effectively protected.

The invention discloses a primary draught fan automatic parallel method and system for a thermal generator set. The method comprises the following steps that whether a draught fan needs to be automatically in parallel is judged according to the running information of a primary draught fan of the set, when the primary draught fan is required to be automatically in parallel, an air door baffle interlocking logic of a primary air system is forced to be parallel, a load of a boiler and the primary air pressure are adjusted, and the automatic parallel condition of the draught fan is met; a target value of the opening degree of a movable blade of the primary draught fan which needs to be in parallel is calculated and input, and a target value of the opening degree of a movable blade of a runningdraught fan; after the draught fan is parallel, the draught fan current deviation value is calculated, and the draught fan is judged to be successful to be parallel. According to the method, manual operation of the draught fan parallel process can be reduced, the flow of the draught fan parallel process is solidified, and the main protection tripping risk of the boiler caused by the draught fan stopping, surge and wind pressure large fluctuation in the draught fan parallel process is avoided.

This disclosure relates to techniques for performing conditional handovers and cell re-selections along known routes. A cellular base station may select a conditional handover set for a wireless device. The conditional handover set may include information for multiple conditional handovers. The wireless device may receive the conditional handover set. The wireless device may perform conditional handover to at least a first cell indicated in the conditional handover set based at least in part on the conditional handover set.

The invention discloses a vortex generator, a fan blade and a manufacturing method of the fan blade. The vortex generator comprises at least one pair of grooves formed in the blade, and when airflow flows nearby the groove, high-energy vortex is generated under the function of the groove and flows downstream to disturb airflow on the upper surface of the blade. The vortex generator has the main functions of a current vortex generator, can generate enough vortex disturbance to restrain the flowing separation of the wing section surface, improves the lift-drag ratio of a wing section, improves the pneumatic performance of the blade, reduces the flowing noise of the blade, increases the annual energy output of a wind driven generator, and has the characteristics of being low in cost, high inreliability and the like.

The invention provides a tapered section vortex generator. The tapered section vortex generator is provided with a hollow structure with the two open ends; the first end and the second end of the vortex generator are both open ends, the end faces of the two ends are flush, the first end of the vortex generator is a flowing inlet end, and the second end of the vortex generator is a flowing outlet end; the area of the section, perpendicular to a central line, of the vortex generator is tapered from the first end of the vortex generator to the second end of the vortex generator; the inner profileand the outer profile of the vortex generator are in smooth transition from the first end of the vortex generator to the second end of the vortex generator; and the central line of the vortex generator is parallel to the flowing direction, and the outer profile of the vortex generator is fixedly bonded on the profile of a wind power blade. The invention further provides a mounting method of the vortex generator. According to the vortex generator, lift force of the wind power blade can be increased, the electric quantity is increased, and the vortex generator is especially suitable for wind fields of low wind speed zones and low air density areas.