174results about How to "Avoid time delay" patented technology

The invention provides a dynamic reactive current direct control method by a doubly-fed wind turbine generator set during a grid fault. The method includes the following steps: a, judging whether a doubly-fed wind turbine generator enters a low voltage ride through mode or not, b, in normal operation, adopting a double closed loop control mode with the power on the outer loop and the current on the inner loop for the wind turbine generator set, c, if a protective action is not triggered during the fault, performing direct current control by the wind turbine generator after the wind turbine generator enters the LVRT mode, and d, if the grid fault causes the overcurrent of a rotor current converter or the overvoltage of a direct current capacitor, after the current converter enters a lockout state, performing protective action by a crowbar to bypass the current converter until the set engaged time is over and a frequency converter is controlled again. The dynamic reactive current direct control technology by the doubly-fed wind turbine generator set during the grid fault can achieve that during the fault, the wind turbine generator set injects a reactive current into a power grid fast and provides voltage support, and helps the wind turbine generator set to achieve low-voltage riding through.

In order to solve the drawbacks in the prior art, a new technology scheme is provided in the present invention, in which relay stations are introduced to participate in the communication of multiple carriers. The relay station only relays the carriers with had wireless transmission characteristic and controls the transmission of those relayed carrier via a carrier which does not need to be relayed. The relayed carrier is generally a high frequency carrier and the carrier which does not need to be relayed is a low frequency carrier. The base station or the relay station determines a carrier which needs to be relayed for the relay station according to the channel conditions of each carrier. The technology scheme provided by the present invention divides a NLOS (Non-Line-Of-Sight) transmission into at least two LOS transmissions. Therefore, it is easy to extend high frequency carrier to cell edge etc. Meanwhile the mobile terminal does not need extra transmission power to transmit high frequency carrier, so that the fast consumption of the terminal battery power is avoided and the great radiation hazard to the human body is also avoided. The service data and the signaling etc. which has not been relayed will still propagate in the low frequency carrier, so that the time delay resulted from the relay is avoided.

The invention discloses business establishment control method and system for effectively improving the business establishment speed in a long-term evolution network as well as a terminal device. The business establishment control method comprises the following steps that: a UE (User Equipment) monitors a paging message from a network side under a state that RRC (Radio Resource Control) connection is limited, wherein the paging message indicates that a system message of the UE changes; the UE reads the changed system message according to the paging message and judges whether the RRC connection is limited or not according to the changed system message; and if the UE judges that the RRC connection is not limited, an RRC layer of the UE transmits a limitation release message to a Non Access Stratum (NAS). The invention can judge whether the RRC connection of the UE is still limited or not by monitoring the paging message from the network side and notice the NAS in time under the state that the RRC connection is not limited, thereby being capable of reinitiating a request of establishing the RRC connection to the network side as soon as position. The invention can effectively accelerate the progress of establishing corresponding business between the UE and the network side and improve the response speed of the LTE (Long-Term Evolution) network.

An apparatus and method are provided for determining a data rate by means of control information in a mobile communication system which includes a User Equipment (UE) and a Node B. The UE transmits data to the Node B, and the Node B transmits the control information to the UE. The data rate is determined by means of the control information and is used for transmission of the data by the UE. The apparatus and method comprise determining a preliminary data rate in consideration of a quantity of data waiting for transmission; comparing the preliminary data rate with a previous data rate used for previous data transmission; and determining the data rate according to a result of comparison so that the UE can transmit the data at the data rate.

An inlet port 15 is divided into a plurality of holes 15a, 15b, 15c, 15 by ribs 61a, 61b, 61c. For example, when liquid refrigerant is compressed within a compression chamber, the inlet valve 21 receives excessive load which is about to bend the inlet valve 21 largely toward the suction chamber side. However, the inlet valve 21 is supported by the ribs 61a, 61b, 61c, and therefore the inlet valve 21 is hardly bent, but the inlet port 21 is positively closed.

An image pickup apparatus for wireless-communicating with a camera accessory which periodically transits to a sleep state, transmits a change signal for changing the setting of a power saving state in an accessory apparatus, to the accessory apparatus in accordance with a first operation for instructing an image pickup preparation to decide an setting for image pickup or a second operation for instructing the image pickup based on the image pickup preparation operation being accepted by an operation unit of the image pickup apparatus, thereby efficiently suppressing stand-by electricity consumption and preventing a delay from occurring in timing when a predetermined process is executed between apparatuses.

A display device for displaying a cursor according to motion of an input device is provided. The input device comprises an input part which receives pitch angle information and yaw angle information corresponding to motion of an external input device; a computation part which computes a first relative angle corresponding to the information of the pitch angle and a second relative angle corresponding to the information of the yaw angle; a coordinate calculator which calculates a cursor coordinate value which gradually varies according to the changes of the first and second relative angles; and a display which displays a cursor on a position corresponding to the calculated cursor coordinate value. Thus, it is possible to avoid trembling of the cursor caused by noise.

The invention relates to a sieve mesh with adjustable sieve pore gaps. An edge frame is provided with a group of movable frames moving along an X shaft and a group of movable frames moving along a Y shaft; an upper beam which is uniformly distributed and made by each movable frame moving along the X shaft is respectively positioned between adjacent longitudinal rods, is parallel to the longitudinal rods and positioned in the same plane, and a lower beam of the movable frame slides in a guiding manner by a guide sleeve fixedly arranged on the edge frame; and an upper beam which is uniformly distributed and made by each movable frame moving along the Y shaft is respectively positioned between adjacent horizontal rods, is parallel to the horizontal rods and positioned in the same plane, and alower beam of the movable frame slides in a guiding manner by a guide sleeve fixedly arranged on the edge frame. The sieve mesh has reasonable design, convenient use, high sieving precision and highefficiency, is economical and practical, and can adjust the size of the sieve pore continuously; and the sieve mesh can adjust the size of the sieve pore in a certain range, is not limited by the specification when in use and can realize the multiuse effect with one mesh.

The invention relates to a P-CSCF fault processing method and system. The method includes the steps that a service-call session control function (S-CSCF) obtains a proxy-call session control function (P-CSCF) address; the S-CSCF searches for user devices (UE) corresponding to a fault P-CSCF according to the address of the fault P-CSCF address; the S-CSCF sends a reregistering indication message to a stand-by P-CSCF so that the stand-by P-CSCF can forward the reregistering indication message to the UEs, and the reregistering indication message comprises the address of the stand-by P-CSCF address corresponding to the UEs so that the UEs can conduct reregistering on the stand-by P-CSCF. According to the P-CSCF fault processing method and system, after the P-CSCF fails, all the UEs using the fault P-CSCF can be informed to be reregistered to a new P-CSCF in advance, so that smooth building of the voice long-term evolution (VoLTE) service is guaranteed.

An arrangement is provided for the wrapping of a bale. The arrangement has a drive for the introduction of a wrapping material into a baling chamber, a sensor for the detection of a physical size of a bale developing in a baling chamber, and a control arrangement connected with the drive and the sensor, to activate the drive based on the signals from the sensor. It is proposed that the control arrangement be operated to activate the drive looking ahead, based upon the detected growth rate in the size of the bale and the time delay between the activation of the drive and the exact time in which the wrapping material reaches the baling chamber, so that the wrapping material reaches the baling chamber when the size of the bale is equal to the desired size of the bale.

Being applicable to data transmission procedure, the disclosed method includes following steps: saving transmitted data and their memory address in main buffer as well as ID of data packet in given sending sequence; receiving negative reply message, in which ID information of error data packet can be obtained; based on distance between ID information of error data packet and ID of data packet in given sending sequence to obtain memory address of the error data packet in main buffer; retransmitting error data packet. The invention stores information of data packet self and information of memory address of data packet respectively; and looks up memory address of error data packet in main buffer corresponding to distance or difference value between data packet Ids directly without need of querying procedures including comparing, matching etc. The invention increases speed of automatic retransmitting procedure, reduces time delay so as to obtain QoS of data transmission.

The invention relates to a hybrid drive device (1) for a motor vehicle. The hybrid drive device has a motor (3) which is provided with a rotor (4) and a stator (5). The rotor (4) has a separating clutch (K0) in which a drive shaft (6) driven by an internal combustion engine. The drive shaft (6) is coupled to the rotor (4) by means of the separating clutch (K0). At least one transmission input shaft (8, 9) is coupled to the rotor (4) via a friction clutch (K1, K2). The separating clutch (K0) and at least one friction clutch (K1, K2) are arranged in a common wet chamber (36). A coolant supply system (17) comprises a coolant pipe (18) for supplying the wet chamber (36) with a coolant (27), and wherein the coolant pipe (18) is connected into the wet chamber (36). The coolant pipe (18) accesses to the separating clutch (K0). The coolant (27) is guided and particularly can be pressed into the separating clutch (K0). Therefore, the delay for supplying the coolant (27) to the separating clutch (K0) can be prevented.

Provided is an apparatus for adjusting the phase difference between different phases in a power line communication (PLC) system. The apparatus includes a power signal blocking unit blocking a power signal and allowing a data signal to pass between two different phases on three-phase power lines; and a data signal delaying unit delaying the data signal by the phase difference between the two different phases. Accordingly, it is possible to prevent data collision and a time delay in data transmission between different phases by employing the phase adjusting apparatus in a PLC system, thereby improving the performance of PLC.

A precision machine vision inspection system and method for increased inspection throughput. The vision inspection system includes a movable stage for scanning and measuring selected workpiece features. In prior systems, conventional interspersing of image processing and inspection operations with image acquisition operations required stopping and starting the stage motion during image acquisition, necessitating associated delays or wait-states in various operations. Such delays are avoided in this invention by acquiring images continuously, with a timing that is independent of image inspection operations, so that delays and wait-states are avoided. In addition, continuous stage motion is combined with a strobe lighting feature during the image acquisition operations to acquire blur-free images at a high rate. Improved image acquisition and image analysis routines including these features are created and stored by the system.

The embodiment of the invention provides a speckle pattern-based structured light camera row deviation automatic detection method and device. The method comprises the following steps: extracting a speckle pattern of a test object as a test pattern; extracting a depth map and a saliency map corresponding to the test map; further determining a saliency mask corresponding to the saliency map; processing the saliency mask through flooding filling to obtain an extended saliency mask used for identifying an extended salient region in the saliency map; determining that the total number of the pixel points with the depth values in the corresponding region of the depth map in the extended salient region of the extended saliency mask identifier is the effective number of the depths; and finally, judging whether the structured light camera to be detected has row deviation or not based on the effective number of the depths and the total number of the pixel points in the extended salient region. According to the method and the device provided by the embodiment of the invention, whether a test speckle pattern shot by a to-be-tested structured light camera has the row deviation or not can be quickly and automatically detected, and time delay caused by re-calibration when the camera is used each time is avoided.

The embodiment of the invention discloses a system time synchronization method and device. The method comprises the steps that a bottom drive module of a client assigns the sending time of an NTP (Network Time Protocol) request message to an origin timestamp T1 of the NTP request message; the bottom drive module of a server takes the time of receiving the NTP request message by the server as a receive timestamp T2; the bottom drive module of the server assigns the sending time of an NTP response message to a transmit timestamp T3 of the NTP response message; and the bottom drive module of the client takes the time of receiving the NTP response message by the client as a destination timestamp T4. It follows that according to the time in the timestamps, the time delay of transmitting the messages between an NTP module and the bottom drive modules is avoided, the consistency between the client time and the server time is improved, and the problem that the client system time oscillates continuously in a traffic instable environment is avoided.

Systems and methods control a multimedia call/service in a communication system between mobile stations that exist in the same network. A method of controlling the multimedia call can initiate a radio call in a mobile station, recognize a multimedia call service option transmitted from the mobile station, set up the radio call via a base station where the receiving mobile station is located by using the multimedia call service option and the receiving telephone number, confirm in the receiving mobile station and notify a receiving user. The multimedia call between the originating/receiving stations is set up after the radio call. Therefore, the systems and method according to the invention can process the multimedia call only through a base station and a mobile switching center without passing through an inter-working module or a packet data serving node in the mobile communication system.

The invention provides a spectrum prediction switching method based on the transfer learning strategy. The method comprises the following steps: dividing a frequency spectrum switching range of a secondary user SU into N + 1 PU channels which are not overlapped with each other, and sequencing the N PU channels which are not occupied by the secondary user SU from small to large according to a central frequency, phi i being an ith PU channel, and i being a positive integer; dividing each time slot of the HCRNs system into the following sub-steps: dividing each time slot of the HCRNs system intosub-time slots and sub-time slots; the method comprises the following steps of: selecting M idle channels capable of enabling a secondary user SU to be subjected to frequency spectrum switching accessas the ith idle channel from N PU channels by a base station SBS corresponding to the secondary user SU through frequency spectrum prediction sensing in a frequency spectrum sensing TS time period according to a frequency spectrum sensing TS, a switching acknowledgement TACK and a transmission stage TD; and detecting whether the secondary user SU receives an acknowledgement signal indicating thatthe spectrum switching is completed within the switching acknowledgement TACK time interval, and ending the spectrum switching process when the acknowledgement signal is detected. According to the invention, in the HCRNs time slot, the switching confirmation TACK link is added, so that the robustness of frequency spectrum switching is ensured.

A waveform reconstructor is utilized in the read channel of an optical storage system in order to produce a high speed and reliable data output. Generally speaking, the waveform reconstructor provides readout signals from the optical storage media without utilizing a phase locked loop. In order to accomplish this, readout signals are first converted to digital signals, then provided to a digital equalizer for further signal conditioning. This equalizer use provides several advantages not available when PLL designs are utilized. Readout samples are then processed to determine a phase error, as compared with an ideally sampled signal. Once determined, this phase error allows for the reconstruction of the waveform, to create an output which is consistent with one which would have been sampled at precisely the correct time. The waveform reconstructor manages the calculated samples to determine whether actual asynchronous sampling is inconsistent with the anticipated samples. In order to make adjustments, where necessary, samples may be adjusted, inserted and/or skipped in order to accommodate for the calculated phase error. Following this processing, a reconstructed signal is then provided to a channel bit decoder for appropriate decoding of the bit stream.