776results about How to "Reduce switching times" patented technology

A two-phase electrophoretic medium comprises a continuous phase and a discontinuous phase. The discontinuous phase comprises a plurality of droplets, each of which comprises a suspending fluid and at least one particle disposed within the suspending fluid and capable of moving through the fluid upon application of an electric field to the electrophoretic medium. The continuous phase surrounds and encapsulates the discontinuous phase. The discontinuous phase comprises at least about 40 percent by volume of the electrophoretic medium.

When switching sources, resolutions or refresh rates in a video distribution network, switching times are reduced by maintaining video lock and security authentication between a video switcher and a video sink. The scaler maintains video lock and security authentication by continuing to generate video timing data during switching events. The scaler also facilitates an aesthetically pleasing transition by generating image content data prior to and after the switching event.

The invention relates to a method, a device and a system for data transmission, network equipment and terminal equipment. The method for data transmission is applied to the terminal equipment and comprises that the terminal equipment is set to be at a first inactive state or a second inactive state when the terminal equipment does not need to send uplink data; the terminal equipment does not monitor paging messages under the first inactive state, monitors paging messages at a preset first monitoring time or first monitoring number of times under the second inactive state and does not monitor the paging messages beyond the first monitoring time or first monitoring number of times, thereby saving the power consumption of the terminal equipment, and saving the electricity consumption; when the terminal equipment needs to send the uplink data, the terminal equipment is set to be at a connection state, and the uplink data is sent when the terminal equipment updates system information; and downlink data cached by the network side equipment when the terminal equipment is under the first inactive state or the second inactive state is received, thereby ensuring transmission of the uplink data and the downlink data.

Modular device and method for carrying out experiments in parallel on process substances to develop technical methods, comprising at least a multiplicity of individual reactors which are controllable independently of one another said reactors being comprised of pressure-tight chambers having separable sample vessels, and optionally, stirring devices, heating instruments, cooling instruments, or both, a monitoring unit for monitoring or controlling at least the pressure and the temperature in the individual reactors, pressure-tight lids having independent feed lines and optionally independent discharge lines for individual process substances; a plurality of the lids being simultaneously sealable upon the rectors by a common sealing means (11).

The invention discloses a control method of a four-phase permanent magnet fault-tolerant motor. In the method, a control mode can be automatically decided according to the diagnosed situation of a system failure; when the system is at a normal state, an SVPWM control is adopted; when the system has a phase-lacking failure, a fault-tolerant torque control is adopted; different fault-tolerant control proposals are adopted according to different types of phase-lacking failures. The control method realizes that the four-phase permanent magnet fault-tolerant motor can operate with high performance under the normal condition and the phase-lacking condition, overcomes the deficiency that the stable performance of the system when in normal working is reduced in the traditional fault-tolerant control system which adopts current for regulating PWM for realizing current tracing for the convenience of fault-tolerant control, establishes a mathematical model of the four-phase permanent magnet fault-tolerant motor under a rotating coordinate system, successfully applies an SVPWM strategy to the four-phase permanent magnet fault-tolerant motor and enhances the dynamic and static performances and reliability of the control system of the four-phase permanent magnet fault-tolerant motor.

The invention relates to a controller of full-power alternative-direct converter used in wind generation, wherein the alternative-direct converter is formed by network converter and the convert of generator; the used generator is a permanent-magnetic generator; the rotor is in permanent-magnetic structure, without external magnetic activate power supply; two convert loops both uses the PWM converters operating in four quadrants, based on full-control element, which can improve the dynamic response, reduce cost and impact, realize bidirectional transmission of electricity, and realize generating via power factor sine wave current parallel network; and the invention uses improved direct torque technique to control the converter, to confirm the sine wave change of input current at the stator, with quick response, low vibration, torque dynamic control and wide speed adjust range.

The invention relates to a time slot optimization-based double-layer satellite network routing method, so as to solve the problems that routing protocol overhead in the traditional method is large, an LEO satellite is hard to be connected with a GEO satellite in a polar region, and temporary link breaking of a polar orbit satellite between polar region orbits is not considered. The method comprises steps: (1) a 3GEO+66LEO double-layer satellite network model is built; (2) a covering domain grouping + orbit plane clustering-based satellite grouping management method is applied to determine a control relationship between an upper layer of satellites and a lower layer of satellites; (3) according to the control relationship between the upper layer of satellites and the lower layer of satellites, time slot division and optimization are carried out on a satellite operation cycle; (4) on the basis of location prediction routing algorithm, the GEO satellites calculate a routing table for the LEO satellites; and (5) the first step to the fourth step are combined, and routing updating is carried out when each time slice starts. The method belongs to the field of satellite communication.

The invention discloses a method and a device capable of judging whether a terminal is switched between two wireless networks. The method comprises the following steps: judging whether the signal intensity of a first wireless network on the position of the terminal which is accessed to the first wireless network satisfies a first switching condition, if does not satisfy, judging not to switch; otherwise, judging whether the switching times in a first period satisfy a second switching condition, if does not satisfy, judging not to switch, and otherwise judging the terminal to be switched. The invention further discloses a method capable of judging whether the terminal is switched from the second wireless network to the first wireless network, and the device capable of judging whether the terminal is switched between the two networks. The signal strength is used as a first condition to judge whether the terminal is switched between networks, when the switching conditions are satisfied, the switching times in unit time are used for deciding whether to be switched, so that the ping-pong switching phenomena between different networks are reduced, and energy consumption and network source cost brought by the terminal are reduced.

The invention discloses a mobility management method and a system of a user terminal along a given line. The invention reduces unnecessary measurement, avoids the disordered reselection or switching of a side cell and improves the efficiency of UE mobility management by setting a proper adjacent cells list and decides the reselected or switched target cell according to the UE movement direction and improves the accuracy of the UE mobility management. At the same time, the invention separates a private network covered by the given line from a common public network, enlarges the coverage range of each private network cell by adopting RRU and the RRU cell merging technology of different types and makes the cell coverage thereof accord with the linear shape of scenes along the given line in order to reduce the times of the cell reselection and switching.

The invention relates to a thread group address space scheduling and thread switching method under a multi-core environment in the technical field of computers, wherein a thread grouping strategy is introduced to aggregate potential threads which can be benefited through CPU core distribution and scheduling order arrangement, the address space switching frequency in the scheduling process are reduced, and the Cache hit rate is improved, thereby improving the throughput rate of a system and enhancing the overall performance of the system; adjustment can be flexibly carried out by adopting a thread grouping method according to the characteristics and the application characteristics of a hardware platform, so that thread group division adapted to a specific situation can be created; and the method also can be combined with other scheduling methods for use. In the invention, a task queue is equipped for each core of a processor by grouping the threads, the threads with scheduling benefits are sequentially scheduled, and the invention has the advantages of less scheduling spending, large task throughput and high scheduling flexibility.

The invention relates to a configuration method and system used for a satellite-bone SRAM (Static Random Access Memory) type FPGA (Field Programmable Gate Array) working on track for a long time. The method comprises the following steps: electrification: a delay configuration strategy is adopted for the FPGA to avoid configuration errors caused by power supply fluctuation generated at the moment of the boot; configuration process monitoring: the configuration condition of the FPGA is monitored by a DSP (Digital Signal Processor), and when the configuration of the FPGA is monitored to be normally completed, the FPGA is informed of entering a normal measurement state by the DSP, and an on-line reconfiguration step is started if the configuration of the FPGA is monitored to be not completed in time; reconfiguration: a low-level pulse larger than 300ns is controlled to be applied to a configuration reset pin of the FPGA by the DSP under the condition of uninterruptible power supply, and then the configuration process is automatically completed by the FPGA; normal working process monitoring: whether the configuration of the FPGA is correct or not is monitored regularly by the DSP in a normal working process, and FPGA on-line reconfiguration is started by the DSP if the configuration of the FPGA is wrong; and regular reconfiguration: a triple modular redundancy design is adopted for the FPGA, and is matched with the regular reconfiguration to improve the reliability of the FPGA.

The invention relates to the field of internet, in particular to a multi-webpage rendering, distributing and interaction control device of an internet browser. A webpage renderer and a webpage presenting device are separated in a process of a computer operating system, and on the basis, the webpage renderer and the webpage presenting device are controlled respectively, so that webpages of multiple sites are rendered simultaneously by a renderer end, and multi-way complex displaying of the multiple webpages is achieved by special window layout built at a presenting end. The device has the advantages that free zooming control for rendering portion of webpage content is achieved by optimizing and modifying the renderer; display modes of parallel, overlapped and local zooming for multiple webpages are achieved by controlling the window layout of the presenting device, and accordingly the efficiency in webpage browsing by users of the internet browser is improved, user experience is effectively improved, and efficacies of computer hardware in internet data accessing and presenting are given to full play.

The invention relates to a control method for an auxiliary switching tube of an active clamp flyback converter. In the flyback converter, severe energy loss and voltage spike of a main switching tube are caused due to leakage inductance of a transformer and leakage inductance of circuits. The conventional solution mainly comprises methods for solving the problems by using residual current device (RCD) clamp, liquid crystal display (LCD) clamp and active clamp, wherein an active clamp circuit can effectively recover leakage inductance energy and obviously improve the efficiency. The invention provides a novel control method on the basis of the conventional active clamp flyback converter topology. In the conventional control method, a primary side switching tube is in complementary conduction with an auxiliary switching tube in each period; and in the control method, the primary side switching tube is switched on in each period, the auxiliary switching tube is controlled by setting voltage of a clamp capacitor in the clamp circuit, and when the voltage of the clamp capacitor reaches the set value, the auxiliary switching tube is switched on. Compared with the prior art, the method has the advantages that: the switching loss of the auxiliary switching tube can be reduced; and more importantly, the efficiency of the circuit can be greatly improved under a light load, and the no-load loss is reduced.

This invention discloses a mobile communication base station and a beam switch method based on a beam switch intelligent antenna. In the up link time step, a base band control unit controls a send / receive switch at the receiving position, the received data on an antenna array enters into the receiving unit to be amplified and filtered via a digital phase shifter array and a power divider / synthesizer and demodulated and sent to the base band control unit. At the down link time step, the base band control unit controls the send / receive switch at the emit position, and sends the signal frame to be emitted to the modulation unit for modulation to be amplified by the emit unit then to be sent to the antenna array via the power divider / synthesizer, the digital phase shifter array, at the up and down link time step, the base band control unit should send the beam number to a conversion unit for timely decoding to generate a true control position then to be sent to the phase shift array to realize beam switch.

The method includes steps: (1) network side sets up threshold value of position for mobile station; and informing the set up threshold value of position to mobile station; (2) mobile station monitors and determines whether own position reaches to the threshold value of position in step (1) in real time; when reaching the threshold value of position, mobile station makes report to network side; (3) after receiving report in step (2), network side switches mobile station between adjacent cells. Based on accurate position, the invention makes mobile station switch between adjacent cells.

The invention relates to a dynamic spectrum access method with a network cognition ability, belonging to the technical field of wireless communication. The dynamic spectrum access method comprises the following steps of: (1) channel allocation: available spectra are segmented into a series of frequency bands, the frequency bands are different in bandwidth and transmitting ranges, and the frequency bands are channels; each channel is completely orthogonal, and a secondary user can use multiple channels at the same time; when several users use the same channel at the same time within a certain range, conflicts and interference occur; and the positions of all users are permanent; (2) channel access: in a cognitive wireless network, the secondary users fully utilize channels not used by primary users, i.e. the secondary users take full advantage of idle time slots of channels allocated to the primary users; and the primary users using the channels do not take the existence of the secondary users into account by using a second-order Markov Model; and (3) channel switching.

The invention relates to a low voltage load online phase modulation device and a phase modulation method thereof. According to the invention, optimization selection is performed to phase sequence state combination of electric load of users in a power distribution area, and then the electric load of the users is switched freely among phases A, B and C via a controllable switch, so that loads of the three phases of the power distribution area can be balanced. The low voltage load online phase modulation device fully integrates advantages of a mechanical switch and an electronic switch, so that the function of zero passage seamless switching of voltage and current can be realized, the impacts on a low voltage power grid and the electric load of the users are avoided, and the reliability of power supply and the voltage quality are guaranteed. The low voltage load online phase modulation device ensures that the load of the three phases of the power distribution area realizes minimum unbalance degree, the switching times of the switch is minimum, and the service life of the low voltage load online phase modulation device is improved. The low voltage load online phase modulation device has the function of three-phase load adjustment, and moreover, has functions of fault protection for over-current and over-voltage and leakage protection.

The invention discloses a self-adaption switching method for a fast terminal in a satellite network and belongs to the technical field of the satellite communication. The method comprises the steps of finding visible satellites, constructing a two-dimensional mobile model, calculating the remaining service time of the visible satellites one by one, selecting a visible satellite as a target satellite which has a vacant channel resource and has the longest remaining service time, and establishing a communication link with the new target satellite. The two-dimensional mobile model does not depend on users' historical movement data, and therefore a very large storage space is not needed; the newly provided two-dimensional mobile model is universal, not only is suitable for calculating the remaining service time of fast terminal users, but also can be used for analyzing the remaining service time of common low-speed users, and self-adaptation switching demands of two types of users are satisfied; besides, the self-adaptation switching strategy can not only be applied to a single-layered satellite network model, but also can be used for a double-layered satellite network model, and the movement scenes are more universal.

The invention provides a method and device for controlling video shooting, and relates to the field of video images, wherein facial images of a speaker can be reserved, the number of times of video switch can be reduced, transition between the images is close, and an output video is smoother. The method comprises the following steps: when a first speaker talks, a first video camera device is controlled to shoot a video of the first speaker; when a second speaker replaces the first speaker and serves as the current speaker, a second video camera device is controlled to shoot a video of the second speaker, wherein the second speaker is a next speaker who stands at a position different from the first speaker; when speakers change later, the first video camera device and the second video camera device are controlled to alternately shoot a video of the current speaker; the video of the current speaker is output after being successfully received. The method and device for controlling video shooting are applied to video conferences.

The invention discloses a long-term evolution system self-adaptation frequency deviation precorrection method under the environment of a high-speed rail. The long-term evolution system self-adaptation frequency deviation precorrection method under the environment of the high-speed rail is characterized by including the following steps: (1) distributing stations along railway by adopting the mode of a baseband processing unit (BBU) and a remote radio unit (RRU), transforming an uploading radio-frequency signal received by each RRU into a baseband signal and sending the baseband signal to the BBU, (2) conducting least squares (LS) channel estimation by the BBU according to the baseband signals sent by different RRUs based on an uploading reference signal, (3) calculating uploading frequency deviation of different user data correspondingly received by each RRU according to an LS estimated value on the reference signal. The long-term evolution system self-adaptation frequency deviation precorrection method under the environment of the high-speed rail is capable of increasing coverage area of single cell along the railway of long term evolution and LET-A system, reducing switchover and improving success rate of user access.

The invention provides a multiple-input multiple-output (MIMO)-orthogonal frequency division multiplexing (OFDM) cognitive radio communication method. A radio-frequency module outputs intermediate-frequency data which is used for spectrum detection to determine whether a spectrum is an idle spectrum or not, if so, optimum spectrum analysis and channel estimation are conducted to determine the characteristic of the spectrum, then optimum spectrum allocation is conducted to determine routing lines for information transmission, and when a master user requires to use the current frequency band, other routing lines are selected and used for data transmission; a cognitive module transmits a control signal to the radio-frequency module, wherein the control signal is used for setting the parameters of the secondary frequency variation of the radio-frequency module and setting the communication frequency band of a data transmission module; and each cognitive user has two transmitting and receiving antennas which are used for transmitting and receiving data, and signaling information is transmitted between the cognitive module and the data transmission module and is used for selecting transmission lines and proper transmission power. The method has the advantages that the spectrum utilization ratio is improved, the channel switching times are reduced, the data transmission quality is improved and the goal of stably transmitting cognitive data to the cognitive users is achieved.

The embodiment of the invention provides a link switching method under a high-speed motion state, a vehicle-mounted AP and a system. Signal strength of a trackside AP is obtained, wherein the signal strength of the trackside AP is monitored by the vehicle-mounted AP according to a preset monitoring rule; whether a main trackside AP which sets up bridging with the vehicle-mounted AP meets the following conditions at the same time or not is judged and the following conditions are that the signal strength of the main trackside AP is less than a preset switching threshold value; the signal strength of the main trackside AP is less than that of a standby trackside AP of the vehicle-mounted AP; the signal strength difference between the main trackside AP and the standby trackside AP is larger than the preset difference threshold value; if the conditions are met, the standby trackside AP is updated to be the main trackside AP, and the vehicle-mounted AP sets up bridging with the updated main trackside AP. The problem of data packet dropout caused by frequent link switching in the prior art is solved. The link switching method under the high-speed motion state relates to the technical field of network communication.

The invention discloses an antenna switching device and method, and a mobile terminal. The device comprises a sensing module and a switching module, the sensing module comprises a sensing unit, wherein the sensing module is used for sensing change information of stray capacitance generated when a limb approaches to the sensing unit through the sensing unit, and determining a shielding state of an antenna system according to the change information of the stray capacitance; and the switching module is used for judging whether the signal of a current working frequency band is deteriorated, and executing an antenna switching action according to the shielding state when the signal of the current working frequency band is deteriorated. Therefore, the situation that the antenna system is shielded when the mobile terminal is held on a left hand or a right hand can be detected, the antenna is switched accordingly to keep the balance and left and right hand performance of the antenna and improve the network access experience and call experience when the mobile terminal is held on the hand of a user. Moreover, the antenna switching action is executed only when the signal of the current working frequency band is deteriorated, thereby reducing the switching times, reducing the energy consumption and improving the stability of the system.

The invention discloses a multi-vehicle mounted station cooperation cell switching method for train-ground communication under a high-speed moving environment. The first scheme comprises the following steps of: arranging a vehicle mounted station at the front end and the rear end of a train, wherein the two vehicle mounted stations are mutual communication backups; applying a communication resource for the vehicle mounted station at the rear end while switching the vehicle mounted station at the front end; directly switching to the communication resource applied by the vehicle mounted station at the front end while switching the vehicle mounted station at the rear end; or switching the vehicle mounted station at the rear end by directly using available information acquired by the vehicle mounted station at the front end. The second scheme comprises the following steps of: switching with only the vehicle mounted station at the front end and performing data communication with only the vehicle mounted station at the rear end; applying the communication resource for the vehicle mounted station at the rear end and recording the switching position while switching the vehicle mounted station at the front end; and directly switching to the communication resource applied by the vehicle mounted station at the front end while the vehicle mounted station at the rear end reaches the switching position. The method has the advantages of short switching time, uninterrupted communication during the cell switching and capability of meeting the requirements of the train-ground communication under the high-speed moving environment.

The present invention relates to a piezoelectric bimorph switch, specifically a cantilever (single clamped beam) switch, which can be actively opened and closed. Piezoelectric bimorph switch are known from the prior art. Such a switch may be regarded as an actuator. Actuators are regarded as a subdivision of transducers. They are devices, which transform an input signal (mainly an electrical signal) into motion. Electrical motors, pneumatic actuators, hydraulic pistons, relays, comb drive, piezoelectric actuators, thermal bimorphs, Digital Micromirror Devices and electroactive polymers are some examples of such actuators. The switch of the invention comprises piezoelectric stack layers (121, 122), which form a symmetrical stack, wherein an electric field is always applied in the same direction as the poling direction of the piezoelectric layers.

The invention discloses a recognition-based access network selecting method, mainly used for solving the problems that the switching between networks is frequent and the utilization of network resources is unreasonable because the mobility of a user in a wireless local area network and a present load condition of a network are not comprehensively considered in a conventional method. The method comprises the following steps: utilizing a honeycomb network to periodically forecast the number of users requesting access in a honeycomb cell and a WLAN (Wireless Local Area Network) cell and an overall distribution status of mobility of the users in the WLAN cell; with an optimal network property as a target, calculating an optimal access decision threshold; and when a new service request is in the WLAN cell, comparing a shift-out probability of the users with a selecting decision threshold of an access network by the honeycomb network and informing the users of selecting a corresponding network for access according to a comparing result. The method is adapted to the change of a network environment, the switching frequency between the honeycomb network and the WLAN network is reduced and a network throughput is increased.

The invention provides a dynamic networking method and equipment for network access points. According to the embodiment of the invention, the traditional network-centered idea is changed into the user-centered idea and services are provided for users, thereby preventing the user from sensing the network environment frequently and providing a data transmission service of the user in a low-speed or static mode by an APG. Moreover, during the movement process of the user, the user service transmission can be realized based on dynamic APG updating and AP cooperation in the APG. Therefore, the number of times for user switching can be reduced and user switching in the APG does not need to use the core network, thereby reducing the signaling load of the core network.

The invention discloses a power reversal control method and a power reversal control device for a hybrid direct-current power transmission system. The hybrid direct-current power transmission system at least comprises double poles, wherein one pole is a conventional direct-current power transmission system (LCC-HVDC) based on a thyristor technology, the other pole is a flexible direct-current power transmission system (Flexible-HVDC) based on a full-control type power electronic device, and each pole is an independent direct-current power transmission sub system. In a power reversal process, active power conveyed by the hybrid direct-current power transmission system is continuously changed to be negative from positive, and net reactive power of a convertor system at each end of the hybrid direct-current power transmission system is kept constant in the power reversal process. The automatic power reversal method can effectively reduce interferences to an interconnected alternating-current network and realizes stable direct-current power reversal.

The invention provides a method for selecting an access point by vehicle-mounted WiFi (Wireless Fidelity) equipment, belonging to the field of communication. The method comprises the following steps of: firstly, periodically detecting signal intensity of peripheral APs (Access Points) by the vehicle to obtain the signal intensity of the peripheral APs; converting a detected AP signal intensity value into a distance value for each AP according with the specified number of detection records, and further pre-estimating a position of each AP to obtain a prediction coordinate of the AP; then calculating meeting connection time of each AP according to the prediction coordinate of the AP; and finally associating the APs with the longest meeting time. The method for selecting the access points can reduce disconnection frequency and a packet loss rate of the vehicle-mounted WiFi equipment access data transmission, and improve the stability of data transmission.