50results about How to "No significant increase in complexity" patented technology

Embodiments of the invention disclose a method and a device for forming an adaptive beam, equipment and a storage medium. The method comprises the following steps: acquiring a sound source direction and an audio stage at a current moment; determining a filter weight coefficient, a desired signal and a reference signal at the current moment; calculating according to a regularized adaptive filteringalgorithm or a traditional adaptive filtering algorithm of a cost function to obtain the filter weight coefficient of a next moment, or using the filter weight coefficient of the current moment as the filter weight coefficient of the next moment; and filtering an audio signal of the next moment based on the filter weight coefficient of the current moment. With adoption of a technical solution provided by embodiments of the invention, two adaptive algorithms with different noise suppression performances are combined according to sound source information are combined to obtain different filterweight coefficients for further filtering the audio signal, thereby solving a problem of directional voice damage while ensuring excellent nondirectional noise suppression performance, and improving robustness of the method for forming the adaptive beam.

The invention discloses a cooperation method used under the condition of multi-source single relay and based on compression forward pass. The cooperation method is characterized in that under the condition of multi-source single relay, multiple users use low-density parity-check codes with the same code length to code sent information; relay nodes adopt the combination technology of compression forward pass and network coding for cooperative communication; and destination nodes adopt joint iterative decoding algorithm to code received information and obtain information sent by a source. The method overcomes the problem that relay is interrupted during communication, and ensures that the relay always assists the communication during communication process; and meanwhile, with the method, certain diversity gain can be obtained through iteration decoding algorithm, so that the communication quality is improve and the communication resources are saved.

The invention discloses an SOGI based phase-locked loop free photovoltaic inverter control method in the imbalance power grid. The method comprises the following steps that Clark transformation is carried out on three phases of voltage signals Ea, Eb and Ec obtained by a sampling conditioning circuit to obtain components Ealpha and Ebeta in a rest frame; SOGI is used to carry out orthogonal treatment on the Ealpha and Ebeta to obtain a group of orthogonal signals Valpha1 and Valpha2 and another group of orthogonal signals Vbeta1 and Vbeta2; the orthogonal signals are separated to obtain positive-sequence voltage components Valpha+ and Vbeta+ and negative-sequence voltage components Valpha- and Vbeta-; a cosine signal costheta and a sine signal sintheta needed by rotation transformation areneeded according to relation between the phase angle theta of the positive-sequence fundamental wave voltage and the Valpha+ and Vbeta+; and a photovoltaic inverter is controlled in the synchronous coordinate system by using the sine and cosine signals, Valpha- and Vbeta-. Via the method, the photovoltaic inverter in the imbalance power grid can be controlled without a phase-locked loop, and thesystem structure is simple; and positive and negative voltage feedforward is introduced to inhibit grid-connected negative-sequence current, and the waveform quality of the grid-connected current in the imbalance power grid is ensured.

The present invention discloses a hierarchically-networked broadband trunking communication system and a point-to-point calling method thereof. The broadband trunking communication system comprises at least a first trunking core network, a second trunking core network and a third trunking core network; the first trunking core network and the second trunking core network are not only responsible for local trunking calling scheduling services, but also responsible for communicating with the third trunking core network; and the third trunking core network is not only responsible for local trunking calling scheduling services, but also responsible for trunking calling service control of the first trunking core network or the second trunking core network and trunking calling service control between the first trunking core network and the second trunking core network. The present invention also discloses a point-to-point calling method of the hierarchically-networked broadband trunking communication system.

The invention relates to a forming method of a diffusion zone, comprising the following steps of: forming a pre-doping layer on the surface of a semiconductor substrate, wherein doping ions are contained in the pre-doping layer; forming a protecting layer on the pre-doping layer; annealing the semiconductor substrate; and diffusing the doping ions in the pre-doping layer into the semiconductor substrate. In the invention, by replacing the traditional mode of injecting ions to dope the diffusion zone with a furnace tube thermal diffusion technology, the damage to the surface of the semiconductor substrate by ionic bombardment is avoided, foreign ions are ensured to be more evenly distributed in the diffusion zone, a surface lattice structure is improved and a subsequent technology is benefited. In the process, the technological flow is slightly regulated, the complexity is not obviously increased, the production cost is not obviously increased, and the productivity is increased to a certain extent.

Based on existing trigger with conditional preshoot structure driven by clock signal in low voltage swing, the invention makes following modifications: reducing a additional high voltage power supply in structure of simplified flip-latch in first stage; using two pieces of independent phase latch with same circuit parameters in single clock to form latch in second stage in order to ensure symmetrical output waveform; adding a scan and control circuit of having functions of enable control and scanning test. The invention also disclosed two CMOS triggers with modified structure: single end output, and synchronous reset. Under same testing condition, the invention saves more than 30úÑ power consumption, smaller circuit area and improved delay performance of circuit.

The invention relates to a self air-cooled rotor reluctance motor, and belongs to a reluctance motor. The motor comprises a rotor and a stator, salient-pole teeth of the rotor and the stator are oblique teeth in a structural shape of an axial-flow fan blade, a cylindrical surface using high center of the salient-pole teeth of the rotor as a radius and a lateral surface of the salient-pole teeth form a spatial intersecting line, a curve expanded by the intersecting line on a plane figure expanded by the cylindrical surface is arc-shaped, and the arc-shaped curve is decided by an air intake angle and an air outlet angle. During design, loss of the motor rotor is determined according to a design manual of the motor, and the air intake angle is determined according to air intake absolute speed, rim speed and relative speed direction calculated by a speed triangle at an air intake end; and the air outlet angle is determined according to pneumatic design. The shape of the salient-pole teeth of the stator is decided by the salient-pole teeth of the rotor. The self air-cooled rotor reluctance motor is suitable for reluctance motors with various structures such as a double-salient-pole motor, a switched reluctance motor and an inductor motor. The self air-cooled rotor reluctance motor can automatically dissipate heat of the rotor of the reluctance motor, reduce volume and weight of the motor, and optimize the size of the motor.

The invention provides a preparation method of monodisperse polymer / SiO2 nano composite particles. The method comprises the following steps of (1) dissolving a water-soluble non-ionic emulsifier into water so as to obtain an emulsifier aqueous solution; (2) dispersing hydrophobic SiO2 nano particles into part of monomers, and adding a co-stabilizer and residual monomers, thereby obtaining a monodisperse solution of the SiO2 nano particles, wherein the monomers are selected from at least one of styrene and acrylic ester compounds as shown in a formula (I); (3) adding the monodisperse solution of SiO2 into the non-ionic emulsifier aqueous solution, stirring for pre-emulsification so as to obtain a crude emulsion, performing ultrasonic treatment in an ice-water bath so as to obtain a monomer miniemulsion, adding a water-soluble ionic emulsifier into the monomer miniemulsion, introducing nitrogen to remove oxygen, and reacting in the protection of nitrogen so as to obtain the monodisperse polymer / SiO2 nano composite particles, wherein an initiator can be added through the following two modes: adding an oil-soluble initiator into the monodisperse solution of the SiO2 nano particles or adding a water-soluble initiator into the monomer miniemulsion. The formula I is as shown in the specification.

The invention relates to a method for designing a puncturing device based on key control in order to solve the problem that a conventional Turbo code puncturing device does not have code rate self-adaption and encryption functions. According to the method, an interleaver is associated with the puncturing device, firstly, the length of the interleaver is set as N, S is a natural number sequence with the length N, a random natural number arrangement S1 with the length N is generated by a Key, namely, S1=f (S, Key), the f refers to a random function, secondly, the overall bit number P needing to be deleted is calculated according to a code rate R, finally, a code bit sequence is punctured, code bits of sequence numbers smaller than or equal to P after mapping f in the S are deleted, and code stream is outputted. When in puncturing release, the sequence numbers smaller than or equal to the P after mapping f in the S are positioned at 0, the rest code bits are determined by input N-P long sequences, and the code stream with the length N can be released from puncturing.

The invention relates to a double-stator reluctance motor with a self air-cooled rotor, and belongs to a reluctance motor. The motor comprises a rotor, an internal stator and an external stator, internal and external salient-pole teeth of the rotor and salient-pole teeth of the internal stator and the external stator are oblique teeth in a structural shape of an axial-flow fan blade, and the oblique teeth of the internal and external salient-pole teeth of the rotor in the structural shape of the axial-flow fan blade are decided by an air intake angle beta=tan<-1>C / U and an air outlet angle alpha=tan<-1>C / (U-C2u), wherein C is air intake absolute velocity, U is rim speed, C2u is equal to Lu / U, and Lu is rim power. In order to keep electrical property of the motor invariant, shapes of the salient-pole teeth of the internal stator and the external stator are matched with structures of the internal and external salient-pole teeth of the rotor. When the rotor of the motor rotates, the axial-flow fan blade structure of the internal and external salient-pole teeth of the rotor and the axial-flow fan blade structure of the salient-pole teeth of the internal stator and the external stator generate air suction force together to introduce the air inside the motor to be exhausted by an outlet, so as to take away heat of the rotor of the motor and achieve self air cooling. Therefore, the size of the motor can be optimized, and volume and weight of the motor can be reduced.

The invention discloses a rail-to-rail operational amplifier which comprises an operational amplification input stage, a buck stage and an output stage, wherein the operational amplification input stage comprises a PMOS (P-channel Metal Oxide Semiconductor) input stage and an NMOS (N-channel metal oxide semiconductor) input stage; and the operational amplification input stage also comprises a mirror image input stage, wherein the mirror image input stage, the PMOS input stage and the NMOS input stage are input in parallel. On the premise that the circuit complexity is not obviously increased, the rail-to-rail operational amplifier can be applied to the 1.8V even lower power voltage conditions, the power consumption of the circuit is greatly lowered, and the design requirement of low voltage and low energy consumption can be satisfied.

The invention relates to a low-torque ripple reluctance motor with a self air-cooled rotor, and belongs to a reluctance motor. The motor comprises a rotor and a stator, a salient-pole tooth of the rotor is an oblique tooth in a structural shape of an axial-flow fan blade and is decided by an air intake angle, an air outlet angle and rotor length, and the structure of a salient-pole tooth of the stator keeps electrical property of the motor consistent with the prior double-salient-pole motor with an oblique rotor tooth. When the rotor of the motor rotates, the salient-pole tooth of the rotor generates an air suction force to introduce the air inside the motor to be exhausted by an air outlet, so as to take away heat of the rotor of the motor and achieve the aim of self air cooling. The low-torque ripple reluctance motor is suitable for the reluctance motors with various structures, which comprise a double-salient-pole motor, a switched reluctance motor, an inductor motor, and the like. The low-torque ripple reluctance motor can automatically dissipate heat of the rotor of the reluctance motor, reduce volume and weight of the motor, and optimize the size of the motor.

The invention discloses a utilization rate determination system and method and a terminal. The terminal comprises a parameter obtaining module used for obtaining operation parameters of detected equipment; a working state determination module used for determining the working state of the detected equipment according to the obtained operation parameters and a working state determination rule, wherein the working state determination rule includes a corresponding relation between a plurality of working states and a range of parameter values of the operating parameters; and a first communication module used for sending the determined working state to a utilization rate determination device, wherein the working state is regarded as a parameter for the utilization rate determination device to determine a utilization rate. The utilization rate determination system and method and the terminal of the invention can reduce the load of the utilization rate determination device, guarantee the real-time performance of utilization rate counting, reduce the hardware and software requirements of the utilization rate determination device and save the cost.

The invention discloses an utilization rate determination system and method. The system comprises a current sensor for generating an induced current signal according to the current of the power supply line of the device under test, an embedded terminal which is used for processing the induced current signal from the current sensor into a digital level signal, determining the actual current value of the power supply line of the device under test according to the digital level signal, determining the working state of the device according to the determined actual current value and the working state determination rule and reporting the determined working state, wherein the working state determination rule includes a correspondence relationship between a plurality of working states and a current value range, as well as a management device for receiving the working state reported by the embedded terminal and determining the utilization rate of the device under test according to the reported working state. The invention can reduce the burden of management equipment, decrease hardware and software requirements, and save costs.

The invention discloses an inverter parallel phase synchronization control method for power weighing, and belongs to the technical field of inverter parallel control. The method comprises the following steps: when standard sine wave of each inverter module passes zero, sending a negative pulse interruption synchronizing signal to an interconnection line respectively, carrying out weighing operation on the interruption synchronizing signal of each module by using power as a weight standard, adding a false module circuit into an interruption synchronizing circuit if the weight sum of all interruption synchronizing signals is even and the power sum of some modules is just half of the total power, and acquiring a common interruption signal when the weight sum of the interruption synchronizing signals in a low level is greater or equal to half of the weight sum of all interruption synchronizing signals. A system transmits the common interruption signal to each module through the interconnection line; and after receiving the common interruption signal, any module is enforced to send the standard sine wave from zero. The synchronization control function can be realized by a singlechip. The control method ensures high-precision phase locking synchronization of a standard voltage, and improves the reliability of the system.

The present invention discloses an audio power amplifier with two-way feedback and single power supply, which not only reduces the inhibition of low-frequency signals by the audio power amplifier, but also reduces the value of blocking DC coupling capacitance. In the technical proposal, the audio power amplifier comprises an audio amplification module, a first feedback path and a second feedback path. The audio amplification module comprises a first input end which is used for receiving input audio signals, a second input end which is used for receiving syntype reference voltage, a third input end which is used for receiving supply voltage, and an output end which is used for providing output audio signals; the first feedback path is connected between the output end of the audio amplification module and the inverted input end, and comprises a first resistance; the second feedback path is connected between the output end of the audio amplification module and the inverted input end, and comprises a second resistance, a capacitance and a third resistance which is used for regulating the gain of audio amplification. The audio power amplifier can be used in the field of audio power amplifier.

The invention relates to the technical field of frame synchronization. The embodiment of the invention provides a frame synchronization method and device for IEEE802.15.4g MR-OFDM in a large frequency offset environment. The method comprises the following steps: obtaining an IEEE802.15.4g MR-OFDM signal; according to the frequency offset range of the IEEE802.15.4g MR-OFDM signal and the subcarrier interval in the preamble sequence, mapping the possible offset position of each single-tone signal in the preamble sequence to a power window, wherein the power window comprises a plurality of subcarrier positions; superposing the power values of the power windows corresponding to all the single-tone signals in the leader sequence; determining a subcarrier position according to the superposed power value; and performing synchronization position correction on the determined subcarrier position in the range of the subcarrier interval to obtain a frame synchronization position. According to the implementation mode provided by the invention, the synchronization efficiency of the IEEE802.15.4g MR-OFDM signal in a large frequency offset environment is improved.

The invention belongs to the technical field of natural language automatic processing, aims to solve the problem of machine reading understanding more accurately, and discloses a method for performingmachine reading understanding by using a word vector introduced with semantic information, which comprises the following steps of: 1, expressing the context involved in a machine reading understanding model and words in the problem by using the word vector; 2, performing fine adjustment on the word vector by using Retrofitting to obtain a context sequence and a problem sequence expressed by the word vector; 3, coding: respectively coding the context and the problem sequence to obtain context representation and problem representation; 4, interacting the encoded context with the problem sequence based on iteration; and 5, generating an answer: extracting a starting position and an ending position of an answer fragment from the full-aware context obtained in the step 4. The method is mainlyapplied to machine automatic language processing occasions.

The invention discloses a method for optimizing a four-section Halbach array list attached permanent magnet motor. The magnetization angle of a first section and a second section of an N-pole permanent magnet is an included angle between the magnetization direction and the clockwise circumferential tangential direction; the magnetization angle of the third section and the fourth section of the N-pole permanent magnet is an included angle between the magnetization direction and the anticlockwise circumferential tangential direction; the magnetization angle of the first section and the second section of the S pole is an included angle between the magnetization direction and the anticlockwise circumferential tangential direction; the magnetization angle of the third section and the fourth section of the S pole is an included angle between the magnetization direction and the clockwise circumferential tangential direction; the ratio of the pole-arc coefficients of the second-section permanent magnet to the third-section permanent magnet of each pole is a certain value, and the rotor is matched with the corresponding stator to form a four-section Halbach permanent magnet motor. According to the invention, the radial air gap flux density fundamental wave amplitude of the motor can be improved, and the harmonic component of the air gap flux density is reduced, so that the output torque is improved, the torque density and the power density of the motor are improved under the condition of the same volume and permanent magnet consumption, and the electromagnetic performance is more excellent.

The invention proposes a high-performance low-delay extended TPC decoding method. The method combines a related metric value, the number of candidate code words and parity check bit to determine decision cord words of each row and each column of an input information bit block; if related conditions are not met, noise sound is relatively large, and results of hard decision are used as decision code words, hereby preventing error diffusion. After multiple times of iteration, a decoding method of input information is finally obtained. Compared with an originally adopted chase-2 algorithm, the decoding performance and throughput capacity are obviously improved, decoding delay is reduced, and the corresponding hardware complexity and calculated amount are not obviously increased.

The invention provides a key generation method based on position uniqueness information, which is improved on the basis of a hash function, and when the hash function fills input information, a chaotic sequence is introduced, an MD buffer area is initialized, and messages are processed by taking groups as units. The information filled each time can be randomly changed along with the change of the input positioning information, so that the defect that a hash function is easily attacked by a dictionary is effectively avoided; meanwhile, a plurality of control parameters are introduced, the change space of a key is increased, and the security of a key generation algorithm and the randomness of the generated key are improved; according to the method, the structure of the MD5 algorithm is not changed too much, so that the properties of irreversibility, initial value sensitivity and the like of the original MD5 algorithm still exist, the complexity of the improved algorithm is not obviously improved, and the operation time is relatively short.

The invention relates to a natural wind-cooled rotor double-stator low-torque ripple reluctance motor, which belongs to a reluctance motor. The motor comprises a rotor and inner and outer stators, wherein inner and outer salient-pole teeth of the rotor are titled teeth which are in the structural shape of fan blades of an axial-flow fan and determined by an air inlet angle beta equal to tan<-1>(C / U) and an air outlet angle alpha equal to tan<-1>(C / (U-C2u)), wherein C represents the absolute speed of inlet air, U represents rim speed, C2u is equal to Lu / U, and Lu is rim power. Salient-pole tooth structural shapes of the inner and outer two stators ensure the performance of the motor is consistent with that of the prior rotor titled-tooth inner-outer double stator double-salient pole motor. When the motor rotates, the structural shape of axial-fan blade of the inner and outer salient-pole teeth of the rotor and the structural shapes of axial-fan blade of the inner and outer salient-pole teeth of the inner and outer stators generate air suction force concertedly to draw the air into the motor and discharge the air through an air outlet to remove heat generated by the rotor of the motor, so the self-cooling of the motor is realized, the design of the motor is optimized, and the volume and weight of the motor are reduced.

The invention relates to the technical field of fuel cells, and particularly discloses a fuel cell thermal management system, which comprises a controller, a fuel cell, a circulating device, a heat exchange device, a medium compensation and storage device and a pressure adjusting device, the controller can compare pressure signals of the first pressure detection device and the second pressure detection device with a preset pressure target value to generate a pressure control signal; the pressure adjusting device can adjust the flow resistance of the circulating medium according to the pressure control signal. The invention also discloses a pressure regulation method of the fuel cell thermal management system. The fuel cell thermal management system provided by the invention can realize effective control of pressure.

The invention discloses a traffic monitoring video encoding method, which implements traffic monitoring video encoding based on vehicles and background databases, and can effectively remove the global redundancy existing in the traffic monitoring video in the time dimension after paying a certain storage space cost. In the end, the overall effect is to effectively improve the overall encoding performance of traffic surveillance video without significantly increasing the complexity of encoding and decoding.

The invention discloses an RS code coding method based on parity check precoding. The method comprises the following steps of: 1, constructing an RS code check matrix Hr based on parity check precoding; 2, performing elimination processing on the matrix Hr constructed in the step 1 to obtain an Hpre matrix; 3, independently carrying out Gaussian elimination on the Hpre matrix obtained in the step 2 to obtain a parity check precoding generation matrix Gpre-sys; 4, performing parity check pre-coding by using the generated matrix Gpre-sys obtained in the step 3, namely outer code coding to obtain a parity check pre-coding codeword row vector v; and 5, coding to obtain an RS code coding codeword row vector w based on parity check precoding. According to the method, the soft-decision decoding algorithm of the RS code is more suitable for engineering implementation, and the error correction performance of the RS code under the BP type decoding algorithm is obviously improved under the condition that the coding complexity is not obviously improved.

The invention discloses a three-dimensional measurement system and method for a surface of a reflective object and a storage medium. A first image, shot by a first camera, of a to-be-measured object and a second image, shot by a second camera, of the to-be-measured object are obtained, and the first image and the second image comprise stripe images reflected by the surface of the to-be-measured object; according to the first image and the second image, a height value and a gradient value of a first object point are obtained, and the first object point is an object point in an overlapping region of the view fields of the first camera and the second camera; an initial value of a first height value of a second object point is determined to be the height value of the first object point, the second object point is in an adjacent region of the first object point, and the second object point is in a non-overlapping region of a view field range of the first camera and the second camera; iterative processing is performed based on the initial value of the first height value of the second object point and a preset step length, and a gradient value of the second object point is determined; and the surface of the to-be-measured object is reconstructed according to the gradient values of all the object points to obtain morphology data of the to-be-measured object. Therefore, the measurement range is expanded.