448results about How to "Strong achievability" patented technology

The invention discloses a plurality of united observer based fault diagnosis and fault-tolerant control device and a method and belongs to the field of aerospace. The plurality of united observer based fault diagnosis and fault-tolerant control device comprises following modules of a fault injection module, a fault diagnosis module, a real time monitoring module and a hardware control module. According to the method, the problem that traditional observer based fault diagnosis methods are limited by conditions is mainly solved, the operation is simple, the implementability is high, and the method can be used for diagnosing faults of actuating mechanisms of a four rotor wing helicopter and verifying feasibility of state monitoring.

The invention discloses a method for controlling hybrid power urban buses. The method comprises the steps of off-line optimizing and on-line controlling. The idea of control strategy switching is put forward, driving reference working conditions targeting regions and more conforming to actual bus driving routes are established, off-line overall optimizing is carried out based on the working conditions, the optimum control effect can be achieved, and the problem that the dynamic planning cannot be applied to on-line and real-time control because the calculated quantity of the dynamic planning is large is solved. When the hybrid buses are driven actually, whether the similarities between the actual driving working conditions and the established driving reference working conditions and between the road prediction working conditions and the established driving reference working conditions are judged on line, if yes, real-time torque distribution is carried out on the hybrid power urban buses by calling dynamic planning optimum control parameters stored in a bus main controller, or otherwise, control strategies are switched, on-line and real-time control is carried out on the buses by adopting the fuzzy logic rule control strategy which is high in self-adaptability and realizability, and accordingly the control strategy adaptation is improved.

The invention discloses a minimum equivalent fuel consumption-based hybrid electrical vehicle control method, which comprises the following steps of: acquiring a nominal equivalence factor offline; acquiring signals; identifying working conditions; performing adaptive regulation; and performing optimum control. Under the condition of meeting the requirement of dynamic property, the minimum equivalent fuel consumption-based hybrid electrical vehicle control method is adopted, adaptive regulation can be performed according to an actual working condition, and the electric quantity balance of a storage battery is ensured, so that the performance and service life of the storage battery are ensured. The nominal equivalence factor is acquired through simulation calculation in the offline state, and calculated quantity for real-time control of the whole vehicle is reduced. In addition, different from a global optimal control method in which a future vehicle running working condition is required to be known (the future vehicle running working condition is unpredictable actually), the method has high implementability; and by the method, the real-time optimal energy management decision can be provided, the fuel economy of the whole vehicle is further improved, and the emission is reduced.

The invention discloses an optical detection device for corona discharge. An atmospheric ultraviolet window band imaging detection optical path thereof comprises a stray light shield, an atmospheric ultraviolet window band ultraviolet lens, an atmospheric ultraviolet window band band-pass ultraviolet filter, an ultraviolet image intensifier, a light cone, a CCD or CMOS area array image sensor, an image processing circuit and a first liquid crystal display which are arranged in sequence. A solar blind ultraviolet band non-imaging detection optical path thereof comprises a total emission mirror, a spectroscope, a solar blind ultraviolet band-pass filter, a solar blind ultraviolet lens, a multiplier phototube, a signal processing circuit module and a second liquid crystal display. The device has the main advantages that the corona detection data is more complete and reliable, and the failure level of corona discharge and discharge degree are convenient to be analyzed.

The invention provides a navigation satellite low-orbit monitoring constellation optimization design method. An existing technology foundation and a future technology development trend are fully considered, navigation satellite low-orbit monitoring constellation design requirements and constraint conditions are analyzed, a Walker-[delta] constellation and a sun synchronous regression orbit are selected, and an elevation criterion containing a monitoring station cover factor, a performance factor and a constellation orbit parameter is built at the same time, so a navigation satellite low-orbit monitoring constellation going through the optimization design has good monitoring performance. The optimization design of the navigation satellite low-orbit monitoring constellation can be effectively achieved according to the navigation satellite low-orbit monitoring constellation optimization design method brought forward in the invention, the technical scheme is scientific and optimal, and the navigation satellite low-orbit monitoring constellation optimization design method has high implementability; and the designed constellation can use the less total number of satellites to achieve a large monitoring station cover factor and a large performance factor.

The invention discloses a preparation method for a tea extract, belonging to the technical field of extraction of effective components of tea leaves. The preparation method comprises the following steps: firstly, carrying out low-temperature rapid freezing treatment on high-quality commercial tea leaves; then immediately crushing; then combining a high-voltage pulsed electric field (PEF for short) technology, an ultrasonic treatment technology and a low-temperature enzymolysis technology; and carrying out low-temperature extraction in a whole process. According to the preparation method for the tea extract, the loss of effective components, caused by high-temperature processing, is avoided, and the extraction rate of the effective components of the tea leaves is also improved. The process is simple and low in cost; the introduction amount of extraneous food additives, processing auxiliary agents and chemical substances is reduced; the natural nutritional ingredient and the flavor of the tea leaves are kept to the greatest extent, the low-carbon production is realized and the environment is protected.

The invention relates to a support protection mechanism of a foldable screen and a mobile terminal. The support protection mechanism comprises a middle support, side shells and side frames, wherein the middle support and the side shells are used for supporting the foldable screen when being unfolded, and the side frames are formed by separating the side shells from the middle support during folding. A containing cavity used for containing and protecting a folding area of the foldable screen is formed when the side frames on the two sides are folded; one side of each side frame is rotationallyconnected with the middle support, and the other side of each side frame is slidably connected with the corresponding side shell; a connecting rod is connected between each side shell and the middle support, and each connecting rod is rotationally connected with the middle support and the corresponding side shell. According to the support protection mechanism of the foldable screen, sliding grooves are ingeniously matched with the connecting rods, so that the overall mechanical structure is simple, reliable, high in implementability and low in manufacturing cost, and the containing cavity canbe reserved during folding to protect the flexible screen while the flexible screen is supported during unfolding.

The invention relates to a brushless direct current motor power inverter power-on self-test device and a self-test method. The brushless direct current motor power inverter power-on self-test device comprises three bridge arms consisting of six power tubes V1, V2, V3, V4, V5 and V6 and is characterized in that a resistor R1 is in parallel connection with the power tube V1 and then is grounded through a serial connection circuit of an R4 and an R7, a resistor R2 is in parallel connection with the power tube V3 and then is grounded through a serial connection circuit of an R5 and an R8, and a resistor R3 is in parallel connection with the power tube V5 and then is grounded through a serial connection circuit of an R6 and an R9. By means of the self-test device and the self-test method, state information of an inverter can be obtained before a motor operates. The faults of the power inverter of a brushless direct current motor are mainly classified into open-circuit faults and short-circuit faults of the power tubes, and power-on self testing is conducted on the inverter by adopting the self-test method and combining a fault detection circuit and control software.

The invention discloses a method for identifying internet application based on dynamic deep packet detection and relates to a method for identifying the internet application. in the method, an access control list module (10) and a deep packet detection module (20) are comprised; a dynamic deep packet detection strategy generating module (30) is arranged; the access control list module (10), the deep packet detection module (20) and the dynamic deep packet detection strategy generating module (30) are executed sequentially; the dynamic deep packet detection strategy generating module (30) can obtain the characteristic of the internet application dynamically by characteristic statistics for the internet application; the characteristic generates a deep packet detection strategy; furthermore, the deep packet detection module (20) is used for identifying. The invention has wide identifying range, high accuracy, high processing efficiency, flexible operation, good expansibility and strong realizability and can be used for realizing not only network device function but also network analysis system function.

The invention discloses a finite element human body modeling method oriented to human body communications, belonging to the technical field of human body communications. The method comprises the following steps: (1) performing geometrical abstraction to every part of a human body according to the shape properties of every part of the human body; (2) defining an inner geometrical structure of every part of the human body; (3) setting electromagnetic property parameters of stratum mediums in every part of the human body; (4) connecting every part of the human body to form a completed finite element model of human body. The finite element human body modeling method oriented to human body communications provided in the invention can form a finite element human body software model with the geometrical property and electromagnetic property which are similar to an authentic human body, and the finite element human body software model has significance to the study and application of the human body communication technology.

The invention discloses a cutting-grinding dual-purpose rock-processing system with double end faces. The system consists of a base, a lift, a worktable, a cutting-grinding dual-purpose motor system and a fixture system, and is characterized in that the working height of the worktable is regulated through the lift, so that a cutter and a grinding stone on the cutting-grinding dual-purpose motor system can perform cutting and grinding operation when the worktable is at a cutting height and a grinding height respectively. The rock-processing system has the main advantage of realizing two functions of cutting and grinding rock samples on one instrument, along with simple principle, strong realizability, single machine with two functions, economical efficiency and practicability.

The invention discloses a broadband satellite communication system and method based on satellite-borne IP switching. The communication system includes a broadband communication satellite with an satellite-borne IP switching function, a system network management control center, a gateway station and a satellite terminal; the broadband communication satellite with the satellite-borne IP switching function carries out IP switching on a satellite; the system network management control center is cooperated with the gateway station and the satellite terminal, so as to realize maintenance and distribution of routing switching information of the broadband satellite communication system based on the satellite-borne IP switching; the satellite terminal and the gateway station, according to switching label information distributed by the system network management control center, carries out packaging and unpacking processing of an access service data packet so as to realize transmitting and receiving of a service. The broadband satellite communication system of the invention realizes the IP switching on the satellite, does not need to implement a complicated routing algorithm, and is simple and flexible in system construction and extension; and while the link resource utilization efficiency of the satellite system is improved, the great implementability is realized. At the same time, the invention also discloses a broadband satellite communication method based on the satellite-borne IP switching.

The invention discloses a method for real-time monitoring of steel bar corrosion. The method comprises the following steps: (a) coating a layer of rust conversing paint on a surface of a steel pipe packaged fiber grating strain sensor and controlling a temperature in a coating environment at 0-40 DEG C and an air relative humidity at no more than 80%; (b) polishing a surface of a selected steel bar by a grinder to realize a flattening and smooth surface and keeping for usage; (c) pasting the steel pipe packaged fiber grating strain sensor obtained from the step (a) on a polished position of the steel bar to be used in the step (b); and (d) carrying out real-time monitoring on a wavelength drift amount by a fiber grating demodulator, meanwhile laying a steel pipe packaged fiber grating temperature sensor for monitoring change of temperature and completing temperature compensation. The invention can not only monitor early stage steel bar corrosion in a structure but also have good protection effect on the fiber grating sensor during a monitoring process and have strong realizability.

The invention relates to an automatic alarming device for unusual conditions of daily routine of the empty nest elderly and an alarming method. The automatic alarming device comprises at least a group of collecting units in signal connection sequentially, a judging unit, a control unit and an alarming unit. The judging unit comprises a threshold register, a current value register connected with the collecting unit, and a comparator respectively connected with the current value register and the threshold register. The comparison result of the comparator is output to the control unit which transfers the operational result judged as an alarm to the alarming device after receiving the comparison signals of the at least a group of the collecting units and the judging unit. The automatic alarming device provided by the invention is not needed to be controlled by a person to be monitored, and completely automatically senses and judges time, position, frequency and intensity and the like of events in a house to alarm automatically so as to automatically send SOS (Save Our Souls) alarming information to the outside world for the person to be monitored in an emergency that the person to be monitored is unable to alarm autonomously.

The invention relates to the electric vehicle charging and exchanging field, in particular to a mobile charging treasure dispatching method, a system, a dispatching server and a device, aiming at solving the problem that the number and distribution of charging piles and charging stations can not meet the demand. The mobile charging treasure scheduling method of the invention supports a sharing mode and a self-help mode. In the sharing mode, the user terminal initiates a charging request after parking at any position, and the server broadcasts a charging order for the service terminal to obtainor selects the service terminal by assigning an order, so that the vehicle to be charged is charged. In the self-service mode, the user terminal selects the mobile charging treasure and initiates thecharging request. After the server confirms, the user completes the charging by himself or requests the service executor to assist in completing the charging. The invention also provides a recovery management method, which constitutes a complete solution, solves the problem of difficulty in finding a charging pile and a charging station, and further relieves the travel anxiety of a user.

The invention provides a decoupling control method based on a virtual synchronous generator and a decoupling control device thereof. The decoupling control method based on the virtual synchronous generator comprises the steps that an LC filter equation of the virtual synchronous generator is established; the coordinate system of the LC filter equation is transformed into a dq coordinate system so that the expression of the LC filter equation in the dq coordinate system is obtained; the d-axis component of current, the q-axis component of current, the d-axis component of voltage and the q-axis component of voltage are respectively acquired according to the expression of the filter equation in the dq coordinate system; and auto-disturbance-rejection decoupling control is performed on the d-axis component of current, the q-axis component of current, the d-axis component of voltage and q-axis component of voltage. According to the technical scheme, real voltage and current dq decoupling control can be realized, and robustness and adaptability of a microgrid system are better.

The invention discloses a bucket-free reverse osmosis water purifier system capable of improving water production rate and a control method. The bucket-free reverse osmosis water purifier system is characterized in that running water is sequentially sent into a pressurizing pump and several stages of filter cylinder containers via a water inlet cross, and is communicated with the input end of a reverse osmosis membrane; a raw water TDS (total dissolved solids) probe is arranged at the front end of the reverse osmosis membrane and is used for detecting the TDS of raw water; the water outlet end of the reverse osmosis membrane is communicated with a pure water faucet through a check valve, a first high pressure switch and rear activated carbon; a pure water TDS probe is arranged between the water outlet end of the reverse osmosis membrane and the rear activated carbon, and is used for detecting the TDS of pure water; the wastewater drain end of the reverse osmosis membrane is separated into two branches, one branch is connected with the input end of a combined electromagnetic valve, and the other branch is connected with a running water faucet through a second electromagnetic valve, a second high pressure switch and the water inlet cross. The bucket-free reverse osmosis water purifier system has the beneficial effects that on the basis of original traditional water purifier, the realizability is strong, the change of a space is avoided, and any container is not additionally arranged; the manufacturing technology is simple, the production is easy, and the cost is low.

The invention relates to a method for adjusting wireless network resource and relative system, wherein said method comprises that: 1, obtaining the present channel number and needed channel number; 2, comparing present channel number and needed channel number; (3), adjusting the wireless network resource. And the system comprises network mange subsystem for obtaining present channel number and needed channel number; analyzer for based on said present channel number and needed channel number analyzing the network resource condition and providing adjusting method. The invention can predict network capacity need.

The invention discloses a geometrical variable flame stabilizing device and belongs to the technical field of afterburner flame stabilization of aircraft engines. The geometrical variable flame stabilizing device disclosed by the invention utilizes a V-shape as a basic bluff body structure and consists of a main body part and a transmission power part, wherein the main body part is vertically installed in an afterburner cartridge receiver, the afterburner cartridge receiver comprises a front streamline head part, a blade A with a rotating shaft A, a blade B with a rotating shaft B, a rotating shaft supporting plate and a mounting seat, and the two ends of the streamline head part are fixedly connected between the mounting seat and the rotating shaft supporting plate. The geometrical shape of the flame stabilizing device provided by the invention can be changed to effectively reduce the flow resistance of the flame stabilizing device if necessary, or the flow resistance is increased within a short time to improve the ignition success rate, or the geometrical shape of the flame stabilizing device is adjusted to consistently keep the flame stabilizing device at the optimal combination point of the flame stabilization and flow resistance loss so as to obtain the maximal thrust performance of the afterburner.

The invention relates to a chaotic signal generator which comprises a micro control unit, a magnetic coupling isolating circuit and a D / A converting circuit, wherein the micro control unit comprises a plurality of groups of signal output interfaces, and one group of the signal output interfaces is used for outputting a one-dimensional digital voltage signal; the signal output interfaces are sequentially connected with the magnetic coupling isolating circuit and the D / A converting circuit; a plurality of voltage signal output of the D / A converting circuit form a multi-dimensional analog voltage signal output; and the multi-dimensional analog voltage signal is a chaotic signal. The chaotic signal generator can output phase rail maps of chaotic or hyperchaotic attractors based on different chaotic systems with different types of single scroll, double scroll, multiple scroll, multiple wing, grid scroll, and the like and time domain waveforms of the signals corresponding to different state variables.

The invention provides a spatial light reception demodulation device comprising a four-quadrant photodetector, pre-transimpedance amplifier, a low pass filter, a low noise amplifier circuit, a sampling clock PLL circuit, a high-speed analog-to-digital conversion circuit, an FPGA processing circuit, an output interface circuit, and a photoelectric detector power supply and temperature compensation circuit. The spatial light reception demodulation device provided by the invention adopts the integrated design of precise tracking signals of spatial light positions and light communication signals, integrates spatial light position error tracking calculation with light reception demodulation, thereby simplifying an optical front end of spatial light communication; by means of the amplification of a low noise amplifier and FPGA amplitude detection and control, high sensitivity, wide dynamic range reception and amplification, and precise tracking position error information extraction of spatial light are realized; and meanwhile, by means of the software radio idea, high speed A / D collection and FPGA full digital processing are adopted to realize reception and collection, demodulation and recovery and position error control of the spatial light, and the temperature compensation of the detector.

The present invention provides a satellite-ground time synchronization system and method. The satellite-ground time synchronization system and method realize high-precision satellite-ground time synchronization based on a communication satellite measurement and control channel. The system comprises: a satellite time management and measurement and control response module taken as a core to realize time information interaction with a ground system through an uplink and a downlink; a high and stable frequency source configured to provide high and stable frequency; a central remote measurement module configured to send the whole satellite remote measurement data flow and collect the remote measurement quantity of the module; a central remote control module configured to receive a remote control instruction and send a data management instruction; and a central computer configured to perform satellite time broadcast between a RS422 bus and the module. Through fully employing synchronization track communication satellite measurement and control channel resource, the satellite-ground time synchronization system and method are able to avoid the introduce of other errors on a channel, realize the organic unification of a satellite-ground time synchronization function and a traditional measurement function, and are small in system modification, small in resource occupation and high in realizability so as to allow the satellite system to have satellite time with higher precision and stability and expand the function category of Chinese traditional communication satellite measurement and control subsystem.

The invention discloses a radar range profile statistics and recognition method based on a PPCA model in the strong noise background, which relates to the technical field of radar automatic target recognition and mainly solves the problem that the current statistics and recognition methods based on the PPCA model are not robust to noises. The training phase comprises the following steps: framing, translating, aligning and strength-normalizing radar HPPR continuously, learning the parameters of each azimuth frame of the PPCA model by adopting the processed HRRP and storing a template. The test phase comprises the following steps: first strength-normalizing, translating and aligning the samples to be tested and then estimating the range of the signal-to-noise ratios (SNR) of the samples; computing the distance value of each frame of each target and deciding the category attribute if the SNR is more than 30dB, and rewriting the distance value, solving the noise energy under SNR condition by minimizing the distance value, finally computing the distance value of each frame of each target and deciding the category attribute if the SNR is less than 30dB. The method has the advantages of robustness to noises and less computation and is applied to identifying radar targets.

The invention relates to a reactor designing method. The reactor designing method includes firstly detecting delayed neutron yield, writing the delayed neutron yield in a data base, then calculating effective share of delayed neutrons and neutron generation time, and then calculating dynamic characteristics of a reactor until design standards are met. The reactor designing method is not limited by reactor types and reactor core materials and can be widely applied to various types of reactors, Monte Carlo source programs are not required to be modified, and the reactor designing method has good realizability.

The invention discloses a depth video coding method on the basis of a foveal JND (just noticeable distortion) model. The depth video coding method comprises the following steps of: firstly, calculating the global JND of each pixel in each frame in a middle virtual viewpoint video obtained by carrying out middle virtual viewpoint rendering on color videos at left and right viewpoints and depth videos at left and right viewpoints; then, according to the global JND, obtaining a middle virtual viewpoint video subjected to geometrical offset; according to the geometrical offset, obtaining the maximum tolerable distortion video of the depth video at the left viewpoint; and finally, obtaining increasable coded quantization parameters of each macro block in each frame of the depth video at the left viewpoint according to the maximum tolerable distortion video. According to the method disclosed by the utility model, on the premise of maintaining the visual perception quality of virtual viewpoints, the encoding rate of the depth videos is effectively saved, the compressed coding efficiency of a depth video sequence is also greatly improved, and code streams can be saved by 11.00% to 23.34%.

The invention discloses a novel teaching assistant robot. The novel teaching assistant robot comprises a composite hinge mechanism, an arm linkage mechanism, a demonstration table lifting mechanism, a desktop telescoping mechanism, a track traveling mechanism and a multimedia device. The novel teaching assistant robot can go up and down stairs, turn and walk in a classroom through the track traveling mechanism when teaching, so that a desktop platform, a demonstration table and the multimedia device move. The demands of teachers to a teacher's desk are satisfied through the free extension of the desktop and the free movement of the multimedia device; the all-round demonstration of teaching aids can be achieved through the lifting and the rotation of the demonstration table. Timely limb movements (comprising arms, a head and a face) and the multimedia device can create and activate excellent classroom atmosphere; the arm linkage mechanism can realize the actions such as handclap and cheer; the face can realize various different expressions. The interactions between the teachers and students are enhanced through basic service functions such as voice speaking and collection of student information through short messages.

The invention discloses a preparation method of a metal organic framework derived iron sulfide@carbon nano composite material, and belongs to the technical field of lithium ion battery negative electrode materials. Fumaric acid and nitric acid molten iron are subjected to a hydrothermal reaction to obtain spindle-shaped MIL-88 nanoparticles, and then sulfur doping and calcining are performed to obtain a carbon-coated sulfur-doped core-shell structure iron sulfide@carbon nano composite material. The MIL-88(MOFs)-derived metal sulfide prepared by the preparation method disclosed by the inventionkeeps the frame structure of a precursor, and in the calcining process, an organic ligand in the metal organic framework material MIL-88 is cracked to form the core-shell structure of the carbon-coated iron sulfide core; the structure can inhibit the volume expansion of the electrode material in the charging and discharging process to adjust the integrity of the structure, and the formed activated carbon can improve the conductivity of the electrode material and improve the performance of the battery; and the preparation process has the advantages of low cost, simplicity and convenience in operation, environmental friendliness and the like, and has good realizability.

The invention discloses a small-angle tilting mechanism of an engine for a small tilt rotor aircraft. The small-angle tilting mechanism of the engine comprises a tilting main shaft, a steering engine fixing frame, a servo steering engine, a steering engine plate, a ball head tie rod assembly, left and right engine bases, engine base fastening bolts, an engine fixing frame, a rack fastening bolt and an engine base rotating bearing, wherein the tilting main shaft is connected with a machine body; the servo steering machine is connected to the tilting main shaft through the steering engine fixing frame, and is connected with the steering engine fixing frame through bolts; a take-up device is arranged on the steering engine fixing frame and used for loading, unloading and moving the steering engine fixing frame on the tilting main shaft; the steering machine plate is inserted into an output shaft of the servo steering machine; one end of the ball head tie rod assembly is connected with the steering machine plate; the other end of the ball head tie rod assembly is connected with the left engine base; the left engine base and the right engine base are connected to the tilting main shaft through engine base rotating bearings; the axial positioning and circumferential positioning of the left engine base and the right engine base are achieved through the engine base rotating bearings; and the engine fixing frame is fixed on the left engine base and the right engine base through four rack fixing bolts.

The invention discloses a sensing chip, a fingerprint recognition module, a manufacturing method of the fingerprint recognition module and a mobile terminal. The sensing chip is suitable for being attached to a flexible printed circuit board and comprises an attaching part and a spraying part, wherein the lower surface of the attaching part is suitable for being attached to the flexible printed circuit board, the spraying part is connected with the attaching part and located on the attaching part, and the periphery of the spraying part exceeds the periphery of the attaching part. According to the sensing chip of the fingerprint recognition module, the sensing chip is set to comprise the attaching part and the spraying part, the attaching part is attached to the flexible printed circuit board so that the sensing chip can be electrically connected with the flexible printed circuit board, the spraying part is sprayed so that the attractiveness of the appearance of the fingerprint recognition module can be improved. Meanwhile, the periphery of the spraying part exceeds the periphery of the attaching part so that the sensing chip can be protected against damage in the machining process of the sensing chip, and the working reliability of the sensing chip is improved.

The invention discloses a radar range profile statistics and recognition method based on a FA model in the strong noise background, which relates to the technical field of radar automatic target recognition and mainly solves the problem that the current statistics and recognition methods based on the FA model are not robust to noises. The training phase comprises the following steps: framing, translating, aligning and strength-normalizing radar HPPR continuously, learning the parameters of each azimuth frame of the FA model by adopting the processed HRRP and storing a template. The test phase comprises the following steps: first strength-normalizing, translating and aligning the samples to be tested and then estimating the range of the signal-to-noise ratios (SNR) of the samples; computing the distance value of each frame of each target and deciding the category attribute if the SNR is more than 30dB, and rewriting the distance value, solving the noise energy under SNR condition by minimizing the distance value, finally computing the distance value of each frame of each target and deciding the category attribute if the SNR is less than 30dB. The method has the advantages of robustness to noises and less computation and is applied to identifying radar targets.