106results about How to "Easy to expand application" patented technology

The invention discloses a semantic information transmission and protection method based on H264. The semantic information transmission and protection method comprises the following steps of: firstly, carrying out semantic information indexing on a digital video of an H264 standard to obtain n-dimensional semantic information and pre-treating the n-dimensional semantic information into n binary images; and taking the binary images as robust watermarks to be embedded into a middle-frequency coefficient of a DCT (Discrete Cosine Transformation) region of an I frame of the digital video of the H264 standard. A semantic watermark in the I frame has the better robustness so that the stability of semantic information transmission is guaranteed; and the semantic information transmission and protection method is good for various expanded applications of a user terminal and guarantees the safety and the integrity of the robust watermarks, namely the semantic information. Meanwhile, the middle-frequency coefficient is used as characteristic information to be converted into a fragile watermark; and finally, the fragile watermark is embedded into a movement vector of a P frame. The movement vector of the P frame has the good vulnerability so that the robust semantic watermark, namely the safety and the integrity of the semantic information, can be verified by utilizing the fragile watermark, and the safety of the semantic information is sufficiently guaranteed.

The invention relates to an active equalizing and protecting system of a stackable series-connected lithium battery. A coprocessor is connected with a processor by a serial peripheral interface (SPI) bus; each equalizing unit comprises a single battery and an equalizing circuit, wherein every adjacent two equalizing units are connected in series as follows: a first equalizing circuit and a first single battery are connected in parallel; the first equalizing circuit comprises a first P channel metal-oxide semiconductor field effect transistor (MOSFET) and a first N channel MOSFET; the drain electrodes of the two MOSFETs are connected, the gate electrodes of the two MOSFETs are connected, and the two MOSFETs are connected with the coprocessor through a first signal input end; the source electrodes of the first MOSFET and second MOSFET are respectively connected with the positive pole and negative pole of the first single battery in parallel; the positive pole of the second single battery is connected with the negative pole of the first single battery; a second equalizing circuit connected with the two ends of the second single battery in parallel has the same structure as the first equalizing circuit; and the drain electrodes of the first equalizing unit and the second equalizing unit are connected by a super capacitor.

Monitoring device is composed of resistance divider circuit, multiway switch circuit, difference operational amplification circuit, A / D conversion circuit, single chip and CAN communication circuit connected in sequence and communication interface to main controller of fuel cell. The device is capable of monitoring voltages of 59 single cells in fuel cell pile. Combining multiple disclosed monitoring devices with communication between main controller and each equipment realized through CAN network can monitor more cells. Features are: small size, low cost, easy of expansion, high measuring accuracy (maximum absolute error less than 0.08V) and quick measuring speed (time for measuring 59 single cell is less than 0.05 second).

The invention discloses a bi-directional dual-input SEPIC direct-current converter and a power distribution method of the bi-directional dual-input SEPIC direct-current converter. The bi-directional dual-input SEPIC direct-current converter comprises a first SEPIC pulse current source unit, a second SEPIC pulse current source unit and an output filter circuit. The first SEPIC pulse current source unit comprises a first input direct current voltage source A, a first power switch tube M1, a second power switch tube M3, a first inductor L1, a second inductor L3 and a first capacitor C1. The second SEPIC pulse current source unit comprises a second input direct current voltage source B, a third power switch tube M2, a fourth power switch tube M4, a third inductor L2, a fourth inductor L4 and a second capacitor C2. The first SEPIC pulse current source unit and the second SEPIC pulse current source unit are connected in parallel, and the output filter circuit comprises an output filter capacitor C. The power distribution method includes power distribution and load feedback power control which are carried out on the two input direct current voltage sources. The bi-directional dual-input SEPIC direct-current converter and the power distribution method of the bi-directional dual-input SEPIC direct-current current have the advantages of being complex in circuit structure, capable of achieving boost and voltage reduction, wide in adjusting range of output voltage, capable of achieving energy feedback, small in loss, high in circuit efficiency, small in ripple in output voltage waveform and capable of being used on a large current occasion due to connection of two current sources in parallel, and an isolation transformer is not needed.

The present invention provides a word segmentation system construction and application method, and belongs to the field of computer technology application for natural language processing. The present invention provides a word segmentation method combining a dictionary and a statistic model based on inherent properties of sentences of the natural language. According to the method, in processing, dictionary information is used as a resource that is fit and adjusted externally, and can produce effect and generate features in the statistic model, the impact of original training language materials on the dictionary in model learning is fully taken into account, and the algorithm has efficient feature generation and combination modes, thereby fully lowering calculation complexity, and effectively generating high-precision word segmentation model finally; and when the method is used, related words can be added in the dictionary conveniently, thereby effectively improving applicability of the algorithm in different scenes. According to the adaptive word segmentation method, the computer can automatically perform word segmentation processing on sentences of the natural language, it is convenient to extend applications in different fields, and word segmentation results can be used by the computer for following analysis.

The invention relates to a method and a system for detecting the sunlight intensity of an automatic air conditioner. The method comprises the following processes of acquiring the current longitude and latitude information and the real-time travelling information of an automobile by a Telematics vehicular terminal, and transmitting the current longitude and latitude information and the real-time travelling information of the automobile to an automatic air-conditioner controller; calculating the included angle gamma of the current travelling direction of the automobile and the sun by the automatic air-conditioner controller according to the current longitude and latitude information and the real-time travelling information of the automobile; judging whether the sun is within the detecting range of a sunlight sensor or not by the automatic air-conditioner controller; if so, then using a sunlight-intensity detecting value b detected by the sunlight sensor as the sunlight intensity a; otherwise, correcting the sunlight-intensity detecting value b detected by the sunlight sensor to obtain the sunlight intensity. When the sun is not within the detecting range of the sunlight sensor, the sunlight intensity a is obtained by correcting the sunlight-intensity detecting value b detected by the sunlight sensor, so that the accurate detection of the sunlight intensity a outside the automobile by the automatic air conditioner is guaranteed, and the environmental comfort level in the automobile is improved.

The invention discloses a high precision wide frequency domain frequency measuring system The high precision wide frequency domain frequency measuring system comprises a waveform shaping circuit, the input end of which is connected with a signal source; a gate control module, which is used to execute a control instruction to control connection / disconnection of a rectangular wave signal; a frequency divider, which is used to output a pulse signal after carrying out the frequency division processing of the rectangular wave signal; a microcontroller, which is used to transmit the control instruction to a gate control module, is used to count the pulse signal output by the frequency divider, is used to calculate signal frequency data, and is used to calibrate the signal frequency data according to a frequency measurement correction parameter; an upper computer, which is connected with the microcontroller, is used to transmit the frequency measurement correction parameter to the microcontroller, and is used to receive the calibrated signal frequency data uploaded by the microcontroller. The high precision wide frequency domain frequency measuring system and a frequency measuring method are advantageous in that the high precision wide frequency domain frequency measurement is realized, the structure is simple, the operation is convenient, the cost is low, the expansion is easy, and the use is stable and reliable.

A device for monitoring single plate voltage of vehicle fuel cell is featured as connecting input end of optical couple gating communication circuit to each single plate of fuel cell in sequence, connecting output end to isolation circuit input end, inputting signal to monolithic computer through absolute value circuit after isolation treatment, controlling four I / O pin signals by said computer and using hardware interlocking circuit to ensure uniqueness of gating channel, carrying out communication with external main controller by monolithic computer through CAN communication circuit.

The invention discloses a three-input-isolation DC / DC converter which includes a former stage inversion circuit, a transformer and a backward stage rectifying circuit. The former-stage inversion circuit and the backward stage rectifying circuit are coupled together through the transformer so that input and output electrical isolation is realized. The three-input-isolation DC / DC converter is capable of realizing bidirectional flowing of energy and saving electric energy so that modularization is easy to realize and application is easy to expand. The three-input-isolation DC / DC converter connects different power generation units in a DC distributed power generation system through an integrated interface current transformer so that control of the DC distributed power generation system is converted to control of the single interface current transformer and thus control complexity of the DC distributed power generation system is reduced significantly and power density of the system is improved.

The invention provides a superconducting claw-pole motor. A stator part comprises a hollow support shaft, n superconducting exciting winding supports and a Dewar structure, wherein the n superconducting exciting winding supports and the Dewar structure are fixed on the hollow support shaft, a superconducting exciting winding is arranged in each exciting winding support, and a refrigerant pipe and a superconducting outgoing line are arranged in the hollow support shaft; a rotor part comprises a rotor shaft and n rotor magnet yoke sets; and each rotor magnet yoke set comprises an A magnet yoke and a B magnet yoke, claw poles on the two magnet yokes are distributed in a staggered mode and oppositely buckled on the two sides of a corresponding superconducting exciting winding, and the rotor shaft and the n rotor magnet yoke sets can rotate synchronously around the central axis of the rotor shaft. Motors in different power levels can be implemented through expanding the diameters along the radial direction or increasing the number of superposed claw pole assemblies along the axial direction. According to the invention, under the premise of meeting the operation of superconducting motors, the superconducting claw-pole motor disclosed by the invention has the characteristics of simple structure, low cost, easy machining, direct power-supply connection of exciting windings, no carbon brush or induced circuit required, small weight and size, and the like, and improves the reliability and efficiency of systems.

The invention discloses a set top box with a universal remote control function, which consists of a set top box terminal and a handheld control terminal. The set top box terminal comprises a controller, an audio and video processing module and an input and output terminal. The handheld control terminal comprises a controller and buttons. The set top box is characterized in that the set top box terminal is provided with an RF (radio frequency) wireless transceiving module and an infrared code system database. The handheld control terminal is provided with an infrared emitting module, an RF wireless transceiving module and a storage. The RF wireless transceiving module of the handheld control terminal is matched with the RF wireless transceiving module of the set top box terminal, the set top box selects infrared control codes of a device to be controlled from the infrared code system database to transmit to the handheld control terminal through the RF wireless transceiving module and store in the storage, so that infrared signals emitted by the infrared emitting module of the handheld control terminal are matched with an infrared receiving module of the device to be controlled. A user can visually select brands and specifications of devices to be controlled through the set top box with the universal remote control function and can use the set top box conveniently.

The invention discloses a dynamic variable multi-data-format satellite-assisted data processing system. The system comprises a state parameter processing module, a scanning information processing module, a satellite timekeeping and calibrating module and an auxiliary data synthesizing module. The state parameter processing module receives satellite parameters, camera parameters and broadcast benchmark parameters, conducts classification after verification and sends the parameters to the respective modules to be processed. The satellite timekeeping and calibrating module processes input pulsesper second, internally generates a 1M clock microsecond counter, and receives and calibrates broadcast benchmark time. The scanning information processing module sends angle collecting pulses to obtain scanning angle information, receives a camera series, dynamically updating the scanning angle information according to the series value, and ensures that star map data strictly corresponds to the scanning angle during operation. The auxiliary data synthesizing module conducts scheduling according to the satellite data format, outputs frame header information when frame synchronizing starts, outputs line header information, star map data and end-of-line information when line synchronizing starts, and outputs end-of-frame information when star map data ends.

The invention discloses a method and a system for detecting a flow of a peer-to-peer network. The method comprises the following steps of: acquiring all the packets by a primary filter plant from a network forwarding device; detecting a plaintext feature string of a known P2P application after the primary filter is performed, sending a packet which contains a plaintext feature string to a plaintext processing model and counting a flow of the P2P forwarded in a plaintext manner; sending the packets which contain no plaintext feature string to a to-be-detected processing module and sending an active detecting packet formed by secret key information defined by different P2P applications to a detected target; detecting the flow of the P2P forwarded in a cipher text manner or other unknown flows according to a response packet fed back by the detected target. By implementing the technical scheme of the invention, processing work for flow detection is reduced effectively, the system efficiency is improved, and the failure and update of a single module do not influence the whole system. The technique of the invention avoids influencing the topology and performance of the traditional network and facilitates deployment and implementation.

The invention provides an auto vehicle identification device based on radio frequency identification technology. The auto vehicle identification device comprises a radio frequency module and a decoding module, wherein the radio frequency module comprises a radio frequency emission circuit and a radio frequency receiving circuit; the radio frequency emission circuit is responded to a power amplifier startup signal sent from a vehicle number host to generate a radio frequency signal, and the frequency signal is output via an antenna; the radio frequency receiving circuit receives a label modulating and returning signal obtained by coupling label information into a radio frequency signal, and the label modulating and returning signal is output after the label modulating and returning signal is divided into two paths of label baseband signals; and the decoding module receives the two paths of label baseband signals and uploads the paths of label baseband signals after the label baseband signals are subjected to analysis processing. On the basis of modular design thought, the auto vehicle identification device can be conveniently expensively applied, and the auto vehicle identification device can be assorted with other pieces of vehicle number host equipment to be applied to various occasions.

The invention discloses a device for positioning and sample feeding of a low-field magnetism resonance system, and also discloses a method for the positioning and sample feeding of the low-field magnetism resonance system. The device for the positioning and sample feeding comprises an air compressor and a vacuum pump, wherein the air compressor and the vacuum pump are connected with a noncircular sample feeding guide pipe through a pipeline; a positioner and a guide pipe lower cover are arranged on the noncircular sample feeding guide pipe, and are arranged in a net cover and a shielding box; a computer is used for controlling a noncircular positioning slide block loaded with a nuclear magnetic sample pipe to do reciprocating conveying in a fixed-direction and non-rotating way between a permanent magnet and the positioner through two electromagnetic valves, so as to guarantee that the nuclear magnetic product can be stably and quickly positioned into a detection area of the net cover and the center of the shielding box; by using the noncircular sample feeding guide pipe which is made of a PEEK (poly ether ether ketone) material and the nuclear magnetic sample pipe which is coated with a high temperature-resistant and heat-insulation material, the constant temperature of a nuclear magnetic sample is guaranteed. The device has the advantages that the structure is simple, the operation is convenient, the positioning, sample feeding and effective heat insulation are realized, and the device is suitable for the detection NMR (nuclear magnetic resonance) and MRI (magnetic resonance imaging) study based on an atom magnetic meter method.

Provided is a dual-direction dual-input ZETA / SEPIC direct-current converter and a power distribution method of the dual-direction dual-input ZETA / SEPIC direct-current converter. The direct-current converter comprises a ZETA impulse voltage source, an SEPIC impulse current source and an output filtering circuit. The SEPIC impulse current source comprises a first input direct voltage source A, a first power switching tube M1, a third power switching tube M3, a first inductor L1, a second inductor L2 and a first capacitor C1. The ZATA impulse voltage source comprises a second input direct voltage source B, a second power switching tube M2, a fourth power switching tube M4, a third inductor L3 and a second capacitor C2. The ZETA impulse voltage source is embedded into the SEPIC impulse current source. The output filtering circuit comprises an output filtering capacitor C. The power distribution method includes the steps of conducting power distribution and load feedback power control on the two input sources. The dual-direction dual-input ZETA / SEPIC direct-current converter and the power distribution method of the dual-direction dual-input ZETA / SEPIC direct-current converter can achieve voltage boosting, voltage reduction and energy feedback, are high in circuit efficiency, allow the converter not to be isolated, and are suitable for small and medium-size power new energy joint power supply systems.

The invention discloses a bidirectional double-input BUCK / BUCKBOOST dc converter and a power distribution method thereof. The dc converter is composed of a BUCK pulse voltage source, a BUCKBOOST pulse current source and an output filter circuit, wherein the BUCK pulse voltage source comprises a power supply and a half-bridge switch block, the BUCKBOOST pulse current source comprises a power supply, a power switch tube and an inductor, and after the BUCK pulse voltage source is embedded into the BUCKBOOST pulse current source, a load is supplied via a filter C. The power distribution method comprises power distribution and load feedback power control is carried out on two input sources, wherein when the required power of the load is greater than the power provided by the power source A, the power source B is discharged; and when the required power of the load is lower than the power provided by the power source A, the power source B is charged. The dc converter and the power distribution method of the invention are characterized by capability of stepping voltage up / down, inversion of output polarity, large adjusting range of output voltage, energy feedback, low loss and high circuit efficiency, etc.

The invention relates to a mining and construction method of a field specific word, and belongs to the application field of the computer technology of natural language processing. The mining and construction method has the advantages that a specific word mining method which combines with a field topic dictionary and a statistic model is provided on the basis of the field correlation of corpus, an algorithm is provided with an efficient characteristic generation and combination way, computation complexity can be fully lowered, and finally, a specific word mining mode with high accuracy is finally and effectively generated; and when the method is applied, relevant words can be conveniently added into a new dictionary in a targeted way so as to effectively improve the applicability of the algorithm under different scenes. The mining and construction method effectively realizes a purpose that a computer automatically extracts the specific word associated with the field in the wide corpus of the natural language, the field specific word formed by extracted vocabularies can be supplemented into a field specific dictionary, and the field specific word is further provided for the computer to carry out various types of subsequent analysis.

The invention discloses a bi-direction dual-input ZETA / BUCKBOOST direct current converter and a method for distributing power of the direct current converter. The bi-direction dual-input ZETA / BUCKBOOST direct current converter comprises a ZETA impulse voltage source unit, a BUCKBOOST impulse current source unit and an output filter circuit. The ZETA impulse voltage source unit comprises a first input direct current voltage source A, a first power switch tube M1, a second power switch tube M3, a first inductor L1 and a first capacitor C1. The BUCKBOOST impulse current source unit comprises a second input direct current voltage source B, a third power switch tube M2, a fourth power switch tube M4 and a second inductor L2. The output filter circuit comprises an output filter capacitor c. The method for distributing the power of the direct current converter comprises the step of distributing power and controlling load feedback power of the ZETA impulse voltage source unit and the BUCKBOOST impulse current source unit. The bi-direction dual-input ZETA / BUCKBOOST direct current converter and the method for distributing the power of the direct current converter have the advantages of being capable of achieving the purposes of increasing and reducing voltage, feeding back energy and inversing output polarity, large in output voltage adjusting range, small in loss, high in circuit efficiency, small in ripple waves in output voltage waveform and the like, and an isolation transformer is not needed.

The invention provides a random access memory access bus ECC (error checking and correcting) verification device, which comprises a main equipment module, a random access memory and a bus connector positioned between the main equipment module and the random access memory, wherein a bus ECC bridging module is arranged between the random access memory and the bus connector; the bus ECC bridging module comprises at least two gate control registers, at least two bus response gates, at least two bus transmission gates and an ECC bridge, wherein the first bus input end of each bus transmission gate and the coding input end of the ECC bridge are both connected to the bus connector; the first response input end of each bus response gate and the decoding input end of the ECC bridge are both connected to a random access memory end; a first switch is arranged between the coding input end of the ECC bridge and the bus connector; a second switch is arranged between the random access memory and the decoding input end of the ECC bridge. According to the random access memory access bus ECC verification device disclosed by the invention, whether each random access memory needs ECC verification or whether ECC verification is required in the random access memory is flexibly selected according to different application occasions, thereby being convenient for system expanding application, and improving the integral efficiency.

The invention relates to a dual-voltage driving circuit provided with natural gas injection solenoid valves. The dual-voltage driving circuit comprises two paths of high-side and low-side driving circuits, a current sampling circuit and the two solenoid valves for driving natural gas injection. The high-voltage high-side driving circuit is connected with a high-voltage power supply of an externalpower module and also is connected with the first solenoid valve and the second solenoid valve. The low-voltage high-side driving circuit is a lower-voltage power supply of the external power module and is also connected with the first solenoid valve and the second solenoid valve. The first selected cylinder low-side driving circuit is connected with the first solenoid valve. The second selected cylinder low-side driving circuit is connected with the second solenoid valve. The first solenoid valve and the second solenoid valve are connected with the current sampling circuit. The two paths of high-side and low-side driving circuits and the current sampling circuit are all connected with a control unit. The dual-voltage driving circuit achieves high-precision control over the natural gas injection solenoid valves at high frequency and is simple in structure and low in cost and facilitates extensive application.

The invention discloses a catalyst for synthesizing dimethyl carbonate and a preparation method thereof. The catalyst is prepared by the following steps of: 1) dispersing alkaline-earth metal oxides with flower-shaped micro-nano-structures or glycol precursor thereof in a mixed solvent of water and ethanol, adding ammonia water into the mixed solvent, and then adding silicate ester into the mixedsolvent to obtain a mixed system; 2) reacting the mixed system at the temperature of between 10 and 80 DEG C for 0.5 to 24 hours, and centrifugally collecting a solid product after the reaction is finished; and 3) drying the solid product at the temperature of between 50 and 200 DEG C, and roasting at the temperature of between 350 and 800 DEG C for 1 to 15 hours to obtain the catalyst. The catalyst has high catalytic efficiency. During catalyzing methanol and ethylene carbonate or propylene carbonate to perform ester exchange reaction, the conversion rate of the ethylene carbonate or propylene carbonate is over 90 percent and the selectivity of the product dimethyl carbonate is over 95 percent. The catalyst is easy to extend and apply, and maintains the catalytic activity after being repeatedly used for more than 10 times.

The invention discloses a doorbell intercom system, which comprises at least one door phone arranged outside a door and an indoor phone arranged indoors, wherein the door phone comprises a baseband chip, a wireless transmitting / receiving module, a doorbell button, a horn and a microphone; the baseband chip controls the wireless transmitting / receiving module to be communicated with the indoor phone under the trigger of the doorbell button, and the wireless transmitting / receiving module and the indoor phone perform transmission by using a cordless telephone signal, so that an audio signal inputted by the microphone is sent to the indoor phone and the received audio signal is sent to the horn to be played after being processed; and the indoor phone is a wireless cordless / base telephone and comprises a wireless base telephone and a plurality of wireless cordless telephones. In the intercom system, the door phone is communicated with the indoor phone by utilizing the conventional telephone network and the cordless telephone signal, so the wiring cost is reduced, and the doorbell intercom system is convenient to install and answer.

The invention relates to a critical size control system and a plasma processing device. The critical size control system comprises a first temperature control device and / or a second temperature control device and a control unit; the first temperature control device which is in contact with a gas spraying head is used for detecting, adjusting and controlling the temperature of the gas spraying head; the second temperature control device which is in contact with a grounding ring is used for detecting, adjusting and controlling the temperature of the grounding ring; the control unit which is corresponding to the first temperature device and / or the second temperature control device generates at least one type of the following control signals which comprise a first control signal which is used for controlling the first temperature control device to adjust the temperature of the gas spraying head and a second control signal which is used for controlling the second temperature device to adjust the temperature of the grounding ring. The critical size control system has the advantages of achieving adjusting and controlling of the critical size of different areas of wafers and being low in achieving costs and easy to expand and apply due to the temperature control of the gas spraying head and the grounding ring.

The invention discloses an active learning method for domain hierarchical dictionary mining construction. The method comprises the following steps: constructing a domain professional word entity extraction model, and extracting professional words in a domain article to generate a bottom-layer original professional word bank; combining the information entropy, the support degree and the part-of-speech template to filter a bottom-layer original professional lexicon to construct a domain dictionary; generating a domain synonym dictionary based on the domain dictionary in combination with multiplesynonym generation methods; constructing initial seed words of domain hierarchical words through network open resources, training a hierarchical word prediction model, and summarizing related optimization filtering rules; and based on the domain dictionary and the synonym dictionary, combining the hierarchical word prediction model and the optimization rule to complete superior and subordinate expansion and same-level expansion of the domain hierarchical word list. According to the method, a computer can automatically extract domain-related proprietary words from wide corpora of a natural language and construct a hierarchical dictionary, and expansion and application in different domains are facilitated.

The invention discloses a light wireless transmission system for high-definition videos. The light wireless transmission system comprises a video server side and a video browser side, wireless data transmission between the video server side and the video browser end is performed through a Mesh network, the video server side comprises a kernel processing chip and a wireless transmitter module connected with the kernel processing chip, an image collecting interface is arranged on the kernel processing chip, and the video browser side adopts a computer and client-side video browsing software based on a Windows platform. According to the light wireless transmission system, long-distance transmission of 720P high-definition images under the condition of limited wireless bandwidth is achieved, a transmitting side device has the advantages of being light in mass, low in power consumption and the like, expensive application to mobile equipment with limited loads is facilitated, problems of major natural disaster scenes, large-scale mass meetings, important security scenes and the like can be assisted to solve, rear commanders need to know problems of real-time information timely to improve the decision response accuracy and timeliness and to improve the working efficiency.

The invention discloses a human identification-based household anti-theft method and a human identification-based household anti-theft device. The method and the device are characterized in that: a zooming photographic module capable of acquiring visible light images and infrared images is arranged at a concealed position with a relatively wider visual field, and transmits acquired image data to an image analysis module for identification, analysis and processing to obtain required human identification alarming data which can be stored into own memory bank and also can be transmitted to an alarming module for alarming or externally transmitted by a data exchange extended interface. The method and the device have the advantages that: the device has a small volume so as to be convenient to conceal; the method ensures high reliability and real-time; and the method and the device are applied to the prevention of burglary in households, and also can be applied to the anti-theft environments of warehouses, garages and the like.

The invention relates to a resorcinol derivative and a preparation method thereof. According to the invention, the synthesis method can be very simply and conveniently expanded and applied to synthesis and preparation of other derivatives and analogues of cannabidiol, so that the selectivity is greatly improved, the generation of regioisomers and disubstituted byproducts is avoided to the greatestextent, and the yield is remarkably improved; the method has the advantages of low material cost, few pollutants, simplicity and convenience in operation, easiness in expanded application of a synthetic route and the like; and the method specifically designed by the invention can reduce byproducts, so that the method can be carried out by using a one-pot method so as to greatly reduce the productand energy consumption during purification by using a step-by-step method and greatly reduce pollutants.

The invention discloses a portable wireless high-definition image transmission system. The portable wireless high-definition image transmission system comprises an image acquisition interface, an image compressing module, a COFDM (coded orthogonal frequency division multiplexing) wireless transmitting end module, a COFDM wireless receiving end module, an image encoding module and a video output interface. The portable wireless high-definition image transmission system and a method thereof have the advantages that: the portable wireless high-definition image transmission system can realize remote transmission of 720P high-definition image under the condition of a limited wireless bandwidth; a transmitting end device has the characteristics of light weight, low power consumption and the like; and the portable wireless high-definition image transmission system and the method thereof can be conveniently applied to mobile equipment with a limited load in an expandable way.

The invention relates to a motion controller and a control method in a technical field of numerical control, particularly to a multi-shaft motion controller based on a dual-core controller and a control method of a closed-loop PWM pulse. The motion controller comprises a main processor core, an upper computer, and a servo driver; the upper computer and the main processor core are connected by a serial bus; and motion instruction data are transmitted to the main processor core. In addition, the invention also includes a co-processor core, an integrated multi-channel PWM controller, and a shared memory; and the PWM controller and the co-processor core complete position tracking jointly. The shared memory, the main processor core, the PWM controller, and the co-processor core are connected successively to form a closed loop. The controller and the control method have the following beneficial effects: firstly, with a single-path multi-core DSP, a problem of consistency of shared data between processor cores can be solved and the processing efficiency is improved; secondly, the closed-loop PWM pulse control method is applied to motion control; and thirdly, the provided technique is easy to extend and apply.