107results about How to "Reduce the difficulty of implementation" patented technology

The invention discloses a method for recovering vanadium, titanium and iron from vanadium titanium magnetite, comprising the following steps: using mineral powder, coal dust and binder together for agglomeration, reducting the mineral powder in a rotary hearth furnace to obtain a metallized product, then placing the product in an electric furnace by hot charging for melting and separating and obtaining titanium slag containing more than 50% of vanadium-bearing molten iron and TiO2. Vanadium slag is obtained by blowing vanadium in the vanadium-bearing molten iron, semisteel is used to make steel in a converter and the titanium slag can be used as raw material for extracting titanium directly. The method of the invention has high reduction temperature for vanadium titanium magnetite, short time, environmentally friendly, simple process and high yield of vanadium, titanium and iron so as to reach the aim of the comprehensive recovery and application of vanadium, titanium and iron and have good economic benefit and social benefit.

The invention provides an encoder and decoder for quantum cryptographic communication. The encoding and decoding functions of a BB84 protocol can be achieved through the encoder and the decoder. According to the encoder and decoder for quantum cryptographic communication, an optical switch device is used at a transmitting terminal, so that optical pulse passes through a plurality of interferometers randomly, the phase differences between long arms and short arms of the interferometers are k*2phi+phi/2 sequentially, and therefore the encoding function required by the BB84 protocol is achieved; a measurement base is randomly selected in a passive mode through an optical beam splitter at a receiving terminal and the decoding function is achieved through the interferometers with the phase differences of the long arms and the short arms to be k*2phi+phi/2. Due to the adoption of the interferometers, high-speed phase modulators do not need to be used in the interferometers, the limit to speed by round-trip time is broken, a phase modulation drive circuit can be obtained through devices according to a low-speed design scheme, the difficulty in achieving a high-speed quantum cryptographic communication system is greatly reduced, and the encoder and the decoder are quite suitable for achieving high-speed quantum cryptographic communication. If the structure of the Michelson interferometer (F-M) with a Faraday reflector adopted is used, the self-adaptation compensation capacity for dealing with polarization disturbance in an optical path is further achieved.

The invention discloses a double-tuned microwave spectrum analyzer. After a microwave input signal passes through a switch filtering matrix, the first frequency conversion of the microwave input signal is realized by utilizing a big step tunable microwave local oscillator, and the second frequency conversion of the microwave input signal is executed by utilizing a tunable radio frequency local oscillator with continuous frequency, so the frequency spectrum measurement of the microwave signal is realized. Requirements of various users on measurement can be met by changing the frequency of the step tunable microwave local oscillator and combination of filters of the switch filtering matrix according to requirements of users on practical measurement; and the double-tuned microwave spectrum analyzer is simple in design and easy to realize, and greatly lowers the measurement cost of users.

The invention discloses a broadband terahertz harmonic mixer which comprises a cavity structure, a radio frequency waveguide and a local oscillator waveguide. The cavity structure transversely penetrates through the radio frequency waveguide and the local oscillator waveguide. A quartz substrate is arranged in the cavity structure. The front surface of the quartz substrate is provided with a Schottky diode pair with a gallium arsenide substrate removed. The Schottky diode pair comprises two symmetrical diodes. The front faces of the two diodes are provided with metal anodes. The two diodes are the diode A and the diode B. The broadband terahertz harmonic mixer further comprises a front-end circuit and a rear-end circuit which are arranged on the quartz substrate. The front face of the metal anode of the diode A is provided with a gold wire A, and the gold wire A is connected with the front-end circuit. The front face of the metal anode of the diode B is provided with a gold wire B, and the gold wire B is connected with the rear-end circuit.

The invention provides a digital predistortion device and method for a band-limited simplified nonlinear filter. The device comprises a digital predistorter and a predistortion model training module of a predistortion model based on band limited simplified nonlinear filtering; the digital predistorter performs digital predistortion processing on an input digital baseband signal; a power amplifier outputs an analog radio frequency signal, generates an output digital baseband signal after the analog radio frequency signal is subjected to power coupling by an attenuation coupler, quadrature demodulation by a wideband quadrature demodulator, low-pass filtering by a low-pass filter and analog-to-digital conversion of a low sampling frequency, and inputs the output digital baseband signal after the input digital baseband signal and the output digital baseband signal are synchronized into a predistorter training module; the predistorter training module uses the least square algorithm to perform parameter training and then obtains power amplifier model parameters based on a band limited simplified nonlinear filter function, and sends the power amplifier model parameters to the digital predistorter. The invention uses the band limited method on a nonlinear filter function model to reduce the sampling frequency of a digital predistortion analog-to-digital converter, thereby reducing the difficulty and cost of realizing digital predistortion.

The invention is suitable for the technical field of electric power, and provides a uniform PWM modulation method on the basis of natural commutation. The method comprises the following steps: a per-unit value of a three-phase modulated wave is calculated; a real-time maximum value and a real-time minimum value of voltage of the three-phase modulated wave are calculated according to the per-unit value; the phase of the three-phase modulated wave shifts for 30 degrees; the real-time maximum value and the real-time minimum value of the three-phase modulated wave after phase shifting are calculated; zero-sequence components under three modulation modes of SPWM, SVPWM and DPWMx are calculated according to the real-time maximum value and the real-time minimum value of the voltage of the three-phase modulated wave before phase shifting and the maximum value and the minimum value of the voltage of the three-phase modulated wave after phase shifting; the zero-sequence components under the three modulation modes of SPWM, SVPWM and DPWMx are super-positioned in the three-phase modulated wave before phase shifting so that a uniform modulated wave signal is acquired; and the uniform modulated wave signal and a carrier wave signal are compared by a controller so that a driving signal for controlling a switch tube is acquired.

The invention provides an application software online debugging method based on a DCS. An embedded type device capable of operating application software and a computer device connected with the embedded type device are included, the embedded type device further comprises a data communication module and an application software data area, and the embedded type device and the computer device achieve data interaction through the data communicated module. The application software data area comprises global variables corresponding to local variables of application software one by one, and the computer device achieves reading, writing and accessing of data content of the application software through the global variables. The effect that in the fields such as nuclear power with high safety requirements, the application software operating in the embedded type device without an operation system is debugged is achieved. Furthermore, the application software online debugging method based on the DCS supports debugging of coded application software and supports onsite online debugging of the embedded type device.

The embodiment of the invention provides a method and device for Android plug-in development, which relate to the computer technical field. The method of the embodiment of the invention comprises thefollowing steps: compiling the common code and the common resource used by each plug-in project to generate a dependency package; compiling and packaging the source code of the host project and the dependency package to obtain the installation package of the host project, and compiling and packaging the source code of each plug-in project that does not contain the common code and common resourcesto obtain the installation package of each plug-in project; A load runtime environment is constructed in the installation package of the host project to load and run the installation packages of the plug-in projects. The method of the embodiment of the invention compiles the common resource and the common code into the host project in the form of an independent dependency package to provide the plug-in project for use, realizes the plug-in development of the APP project of the Android platform, decouples each module, greatly improves the compilation speed and the development efficiency.

The embodiment of the invention provides a clustering method for base station cooperation. The method comprises the following steps of: periodically acquiring a parameter summation influencing the statistical mean delay of users managed by a central controller at the period Tp by using the central controller; clustering base stations managed by the central controller by taking a clustering strategy adopted when the parameter summation is minimum; and transmitting base station clustering structure information obtained by the clustering to the base stations managed by the central controller. By the base station clustering method, system signaling overhead can be reduced, operation tasks can be separated, and difficulties in the implementation of the whole system can be greatly reduced at the same time of increasing the transmission rates of users on cluster edges, improve the user experiences and improve fairness for the users of the system.

The invention provides a detection circuit of an LC resonant transducer. The detection circuit comprises an FPGA-based SoPC system, a pulse generator, a transmitting coil, a reading coil and an analog-to-digital converter, the FPGA-based SoPC system controls the pulse generator to generate an excitation signal via the transmitting coil, the LC resonant transducer absorbs energy of the excitation signal and generates an attenuation signal via induction, the attenuation signal is received by the reading coil and sampled by the analog-to-digital converter, the FPGA-based SoPC system calculates a frequency spectrum of output signals of the LC resonant transducer via DFT, and the resonant frequency is detected. The invention also provides a detection method of the detection circuit of the LC resonant transducer. The frequency spectrum of the output signals of the LC resonant transducer is obtained, and a resonant frequency of the LC resonant transducer is obtained via a peak value detection algorithm. According to the detection circuit and method, complexity and excitation signals of the detection circuit of the LC resonant transducer have less interference in the transducer signals, and the measuring speed and portability are improved.

The invention relates to a vehicle-mounted network information security protection system, which comprises a security engine module, an application program interface module, an authentication module, a security communication module, a data encryption module, an attack protection module, an intrusion detection module and a log system module,wherein the security engine module is a dispatching center of the vehicle-mounted network information security protection system, and is used for establishing a processing flow and a management rule set of the vehicle-mounted network message; the application program interface module is used for providing data encryption and decryption services for an application program; the secure communication module is used for realizing network transmission encryption based on a vehicle-mounted network transmission layer communication protocol and an SSL/TSL encryption transmission protocol; the data encryption module provides algorithm support for data encryption and decryption; the intrusion detection module is used for collecting necessary data and information through methods of real-time mapping, redundant backup and the like of vehicle-mounted network messages; and the log system module is responsible for recording system operation, network flow and operation behaviors.

A signal subdivision system of high-accuracy double frequency laser interferometer comprises preprocessing circuit of measurement signal, preprocessing circuit of reference signal, digital phase demodulation circuit, clock signal generating circuit with cycle of T1, detection circuit of clock leading edge coincidence, clock signal generating circuit with cycle of T2, counter and operation treatment circuit for obtaining high accuracy of subdivision.

The invention provides an optical axis offset compensation method and an optical axis offset compensation device, which are applied to camera equipment comprising a camera lens. The method comprises the following steps: detecting the current focal length of the camera lens to obtain focal length range information corresponding to the current focal length of the camera lens; searching target position information of the effective pixel collection area matched with the focal segment information in the pixel collection total area according to the obtained focal length range information; and adjusting the position of an effective pixel collection area currently used by the camera lens according to the searched target position information, so that the camera lens performs image shooting based onthe adjusted effective pixel collection area. According to the method, the optical axis offset of the camera lens can be accurately corrected by adopting an electronic compensation mode with low implementation difficulty, and the optical axis offset compensation implementation cost is reduced.

The invention aims to provide an automatic automobile clock correction system capable of automatically correcting an automatic clock and a correction method thereof. The automatic automobile clock correction system comprises a clock processing unit and a clock display unit, wherein the clock processing unit comprises a clock signal generating circuit and a clock signal processing circuit; and the clock display unit receives and displays a clock signal transmitted from the clock processing unit; and the key point is that the clock processing unit is connected with a GPS receiving unit through a CAN bus. The correction method comprises the following steps: after the automobile is electrified, the clock processing unit receives a satellite clock synchronous signal by using the GPS receiving unit and corrects the local clock according to the synchronous signal; and after the correction is finished, the clock processing unit shields the satellite clock synchronous signal of the GPS receiving unit, times and generates the clock signal by using the clock signal generating circuit and the clock signal processing circuit arranged in the clock processing unit and transmits the clock signal to the clock display unit for displaying.

The invention discloses a mechanical arm trajectory tracking control method and device based on an instruction filter. The method comprises the following steps that a single-node mechanical arm systemmodel is built, and a single-node mechanical arm system state equation is considered to be input according to the single-node mechanical arm system model; a first virtual controller and a second virtual controller are established according to the single-node mechanical arm system state equation, and the instruction filter is established according to the first virtual controller and the second virtual controller; the instruction filter is established according to the first virtual controller and the second virtual controller; and trajectory tracking control is performed on a mechanical arm byusing a closed-loop control system. The mechanical arm trajectory tracking control method and device based on the instruction filter has the advantages that the application range is expanded, the design process of the controller is simple, and the implementation difficulty is low.

The invention provides a message transmission method and message middleware. The message middleware comprises a message sending service unit, a message sending queue, a message receiving service unit and a message receiving queue, wherein the message sending service unit is used for receiving a first calling request sent by a message sender, receiving each message sent by the message sender according to the first calling request, storing each message in the message sending queue, extracting each message from the message sending queue and sending each message; and the message receiving service unit is used for receiving each message sent by the message sending service unit, storing each message in the message receiving queue, receiving a second calling request of a message receiver, and transmitting the messages in the message receiving queue to the message receiver according to the second calling request. According to the scheme, the difficulty in realizing message transmission can be lowered.

The invention discloses a general-purpose interoperability test system and a test method thereof. The system comprises a main test control and protocol stack management platform, a general-purpose underlying simulation instrument and an antenna transmission module, wherein the main test control and protocol stack management platform comprises a general-purpose main test control module and a protocol stack substitution and adaptation module, the general-purpose underlying simulation instrument is used for carrying out the function of the physical layer and the switching between baseband signals and radio frequency signals, and the antenna transmission module is used for transmitting radio frequency signals and receiving radio frequency signals coming from a tested terminal. Based on the invention, the interoperability test on different network devices and terminals can be simulated as long as the protocol stacks in different network devices are changed, as a result, the network side hardware devices of different manufacturers do not need to be purchased any more, but each network device manufacturer provides a corresponding protocol stack, consequently, the interoperability test cost can be greatly decreased, and the difficulty in implementing the interoperability test can be reduced.

The embodiment of the invention discloses a method for accessing a network and belongs to the technical field of communication. The method comprises the following steps: an authenticator receives a broadcast message of a dynamic host configuration protocol DHCP from a client; the broadcast message is transmitted to configuration service equipment; the authenticator receives and records a first configuration message returned from the configuration service equipment; the authenticator carries out local or remote authentication on the client; the authentication is based on user identity authentication; and after the authentication is successful, the authenticator sends a configuration request to the configuration service equipment through utilizing the recorded first configuration message and requests to provide the client a second configuration message used in the session process. The embodiment of the invention also discloses a network access device and a system thereof.

The invention provides a power consumer information tagging method and device, electronic equipment and a storage medium. The method comprises the steps of obtaining three-phase electric meter data ofa user; clustering the three-phase electric meter data to obtain a typical load curve picture; classifying the typical load curve pictures by using a pre-trained VGG model to obtain power utilizationcharacteristic feature tags of the users; combining K-means clustering and a deep convolutional neural network to be used for power consumer information tagging, and obtaining a power consumer behavior portrait. The implementation difficulty is small, the sample size is large, all typical users can be covered, and the accuracy is high.

The invention relates to a structure for detecting the air impermeability of a battery bag case. The structure comprises a battery bag and is characterized in that a connector is fixedly arranged on the housing of the battery bag and is communicated with the interior of the battery bag; the battery bag is provided with a charging connector, a high-voltage output connector, a low-voltage connector, and a manual repairing switch connector; the other end of the connector is successively connected with a ball valve, a reducing valve, and a high-pressure gas source; and the connector is communicated with a pressure meter. The structure is simple and a detecting method is simple. A detecting process is low in implementing difficulty and good in adaptability. The structure and the method may detect the air impermeability at any place so long as the temperature is constant in a test process. Different parameters are set when temperature changes.

The invention provides a web form design method based on a mask. The method comprises the steps that a control base of the controls required by a form is built, and the controls are configured on a control selection interface; attribute lists corresponding to the controls respectively are built, and the attribute lists are configured on an attribute edit interface; a form preview interface is built, wherein the form preview interface is displayed according to the content of a currently designed form; the mask on the upper portion of the form preview interface area is built, and a mouse and a keyboard in the form preview interface is operated through mask interception; when the form preview interface is clicked with the mouse and the mask captures a mouse event, the control at the position is matched according to the position of the mouse, so that the control is set in a selected state, and the attribute value of the control is displayed in the attribute edit interface. By means of the web form design method based on the mask, a better user experience is provided, the form and the controls are completely displayed in the form preview interface of a form designer according to an actual effect, and what displayed is completely consistent with the actual effect.

The invention discloses a data push method, and the method comprises the steps that an agent node enables a second node, correlated with the recognition information, of a network segment to be added to a multicast group based on the recognition information carried by the data push instruction when a data push instruction transmitted by a first node; the agent node receives a data flow transmitted by the first node in a unicast mode; the agent node transmits the data flow to each second node in the multicast group in a multicast mode when the data flow is received. The invention also discloses a data push device. The method can reduce the implementation difficulty of network segment crossing multicast.

The invention mainly aims to provide an intelligent camera device and an off-network access control method thereof. The method comprises the following steps of receiving data frames according with the IEEE 802.11 protocol standard in an off-set network state, and switching to an access point mode according with the IEEE 802.11 protocol standard in response to an instruction included in the data frame; allowing access of an external work station for establishing communication connection, responding a request of the external work station and feeding back corresponding local storage data; and timely detecting the state is a non-external work station access state or not, and switching to a work station mode specified based on the IEEE 802.11 protocol for recovering access to a set network if no external work station accesses in a preset time. With the technology of the invention, picture files and/or video files generated by the intelligent camera device in an off-network state can be flexibly controlled by the external work station, and the technology implementation is simple and effective.

The invention discloses an intelligent sofa, which is characterized in that a dust cleaning device adopts two rotating hairbrushes arranged side by side to sweep the ground under the sofa, and dust suction nozzles are arranged in the hairbrushes or on one sides of the hairbrushes to suck dust, so that the ground is effectively cleaned; a lead screw nut kinematic pair with a compact structure sizeis adopted as a driving device for transverse movement and longitudinal movement of the dust cleaning device, and a gear transmission mode is adopted to drive a lead screw, so that the dust cleaning device can powerfully cover the ground at the bottom of the whole sofa without dead angles; the air pipe connector is arranged on the sofa side plate, the exhaust pipe of the household dust collector is connected with the air pipe connector, suction force is provided for the dust suction nozzle, and the implementation difficulty of the intelligent sofa dust cleaning device is greatly reduced.

The invention provides a 3-mm waveband receiver and application thereof. The 3-mm waveband receiver at least comprises a receiving antenna, a low-noise amplifier, a local oscillation signal source, an orthogonal frequency mixer, an orthogonal coupler and an intermediate-frequency amplifier, wherein the receiving antenna is used for receiving radio-frequency signals; the low-noise amplifier is used for amplifying the radio-frequency signals received by the receiving antenna; the local oscillation signal source is used for generating local oscillation signals; the orthogonal frequency mixer is used for mixing the frequency of output signals of the low-noise amplifier and the frequency of the local oscillation signals generated by the local oscillation signal source, and generating and outputting two paths of orthogonal intermediate-frequency signals; the orthogonal coupler is used for performing power synthesis on the two paths of output signals of the orthogonal frequency mixer, and generating and outputting one path of single side band signals; the intermediate-frequency amplifier is used for amplifying the single side band signal outputs by the orthogonal coupler. The 3-mm waveband receiver disclosed by the invention can be used for greatly lowering the cost and the implementation difficulty and also changing the connection sequence of an I/Q output port of the orthogonal frequency mixer and two input ports of the orthogonal coupler so as to realize single side band output and well inhibit mirror image signals.

The invention discloses a device and method for detecting high-speed optical communication transmitting equipment, and belongs to the optical transmitting equipment and signal detection technology inthe optical communication field. The device comprises a high-speed photoelectric detector unit, a low-speed analog-to-digital converter unit, an equalization filtering processing unit, a software synchronous processing unit, and a display unit. The method comprises the following steps: 1, outputting a modulated optical transmitting signal through the optical transmitting equipment; 2, converting the optical transmitting signal output by the optical transmitting equipment into a baseband analog electric signal; 3, sampling the baseband analog electric signal to obtain a discrete digital sequence; 4, performing the digital equalization filtering processing to obtain an equalization digital sequence; 5, performing the chirp Z-conversion software synchronous treatment to obtain equivalent synchronization time of the equalization digital sequence; and 6, performing eye pattern reconstruction and display on the equalization digital sequence, comparing with the preset eye pattern template tojudge whether the optical transmitting equipment is qualified. Through the device and method disclosed by the invention, the realization difficulty and cost are effectively reduced; the small and portable analyzer can be developed so as to satisfy the demands of quickly and conveniently checking the products.

The invention discloses a demodulator device with a function of frequency calibration based on adaptive equalization, and relates to the field of wireless communication. According to the invention, a Costas loop is added at the front end of an adaptive equalizer, and a demodulator can be enabled to have a function of removing intersymbol interference during a frequency offset through the characteristic of big frequency offset resistance of the Costas loop. After the demodulator receives an outputted baseband signal after digital downconversion and low-pass filtering, the Costas loop is used at first to remove frequency offset caused by different sources of clocks at receiving and transmitting ends, and then the adaptive equalizer is used for removing the intersymbol interference between adjacent code elements. The device is characterized in that there is no need to require that the stability of clock sources at two communication ends is high, the repeatability is good and the performance is excellent, so the device is especially suitable for high-speed communication of wireless channels, such as microwave communication, scatter communication and so on.

The invention provides a pixel structure of a multi-sampling CMOS image sensor and an ultra-high speed image acquisition method thereof in order to solve the technical problems of high cost, poor imaging performance and complex process when the ultra-high speed imaging capability of the CMOS image sensor in tens of nanoseconds level is realized by adopting the prior art. Each pixel structure comprises a photodiode; the n output ports of the photodiode are all connected with a control switch tube; at the output end of each control switch tube, a floating diffusion region capacitor is connected;n floating diffusion region capacitors share a control transistor circuit; a charge output strobe switch is arranged between each floating diffusion region capacitor and the control transistor circuit; n >= 2. The frame interval between the multi-frame buffered images is determined by the transfer time of the image signal from the photodiode to the capacitance of the floating diffusion region. Under the modern CMOS technology, the transfer time can reach the order of hundreds of nanoseconds, and the ultra-high-speed continuous multi-frame imaging under the condition of hundreds of nanosecondstime resolution of the CMOS image sensor can be realized.

The invention discloses a satellite geometric feature and attitude estimation method based on a foundation observation luminosity signal. The method comprises the following steps: S1, establishing a satellite luminosity signal observation model under a foundation observation condition; S2, establishing a 'geometry-attitude-luminosity' database of the satellite; S3, identifying a geometric model and a scale of the satellite; S4, establishing an attitude kinematics equation of the observed satellite; S5, setting an initial parameter of the non-destructive Kalman filter; S6, taking the attitude kinematics equation and the satellite luminosity signal observation model as a time updating model and an observation updating model of a non-destructive Kalman filtering algorithm respectively, and performing updating estimation on satellite attitude parameters at the next observation moment by adopting the non-destructive Kalman filtering algorithm; and S7, taking the satellite attitude parameter estimated in the step S6 as a new observation moment satellite state parameter, repeating the step S6, and stopping iteration when the error of a satellite attitude parameter estimation value is smaller than a set threshold value or the satellite exceeds an observation range so as to obtain a high-precision satellite attitude parameter estimation value.

The invention relates to a heart rate detection method and apparatus, computer equipment and a readable storage medium. The heart rate detection method comprises the following steps: acquiring face video data of a testee, and extracting an original face color change signal corresponding to the testee from the face video data; performing denoising and filtering on the original face color change signal to obtain a face color change signal; and extracting a pulse wave signal corresponding to the testee from the face color change signal, and acquiring heart rate data of the testee according to thepulse wave signal. By adopting the method, the detection precision of heart rate detection can be improved.