55results about How to "Periodic" patented technology

The invention discloses a high-cabinet personnel scheduling prediction method based on bank outlet business data. The method comprises the steps of obtaining first historical data before an outlet ends a first time node; establishing a prediction model, and based on the first historical data, generating scheduling data required by prediction of the network points in the period from the first timenode to the second time node; acquiring second historical data before the website stops the second time node; establishing a calculation model, and generating actually required scheduling data of a network point between the first time node and the second time node based on the second historical data; and modifying parameters of the prediction model based on the difference between the actually required scheduling data and the actually required scheduling data. According to the method, the number of high-cabinet scheduling people in each website within several days is predicted, the labor cost is saved, and the efficiency is improved.

The invention relates to a visible light communication system based on a power line carrier with the code rate self-adapted to a QC-LDPC coding way and an operating method of the visible light communication system. The visible light communication system comprises an QC-LDPC coding module, a PLC module, an intermediate switching module, a VLC module and a QC-LDPC decoding module which are connected in sequence, wherein the PLC module is connected with the intermediate switching module through a power line; the VLC module comprises an LED driver, an LED, a photoelectric detector, an optical power meter, an amplifier and a wave filter which are connected in sequence. By virtue of the QC-LDPC coding way, the reliability of the system is improved; a proper code rate is regulated through a self-adaptive way, so that the redundancy of transmitted information is reduced, the network cost is reduced, and the transmission rate is increased.

The invention discloses a frame synchronous detection method based on a zero correlation zone (ZCZ) sequence, which is used in a wireless communication system. The frame synchronous detection method comprises the following steps of: firstly, receiving the sequence, and carrying out cross-correlation operation with a local ZCZ sequence; secondly, carrying out conjugate point operation between a front symbol block and a rear symbol block on a cross-correlation operation result; and finally, carrying out a real-part maximum value of each symbol block with a threshold value, and judging whether a frame is coming or not. In order to make the maximum value more apparent, the conjugate point operation between the front symbol block and the rear symbol block on the cross-correlation operation is carried out; and if peak detection is required to be more apparent, the conjugate point operation between the front symbol block and the rear symbol block can be carried out for more times. Compared with the traditional frame detection method, the method is easy to operate and implement, and whether the frame is coming or not can be accurately judged. The method can be applicable to time synchronization, and an initial point of a signal is determined by finding the position of a negative pulse.

The invention provides an inertial navigation positioning method based on a CCD star sensor and an accelerometer, which comprises the following steps of: (1) after initial alignment is finished, acquiring the output data of the quartz flexible accelerometer; (2) acquiring the output of the CCD star sensor; (3) acquiring the output positioning information in an inertial navigation algorithm in an error-free state to obtain the transfer matrix of an earth based coordinate system, i.e. an e system relative to a navigation coordinate system, i.e. an n system; (4) solving the transfer matrix of the e system relative to an i system; (5) resolving to obtain an attitude matrix through the information given in the steps (1), (2), (3) and (4); and (6) converting the accelerometer onto the navigation coordinate system from a carrier coordinate system through the attitude information resolved in the step (5), and outputting the carrier speed and the navigation positioning information. The invention has position information feedback, thereby having the advantages of periodicity and high positioning precision.

The invention provides a telecom user loss prediction method and device based on user internet behaviours. The method comprises the steps of: obtaining at least one internet behaviour data of a targetuser; evaluating the internet behaviour data, and determining an evaluation parameter corresponding to the internet behaviour of the target user; and, on the basis of the evaluation parameter, predicting whether the target user is a potential loss user or not, and predicting the loss probability of the target user. According to the telecom user loss prediction method and device based on the userinternet behaviours provided by the invention, on the basis of internet behaviours of users, subjective feelings and wishes of the users are comprehensively considered based on the statistics; therefore, potential loss users can be predicted in advance; furthermore, a user loss reason can be evaluated completely and accurately; the result is true and reliable; simultaneously, the user loss has periodicity; the potential loss users are predicted in advance; therefore, the users can be discovered in time, and retained by adoption of a corresponding marketing method; the pertinence is high; and the success rate is high.

The embodiment of the invention discloses an attitude control method, device and system for a satellite platform with a rotating load. The attitude control method of the satellite platform includes: measuring an actual attitude parameter of the satellite platform; comparing the actual attitude parameter and a target attitude parameter, and determining an attitude deviation; generating a first control instruction based on the attitude deviation; determining a learning period parameter of a repeating controller of the satellite platform according to a motion law parameter of the rotating load, wherein the repeating controller generates a second control instruction according to the learning period parameter and the first control instruction; and controlling the attitude of the satellite platform by using the second control instruction.

The invention discloses a polar orbit constellation GEO interference avoidance method based on polar orbit satellite attitude bias. Constellation coverage continuity is not considered in a current polar orbit constellation GEO interference avoidance method. In order to solve the problems that the polar orbit constellation service is possibly interrupted, the frequency interference avoidance of theGEO satellite is realized through the attitude continuous bias of the polar orbit constellation satellite, and meanwhile, the polar orbit constellation coverage is continuous and the coverage overlapping area margin is maximum through the optimization of the satellite attitude bias rule, so that the polar orbit constellation coverage continuity is ensured.

The present invention relates to preparation process of periodical nanometer titania line, is especially template process of preparing periodical nanometer titania line, and belongs to the field of nanometer material preparing technology. The present invention prepares periodical nanometer titania line by using alumina with periodical high ordered micropore array as template and through a sol-gel process. The present invention is superior to background technology in that the template process can obtain periodical nanometer titania line product with effectively controlled periodical distribution and size of nanometer titania lines, is simple, feasible, low in cost and pollution-free.

The invention discloses a robust watermarking technology for medical images on the basis of Arnold scrambling transformation and DWT (discrete wavelet transform)-DFT (discrete Fourier transform), and belongs to the field of multimedia signal processing. The robust watermarking technology includes embedding watermarks and then extracting the watermarks, and particularly includes steps of (1), performing Arnold transformation for watermarks to be embedded; (2), performing DWT for a medical image, performing DFT for approximation sub-images of the medical image, and extracting vectors of a feature; (3), generating a binary logic sequence via a Hash function by the vectors of the feature and the preprocessed watermarks so as to complete the process for embedding the watermarks; (4), performing DWT for a medical image to be measured, performing DFT for approximation sub-images of the medical image to be measured and extracting vectors of a feature; (5), extracting watermarks by the aid of the Hash function and a binary logic sequence stored in a third party; and (6), obtaining the original watermarks via Arnold inverse transformation so as to complete the process for extracting the watermarks. The robot watermarking technology has an important significance in protecting information of patients during remote medical treatment.

A tunable phase-shift fiber bragg grating relates to a phase-shift fiber bragg grating, in particular to a phase-shift bragg grating with a transmission spectrum with the tunable characteristic, which is based on the fiber bragg grating fabry perot structure. The invention provides a tunable phase-shift fiber bragg grating with fast tuning speed, simple structure, high stability and low cost. The grating is provided with two segments of fiver bragg gratings; a sleeve tube the inner diameter of which is matched with the outer diameter of the fiber bragg grating is inserted into the two segments of the fiber bragg gratings; the gap between the two segments of the fiber bragg gratings is filled with index matched liquid; a gap length adjusting mechanism is arranged in the gap between the two segments of the fiber bragg gratings.

The invention discloses an air-cooled intercooler which comprises a core. The core comprises an air inlet chamber, an air outlet chamber, a radiating tube and a radiating fin, two ends of the radiating tube are respectively communicated with the air inlet chamber and the air outlet chamber, and a spoiler is arranged in the radiating tube. An air inlet and an air outlet are respectively connected onto the air inlet chamber and the air outlet chamber, the spoiler is of deoxyribose nucleic acid (DNA) duplex structure, and the spoiler is formed by two frameworks of the duplex structure and a bond-shaped fin connected between the two frameworks. The air-cooled intercooler is provided with the spoiler of the DNA duplex structure and has the advantages of good heat transfer effects and small flow resistance.

The invention discloses a channel estimation method for single carrier frequency domain equalization under a low energy dispersion multipath channel. A problem of channel estimation performance loss of an existing single carrier equalization system under a low energy dispersion multipath environment can be improved effectively by using the channel estimation method disclosed by the invention. Segmentation is carried out through setting a value of an approximate signal to noise ratio, different numbers of useful signal paths and different threshold values are selected in different signal to noise ratio intervals, and then time domain noise reduction processing of channel estimation is carried out. The channel estimation method disclosed by the invention is not only applicable to extracting the useful signal paths accurately in a high signal to noise ratio environment. In addition, when most of the useful signal paths are possibly submerged in noises and cannot be distinguished in a low energy multipath channel environment, the low energy multipath channel environment is divided into a high signal to noise ratio interval, a middle signal to noise ratio interval and a low signal to noise ratio interval by adopting the method, the useful signal paths can also be extracted accurately, and the performance of channel estimation is improved.

Example embodiments presented herein are directed towards a wireless device (101) and a network node (102, 103, 104, 110, 111, 115), and corresponding methods therein, for prescheduling uplink communications in a wireless network. Such prescheduling is performed prior to the time the uplink communication is needed. According to the example embodiments, the prescheduling is performed with the network node having knowledge of a communication pattern of the wireless device via at least one prescheduling parameter obtained by the network node (the base station, or a core network node), either transmitted by the wireless device or else retrieved by the network node from subscription or historical data. The prescheduling parameter may relate to the application or service that has been activated,and a prescheduling cancellation is sent when it is halted.

The invention discloses an ultrasonic roadway surface convergence analyzer. The ultrasonic roadway surface convergence analyzer comprises an installing pole, an instrument cabin, a left ultrasonic transceiving transducer, a right ultrasonic transceiving transducer, a lower ultrasonic transceiving transducer and other parts. The analyzer is fixed to a top plate and a bottom plate of a mine roadway or the two sides of the mine roadway through the installation pole. After initialization, the shape and dimensions of the initial section of the mine roadway are recorded, so that an initial image of the section of the roadway is obtained; after the analyzer enters a normal working state, the left ultrasonic transceiving transducer, the right ultrasonic transceiving transducer and the lower ultrasonic transceiving transducer are started according to set time, ultrasonic signals are emitted to the top plate, the bottom plate and the two sides of the roadway and are collected, and the collected ultrasonic composite echo signals are processed through a processor, so that a composite image of the section of the roadway is obtained, wherein compared with the initial image, the deformation and convergence amount of the top plate, the bottom plate and the two sides of the roadway are obtained. The ultrasonic roadway surface convergence analyzer is easy to install, stable and reliable in measurement and capable of achieving non-contact online monitoring of the convergence amount of the whole section of the top plate, the bottom plate and the two sides of the mine roadway, thereby providing online monitoring data of the convergence amount of the whole section for the special project of the mine roadway surface convergence amount.

The invention provides a super-hydrophilic metal surface micro-nano structure and a manufacturing method thereof. The structure comprises a metal substrate base body, and three groups of mutual-angledparallel groove arrays formed by grooves and prismatic protrusions are formed on the metal substrate base body. The manufacturing method comprises the following steps that firstly, a metal substrateis provided; then the metal substrate is cleaned and dried; then a laser beam is used for scanning the metal surface to obtain the metal substrate with a rough gully-shaped micro-nano structure on thesurface; and finally, deionized water is used for ultrasonically cleaning the metal substrate and the metal substrate is dried. According to the manufacturing method, the rough gully-shaped micro-nano structure is constructed on the metal surface by virtue of a laser etching technology, the super-hydrophilicity is given to the surface of the metal, the structure is simple, and the manufacturing method is environment-friendly, simple and efficient.

The invention discloses a length measuring and tracing method using a graphene bond length as a measuring reference. The graphene bond length is used as a length measuring and tracing reference, length measuring and tracing are carried out on an object to be detected by the number of detected graphene bond lengths, and sub-nanometer grade precision length measuring and tracing are realized. Ultra-precision synchronous motion control connection is carried out on the object to be detected and a graphene reference sample bearing table, the number of the graphene bond lengths is scanned to represent the motion length of the graphene reference sample bearing table, and the motion of the graphene reference sample bearing table is detected in real time, so that the sub-nanometer grade precision length measuring is carried out on the object to be detected, and sub-nanometer grade precision length measuring and tracing are realized. As graphene lattices are used as the length measuring and tracing reference, the length measuring and tracing method has the characteristics of high stability, high measuring precision capable of reaching a sub-nanometer grade, simpleness, reliability and the like and has wide application prospects in the field of ultra-precision measuring and tracing.

The invention discloses a method and device for capturing L2C signals in the GPS. The method includes the steps of firstly, generating periodic local CM code sequences, and adding the number zero behind each CM code sequence; secondly, setting up local composite codes according to the CM code sequences which are generated in the first step and where the numbers zero are added; thirdly, sampling the local composite CM code sequences generated in the second step to obtain N point long sequences and processing the N point long sequences; fourthly, sampling intermediate-frequency signals processed by the front end of a receiver according to the sampling rate; fifthly, conducting digital down conversion on the signals sampled in the fourth step to obtain carrier frequency cells to be searched; sixthly, selecting N point receiving signals from the fifth step to be processed; seventhly, multiplying the result obtained in the third step by the result obtained in the sixth step, and conducting processing to obtain N related values; eighthly, detecting the (W+nN)th code phase position according to the code phase position corresponding to the largest related value if the largest related value in the seventh step is larger than a preset capturing threshold; ninthly, adjusting a digital down conversion unit so as to search the next carrier frequency cell till the whole space to be searched is completely searched if no related values larger than the preset capturing threshold exist in the seventh step.

The invention relates to a monitoring and management system based on a lithium ion super capacitor. The system is composed of a main power circuit, an active balancing unit, a collection unit, and a central control unit. The main power circuit is formed by series connection of a current sensor, a fuse, a super capacitor group, a main positive contactor, a total voltage sensor and a DC / DC bi-directional converter. The active balancing unit connected with the super capacitor group carries out single voltage balancing on the super capacitor group. The collection unit connected with the super capacitor group and the active balancing unit collects single voltage information and temperature information from the super capacitor group and forwards an instruction to the active balancing unit. The central control unit connected with the collection unit, the current sensor, the main positive contactor, the total voltage sensor and the DC / DC bi-directional converter exchanges data and instructions with the collection unit and the DC / DC bi-directional converter, receives data from the current sensor and the total voltage sensor, and controls on or off of the main positive contactor. The system has the following advantages: the control strategy of the super capacitor group is mastered as a whole; and charging and discharging operations of the super capacitor group are controlled based on needs.

The invention provides a multivalent aptamer DNA nano ladder and a preparation method and application thereof. Natural DNA molecules are used as raw materials, on the basis of the DNA origami theory,the DNA nano ladder is constructed by utilizing the special property of a rolling circle amplification product, a large number of aptamers are introduced, a drug delivery system which is simple in design and high in drug loading capacity and has target specificity and biocompatibility is constructed, and through aptamer or drug replacement, the carrier can also be applied to various types of target cells.

The invention discloses a video synchronous sending method supporting high-resolution LED dome screen display, which belongs to the technical field of video synchronous processing, and is characterized by comprising the following steps: a, dividing any single channel 4K high-resolution video frame into N parts of data; b, performing data caching on each part of the video data by an interval N-rowcaching mode, and sequentially storing the video signals by taking N address blocks as a group; and c, taking out the video data from the data cache, and respectively sending the video data to N gigabit Ethernet ports in a parallel sending mode according to 2160 / N rows of data in each channel by taking the groups as units until all the groups are completely sent. For a single channel, a complete 4K high-resolution video frame can be split into multiple channels of Ethernet to be sent respectively, synchronous sending of the 4K high-resolution video frame in the channel can be guaranteed, and therefore 4K high-resolution LED dome screen display can be well supported.

The invention discloses a floating-type wave energy conversion device, which comprises a hollow shell, a wave-approach assembly for collecting wave energy, and a conversion assembly for converting thewave energy into electrical energy. The wave-approach assembly comprises wave-approach plates arranged outside the shell, and wave-approach plate idler wheels connected with the wave-approach plates,a moving track is formed in the shell, and the wave-approach plate idler wheels are driven by the wave-approach plates to roll along the moving track; the conversion assembly comprises generators, asupporting sleeve rod, connecting rods and positioning gears, wherein the generators, the supporting sleeve rod, the connecting rods and the positioning gears are arranged in the shell, and the positioning gears are used for positioning the connecting rods; the positioning gears are in transmission connection with rotating shafts of the generators; a sliding piece slidably connected with the supporting sleeve rod is arranged on the supporting sleeve rod; one ends of the connecting rods are hinged to the sliding piece, and the other ends of the connecting rods are hinged to the wave-approach plate idler wheels; the connecting rods are further provided with racks engaged with the positioning gears; and the wave-approach plates are impacted by waves to drive the connecting rods to move through the wave-approach plate idler wheels, and the racks arranged on the connecting rods drive the positioning gears to rotate, and thus drive the generators to generate electricity.

Interactive digit information transmission characterizes up / down stream signals are in the synchronous step structure. Down-stream signals modulated by TDS-OFDM in down-stream channel in which its frame is PN synchronous signals or mixed synchronous signal frame and in up-line channels, up-line signals modulated by multi-user by burst TDMA, in which its frame synchronous code is PN in 6 step m sequence. The up-line signal frame is made up of multi-user signals shared by multiple user composed of cut-in request and data signals, numbered according to the signal frame structure. The up-line channel cut-in is controlled by the down-stream channel after synchronization via random synchronous cut-in code. Up-link / down stream signals frame structures are synchronized with natural time to support bipolar transmission.

The invention relates to the technical field of water supply pipe network management, and discloses a water fingerprint prediction algorithm, which comprises the following steps of: 1) obtaining historical data of partitions needing to be calculated; 2) predicting data in the future 24 hours by using a time sequence method; 3) calculating data in the future 24 hours by using a moving average mode;4) calculating data in the future 24 hours by using a linear regression mode; 5) using a Kalman filtering method to integrate the actual collection data and the above two calculation data; and 6) calculating different confidence intervals of each algorithm by using a Kalman filtering algorithm. According to the algorithm, the credibility of various algorithms is calculated through Kalman filtering; prediction of comprehensiveness, compared with the prior art, the method has the advantages that the method can cope with various different special conditions, the application range is wider, the selected centralized basic algorithms have different characteristics and adapt to different scenes, and the situation that abnormal changes of returned data may be caused by various reasons and normalmonitoring and analysis of the data are affected by water meter flow data collected by remote transmission equipment is avoided.

The invention discloses a permanent magnet spherical motor point-to-point motion track planning method based on a sine acceleration function and application thereof. The method is characterized in that a permanent magnet spherical motor rotor is regarded as a research object, firstly a Euler rotation angle or coordinates of two points are given, and the Euler rotation angle is inversely solved by adopting a method of reversely solving the Euler rotation angle according to the coordinates of the two points; then, an expression of the sine acceleration function is solved according to the operating time and initial conditions, and finally a final control torque is obtained according to a rotor dynamics equation. By the adoption of the method, permanent magnet spherical motor point-to-point motion track planning is achieved, the method is applied to complicated and continuous track planning, the adverse influence of input signal impact, non-continuous change and other factors on a control object can be effectively reduced, and accordingly the control accuracy of a control system and the stability of motor operation are improved.

In the position control system, multiple feedbacks such as displacement and speed are used to improve control accuracy. The grating has the advantages of precision, large range, and low cost as displacement feedback. This paper proposes the use of wavelet transform to realize the dual-parameter simultaneous extraction of the displacement and velocity of grating Moiré fringes. The scale factor corresponds to the velocity, the translation factor corresponds to the displacement, and the modulation changes The traditional grating Moiré fringe only measures single parameter of displacement and multi-parameter sensor realizes multi-parameter feedback, which is of great significance for improving positioning accuracy and simplifying the structure of the positioning system.

The invention provides an image forming apparatus capable of easily eliminating the image unevenness based on the speed change generated by a transfer roller. An image forming apparatus including a latent image bearing drum on which a latent image is formed, an exposure unit that exposes the latent image bearing drum, a developer unit that develops the latent image formed on the latent image bearing drum, a transfer medium onto which the image developed by the developer unit is transferred, and a transfer roller that transfers the image from the transfer medium to the transfer material, the transfer roller having a concaved portion extending in the axial direction and a support portion disposed on the outer circumference of the roller that supports the transfer material, where the outer circumference of the transfer roller being an integral multiple or an approximate integral multiple of the circumference of the latent image bearing drum.

The invention discloses a frequency hopping signal feature extraction and parameter estimation method, which overcomes the problems of mutual restriction of time and frequency resolution, existence of cross terms and TT transform being sensitive to noise in the prior art. The steps are: 1. Frequency hopping signal sampling; 2. Make smooth pseudo Wigner time-frequency transform; 3. Make TT transform based on SPWVD transform; 4. Draw SPWVD‑TT transform diagram; 6. Find the upper envelope curve and remove the DC component; 7. Estimate the frequency hopping period: perform Fourier transform on the upper envelope curve after removing the DC component, and the frequency corresponding to the maximum amplitude value in the obtained amplitude-frequency diagram is is the estimated value of the frequency hopping rate, and the reciprocal of the frequency hopping rate is the estimated value of the frequency hopping period; 8. Estimated frequency hopping time: pass the remaining peak time points t 1 ,t 2 ,...,t k‑1 Estimate the frequency hopping moment; reduce the error by the cumulative average method, and the initial frequency hopping moment is estimated as