702 results about "Problem of time" patented technology

The invention discloses an automatic monitor for an angle of a base station antenna and an automatic monitoring method. The monitor and the method utilize an MEMS sensor to accurately measure a lower inclination angle of the base station antenna through the principle of a gravity accelerometer, utilize the principle of a reluctance sensitive device sensor to measure an azimuth angle of the base station antenna and calculate and correct the azimuth angle so as to eliminate the deviation caused by magnetic disturbance measured by the position of the antenna and ensure the measuring accuracy, and utilize GPRS transmission and IP transmission modes to automatically transmit the antenna angle data obtained by measuring to a network management center. The monitor and the method solve the inaccurate problems on installation and adjustment of the base station antenna in the prior modes, solve manual measurement error or instability, solve the measurement error influenced by the magnetic disturbance at the position of the antenna, solve the problem that the antenna angle change is not discovered in time, and solve the problem of time and labor wastes for acquiring the antenna angle information.

The invention discloses a construction optimizing and operating method of an automatic fixed-point picking-up system of a logistics express. A system optimizing scheme containing a picking-up machine layout, a customer demand point attribution division and an express delivery line is generated according to the geographical position, demand amount and relevant logistics cost of a demand point of city express customers. When the system operates, a delivery center classifies expresses according to an automatic picking-up machine service range of the delivery center and the expresses are delivered by delivery workers according to an optimized delivery line scheme; and meanwhile, picking-up information is sent to the customers. After the customers pick up the expresses, the information is fed back to the delivery center by a picking-up machine so as to finish the whole express delivery task; otherwise, the customers are manually called to pick up the expresses; and if the customers cannot be contacted, the expresses are sent back to sending places to finish the delivery task. By virtue of the operation of the system, the abutting problem of time and space of the delivery workers and picking-up persons can be effectively solved in the express delivery process, so that the express delivery cost is reduced, the whole efficiency is improved, and the low carbonization and greening of the logistics express are realized.

The invention discloses a method for analyzing the fatigue life of a steering knuckle, comprising the following steps: 1) obtaining the fatigue load of the steering knuckle; 2) carrying out uniaxial tensile material test on the use material; 3) if the fatigue load is under the static load condition, the elastic-plastic finite element analysis method is adopted to solve the problem; or, if it is the actual pavement load spectrum, the elastic-plastic finite element analysis is carried out on the points exceeding the yield strength by elastic finite element method and linear superposition method,and the modified stress-strain results are obtained. 4) analyzing the biaxiality of the obtained stress response in time domain to determine the load state of the steering knuckle; 5) calculating thedamage accumulation and life of steering knuckle. The present invention solves the problem of time-consuming finite element solution under the input of actual pavement load spectrum, at the same time, the stress and strain of the material entering the plastic phase are considered, so that the result is more accurate, and fatigue analysis is carried out by combining the static load condition or the single channel static load condition, and more references are provided in the design phase.

The present invention provides a message transmission method and device. The method comprises: an SDN controller sends a first flow table to a first virtual switch, when the first virtual switch receives a message sent by a first virtual machine to a second virtual machine, the first virtual switch sends the message to a virtual router through a VXLAN tunnel built between the virtual router and the first virtual switch; when the SDN controller receives the message sent by the first virtual machine to the second virtual machine, a second virtual switch corresponding to the second virtual machine is obtained, and a second flow table and a third flow table are generated; the SDN controller sends the second flow table to the virtual router, and when the virtual router receives a message, the virtual router sends the message to the second virtual switch through a VXLAN tunnel built between the virtual router and the second virtual switch; and the SDN controller sends the third flow table to the second virtual switch, and when the second virtual switch receives a message, the second virtual switch sends the message to the second virtual machine. The problems of time delay, packet loss and the like of business access may be avoided.

The invention relates to a horizontal automatic adjusting hanger in a polar coordinate mode and a method thereof. The method comprises: adopting a double-layer bearing box body, arranging a rotatable balancing beam at an upper layer of the box body, arranging a wing beam at the bottom of the box body, and hanging a loaded hanger structure by means of a hook of the wing beam; and arranging a movable balancing block in the balancing beam, arranging a servo motor and a reduction box driving the balancing block at one end of the balancing beam, and arranging the servomotor and the reduction box driving the balancing block, and an inclination angle sensor and a controller at the lower layer of the box body. The method has the characteristics of quickness, safety and high efficiency, and solves the problems of time waste and danger when load is adjusted to be horizontal; and during adjustment, data obtained by the inclination angle sensor are transmitted to the controller, the controller sends out command to drive the two servo motors, the balancing beam uses the servo motors to change angle of the balancing beam through the reduction box, and the balancing block uses the servo motors to rotate a screw rod to adjust position of the balancing block through the reduction box, so as to change balance moment generated by the balancing block and achieve horizontal adjustment of the load.

The invention relates to a time slot allocation method and system, and aims to solve the problem of time slot allocation under a time slot resource multiplexing condition in an Internet of vehicles environment and prevent resource collision during selection of idle time slots for vehicles. The method comprises the following steps: a time slot information acquisition module acquires the identifier of a vehicle, current location information and unoccupied time slot information; a time slot occupation state updating and maintaining module maintains a time slot resource occupation state table according to the information; when a time slot information application module receives an application time slot request of the vehicle, an idle time slot matching module allocates time slot resources to the vehicle according to the application time slot request of the vehicle and the currently-maintained time slot resource occupation state table.

The invention relates to a method for carrying out mangrove forest map making on intermediate resolution remote sensing image by utilizing object-oriented classification method, which relates to a method for mangrove forest map making and solves the problems of time and labor waste, bad timeliness and serious neglected and wrong classification of mangrove forest in positioning and map making of mangrove forest map making through conventional means at present. The method comprises the following steps: firstly, carrying out ortho-rectification and geometric exact correction on Landsat TM data so as to obtain Landsat TM images after registration; secondly, carrying out multi-layered multi-dimensioned division on the Landsat TM images after registration, wherein each division unit is used as an object; thirdly, extracting textural and topological characteristics, and calculating normalized vegetation index and ground surface humidity index; fourthly, removing a non-vegetated object so as to obtain a vegetated object; fifthly, extracting a mangrove forest object from the vegetated object; sixthly, exporting the mangrove forest object so as to generate a mangrove forest vector; and seventhly, manufacturing a mangrove forest thematic map. The method disclosed by the invention is used for mangrove forest map making.

The invention provides a citrus picking robot system and a control method thereof. The picking robot system comprises a picking robot and a control system. The picking robot comprises a crawler type movable platform, a shell, a mechanical arm mounting platform, a mechanical arm, a binocular head, a monocular head and a picking mechanism. The control system comprises a central processing unit, an image processing module, a movable platform control module, a mechanical arm driving control module and a picking mechanism driving control module, and the image processing module, the movable platform control module, the mechanical arm driving control module and the picking mechanism driving control module are in control connection with the central processing unit. The picking path is planned by the central processing unit in advance, picking is precisely controlled through an inverse kinematics algorithm, the picking precision is high, and the picking efficiency is high. The picking robot executes picking according to the preset path and is good in navigation performance, and the problem of time consumption during picking can be solved. Whether the picking task is completed or not is circularly judged at each picking point, and therefore the problem that fruits are missed when picked can be solved, and manual secondary picking is not needed.

The invention discloses a text clustering multi-document automatic abstracting method and a system for improving a word vector model. The CBOW of the Hierachic Softmax belongs to the field of large-scale model training, and the CBOW of the Hierachic Softmax belongs to the field of large-scale model training. Based on the method, a TesorFlow deep learning framework is introduced into word vector model training; the problem of time efficiency of a large-scale training set is solved through streaming processing calculation, TF-IDF is introduced firstly during sentence vector representation, thenthe semantic similarity of a semantic unit to be extracted is calculated, weighting parameters are set for comprehensive consideration, and a semantic weighted sentence vector is generated; beneficialeffects are as follows. The advantages and disadvantages of semantics, deep learning and machine learning are comprehensively considered; density clustering and convolutional neural network algorithms are applied. Intelligent degree is high, according to the method, the statement with high relevancy with the central content can be quickly extracted to serve as the abstract of the text, various machine learning algorithms are applied to the automatic text abstract to achieve a better abstract effect, the method is possibly the main research direction in future in the field, and in addition, the system according to the invention supplies a tool for automatic extraction of a document abstract based on the method.

The invention discloses a method for suppressing random noise in seismic exploration based on VMD-TFPF, which includes the following steps: (1) decomposing a noisy signal; (2) calculating the cross correlation coefficient, and judging modal components needing to be filtered; (3) filtering modes screened out; and (4) getting a de-noised signal through calculation. Seismic random noise can be effectively attenuated, and the effective signal amplitude can be well maintained in the filtering process. The algorithm of the scheme is easy to implement, and is of high operability. The problem of time-frequency peak filtering window size selection is avoided. The method is suitable for de-noising complex signals.

A diverse wireless channel analysis platform based on antenna radiation directional diagram and a method thereof are disclosed; a transmitting antenna and a receiving antenna are respectively fixed at certain positions in the space and transmits and receives data through different radiation directional diagram of the antenna, the diversity of the antenna radiation directional diagram is used as a sampling space of the wireless transmission channel response on the space domain, and simultaneously high precision parameter estimation algorithm is used for obtaining detailed features of the wireless transmission channel in the directions of incident and exit through a manner of array signal processing, and conclusion and model construction are carried out on the feature of the wireless transmission channel by combining the feature estimation results of the channel on the time domain and time delay domain. The invention eliminates the fuzzy judgment problem of time and space of the traditional channel analysis method and improves the preciseness of channel analysis.

The invention discloses a ginseng-medlar solid beverage and in particular relates to a ginseng-medlar solid beverage taking Chinese herbal medicines comprising ginseng and medlar as main raw materials. The invention aims at solving the technical problems of time waste caused by long-time decoction in a current common Chinese herbal medicine taking manner and narrow applicable ranges of tablets, particles, capsules which are produced by extraction process by using traditional Chinese medicine extracts as main components. The ginseng-medlar solid beverage is prepared by the following raw materials in parts by weight: 200-300 parts of ginseng, 1,400-1,600 parts of medlar, 500-600 parts of jujube, 800-900 parts of raspberry, 800-900 parts of mulberry and 900-1,100 parts of sealwort. According to the technical scheme of the ginseng-medlar solid beverage, modern processes such as vacuum concentration and centrifugal separation are adopted; the quality of product is comprehensively improved by improving nutrition, taste and absorption; the ginseng-medlar solid beverage has the effects of improving qi and blood, building fitness, resisting fatigue, enhancing immunity and delaying senescence.

The invention relates to a method for performing difference AVO (amplitude versus offset) analysis by utilizing time-lapse seismic exploration data. A four-directional difference AVO expression is deduced from an approximate elastic modulus simplified formula (Bortfeld, 1961) of a Zoeppritz equation. The physical significance of difference between two time-lapse seismic AVOs is further clearly explained and the key problem of time-lapse seismic difference AVO analysis is solved. Analysis and reservoir prediction can be directly performed on amplitude difference between seismic data at two times by utilizing the expression. The difference AVO technology can be used for difference amplitude analysis of the time-lapse seismic (four-dimensional seismic) data. Changes in fluid, reflected by the difference amplitude can be fast identified. The saturation of the fluid can be further predicted.

The invention discloses a non-invasive intracardiac hyperexcitability point positioning method based on a stack type auto-encoder. The method mainly includes a training stage and a prediction stage. At the training stage, acquired QRS data serves as input, three-dimensional coordinates of corresponding mapping points of the QRS data serve as labels to train the auto-encoder, input data is preprocessed through the denoising auto-encoder, in the process of learning high-dimensional information, an upper layer of all variable factors is utilized, the result is more precise, and finally the stack type auto-encoder is established. At the prediction stage, an input data set x in a test set is input in a trained stack type model, and the final coordinate prediction result (x-y-z) is obtained on the output layer of the model. Position prediction of VT hyperexcitability points is achieved on the aspect of data drive, and the problems of time and labor waste of clinical catheter ablation is effectively solved.

The invention provides a microphone signal delay compensation control method based on echo cancellation. The method comprises the following steps: after conducting short-time data analysis on a microphone signal and a loudspeaker signal, relatively accurately calculating the time difference between the two signals, and then performing expansion and alignment operations on a buffering area to realize no time delay between the two digital signal sources. The microphone signal delay compensation control method based on echo cancellation effectively solves the problem that due to time delay between the microphone signal and the loudspeaker signal in a non-real-time system such as an Android system, an acoustic echo cancellation module cannot be used normally; and on the premise of not performing any bottom-driver modification on a system platform, the problem of time delay between the microphone signal and the loudspeaker signal is simply and effectively solved, so that the echo cancellation function can complete the same technical effect on an application software layer under Android as the way that the echo cancellation function is directly added to a bottom driver.

The invention discloses an ADS-B (automatic dependent surveillance broadcast) and radar combined system error estimation method, which belongs to the technical field of ADS and radar information fusion. At present, when the ADS-B equipment is used for radar calibration, the existing serious problem is that the time when the ADS-B emission equipment emits data information cannot be obtained, and no time alignment exists for the radar measuring data and the ADS-B data, so that the following error calibration is inaccurate, while all the conventional algorithms evade the problem. Aiming to effectively solve the problems of time alignment and error estimation of the radar system in the practical application, the method provided by the invention has the following steps of defining a novel ADS-B time system error based on the receiving time of the ADS-B, building the ADS-B and radar system error combined estimation model, and finally solving through the Least Squares algorithm, so that the radar can be accurately calibrated through the ADS-B.

The invention provides a quadrotor unmanned aerial vehicle attitude fault-tolerant control method based on an adaptive terminal sliding mode. The method comprises the steps that a quadrotor unmanned aerial vehicle is divided into a position subsystem and an attitude subsystem, and a corresponding mathematical model is established; the error function of the position subsystem is defined, and enabled to fly along a desired trajectory; then, in the case of the time-varying failure of the pitch angle theta of the attitude subsystem, a control law is designed by using the control method based on the adaptive terminal sliding mode; and the attitude angle error of the unmanned aerial vehicle is stabilized to zero to achieve adaptive fault tolerance. The quadrotor unmanned aerial vehicle fault-tolerant control method based on the adaptive terminal sliding mode, which is provided by the invention, can effectively solve the problem of time-varying fault in limited time, reduces the influence ofnoise, and is used in reconnaissance, rescue, cruise and other tasks.

The invention relates to an active disturbance observation-based fuel pressure control method, aims at solving the problems of time-varying characteristics and non-linearity of an internal combustion engine fuel injection system and non-ideal application of traditional PID (proportion integration differentiation) control in fuel pressure control and the like, and provides the method of realizing control on fuel pressure by adopting model-based feedforward control and state observation-based feedback control. The method mainly comprises target fuel pressure computation, fuel pressure sensor practical fuel pressure collection and computation, fuel measuring unit fuel volume flow rate feedback regulation amount computation, fuel measuring unit fuel volume flow rate feedforward control amount computation, conversion of fuel measuring unit fuel volume flow rate into current, conversion of fuel measuring unit current into a PWM (Pulse Width Modulation) duty ratio, fuel measuring unit practical work current measurement and computation, a fuel measuring unit current feedback regulator, fuel measuring unit PWM modulation frequency computation, a fuel measuring unit PWM drive, a fuel measuring unit, a fuel injection system and a fuel pressure active disturbance observer.

The invention relates to a micro-wave bidirectional transmission device for multi-base-station time synchronization. The micro-wave bidirectional transmission device comprises an atomic clock A, a clock generator A, a modulator A, an upper frequency converter A, a duplexer A, an antenna A, a lower frequency converter A, and a demodulator A; an atomic clock B, a clock generator B, a modulator B, an upper frequency converter B, a duplexer B, an antenna B, a lower frequency converter B and a demodulator B. The time information bidirectional transmission is adopted in the transmission device, so that the route delay is cancelled out, the time synchronization precision is improved, and the problem of time synchronization between the base station where the optical fiber link cannot be laid and the mobile base station is solved; the microwave bidirectional time transfer has broad frequency bandwidth, large volume, small natural interference and adjacent station interference and low error code rate; and furthermore, a narrow-beam directional antenna with high confidentiality can be adopted in the transmission device.

The embodiment of the invention discloses a video coding/decoding method and a device as well as a video playing method, a device and a system, which relate to the technical field of communication. The invention is invented for solving the problem of time delay generated between a program watched by users and a program played at real time in the same direct broadcast channel in the prior art as the access moment of the users is different, the current access frame is not an I frame, and a flow medium server always begins to transmit data to the users according to the I frame which is proximateto the current access frame of the users in a buffer area so as to cause different programs watched by the users accessing at the same time and different moment. The embodiment of the invention provides a video coding method. The method comprises the following steps: carrying out interframe coding on a source image to obtain a P frame by a coder; carrying out intraframe coding on the source imageand obtaining an I frame corresponding to the P frame; and storing the I frame corresponding to the P frame in a buffer memory of the coder. By the invention, the accessed users can watch live programs at real time.

The invention discloses a service dual-active implementation method and system of a big data platform. The method comprises that a Hadoop cluster massive file processing cluster obtains and stores source files and preprocesses source data in the source files; a first cluster processes the data, thus obtaining data processing results and carries out node blocking to the data processing results; related data of the data processing results in the first cluster is synchronized to a second cluster by a synchronization tool; the first cluster and the second cluster are equipped with same numbers of nodes; and node-to-node increment synchronization is carried out between the first cluster and the second cluster by binary data. According to the MPP database architecture based on column storage provided by the invention, the node-to-node increment synchronization is carried out between the homogeneous clusters by the binary data; through transmission of compressed increment file blocks, the batch inquiry is separated; moreover, the online inquiry timeliness is ensured; and the problems of time and resource conflicts between batch processing and online real time inquiry are solved.

The invention relates to a generation method of an LTE (Long Term Evolution) system upstream reference signal q-step ZC (Zadoff-Chu) sequence and a system thereof. The method comprises the steps of: firstly, acquiring the length of a ZC sequence according to the number of resource blocks; secondly, calculating a q value according to the length of the ZC sequence, a sequence number and a group number; and thirdly, generating the q-step ZC sequence by a recurrence method. In the invention, the problem of longer calculation time for calculating the maximum prime number is avoided by generating a ZC sequence length lookup table; since the ZC sequence is generated through recursion by skillfully using phase characteristics, the multiplication and division with large amplitude and poor precision during direct calculation of phases are avoided, and the invention has important meaning in practical realization of fixed points; the ZC sequence is generated by the recursion algorithm, and the problem of long calculation time caused by calculating trigonometric function many times during generating the ZC sequence directly by a formula is avoided.

The invention provides a method for adjusting the time delays of multiple broadband receiving signals. The method may solve a problem of time alignment of broadband signal baseband waveforms under to a large time-delay condition. The method is implemented by a technical scheme comprising: decomposing a time delay difference into a coarse grade and a fine grade and performing coarse-fine time delay difference adjustment on a baseband signal subjected to digital down-conversion and an AD sampling signal subjected to analog-to-digital conversion; sending a radiofrequency input signal and a radiofrequency sampling clock which are subjected to analog-to-digital conversion to a serial-parallel conversion ISerdes module to be converted into D parallel low-speed digital signals; obtaining 3*D pieces of data and D pieces of parallel data of a signal sequence by means of the delay of a fine time delay adjusting module; converting the data in to a digital signal by means of multiphase filtering summation of a multiphase down-conversion filtering extraction module; outputting a signal subjected to time delay adjustment of a first antenna, a second antenna, or an array element, decomposing the signal by a time delay decomposing module into the number of time delay periods controlling two coarse time delay adjusting modules and two fine time delay adjusting modules, adjusting the time delay difference of the broadband signals received by a compensation antenna or array element, and aligning the baseband waveforms of the multiple broadband receiving signals in a time domain.