155results about How to "Guaranteed no distortion" patented technology

The invention discloses a deforming statistical map based multi-view spatio-temporal data visualization method and application. Spatio-temporal data having geography and time attributes is visualized by adopting a method of multi-view and multi-tag mixed layout formed by combining a traditional map, a statistical map, time axis and a pie chart, a bar graph, a bubble chart and a Nightingale rose diagram in a statistical chart, and the dissymmetry problem of data distribution and space utilization of a traditional map visualization method and the problem that the attributes of multi-dimensional data display are not comprehensively displayed are avoided. A user can be helped to understand all the aspects of data from multiple perspectives, meanwhile a classic visualized statistic analysis chart, the map time axis and the like are combined, so that data display is specific and vivid. The deforming statistical map based multi-view spatio-temporal data visualization method can be applied to the fields of data visualization of microblogs, WeChat, demographic statistics, infectious disease distribution, elector distribution and the like, and visualization and visual analysis conducted on the data having the time relation of spatial distribution are achieved.

Provided is a steady motion visual evoked potential brain computer interface method based on stochastic resonance enhancement. First, an electrode is arranged on the head of a user, a detected electroencephalogram signal is sent to a computer, then movement stimulating units are presented in front of the user through a computer screen at the same time, the movement stimulating units are shielded by two-dimensional noise points obeying Gaussian distribution, the noise point update frequency is synchronized with the screen refresh rate, and the noise strength is represented by Gaussian distribution standard deviation. After the movement stimulating units are formed, the user watches any one of the movement stimulating units, a computer acquires a stimulation starting flag bit and a stimulation finishing flag bit, a computer signal is acquired through a test electrode, the significance probabilities of different stimulation targets are calculated, the targets are judged and indicated through the screen, and then the next target identification is conducted. The steady motion visual evoked potential brain computer interface method based on stochastic resonance enhancement can remarkably enhance brain response strength of the user, improve precision and efficiency of an existing brain computer interface, and innovatively improve practical level of the brain computer interface technology.

The invention provides an information processing method and electronic equipment. The electronic equipment is provided with a display unit. The information processing method comprises the steps that when a source image or a selection frame are displayed on a display unit, the source image is zoomed; a target image is obtained after the source image is zoomed, wherein the length of one set of edges of the target image is not larger than that of the corresponding edge of the selection frame, and the blank area not occupied by the target image exists in the selection frame; according to preset rules, pixel groups in the preset range of the source image are sampled, and N pixel points are extracted as sample pixel points, wherein N is an integer larger than or equal to 1; the N sample pixel points are analyzed, and filling image blocks are formed based on the analysis result; the blank area is filled with the filling image blocks.

The invention discloses a high-gain narrowband radio frequency receiver. The high-gain narrowband radio frequency receiver includes a radio frequency front-end amplification and filtering circuit, a frequency mixing circuit, a multistage numerical control gain amplification circuit, a first-stage intermediate frequency filter, an N-stage intermediate frequency filter, an ADC matching network and an ADC; the radio frequency front-end amplification and filtering circuit is used for amplifying and filtering radio signals and inputting the amplified and filtered radio signals to the frequency mixing circuit; the frequency mixing circuit is used for performing frequency conversion on the radio frequency signals to obtain intermediate-frequency signals and outputting the intermediate-frequency signals to the first-stage intermediate frequency filter; the first-stage intermediate frequency filter is used for filtering the signals and sending the filtered signals to the multistage numerical control gain amplification circuit; the multistage numerical control gain amplification circuit is used for amplifying the signals and sending the amplified signals to the N-stage intermediate frequency filter; the N-stage intermediate frequency filter is used for filtering the signals and sending the filtered signals to the ADC matching network; and the ADC is used for converting signals outputted by the ADC matching network into digital signals. With the high-gain narrowband radio frequency receiver of the invention adopted, under a condition that blocking signals exist, a high-gain link can maintain unsaturated, sensitivity will not be deteriorated, and gain can be as high as 80db.

The invention provides a system and a method for automatically adjusting smoothness of a projection surface. The system is characterized in that the system comprises a storage unit for storing a standard corrected image; and a control unit which reads the standard corrected image from the storage unit and projects the standard corrected image on a random projection surface through a projection unit; the method comprises the steps of acquiring the corrected projection image of the standard corrected image on the projection surface through an image sensing unit; correcting the corrected projection image so that the corrected projection image is similar with the standard corrected image, thereby obtaining a correction parameter; correcting the to-be-projected image according to the correction parameter; and projecting the corrected image on the projection surface through the projection unit. The other technical solution of the invention provides a projection surface evenness automatic adjustment method based on the system. The system and the method provided by the invention can realize no distortion of the image which is projected out of the projection system without the projection surface.

The invention relates to an electronic PTZ method and device based on high-definition digital camera monitoring. High-definition digital video streaming is obtained and then decoded so as to obtain a high-definition digital video streaming frame image, then the high-definition digital video streaming frame image is subjected to electronic PTZ control so as to obtain the frame image in a reserved active window, namely the traditional PTZ holder control method is applied to image processing, large-scale scene video signal streaming can be obtained as long as the image obtained is large enough and has enough resolution, at the same time, the reserved small scene in the large-scale scene image can be selected and amplified to have reserved resolution for display so as to ensure the small scene to be distortionless, and large scene and small scene at any time can be obtained simultaneously through conducting PTZ processing on the obtained high-definition digital image information.

The invention relates to an intelligent inspection system and method for a power distribution room, and the system comprises a label module which carries corresponding power distribution cabinet equipment information; an identification uploading module which is used for identifying the label module, reading the inspection content information of the corresponding power distribution cabinet, acquiring inspection point position information, receiving inspection record information input by an inspector, and uploading the inspection point position information, the inspection content information andthe corresponding inspection record information to a background processing module; and the background processing module which is used for generating an inspection report, updating the inspection report in real time and storing the inspection report. According to the invention, the label module arranged on the power distribution cabinet is identified to obtain the power distribution cabinet equipment information, and the power distribution cabinet equipment information is correlated with the inspection record information inputted by the inspector and the automatically obtained inspection pointposition information, and then is uploaded to generate an inspection report, thereby achieving the intelligent management and recording of inspection, facilitating the real-time obtaining of the state of the on-site power distribution cabinet by a background, greatly improving the inspection efficiency, facilitating the subsequent query and retrieval at any time, and bringing great convenience.

The present invention provides a beam direction switching method and device based on a microphone array, and the method comprises the steps: determining phase delay information between microphones inthe microphone array; acquiring sound source signals collected by all microphones in the microphone array; performing beam forming of the sound source signals collected by the microphones to obtain output signals of the microphone array in the preset all beam directions; determining a target beam direction from the fixed beam directions according to the energy values of the output signals of the microphone array in the fixed beam directions; switching the beam direction of the microphone array to the target beam direction. The method can select an optimal beam direction from the preset fixed beam directions according to the position of a user, can enable the determined beam direction to adapt to the mobility of the user, and improves the applicability of the method.

Present invention relates to digital power control method for enhancing data rate GSM evolution scheme (EDGE) carrier frequency. Said method adopts digital open /closed loop combined power combined power controlling means, adopting open-loop control output mode in single time slot, ensuring non distortion signal to 8PSK output power in one time slot, adopting closed-loop control output mode to multi - same power class time slot in same modulation mode, Said invention can adapt GMSK and 8PSK modulation mode with high carrier frequency output power and anti disturbance ability and stability.

The embodiment of the invention provides a noise reduction method and device, electronic equipment and a readable storage medium, and the method and device can be applied to the electronic equipment.The electronic equipment comprises a first sound collector and a second sound collector, and the installation positions of the first sound collector and the second sound collector are different; the method comprises the following steps of: based on a first sound signal collected by a first sound collector and a second sound signal collected by a second sound collector, determining an expected sound signal and an interference sound signal, performing coherent noise elimination processing on the expected sound signal based on the interference sound signal to obtain a third sound signal, and performing non-coherent noise suppression processing on the third sound signal according to the probability that voice exists in the third sound signal to obtain a target sound signal. The embodiment of the invention not only can effectively reduce the noise in the target sound signal, but also can effectively ensure that the voice in the target sound signal is not distorted.

The invention relates to a frequency scanning method for a time division-synchronization code division multiple access (TD-SCDMA) system, which belongs to the technical field of telecommunication. The method is characterized by comprising the following steps of: firstly, determining a frequency scanning step length and the reference power and initial gain of automatic gain control; secondly, starting the initial gain from any moment; thirdly, forming a characteristic window, and determining the position of a downlink pilot time slot; fourthly, judging whether the position is switched to a next frequency point according to the step length; and finally, acquiring a main carrier frequency and a main carrier wave according to the power value of the recorded downlink pilot time slot. The main carrier frequency is determined rapidly in a sliding window way, so that hardware storage cost is reduced, and the disturbance of an auxiliary carrier wave on a frequency scanning result is solved well. In the method, the automatic gain control is combined with dynamic adjustment of reference power, so that the distortion of the characteristic window is prevented, and the main carrier wave is determined accurately.

The embodiment of the invention discloses a method and device for reducing PAPR based on a distortion-free initial phase sequence of a reserved symbol. According to the method, when target data is sent through OFDM, a part of reserved subcarriers are reserved in advance and specially used for bearing peak elimination signals, and after the peak elimination signals and the target data are loaded tothe subcarriers, the peak elimination signals and the target data are sent after OFDM modulation. According to the method, the peak elimination signals and the target data are borne on different subcarriers to be sent, it is guaranteed that the sent target signal is distortion-free, the stability of the signal transmission process is improved, the distortion-free target signals can be obtained only by removing the signals on the reserved subcarriers when the received signals are processed, and the implementation is easy. And on the other hand, according to the method, the initial phase is used as a peak elimination signal, another method for generating the peak elimination signal is provided, and the initial phase and other types of peak elimination signals can be superposed to obtain abetter peak elimination effect.