172results about How to "Reduce deletion" patented technology

This invention relates generally to the field of Magnetic Resonance Imaging (MRI) systems for generating diagnostic images of a patient's internal organs and more particularly, this invention relates to improved MRI systems with decreased interference between the magnetic field used for producing diagnostic images and the magnetic fields generated by the electric motors used for driving the pistons of the contrast media injectors. Additionally, the system employs an improved communication link between an externally located system controller and the injection head control unit located within the electromagnetic isolation barrier which defines the magnetic imaging room.

The invention discloses a moving object detection and tracking method. The method comprises the following steps: firstly, obtaining a frame image from a video sequence, converting the image into a gray scale image, and filtering and denoising are performed; then, the moving target region is obtained by using three-frame difference method, and the hole in the difference image is filled by morphological filter closure operation; the pixel points with non-zero gray value in the image after morphological filter closure operation are calculated by optical flow calculation, and the moving target isextracted; then the Kalman filtering algorithm is used to predict the centroid position of the moving object in the current frame image, the predicted value is compared with the centroid position tracked by a Camshift algorithm, and the centroid coordinates of the moving object are determined by the comparison results, and the size and position of the search window are determined when searching the next frame image; the model is updated to get the next frame image, the whole tracking process is repeated, and finally target tracking is achieved. The invention reduces the error of moving targetdetection and tracking, and improves the accuracy.

The invention relates to an urban traffic-oriented traffic index calculation method. The calculation method is defined by flow and a vehicle speed, and is based on commonly used microwave data and floating car data in urban traffic; and historical or real-time traffic indexes of a road network can be determined by adopting methods such as data fusion, statistical modeling and mathematical modeling. The urban traffic-oriented traffic index calculation method has the characteristics of high accuracy of calculation result, high adaptivity, low cost, high feasibility, simplicity and convenience of calculation process, low time complexity and high operation speed.

The invention discloses a color image edge detection method based on a quaternion theory and a canny algorithm, and belongs to the field of image processing and computer vision. The method comprises the steps that 1) an original color image is represented by a quaternion; 2) smooth filtering is carried out on the color image; 3) a color quaternion edge characteristic matrix is built and used for analyzing the edge characteristics and the structural characteristics of the color image; 4) non-maximum value restraining is carried out on the gradient magnitude of the image obtained at the step 3); 5) dual threshold method detection and edge connection are carried out. The algebraic operation and the spatial characteristic of the quaternion are utilized, all the pixel points of the color image are represented by the pure quaternion, the color quaternion edge characteristic matrix is built and used for analyzing the edge characteristics and the structural characteristics of the color image, edge neighbourhood brightness hopping and color hopping are fused, color information missing in a traditional algorithm is avoided, the introduction of noise is reduced, and locating precision and anti-noise performance are improved.

The invention discloses a power bank leasing system and leasing method. The system comprises a server, a mobile terminal and a power bank, wherein the power bank is in Bluetooth connection with the mobile terminal, the mobile terminal is in network connection with the server, the power bank includes a close-range wireless communication module, a charging module, a unique identifier and a microprocessor. The logic lock control of the output end of the power bank is realized through Bluetooth or NB-IoT in the power bank, so that the deployment of the power bank can be closer to the use scene ofa user. The power bank leasing system and leasing method have the advantages of low cost and high utilization, and enable unattended leasing services. With the power bank leasing system and leasing method adopted, the user can borrow and return the power bank anytime and anywhere.

The invention relates to a method for superficially analyzing automatic document summarization on the consideration of conceptual abstract degree, pertains to the field of information retrieval and information science, and is characterized in that: first, a document is pre-treated and an abstract value is set; second, sentences in the document are represented by a conceptual vector model via polyseme disambiguation processing; third, the sentences are clustered into a plurality of clusters with similar subjects; forth, compression ratio of a summarization is determined according to the number of key words extracted from a collected works; fifth, the abstract degree of the sentences is determined; sixth, a plurality of abstract sentences required by the compression ratio is picked up from the clusters in sequence according to IMMRA value; and seventh, sequencing is carried out to the abstract sentences extracted and a summarization document is output. The beneficial results include: the automatic document summarization on consideration of abstract degree is realized and information redundancy and lack of the automatic summarization abstract due to conception inclusion relation are reduced; and the method can adjust the length of the abstract in a self-adaptation way according to the number of the subjects and adjust the induction degree of the summarization according to the needs of abstract degree of a user, thereby being characterized by good adaptability.

The embodiment of the invention discloses an anti-interference method for a laser radar and the anti-interference laser radar. The anti-interference method includes the steps that a transmitting control unit generates emitting laser information in each transmitting period according to a transmitting code word table; a laser transmitter transmits emitting laser light periodically according to the emitting laser information; a laser receiver receives reflected laser light, wherein the reflected laser light is the laser light after the emitting laser light is reflected by a measured object; a processor obtains effective laser pulses in the reflected laser light and discards interfering laser pulses according to the transmitting code word table. According to the embodiment, interference can beeffectively eliminated, and the safety performance and accuracy of the laser radar are improved.

The invention discloses a method and device for growth of nitride materials at low temperature through laser assistance. The method comprises the steps that precursor steam of a non-nitrogen element and active nitrogen precursor gas are conveyed to a substrate material at the temperature ranging from 250 DEG C to 800 DEG C in a reaction chamber; a laser beam with the wavelength equal to the length of active nitrogen molecular bond resonance waves is utilized for acting on active nitrogen gas to enable laser energy to be directly coupled to active nitrogen gas molecules; and breakage of NH keys is accelerated, sufficient active nitrogen is provided, the non-nitrogen element chemically react with the active nitrogen, the III group of nitrogen film coating materials are deposited, and sustained action is carried out until a sediment covers a whole substrate and reaches the needed thickness. The device comprises a vacuum reaction cavity, a gas pre-mixing cavity, a wavelength tunable laser device and a moving mechanism. On the basis of improvement in the active nitrogen utilization rate and reduction of the environmental pollution, large-area, rapid and high-quality growth of the nitrogen film coating materials under the low-temperature environment can be achieved.

The invention relates to a loop heat pipe structure, comprising evaporator and closed pipe. The evaporator comprises the evaporator body made of heat conducting material. At least two accommodating holes are set on the evaporator body and at least one channel hole through all accommodating holes are set on it. In addition, the closed pipe comprises a first pipe and at least a second pipe. Ends of the first and the second pipes are heating ends and are fixed in two accommodating holes of evaporator respectively. The other end is connecting end and ends are connected continuously to constitute the cycling loop. At the same time, liquid sealing zone with flat pipe inner diameter is formed between heating and connecting ends in the first pipe.

The invention discloses a character assembly-oriented graphic verification code identification method and device, and aims at providing the graphic verification code identification performance. The method comprises the following steps of: obtaining a to-be-identified graphic verification code which consists of characters, and preprocessing the graphic verification code; cutting the graphic verification code to obtain at least one graphic; determining the quantity of characters included in each cut graphic; for each cut graphic which includes one character, matching the graphic with a preset sample set, and identifying the character included in the graphic; for each cut graphic which includes more than one character, matching the graphic with the sample set by adoption of a bidirectional sliding and downward deviation combined matching method, and identifying the characters included in the graphic; and combining identification results of the characters included in all the graphics to obtain an identification result of the graphic verification code.

The present invention relates to a reconstructed low-frequency data frequency domain full-waveform inversion method based on a convolution idea and an accurate earthquake source. The method comprisesthe steps that: a reliable earthquake source function is inverted by employing direct wave components of observation data; low-frequency data of self-excited self-closing points is reconstructed basedon the convolution idea; and finally, the reconstructed data is applied to perform a low-frequency starting part of multi-scale full-waveform inversion to allow the inversion to have a good beginningand finally obtain a good result. The method provided by the invention effectively avoids occurrence of cycle skips, so that the inversion result is greatly improved, and minimum convergence of various errors is effectively recovered. An idea of a supergun of dynamic random coding is employed at the final inversion part, so that the efficiency of the full-waveform inversion is effectively improved. The reconstructed low-frequency information of the self-excited self-closing points are low-frequency information on the aspect of mathematics to provide large-scale disturbance for the full-waveform inversion, are real low-frequency information on the aspect of objective physics, and can be used for other data processing directions.

The present invention features modified Mycobacterium tuberculosis strains which lack a functional lspA gene, and vaccine formulations comprising the same. In many embodiments, a modified Mycobacterium tuberculosis strain of the invention comprises deletion or inactivation of the lspA gene and/or one or more non-lspA genes that are involved in Mycobacterium tuberculosis inhibition of macrophage responses to IFNγ. The present invention also features methods of using the modified Mycobacterium tuberculosis strains to treat or present Mycobacterium tuberculosis infection in mammals. In addition, the present invention features methods of using ΔlspA strains to identify non-lspA genes or other cellular components that are involved in Mycobacterium tuberculosis proinflammatory stimulation of macrophages or inhibition of macrophage responses to IFNγ.

The invention discloses an image description method based on intra-layer and inter-layer joint global representation, and relates to artificial intelligence. The method comprises: the step 1, extracting a plurality of candidate areas of a to-be-described image and features corresponding to the candidate areas by adopting a target detector; and the step 2, inputting the features extracted in the step 1 into the trained neural network so as to output a description result of the to-be-described image. By utilizing the characteristics of a Transformer structure and explicitly modeling intra-layer and inter-layer joint global features, the global features of pictures are effectively utilized, object missing and relation bias existing between image description tasks are reduced, and the accuracy and comprehensiveness of generated sentences are improved; the method has very strong mobility and can be suitable for any image description model based on a Transformer structure, and the model performance is improved; and the problems of target missing and relation offset of image description are solved, complex multi-modal reasoning is expanded, description is automatically generated, and the method can be applied to the fields of image retrieval, blind navigation, automatic generation of medical reports and early education.

Embodiments of the application provide a data processing method and device. The method comprises: receiving reported data reported at a current moment; determining a first moment when latest reported data is received before the current moment; according to a preset data reporting cycle, determining whether an absent data reporting moment exists within a time interval between the first moment and the current moment; when an absent data reporting moment exists within the time interval, according to the data reporting cycle, determining a second moment when reported data is absent within the time interval; and on the basis of the reported data reported at the current moment and the reported data received at the first moment, reconstructing and storing reported data corresponding to the second moment. The method and device can reduce the situations that reported data cannot be analyzed because the reported data is absent.

The invention discloses a fusion protein for improving gene editing efficiency and application thereof. The fusion protein comprises a single-stranded DNA binding protein functional domain, nucleoside deaminase and nuclease. According to CBEs, in the process of carrying out C-G to T-A base conversion, nucleoside deaminase such as cytosine deaminase takes single-stranded DNA as a substrate to carry out deamination, and a single-stranded DNA binding protein functional domain is fused on fusion protein of nucleoside deaminase and nuclease, so that the opportunity that the single-stranded DNA is exposed to nucleoside deaminase is greatly increased, and the base editing efficiency is obviously improved. The single-base gene editing technology is improved in a breakthrough manner, and the application of the fusion protein in the aspects of gene editing, gene therapy, cell therapy, animal model manufacturing, crop genetic breeding and the like can be greatly promoted.

A push-broom LiDAR-based soil surface morphology monitoring device disclosed by the present invention comprises a push-broom laser ranging radar, a radar carrying platform and a data processing center. The radar carrying platform is used to drive the push-broom laser ranging radar to advance along the X-axis and Y-axis directions, the push-broom laser ranging radar comprises a radar main body anda laser ranging module, and the data processing center is used to control the motion of the radar carrying platform and the motion of a driving motor, receive and process the data of the push-broom laser ranging radar. The present invention also discloses a soil surface morphology monitoring and data analysis method based on the device. The device and the method of the present invention can capture the three dimensional morphology structure of a soil surface fine, at the same time, can avoid the interference of the external light, and are more accurate in measurement result. Meanwhile, the push-broom spatial motion can effectively reduce the soil surface information missing problems caused by the shading, such as the soil surface fluctuation, the irregular cracks, etc., and compared with afixed scanning unit, the more complete soil surface information can be obtained.

The invention discloses a data processing method and device, equipment and a medium. The data processing method comprises the following steps: receiving target activation data and a target activationinstruction sent by a target server; wherein the target activation data comprises a to-be-activated payment mark corresponding to a to-be-activated payment card account; in response to the target activation instruction, updating a target payment mark in the target personalized data into a to-be-activated payment mark; wherein the transaction card type to which the target personalized data belongsis the same as the transaction card type to which the target activation instruction belongs; and setting the updated target payment mark to be in an activated state. According to the embodiment of theinvention, the problem that errors are easy to generate in the process of setting the default payment card can be solved.