686results about How to "Low resolution" patented technology

A component includes a plurality of electrical connections on a process side opposed to a back side of the component. Each electrical connection includes an electrically conductive multi-layer connection post protruding from the process side. A printed structure includes a destination substrate and one or more components. The destination substrate has two or more electrical contacts and each connection post is in contact with, extends into, or extends through an electrical contact of the destination substrate to electrically connect the electrical contacts to the connection posts. The connection posts or electrical contacts are deformed. Two or more connection posts can be electrically connected to a common electrical contact.

An e-Petri dish comprising a transparent layer having a specimen surface and a light detector configured to sample a sequence of sub-pixel shifted projection images of a specimen located on the specimen surface. The sub-pixel shifted projection images associated with light from a plurality of illumination angles provided by an illumination source.

Techniques for imaging a search region to detect a dielectric target include placing multiple electrodes outside the search region. At least two electrodes are activated independently of each other. Emitter circuits are connected to corresponding emitter electrodes. Each emitter circuit is configured for using its emitter electrode to produce an electric field with wavelength longer than about one hundred meters. Receiver circuits are connected to corresponding receiver electrodes. Each receiver circuit is configured for using its receiver electrode to measure a property of an electric field produced, at least in part, by an emitter electrode. A processor determines a property of a dielectric target inside the search region based on measurements from the receiver circuits using a subset of the emitter circuits. Among other uses, these techniques allow humans to be detected inside building-size regions, even when hidden by visually opaque blocking material of small dielectric constant.

The invention, which relates to the stereoscopic vision field, discloses a depth image acquisition method based on combination stereo matching and structured light. With the method, a problem of stereo matching realization at an image weak texture region under insufficient image exposure can be solved. When external environmental light is sufficient and no weak texture region exists in a shooting scene, depth information of a three-dimensional scene is obtained by using an image shot under natural light directly; and when a little texture information is collected or the external environmental light is weak during the collection process, a coded structured light is projected actively, thereby enhancing the structured light intensity and object texture information. Because the structured light is processed by scene regulation while the scene texture information is enhanced, the scene depth information can be obtained by using a structured light measuring method directly. The depth image acquisition method is suitable for obtaining the object depth information accurately.

The invention provides a target detection method based on SSD improvement, and the method selects ResNet-101 to replace VGG-16 as a basic network of a whole model, and provides richer feature map information. A feature fusion strategy is adopted, so that the detection effect of multi-scale prediction of a network prediction layer on a small target is improved to a certain extent; an SE-block module is added to a classification branch and used for capturing global environment information of the feature map and outputting the feature map with channel weight, so that classification is more accurate; and a Centerness parallel to the classification prediction layer is added to suppress a low-quality bounding box so as to improve the detection precision. According to the method, anchor-frame-free detection is adopted, all hyper-parameters related to the anchor frame are avoided, the hyper-parameter amount is greatly reduced through the adopted prediction bounding box strategy, the network design complexity is reduced, and the training stage becomes very simple. According to the method, a loss function adopts a focalloss function, so that the model detection precision is improved while the detection speed is kept.

A JPEG2000 compressed image is transcoded to a lower bit-rate or lower resolution, or both, without having to decompress the initial JPEG2000 image and then recompress it to a lower bit-rate and / or resolution. Instead, arithmetic decoding is performed only to the nearest higher bit-rate layer, up to the desired resolution, before performing rate-distortion optimization to produce the transcoded image.

The invention discloses a preparation method of ganoderma lucidum polysaccharide with high yield, which comprises the following steps: firstly, crushing ganoderma lucidum fruiting bodies into ganoderma lucidum powder, then sequentially extracting the ganoderma lucidum powder by adopting a microwave-assisted hot water extraction method and an ultrasonic-assisted hot water extraction method, and carrying out concentration, impurity removal, concentration, alcohol precipitation and drying on the obtained extracting solution to obtain water-soluble ganoderma lucidum polysaccharide; and extracting the ganoderma lucidum residues by adopting an alkali extraction method, and carrying out neutralization, dialysis, concentration, impurity removal, alcohol precipitation and drying on the obtained extracting solution to obtain alkali-soluble ganoderma lucidum polysaccharide. The method is used for extracting the ganoderma lucidum polysaccharide by combining microwave heating action and ultrasonic cavitation and extracting the alkali-soluble polysaccharide in the ganoderma lucidum by utilizing the alkali extraction method, thereby reducing the loss of the ganoderma lucidum polysaccharide; and the prepared ganoderma lucidum polysaccharide has the characteristics of high production yield, strong immunological activity and the like.

The invention provides a preparation method for an Al2O3 hollow sphere / aluminum porous composite material, relates to a preparation method for an aluminum-based porous composite material, which solves the problems that the strength of a traditional foam aluminum material is low, the process conditions are harsh and the cost is high in an existing preparation method. The preparation method 1 comprises the following steps: step 1. filling an Al2O3 hollow sphere; step 2. pre-heating; step 3. pouring; step 4. pressurizing and immersing; and step 5. maintaining pressure, cooling and carrying out de-molding to obtain the Al2O3 hollow sphere / aluminum porous composite material. The preparation method 2 comprises the following steps: step 1. mixing the Al2O3 hollow spheres with different grain diameters and filling; step 2. pre-heating; step 3. pouring; step 4. pressurizing and immersing; and step 5. maintaining pressure, cooling and de-molding to obtain the Al2O3 hollow sphere / aluminum porous composite material. The Al2O3 hollow sphere / aluminum porous composite material is prepared by immersing aluminum or aluminum alloy into a gap between Al2O3 hollow ball prefabricated blocks; porous structure characterizes of the Al2O3 hollow spheres are maintained and a strengthening mechanism of the aluminum-based composite material is introduced, so that the mechanical properties of materials are improved. According to the preparation method, the operation is convenient, the cost is low, the process is simple, and the production cost is reduced.

The invention discloses a method for calculating the thickness and the weight of ice coating on an overhead transmission line of a tangent tower. The method comprises the following steps of: 1, calculating basic mechanic parameters of a wire at ice coating temperature but without ice coating in a vertical plane according to the design parameters; 2, calculating height difference angle in a wind deviation plane, wire horizontal stress, wire deadweight ratio load in a vertical direction, horizontal span and wire length from the lowest point of a wire of big and small side towers to a main tower according to the wind deviation angle of an isolator string measured by a sensor; and 3, establishing a relation expression between the tilt angle of the isolator string in the wind deviation plane and the wind deviation angle of the isolator string in the wind deviation plane and the tilt angle of the isolator string in the vertical plane, and establishing an equation of load balance in the vertical direction after the ice coating in the wind deviation plane, and calculating the thickness and weight of equivalent ice coating of the wire. The method has the advantages of reducing the equipment quantity, and improving the calculation precision and the accuracy and the reliability of the calculation result.

A printable component structure includes a chiplet having a semiconductor structure with a top side and a bottom side, one or more top electrical contacts on the top side of the semiconductor structure, and one or more bottom electrical contacts on the bottom side of the semiconductor structure. One or more electrically conductive spikes are in electrical contact with the one or more top electrical contacts. Each spike protrudes from the top side of the semiconductor structure or a layer in contact with the top side of the semiconductor structure.

Disclosed is a video transcoding apparatus converting a specific bit rate of an MPEG (moving pictures experts group) bit stream into a different rate thereof for transportation. The present invention includes a video pre-processing unit having a predetermined matrix structure and down-sampling a macro block decoded by the video decoder by transforming the macro block into a corresponding picture structure to the compressed video bit stream, a transcoding parameter control unit detecting information about a picture from a previous bit stream variable-length-decoded by the video decoder and setting up an encoding mode for a transcoding in accordance with the detected information, etc. Therefore, the present invention does not need the motion estimation unit of encoder and reduce the complexity of the bit allocation unit. When changing HD-rated MPEG sequence over 10 Mbps into NTSC-rated MPEG sequence below 6 Mbps, the present invention reduces calculation time and complexity of hardware.

The invention discloses a data quality monitoring method for a local enhancing system, which mainly solves the problem that the satellite orbit position calculation accuracy by the traditional data quality monitoring method is relatively low. The method comprises the following steps of: firstly, checking the data integrity and validity of a received broadcast ephemeris to acquire a group of accurate and valid ephemeris data; secondly, checking the consistency of the group of ephemeris data; thirdly, carrying out real-time precision ephemeris detection, new and old ephemeris detection and ephemeris-almanac detection on the broadcast ephemeris data with uniformity respectively; and finally, according to the data availability detection result, generating an available matrix and an available broadcast ephemeris group of the broadcast ephemeris. The method has the advantages of high satellite orbit position calculation accuracy and low ephemeris fault error detection probability and can effectively solve the problem of man-made interference on the broadcast ephemeris and almanac of a satellite navigation system.

The invention discloses a bullet screen display method, a bullet screen adding method, a bullet screen display apparatus and a bullet screen display system, and belongs to the field of online video playing. The bullet screen display method comprises the steps of: acquiring a first type of bullet screens which corresponds to an online video and are added by network medias and a second type of bullet screens added by audiences of the online video; determining an audience client for playing the online video; and sending the first type of bullet screens and the second type of bullet screens to the audience client, and carrying out visual highlighting display on the first type of bullet screens relative to the second type of bullet screens, wherein the audience client is used for displaying the first type of bullet screens and the second type of bullet screens in the process of playing the online video. Effects of partitioning users into the network medias and the audiences, carrying out highlighting display on bullet screens sent by the network medias, enabling the bullet screens sent by the network medias to be more obvious than common bullet screens sent by the audiences on the aspect of the visual effect and improving the distinguishing degree of bullet screens sent by important users are achieved.

The embodiment of the invention discloses a blood vessel segmentation method and device, an electronic device and a storage medium. The method comprises the following steps of respectively inputting an image to be segmented into at least two pre-trained set neural network models, and generating an initial segmentation result corresponding to each set neural network model; carrying out weighting processing on each initial segmentation result by utilizing a target model weight value corresponding to each set neural network model to generate a weighted segmentation result, the target model weightvalue being determined when the set neural network model is trained; and carrying out image post-processing on the weighted segmentation result to generate a segmented blood vessel image. According to the technical scheme, the Boosting modeling idea is applied to the field of blood vessel segmentation for the first time, the problem that a blood vessel segmentation result obtained through a single neural network model is low in precision is solved, and the effect of improving the blood vessel segmentation precision is achieved.

The invention discloses an energy consumption balancing method in a wireless ultraviolet light cooperative unmanned aerial vehicle formation network. An ultraviolet light non-line-of-sight single scatter communication model is established; an energy attenuation formula of channels in an ultraviolet NLOS(c) class communication mode is determined; and on the basis, energy consumption analysis is carried out on unmanned aerial vehicle formation in flight through adoption of a wireless ultraviolet light communication energy consumption model. Through circulation of three phases of cluster head selection, cluster establishment and stable data transmission, clustering management is carried out on the unmanned aerial vehicle formation, so a purpose of balancing network energy consumption is achieved. According to the method provided by the invention, through combination of the advantages of wireless ultraviolet light scatter communication, the energy consumption balancing is carried out on the unmanned aerial vehicle formation based on a clustering topology management mechanism, energy allocation of the unmanned aerial vehicle formation can be effectively optimized, and survival time of the unmanned aerial vehicle formation is prolonged.

The invention provides an outdoor large-scale scene three-dimensional mapping method fusing multiple sensors. The implementation process is divided into two modules, namely a visual inertia odometer module, and a laser odometer and mapping module. The visual inertia odometer module comprises optical flow tracking, IMU pre-integration, initialization, sliding window optimization, marginalization and word bag model establishment. The laser odometer and mapping module comprises point cloud segmentation, point cloud distortion removal, feature extraction and inter-frame matching, loopback detection and mapping. Compared with a single radar mapping scheme, the high-frequency pose of the visual inertia odometer is fused, and the method has the advantages of being good in point cloud distortion removal effect, high in loopback detection precision and high in mapping precision. The problem that an outdoor large-scene three-dimensional map is low in precision is solved, and a breakthrough is provided for further development of unmanned driving.

The present invention provides water soluble chitosan microspheres which can be used for loading drug and a preparation method thereof. The structure of the microsphere is that the outside of crosslinking state water soluble chitosan core which can load the drug is orderly enwrapped with a crosslinking state water soluble chitosan coating layer and a crosslinking solidified outer surface layer, which can be used for loading and controlling releasing the drug. The preparation method is that the drug which is mixed with the water soluble chitosan and corresponding water dispersion and oil component are used to form W / O type mixture which is reacted with twain-aldehyde crosslinking agent to obtain microsphere core; water soluble chitosan solution is used to form crosslinking state coating layar at the outer side of the microsphere core; finally, the crosslinking solidified outer surface layer is formed through the second crosslinking reaction. The chitosan microsphere for loading the drug has controllable particle size distribution and slow-release effect, obviously improved intensity and good biological compatibility and biological adhesion, which enlarges the application range for loading drug and has good effect of drug loading, controlling and releasing; the chitosan microsphere for loading the drug can be applied to a plurality of medication forms, such as hypodermic, intravenous and intraperitoneal injection medications, orally taking, etc., the preparation method is simple and feasible with mild condition and low production cost.

The invention relates to the field of rock fracture prediction, in particular to a shale hydraulic fracture propagation prediction method. The method comprises the steps that 1, the normal direction,tangential stress and effect stress of an inclined fracture under the action of the external stress and water pressure are calculated; 2, a strain energy density function is obtained according to thetype of the fracture; 3, a strain energy density factor is obtained according to the strain energy density function; 4, the propagation direction and propagation angle of the fracture are judged according to a strain energy density criterion; 5, influences of stratification, natural fractures and the like on the propagation direction of hydraulic fractures are obtained through numerical simulation, so that fracture propagation under the effect of shale hydraulic pressure is predicted. The prediction method is based on fracture mechanics, a hydraulic condition factor is introduced, and the influences of different stratification directions on the propagation direction of the shale hydraulic fractures are obtained by researching the relation between the fracture propagation direction and themagnitude of the hydraulic pressure and utilizing an extended finite element method, so that accurate prediction of hydraulic fracture propagation is achieved, and higher prediction accuracy is obtained.

The invention relates to the field of artificial intelligence, and discloses a medical knowledge graph construction method and a device, equipment and a storage medium. According to the method, a knowledge feature extraction mode is determined on the basis of a collected data source to analyze medical data in a targeted mode, so that accurate entity names are obtained, entities with different entity names but the same ontology are fused through a fusion algorithm, the entities are unified, and finally a knowledge graph is constructed on the basis of the fused entities. Therefore, the problem of low knowledge graph precision caused by non-uniform related medical knowledge entities is solved, powerful support and guarantee are provided for diagnosis means and methods in the medical field, and knowledge sharing and management can be completed more reasonably and efficiently. In addition, the invention also relates to a blockchain technology, and the medical knowledge graph and the entitycan be stored in the blockchain.

The invention discloses a control system, method and device for the exhaust temperature of a compressor. The control system comprises a temperature sensor, a controller and an electronic expansion valve, wherein the temperature sensor is arranged on an exhaust channel of an exhaust outlet of the compressor and used for collecting the current exhaust temperature of the compressor; the controller is connected with the temperature sensor and used for determining an adjusting parameter of the target opening degree of the electronic expansion valve on the basis of the current exhaust temperature and generating a control signal where the adjusting parameter is recorded; and the electronic expansion valve is connected with the controller, installed on a liquid spraying channel of the compressor and used for adjusting the opening degree to the target opening degree according to the adjusting parameter under triggering of the control signal. By means of the control system, method and device for the exhaust temperature of the compressor, the technical problem that in the prior art, precision for adjusting the exhaust temperature of the compressor is low is solved.

The invention discloses a zero-force control method of a mechanical arm facing the direct demonstration. The zero-force control method of the mechanical arm facing the direct demonstration comprises the steps of S1, building an n-degree-of-freedom mechanical arm dynamic model with n flexible joints; S2, building a controller of the mechanical arm, wherein the controller is used for carrying out gravity compensation and reducing the influences of an inertia force and a friction force on the flexible joints; and S3, identifying a gravity term in the controller. According to the control method provided by the invention, not only can the gravity of the mechanical arm be compensated, but also the influences of inertia forces and friction forces of the joints can be reduced, and the method is simple, less in calculation amount, and convenient to implement.

A vehicle lighting device includes a projector lens, a lens holder, a main body barrel, a bottom cover, a first to a fourth excitation light sources, an upper and a lower light deflector, a correction mirror, and a fluorescent unit. The first and the second excitation light source emit laser beams toward the rotational center of a light-deflecting mirror of the upper light deflector, and the third and the fourth excitation light source emit laser beams toward that of the lower light deflector. The correction mirror corrects the distortion of the laser beams scanned by the upper and lower light deflectors and reflects the corrected laser beams. A two-dimensional image corresponding to a predetermined light distribution pattern is drawn as a white image on the fluorescent unit by the corrected light beams, and the two-dimensional image is projected on a virtual vertical screen through the projector lens.

The invention discloses a method for preparing ultrafine cemented carbide by taking nano WC-6Co composite powder added with Co powder as raw materials. According to the method, by taking the nano WC-6Co composite powder as the raw materials, the Co powder, inhibitors and paraffin are added to the raw materials; through alcohol wet grinding and spray granulation, cemented carbide mixtures of whichthe Co content is 8%-15% are obtained; and then, by taking the cemented carbide mixtures as raw materials, through the working procedures of kneading by mixing forming agents, extrusion forming, blankdrying and pressure sintering, ultrafine cemented carbide rods are prepared. The ultrafine cemented carbide prepared with the method disclosed by the invention has the advantages of high strength, hardness and density, small WC grains, uniform grain size, and high resistance to plastic deformation.

The invention discloses an experimental facility and an experimental method for a plant photosynthesis research. The experimental facility comprises a plant rowing device, semiconductor light sources, a first processor, a gas detecting device, a temperature sensor and video gathering modules, wherein the plant rowing device comprises a plurality of growing chambers, each of the semiconductor light sources which are adjustable in wave length and illumination intensity is arranged inside each of the growing chambers, so that each semiconductor light source in each plant growing chamber can directly emit light with wave length or illumination intensity, the wave length or the illumination intensity is needed by each plant growing chamber, and accuracy of a research result is improved. Moreover, the video gathering modules used for gathering videos of plant growth conditions are arranged on the positions of through holes between adjacent plant growing chambers, 360-degree real-time monitoring of plants to be researched in each plant growing chamber is achieved, growth conditions of the plants to be researched under different spectra and illumination intensities can be obtained in a continuous or real-time mode, and reliable data are provided for analysis of the growth conditions of the plants to be researched under different spectra and illumination intensities.

The invention discloses an online detection and correction machining method for an enveloping worm tooth surface. Ground finish is carried out on the enveloping worm tooth surface through four-axis linkage in combination with a virtual rotation center principle, online detection is conducted on the enveloping worm tooth surface through three-axis linkage in combination with a spherical measuring head, and machining precision of the enveloping worm tooth surface is obtained through comparison of a practical torus helical line obtained through measurement with a theoretical helical line; whether the machining precision of the enveloping worm tooth surface meets requirements is judged, source tracking processing is carried out on a machining error if the requirements are not reached, grinding program correction and machining tool adjustment is conducted on the machining error value obtained by means of source tracking, and then tooth surface correction ground finish is carried out; the process is repeated until the machining precision of the enveloping worm tooth surface meets the requirements. The method solves the problem of low precision of the enveloping worm tooth surface fundamentally, can be applied to machining tooth surfaces of planar double enveloping worms, toroid enveloping torus worms, involute enveloping torus worms and other enveloping worms, and has principle universality and wide application value.

The invention discloses a simulative division method and a simulative division system for cell coverage. The method comprises the following steps that: after performing discretization on a target area, and then acquiring the coverage diagram of the cell through a free space of a single cell, the system acquires a combined coverage diagram of a plurality of cells; and the system performs vector processing on the acquired combined coverage diagram of the plurality of cells by means of boundary following and key point fitting to acquire the simulative division of the coverage corresponding to each cell. By using the invention, the problems that the conventional cell coverage simulative division algorithm based on Voroni diagram is low in accuracy, and a large amount of data is generated in the cell coverage simulative division based on field intensity are solved.

The invention discloses a method for recognizing a clamping plate furcal hole through an intelligent forklift. The method comprises the steps that a laser scanner acquires the data of the surrounding environment of a fork arm, and passes the environment data back to a software program in the intelligent forklift in real time; the software program analyzes the received environment data, extracts relevant characteristic values of a clamping plate, carries out wave filtering on consecutive points, and filters discrete points; interference point clusters in point clusters generated after the consecutive points are subjected to wave filtering according to the relevant characteristic values of the clamping plate are filtered, cargo pier sets are found, and the positional relationship among the cargo pier sets is analyzed; and the position of the furcal hole of the clamping plate is found and tracked, and the intelligent forklift is guided to complete the furcal hole entering action. The invention further relates to a device for achieving the method. The method and the device for recognizing the clamping plate furcal hole through the intelligent forklift have the beneficial effects that the furcal hole entering accuracy of the intelligent forklift can be improved, and the intelligent forklift can be automatically guided to complete the furcal hole entering action.