37 results about "Center of area" patented technology

The invention relates to an arrangement and a method for contactless energy transmission by means of induction. There are a plurality of coils arranged in a matrix, the coils having at least one conductor that surrounds a central axis of the coil at least once in one turn. The central axis stands vertically on the surface surrounded by the conductor in the geometric center of area of the surrounded surface. The coils are arranged adjacent to one another in a planar unit that extends in a first dimension, in a second dimension, and in a third dimension. The extension of the planar unit in the first dimension and in the second dimension is significantly greater than in the third dimension. The central axis of each coil stands at least locally at least nearly perpendicular to the surface spanned by the first dimension and the second dimension. The coils are also arranged in a regular manner within the planar unit in rows and / or columns such that each coil has at least two or three immediately adjacent coils. The distances between geometric centers of area of the coils and the shape and the extension of the at least one turn per coil are selected such that the mutual electromagnetic coupling between coils is minimal for all pairs of immediately adjacent coils in the planar unit.

The embodiment of the invention discloses a high-precision and high anti-interference positioning method and device for a Mark point of a PCB. The high-precision and high anti-interference positioning method for the Mark point of the PCB comprises the steps of performing picture partition on a picture of a to-be-positioned datum point Mark point according to a differential value between pixel values to obtain a sub-picture; acquiring the rough circle center and the rough radius of the circular area in the sub-picture by adopting a center of area method; based on the rough circle center and the rough radius of the circular area, determining the datum point in the picture by utilizing a probe method. Interferences of other circular objects can be effectively eliminated, the anti-interference performance of PCB datum point positioning can be improved, and the positioning precision can be further improved.

The invention relates to a progressive addition ophthalmic lens and a preparation method thereof. A distant vision zone of the lens has a constant focal power in a range having an about 120-degree flare angle upwards, the deviation is smaller than 0.25 diopters, and the center width of the zone is at least 32mm. The astigmatism in a near vision zone is smaller than 0.25 diopters, and the center width of the zone is at least 10mm. The zone with the constant focal power is substantially superposed with the zone with astigmatism smaller than 0.25 diopters. According to the invention, the contour line distribution is obtained by using a numerical method to dissolve Laplace's equation, and surface rise data of the lens to be processed can be obtained by designing the focal power distributions on the contour line and the meridian line cooperatively. The lens provided by the invention can effectively improve object observing definition and comfort of wearers.

The invention belongs to the technical field of computer vision and image matching, and particularly relates to a method of selecting a matching template in image matching tracking. The method comprises two steps including a step of self-adaptively determining the size of the matching template and a step of judging the locating capability of the matching template; (1) the method flow of the step of self-adaptively determining the size of the matching template comprises the steps of taking the position of a given coordinate point as a center, and setting a split area; carrying out binaryzation on a segmentation area by using an otsu threshold segmentation algorithm and an automatic threshold segmentation algorithm, carrying out statistics on the number of pixels in a foreground region and a background region, and calculating the specific value of the number of the pixels in the foreground region and the number of the pixels in the background region; respectively taking a central point of the segmentation region as a center of pixels in 8 neighbourhood pixel points, and extracting 8 image blocks according to the size of an existing segmentation area; judging the locating capacity of the matching template according to the relationship between a minimal value of a gray difference between 9 image blocks and the segmentation areas and a set value.

A node-link structure is displayed within a display area having a narrow rectangular shape with an edge along one side acting as a horizon of a hyperbolic space half-plane. Lower level node features that share a parent node feature have centers of area positioned on the display in order along a line parallel with the horizon, with sufficiently similar spacings along an axis perpendicular to the horizon from the region around a parent node feature, and with sufficiently similar spacings in a dimension parallel to the horizon from adjacent node features along the line, that the lower level node features sharing the parent node feature are perceptible as a group of related node features. The half-plane model with compression is used for layout of the node-link data, and the hyperbolic layout data is mapped to a Euclidean space for display.

Embodiments described herein include an input device, a display device having a capacitive sensing device, a processing system and a method for detecting presence of an input object using a capacitive sensing device. In one embodiment, an input device includes a plurality of sensor electrodes arranged in a planar matrix array. Each sensor electrode is coupled to unique routing trace and has an identical geometric plan form that is symmetrical about a center of area of the sensor electrode. The geometric plan form of each sensor electrode includes core and a plurality of protrusions extending outward from the core. The protrusions are configured to overlap with protrusions extending outward from each adjacent sensor electrode of the matrix array.

The invention discloses a stress simulation method for a polycrystalline CBN (cubic boron nitride) grain brazing and grinding synergistic effect based on Thiessen polygon partitioning. The method comprises the following steps: generating a random Thiessen polygon by using Matlab software, narrowing microcrystal grains in the Thiessen polygon by taking the center of area as a center through a program, wherein the shape is similar, and the reduction ratio is the volume fraction; importing the generated data into Ansys, and outputting an Iges-format file; importing the generated Iges-format file into Abaqus software for editing, establishing a finite element model of single-layer brazing polycrystalline CBN grains, setting boundary conditions, inputting the material attributes, performing mesh generation on the grains, and finally performing simulation analysis. According to the method disclosed by the invention, the Thiessen polygon partitioning technology, the polycrystalline CBN grain brazing technology, a high-speed grinding technology and a finite element simulation technology are combined, and the resultant stress distribution rule between brazing and grinding is predicted in the polycrystalline CBN grain brazing and grinding process.

The invention discloses a time-domain filtering method based on photon flight time correlation. First of all, photon flight time is obtained by performing scanning by use of a laser radar under the condition of a quite low signal-to-noise ratio, then by use of the flight time correlation between photons, filtering conditions are set for determining the flight time of the photons, signal photons and noise photons are distinguished from each other, next, detection photons which are determined as the noise photons are removed, and only the detection photons which are determined as the signal photons are reserved, finally, a center of area method is applied to the signal photons, the accurate flight time of the photons is extracted, and thus distance information is obtained. Experiments show that under the condition of the quite low signal-to-noise ratio, the method provided by the invention can effectively filter the noise photons in signals obtained by scanning through the three-dimensional imaging laser radar so as to realize the purpose of denoising.

The invention relates to medical apparatuses and instruments, in particular to a pressure dressing device used after a thyroid operation. The pressure dressing device used after a neck operation comprises a fixed belt, a support frame board, an H-shaped pressure board, a pressure water sac (comprises an elastic ball sac, a pressure gage, a water injection joint and a pipeline of the water injection joint). In time of using the pressure dressing device used after the neck operation to dress, firstly, a cutting opening is dressed conventionally, and a negative pressure drainage pipe (drainage bar) is connected. The pressure dressing device is fixed on the neck through the support frame plate from rear to front, and meanwhile, the positions of the pressure board and the water sac are adjusted so that the center of the pressure dressing device directs at the center of area needing oppressing. The pressure gage is observed simultaneously when the water injection joint injects water so as to enable pressure of a wound surface (water sac) of the neck to be adjusted within a safe range required by an operator. The pressure dressing device used after the thyroid operation has the advantages of accurately balancing the wound surface needing oppressing after the oppressing operation, and oppressing on adjacent portions, especially on tracheas is avoided. Therefore, under the condition that the problem of oppression after the neck operation is solved, respiratory function of a patient is prevented from being affected and discomfort of the patient after pressure dressing after the operation is greatly relieved.

The invention relates to an image segmentation method and system. A super pixel is extracted from an image to be segmented, a regional center point of the super pixel is obtained and marked, and mark information of the regional center point of the super pixel is used to mark unmarked sample points. When the regional center point of the super pixel is marked, sparse simplification is carried out on an undirected weighted graph constructed by the sampling points, and a graph based semi-monitoring learning algorithm is used for marking. When the other unmarked sampling points are marked, the unmarked sampling points are marked in a classified manner by utilizing K-neighbor and taking the regional center of the super pixel as basis. The method and system are characterized by being high in speed, high in marking accuracy and suitable for large-scale image segmentation.

A method and apparatus for estimating the motion of an image region (the “center” region) from a source video frame to a target video frame. The motion estimation is locally constrained in that the estimated motion of the “center region” is affected by the estimated motion of neighboring regions. Advantageously, this may reduce common motion matching problems such as false and ambiguous matches. In one embodiment, the locally-constrained motion estimation may be implemented by biasing an error map of the center region using error maps of the neighboring regions.

A magnetic memory device is provided in which, even when a recording layer having an asymmetric shape and a local via are formed over a strap wiring with a sufficient distance allowed therebetween, increase in the size of the magnetic memory device can be suppressed. The magnetic memory device includes the strap wiring, the local via, and a magnetic recording element (TMR element). The TMR element includes a fixed layer and the recording layer. The planar shape of the recording layer is asymmetric with respect to the direction of the easy magnetization axis of the recording layer and is symmetric with respect to the axis of symmetry perpendicular to the easy magnetization axis. The contoured portion of the recording layer on the side closer to the center of area of the recording layer is opposed to the local via formation side.

The invention belongs to an intelligent residential district communication Ethernet system, wherein the system comprises intranet access, a district network system which adopts a star-shaped topological structure, and is divided into a system center, a regional center, a residential building and four grades of users, and a district network intelligent control center which comprises a network core switchboard, a router connected with wide area network, a server and a management work station. The invention is an intelligent residential district communication Ethernet system with advancement, expansibility and high performance price ratio.

A lighting apparatus for vehicle use that projects light forward includes a base, a low beam lamp including a low beam light emitter disposed on the base, a first light emitter disposed on the base and a second light emitter. A lighting controller turns on the low beam light emitter, the first light emitter, and the second light emitter, and an optical system reflects light from the first and second light emitters at least above and below the first and second light emitters, to produce a light distribution pattern. Centers of areas illuminated by the light from the first and second light emitters are horizontally spaced from each other.

The invention discloses a data-driven transit-oriented development urban area division and mining method. The method includes the following steps that: the geographical positions of public transportation station sites are utilized to construct a network; different communication components in the network are extracted to establish point sets; each point set is detected, if the point sets do not satisfy requirements of expected point sets, the point sets are adjusted; the center points of the adjusted point sets are adopted as the centers of areas; points in the areas are allocated to the center of a nearest area; edges are established for the areas through using line data, so that an area network can be formed; the rankings of the areas are calculated according to the area network; and first N areas are outputted so as to be adopted as transit-oriented development (TOD) areas. According to the method of the invention, an urban area can be divided through using the data of the public transportation station sites, and the (TOD) areas are mined, and effective information can be provided for urban development. The method has the advantages of high feasibility, wide application range and accurate mining result.

A magnetic memory device is provided in which, even when a recording layer having an asymmetric shape and a local via are formed over a strap wiring with a sufficient distance allowed therebetween, increase in the size of the magnetic memory device can be suppressed. The magnetic memory device includes the strap wiring, the local via, and a magnetic recording element (TMR element). The TMR element includes a fixed layer and the recording layer. The planar shape of the recording layer is asymmetric with respect to the direction of the easy magnetization axis of the recording layer and is symmetric with respect to the axis of symmetry perpendicular to the easy magnetization axis. The contoured portion of the recording layer on the side closer to the center of area of the recording layer is opposed to the local via formation side.

The invention relates to an arrangement and a method for contactless energy transmission by means of induction. There are a plurality of coils arranged in a matrix, the coils having at least one conductor that surrounds a central axis of the coil at least once in one turn. The central axis stands vertically on the surface surrounded by the conductor in the geometric center of area of the surrounded surface. The coils are arranged adjacent to one another in a planar unit that extends in a first dimension, in a second dimension, and in a third dimension. The extension of the planar unit in the first dimension and in the second dimension is significantly greater than in the third dimension. The central axis of each coil stands at least locally at least nearly perpendicular to the surface spanned by the first dimension and the second dimension. The coils are also arranged in a regular manner within the planar unit in rows and / or columns such that each coil has at least two or three immediately adjacent coils. The distances between geometric centers of area of the coils and the shape and the extension of the at least one turn per coil are selected such that the mutual electromagnetic coupling between coils is minimal for all pairs of immediately adjacent coils in the planar unit.

The invention discloses a tangential inlet capable of achieving twice separation and a single-stage oil-water cyclone separator. The tangential inlet is characterized in that an oil-phase hook-face coalescing plate is arranged in a tangential inlet main body, the oil-phase hook-face coalescing plate is in a wave line shape, the oil-phase hook-face coalescing plate is arranged in the middle in thetangential inlet main body, and three flow guiding plates are fixed to one end, far from coming liquid of the tangential inlet, of the plate; a primary separation pipe is arranged above the oil-phasehook-face coalescing plate, a plurality of manifolds are connected to the pipe, and the openings of the manifolds are respectively arranged in the centers of areas which are marked out by all the hookfaces on the oil-phase hook-face coalescing plate; according to the single-stage oil-water cyclone separator using the tangential inlet, the tangential inlet needs to be tangentially connected and communicated with an outer wall of the upper part of a rotational flow cavity; furthermore, the primary separation pipe is connected with a guiding pipe to be connected into an overflow pipe. By means of the scheme, the single-stage oil-water cyclone separator has the advantages of twice separation function, small equipment space occupation, convenience in operation and maintenance and good separation effect.

The invention discloses an output calibration method for a public-viewpoint naked-eye true three-dimensional display system. The method comprises the following steps that photosensitive sensors are arranged at the two ends of the side edges of a standard display area, and a current projector is selected; only the current projector is turned on, the central point of the current projector is adjusted so as to be aligned with the central point of the standard display area, wherein the projection area is larger than the standard display area; a content output window is initialized, and the four vertexes of the content output window are sequentially moved toward the inner side of the content output window in a black background so that the content output window and the standard display area can coincide with each other; whether all the projectors are calibrated or not is judged, and if not, the next projector which is not calibrated is selected as the current projector to be calibrated and is recalibrated; if all the projectors are calibrated, the task is ended and quit. The output calibration method has the advantages that adjustment accuracy is high, adaptability is high, hardware overheads are low, the interference between all videos is little, adjustment is fast, the method is easy and convenient to use, and manpower consumption and time consumption are low.

The invention discloses a stress simulation method for a polycrystalline CBN (cubic boron nitride) grain brazing and grinding synergistic effect based on Thiessen polygon partitioning. The method comprises the following steps: generating a random Thiessen polygon by using Matlab software, narrowing microcrystal grains in the Thiessen polygon by taking the center of area as a center through a program, wherein the shape is similar, and the reduction ratio is the volume fraction; importing the generated data into Ansys, and outputting an Iges-format file; importing the generated Iges-format file into Abaqus software for editing, establishing a finite element model of single-layer brazing polycrystalline CBN grains, setting boundary conditions, inputting the material attributes, performing mesh generation on the grains, and finally performing simulation analysis. According to the method disclosed by the invention, the Thiessen polygon partitioning technology, the polycrystalline CBN grain brazing technology, a high-speed grinding technology and a finite element simulation technology are combined, and the resultant stress distribution rule between brazing and grinding is predicted in the polycrystalline CBN grain brazing and grinding process.

A large-stroke linkage mechanism two-dimensional plane roundness error calibration method relates to work piece processing two-dimensional plane error. The method comprises the following steps: the overall linkage area of a mechanism is divided into multiple local areas, every two adjacent local areas overlap, the bar length of a ball bar is selected, and linkage error detection is carried out in all the local areas to obtain multiple pieces of local linkage error information based on the center of each local area; error separation is carried out on the local linkage error information based on the center of each local area to obtain the local motion error of two linkage linear axes in each detection area and further obtain the actual coordinates of the end of the ball bar at each motion position; an overall linkage trajectory based on all the local areas is spliced according to the fact that adjacent detection areas have the same error separation information in the overlapping portion; and the center of the whole detection area is set as a common base point, the radial error of each point on the overall linkage trajectory to the base point is calculated, and the overall motion error of each linear axis of motion is separated based on the least squares algorithm for mechanism linkage error compensation.

The embodiment of the invention provides an intelligent door and window communication system. The intelligent door and window communication system comprises a distributed decentration structure or a regional center type decentration structure, wherein each node in the distributed decentration structure is in back-up correlation with other nodes, and each node can send an instruction to other nodes; the regional center type decentration structure comprises multiple nodes with different authority levels, nodes with the same authority levels are in back-up correlation, and the nodes with higher authority levels send instructions to the nodes with lower authority levels or the same authority levels. According to the embodiment of the intelligent door and window communication system, the decentration control mode is adopted, and therefore the fault tolerance, anti-interference performance and safety of the intelligent door and window communication system are all remarkably promoted.

In a thin film transistor device, partition walls define first, second, and third apertures. In plan view, at a bottom portion of the first aperture, a center of a total of areas of a source electrode portion and a drain electrode portion is offset from a center of area of the bottom portion in a direction differing from a direction of the third aperture, and at a bottom portion of one of the first and second apertures, a center a total of areas of a source electrode portion and a drain electrode portion is offset from a center of area of the bottom portion in a direction differing from a direction of the other one of the first and second apertures.

The invention relates to medical apparatuses and instruments, in particular to a pressure dressing device used after a thyroid operation. The pressure dressing device used after a neck operation comprises a fixed belt, a support frame board, an H-shaped pressure board, a pressure water sac (comprises an elastic ball sac, a pressure gage, a water injection joint and a pipeline of the water injection joint). In time of using the pressure dressing device used after the neck operation to dress, firstly, a cutting opening is dressed conventionally, and a negative pressure drainage pipe (drainage bar) is connected. The pressure dressing device is fixed on the neck through the support frame plate from rear to front, and meanwhile, the positions of the pressure board and the water sac are adjusted so that the center of the pressure dressing device directs at the center of area needing oppressing. The pressure gage is observed simultaneously when the water injection joint injects water so as to enable pressure of a wound surface (water sac) of the neck to be adjusted within a safe range required by an operator. The pressure dressing device used after the thyroid operation has the advantages of accurately balancing the wound surface needing oppressing after the oppressing operation, and oppressing on adjacent portions, especially on tracheas is avoided. Therefore, under the condition that the problem of oppression after the neck operation is solved, respiratory function of a patient is prevented from being affected and discomfort of the patient after pressure dressing after the operation is greatly relieved.

The invention relates to a progressive addition ophthalmic lens and a preparation method thereof. A distant vision zone of the lens has a constant focal power in a range having an about 120-degree flare angle upwards, the deviation is smaller than 0.25 diopters, and the center width of the zone is at least 32mm. The astigmatism in a near vision zone is smaller than 0.25 diopters, and the center width of the zone is at least 10mm. The zone with the constant focal power is substantially superposed with the zone with astigmatism smaller than 0.25 diopters. According to the invention, the contour line distribution is obtained by using a numerical method to dissolve Laplace's equation, and surface rise data of the lens to be processed can be obtained by designing the focal power distributions on the contour line and the meridian line cooperatively. The lens provided by the invention can effectively improve object observing definition and comfort of wearers.

The invention relates to a sealed plate heat exchanger (1), comprising a frame body (2) comprising two frame plates (3), between which a plate stack (4) comprising a plurality of heat-exchange plates (5) is arranged, means for feeding and leading away (6) the fluids that flow through the intermediate space between the heat-exchange plates (5) and exchange heat, means for applying force (7) to the frame plates (3), by means of which a pressure can be applied to the plate stack (4), and means for sealing (8) between the heat-exchange plates (5) of the plate stack (4). The center of area of the area of the force application to the frame plate (3) lies within the area that results from a linear projection of the area of the plate stack (4) onto the frame plate (3).