246 results about "Distance interval" patented technology

A surgical stapling apparatus configured to perform stapling and/or cutting operations on a target tissue of a patient. The surgical stapling apparatus comprises of a mode selection switch to place the apparatus in either a clamping operational phase or a deployment operational phase. In the clamping operational phase, various clamp components are operated to facilitate loading of surgical staples into the stapling apparatus, if not preloaded, placement of the stapling apparatus to a target surgical site, and clamping of target tissue to be stapled and/or cut. In the deployment operational phase, various deployment components are operated to staple and/or cut the target tissue to one or more desired distance intervals to achieve the desired outcome for the surgical procedure.

A change discrimination device capable of discriminating an alteration of a photographing target only from an aerial photograph or irrespectively of a difference in lighting conditions or photographing conditions at the time of taking a photo, and at minute distance intervals on a pixel basis, which receives input of a plurality of aerial image data at a new time point and an old time point, generates three-dimensional data (DSM) by subjecting the applied aerial image data to stereo-matching processing, generates ortho-image data and ortho-DSM data by normalizing the aerial image data and the generated DSM data, compares colors by using the generated ortho-image of the new time point and ortho-image of the old time point and compares heights by using the generated ortho-DSM data of the new time point and ortho-DSM data of the old time point to discriminate an alteration of a feature on the earth.

The invention discloses a method of lane line detection and an equipment thereof. The method comprises the following steps of: carrying out edge detection on images and calculating edge strength and edge direction of all pixel points in the images; carrying out edge connection on all the pixel points according to the edge strength and edge direction and obtaining edge line segments in the images; carrying out Hough transform on the edge line segments and calculating the maximum accumulative direction thereof in a Hough transform accumulative column diagram including a directional interval and a distance interval; and in the interval of the maximum accumulative direction, finding a distance interval corresponding to a larger accumulative value, thus determining the lane line according to the maximum accumulative direction and the distance interval corresponding to the larger accumulative value. The invention filters and removes interference of point edges by edges which are connected and detected, and eliminates strong interference in the scene with multiple parallel lane lines by finding the maximum accumulative direction.

The invention provides a method for calculating the riverway cross-section flow measured by a non-contact radar. On a riverway cross-section on which a radar probe measurement point is located, cross-section measurement is carried out at a certain distance interval, based on the measured cross-section data, the cross-section polynomial curve fitting is carried out, and the riverway cross-section water surface slope is calculated by combining with a hydraulics manning formula according to the position of a probe, the actually-measured water level, the surface flow velocity and the bed roughness, then based on a hydraulics natural riverway flow calculation principle, a certain number of vertical lines are chosen to divide the riverway cross-section evenly, the depth of water of the verticallines and the corresponding vertical line flow velocity are calculated in sequence, and then virtual vertical lines are made in interval midpoint of each vertical line, a plurality of virtual verticallines and cross-section fitted curves and a riverway water line form a plurality of irregular polygons, the area of each polygon is calculated in sequence, and finally, a weighted area method is usedfor calculating the flow of a riverway large section. The method for calculating the riverway cross-section flow measured by the non-contact radar has important practical value for the popularizationof online flow measurement technology and the high real-time flow monitoring of flood prevention.

A positioning method based on neural network and wireless local area network basic structure is proovided, belonging to the wireless local area network client positioning. The data collecting module, database, positioning request module, positioning calculating module and positioning displaying module are arranged on the positioning server of the wireless local area network; the positioning server is accessed to AP via wireless accessing point obtaining the signal intensity information transmitted by a laptop of the client in a period of time under the predetermined distance interval and measuring time interval, and obtaining the floor number of the client and plane coordinate in real-time way by using Matlab Neural Network kit and displaying the floor number of the client and plane coordinate for the laptop of the client via web page; the signal intensity information comprises date, measuring time, identification of the wireless accessing point, client MAC and signal intensity. The average positioning error is 4.44m while the average sampling distance interval is 6.6m; the average positioning error is 2.98m while the average sampling distance interval is 3.7m, which is better than the effect of the Radar method.

A tire wear state estimation system for a tire calculates tire effective radius during measured distance intervals travelled by the tire from vehicle speed and tire rotation counters. The system includes a filter for selecting slow-speed effective radius measuring intervals and an estimator for estimating the tire effective radius during only those intervals in which the vehicle is travelling below a threshold speed.

The embodiment of the invention discloses an icon control method and a terminal, which are used for solving the problem of terminal error response during the icon dragging by a user on the precise of not influencing the existing operation habit of the user. The method provided by the embodiment of the invention comprises the following steps that a first input of the user is detected, the detected first input is responded, a first icon moves to a second icon, when the distance between the first icon and the second icon is determined to be in a first distance interval, and in addition, the duration of the first icon in the first distance interval in the retaining state is greater than the first preset duration, the operation of executing a first operation on the first icon and the second icon is prompted, and when the distance between the first icon and the second icon is determined to be in a second distance interval, and in addition, the first icon in the second distance interval is in the remaining state, the operation of executing a second operation on the first icon and the second icon is prompted.

The invention provides a method and terminal for acquiring image data. The method comprises the steps of receiving an image acquisition instruction; controlling a lens to move in the direction facing to a photosensitive device or away from the photosensitive device according to the image acquisition instruction; acquiring the image data at the same scene at preset time intervals and at lens moving distance or focus distance intervals. According to the acquisition method and terminal for image data, due to the fact that the image data acquired when an object is located in the field depth range of a focus are clear, multiple image data corresponding to different focuses at the same scene are acquired, and the possibility that the object at the scene is located in the field depth range of one of the focuses can be greatly increased, so that the clear image data can be obtained.

The invention discloses an automatic linkage hooking control method used for a locomotive. The method comprises the following steps of obtaining the initial state of a traction locomotive; when the initial state meets a linkage hooking starting condition, detecting a distance between the traction locomotive and a back trailer; comparing a current distance value with at least two preset distance intervals corresponding to different speed ranges respectively, determining a preset distance interval to which the current distance value belongs, and controlling the traction locomotive to run in the car speed range corresponding to the preset distance interval; when the traction locomotive meets a linkage hooking condition, applying braking to and carrying out linkage hooking operation on the traction locomotive. The invention also discloses an automatic linkage hooking control device used for the locomotive. The invention also discloses the locomotive comprising the automatic linkage hooking control device. By using the automatic linkage hooking control method, linkage hooking operation steps can be simplified; the linkage hooking impact is reduced; the riding comfort of a driver is improved; the operation time wasted due to the failure of linkage hooking is saved.

The invention provides a multiple-unmanned aerial vehicle cooperative passive location method based on improved distance parameterization. First, an initial distance interval is divided, and the weight of the distance interval is initialized; then, squared root cubature information filtering is performed separately on the sub intervals, and the weight of the distance interval is updated; and weighted fusion is performed on filtering results of all the sub intervals to obtain a final location result. The problem that the covariance matrix is not positive definite due to round-off error of a computer is eliminated, and the robustness of the filtering method is improved. Compared with a traditional distance parameterization method, the amount of calculation of the adopted improved distance parameterization method is greatly reduced. The influence of the initial filtering value to the location performance is avoided effectively, and the real-time performance of the filtering method is improved. Information filtering under a fully distributed fusion estimation structure makes fusion estimation calculation easier and improves the location accuracy.

This disclosure provides a method of setting a threshold according to a level of an echo signal containing an unused component. The echo signal is generated by transmitting and receiving a radio wave with an antenna while the antenna revolves. The method includes acquiring levels of the echo signals at every predetermined distance interval and updating a threshold set for an observing position based on the level of the echo signal at the observing position, the threshold set for the observing position, and a threshold set for a position closer to the antenna than the observing position by the predetermined distance on the same sweep.

The invention provides a method and a device for testing heat exchange coefficients of steel plates with different water film thicknesses. A cylindrical water film cofferdam is welded on the surface of a cylindrical steel plate, the height h of a cofferdam is equal to the tested thickness of the water film; three temperature measuring points are set in a direction perpendicular to cylindrical steel plate at a distance interval x, holes are drilled on the side face of the cylindrical steel plate at positions which are x/2, x3/2 and x5/ away from the upper end face of the cylindrical steel plate, thermocouples are then placed in the holes, and the cold ends of the thermocouples are connected to a multi-channel data acquisition device; during experiment, a steel sample is placed in a heating furnace, then the data acquisition device is started to acquire the temperature; when the steel plate reaches an initial cooling temperature, the steel sample is taken out and placed in a heat-insulation tank which is placed under a spray nozzle, later the spray nozzle is opened to spray water onto the water film cofferdam and thus, and a water film is covered on the surface of the steel plate; and when the steel plate reaches a final cooling temperature, the temperature acquisition is stopped, and thus, the steel plate cooling curve T (t) based on different positions at the upper end face of the cylindrical steel plate is obtained. Therefore, the method and the device can test the heat exchange coefficient of the surface of the steel plates under a condition of different thicknesses of water films.

The invention provides a distance measurement method for a frequency modulation continuous wave radar system. The method comprises the following steps: Step S1. discrete intermediate frequency signals collected by the frequency modulation continuous wave radar system are subjected to discrete Fourier transformation to find out the spectral line number km of the discrete spectrum maximum and the spectral line number kc of the discrete spectrum second-maximum; Step S2. the procedure goes to Step S4 if the number kc=km-1, and goes to Step S3 if kc is not equal to km-1; Step S3. the frequency domain in the discrete intermediate frequency signals is shifted to the right based on delta f/2 to make the spectral line numbers km and kc after shifting meet kc=km-1, wherein delta f is the frequency resolution of the discrete Fourier transformation of the N point; Step S4. the discrete intermediate frequency signals are subjected to discrete Fourier transformation by reducing one sampling point to find out the spectral line number k'm of the discrete spectrum maximum; Step S5. the spectral line number k'm of the discrete spectrum maximum is judged, Step S4 is repeated if k'm=km, and the procedure goes to Step S6 if k'm is not equal to km and k'm=km-1; and Step 6. the distance interval (R1, R2) between the radar and the target is worked out according to the sampling point number of the discrete Fourier transformation and distance relational expression, and the distance value between the radar and the target is R'=(R1+R2)/2.

The invention discloses a missile-borne forwarding type interference inhibition method based on false target characteristics. The method comprises the following steps: step one, arranging a noise basal threshold, a distance threshold scope between false targets and a false target spectrum peak width threshold in advance; step two, when an environment where a radar is disposed is not changed, executing step three, and otherwise, returning to step one; step three, periodically counting a noise background where the radar works, performing pulse pressure matching on echo data received by the radar, processing the echo data whose signal-to-noise ratio exceeds a preset detection threshold, and making true and false target marks on point track data; and step four, for the point track data with already marked true and false targets, according to target associations before and after current time, rejecting the false targets, and forming a true target track. According to the invention, through control of adjustable parameters among three characteristic parameter thresholds including the noise background, the distance interval of the false targets and a false target spectrum peak broadening width, the probability of correctly rejecting the false targets can be greatly improved.

The invention discloses an SAR imaging quick backward projection method based on image spectrum compression, which comprises the following steps: firstly, performing direction blocking operation on full aperture of a synthetic aperture radar for dividing into N sub-apertures, wherein N is a positive integer; determining a first-stage sub-aperture imaging grid in a rectangular coordinate system, and performing coherent accumulation on an echo signal s(x,r) after a distance pulse pressure by means of a projection algorithm BPA, thereby obtaining N sub-aperture rough images of first-grade sub-apertures; in the rectangular coordinate system, performing directional frequency spectrum compression on the N sub-aperture rough images of the first-grade sub-apertures; then setting direction interval and distance interval of a next-grade sub-aperture imaging grid, performing coherent accumulation to the N sub-aperture coarse images of the first-grade sub-apertures after directional frequency spectrum compression successively in a paired manner, obtaining the sub-aperture coarse image of a next-grade sub-apertures; and finally, performing directional frequency spectrum compression and coherent accumulation for finally obtaining a full-aperture image.

The invention relates to a microphone support, in particular to a microphone support for an in-vehicle acoustic mode measurement and testing. The problems that an existing microphone support is difficult to install, accuracy of the position of a microphone is difficult to guarantee, and the microphone support has limitations when being applied to vehicle models. The microphone support comprises a main support, an auxiliary support, a microphone location clamp, a main-auxiliary support connecting rod, a connecting rod clamp, a bolt and a foot support assembly. The main support and the auxiliary support are respectively composed of a cylinder structure and a guiding rod, circular holes are formed in a cylinder on the outer side at a certain distance interval, the cylinders and the guiding rods are respectively provided with scales in a marked mode, and a spring pin is arranged on the guiding rod in each cylinder and used for being matched with the circular holes in each cylinder to enable the height and the width of the microphone support to be conveniently changed. Threads are arranged on the main-auxiliary support connecting rod, and the threads are matched with internal threads of the connecting rod clamp to achieve the effect of being connected with the main support and the auxiliary support. The foot support assembly vertically moves in an up-and-down mode along the main support, and the height can be adjusted in the vertical direction. The microphone support is simple in structure and convenient to machine, carry and install.

A construction layout stripping and method for laying out construction members or framing members at a fixed distance interval from one another. The construction layout stripping comprises: first, a pliably, non-elastic elongated base; and second, repeating units disposed on the base, the repeating units having a plurality of pairs of uprights at fixed intervals, each pair of uprights defining a partition for receiving a specified size of framing member. In a preferred embodiment, the construction layout stripping has upright defining spaces for receiving 1⅝″, 3⅝″, and ½″ framing members on either 16″ or 24″ centers using the same construction layout stripping. The construction layout stripping may have cutting ribs defined thereon for cutting the stripping at a desired length.

The invention discloses a laser sintering machine based on nano hydroxyapatite and used for manufacturing an absorptive artificial bone. An X/Y motion mechanism (1) is arranged on a frame (17). A sintering support plate (18) is arranged on the X/Y motion mechanism (1). A raw material box up-down motion machine (3), a raw material box (6), a sintering table up-down motion machine (4) and a sintering table (7) are arranged on the sintering support plate (18). A feeding left-right motion mechanism (2) and a feeding rod (5) are arranged on the sintering support plate (18). A laser and laser focusing system (16) which is corresponding to the sintering table (7) is arranged on a bracket (15) of the frame (17). Nano hydroxyapatite powder (10-100nm) is arranged on the sintering table (7). Laser energy is assembled into a 50-100micron light spot by a focusing system such as a convex lens. A motion table is moved according to the requirement of section profile and certain sintering distance interval (150-500mum), partial powder is subjected to laser scanning, and a three-dimensional artificial bone is formed finally.

The invention discloses a fault point localizing method and a fault point localizing device. The method comprises the following steps of determining a distance interval of each power device by which each optical cable passes relative to an optical time domain reflectometer (OTDR) test point for each optical cable; conducting the OTDR test on each optical cable, and determining a distance between a fault point of the optical cable and the test point according to an OTDR curve obtained through the OTDR test; and determining a power device corresponding to the distance interval in which the distance stays according to the distance interval of each power device by which the optical cable passes relative to the OTDR test point. The method and the device can realize the localization of the fault point of the optical cable in a communication transmission network.

Multiple sets of view channels originate from multiple projected views modulated through an optic assembly comprising a Fresnel lens, a vertical dispersion lenticular lens, and a diffuser. Compact projection enclosures are formed using image-repeating mirrors to create a three-dimensional autostereoscopic viewing experience in free space without the use of special eyeglasses and without the use of view screens. Multiple sets of images are repeated within a viewing zone that may extend well beyond the confines of the enclosure and may be projected through and beyond a glass window. An observer walking past the window will see one view channel per eye, due in part to the repeated images, and due in part to the vertical dispersion of each projected view. Separate images for each view channel may be created by using two or more cameras spaced apart at a distance interval to match the average horizontal distance between the eyes of a human observer. Multiple views or multiple sets of view channels may be generated and projected.