89results about How to "Overcome influence" patented technology

There is described a method for determining a mechanical axis of a femur using a computer aided surgery system having an output device for displaying said mechanical axis, the method comprising: providing a position sensing system having a tracking device capable of registering instantaneous position readings and attaching the tracking device to the femur; locating a center of a femoral head of the femur by moving a proximal end of the femur to a first static position, acquiring a fixed reading of the first static position, repeating the moving and the acquiring for a plurality of static positions; and locating the centre by determining a central point of a pattern formed by the plurality of static positions; digitizing an entrance point of the mechanical axis at a substantially central position of the proximal end of the femur; and joining a line between the entrance point and the center of rotation to form the mechanical axis.

A method for correcting the image data representing the blood flow for the evaluation and quantitative representation of the blood flow in a tissue or vascular region is based on the signal of a contrast agent injected into the blood. Several individual images of the signal emitted by the tissue or vascular region are recorded and stored at successive points in time. At least two individual images are correlated and a shift vector is generated based on the correlation. Thereafter, the image data of the individual images are shifted in relation to each other according to the shift vector.

A multiple detection function modularized lighting device includes a substrate on which a photographing module is mounted and also includes an indication module, a detection module, an alarm module, and an LED module that are circumferentially arranged as an annular array along a circumference of the photographing module so that the number of all components can be simplified and integrated on the substrate. An opposite side of the substrate includes a control module mounted thereon to drive all the previous modules. The photographing module and the detection module are received and housed in isolation hoods, which are arranged, through an upper housing member having a plurality of positioning holes being mounted atop a lower casing housing member, to have the photographing module and the detection module embedded in the positioning holes so that the modules on the substrate are respectively set in independent areas defined in the upper housing member.

The invention relates to a treatment method of improving oxidation resistance of a thermal barrier coating, belonging to the technical field of thermal barrier coating surface treatment and modification. High current pulse electron beam irradiation is utilized to realize electron beam physical vapor deposition to prepare a yttrium oxide stabilizing zirconium oxide thermal barrier coating to cap ceramic layer columnar crystals, thus the heat-shielding performance and the high temperature oxidation resistance of the coating are improved. The process conditions are shown as follows: the vacuum is 3.5*10<-2>Pa, the voltage is 15kV, the frequency is 1Hz, the pulse width is 120-150ms, the energy density is 10J/cm<2>-20J/cm<2>, the pulse time is 30-40 and the remelting layer thickness reaches at least 10 micrometers. The invention has the advantages that the electron beam physical vapor deposition layer columnar crystals are capped after the high current pulse electron beam irradiation is ended, and thus, the surface of the thermal barrier coating becomes smooth, no penetrable microcracks are generated, the oxygen element diffusion is effectively stopped, the growth of a thermal growth oxidation layer is relieved and the heat-shielding performance and the high temperature oxidation resistance of the thermal barrier coating are obviously improved.

Disclosed a multi-station scanning global point cloud registration method based on graph optimization, including acquiring multi-station original three-dimensional point cloud data; based on initial registration of targets, completing initial registration of point cloud data at adjacent stations by virtue of the target at each angle of view; calculating a point cloud overlap area at adjacent angles of view, and calculating areas of overlap regions of adjacent point cloud by a gridded sampling method; constructing a fine registration graph structure, and constructing a fine registration graph by taking point cloud data of each station as a node of the graph and taking an overlap area of the point cloud data of adjacent stations as a side of adjacent nodes of the graph structure; and based on loop closure fine registration based on graph optimization, gradually completing point cloud fine registration of the whole aircraft according to a specific closure sequence.

The invention relates to an alkylation product desulphurization and deacidifying method and device, and provides an alkylation product desulphurization and deacidifying method. The invention further provides an alkylation product desulphurization and deacidifying device.

The invention provides a method for sending rank indication singling in a sharing channel on a physical uplink, which comprises the following steps of: arranging RI singling in a subframe on OFDM symbols different from OFDM symbols where sounding pilot is, and sending the subframe in the sharing channel on the physical uplink. The sending method of the invention can prevent the sounding pilot from affecting the RI singling and dose not reduce decoding performance of the RI singling, thus ensuring the integral performance of the system.

An electromagnetic actuating device, in particular camshaft adjustment device, having an armature unit (14) which can be driven in the axial direction or parallel thereto in reaction to energization of a stationary, axially oriented coil unit (10) and is designed to interact with a slide and/or plunger unit (16) which extends in the axial direction, in particular a plunger unit which brings about camshaft adjustment of an internal combustion engine, wherein permanent magnet means are provided on and/or in the armature unit and/or the slide or plunger unit, and the coil unit and armature unit are accommodated at least partially in a housing unit or carrier unit.

The invention discloses an OFDM (Orthogonal Frequency Division Multiplexing) symbol timing and frequency offset estimation method based on a particle swarm optimization (PSO) algorithm. The OFDM symbol timing and frequency offset estimation method comprises a scheme designing process and a scheme implementation process, wherein the scheme designing process comprises a step of establishing a corresponding relationship between an OFDM symbol timing and frequency offset combined estimation parameter and each parameter of an PSO algorithm; and the scheme implementation process comprises a step of finishing a task of searching an OFDM symbol timing and frequency offset combined optimal position. The OFDM symbol timing and frequency offset estimation method can be used for realizing the accurate estimation on symbol timing and frequency offset, effectively overcoming the influence of the integer frequency offset in a conventional OFDM symbol synchronization algorithm to symbol timing estimation and realizing the purpose of accurately estimating the OFDM symbol timing and the frequency offset. The computation complexity can be reduced and the OFDM symbol synchronization time is shortened on the precision of not reducing the performance; and the OFDM symbol timing and frequency offset estimation method is a simple and practical method for realizing the OFDM symbol timing and the frequency synchronization in a packet bursting wireless transmission system.

The invention discloses a vision detection system and method capable of resisting sunlight interference, belonging to the technical field of vision detection. The system comprises a camera, laser, a reflective marker and a processing system, wherein the laser and the camera are arranged at a measuring point of the detection system in parallel and are respectively connected with the processing system; the reflective marker is arranged at any characteristic point of a target to be measured and has no mutual displacement with the target to be measured; the laser is connected with the processing system and is used for receiving a control command; the laser is used for radiating laser rightly opposite to the reflective marker and illuminating the reflective marker; the camera is used for acquiring an image of the reflective marker and transmitting the image to the processing system; and the processing system is used for processing the image and acquiring the specific position of the reflective marker. According to the vision detection system and method disclosed by the invention, semiconductor laser beams are adopted to directionally illuminate; the reflective marker is produced by using a film material with retroreflectivity and is used for directionally reflecting incident light of an active light source; the influence from sunlight is effectively reduced by using narrow-band light filtering; and the stability and the detection precision of the detection system are remarkably improved.

A resistive non-volatile memory cell including a Metal-Insulation-Metal stack including two electrodes and a multilayer of insulation, placed between the two electrodes, including a thin layer of oxide allowing for a resistive transition and an oxygen vacancy reservoir layer is provided. The stack includes from bottom to top: the bottom electrode including a metal layer, the insulation including a layer of stoichiometric metal oxide and a layer of substoichiometric metal oxide forming the oxygen vacancy reservoir layer, and the top electrode including a layer of metal oxide and a metal layer, such that the oxygen vacancy reservoir layer is inserted between two metal oxide stoichiometric layers.