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.

The invention discloses a system and a method for performing indoor and outdoor 3D (Three-Dimensional) seamless positioning and gesture measuring on a fire man. The system comprises a main control circuit board based on an STM32 (Scanning Tunneling Microscope 32) singlechip, a GPRS (General Packet Radio Service) data transmission module based on Sim-900, a GPS (Global Positioning System) module, a remote monitoring client side, an inertial navigation module I and an inertial navigation module II, wherein the main control circuit board is respectively connected with the GPRS data transmission module, the GPS module, the inertial navigation module I and the inertial navigation module II by virtue of serial ports; and the GPRS data transmission module communicates with the bound remote monitoring client side by utilizing a GPRS network. The system and the method can be used for realizing the indoor and outdoor 3D (Three-Dimensional) seamless positioning and gesture measuring for the fire man, accurately recognizing and judging the motion state of the fire man and meanwhile realizing the indoor and outdoor 3D seamless positioning for the fire man; aiming at the application occasion of the fire man, the system can be expanded to be provided with a poisonous gas sensor, a smoke sensor, a temperature sensor and the like, and has great significance in guaranteeing the life safety of the fire man working under a complex fire scene environment.

The present invention relates to a wireless laser communication PPM polarization modulation- demodulation method, which creates one-to-one correspondence between a PPM signal of an information source and an elliptic polarizing angle. Based on the correspondence, the signal of the information source is modulated into an elliptic polarized light with a corresponding elliptic polarizing angle and emits the light in the form of an optical signal. During demodulation, the polarizing angle of the received elliptic polarized light is calculated to confirm information of the information source corresponding to the polarizing angle according to the correspondence above and then complete information demodulation. The modulation-demodulation method overcomes impact of atmospheric channel on communication and effectively eliminates lower communication code rate and short communication distance of wireless laser communication.

The invention relates to an identification method of image targets of a synthetic aperture radar based on noise independent component analysis, belonging to the technical filed of synthetic aperture radar image target identification. The method comprises the following steps: firstly, preprocessing input images of an original training sample of the synthetic aperture radar to ensure that the images conform to whitening and zero mean normalization and the probability density of image noise complies with Gaussian distribution; secondly, performing logarithm noise independent component analysis on the preprocessed training sample and a real-time measurement sample to be identified, extracting the independent component characteristics of the images to be identified; and finally, identifying the sample to be identified by an independent component analysis method. The independent component characteristics extracted by the method of the invention are more suitable for classification, thus eliminating the image denoising process necessarily to be carried out in the preprocessing stage in an ideal ICA algorithm, improving the robustness of the algorithm on abnormal data, improving the instantaneity and reliability of SAR image target identification, and being suitable for SAR image characteristic extraction and automatic target identification.

The invention relates to a treatment method for improving the oxidation resistance of a thermal barrier coating (TBC) bonding layer, and belongs to the technical field of surface treatment and modification of the TBC bonding layer. In the material surface treatment and modification processes, the surface roughness of the TBC bonding layer (MCrAlY) prepared by a plasma spraying method is reduced through high current pulsed electron beam irradiation, and the pores and holes of a coating are reduced, so that the high-temperature oxidation resistance of the TBC bonding layer is improved. Technical conditions are that vacuum degree is 3.5*10<-2>Pa, voltage is 15kV, frequency is 1Hz, pulse width is 50 to 200mu s, energy density is 8 to 18J/cm<2>, and pulse times is 10 to 20. The method has the advantages that the surface roughness of the TBC bonding layer (MCrAlY) prepared by the plasma spraying method is reduced through high current pulsed electron beam irradiation, the pores and holes of the coating are reduced, and penetrated microcracks are avoided, so that the high-temperature oxidation resistance of the TBC bonding layer is effectively improved.

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.

According to the present invention, a service is configured by a plurality of sessions and respective session negotiation requests defined by different media formats can be performed without influencing existing connected sessions, and hence it is easy to add, delete, and change the media, the contact of session negotiation can be specified, and the response to the session negotiation request can be processed easily with the service acceptance or rejection of the contact.

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 an object identification method based on UWB communication signals. According to the object identification method based on the UWB communication signals, a wireless sensor network is formed by a plurality of communication nodes, wherein each node comprises multiple MIMO antennas to receive signals. Firstly, characteristic parameters of signals received by the multiple antennas are extracted, parameter fusion is carried out on the extracted characteristic parameters, and a classification model is obtained through a fusion parameter training classifier. The classification model enters an identification mode after training is completed, and an object is identified by using the classification model. Through the utilization of the multi-antenna technology, the accuracy of object identification is improved, the anti-jamming capability of a system is enhanced, and normal wireless node communication is not influenced.

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.

The invention provides a high-resolution remote sensing image supervised segmentation method based on a variable Gaussian hybrid model, and the method comprises the steps: carrying out the supervised sampling of each ground feature class in a to-be-segmented high-resolution remote sensing image, and calculating the frequency of the gray value of each pixel in the corresponding ground feature class; building a variable Gaussian hybrid model for different ground feature classes in a gray measurement space of the high-resolution remote sensing image; enabling a spatial relation to be fused, and building a target function of the high-resolution remote sensing image; and carrying out the dividing of a target function matrix of the high-resolution remote sensing image according to the maximum probability measurement principle. The method can achieve the precise fitting of the complex distribution features of the high-resolution remote sensing image, is good in anti-noise performance, determines a Gaussian component number through the adaption to the same ground feature class, and achieves the precise fitting of the complex distribution features of the high-resolution remote sensing image. After the fusion of the spatial relation, the method well overcomes the impact on the segmentation result from geometric noise and pixel abnormality, and improves the segmentation precision.

The invention discloses a self-adaptive kinetic control method of a mobile robot. Environment interference is considered, and the precision of a system model is improved. External interference is observed through an observer, and the influence of external interference on the mobile robot is overcome; meanwhile, the precision and response speed of a system are improved, and the practical value is great; the stability of the system is further guaranteed through optimization of the observer and an adaptation law.

The invention provides a map-like atrophy projected image generation method based on SD-OCT retina images. The method comprises the realizing steps that 1, the SD-OCT retina images are collected; 2, Bruch's membrane boundaries of the images obtained in the step 1 are divided; 3, each column of pixel points with gray values decreased progressively from top to bottom are located in the narrow-band area which is 0.5 millimeter thick and is located below the Bruch's membrane boundaries; 4, the pixel points, with the gray values decreased progressively, obtained in the step 3 form a curved surface, and the area between the curved surface and horizontal coordinates is used as a value of a GA projected image to generate a projected image; 5, the GA projected image generated in the step 4 is smoothed through median filtering to obtain the final result. According to the map-like atrophy projected image generation method based on the SD-OCT retina images, the influence on the GA projected image from the choroid membrane layer blood vessel is considered and overcome, and the contrast and gray scale uniformity of the GA projected image can be improved.

The invention discloses a method utilizing lumped parameters to realize line interphase fault single-terminal location. According to the method, the lumped parameters are adopted to describe the physical properties of voltage and current transmission of a transmission line; the fault interphase negative sequence current phase angle of a relay location of the transmission line is adopted to calculate the voltage phase angle of an interphase short circuit fault point; and the fault location is calculated according to the linear relationship between the voltage drop from the relay location of the transmission line to the interphase short circuit fault point and the fault location. According to the invention, as the fault location is calculated according to the linear relationship between the voltage drop from the relay location of the transmission line to the interphase short circuit fault point and the fault location, the influences of the transitional resistance and the load current to the location precision are avoided, the location precision is high, the location principle is simple and the practicability is strong. The method can directly calculate the fault distance without adopting the search algorithm, and is high in location speed and strong in real-time performance.

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.

The invention belongs to the technical field of organic photoelectric functional materials, and particularly relates to an ionic type iridium complex with double phosphorescence emission properties as well as a preparation method and an application of the ionic type iridium complex. The complex comprises a metal center and cyclometalated ligands. The preparation method comprises steps as follows: dichloro bridge is prepared from a phenylpyridine derivative and iridium(III) chloride trihydrate through a coordination reaction, and the ionic type iridium complex with the double phosphorescence emission properties is prepared from dichloro bridge and a dipyridyl derivative or sodium carbonate through coordination reaction. The ionic type iridium complex with the double phosphorescence emission properties can be applied to the fields of biological detection and biological imaging for hypoxic oxygen-enriched conditions; a diagnosis and treatment integrated multifunctional probe based on the ionic type iridium complex with the double phosphorescence emission properties has great potential in further biomedicine application.