406results about How to "Accurate distribution" patented technology

Method and apparatus for disinfecting and/or sterilizing a root canal system by targeting the water content of disease and debris in the canals. The laser technique of employs a frequency of the wavelength emissions between about 930 to about 1065 nanometers with an optimum of 980 nm. This range of wavelengths targets the water content of tissue cells and pathogens as well as any residual organic debris in water within the root canal system after its preparation while being poorly absorbed by the surrounding dentin. The selection of the optimum wavelength produces significant effects generating and advancing treatment to the targeted aqueous environments. This is due to the rapid energy absorption by the water and the subsequent creation of gas bubbles, liberation of heat and subsequent propulsion of waves of heat and gas that impact along the canal walls and ramifications resulting in an enhanced bacterial kill and cleaning of the canal walls and ramifications. No dyes or other additives are necessary to enhance the effectiveness of the laser kill of bacteria, etc.

A device is described that can be easily used to accurately measure and monitor tissue thickness using ultrasound. The device comprises a remote control and data processing unit, a handheld ultrasound transducer, a display monitor and means for effectively coupling ultrasound to tissue.

The present invention relates to a method to measure dose distribution in a patient-shaped phantom with high accuracy. The invention consists of a method of measuring dose distribution in a phantom for radiation therapy treatment verification, a detector configuration in such a phantom, detector improvement and measurement methodology to enable application of correction factors in an accurate way.

To provide a deformable sensor system, which makes it possible to obtain a pressure distribution with a much higher accuracy, while reducing the number of electrodes.

A deformable sensor 12 comprises an elastic material whose electric resistivity, when all types of elastic deformations are caused therein respectively, increases monotonically as an elastic deformation variation in each of the elastic deformations increases. Based on a voltage being detected by means of a detecting unit 22, the deformable sensor 12's electric-resistivity variation δρ(x, y), which minimizes an evaluation Function J of Equation (1) while satisfying a condition of Equation (2), is computed at an electric-resistivity variation computing unit 25 using such a technology as “EIT” that is based on an inverse-problem theory. At an external-force position computing unit 26, a position in a pressure-receiving surface 12a, position which receives an external force, is computed based on the computed electric-resistivity variation δρ(x, y).

J=∥δV(m,n)−S_m,n,x,y·δρ(x,y)∥²  (1)

However, δρ(x,y)≧0  (2)

A non-destructive method of measuring physical characteristics of a medium, such as uncemented sediment, sandstone, or limestone. A pseudo-random code is generated and is used to generate a pseudo-random acoustic signal. This signal is transmitted into the medium to be measured through the use of a transducer, such as a piezoelectric element, and is received by a plurality of hydrophones. The received signal is then processed to obtain an image of its velocity and attenuation. A universal geoacoustic model of the medium for a given set of measured data is determined, and the model is solved to obtain a pair of permeability-porosity results for the medium. The one of this pair of permeability-porosity results which is correctly indicative of the physical characteristics of the medium is then determined.

An emulating system of an over-the-air test comprises a radio channel emulator, a selector, a connector and a plurality of antenna elements placed around a test spot for an electronic device under test. The selector receives data on a simulated radio channel from the radio channel emulator and selects a subset of a plurality of positions of antenna elements on the basis of the data. The connector connects only the antenna elements in the subset and the radio channel emulator for physically realizing the simulated radio channel.

A third stage separator vessel includes a diffuser to promote uniform flow among an array of separation cyclones in the vessel. The vessel has an inlet to receive a gas stream containing solid particles, and the diffuser is mounted at the inlet so that at least some of the stream passes through the diffuser. In an embodiment, a gap between the diffuser and the inlet causes some of the gas stream to flow over an outer surface of the diffuser. The diffuser preferably includes a perforated plate mounted across a wide end of a frustoconical portion. The plate has a plurality of openings through which the flow passes. The openings in the plate have various sizes and positions to direct a greater amount of flow through radially outward portions of the plate than from a central portion of the plate.

The invention provides an automatic parking method. The method comprises the steps: obtaining positions of unoccupied parking spaces in a parking area, controlling a vehicle to park in the parking space according to a calculated parking path; acquiring a parking space image of a parking area by utilizing a plurality of cameras located in the parking area, judging whether a vehicle exists in the parking space or not by recognizing the parking space image, obtaining the parking space distribution of the parking lot, and sending the information of the unoccupied parking space to the vehicle needing to be automatically parked in the parking area; after the vehicle is parked in place according to the calculation path, recognizing and confirming the parking space mark and the license plate number again through the camera. The parking space distribution provided by the invention performs visual identification by using the camera of the parking lot, and compared with the prior art in which a laser radar, a sensor and the like need to be installed in a parking space to identify the parking space, the method provided by the invention has the advantages of low cost, high identification degreeand capability of overcoming the influence of ambient light change on parking space identification.

The invention relates to an aircraft three-dimensional surface flow distribution wind tunnel measurement method. A structured light-based binocular vision three-dimensional point cloud reconstructionsystem and a multi-view image acquisition system are used for wind tunnel three-dimensional flow distribution measurement. Firstly, the binocular vision system is used to reconstruct the surface of awind tunnel test model. According to the aircraft three-dimensional surface flow distribution wind tunnel measurement method, the binocular vision system is utilized to perform the three-dimensional reconstruction of the surface of the wind tunnel test model; a small number of marking points are distributed on the model or at the periphery of the model; and point cloud splicing processing is carried out, so that the point cloud information of the surface of the wind tunnel test model is obtained. In a wind tunnel test, a plurality of cameras are adopted to perform multi-angle shooting on the model, so that the surface flow information of the model under different visual angles can be obtained; and image-to-three-dimensional point cloud coordinate system transformation is carried out through the information of the marking points arranged on the model or at the periphery of the model, so that a two-dimensional flow image can be mapped onto three-dimensional point cloud, and therefore, the three-dimensional full-surface flow distribution of an aircraft can be obtained.

Roughly described, high-stress volumetric regions of an integrated circuit structure are predicted by first scanning one or more layout layers to identify planar regions of high 2-dimensional stress, and then performing the much more expensive 3-dimensional stress analysis only on volumetric regions corresponding to those planar regions that were found to have high 2-dimensional stress. A windowing method can be used for the 2-dimensional scan, optionally with an overlap region extending slightly into adjacent windows. Very narrow features arising at the edges of an analysis window can be relocated to the edge of the analysis window in order to avoid numerical artifacts.

A 3D quantum dot optical path structure is provided, along with a method for selectively forming a 3D quantum dot optical path. The method comprises: forming a single crystal Si substrate with a surface; forming a Si feature in the substrate, such as a via, trench, or pillar; forming dots from a Ge or SiGe material overlying the Si feature; and, forming an optical path that includes the dots. In some aspects of the method, the Si feature has defect sites. For example, the Si feature may be formed with a miscut angle. As a result of the miscut angle, steps are formed in the Si feature plane. Then, the dots are formed in the Si feature steps. The miscut angle is in the range between 0.1 and 5 degrees, and the spacing between steps is in the range between 1 and 250 nanometers (nm).

The invention relates to a realization method of a computer-assisted liver transplantation operation planning system, comprising the following steps: step 1, establishing a normal person liver shape library; step 2, for the liver to be operated, modeling the initial partition result of the liver area by using a method based on sparse representation, and eliminating disturbance of singular point and noise data, so as to obtain a prior shape having a liver area with patient adaptability; steps 3, precisely partitioning the liver by utilizing the prior shape, and simultaneously separating out liver parenchyma, portal vein, liver vein and tumour; step 4, dividing the liver into eight liver segments independent in functions by utilizing the liver vein partition result, and calculating the volume of each liver segment and the tumour; and step 5, carrying out 3D visualization on the partitioning and segmenting result. Compared with the prior art, the realization method has the advantages of high precision and robustness, convenience in realization and capability of treating complicated liver shapes.

The invention discloses a combined medical disaster rescue system and method based on multi-UAVs. The combined medical disaster rescue system includes an information collection rotor UAV subsystem, a material air-drop rotor UAV subsystem, a data communication rotor UAV subsystem and a UAV control ground workstation. The invention further discloses a combined medical disaster rescue method using the combined medical disaster rescue system based on the multi-UAVs. The invention realizes the information collection and the effective disaster rescue of the affected area by using the mode of cooperation between the plurality of rotor UAV subsystems, and has the advantages of low manufacturing cost and high system integrated reliability.

The invention discloses an electronic consumption system for generating and exchanging sales promotion lotteries and a method. The electronic consumption system comprises an information distribution system and a data real-time receiving server which is connected with the information distribution system by a transmission network and is used for receiving sales promotion information from the information distribution system, wherein the data real-time receiving server is connected with at least one consumption terminal which is connected with a consumption information input device, and the data real-time receiving server is used for generating the sales promotion lotteries and exchange information by carrying out matching computation with the information distribution system. The data real-time receiving server is used as a computing center; a POS is used as a data collection and interacting point; real-time treatment, tracking analysis and exchange settlement are carried out based on thecomputing analysis of real buying behaviors; the sales promotion lotteries can be correctly generated, and the sales promotion lotteries can be exchanged accordingly.

The invention provides a method for probability type fingerprint matching in WiFi (Wireless Fidelity) indoor positioning. The method is a method for probability type indoor positioning based on perception probability and kernel density estimation, and comprises five steps. Particularly, the method is a method for introducing the technologies of perception probability and non-parameter kernel density estimation into maximum likelihood probability. The method for probability type fingerprint matching in WiFi (Wireless Fidelity) indoor positioning can characterize distribution features of complex radio frequency signals more accurately through the kernel density estimation method, thus reducing a positioning error and obtaining better positioning accuracy.

The invention provides a prediction method of development distribution of lacustrine high-quality source rock. The method comprises the following steps of by aiming at a main source layer section of atargeted region, (1) respectively recovering an ancient lake mode; (2) respectively defining the shallow lake and semi-deep lake-deep lake distribution range on the basis of deposition and/or sedimentation center, paleo-water-depth distribution and wave base depth; (3) respectively dividing each single well deposition organic phase type on the basis of deposition environment, the ancient lake mode, the organic matter abundance and the organic matter type, and then defining the plane distribution range of advantageous facies; (4) respectively determining a vertical distribution range of the high-quality source rock by using logging data; (5) respectively determining the transverse distribution change of the high-quality source rock by using earthquake data; and (6) respectively drawing development distribution patterns of the high-quality source rock on the basis of the advantageous facies plane distribution range, the high-quality source rock vertical distribution range and the high-quality source rock transverse distribution change. Therefore the concrete distribution of the lacustrine high-quality source rock of the target region, namely the prediction result of the lacustrine high-quality source rock can be obtained.

The invention provides an automatic parking system of a vehicle-mounted Ethernet and an automatic valet parking method. The automatic parking system comprises an automatic parking device installed ona vehicle, a parking management system arranged in a parking lot and a plurality of cameras installed in the parking lot. The automatic parking device comprises a central controller, a first sensor module, a second sensor module and an executing mechanism module. The first sensor module is connected with the central controller through a vehicle-mounted Ethernet bus, and the second sensor module and an executing mechanism are connected with the central controller through a CAN bus. The cameras shoot parking space images and transmit the parking space images to the parking management system forparking space identification and parking space acquisition, the automatic parking device parks in a parking space according to the acquired parking space position, and obstacle identification and avoidance are included in the parking process. According to the technical scheme, time and labor consumed for finding the parking space are avoided; meanwhile automatic obstacle avoidance can be achievedin the parking process.

The invention discloses an optical measuring method and device for the spatial distribution of liquid droplets of a fuel nozzle. By using a characteristic that aromatic compounds in aviation kerosene can emit red-shift fluorescence signals under the excitation of ultraviolet light with a wavelength of 266 nm, a correction scheme for solving the problem that the measurement errors of spatial distribution of fuel are caused due to the attenuation of laser energy in a droplet cone is designed. The method and device disclosed by the invention are characterized in that the spatial distribution of the liquid droplets in the fuel droplet cone can be quickly and accurately measured, and have an advantage of flow field noninterference, transient and time average results can be obtained, and a deficiency that only an average result can be obtained by a fuel accumulation method is solved. The optical measuring method for the spatial distribution of liquid droplets of a fuel nozzle disclosed by the invention can be used for measuring the spatial distribution characteristics of the liquid droplets in the droplet cone of the fuel nozzle of an aero-engine or an internal combustion engine, and for fuel which does not contain fluorescent components, a tracer agent is required to be added.

The invention relates to a sectional type Halbach array permanent magnet motor magnetic field calculation method. The sectional type Halbach array permanent magnet motor magnetic field calculation method comprises the steps of determining solution areas, respectively building Laplace's equations or Poisson's equations for the different solution areas, calculating the interval between magnetic blocks of a sectional type Halbach array, solving the radial and tangential component amplitudes under each order of harmonic waves of residual magnetization intensity of a permanent magnet, solving the built Laplace's equations or Poisson's equations, obtaining an expression of a scalar magnetic potential in the solution areas, and further obtaining radial and tangential components of flux densities of the areas. The sectional type Halbach array permanent magnet motor magnetic field calculation method can accurately solve the magnetic field of an inner and outer rotor sectional type Halbach array permanent magnet motor with any magnetic block number of each pole and any number of pole pairs.

An object is to ensure clear and easy quantification of the textures such as metallic texture and shiny texture of pearl pigment and to rationalize comparison inspection between an inspection object and a reference object. A coloring inspection apparatus 1 includes a camera 2 that is configured to have three spectral sensitivities (S1(λ), S2(λ), S3(λ)) linearly and equivalently converted to a CIE XYZ color matching function, an arithmetic processing unit 3 that is configured to obtain and compute coloring data by conversion of an image which has three spectral sensitivities and is obtained by the camera 2 into tristimulus values X, Y and Z in a CIE XYZ color system, and lighting units 6 that are configured to illuminate an automobile 5 as an example of measuring object. The coloring inspection apparatus 1 computes a color distribution consistency index that represents a ratio of overlap of two xyz chromaticity histogram distributions of an inspection object Q and a reference object R, so as to inspect color.