44 results about "Diffusion factor" patented technology

Brightness factors associated with shade fabric may be utilized when shading a building. A brightness factor may incorporate an openness factor, a visible light reflectance, a diffusion factor, a color, or other characteristics of the shade fabric. The brightness factor may be utilized when selecting a particular shade fabric for a room, building or other location. Additionally, the brightness factor may be utilized by an automated shade control system. The shade fabric selection may affect the building envelope by facilitating the optimization of daylighting, reduction of artificial electric lighting needs, minimization of glare conditions, and reduction of thermal load.

The invention provides a method for improving the quality of ultrasonic images, which is used for the optimization of display data of ultrasonic scan images in an ultrasonic imaging system. The method comprises the following step of decomposing ultrasonic image date into a plurality of layers by using a Gaussian-Laplacian pyramid decomposition method, carrying out anisotropic diffusion, filtering processing to Gaussian layer data of the decomposition result, carrying out reverse reconstruction to the processed ultrasonic image data, and improving the quality of the ultrasonic images through a plurality of times of iterative processing, wherein a anisotropic diffusion and filtering algorithm is used to calculate diffusion factors in different directions according to the local structural information of the ultrasonic images so as to filter the image data. As a result of the method, information in organizational-structure regions is enhanced and the noises in non-organizational-structure regions are suppressed effectively.

The invention provides a single-scanning quantitative magnetic resonance diffusion imaging method based on dual echo, and relates to a magnetic resonance imaging method. According to the method, two echoes with the same evolution time are generated through two small-angle excitation pulses with the same turning angle, so that the same transverse relaxation time is achieved; a displacement gradient is added after each excitation pulse to achieve central displacement of the two echo signals in a signal space, and a diffusion gradient is added after the first excitation pulse, so that diffusion reduction only exists in the first echo signal; accordingly, signals under different diffusion factors are obtained. The two echo signals are from one imaging slice, so that the two echo signals can be separated through priori knowledge of the two echo signals by matching sparse conversion with a corresponding separation algorithm. Finally, a quantitative ADC image is obtained by performing apparent diffusion coefficient calculation on two signals obtained through separation. Single-scanning quantitative ADC imaging is obtained through the method, and the quality of the obtained ADC image is good.

This invention relates to a preparing method for coating Li4 Tis O12 on the surface of Li Mn2 O4. A compound with Li and Ti is mixed under the action of a gel for a period of time, then mixed again to become a dry gel, which is baked under 10-250 deg. C for 1-24 hours to become a predecessor to be sintered for 5-24 h under 300-900deg.C to get a LiMn2O4 electrode material with different coated contents. Since this invention considers the 'zero strain' structure of Li4 Ti5 O12 and utilizes its rather high Li diffusion factor, the volume loss resulted from the dissolution of LiMn2O4 is reduced, which not only increases the circulation performance of LiMn2O4, but also influences very little in the process of 10C large current charge and discharge.

The invention belongs to the technical field of axial compressors, and relates to an aerodynamic design method of a subsonic adsorption type axial compressor, in order to solve the problems of increasing of blade rotating angles of a subsonic axial compressor and boundary layer separated in a moving blade during stage load increasing as well as the problems of suction pipeline layout difficulty, blade strength reduction and the like caused by boundary layer suction in the moving blade. On the premise of unchanging an inlet velocity triangle, with design stage load coefficient increasing gradually and exceeding a conventional design value, outlet axial velocity of the moving blade is increased greatly so as to reduce diffusion factors in the moving blade, so that efficient flow of the moving blade is guaranteed; and boundary layer suction is utilized for achieving internal flow of a fixed blade. As boundary layer suction is performed in the moving blade as well as the fixed blade, problems of poor blade strength of a rotatable part and difficulty in suction structure design are solved effectively; and as compared with a tandem cascade technique, the aerodynamic design method has the advantages that blades can be decreased, and accordingly size and weight of an engine are reduced. The method can be applied to aerodynamic design of aero-engines with high thrust-weight ratio.

To provide an anti-glare sheet for a liquid crystal display device with excellent vivid complexion and blackness and excellent image crispness, that is suitable for combination of dynamic images and still images.

An anti-glare sheet for a liquid crystal display device having a diffusion factor in the interior on at least one side of a transparent base material and provided with a functional layer with an irregular surface on the side opposite the transparent base material side, and either having or not having a transparent resin layer with a film thickness of 1.0 μm or greater on the side of the functional layer opposite the transparent base material side, the anti-glare sheet for a liquid crystal display device satisfying the following inequalities (1), (2), (3) and (4), where Q is the intensity of regular transmission, U is the transmission intensity determined by extrapolating a straight line connecting the transmission intensities at regular transmission ±2 degree and regular transmission ±1 degree, to regular transmission, when visible light rays have been irradiated on the anti-glare sheet for a liquid crystal display device, T (μm) is the sum of the thicknesses of the layer having a diffusion factor in the interior and the transparent resin layer, Ha (%) is the haze of the anti-glare sheet for a liquid crystal display device, and Hi (%) is the haze produced by internal diffusion factors.

2.15<Q/U<24.18  (1)

0.2%<Ha−Hi<13.7%  (2)

1.3%≦Hi<35.0%  (3)

2.3 μm<T<12.4 μm  (4)

A method of a test strip detecting concentration of an analyte of a sample includes placing the sample in a reaction region of the test strip, wherein the analyte reacts with an enzyme to generate a plurality of electrons, and the plurality of electrons are transferred to a working electrode of the reaction region through a mediator; applying an electrical signal to the working electrode; measuring a first current through the working electrode during a first period; the mediator generating an intermediate according to the electrical signal during a second period; measuring a second current through the working electrode during a third period; calculating initial concentration of the analyte according to the first current; calculating a diffusion factor of the intermediate in the sample according to the second current; and correcting the initial concentration to generate new concentration of the analyte according to the diffusion factor.

The invention discloses a town gas polyethylene pipeline failure accident analysis implementation method and system. The town gas polyethylene pipeline failure accident analysis implementation method includes the steps: acquiring the classified information of the pipeline failure consequence for a town gas polyethylene pipeline, and the pipeline accident consequence severity influence factor information, wherein the conveying medium hazard information contained in the pipeline accident consequence severity influence factor information includes a medium danger coefficient, a leakage amount factor and a leakage diffusion factor; according to the classified information of the pipeline failure consequence and the pipeline accident consequence severity influence factor information, acquiring the risk acceptable value, and determining whether the risk acceptable value is within the preset lowest reasonable and practicable area; and when the risk acceptable value is within the lowest reasonable and practicable area, giving a prompt that the risk of accident is acceptable. The town gas polyethylene pipeline failure accident analysis implementation method and system establish a town gas polyethylene pipeline failure consequence evaluation factor system, can establish the town gas polyethylene pipeline risk evaluation factor system and pipeline failure risk grades, and can perform accident analysis.

The invention discloses an image restoration method based on curvature-driven diffusion. A nonnegative, smooth and monotonically decreasing guiding function g(s) is introduced through a nonlinear diffusion term portion of a curvature driven diffusion (CDD) model, a self-adaptive CDD model is designed, wherein g(0) is equal to 1, a parameter s is a gradient module value, m is a regulatory factor of a margin guiding function decreasing speed, k is a threshold parameter, and median is mean value operation. The guiding function g(s) changes with change of the parameter s, the diffusion factor changes, and therefore restoration intensity self-adaptive control of an image smooth area and a texture and margin area is achieved. The self-adaptive model is better than a total variation (TV) model and the CDD model when a large scale damaged area is restored, image margin and detail information can be kept well, and vision effect is good.

The invention provides a porous material pore diffusion factor measurement method. The porous material pore diffusion factor measurement method comprises the following steps of (1) preparing a known porous material reference sample which is uniform in porosity and orderly in pore structure; (2) measuring the effective diffusion coefficient of De0 of the reference sample and the effective diffusioncoefficient of De of a sample to be measured, wherein De0=DB*epsilon0*f0/tau0, De=DB*epsilon*f/tau, DB represents bulk diffusion coefficient, epsilon represents porosity, f represents pore restriction factors, and tau represents tortuosity factors; (3) according to the measured efficient diffusion coefficients of the reference sample and the sample to be measured and the pore structure data of the reference sample, calculating the pore diffusion factor of beta of the sample to be measured through the following formula of beta=f/tau.

The invention relates to an electromagnetic solving method for particle launching simulation. The electromagnetic propagation is simulated by the motion of particles, and the density of particles represents electromagnetic energy. Each particle has the attributes of position, velocity, total displacement distance, interval angle, lifetime, existence and the like, and the particles follow the electromagnetic reflection and diffraction laws. In this way, the rendering of particles can be visualized; space can be partitioned according to the required resolution, the number of particles in a grid can be counted, and the electromagnetic energy of the point can be solved; the motion of particles represents the diffusion of irradiation, and the calculation of diffusion factor can be omitted. The electromagnetic solving method has the characteristics of high accuracy, simple and visual method and high degree of parallelism, and can be applicable to various electromagnetic calculation solving and visualization systems.

The invention discloses a smart city air quality high-precision measurement method, which improves the accuracy of regional air quality measurement from the perspectives of sensor spatial arrangementoptimization, air quality prediction and correction and the like, and conforms to the perception measurement of human bodies at different positions in a region on the air quality. The diffusion factors of particulate matters and part of gas components are considered, the air quality sensor groups in the region should be redundantly arranged at different places, meanwhile, the influence of different gas component changes on future air quality data is considered, the future air quality data is accurately predicted, and the most accurate measurement result of the regional air quality is obtained.The abnormal condition of the sensor can be checked, and enough early warning time is provided for air pollution.

The invention provides an automatic adjusting pressure balance apparatus which relates to a testing machine for testing the diffusion factor of the rock of the nature gas. The apparatus comprises: a computer, an air release valve, a pressure balance buffer which is parallel connected with the gas pipe and a micro-differential pressure cell. The pressure balance buffer comprises a liquid storage, a media liquid, an S-type elastic balance sheet, a flange end cap and a cap bolt. The invention is used in oil gas geological exploration test.

The invention relates to a field measuring method for ground reflection coefficients and belongs to the field of radar signal processing. Under the influence of ground reflection, a pitching directional diagram of a radar antenna is subjected to serious beam split, so that the measurement for the detection and elevation of the target is further influenced. In order to more accurately acquire the ground reflection coefficients under different ground conditions, the invention provides the field measuring method for ground reflection coefficients. The method comprises the following steps: (1) correcting a channel and acquiring all the parameters required by normalization; (2) performing stepping measurement: recording an amplitude ratio of upper and lower antenna elements at each time; (3) calculating an estimated value rho' of the ground reflection coefficients; (4) setting a diffusion factor D and a ground surface altitude standard deviation sigma h according to the practical conditions and calculating the estimated value of a ground complex dielectric constant epsilon r; (5) selecting the epsilon r with minimum error. According to the method, the ground reflection coefficients of different ground surfaces can be more effectively calculated and the pitching directional diagram of antenna can be more accurately drawn.

The invention discloses a polycarbonate-substrate hard back-projection screen for edge blending. The polycarbonate-substrate hard back-projection screen for edge blending is formed by processing raw materials of aromatic polycarbonate, light diffusant particles and transparent black masterbatch by means of the plastic extrusion process. The surface roughness of a roller utilized ranges from 10 micrometers to 100 micrometers, light diffusion factor FD is larger than or equal to 0.95. Compared with the prior art, the polycarbonate-substrate hard back-projection screen for edge blending has the advantages of simplicity in processing technique, convenience to transport, easiness to mount and the like, and more importantly, the light diffusant with +/-0.03 to +/-0.09 difference between the light refractive index and the substrate (aromatic polycarbonate) is utilized and usage thereof is determined, so that the optimum gain and a larger diffusion angle are achieved, and multiple projectors can work in edge blending manner and form a full-screen image without seams.

The invention relates to a non-reference network television service quality assessment model. The main technical background of the invention is that: international standard MPEG-2, which is instituted and developed by a moving pictures experts group (MPEG) and used for compressing and coding video and audio, can analyze the influence of injury information of the picture on other information and quantificationally calculates the diffusion range of an injury incident in a space domain and a time domain; a space domain diffusion factor can quantificationally weigh the incidence caused by the injury incident inside a picture frame; and a time domain diffusion factor can quantificationally weigh whether a macroblock is influenced by a reference macroblock thereof or not. The non-reference network television service quality assessment model has the advantages of improving the accuracy and real-time of the video quality assessment.

The invention provides an axial-flow compressor rotor with flow-guiding small blades. The axial-flow compressor rotor comprises rotor blades, a casing and a hub, wherein the flow-guiding small blades, bi-arc straight blades, are further mounted on the casing, and the blade roots of the flow-guiding small blades are connected with the upstream part of the casing and circumferentially and uniformly distributed on the casing; and the axial positions of the flow-guiding small blades are located at the blade tip chord length, 10-30% of the upstream parts, of the blade tips of the rotor blades, and the bending directions of the flow-guiding small blades are in the rotational directions of the rotor blades (1). According to the axial-flow compressor rotor, the attack angles and the diffusion factors of channel air flow in the blade tip areas are reduced, the load of the blade tip areas is reduced, and flow channels are prevented from being blocked by leakage flow at the blade tips of the rotor blades. The stable working scope of the compressor rotor is expanded, and the flow allowance of a compressor is improved. Compared with the blade tip jet technology, the technology adopted by the invention has the advantages that the guide blade processing casing is convenient to mount and simple in structure, external energy supply is not needed, and the industrial manufacturing cost is lowered.

The invention discloses a checkerboard image feature central sub-pixel positioning method. A theoretical model of checkerboard features about grayscale gains and offsets, grayscale jumping edge direction angles and grayscale diffusion factors is established on the basis of a hyperbolic tangent function, a simulated feature region generated by the theoretical model is enabled to reach a highest peak-value signal-to-noise ratio with an already-roughly-positioned actual feature region through model parameter optimization and grayscale level adjustment, and feature center parameters of the theoretical model are extracted to be used as compensation quantity to realize sub-pixel positioning of an actual feature center. The method does not require setting of empirical threshold values, is insensitive to feature brightness variation and noises, and can significantly improve positioning precision of the checkerboard image feature center, and then ensure accuracy of parameter estimation in camera calibration and pose measurement.

The invention discloses an H.264/AVC (Any Video Converter) video scheduling method based on double decoding simulation. The method comprises the following steps of (1) calculating the packet quality contribution index (PQCI) of each H.264/AVC video packet to be transmitted, wherein PQCI is obtained by calculating two kinds of distortion, and each kind of distortion comprises two parts: the quality contribution of the video packet to a current frame and the quality contribution of the video packet to a subsequent frame; (2) during the calculation of the own quality contribution of each video packet, bringing two decoders into a transmitting end for performing distortion estimation by adopting a method based on double decoding simulation, and solving quality contribution; (3) during the calculation of the quality contribution of each video packet to the subsequent frame, solving by adopting a diffusion factor weighting method; and (4) sequencing and scheduling video packets to be transmitted according to the magnitudes of PQCIs, and transmitting the video packets. Due to the adoption of the H.264/AVC video scheduling method, the quality of videos decoded at a receiving end is improved, the performance of video transmission in a wireless network is improved, and user experience of the receiving end is improved finally.

The invention belongs to the field of a liquid phase chromatography analysis instrument, and in particular relates to a diaphragm type sample injection device. The diaphragm sample injection device comprises an upper adaptor (1) internally provided with a cavity, a lower adaptor (2) which is matched with the upper adaptor, and a diaphragm (5) which is arranged between the upper adaptor (1) and the lower adaptor (2); and the diaphragm sample injection device also comprises a shunt (3) which is arranged in the inner cavity of the upper adaptor (1), the shape of the shunt (3) is matched with the shape of the inner cavity of the upper adaptor, a gap which is less than or equal to 2mm is formed between the shunt (3) and the inner wall of the upper adaptor, and at least one bulge is arranged in the gap to be used for connecting the shunt and the inner wall of the upper adaptor. By adopting the diaphragm type sample injection device, the diffusion factor of elution is reduced through the axial and radial transformation of an elution solution, and the sample carrying area of the diaphragm is increased.