558 results about "Homogeneous distribution" patented technology

A method to obtain thin (less than 300 nm) strain-relaxed Si_1-xGe_x buffer layers on Si or silicon-on-insulator (SOI) substrates. These buffer layers have a homogeneous distribution of misfit dislocations that relieve the strain, remarkably smooth surfaces, and a low threading dislocation (TD) density, i.e. less than 10⁶ cm². The approach begins with the growth of a pseudomorphic or nearly pseudomorphic Si_1-xGe_x layer, i.e., a layer that is free of misfit dislocations, which is then implanted with He or other light elements and subsequently annealed to achieve the substantial strain relaxation. The very effective strain relaxation mechanism operating with this method is dislocation nucleation at He-induced platelets (not bubbles) that lie below the Si/Si_1-xGe_x interface, parallel to the Si(001) surface.

A super absorbent distribution system for homogenous distribution throughout an absorbent core is disclosed. A super absorbent material is injected into a stream of absorbent fluff at an opposite direction to that of the stream of absorbent fluff. The super absorbent is blasted into the peak and outer surface of a cone shaped super absorbent barrier. The oncoming absorbent fluff also contends with a similarly shaped absorbent fluff barrier. The super absorbent material slows down as it hits the super absorbent barrier and oncoming fluff, then stops, then reverses direction and flows with the absorbent fluff as a homogenous distribution of super absorbent material and absorbent fluff. The combination of super absorbent material and absorbent fluff may encounter baffle members to further distribute the super absorbent material and absorbent fluff.

The invention relates to a multisensor-based three-dimensional outline measuring device and a measuring method thereof. The measuring device comprises a base plate, a vertical movement platform, a working table surface and light measurement sensor assemblies. The working table surface is provided with four or more than four light measurement sensor assemblies which are evenly distributed around a measuring hole; each light measurement sensor assembly comprises a laser, a camera and a camera mount; the lower end of each camera mount is buckled on an assembly guide way which is fixed on the working table surface; the cameras are arranged on the camera mounts; and the lasers are fixed on the working table surface. The invention utilizes the light measurement sensor assemblies to improve the measurement speed and provides an effective technical measure for the batch detection of industrial site components; and the invention adjusts field coverage and amplification ratio according to the surface shape of a tested component and is adapted to the measurement of a complex curve surface of a blade or a conical gear, and the like, which cannot be effectively measured by using conventional methods.

The invention discloses a method and system for multi-target reactive power optimization of electric power systems. The method comprises the following steps of: establishing a multi-target reactive power optimization model; generating positions of N initial bird nests by utilizing Kent chaotic mapping, taking the positions of the N bird nests as initial populations, calculating a fitness value of each bird nest, establishing an external file set according to a Pareto dominance relation, updating the positions of the bird nests according to self-adaptive weights, updating the external file set according to the dominance relation and calculating a congestion distance to control the capacity of the file set; carrying out a differential evolution operation on each bird nest and updating the external file set; and when an iteration termination condition is satisfied, outputting an optimum Pareto optimal solution set. According to the method and system, a plurality of target functions are considered, so that the disadvantages that the traditional method is used for converting a plurality of targets into a single target and is difficult to determine the weight coefficients are optimally overcome; an improved cuckoo search algorithm is high in convergence rate, high in precision and good in individual diversity; and the obtained optimal solution set has favorable diversity and uniform distributivity, and can be well adapted to solving the multi-target reactive power optimization problems of the electric power systems.

The invention discloses a non-uniform distributed multi-baseline synthetic aperture radar three-dimensional imaging method, and relates to the three-dimensional imaging technology. The method comprises the following steps of: performing two-dimensional focusing on primary echo data obtained by flying observation at each time to obtain single-look complex images; registering sequences of the single-look complex images to acquire non-uniform sampling data of an observation target under different visual angles; removing inclination aiming at the non-uniform sampling data to perform phase modulation; then estimating a spatial spectrum of the primary uniform sampling data by using a missing data-based amplitude phase estimation method and maximizing mathematically expected iterative operation of observation data so as to implement imaging of a target height direction; and finishing three-dimensional imaging of the target by combining a two-dimensional target image obtained in two-dimensional imaging of each track. The method for performing the imaging of the height direction based on the amplitude phase estimation method reduces elevation blur caused by multi-baseline non-uniform distribution and acquires clear high-resolution target three-dimensional imaging results.

Te invention discloses a two-dimensional self-adaptive radar CFAR (constant false alarm rate) detection method, and mainly solves reduced detection performance during detection by using a signle CA_CFAR method and a signle OS_CFAR method when multiple targets or strong interference occur in clutter background. The method is realized through the following steps of 1) dividing a M*N clutter matrix block following different distributions into n p*q sub-blocks; 2) calculating a judgement factor alpha of an attribute of every sub-block; 3) judging the attribute of every sub-block according to the judgement factor alpha; 4) calculating a two-dimensional unit average CFAR detection threshold value factor T1 and a two-dimensional ordered CFAR detection threshold value factor T2 in different clutter distribution conditions; 5) obtaining detection thresholds K1 (i, j) and K2 (i, j) of every data unit of uniform distributed sub-blocks and non-uniform distributed sub-blocks respectively by using the threshold value factors T1 and T2; and 6) comparing the detection thresholds with every data unit during radar target detection, thereby determining whether a target exists in the data units. The method has the advantages of high detection performance and strong capability of coping with complex environments.

The present invention belongs to the field of powder metallurgical product, and is gas catalyzing and filtering material and its preparation process. The porous catalyzing and filtering metal material consists of porous metal or alloy matrix, middle transition layer and active component. Its preparation process includes preparing porous metal or alloy matrix, preparing middle transition layer and supporting active component. The porous catalyzing and filtering metal material with porous metal as carrier and transition metal oxide as active component has excellent features of low density, great specific surface area, high porosity, high heat conductivity, etc. as well as homogeneous distribution of active component, fast supporting, high catalytic activity and high heat stability. It has simple preparation process, low cost and easy industrial application, and is suitable for high temperature gas and fume purification.

A method is disclosed for making reduced calorie cultured cheeses whereby the natural lipid content of milk is replaced with colloidal forms of synthetic or chemically structured lipids displaying low to no human digestibility. The colloidal dispersion of modified lipids contained within the milk base is initially stabilized by preferred combinations of polymeric and particulate hydrocolloidal materials such as structurally expanded cellulose. Such stabilization is important during formation of the curd to ensure homogeneous distribution and maintenance of the lipid dispersion throughout the coagulum yet allow effective concentration of the coagulum solids by means of ordinary water removal methods commonly used in the manufacture of conventional cultured cheeses. The coagulum is then processed by means similar to that employed for naturally fermented cheeses. The resulting cultured cheese is a reduced calorie product with low to no metabolizable fat content yet possesses organoleptic properties similar to a full fat product.

A system for generating a profile of particulate components of a body fluid sample is provided. The system includes: (a) a device for causing controlled flow of the body fluid sample on a substrate, the controlled flow of the body fluid sample leading to a differential distribution of the particulate components on the substrate; and (b) a magnifying device being for providing a magnified image of differentially distributed particulate components on the substrate, the magnified image representing a profile of the particulate components of the body fluid sample.

The invention relates to a line-scanning confocal ophthalmoscope system based on laser diffraction and a method. The system comprises a linear beam generation module, a beam-splitting module, a scanning module, an imaging module and an output module. The invention is characterized in that: the intensity of the linear beam generated by the line-scanning confocal ophthalmoscope system is uniformly distributed in a non-Gaussian form, a scanning galvanometer is adopted to scan the linear beam in a one-dimensional space to illuminate an ocular fundus retina, meanwhile, a linear detector is used for imaging the non-scanning linear beam reflected by the ocular fundus retina, and since the system only uses one scanning galvanometer and one linear detector, the number of the moving parts is less; meanwhile, a confocal slit is conjugated with the ocular fundus retina plane, consequently, the affection of the stay light of the non-retina plane on the imaging quality is eliminated, and thereby the high resolution of the confocal imaging principle. The system has the advantages of good linear beam quality, simple system structure, easy manufacturing, short light path, easy adjustment, small size, applicability, high stability and high imaging frame frequency.

The invention discloses a visual position-pose measurement method based on point-line combination characteristics, which belongs to the technical field of computer vision measurement and relates to a method applicable to measurement on the position and pose of a split-type cylinder-like object moving at high speed. The surface point-line combination characteristics of the cylinder-like object moving at high speed are acquired by a binocular visual system; a target axis and a local coordinate system can be obtained through five steps of calibrating by a high-speed camera, segmenting a point-line characteristic image, extracting characteristic marks, matching the characteristic marks, and acquiring the position and the pose, and then target position-pose information is acquired according to the target axis and the local coordinate system; the point-line combination characteristics consists of circle reflection marks with two axes respectively formed at the front segment and the rear segment of a target object coinciding with target axes, and four point reflection marks which are uniformly distributed at the circumference of the middle segment of the target object and are restrained from different distances to the circle at the front end. The problems that the axis of the cylinder-like object is not easy to acquire, the precision of the acquired axis is low, and the surface mark can not be precisely positioned due to the repeated assembly of the split-type object are solved by utilizing straight-line characteristics of strong anti-noise capacity and large information amount which are matched with point characteristics.

The invention discloses an MM-CFAR target detection method. The method is characterized by comprising the following steps that 1, uniformly-distributed clutter background models and non-uniformly-distributed clutter background models are built; 2, a model set corresponding to clutter background areas is built; 3, MM-CFAR reference windows are divided into a left reference window and a right reference window; 4, weight calculation is conducted according to the model set M, and corresponding constant false alarm processing is conducted according to the value of the weight; 5, threshold coefficients B[0] and B[1] are calculated, a detection probability formula is obtained according to the weight of CA-CFAR and CMLD-CFAR, and detection probability P[d] is obtained. The MM-CFAR target detection method is used for various clutter backgrounds, and the advantages of the CA-CFAR and CMLD-CFAR during detection in uniform backgrounds and non-uniform backgrounds are respectively utilized; compared with a general OS-CFAR, the detection probability is greatly improved in clutter edge backgrounds.

An improved tempura batter system comprises an improved primer layer and improved batter matrix layer. The batter matrix is formed from a controlled gelling of batter-forming components which balances control of gelatinization, coagulation and gelation with cellular network expansion while managing water mobility and quantity. A balancing of cereals, proteins, leavening system, fat and emulsifier produces effective gelatinization characteristics and controlled formation of outer shell. A network of well-distributed, uniformly-sized gas cells is provided throughout the matrix by employing an aerated and/or emulsified plastic fat.

The invention discloses a method for rectifying the position and the phase of a frequency-domain optical coherence tomography signal, which comprises the following steps that: a B scanning initial position is rectified by an amplitude normalized crosscorrelation method; a zero optical path different position of an A scanning signal along a Z direction is rectified by the amplitude normalized crosscorrelation method; the phase rectification of the A scanning signal is realized based on the matching of the phase difference distribution characteristic vectors of the A scanning signal; the relations of the amplitude normalized crosscorrelation values and the cross ranges of all the sub areas are obtained, and the lateral position of the A scanning signal is calibrated; and the A scanning signal which has the unevenly-distributed lateral positions is converted into the evenly-distributed A scanning signal through interpolation. The method eliminates the system scanning error and the influence of sample vibration on the signal stability when an in vivo biological tissue is imaged. The method does not need to increase the hardware, not influence the system scanning speed and is suitable to the tissue detection of a living body; the method realizes the phase rectification at high accuracy and fast speed; and the method has strong portability, and can be used for Doppler optical coherence tomography (OCT) and other fields.

The pressurized and closed dry coal powder conveyer with several discharge branches includes normal pressure coal portions bin; connected variable pressure bin with gas inlet connected to the nitrogen cylinder, coal powder outlet connected to pressurizing bin and gas outlet connected with filter and the pressurizing bin; pressurizing bin with gas inlet connected to the nitrogen cylinder and coal powder outlet connected to the powder distributor; and powder distributor with lower end connected to nitrogen pipeline and outlet with set shunt branch pipeline. The present invention has powder buffer connected to the pressurizing bin and no mechanical rotating part, and is suitable for closed conveying of high pressure powder. Installing the powder distributor realizes the homogeneous multiple branch conveying with one locking bin system in high overall stability and homogeneous distribution.

An apparatus and method for loading particulate material in a vertical tube comprising at least one impact-absorbing module, a central axis and a sustaining wire to position the apparatus suspended in the interior of the tube in such a way as to allow loading and uniform distribution of all the material loaded in the tube and the method of loading that uses the apparatus is also described.

The invention discloses an optical element X, Y and theta Z three-freedom-degree jogging regulation device belonging to the field of structural design and aberration compensation of a photoetching object lens. In order to solve the problem of X, Y and theta Z three-freedom-degree high precision regulation of an optical element, the invention provides an optical element flexible jogging regulation device based on a 3-RRR plane mechanism. The optical element X, Y and theta Z three-freedom-degree jogging regulation device comprises an optical frame, three drivers and two capacitor sensors, wherein the three drivers and the two capacitor sensors are respectively fixed on the optical frame, the optical frame is of an integrated structure and comprises an optical frame inner ring, an optical frame outer ring and three movement branch chains, each movement branch chair comprises three flexible hinges, a connecting rod and a second connecting rod, the outer side of each movement branch chain is connected with the optical frame outer ring, the inner side of each movement branch chain is connected with the optical frame inner ring, and the three movement branch chains are respectively uniformly arranged at intervals of 120 DEG along the circumferential direction. The optical element X, Y and theta Z three-freedom-degree jogging regulation device is suitable for the jogging regulation of the optical lens in a deep ultraviolet projection objective.

The process of extracting and separating lycopene from tomato includes the steps of: preparing tomato dry powder; filling tomato dry powder to ensure the flow and homogeneous distribution of supercritical CO2; starting extracting and separating device and regulating the flow rate of CO2 and entrainer and pressure in the two stage separator; extracting and separating lycopene continuously at flowing supercritical CO2 condition; and discharging product. The present invention has high extracting and separating speed, high extracting efficiency, high purity of separated product, low running cost and no pollution.

The invention discloses a test platform and a test method for simultaneously identifying multi-point random loads, belonging to the technical field of load identification. It solves the problem of large errors in the identification results of loads caused by improper selection of response measuring points. The excitation signal output end of the signal generator of the test platform is connected to the excitation signal input end of the power amplifier, and the excitation signal output end of the power amplifier is connected to the excitation signal input end of the vibrator. On multiple stimulated points of the recognition system, the multiple stimulated points are determined according to the relative position of the load point to be recognized, a force sensor is set at each stimulated point of the recognition system, and multiple presets on the recognition system An acceleration sensor is respectively arranged at a predetermined evenly distributed response point, and the number of the response point is more than the number of the stimulated point. The test method uses the aforementioned test platform to realize the identification of random loads. The invention is suitable for identifying random loads.

The invention discloses a computing method for comprehensively improving spatial statistics channels for an asymmetric spatial structure evenly provided with non-uniform scatterers, wherein mobile communication environments such as macro cells and micro cells can be estimated accurately, flexibly and conveniently, and estimation accuracy of channel parameters such as the reaching angle and reaching time of electromagnetic signals and the channel capacity performance in an MIMO system can be improved effectively. The statistics channel computing method based on the asymmetric spatial structure and the non-uniform scatterers is achieved based on an asymmetric spatial statistics channel model, wherein the asymmetric spatial statistics channel model comprises a mobile station and a base station, a directional antenna is arranged in the base station, and all the scatterers are distributed in a fan-shaped scattering area covered by the antenna of the base station in a non-uniform mode and meet the Gaussian distribution mode or exponential distribution mode. The statistics channel computing method comprises the steps of computing a distribution density function expression of polar coordinates of the scatterers, computing a probability density function of the reaching angle and the reaching time, and computing the channel capacity.

The invention discloses a three-dimensional bipyridine functionalized covalent organic frame material (COF-LZU301) synthesis method which comprises following steps: (1) uniformly mixing tetra(4-anilino)methane in a tetrahedral configuration and linear 6-6'-diformyl-3,3'-bipyridine in an organic solvent; and (2) adding an acetic acid water solution as an acidic catalyst, and performing heating crystallization, centrifugal washing and heat drying to obtain the three-dimensional bipyridine functionalized covalent organic frame material (COF-LZU301). The COF-LZU301 has a three-dimensional diamond topological structure, regular and ordered porous and uniformly-distributed pyridine groups, so that the COF-LZU301 has excellent catalytic activity and shape selectivity for catalyzing a Knoevenagel reaction process. The COF-LZU301 achieves shape-selective catalysis of a typical alkali catalytic reaction.