57 results about "Orthogonal rotation" patented technology

The invention relates to a discrete supervised cross-media Hash retrieval method based on collaborative matrix decomposition, which comprises the following steps of: 1) establishing a cross-media retrieval database, and dividing sample pairs into a training set and a test set; 2) extracting features of all sample pairs in the training set and the test set, and performing mean value removal; 3) projecting features and category labels of the samples to a low-dimensional feature space and a Hash code by using collaborative matrix decomposition and semantic embedding respectively, learning an orthogonal rotation matrix to construct semantic association of the low-dimensional features and the Hash code, and learning a Hash function for each mode; 5) generating a hash code of the test sample byutilizing the learned hash function; 6) taking the samples in the training set as to-be-retrieved samples, taking the samples in the test set as query samples, and calculating the Hamming distance between the query samples and the to-be-retrieved samples; 7) arranging according to a Hamming distance descending order, and returning the first r heterogeneous samples as retrieval results. According to the cross-media retrieval method based on the Hamming distance, cross-media retrieval can be achieved, occupied resources in the training process are few, the accuracy rate is high, and the cross-media retrieval method based on the Hamming distance has wide application prospects.

A system including a rotate block including an array of bit storage units for storing image data bits of a subtile of an image to be rotated, the image data bits of the subtile being arranged in a plurality of subtile rows. The rotate block is operative to load the image data bits of each subtile row of the subtile into the array according to a subtile row load direction that is selected from a plurality of load directions based at least upon a rotate operation to be performed on the image. After loading all the image data bits of the subtile into the array, the rotate block repeatedly unloads image data bits out of the array to produce a rotated subtile. The image data bits that are unloaded from the array from each unloading operation form a subtile row of the rotated subtile.

The invention provides an orthogonal rotation exciting field eddy current transducer belonging to the technical scope of electric eddy current detection in the field of nondestructive testing. The eddy current transducer is mainly divided into an absolute structure and a differential motion type structure; the absolute type eddy current transducer cannot easily meet small defect detection requirements; and the differential motion type transducer can be used for effectively inhibiting common mode interference signals including temperature, lift-off effect and the like, and is relatively suitable for identifying small defects. A traditional differential motion transducer exciting coil is improved and a novel transducer exciting coil is composed of a sine winding and a cosine winding; in a working process, two harmonic currents are conducted into the two exciting coils by sine and cosine given frequencies; the two exciting currents are combined to form a rotary eddy current field so that the transducer is sensitive to eddy current distributed in each direction; when no crack exists, the two eddy current fields are balanced in a detection coil; and when a test piece has defects including the cracks and the like, the balance is broken through and an induction signal is generated in a measuring coil.

The present invention relates to a computer-implemented method for 3D model database retrieval using a 3D model as a search input. The method converts the search input into a plurality of orthogonal 2D views; generates a signature for each 2D view; and then searches the 3D model database by comparing the plurality of generated signatures with signatures generated for each 3D model in the database. The signatures are compared with one another across at least two orthogonal rotations. A system for 3D model retrieval and a method and system for creating 3D model database are also disclosed.

The invention relates to the technical field of design and manufacture of hydro-cyclones, in particular to a numerical simulation and optimization method for parameters of solid-solid separation hydro-cyclones. The method mainly comprises the following operation steps: determining the basic diameter of a hydro-cyclone; determining other structural parameters of the hydro-cyclone; designing a quadratic orthogonal rotation combinative test scheme; carrying out numerical simulation and test optimization on operation parameters; designing an orthogonal test scheme; carrying out numerical simulation and test optimization on the structural parameters. In order to overcome the disadvantages and defects in the prior art, the invention provides a method for carrying out multivariable multi-target parameter optimization on the operation parameters and structural parameters of the solid-solid separation hydro-cyclones by taking separation performance of the hydro-cyclones as target, so as to simply, economically and efficiently realize the parameter optimization of the hydro-cyclones, remarkably improve the separation performance of the hydro-cyclones, improve the production efficiency, reduce the production cost and improve the product quality.

The invention relates to a novel spaceborne high-precision high-stability two-dimensional pointing mechanism. The mechanism comprises an azimuth movement mechanism and a pitching direction movement mechanism. The azimuth direction movement mechanism comprises a pointing mirror, a pointing mirror frame, a press plate, a flexible pivot assembly, a support frame and a slider-crank mechanism. The pitching direction movement mechanism comprises a pivot assembly, a fixed seat machine, and a slider-crank mechanism. The rotation of pointing mirrors around rotation shafts in the azimuth direction movement mechanism and the pitching direction movement mechanism is swinging of cranks in the slider-crank mechanisms. Rotation shafts in the azimuth direction movement mechanism and the pitching direction movement mechanism are orthogonal rotation shafts of each other and axes of the two rotation shafts are on the mirror face of the pointing mirrors. The two-dimensional pointing mechanism is characterized by high pointing precision and high system stability, a disadvantage is overcome that the pointing precision and the system stability cannot be considered simultaneously in a two-dimensional pointing mechanism in the former spaceflight optical remote sensing device, and improving of pointing and tracking precision of the spaceborne optical remote sensor is facilitated.

The invention relates to a novel two-degree-of-freedom parallel robot imitating a human elbow joint, comprising: a base, an electric push rod assembly, and a working platform. It is characterized in that: the base is used for the installation of various mechanisms, the electric push rod assembly connects the base and the working platform in parallel through the ball hinges at both ends, and the working platform rotates orthogonally through two spherical hinges and one XY Two deep groove ball bearings on the shaft are in parallel with the base. The invention has high precision, convenient operation, freedom and flexibility, and low cost.

The invention relates to a forming method of a rotatably overlaying swirler and belongs to the technical field of machining. The forming method is applicable to processing of swirlers enabling fuels and air to be fixed. Two impellers in the same blade shape are processed in a linear cutting method and are respectively subjected to spark cutting in blade shapes to process spaces and connection positions; each blade rotates in the orthogonal rotation mode in the anti-clockwise direction with the center line as the axis, and the two rotated impellers are correspondingly overlapped and horizontally rotate for 180 / n degrees with the center as the axis to lead the space between two adjacent blades to be identical; and the two impellers are fixedly welded to obtain the swirler. The forming method reduces requirements for processing technology, devices and processes, saves processing time and improves efficiency.

The invention relates to an extraction method of fault factor characteristics of an electrical power system, the method includes the following steps: a. choosing an initial variable, if a sample variance is smaller than a set threshold value, going to step b, otherwise going to step c; b. calculating a characteristic value and an unitized feature vector of the correlation coefficient matrix of the initial variable; c. calculating a covariance matrix of the initial variable, and the characteristic value and the unitized feature vector of the covariance matrix; d. if the characteristic value of the covariance matrix is smaller than the set threshold value, then going to step a, otherwise going to step e; e. calculating a common factor and a factor loading matrix of the initial variable; f. performing the orthogonal rotation or oblique rotation on the common factor; g. judging a fault element according to the coefficient feature and the scoring feature of the common factor. According to the invention, the fault factor characteristics of the electrical power system are extracted from real time measurement information in a WAMS (wide area measurement system), thus not only satisfying the requirement of a wide area back-up protection system on fault location real-time and accuracy,, but also having a strong anti-interference capability.

In a waveguide twist which provides orthogonal rotation of both direction and polarization, TE10-mode energy in waveguide W1 is coupled via iris I1 to a transformer cavity capable of exciting both TE10 and TE01 modes. The TE01 mode is coupled via iris I2 to output waveguide W2. Transformers may be interposed between one or both waveguides and their associated irises to increase bandwidth. The configuration facilitates manufacture in two halves by simple machining or casting.

The invention provides a three-degree-of-freedom surface-movable robot finger unit device, and belongs to the technical field of robot hands. The three-degree-of-freedom surface-movable robot finger unit device comprises two finger sections, four bevel gears, a left half shaft, a right half shaft, a left joint driver, a right joint driver, a left joint transmission mechanism, a right joint transmission mechanism, a longitudinal shaft, a longitudinal moving driver, a longitudinal moving transmission mechanism, a skin layer and the like. A joint double-degree-of-freedom orthogonal rotation function is fulfilled, namely the device can be bent around a joint shaft and rotate around the longitudinal shaft, and a surface longitudinal moving function is also fulfilled. The device is suitable to be mounted on a finger of a robot, functions of fingers of a humanoid robot are expanded, and in a movement process, adjacent fingers cannot intervene. The device is provided with a finger surface capable of moving multi-dimensionally, by surface movement, an object can relatively move or deform, the device is suitable for picking up objects, and is particularly suitable for picking up flat objects and deformable objects, and positions and postures of a grabbed object can be adjusted. The device is compact in structure, small in size, easy to control and suitable for being mounted on a hand of the robot.

The invention discloses an experimental research method for promoting rooting of a pomegranate. The experimental concentration is designed by comprising seven factors in five levels through a plurality of common hormones (IBA, 2,4-D (2,4-Dichlorophenoxyacetic acid), gibberellin or 920 (GA3), NAA, ABT, 6-benzyladenine or cytokinin (6-BA) and VB1) through a scientific experimental method, a computer mathematical model is set up according to different measuring results through a orthogonal rotation combination regression design method, and a method of a compound decision scheme for improving the pomegranate cottage rooting rate is screen through calculation and analysis.

In one embodiment a system and method is arranged for bridging the dead-band when asynchronous signals are compared against each other. There is developed a pair of phase related signals from one of the signals, each phase related signal phase shifted from each other, but having the same frequency as the signal from which it was derived. The other frequency signal is compared against each of the phase-related developed signals to generate an error signal which quadrature rotates when the first and second signals are out of frequency with each other. A control signal is generated when the quadrature rotation is outside a certain limit. The error signal is controllably buffered to insure that the error signal only occurs when the frequencies are offset for a selected period of time.

The invention belongs to the field of plastic coloring, and provides an optimization method for preparation of a full-biodegradable color masterbatch with high covering property. The method comprisesthe steps: biodegradable resin, a plasticizer and a pigment are put into twin screws and are granulated, temperature sensors are arranged at all areas of the extruder screws, technological parametersin the processing process are automatically collected, a response surface analysis method is adopted, a ternary quadratic regression orthogonal rotation experiment is applied to preparation technologyanalysis, the covering property is characterized by the light transmittance rate, and the regression equation is used for simulating the influence of various technological conditions (the plasticizerratio, the screw rotating speed and the temperature) on the covering property in the twin screw processing process; then the factors affecting the covering property in the process of extrusion granulation of the biodegradable color masterbatch are rapidly and conveniently obtained; next, the processing conditions can be controlled according to the influence degree to obtain the corresponding color masterbatch which conforms to the covering property condition; and finally, the best technological parameters of the biodegradable color masterbatch with high covering property can be obtained quickly in the preparation process of the biodegradable color masterbatch.

The invention relates to an environment-friendly primitive ecological green bio-adsorbent preparation method. The technical process comprises the following steps: selecting materials, sampling, slicing, boiling, pressing, filtering, rinsing to neutral, soaking with alkali, drying, pulverizing, and screening to obtain a finished product. According to the invention, the primitive ecological bio-adsorbent material is prepared from the following common domestic wastes: asparagus lettuce leaves, watermelon peels, orange peels and wheat bran; systematic research is performed on the formaldehyde adsorption rate through quadratic regression orthogonal rotation combined design to optimize formaldehyde adsorption conditions; certain achievements are got in comparison with the traditional activated carbon adsorption test research; the preparation method provides a theoretical basis for application of peels and other wastes, and provides a reference for effective purification of formaldehyde pollution in habitable rooms; and in case of going into production, the preparation method can realize waste recycling and create a win-win situation of treating wastes with processes of wastes against one another, thereby having positive meanings for realizing both circular economy development and environment protection.

The invention belongs to the technical field of inertial navigation, and particularly relates to a nine-top MEMS (micro-electro mechanical system) inertial measuring device based on orthogonal rotation. The nine-top MEMS inertial measuring device based on orthogonal rotation includes three groups of tops, namely a first orthogonal top group, a second orthogonal top group, and a third orthogonal top group, wherein the first orthogonal top group coincides with a carrier coordinate system of the device; the spatial relationship of the three groups of tops can be obtained by successive anti-clockwise rotations of the carrier coordinate system around a vector S. Compared with a nine-top octadecahedron configuration scheme in the prior art, the nine-top MEMS inertial measuring device based on orthogonal rotation provided by the invention has the advantage that any three of the tops in the device are not co-planar, and the reliability is equivalent to that of seven sets of non-redundant inertial navigation systems, so that the system reliability is further improved.

The invention discloses a solid-angle three-dimensional display possessing 2pi spherical degrees. Vertical and horizontal bidirectional parallaxes are simultaneously possessed. A visual area includes 2pi spherical degrees of an upper half portion of a screen rotation area. The display comprises a projector module, a double-sided reflection grating screen, a screen fixing rack, a transmission shaft rod 2, a bevel gear module group, a transfer bar, a horizontal rotation bottom disc, a plane gear 1, a plane gear 2, a motion detection sensor, a transmission shaft rod 1, a motor and an embedded processor. A high speed projector projects projection images of a three-dimensional object to the double-sided reflection grating screen carrying out bidirectional orthogonal rotation motion, wherein the projection images are formed through combining different angle along horizontal 360 degree and vertical 180 degree directions. An observer can observe corresponding images of the three-dimensional object of different horizontal and vertical angles around a display apparatus. By using the solid-angle three-dimensional display possessing the 2pi spherical degrees, many persons can simultaneously watch a displayed three-dimensional object content by using naked eyes through multiple angles.

The invention relates to a compensation instruction current obtaining method, device and equipment suitable for a single-phase low-ripple PWM rectifier of a station DC system. The method comprises thesteps: obtaining a power grid current, a power grid voltage and a DC side voltage at a current moment; obtaining an angular frequency value and a phase value of the power grid voltage at the currentmoment by utilizing a phase-locked loop of a single-phase active filter; virtually constructing a two-phase orthogonal rotating coordinate system, and calculating the input active power and reactive power of a current PWM rectifier; and obtaining a compensation instruction current at the current moment according to the current rectifier input active power and reactive power. Therefore, the activepower and the reactive power are input by using the rectifier, so that the algorithm for obtaining the compensation instruction current is simpler, and the precision and the compensation effect of theobtained compensation instruction current are improved.

The invention discloses low elasticity modulus novel medical zirconium alloy and a designing method thereof. The low elasticity modulus novel medical zirconium alloy disclosed by the invention is prepared from the raw materials in atomic percent: 0.1at.% to 3at.% of tin, 3at.% to 5at.% of copper, 0.1at.% to 15at.% of niobium and the balance of zirconium. The designing method of the low elasticitymodulus novel medical zirconium alloy comprises the steps: utilizing a quadratic regression orthogonal rotation combination design to perform ingredient design to obtain an experiment scheme; then converting atomic percent of all alloy elements in the scheme into weight percentage to obtain a weight ratio scheme; performing alloy preparation, a compression experiment and further phase analysis anda microscopic structure observing experiment according to the weight ratio scheme obtained from the combination design; then utilizing SPSS to analyze experiment results and finally obtaining a mathematic model of alloy performance and alloy elements. The zirconium alloy designed out according to the mathematic model has the advantages of low elastic modulus, moderate compression strength and yield strength, high elastic energy and ability in meeting a requirement of clinical medicine to an implant material.

A method of dividing irradiance regions based on rotated empirical orthogonal function includes following steps. A standardized matrix averaging on annual total radiation amount data is performed. An empirical orthogonal function decomposition on an annual total radiation variable field matrix is performed based on the standardized matrix averaging result of the annual total radiation amount data. A variance contribution rate and an accumulative variance contribution rate are calculated by rotating a load matrix and a factor matrix according to a varimax orthogonal rotation principle based on the empirical orthogonal function decomposition result of the annual total radiation variable field matrix. The irradiance regions are divided according to results of the variance contribution rate and the accumulative variance contribution rate.

The invention provides a method for preparing egg-chicken feeds by utilizing lactobacillus fementation, which belongs to the field of poultry animals feeds, and uses corns and mixed meal as raw materials, and applies lactobacillus fementation to prepare egg-chicken feeds. The method for preparing the egg-chicken feeds by utilizing the lactobacillus fementation designs and tests through a quadratic regression orthogonal rotation combination design method, builds an orthogonal regression model, analyzes the orthogonal regression model to obtain fermentation parameters of lactic acid bacteria for preparing high lactic acid bacteria egg-chicken feeds, microbial strains which are used during fementation of lactic acid bacteria are mixed bacteria of lactobacillus plantarum and lactobacillus acidophilus, the volume radio of the lactobacillus plantarum and the lactobacillus acidophilus in the mixed bacteria is 1:1, and the number of lactic acid bacteria in the mixed bacteria in each milliliter is not lower than 108. The method for preparing the egg-chicken feeds by utilizing the lactobacillus fementation obtains the fermentation parameters of the lactic acid bacteria for preparing the high lactic acid bacteria egg-chicken feeds by building the orthogonal regression model, and improves number of live bacteria of the lactic acid bacteria in the egg-chicken feeds.

The invention discloses a four-order tensor joint diagonalization algorithm for joint blind source separation of four data sets. The method comprises the following steps: S1, observation signal: pre-whitening the observation signals of the four data sets respectively; S2, target tensor: after the pre-whitening, constructing a set of mutual four-order cumulant tensors; S3, initializing a factor matrix; and S4, cost function convergence calculation: if the algorithm converges after once scanning, the calculation ends, if the algorithm still does not converge, then, the factor matrix obtained bythe present update is used as an initial value, and the next scanning is performed, a Jacobian rotation matrix is traversed and updated to update the factor matrix until convergence. According to thefour-order tensor joint diagonalization algorithm for joint blind source separation of four data sets, the algorithm is based on orthogonal rotation transformation, thereby an optimal solution in thesense of least squares can be obtained, and the algorithm is a J-BSS method for no more than four dataset signals.

The invention discloses a DC modulation quantum key distribution phase decoding method, device and system based on polarization orthogonal rotation. The method comprises the steps: splitting one incident input optical path in any polarization state into two optical pulses, and performing the phase decoding of the two optical pulses. The phase decoding of each pulse comprises the steps: splitting the optical pulse into two sub-optical pulses; transmitting the two sub-optical pulses on two sub-optical paths, and combining the two sub-optical pulses for outputting, wherein at least one of the twosub-optical paths comprises at least one polarization orthogonal rotation device, and the difference between the phase differences, transmitted through the two sub-optical paths, of two cross-polarization states of the optical pulse is controlled to be an integer multiple of 2*pi, and the DC phase modulation of one of the two sub-optical pulses obtained through the splitting of the optical pulseis performed. According to the decoding scheme, the method can resist the polarization-induced decay, and is suitable for a high-speed quantum key distribution system with environmental interference.

The invention provides a time phase decoding device and a quantum key distribution system comprising the same. The time phase decoding device comprises a beam splitter, two polarization orthogonal rotation reflection devices which are optically coupled with the beam splitter through two arms respectively, a phase modulator and a single single-photon detector. Each reflection device includes a polarization beam splitter having an input port and two output ports, and is coupled to a respective arm via the input port. The two output ports are optically coupled to each other via a transmission optical path including a polarization quadrature rotation device. The single photon detector is coupled to one of the ports of the beam splitter that are not coupled to the two arms for detecting signalsof a first time slot, a second time slot and a third time slot that are consecutive in one pulse period. And the phase modulator is arranged at the front end of the beam splitter, on one of the two arms or on a transmission light path of one reflection device. According to the scheme, polarization-induced fading can be resisted, and the safety problem generated by multiple detectors can be eliminated or reduced.

The invention discloses a method for measuring carbon content of fly ash in a power station boiler. The method is characterized in that 1, combustion factors influencing the carbon content of fly ashare decomposed into hot wind temperature factor, burnout factor, primary air pressure factor and coal quality factor; 2. according to the orthogonal rotation, a factor component matrix after the maximum variance orthogonal rotation is used to obtain the influence weight of four factors; and a factor analysis model is established for the carbon content of fly ash. Compared with other modeling methods, the modeling method is not constrained by algorithms, and the practicability is stronger in a DCS system; data is more comprehensive than other single algorithms; compared with hardware measurement, the adaptation of parameters is stronger; the method has the advantages of advancement, high sensitivity, good stability, high measurement accuracy, strong universality and the like, and can be widely used in electric power and other fields.

A Quantum Key Distribution Time Bit-Phase decoding method and apparatus and corresponding system Based on Polarization Orthogonal Rotation. The method comprises the following steps of: splitting an input optical pulse into a first optical pulse and a second optical pulse; performing phase decoding on The first optical pulse, and performing time bit decoding on the second optical pulse. Phase decoding of the first optical pulse includes splitting the first optical pulse into two sub-optical pulses transmitted on two sub-optical paths, At that same time, At least one sub-optical path comprisingat least one polarization orthogonal rotating mean, controlling The two orthogonal polarization states of the first optical pulse to differ from each other by an integer multiple of the phase difference 2Pi between the two sub-optical paths in the process of beam splitting to beam combining, and performing phase modulation on the first optical pulse before beam splitting or performing phase modulation on one of the two sub-optical pulses in the process of beam splitting to beam combining. The invention can realize the time bit Phase-coded quantum key distribution scheme for achieving environmental interference immunity..

The invention, which belongs to the technical field of confocal microscopic imaging, spectral detection and laser inertial confinement nuclear fusion, discloses a laser-differential-confocal-technology-based method and device for comprehensively measuring morphological performance parameters of a nuclear fusion pellet. According to the invention, on the basis of combination of the laser differential confocal technology with the Raman spectroscopy detection technology, precision tomography focusing fixing is carried out on inner and outer surfaces of a laser fusion pellet shell layer by using the laser differential confocal technology; spectral excitation detection is carried out on the shell and interface of the pellet by using the Raman spectroscopy detection technology; and on the basisof the orthogonal rotation driving technology, three-dimensional rotation driving is performed on the pellet to obtain three-dimensional shape parameters of the inner and outer surfaces of the pelletand shell / interface performance distribution parameters, thereby realizing comprehensive measurement of the morphological performance parameters of the nuclear fusion pellet. Therefore, the data baseand detection way are provided for the laser inertial confinement nuclear fusion simulation experiment research, pellet preparation process research and pellet screening. The laser-differential-confocal-technology-based method and device have the broad application prospects in the fields of laser inertial confinement nuclear fusion, high energy physics and precision detection.

The invention provides a method for inhibiting alkali activity of concrete aggregates. The method comprises doping chemical additives and / or mineral admixtures into concrete, wherein the chemical additives are a high-efficiency water reducer and an air entraining agent, and the mineral admixtures are coal ash and silica fume, and the water-cement ratio is controlled. The doping amount range of single doping and the mixing proportion of mixed doping are determined through experiments, so that the relation between doping amounts of various materials and the expansion rate of base aggregates is determined. In the method, four materials comprising the fly ash, the silica fume, the high-efficiency water reducer and the air entraining agent are determined to serve as a part of concrete components, and a reasonable matching ratio of the materials is determined through single-factor tests and a five-factor quadratic orthogonal rotation combined test method, so that an effective reference measure is provided for prevention of reactions of alkali aggregates in the engineering, inhibition of alkali-silica reactions (ASR) is effective for a long time, and engineering damage caused by the reactions of the alkali aggregates is reduced.