63results about How to "Theoretical perfection" patented technology

The invention provides an interactive image segmentation method for multiple foreground targets. The method comprises the following steps of: performing linear reconstruction on pixel colors in an image local window, and repeatedly modifying color reconstruction coefficients by using linear projection; repeatedly performing the linear reconstruction on pixel class label vectors in the image localwindow by using the modified color reconstruction coefficients, and estimating to acquire local reconstruction errors; accumulating the local reconstruction errors to acquire a global reconstruction error; building an interactive image segmentation model of the multiple foreground targets; and performing cluster analysis on the same class of pixels which are labeled by a user to acquire a clustering center; acquiring a group of polynomial functions by adopting regression estimation by taking the clustering center as a training sample; mapping the unlabelled pixels by using the polynomial functions to acquire an initial solution; solving the segmentation model; and determining the class attribution of the unlabelled pixels, and outputting a segmentation result. The interactive image segmentation method has a wide application prospect, and the problem that the multiple foreground targets are difficult to segment simultaneously in the prior art is solved.

The invention discloses an optimal control method based on a data-driven single network structure. By continuously updating training samples and adding to an LS-SVM model, the partial derivative of a system state variable x for the optimal performance index function is approximated on line, and then the optimal control law is directly obtained by calculation according to the optimal control law expression. In this way, the controller network is saved, so that the structure becomes simpler. In addition, the calculation procedures involved in each iteration of the traditional computing method are reduced, thereby increasing the execution speed.

The invention discloses a decryption and recovery method of document object model (DOM) raster data, and belongs to the field of geography information safety. The decryption and recovery method of the DOM raster data comprises the following steps of (1) a key generation process: confirming a data range, confirming data conversion amount, computing linear and nonlinear transformation parameters; (2) a decryption process: reading a key file, processing each pixel according to the key file, and saving raster data after decryption; and (3) a recovery process: opening the raster data after decryption, and processing each pixel in a circular mode. Aiming at a safety protection problem of the DOM raster data, the decryption and recovery method of the DOM raster data is capable of carrying out decryption to the data according to the key under the premise of ensuring that no change occurs in a data topological relation, and the data after decryption can be recovered according to the key. The decryption and recovery method of the DOM raster data has the advantages of having randomness, gradual change property, reversibility and the like, improving reliability of decryption of the DOM raster data, completing a theory and method system of geographic information safety protection, and being applicable to public release of the DOM raster data, and the like.

The invention discloses an SAR back projection imaging method based on feature distance subspace. The method is on the basis of distance history vector, and the concept of distance history vector match degree is put forward from the angle that whether a conventional BP algorithm can focus; and then, based on minimum mean square error criterion and principal component analysis principle, the concept of feature distance subspace is put forward in the SAR imaging field. The measured distance history vector is optimally corrected in the feature distance subspace, so that measurement noise is suppressed very well, the distance history vector match degree is improved, compensated phase position is subjected to accurate estimation, and finally, good focusing effect is obtained. The SAR back projection imaging method is suitable for SAR two-dimension imaging and three-dimensional imaging of any system, and thus the method has very good popularization performance. Finally, since correcting the distance history vector in the feature distance subspace is a linear operation, the method has very high operability.

The invention discloses a cyber-physical fusion-oriented building information model (BIM) expansion method. The method is used for building construction and operation and maintenance process measurement and control based on a BIM, construction of application software platforms of augmented-reality human-machine interaction and the like and the like, and realizes coupling, linking and state consistency between BIM entities in virtual space and physical building entities in real space. According to the method, a BIM framework based on an IFC (Industrial Foundation Class) is expanded on the basis of conception and thinking of cyber-physical systems (CPS), four new object entities are defined inside the traditional BIM framework, the four objects are associated with other building objects (such as doors) in the BIM framework through related connection mechanisms, the virtual building objects are enabled to have perception, decision-making, control and animation ability, and dynamic interaction to physical building objects is realized. The method accords with application requirements of BIM technology for future dynamic interaction processes, and is compatible with mainstream BIM technology standards.

The invention discloses a method for determining an initial orbit of a spatial target under the constraint of a virtual coplanar condition, and belongs to the field of surveying and mapping science and technology. The method comprises the steps of extracting a fixed star trail equation based on a star map, and carrying out motion compensation on an observation platform by utilizing a six-parameteraffine transformation model to acquire image plane coordinates of a target star under a virtual static observation condition; by utilizing an imaging geometrical relationship between the observationplatform and the target star which are coplanar under the virtual static observation condition, building a virtual static coplanar condition observation model, and calculating a spatial position of the target star; and establishing a time-space domain combined initial orbit determination algorithm, and calculating the number of target orbits. The virtual static coplanar condition observation modelconverts the "dynamic-to-dynamic" orbit estimation problem into the "static-to-dynamic" satellite dynamic photography measurement problem, and solves the difficult problem of no distance measuring data in detection of a space-based visible light camera (SBV).

The invention provides a residual moment measuring device and method of an inertial device based on three-dimensional air flotation, belonging to the technical field of detection. An on-stage system and an under-stage system in the device are connected through a wireless transmission system; the under-stage system comprises an under-stage data collecting and processing system, a server, a cabinetbox and an air supply system; the on-stage system comprises a power supply system, an inertial execution mechanism control system, an inertial execution mechanism to-be-tested product, an on-stage data collecting and processing system, a residual moment test system, a vibration isolating and supporting system, and a vacuum control system, the residual moment test system consists of an air flotation rotary table, a high-precision sensor device and an anti-overturning and protective device, and the high-precision sensor device is separately arranged in a vertical direction of the air flotation rotary table and in a horizontal direction outside the air flotation rotary table. The device can simulate orbit work of a satellite platform, provides a simulated spatial mechanical environment, outputs residual moment in real time, can be used for directly measuring multiple inertial devices, is low in calculation amount, and has high precision.

The invention discloses an urban electric bus driving condition construction method based on improved K-means, and the method comprises the following steps: A, carrying out the investigation of bus routes in a city, and screening a plurality of typical bus routes; step B, adding a sensor on the selected bus to obtain required data: time information-vehicle running speed; step C, preprocessing theacquired data; step D, dividing a short stroke and calculating a characteristic value; e, performing data dimension reduction through principal component analysis; step F, carrying out improved binaryK-means clustering analysis; and step G, selecting similar working conditions and synthesizing driving working conditions. An analysis result shows that the driving condition of the electric motor coach in a certain city established based on the improved binary K-means algorithm can more accurately reflect the characteristics of urban road traffic.

The invention relates to a planet row gear structure reducer which comprises a mechanical system, a lubricating system and the like. The reducer includes a single-row bevel gear planet row or a single-row variable-line-speed planet row with the characteristic parameter close to 1.0, wherein the motion characteristic equation of the single-row bevel gear planet row or the single-row variable-line-speed planet row is that Nt-axNq-(1-a)xNj=0. The reducer has a specific transmission path, the transmission path or a heterogeneous type of the transmission path with the corresponding transmission ratio formula having the denominator subtraction property is selected, the value of the planet row characteristic parameter is adjusted by selecting the planet row kind structure type and adjusting the number of teeth of three parts of the planet row, the denominator subtraction property can be utilized so that the transmission ratio formula denominator absolute value can be minimized, the member absolute value is not minimized, the transmission ratio absolute value is maximized, and therefore the reducer with the large transmission ratio is achieved. The reducer can serve as an independent reducer and accelerator or serve as a part in a transmission machine.

The invention provides a prevention and treatment method for water inrush and sand bursting of a thick surface soil thin bedrock drilling shaft. The method comprises the following steps: throwing: throwing bagged stones or bricks into the shaft with water inrush and sand bursting, and throwing stone ballast with the particle size of 20-40mm into the shaft with water inrush and sand bursting when the water level rises slowly or is stable; grouting: forming a plurality of exploration injection holes in the periphery of the shaft with water inrush and sand bursting for grouting, and forming a grouting curtain; freezing: forming a plurality of freezing holes around the shaft with water inrush and sand bursting to freeze the thick surface soil thin bedrock around the shaft with water inrush andsand bursting and form a freezing wall; repairing: draining and dredging the shaft with water inrush and sand bursting, and repairing the damaged well wall; and prevention: sleeving an inner sleeve well wall in the shaft with water inrush and sand bursting. The prevention and treatment method takes repair and prevention as the principle, the aim of stability of the damaged drilling shaft for a long time is achieved, and the social and economic benefits are remarkable.

The embodiment of the invention relates to the technical field of coal mining engineering, in particular to a deep-hole coal blasting method for a manless working face of a steeply dipping coal seam.The deep-hole coal blasting method comprises the steps: at the positions of solid coal walls of an upper-zone roadway and a lower-zone roadway at the depth away from a coal working face by single-timeblasting cyclical footage, a plurality of blast holes with predetermined depths are drilled obliquely inwards from the coal walls, wherein the multiple blast holes are consistent with the dip angle of the coal seam; after drilling is completed, casings are sent into drill holes within the predetermined time; according to the pre-calculated single-hole explosive load and a determined explosive loading mode, explosive coils are loaded into predetermined positions of the blast holes, explosion propagation lines are led out to be connected to an initiation point, and the blast holes are blocked through blocking gun clay; and an initiator is started, the explosive coils in the multiple blast holes are initiated simultaneously, and coal bodies at the single-time blasting cyclical footage depthare guided to move to be broken through a plurality of blasting free faces to achieve coal dropping. The deep-hole coal blasting method can be suitable for mining the steeply dipping coal seam and provides a comprehensive theory and a practical guiding basis for later production and mining of the steeply dipping coal seam.

The invention provides a method for measuring the size of a caved body obtained through non-sill-pillar sublevel caving mining. The size of the caved body is determined according to the size of an ore body which is exploded and the one-time coefficient of volumetric expansion. The method comprises the steps of firstly, measuring the sublevel height, the access space, the ore caving pace, the width of the cross section of a tunnel and the height of the cross section of the tunnel respectively, and working out the size of the ore body which is exploded according to stope structure parameters; secondarily, conducting site measurement and laboratory measurement respectively, determining the volume weight of discharged ore scattered bodies and the volume weight of the ore body which is exploded, and working out the limit loose coefficient of the discharged ore scattered bodies; then, according to the ore drawing principle, conducting empirical value taking on the secondary loose coefficient of ore inside the caved body, and determining the primary loose coefficient of the caved body by combining the limit loose coefficient of the drawn ore scatter bodies; at last, determining the size of the caved body according to the primary loose coefficient and the size of the ore body which is exploded. The method has great significance in further study of caved body forms, structure parameter optimization, stope preparation workload reduction and full recovery of ore resources.

The invention provides a semi-trailer tractor working condition construction method, which comprises the following steps: dividing market fields by using driving characteristics of various semi-trailer tractors, collecting driving data of the semi-trailer tractors in a target field, and establishing a kinematics fragment database in the field; calculating characteristic values of all kinematics fragments, and obtaining dimensionless indexes after standardization processing; performing de-correlation and dimension reduction processing on the dimensionless indexes by using a principal component analysis method to obtain principal component values of all kinematics fragments; clustering all the kinematic fragments according to the principal component values, and segmenting the time of the representative working condition according to the proportion of each cluster in all the kinematic fragments; selecting kinematics fragments meeting representative working condition segmentation time from each cluster for random combination, and screening candidate working conditions from all combinations according to speed-acceleration joint probability distribution and characteristic values of all the combinations; and through analogue simulation, selecting one candidate working condition from the two candidate working conditions as a representative working condition of the target field.

The invention discloses an aramid fiber modification method. According to the aramid fiber modification method, aramid chopped fibers is modified by using an aramid nanofiber dispersion liquid so as to construct a multi-level micro/nano coarse structure on the smooth surface of the aramid fibers to obtain aramid nanofiber-coated aramid composite fibers which have high specific surface area, high mechanical strength and excellent temperature resistance, can overcome the problems of smooth and hydrophobic surface, strong inertia, few active groups and the like of a traditional chopped fiber and become an optimal construction unit for preparing a high-performance composite material. High-performance aramid paper is prepared by taking the obtained aramid nanofiber-modified aramid chopped fibers as a single raw material, and aramid pulp fiber or aramid fibrid does not need to be prepared, so the problems of loose paper structure, poor interface bonding force, low mechanical strength and compression strength and the like caused by large component dimension difference of the aramid paper are avoided; and the prepared aramid paper has a compact paper structure, high strength, high modulus and excellent compression strength, and is expected to be applied to the fields of advanced electrical insulation, structural weight reduction honeycomb materials and the like.

The invention relates to a plug valve. A cylindrical plug body or a conical plug body does unidirectional turnover movement other than reciprocating rotation relative to the valve body; in relative turnover, an opening-closing pair is formed by the plug body and through holes of the plug body which are capable of mutually forming opening-closing movement on the same radial-direction cross sectionand the valve body and through holes of the valve body which are capable of mutually forming opening-closing movement on the same radial-direction cross section, the opening-closing pair can form periodic opening-closing movement in turnover, and is used for periodic opening-closing control of fluid, and the turnover-type plug valve can have one or more opening-closing pairs. The turnover-type plug valve can also be designed to a multi-pair synchronous turnover-type plug valve and a distribution turnover-type plug valve.

The invention relates to an airlift reactor for treating soybean oil refining waste water by viscid trichosporon cutaneum, and belongs to the technical field of waste water treatment. Aiming at the features of the soybean oil waste water, the airlift reactor which can not only realize the soybean oil refining waste water treatment and resource utilization but also obviously improve the waste watertreatment efficiency for treating soybean oil refining waste water by viscid trichosporon cutaneum is designed. A water bath jacket is coated outside a reaction tank; a heat insulation water inlet and a heat insulation water outlet are formed in the water bath jacket; a tube body is arranged inside the reaction tank body through a support block, wherein the upper part and the lower part of the tube body are communicated with the reaction tank body; the upper half part of the tube body is a low pH region; the lower half part is a high PH region; an air pipe passes through the reaction tank body and the air outlet of the tube body is arranged between the low PH region and the high PH region; in addition, the air outlet is upward; a gas distributor is arranged in an air outlet position of the air pipe; a cyclone plate is arranged at the upper end of the tube body. The air is used as thrust for realizing a multi-flow-phase reactor realizing the water circulation flowing and no need of mechanical stirring and pump lifting. The airlift reactor has the characteristics of simple structure, low energy consumption and the like, and can be widely applied to various fields of biological engineering, energy chemical industry, environment protection and the like.

The invention provides a maintenance effect modeling method considering a maintenance negative effect. The method comprises the following steps of 1, determining a system reliability model; 2, quantitatively describing a maintenance effect; 3, establishing a system maintenance effect model; 4, carrying out application and analysis of a maintenance effect model: applying the established maintenancemodel considering the maintenance effect to a maintenance decision, performing the maintenance decision on the system by adopting a maintenance strategy limited by a fault threshold, and analyzing amaintenance decision result. By means of the steps, the maintenance effect is fully considered in the maintenance modeling process, quantitative calculation and analysis are conducted, maintenance decisions are more scientific and accurate, then the optimal efficiency-cost ratio of the system is achieved, and operation and maintenance work of enterprises is facilitated.

The invention provides an inertial device residual moment measurement device and method and belongs to the technical field of detection. The device comprises an on-platform system, an off-platform system and a wireless transmission system, wherein the on-platform system and the off-platform system are wirelessly connected through the wireless transmission system; the off-platform system comprisesan off-platform data acquisition and processing system, a server and a cabinet box; and the on-platform system comprises a power supply and gas supply system, an inertial execution mechanism control system, an inertial execution mechanism to-be-measured product, an on-platform data acquisition and processing system, a residual moment testing system, a vibration isolation and support system and a vacuum control system, and the residual moment testing system comprises an air flotation platform, air feet and a high-precision sensing device. On-orbit work of a satellite platform can be simulated,a space mechanical environment for simulation is provided, residual moment is output in real time, and the device and the method are applicable to direct measurement of multiple inertial devices and are smaller in calculation of numerical values, higher in accuracy and perfect in theory.

The invention relates to a test data reduction method for communication coverage of a parallel program, and provides a test data reduction method based on a dominant relationship aiming at the problem of communication coverage test data generation of the parallel program, so that the test efficiency is improved. The method comprises the following specific steps: (1) constructing a domination relation graph of parallel program communication statements based on a domination relation; (2) performing group division on the communication statements according to the domination relation graph to obtain communication statement groups; (3) sorting the communication statement groups; (4) dividing the communication statements in the communication statement group to obtain a communication statement queue; (5) constructing a fitness function of a communication queue based on the fitness function of the communication statement; and (6) generating test data covering the communication queue through a genetic algorithm, thereby achieving the purpose of reducing the test data.

The invention discloses an application of fusion peptide in the preparation of malignant lymphoma radioactive target molecule imaging agent and/or radioactive target therapeutic agent and a radioactive target molecule imaging agent and/or target therapeutic agent. The fusion peptide is obtained by connecting the framework region 2 (VHFR2 or VLFR2) of a monoclonal antibody heavy-chain variable domain (or light-chain variable domain) with the complementary determining region 1 or 3 (VHCDR1 or VHCDR3) of a heavy-chain variable domain and the complementary determining region 1 or 3 (VLCDR1 or VLCDR3) of a light-chain variable domain, the molecular weight of the fusion peptide is 3-4kDa, the monoclonal antibody is a monoclonal antibody for identifying EB virus surface antigen g p 350/220 antigenic determinant, and the tumor is malignant tumor caused by the EB virus. The radioactive immune-imaging agent or therapeutic agent prepared in the invention has the advantages of small molecular weight, high tumor penetrating power, good targeting, high tumor accumulation, fast removing performance in blood, no obvious radioactive distribution in non-target organs away from tumor such as the liver and spleen, no immunogenicity, safety and the like.

The invention discloses an asphalt mixture accumulation type steam motion parameter detection device comprising a closed cavity, a magnetic suspension balance, a sample barrel, a constant-temperaturecirculating bath A, a steam supply system and a vacuum pump; the magnetic suspension balance and the sample barrel are both arranged in the closed cavity, and the sample barrel is suspended on a hookbelow the magnetic suspension balance; the constant-temperature circulating bath A is arranged on the periphery of the closed cavity and is used for controlling the temperature in the closed cavity; the sealed cavity is provided with a gas inlet and a gas outlet, and the gas inlet and outlet respectively communicate with the steam supply system, the vacuum pump and a pressure return pipeline through a first pipeline. The invention further discloses an asphalt mixture steam motion parameter detection method, and the steam motion parameter in the asphalt mixture can be accurately and rapidly determined. The device and the method in the invention have the beneficial effects that the "air permeability" and "water retention" capability of the asphalt pavement under the actual service environment can be accurately and quickly quantified; and the rationality, the test precision and the test time of the test method are all remarkably improved compared with the existing test method.