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85 results about "Domain space" patented technology

A domain name is an identification string that defines a realm of administrative autonomy, authority or control within the Internet. Domain names are formed by the rules and procedures of the Domain Name System (DNS). ... Every domain name ends with a top-level domain label. When the Domain Name System was devised in the 1980s, the domain name space was divided into two main groups of domains.

Knowledge discovery method of crowd trampling behavior evolution under disaster condition

The invention relates to a knowledge discovery method of crowd trampling behavior evolution under a disaster condition. The method comprises the following steps that: 1) crowd trampling scene element features are extracted, simulation is carried out in an intelligent crowd evacuation model, so that trampling evolution behavior features in an evacuation process are obtained, and the discourse-domain object set of a discourse-domain space layer is constructed; (2) rough set attribute discretization is performed on the crowd trampling scene element features and the trampling evolution behavior features; 3) a trampling evolution mechanism knowledge expression of a ''condition-decision'' two-dimensional information pattern is established, and knowledge reduction is performed on the trampling evolution mechanism knowledge expression; 4) a meta-rule library is generated according to the trampling evolution behavior features; and 5) the meta-rule library and evacuation instances are loaded, so that the generalized rule library of trampling evolution is generated. Compared with the prior art, the method of the invention can realize the automatic knowledge discovery of a crowd trampling behavior evolution mechanism through the classical rough set theory and can assist in solving the problem of the lack of knowledge of the crowd trampling evolution mechanism.
Owner:TONGJI UNIV

Discrete gradually color-changed chromatography constructed by coupling and mixing trichromatic fibers and spinning of gradually color-changed yarns

ActiveCN110424082AAchieve secondary color matchingDrafting machinesYarnFiberYarn
The invention relates to discrete gradually color-changed chromatography constructed by coupling and mixing trichromatic fibers and spinning of gradually color-changed yarns. Based on the mass of thetrichromatic fibers, increasing and decreasing mass sequences are constructed, a combination pair is used as a trichromatic fiber mass coupling and mixing and gradient mixing model. Based on the model, the discrete gradually color-changed chromatography of the trichromatic fibers and a draft ratio discrete algorithm for spinning of discrete gradually color-changed yarns are constructed. The discrete gradual change effect of the color of the yarns based on coupling and mixing of three primary colors is achieved, the yarns which have discrete gradually changed colors and have color serializationcharacteristics are spun, or gradually color-changed yarns with a natural gradient color effect on one yarn are spun. Therefore, based on the coupling mass ratio among the trichromatic fibers, secondary color matching among the multi-primary color fibers can be efficiently realized, discrete gradually changed serialized colors and discrete gradually changed colors in a full-color domain space canbe obtained, and colored yarns with different discrete gradually changed colors corresponding to fibers in three colors are obtained accurately.
Owner:YUYUE HOME TEXTILE

Motion image-electroencephalograph (MI-EEG) recognition method based on brain-derived domain space

The invention discloses a motion image-electroencephalograph (MI-EEG) recognition method based on brain-derived domain space. The recognition method comprises the steps as follows: performing common average reference and band-pass filtering and other preprocessing on acquired MI-EEG; performing inverse transformation on the EEG by standardized low-resolution brain electromagnetic CT algorithm to obtain a brain-derived domain dipole moment amplitude time sequence; primarily selecting dipoles on the basis of dipole moment amplitude by a data driven method, performing time-frequency analysis on the dipoles by continuous wavelet transform to select dipoles and determine optimal time period; and extracting dipole wavelet coefficient powder sequence characteristics by a one-to-one common spatialpattern algorithm, and inputting the characteristics in a support vector machine for classification. The time domain, frequency domain and spatial domain information are fully utilized in optimization of dipoles, determination of optimal time period and characteristic extraction while the spatial resolution is improved, and the method has great significance in improving calculation efficiency andclassification accuracy.
Owner:BEIJING UNIV OF TECH

Visual perception correction image compression method based on DCT transform

The invention proposes a visual perception correction image compression method based on DCT transform. The method is used for lossy compression of an image, and comprises the following steps: firstly, converting the image into a Ycrcb format via domain space transformation; secondly, decomposing the image into 8x8 image subblocks, and performing DCT transform on each image subblock; thirdly, in a DCT coefficient of each subblock, processing the coefficient through a judgment method and then decomposing the coefficient into a high frequency coefficient and a low frequency coefficient, wherein an error compensation mechanism is adopted for the high efficiency coefficient and visual perception correction transformation is performed on the low frequency coefficient, and then encoding; and finally, the process of reconstructing the image is an inverse operation of the compression process. Through the method of the invention, the image can not only get a higher compression ratio, but also the compression efficiency of the image is not reduced due to the increase of the amount of calculation; and meanwhile, the reconstructed image is analyzed, the image restoration degree is increased, the signal to noise ratio is enhanced, and the image restoration quality is obviously improved, therefore, the visual perception correction image compression method based on the DCT transform provided by the invention has strong practicability.
Owner:SICHUAN YONGLIAN INFORMATION TECH CO LTD

Blueberry root domain space covering cultivation method

The invention discloses a blueberry root domain space covering cultivation method which comprises the steps as follows: adopting a planting furrow covering method or a planting hole covering method, covering the interior of the planting furrow with crop straws, sawdust or pine needles, laying microporous permeable non-woven fabrics on all walls and the bottom of the planting furrow, and using plastic films to partition the non-woven fabrics on all walls of the planting furrow, planting blueberry seedlings, wherein the root system of the blueberry seedlings cannot penetrate through the non-woven fabrics, filling the nutrient soil to the planting furrow and performing fix planting of the blueberry seedlings, and covering overground parts of the blueberry seedlings after fixing planting with the crop straws, sawdust or pine needles with certain height, wherein the pH value of soil is stabilized within the range of 4.5-5.7. Therefore, the blueberry root domain space covering cultivation method is simple to operate, the purpose of improving blueberry planting soil can be achieved only with lower cost, the influence on growth of blueberries due to inappropriate soil conditions is avoided, the soil has favorable permeability, the blueberries grow well, the fruit quality is improved, and the blueberry root domain space covering cultivation method is very conducive to production of organic fruit products and expansion of planting range of the blueberries.
Owner:HEBEI NORMAL UNIVERSITY OF SCIENCE AND TECHNOLOGY

Timing synchronization method under high-speed mobile condition

The invention relates to a timing synchronization method under a high-speed mobile condition. The timing synchronization method under the high-speed mobile condition includes the steps: 1, constructing space base vectors of right crossing angle domains, 2, carrying out projection on the right crossing angle domains of received signals, 3, carrying out rough timing synchronization on the right crossing angle domains, 4, carrying out equivalent Doppler estimate and compensation on the right crossing angle domains, 5, carrying out fine timing synchronization on the right crossing angle domains, and 6, carrying out fine synchronized signal combination and timing judgment on each right crossing angle domain space. According to the timing synchronization method under the high-speed mobile condition, the process of timing synchronization is divided into the rough timing synchronization and the fine timing synchronization, reference synchronization frame header is adopted to carry out frame timing synchronization, and the reference synchronization frame header comprises Q short training sequences with the cycle length of D and one long training sequence with the length of K. A first part of the reference synchronization frame header is mainly used for the rough timing synchronization and frequency synchronization, and a second part of the reference synchronization frame header is mainly used for the fine timing synchronization. When the timing synchronization method under the high-speed mobile condition is used for frequency offset estimation, acquired estimate range is large, estimate accuracy is high, and the function of noise suppression of a synchronizing system can be further improved.
Owner:HANGZHOU DIANZI UNIV

Carbon nanometer ring and preparation method thereof

The invention relates to a carbon nanometer ring and a preparation method thereof, and belongs to the technical field of carbon nanometer materials. The carbon nanometer ring consists of a single layer or a plurality of layers of carbon rings, and the carbon rings have a structure which is similar to a closed ring body coiled by a graphite flake layer; and axial sizes and radial sizes of the carbon nanometer ring are a nanometer order, and the axial sizes are smaller than the radial sizes. The invention also provides a method for preparing the carbon nanometer ring. The method comprises the following steps of: roasting long-chain alkyl anions and a lamellar double-hydroxyl composition metal oxide of a carbon source molecular intercalation in the inertia or reducing atmosphere, growing thecarbon nanometer ring in interlaminar restricted domain space under the catalytic action of laminate metal elements, and removing metal and the metal oxide by acid dissolution to obtain the carbon nanometer ring. By the method, the axial sizes and radial sizes of the carbon nanometer ring and the layer number of the carbon ring can be controlled effectively. The carbon nanometer ring has a nanometer ring structure and the excellent performance of carbon materials, has more edge carbon and dangling bonds, and has a bright application prospect in fields of nanometer devices, energy storage, sensing and the like.
Owner:BEIJING UNIV OF CHEM TECH

Preparation and application of chromotropic acid intercalated hydrotalcite composite material

The invention belongs to the technical field of preparation of inorganic composite materials and specifically relates to a chromotropic acid intercalated hydrotalcite composite material, as well as a preparation method and an application thereof. The chemical general formula of the chromotropic acid intercalated hydrotalcite composite material disclosed by the invention is (M2+1-xM3+x(OH)2)x+(A2-)x/2. mH2O, wherein M<2+> is Zn<2+> or Mg<2+>, M<3+> is Al<3+>, and M<2+> and M<3+> are positioned on a hydrotalcite main body layer plate; A<2-> is interlayer chromotropic acid anion C10H6O8S2<2->; x is the molar ratio value of M<3+>/(M<2+>+M<3+>), and x is not less than 0.2 and not more than 0.33; and m is the number of interlayer water molecules, and m equals to 3-6. According to the preparation method disclosed by the invention, a nucleation/crystallization separation method is adopted for inserting chromotropic acid anions between hydrotalcite layers, and alkaline hydroxyl groups on the surface of the hydrotalcite layer plate are further utilized for promoting heavy metal ion precipitation, so that the adsorption efficiency against heavy metal ions is further improved. The chromotropic acid anions are positioned in a restricted domain space between the hydrotalcite layers, and after adsorption and chelation of the heavy metal ions, the convenience in separation and recovery of the hydrotalcite is utilized for solving the problem of recovery of an adsorbent.
Owner:BEIJING UNIV OF CHEM TECH

Method for implementing polyinstantiated access control in computer operating systems

A master daemon (a dedicated program component) is provided for a computer operating system which utilizes selected criteria to perform actions in one or more domains, as defined. The master daemon provides application program interfaces (APIs or facilities) and monitors all requests (for which the master daemon is configured) directed to the associated computing base including the operating system. All requests are in the form of encapsulated information as defined. In general, the master daemon, in response to such requests, performs the actions, each constrained to operate exclusively in a single domain. Selected criteria that may be contained in encapsulated information may define a higher-order multidimensional domain space for segregating system operational functionality according to configured boundaries. Multiple instances of actions may exist simultaneously in the same domain in the associated computing base, with the master daemon performing the actions for each request as required in each selected domain. According to a specific embodiment, as prompted by limitations in a purportedly multilevel secure operating system normally directly responsive to autonomous daemons, security is improved through an augmentation applied to the operating system in the form of a master daemon and operative according to a method for controlling access to domains. More specifically, a domain may be configured using constructs of security labels and other criteria.
Owner:POLYSECURE SYST

Frequency spectral integration processing method and device as well as storage medium

The invention discloses a frequency spectral integration processing method and device as well as a storage medium. The method comprises the following steps: training a neural network model by using adeep learning method and on the basis of a source domain training sample, so that a trained source domain optical fiber transmission model is obtained; performing transfer learning training on the source domain optical fiber transmission model by using the deep learning method and on the basis of the source domain training sample, so that a target domain optical fiber transmission model is obtained; and receiving a sending path establishment request specific to a service flow, and if a fact that a resource can not be reserved for the service flow in a target domain space division multiplexingoptical network is judged, based on the target domain optical fiber transmission model, predicting frequency spectral integration predication time corresponding to the service flow, and performing corresponding processing on the basis of the frequency spectral integration predication time. The method and device as well as the storage medium which are disclosed by the invention can complete frequency spectrum resource optimization before a service start time and finally effectively bears a service about to be blocked, so that service blocking rate is reduced, frequency spectrum resource utilization rate is improved, and using experience degree of a user is improved.
Owner:BEIJING UNIV OF POSTS & TELECOMM

Interface development method and device, computer equipment and storage medium

PendingCN113918149AEnsure safetyIt is also safe to ensure that the front-end is directly connected to the databaseDatabase management systemsSoftware engineeringDatabase interfaceDomain space
The invention relates to a program interface development method and device, computer equipment and a storage medium. The method comprises the steps of obtaining program information from a displayed interface aggregation platform, wherein the program information comprises a program identifier and a first permission identifier; obtaining an identifier of the database interface and a calling permission of the database interface; and in response to the interface aggregation request, detecting and determining that the interface aggregation request corresponds to the first permission identifier, establishing a dependency relationship between the program identifier and the identifier of the interface, and generating a developed program. By adopting the method, the first permission identifier such as the token can be set through the front end to ensure that the front end is directly connected with the database, the security is realized, the one-to-one correspondence between the query and the query of the database is realized, the problems of task manager, serial and parallel, construction of domain space of a management data interface and the like do not need to be considered, and the overall structure is relatively simple.
Owner:云南腾云信息产业有限公司
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