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396 results about "On column" patented technology

Super-resolution confocal microimaging method and device based on column polarization vortex beam

The invention provides a super-resolution confocal microimaging device based on a column polarization vortex beam. The super-resolution confocal microimaging device comprises a pinhole filter, a collimating lens, a polarization and phase transformation system, a pupil filter, an optical filter, a detector and a three-dimensional translational platform, wherein a beam emitted from a laser passes the pinhole filter to obtain a Gauss basic mode beam, the collimating lens collimates the Gauss basic mode beam into the parallel beam, the polarization and phase transformation system allows the parallel beam to pass and obtain the column polarization vortex beam with preset polarization and phase distribution, the pupil filter allows the column polarization vortex beam to pass and to be reflected through a beam splitter and focused on a to-be-detected sample through a collecting lens, light signals reflected from the sample pass the collecting lens and the beam splitter to be incident on the optical filter, and the optical filter only allows a fluorescence signal of the light signals to be transmitted, the fluorescence signal is focused on a detecting pinhole through the collecting lens and is detected and converted, through the detector, into an electrical signal to be output, the sample is placed on the three-dimensional translational platform, detection of the sample at different positions can be realized by moving the three-dimensional translational platform, and accordingly three-dimensional scanning imaging of the sample can be realized.
Owner:BEIJING INFORMATION SCI & TECH UNIV

Construction and management method for secondary indexes of key value library

The invention relates to a construction and management method for secondary indexes of a key value library and belongs to the technical field of computer data management. The construction and management method for secondary indexes of the key value library mainly aims at performing index on columns in the key value library so as to accelerate range query of the columns. The method includes initializing an index information column family and an index entry column family needed by the secondary indexes of the key value library and setting a comparison type of column names of the column families as a composite column name type; building a batch processing operation list of the secondary indexes to data to be indexed and submitting the completion of an index creation to the key value library; and according to the query requests of a user and with an index name serving as a column key, building a minimum and a maximum of a composite column name with query ranges and obtaining and sending back query results from the index information column family. The method is based on column families of the key value library, indexes are performed by building of the composite column name, most operations of the indexes are column operations, the speed is rapid, and efficient range inquires are facilitated for users.
Owner:TSINGHUA UNIV

Vehicle color identification method based on defogging processing and weight blocking

The invention discloses a vehicle color identification method based on defogging processing and weight blocking. The method includes the following steps that vehicle images to be identified are collected; preprocessing is conducted on the collected vehicle images; image weight blocking is conducted on the processed images; RGB-to-HSV color spatial switching is conducted on all blocks of images, the images are divided into three independent single channels according to the H component, the S component and the V component, statistics is conducted on column diagrams of different pixels of all the channels, the maximum value in each channel column diagram is found out, the maximum values of the three channels are merged, and the values of the H component, the S component and the V component of the main colors of the blocks of images are obtained respectively; the colors of all the blocking images are searched for, the most common colors in all the blocking images are found out to serve as the alternative colors of the vehicle color, color classification is conducted according to the H value and the V value, and the final vehicle color is determined. The vehicle color identification method has the advantages of being high in accuracy, good in robustness and high in practicability.
Owner:HARBIN ENG UNIV

Multi-core parallel hash partitioning optimizing method based on column storage

The invention discloses a multi-core parallel hash partitioning optimizing method based on column storage. The method mainly solves the problem that an existing parallel hash partitioning algorithm can not efficiently use resources of a multi-core processor. According to the technical scheme, data partitioning tasks are dynamically distributed to multiple cores for execution by means of a mapping and simplification parallel programming model, and corresponding strategies for avoiding write conflicts are selected according to different storage structures of column storage data sets; primary hash partitioning is carried out through a mapping thread, and an obtained primary hash partitioning result is sent to a simplification thread for secondary hash partitioning after data tilt optimization; a final hash partitioning result is fed back. According to the method, the characteristic that tasks can be executed in parallel on the multi-core processor is well used, the method can be suitable for input data in various distribution modes, high-speed caching efficiency and overall performance of the multi-core processor are improved, and the method can be used for multi-core parallel multi-step hash partitioning of the column storage data sets.
Owner:XIDIAN UNIV

Linear moving capacitive sensor twin column electronic height gauge

The present invention is an electronic height gauge utilizing new technology and includes a first column (Column 1) and a second column (Column 2), a display unit with a cover, a measuring scriber, a fixed capacitance sensor and a linear moving capacitance sensor. The fixed capacitance sensor is located on a flat surface on Column 1, flat surface having a length equivalent to the length of Column 1. The linear moving capacitance sensor is located inside the display unit cover positioned to face the fixed capacitance sensor. The fixed capacitive sensor and linear moving capacitive sensors are facing toward each other only, and do not make direct physical contact with the fixed capacitor sensor when the height gauge is operating in upward and downward movements. The fixed and moving capacitive sensors are instead making only electrical contact with each other when the height gauge is making upward and downward movements. This linear direct data non-contact sensor transfer system results in high accuracy of measurements, which also ensures the repeatability of accurate measurements. Also, since the fixed capacitance sensor and the linear moving capacitance sensor have no physical contact with each other, there is no wear and tear damage on either component part, thereby leading to a longer life of use with stability in accurate measurements and repeatability. Because the measuring system is comparatively simple, and easy to assemble and service and maintain compared to the existing rotary capacitive sensor electronic height gauges that exist on the market, the overall cost of production and maintenance is minimized. On the second column (Column 2), a simple rack and gear system is added. These gears of column 2 are connected to a hand wheel located on the rear of the display unit. The handwheel is used for making upward and downward vertical movements. This rack and gear system of column 2 of the present invention is only used to aid the same in making upward and downward movements, and does not affect the measuring accuracy of the height gauge, as it did in the height gauges that have existed on the market.
Owner:INT PRECISION INSTR CORP

Collaborative design method and system for parent plate and plate blank of medium plate oriented to production order combined optimization

The invention provides a collaborative design method and system for a parent plate and a plate blank of a medium plate oriented to production order combined optimization. The method comprises the following steps: specific to a sub-plate one-dimensional combined optimization design in a medium plate production order, building an optimized control model under the consideration of the constraints of complicated production processes, equipment and the like specific to the aim of minimizing residual materials and material loss, deciding a sub-plate combination way, the length of the parent plate and the length of the plate blank, selectively coding the plate blank section of each order after orders are received, designing a decoding method based on column generation, and generating plate blank and parent plate design schemes; then, searching for a better code string in neighborhood through repeated iterations based on tabu search; and when an end condition is satisfied, selecting a current optimal code string for evaluation and adjustment, and outputting corresponding plate blank and parent plate design results lastly. A system controller controls the design processes of the parent plate and the plate blank of the medium plate according to the method. Through adoption of the collaborative design method and system, residual parent plates and material loss are reduced, and the production demand can be met better.
Owner:CHONGQING UNIV

Time series database system based on column storage

ActiveCN110362572AImproved feature depth integrationHigh-speed index functionSpecial data processing applicationsDatabase indexingOn columnQuery optimization
The invention discloses a time sequence database system based on column storage. The time sequence database system comprises: an SQL (Structured Query Language) parser, wherein the SQL parser is usedfor converting SQL into an abstract syntax tree through parsing; a logic plan generator which is used for generating a logic query plan by utilizing the abstract syntax tree, wherein the logic query plan is expressed by a relation algebra; a query optimizer which is used for optimizing the query plan by utilizing the state information of the database and outputting the rewritten query plan; an executor which is used for executing the query plan in a block iteration mode and is responsible for interacting with the storage layer to obtain data queried by a user; and a storage engine which is used for storing data in a row and column manner. According to the invention, data in the database is stored in a column mode; based on combination of column storage and rocksdb, high-speed insertion data characteristics and an indexing function of a traditional database are achieved, in the aspect of an executor, part of operators are improved to be deeply combined with characteristics of a storageengine, and meanwhile, new characteristics of a modern processor are used for accelerating query.
Owner:ZHEJIANG BANGSUN TECH CO LTD +1

Fixture for sintering semiconductor device and sintering method for plurality of tube cores of semiconductor laser

The invention relates to a fixture for sintering a semiconductor device and a sintering method for a plurality of tube cores of a semiconductor laser. The fixture comprises a base, a support frame, a cover plate, lifting columns, springs and fixed columns, wherein the support frame is fixedly arranged on the base; the cover plate is arranged on the support frame; the lifting columns are arranged in slotted holes of the cover plates, and extend to a part below the cover plate; the springs are sleeved on column bodies of the lifting columns, and grooves are formed in the bottom surfaces of the lower ends of the column bodies; the fixed columns are inserted into the grooves; and screw holes are formed in the lower lateral surfaces of the lifting columns; screws are screwed into the screw holes, and are used for blocking the springs, and fixing the fixed columns in the grooves. The semiconductor laser is arranged on a heat sink with a solder, the heat sink is arranged under the fixed columns, pressure is applied to the tube cores through the fixed columns under the action of the springs to well fix the tube cores of the laser and the heat sink, the fixture is covered and sealed through a protective cover, and the fixture and the protective cover are arranged on a heating table for sintering. The fixture is simple in structure; and a plurality of semiconductor lasers can be sintered at one time, so that the production efficiency is improved.
Owner:Shandong Huaguang Optoelectronics Co. Ltd.

Super-long-span spoke-type suspend-dome structure based on flying-swallow-type truss arch

ActiveCN110258802ASufficient vertical stiffnessBuilding roofsArched structuresOn columnPetal
The invention provides a super-long-span spoke-type suspend-dome structure based on a flying-swallow-type truss arch. A cantilever assembly construction technology of a super-long-span flying-swallow-type truss arch bridge is used for reference, a single-layer net shell is replaced with the flying-swallow-type truss arch manufactured through single-blade double-curved-surface ruled-surface-shaped variable-section steel pipes, thus the bearing capacity and stability of the suspend-dome structure can be enhanced, and the construction difficulty is lowered; an arachnoid suspend-dome cable system is constituted by a radial cable, a circumferential cable, a ring-exterior anchor cable and vertical supporting rods, a saddle paraboloid space cable system is constituted by an on-column rigid arch, a saddle paraboloid space cable, a curved suspension beam, an oblique boom, a tail balance cable and vertical supporting rods, and the two sets of self-balancing cable structure systems cooperatively work and make respective advantages complementary to each other; and a petal-shaped arch shell roof is constituted by a roof arched bracket, truss-type purlins and a petal-shaped roof shell, and thus the appearance is beautiful. The super-long-span spoke-type suspend-dome structure has the advantages that cantilever assembly construction is convenient, the carrying capacity is high, and structural stability is good, and the 200-300-m super-long-span suspend-dome structure can be constructed.
Owner:SOUTHEAST UNIV

Column-storage oriented area-level data compression method

InactiveCN102609491ASupport massive data managementSpecial data processing applicationsData compressionOn column
The invention relates to a column-storage-oriented data compression method. The column-storage-oriented data compression method is characterized by comprising a step 1, dividing data stored according to columns into a plurality of areas; a step 2, defining a group of statistic information for the data in the areas; a step 3, sequentially defining a group of statistic quantities for each area by the aid of the statistic information in the step 2, and realizing quantitative estimation according to characteristics of distribution of the data in each area; a step 4, computing a similarity factor between each two adjacent area according to the learned statistic quantities of the two adjacent areas; a step 5, sequentially computing a value of each statistic quantity for the first area in a column, and selecting the values by a compression method according to the statistic values by the aid of a and computing a stepwise selection method; a step 6, computing a similarity factor between each two adjacent areas according to the statistic values of the remaining i area, directly applying compression strategy of the adjacent previous area if the two adjacent areas are similar, selecting a mode according to the compression method in the step 5 and selecting the compression method again; and a step 7, compressing the current area according to the obtained compression method. The compression method is based on column storage, compression is carried out according to the areas, a high-efficiency compression strategy selection method is designed, and column-storage-oriented massive data management can be effectively supported.
Owner:DONGHUA UNIV
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