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46results about How to "Eliminate calculations" patented technology

Data storage control method and apparatus for external storage device using a plurality of flash memories

The present invention is to realize a data storage control method and apparatus for an external storage device using flash memories. The method and apparatus can eliminate the data erasure waiting time, eliminating the calculation of the erasure numbers of flash memories, elongating the life-time of the flash memories. Data is stored sequentially from a first flash memory for rewrite data to a third flash memory for rewrite data. When there is no vacant area in the third flash memory for rewrite data, a CPU instructs a first flash memory for garbage collection among the first and second flash memories for garbage collection to perform the garbage collection of the first flash memory for rewrite data. When a host computer issues a write access request, the write process is performed in the first flash memory for garbage collection with the first priority. When the garbage collection of the first flash memory for rewrite data has been completed, the garbage collection of the second flash memory for rewrite data is performed by the second flash memory for garbage collection. At the time of performing the garbage collection of the second flash memory for rewrite data, the data of the first flash memory for rewrite data is simultaneously erased. The first flash memory for garbage collection is changed into a flash memory for rewrite data by the CPU. Upon completion of the garbage collection of the second flash memory for rewrite data, the data thereof is simultaneously erased and the second flash memory for garbage collection is changed into a flash memory for rewrite data. Then, the garbage collection of the third flash memory for rewrite data is performed in the similar manner.
Owner:HITACHI LTD

Digital video decoding method based on image processor

The invention provides a decoding method for compression video based on a GPU. The method utilizes point graphic element to show video block instead of square and maps decoding segments to the GPU except variable length decoding, and then the GPU organizes video data into point collection and completes decoding process by drawing point collection. The invention has the advantages of a CPU and the GPU so that the two work in parallel accelerate video decoding process; the invention has high performance of hardware decoding and flexibility of software decoding at the same time, can handle a plurality of video compression format and standard, replace a special decoding hardware of personnel computer with the GPU, a game console, a handheld mobile device, etc, and improve the utilization of hardware resources and reduce cost.
Owner:PEKING UNIV

Query optimization method based on join index in data warehouse

The invention relates to a query optimization method based on a join index in a data warehouse. The method comprises the following steps: creating a fact table foreign key join index based on a dimension table surrogate key; creating a join index update strategy; when a predicate condition exists on a dimension table, making a predicate judgment after direct access to dimension table record through the join index, and performing calculation through a dynamic bitmap join index by reference to a bitmap join index to generate a join bitmap index; when the selection rate on the dimension table is very low, further compressing a dimension table bitmap in order to raise the cache level of dimension table bitmap calculation; and calculating simple memory address access by only using an array-bitmap data structure with a reference bitmap join index calculation method based on co-processor memory calculation. Through adoption of the query optimization method, the calculation performance of the bitmap index can be effectively increased. Moreover, the query optimization method can be combined with high-performance co-processors such as GPU and Intel Xeon Phi TM to accelerate the index calculation performance, and can be widely applied to the field of data warehouses.
Owner:RENMIN UNIVERSITY OF CHINA

SaaS SETTLEMENT SYSTEM, SaaS USAGE-FEE SETTLEMENT METHOD, AND PROGRAM

The necessity of calculating a SaaS usage fee by a SaaS service provider is eliminated, and operation efficiency of the SaaS service provider is improved. When a SaaS user 10 uses a SaaS 14, the used volume thereof is accumulated in an operation-system database 21 through a SaaS execution infrastructure 17. When a usage-fee calculation date of the SaaS 14 comes, a business infrastructure 18 acquires used-volume information from an operation infrastructure 19 and calculates a usage fee of the SaaS 14 in accordance with application contents of the SaaS user 10 and usage cost of the SaaS execution infrastructure 17, the business infrastructure 18, and the operation infrastructure 19 used by the SaaS service provider 12 for realizing the SaaS 14. When a billing date comes, the usage fee of the SaaS 14 is billed to the SaaS user 10 and, after money is received, the usage cost of the SaaS service infrastructure 16 of the SaaS service provider 12 is subtracted therefrom, and the difference thereof is paid to the SaaS service provider 12.
Owner:HITACHI SYST

Motion estimation method using multilevel successive elimination algorithm

The present invention provides a motion estimation method using a multilevel successive elimination algorithm. The present invention includes the steps of: a) selecting an initial candidate block among a plurality of candidate blocks in an image frame for computing an initial SAD; b) selecting four vertex candidate blocks placed at vertexes of a imaginary perfect square based on the initial candidate block as the center of the imaginary perfect square; c) extracting elimination levels of the four vertex candidate blocks by performing the MSEA; d) predicting elimination levels for side candidate blocks which are located at sides of the perfect square based on a spatial correlation between elimination levels of candidate blocks and the extracted elimination levels of the four vertex candidate blocks; and e) extracting elimination levels of the side candidate blocks by performing the MSEA based on the predicted elimination level.
Owner:PANTECH CORP

Method of compensating anisotropy in a vibrating-bell inertial rotation sensor

The method serves to compensates anisotropy in an inertial rotation sensor comprising a metallized vibrating bell (1) having a bias voltage applied thereto, the vibrating bell (1) having an edge (7) electrodes (5.1, 5.2), and the method comprises the steps of measuring, preferably by multiplexing, the anisotropy between the electrodes and of applying to the electrodes a fraction of the bias voltage that depends on the differences measured between the electrodes.
Owner:SAFRAN ELECTRONICS & DEFENSE

Non-orthogonal multiple access system signal detection method with low complexity

The invention discloses a non-orthogonal multiple access system signal detection method with low complexity, and belongs to the technical field of wireless communication. The method includes steps: performing ranking according to SNR values of signals, performing ranking QR detection on a matrix, and obtaining an orthogonal matrix and an upper triangular matrix; switching a pair of adjacent columns with another pair of adjacent columns in the matrix by employing the symmetry between column vectors to reduce orthogonal calculation in a ranking QR decomposition algorithm; and detecting a reception signal matrix outputted by a receiving end according to an iteration formula to obtain an estimated value of a transmitting signal. According to the method, on the premise of not reducing the system performance, the complexity of the conventional algorithm is reduced, and the calculation complexity is almost 50% of that of the conventional method.
Owner:NANJING UNIV OF POSTS & TELECOMM
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