133 results about "Fragment size" patented technology

The invention discloses a connection query system and a connection query method for a distributed data warehouse. The system comprises a master node, mapping work nodes and reduction work nodes, wherein the master node calculates a fragment size according to the size of a data table and system performance, allocates a data block to the mapping work node based on the calculated fragment size, and formulates fragmentation mapping rules and summarization rules in the mapping work node; the mapping work node maps a query keyword in the data block to a corresponding fragment number according to the fragmentation mapping rules, and transmits data with the same fragment number to a specified reduction work node according to the summarization rules; and the reduction work node receives the data from the mapping work node, combines the data with the same fragment number and establishes connection according to the query keyword to obtain a final connection query result. By the system and the method, data transmission in a distributed system is reduced, the data volume and program complexity of the reduction work node are decreased, and the performance of the distributed data warehouse is improved.

A method of changing a fragment size of data packets in a router where a data packet is divided into the data packets having the fragment size, and are transmitted to a network along with audio packets includes the steps of acquiring, in the router, a parameter indicative of whether proper audio quality is maintained through transmission of the audio packets, and changing the fragment size of the data packets in response to the acquired parameter.

The present invention relates to compositions, methods, and kits for quantifying variations in gene copy number, e.g., of individual genes or of chromosomes or portions of chromosomes in an homogeneous reaction, without the need for target amplification, fragment size resolution, or microscopy.

The present invention is directed to a method, computer program product, and system for processing memory access requests. The method includes the following features. First, page table entries of a page table are organized into at least one fragment that maps logical memory to at least one of logical memory or physical memory. The at least one fragment has a fragment size and an alignment boundary. Then, a subset of the page table entries stored in one of a plurality of cache banks is accessed to determine a mapping between a first logical memory address and at least one of a second logical memory address or a physical memory address. Each cache bank is configured to store at least one page table entry corresponding to a fragment of a predetermined set of fragment sizes and a predetermined alignment boundary.

The embodiment of the invention discloses a BT download method, which comprises the following steps: obtaining a first request data packet which is sent to an index server in a network; sending a second request data packet to the index server according to resource information to be downloaded which is obtained by analyzing the first request data packet, wherein the second request data packet is used for requesting for owning client-end list information of resources to be downloaded from the index server; receiving the client-end list information returned by the index server; interacting with at least one client end in the client-end list and obtaining fragment information of the resources to be downloaded, which comprises fragment size information; and downloading the resources to be downloaded from at least one client end according to the fragment information of the resources to be downloaded. By adopting the download method, BT resources can be downloaded when seed documents cannot be found, thus improving the reliability of BT resource downloading.

The invention provides a method for optimizing grain composition of a blasting rockfill material based on a fractal theory. The method is characterized by comprising the following steps of: establishing a function relation among the grain fractal dimension, compacted dry density and average particle size of the rockfill material, and further establishing a relation between a blasting scheme or parameter and the compacted dry density of a field rockfill material according to a correction Kuz-Ram model for forcasting the blasting fragment size distribution of a rock mass; and obtaining an optimal grain composition of a dam construction rockfill material which is easier to compact by adjusting the blasting scheme or parameter. The method can be applied to optimized design of the grain composition of the blasting rockfill material.

The invention relates to a file transmission method and a file transmission terminal. The file transmission method comprises the steps of: establishing a Bluetooth communication connection with a receiving terminal; and dynamically adjusting fragment size of a next transmission fragment in remaining data of a file to be transmitted according to a preset fragmentation strategy, and transmitting the next transmission fragment to the receiving terminal according to the fragment size until the transmission of the file to be transmitted is completed. By dynamically adjusting the fragment size, the file transmission method and the file transmission terminal can shorten time consumption of data transmission, especially in big data transmission, and improve the data transmission capability and efficiency between the terminals.

The application discloses a document transmission method. The document transmission method comprises the following steps: segmenting data of a transmitted document into document fragments with a preset number by adopting a preset fragment size value as a unit; transmitting the document fragments, and respectively recording the transmission rate of each document fragment; determining the network transmission rate of a next moment according to the transmission rate of each document fragment; updating the fragment size value according to the network transmission rate of the next moment, and segmenting data which are not transmitted in the transmitted document into document fragments with the preset number by adopting the updated fragment size values as a unit; and re-determining the transmission rate of a network at the next moment according to the transmission rate of the current document fragment so as to update the fragment size value, segmenting data which are not transmitted into the document fragments with the preset number, and transmitting the data of the transmitted document. By matching the fragment size value with the transmission rate of the network at the next moment, a purpose for adequately utilizing the current network transmission data flow capacity and reasonably utilizing the data transmission flow capacity of the network can be realized.

The present invention facilitates overall system performance by balancing system resource utilization and network throughput. The invention analyzes packets received from host software selects one or more of buffers to coalesce into a single, coalesced buffer. The selection is based upon an initial fragment size selected to facilitate overall system performance. The coalesced buffer and non-coalesced buffers, are passed to a network device for transmission.

The present invention relates to improved methods of prenatal diagnosis, screening, monitoring and/or testing. The inventive methods include analysis of the fragment size distribution of cell-free fetal DNA isolated from amniotic fluid. The inventive methods allow for rapid screening of fetal characteristics such as chromosomal abnormalities and for prenatal diagnosis of a variety of diseases and conditions. Since the new methods do not require cell culture, they can be performed more rapidly than conventional fetal karyotypes.

A system and method are disclosed to improve processing time of a database system by continuous automatic background optimization of a cache memory that is fragmented into a plurality of cache fragments is described. The system and method include collecting indicators about efficiency of individual cache fragments by at least one of measuring a cache hit ratio of each cache fragment, measuring a processing time that a CPU of the database system needs to prepare data in the individual cache fragments, and measuring execution time the CPU needs to process the data in accordance with a SQL query. The system and method include calculating and revising approximation curves for measured values of each cache fragment to find a combination of cache fragment sizes with a highest system throughput. The system and method include changing the sizes of the cache fragments to receive highest system throughput.

The invention relates to a method for detecting embryonic chromosome abnormality by virtue of blastochyle free DNA. The method comprises the following steps: acquiring blastochyle free DNA, detecting the blastochyle DNA, carrying out whole genome amplification of the free DNA, analyzing a product of the whole genome amplification, implementing fragmenting treatment on genome DNA, carrying out quantitative analysis and fragment size analysis on fragmented target DNA, constructing a library, sequencing by virtue of a computer and analyzing biological information. By virtue of high-throughput sequencing, the method disclosed by the invention can be used for overcoming shortcomings of a conventional DNA analysis method which is merely used for researching partial region of a single cell genome, and is capable of completely analyzing the genetic information of the single cell genome; the method is simple and convenient to operate, time-saving and efficient; meanwhile, by using the blastochyle free DNA as a detection sample, the method is convenient and safe to sample, so that the probability of later embryonic development abnormality is reduced and embryo is protected from being influenced in later development.

The invention relates to a fragment processing method for a high-definition media-oriented embedded file system, and the method comprises the following specific steps: firstly establishing a using linked list of idle data blocks of the embedded file system for recording block number and length of each one of all the idle data blocks of a magnetic disk; secondly determining idle data blocks forming fragments and the positions of the fragments according to the block number and the length of each idle data block recorded by the using linked list of the idle data blocks of the embedded file system, as well as the definition of the fragment sizes of the idle data blocks; comparing the size of each fragment with the length of each idle data block in a chip unit storage unit, judging the idle data blocks forming the fragments, and determining the position of each fragment according to the block numbers in the using linked list of the idle data blocks in the embedded file system; further processing the fragments by data movement and fragment merging; and finally updating the using linked table of the idle data blocks of the embedded file system.

The dynamically configurable controlled fragmentation insert mechanism of this invention includes an assembly of three or more sleeves with differing through hole patterns thereon, that fit inside the shell casing. The individual sleeves can move independently of one another and a simple pinning mechanism holds the parts in place for a selected configuration. The warfighter can realign the insert sleeves by to create different geometric patterns of holes, each designed to engage a different target set with optimally sized fragments. The aligned patterns of holes creates individual geometric shapes that focus high-velocity jets to cut into the steel shell casing to correlate to the through-holes in the aligned patterned sleeves. Realigning the insert sleeves changes the through-hole pattern to produce different fragment sizes and mass distributions. To defeat light armored vehicles for instance, a warfighter can deploy a sleeve hole pattern to produce larger fragments with greater penetrating power, while to engage enemy troops for instance, a warfighter can “dial in” another hole pattern through the fuze assembly to otherwise produce a much larger number of smaller, lighter fragments.

A receiving apparatus receiving data separated into a plurality of fragments comprises a detection unit adapted to detect the fragment size of the fragments, and a management unit adapted to manage the arrival status of the plurality of received fragments using the detected fragment size as a unit.

The invention discloses a data storage method and system, electronic equipment and a computer readable storage medium. The method comprises the steps of acquiring parameter values used for representing the stored data volume of a current storage system; determining the size of a target fragment positively related to the parameter value; determining the number of target fragments based on the sizeof the to-be-written data and the size of the target fragments; and creating a target fragment in the target disk according to the target fragment size and the target fragment number, and storing theto-be-written data by using the target fragment. The size of the target fragment positively related to the current storage system is determined based on the parameter value representing the stored data size of the current storage system, it is guaranteed that when the stored data size is large, the large fragment size is determined, the fragment number is relatively reduced, the expenditure of metadata operation is effectively reduced, and the performance of the system is improved; and when the stored data volume is small, the relatively small fragment size is determined, so that the large data management granularity caused by the large fragment is avoided, and the flexibility of the system and data management is improved.

The invention discloses a target damage assessment method for bullet-mesh intersection of a near-burst fragment distribution field. The method comprises the steps of obtaining a centroid pixel coordinate of a fragment image; Calculating spatial three-dimensional position coordinate parameters of the fragments; Establishing coordinate systems respectively; Obtaining a fragment static distribution function at the moment of bullet explosion; Obtaining a fragment dynamic distribution function; Establishing a target damage mathematical model based on a rectangular unit; Obtaining an association model between the position, the speed, the direction vector, the fragment size and the shape of the fragment and the target damage; And obtaining the damage probability and penetration thickness of the target by the fragment field. According to the method, the calculation method for the random target damage by aiming at the fragment field can be obtained, and a theoretical basis is provided for further research on target damage assessment.

The invention discloses a frequency hopping and time hopping pattern design method suitable for statistical priority multiple access. According to the method, a time axis of a whole network node is synchronously divided into a series of continuous and fixed-length data time frames according to fragment transmission of data packets, the data time frames are further divided into a plurality of pulsetime slots according to fragment sizes, and the number of the pulse time slots and the total number of designable patterns are respectively calculated by considering whether adjacent pulses are overlapped or not. And a basic frequency hopping sequence family is constructed based on a truncated prime number frequency hopping sequence method, and then expansion and truncation are performed on the basic frequency hopping sequence to obtain a frequency hopping sequence family. And frequency points of the frequency hopping sequence are inserted into a time-sequence matrix, and rows, columns and the frequency points of the matrix are randomly arranged to obtain a final frequency hopping and time hopping pattern. The method can effectively avoid data conflict caused by simultaneously sending signals at the same frequency point, and a specific frequency hopping and time hopping pattern realized by numerical simulation in MATLAB proves the effectiveness of the method.

Disclosed is a computer-implemented method of determining at least one optimal alignment of at least part of a first map to at least part of a second map or a plurality of second maps, wherein the maps are physical genome maps and/or restriction maps. The method comprises: receiving first map data indicative of a first ordered list of distances between features of the first map, receiving second map data indicative of a second ordered list of distances between features of the second map or second maps; generating, from the second map data, seed data indicative of a plurality of seeds, each seed comprising at least one of the distances in the second ordered list, wherein the features are restriction sites and distances are fragment sizes. The said method further comprises generating a plurality of candidate alignments from the seed data by searching at least part of the first ordered list to find at least approximate matches for respective seeds, and extending the approximate matches by dynamic programming; determining respective alignment scores for respective candidate alignments; and selecting one or more of the candidate alignments as an optimal alignment or optimal alignments, based on the alignment scores.

The present invention belongs to the field of animal propagation technology, in the concrete, said invention belongs to the field of poultry sex identification technology, in particular it relates to a method for identifying chick embryonic desc sex by utilizing multiple PCR. Said method includes the following steps: (1), according to chick EE0.6 sequence whose GenBank accession number is D85614 designing two pairs of nested primers and according to chick wispl gene whose GenBak accession number is NC 006089 designing two pairs of nested primers which can be used as internal contrast; and (2), extracting chick blood sample genome DNA whose sex is defined, making primer specificity check, then extracting chick embryonic disc cell DNA to be detected, making PCR amplification, and utilizing the amplified DNA fragment size to identify the chick embryonic disc sex.