134 results about "Fragment size" patented technology

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 invention discloses blasting damaged rock sample preparation and a micro-macro combined damage degree determination method, and belongs to a determination method for a damage degree of a damaged rock sample. The micro-macro combined damage degree determination method comprises the following steps: a, manufacturing a square rock with thickness of 105mm, putting an explosive and a detonator at the geometric center of the rock, adhering resistance strain gauges and acceleration sensors at key points of the rock, and connecting the resistance strain gauges and the acceleration sensors to a super dynamic data acquisition instrument; b, drilling the rock with large blasting fragment size with the key points as circle centers along the thickness direction, polishing standard rock samples, and collecting small irregular rocks; c, performing a mercury injection test on the irregular rocks, and performing CT, nuclear magnetic resonance, longitudinal wave velocity, osmotic coefficient, elasticity modulus and uniaxial compressive strength tests on the blasting damaged standard rock samples; e, performing identical micro-macro tests on homogeneous complete rock samples; and f, based on dynamic strains and acceleration waveforms, quantitatively determining the degree of damage, caused by blasting impact, to a rock material by synthesizing micro-macro test data. The determination method has the advantages of simplicity in operation and comprehensive and reliable test data.

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.

According to the invention, based on Illumina common tag library sequencing and methylation normal sequencing and combining a common library tag sequencing method, a new method for accurate detection of whole genome methylation sites by utilizing trace genome DNA (deoxyribonucleic acid) is built. According to the method, in the construction of a methylation library by using trace genome DNA, exogenous DNA is innovatively added to carry out bisulfite high-efficiency co-treatment; and at the same time, fragment size selection is not needed, and PCR (polymerase chain reaction) amplification is directly carried out after bisulfite treatment. By the method, the defects that in the common methylation sequencing, samples can not be mixed, the PCR amplification efficiency is low and the trace DNAsample can not be researched are overcome.

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.

Fragmentation of non-realtime data for transmission in frame relay networks is sized dynamically according to available bandwidth. The bandwidth is determined according to burst interval and burst size calculations based on parameters including the amount and type of realtime data to be sent and the percentage of burst interval utilized by the realtime data. If no realtime data is being sent, then the fragment sizes of the non-realtime data are adjusted to utilize the entire available bandwidth.

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 short tandem repeat (STR) typing method and system are developed for forensic identification of individual cells. Agarose-in-oil droplets are produced with a high frequency using a microfluidic droplet generator. Statistically dilute single cells, along with primer-functionalized microbeads, are randomly compartmentalized in the droplets. Massively parallel single-cell droplet PCR is performed to transfer replicas of desired STR targets from the single-cell genomic DNA onto a coencapsulated microbead. These DNA-conjugated beads are subsequently harvested and reamplified under statistically dilute conditions for conventional capillary electrophoresis STR fragment size analysis. The methods and systems described herein are valuable for the STR analysis of samples containing mixtures of cells / DNA from multiple contributors and for low concentration samples.

The application provides a data caching system, server and system based on a distributed caching system. The data caching method is characterized by comprising the following steps: a proxy server receives a caching request of to-be-cached data sent by a tenant; the proxy server generates a data distribution list according to a data division rule issued by a cluster manager, wherein the data distribution list comprises each fragment size of the to-be-cached data and a storage position of each fragment in a caching node; and the proxy server caches the to-be-cached data into the caching node according to the data distribution list. Through the adoption of the method provided by the embodiment of the application, multiple tenants can share one distributed caching system, so that the multiple tenants can be managed in unification.

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. 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.

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 invention relates to a data management method and device, a storage medium and electronic equipment. The method includes: the storage engine of a database maps the database file of the database tothe mapping space area of a database process virtual address space in advance, the mapping space comprises dynamic blocks, the free internal memory fragments of part of or all of the dynamic blocks exist in two or more than two linked list in a linked list element manner, different linked lists are used for storing the free internal memory fragments of different internal memory sizes, the linkedlists form indexes through arrays, the storage engine responds to a received allocation request for allocating the free internal memory to search for the linked list elements with the free internal memory fragment sizes capable of satisfying the allocation request in the two or more than two linked lists according to the indexes formed by the arrays; the free internal memory fragments corresponding to the searched linked list elements are allocated to the allocation request, and deleting the linked list elements from the linked lists where the lined list elements are located. By the data management method, a large amount of small data can be fast processed in a non-volatile manner.

Aspects of a system for optimizing fragment size for aggregation at the physical layer may include one more switch ICs and / or physical (PHY) layer ICs that enable reception of data packets via a medium access control layer protocol entity. Each received data packet may be fragmented into a plurality of fragment payloads, wherein a length of each of the plurality of fragment payloads is selected from a plurality of candidate lengths. Each of the plurality of fragment payloads may be sent via a PHY layer protocol entity instance selected from a plurality of PHY layer protocol entity instances.

Disclosed is a device and method that relates to radio engineering and especially to data transmission in a wireless local area network. The method improves the throughput of the wireless local area network, by selecting a transmission rate, data transmission mechanism and a fragment size which maximize the network throughput considering the receiving conditions on the receiver (bit error rate in the transmitted data units of the transmitter ) and taking into account the current network loading are selected for transmission of data units.

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 relates to a method for preparing a cfDNA library qPCR quantification standard substance. The method comprises the steps of extracting cfDNA, wherein the length of cfDNA is 160-200 bp, and the concentration of cfDNA is 0.3-1 ng / [mu]l; establishing a cfDNA library by means of cfDNA, wherein the fragment size of the cfDNA library is 280-320 bp, and the concentration of the cfDNA library is 100-150 ng / [mu]l; conducting precise quantification on the cfDNA library by means of the third generation of digital PCR QX200Droplet Digital PCR system, so as to obtain the cfDNA library qPCR quantification standard substance, wherein the concentration of the cfDNA library qPCR quantification standard substance is 10-100 pM, and the length of the cfDNA library qPCR quantification standard substance is 280-320 bp. The qPCR standard substance is prepared specially for the cfDNA high-throughput sequencing library, so as to improve the precision of cfDNA library quantification and reduce the data size error of high-throughput sequencing.

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.