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96 results about "Normal sequence" patented technology

In mathematics, the term normal sequence has multiple meanings, depending on the area of specialty. In general, it is a sequence with "nice" properties. In set theory, a normal sequence is one that is continuous and strictly increasing. In probability theory, normal sequence may be used synonymously with normal number. References. Thomas Jech.

Method and apparatus for differential pressure testing of catalytic reactor tubes

A multi-tube differential pressure (Delta P) testing system for testing catalyst filled tubes of tube and shell type catalytic reactors has at least one mobile test unit for movement on the upper tube sheet of a catalytic reactor. An array of test probes is mounted to the mobile test unit and is selectively positionable in sealed gas pressure communicating engagement within the upper ends of selected reactor tubes. A pressure testing gas delivery system is interconnected with the test probes and selectively communicates pressurized gas to the testing tubes at a blow-down pressure or selected test pressure determined by restricted orifices. A differential pressure measurement system measures the back-pressure resulting from application of test pressure to individual reactor tubes and having a computer receiving electronic back-pressure measurement data and producing an electronic and / or visual record correlated with a reactor tube numerical sequence and identifying the resulting back-pressure of each reactor tube of the multi-tube test. The testing system is capable of selectively electronically counting in normal sequence and in inverted sequence to accommodate test unit orientation and incorporates a separate manually positioned testing wand to accommodate tube positions of the reactor that cannot be readily accessed by one or more of the array of test probes.
Owner:WINDLASS METALWORKS

Frequency domain OFDM symbol generation method and preamble symbol generation method

InactiveCN105024963AEasy to decode and demodulateFix Estimation Performance DropMultiplex code generationMulti-frequency code systemsTime domainPhase shifted
The invention discloses a frequency domain OFDM symbol generation method and a preamble symbol generation method. The frequency domain OFDM symbol generation method comprises the steps of: generating fixed sequences and signaling sequences in a frequency domain respectively; filling the fixed sequences and the signaling sequences which are arranged in an odd even interleaving manner to an effective subcarrier; and filling zero-sequence subcarriers on both sides of the effective subcarrier to form a frequency domain OFDM symbol with a preset length. According to the technical scheme provided by the invention, the frequency domain OFDM symbol generation method and preamble symbol generation method prevent the generated signaling sequences from having a property of circular shift or circular shift plus phase shift in a time domain, solves the degradation problem of channel estimation performance of the frequency domain, and further ensures that a receiving end can process and receive signals when carrier frequency deviation ranges from -500kHz to 500kHz.
Owner:SHANGHAI NAT ENG RES CENT OF DIGITAL TELEVISION

Network intrude detecting method based on inherent subsequence mode decomposition

The invention discloses a network intrusion detection method which makes decomposition based on an inherent subsequence mode, including the following steps: 1, network data interception and pretreatment are done; 2, the sequence of a normal training set and a suspected sequence respectively go through the inherent sequence pattern mining, wherein, a sequence chart is established for the sequences; a closed path in the sequence chart is located and identified as a candidate sequence for the inherent subsequence mode; the inherent subsequence modes composing each candidate sequence are located according to the original sequence; 3, stratification is made in accordance with the support degree; 4, anomaly detection is done as follows: firstly, the inherent subsequence modes of the suspected sequence and the normal sequence respectively and independently form a plurality of layers in accordance with the respective support degree, then the inherent subsequence mode of the suspended sequence and the normal subsequence are matched in the corresponding layer, finally, the anomaly degree is calculated based on the number of matches so as to judge whether the suspected sequence is abnormal. The method overcomes the deficiencies in the prior art and can accurately and effectively identify the existing attacks and the increasing number of new attacks.
Owner:四川电子科技大学教育发展基金会

Sand core structure for precasting high-pressure oil channel of engine cylinder cover and precasting method

ActiveCN101817061ASimple structureIncrease annual production capacityFoundry mouldsFoundry coresNormal sequenceQuality control
The invention discloses a sand core structure for precasting a high-pressure oil channel of an engine cylinder cover. In the sand core structure, a through hole is formed on a dead head core; a high-pressure oil channel sand core is arranged in the through hole; the high-pressure oil channel sand core comprises a high-pressure oil channel hole sand core and a push rod hole sand core; the push rod hole sand core is arranged on the high-pressure oil channel hole sand core; a positioning hole is formed on an internal arm of the through hole; the push rod hole sand core is fixed in the positioning hole; the push rod hole sand core is provided with a core head; and a vent hole is formed on the dead head core corresponding to the positioning hole. The precasting method comprises the following steps of: firstly, matching and adhering the high-pressure oil channel sand core with the dead head core; secondly, matching and adhering the dead head core with an oil pool core; thirdly, making a cylinder cover water jacket sand core and an air duct sand core in an external die according to a normal sequence; and finally, placing the assembled sand cores into a metal external die for pouring to obtain the high-pressure oil channel precast cylinder cover after the sand cores are solidified. The sand core structure and the precasting method have the advantages of improving labor productivity, reducing processing cost, reducing rejection rate and improving the quality control effect of cast blanks.
Owner:CHERY AUTOMOBILE CO LTD

Multiple controls for molecular genetic analyses

A method for constructing multiple nucleic acid sequences for use as positive controls in a genetic test is described. Compositions according to the invention including multiple nucleic acid sequences constructed as described are the optimal controls for simultaneously testing multiple variable nucleic acid sequences at one or more DNA or RNA sites in a subject or subjects. Sequences according to the invention can be prepared chemically and/or by PCR amplification for use directly or after cloning and propagation. At the same time, some sequences can be PCR amplified and/or cloned directly from total genomic DNA obtained from an individual carrying the mutation or variant. Alternatively, the normal sequence to be changed can be cloned and then modified by site directed mutagenesis. Several single mutant or polymorphic sequences that together comprise a panel of multiple control sequences can be added individually to single site tests or mixed together or ligated together by further PCR or by cloning into vectors prior to use in individual or multiplex tests. Controls sequences constructed according to the invention can be used when testing any genetically transmitted nucleic acid sequence by organizations testing quality assurance and by companies maintaining quality control of manufactured genetic test kits.
Owner:CHILDRENS HOSPITAL MEDICAL CENT OF AKRON

A training sequence generating method, a training sequence generating device, and an optical communication system

ActiveCN102959918ASolve the problem of optical signal frequency deviationSynchronisation by photonic/optical meansElectromagnetic network arrangementsTime domainCommunications system
The invention provides a training sequence generating method, a training sequence generating device, and an optical communication system, wherein the training sequence generating method comprises: generate a pseudo-random sequence; access to the modulator chirp coefficient used in the optical communication system; to use negated chirp coefficient of the pseudo-random sequence modulated to produce a pseudo-random sequence chirp; frequency domain construct contains L subcarrier training symbol segments, wherein, in the training symbol segment: the signals sent by the ordinal number for the even-numbered subcarriers for the pseudo-random sequence of chirp in the same sequence number of the pseudo-random number of the frequency-domain signal, the sequence number for the odd-numbered sub-carrierthe zero-level signal on a signal transmitted; segment of the training symbols from the frequency domain to the time domain to obtain the segment of the training symbols in the time domain; output after the training sequence is generated based on the time domain training symbols paragraph. The technical solution provided by the present invention can effectively solve the introduction of the optical signal caused by the frequency offset chirp.
Owner:HUAWEI TECH CO LTD

Electricity consumption abnormity detection method, device and equipment and readable storage medium

The invention discloses an electricity consumption abnormity detection method, an abnormity detection device, an abnormity detection device and a computer readable storage medium. the electricity consumption abnormity detection method comprises the steps: collecting sequence characteristic values of each target time point from a plurality of power consumption time sequences according to a preset time interval, so as to generate a characteristic data sequence corresponding to each power consumption time sequence; Calculating abnormal scores of all the characteristic data sequences according toan isolated forest algorithm; If the abnormal score is greater than an abnormal warning value, confirming the feature data sequence as a normal sequence; And if the abnormal score is smaller than or equal to an abnormal warning value, determining the feature data sequence as an abnormal sequence. The accuracy of power consumption abnormity detection is improved, the interference of abnormal valuesis eliminated, the calculation complexity is reduced, and the detection efficiency is improved.
Owner:PING AN TECH (SHENZHEN) CO LTD

Construction method for underground pipe rack to pass through river

The invention provides a construction method for an underground pipe gallery crossing a river, comprising the following steps: setting out the line to determine the position of the excavation line of the pipe gallery crossing the river section; excavating and connecting the upstream and downstream of the excavation line of the pipe gallery crossing the river section at a safe distance The diversion open channel; the first cofferdam and the second cofferdam that can intercept the water flow are respectively set on both sides of the excavation line of the pipe gallery crossing the river; after the area between the first cofferdam and the second cofferdam is dewatered Excavate from one end of the excavation line of the pipe gallery crossing the river section, excavate to the designed depth, set the first foundation pit support on the side wall of the foundation pit, continue excavating to the final depth required by the pipe gallery crossing the river section, and Set the second foundation pit support on the side wall of the foundation pit below the first foundation pit support; construct the pipe gallery crossing the river section in the normal order, and carry out waterproof treatment on the section of the pipe gallery crossing the river after construction; backfill the foundation pit After the completion, the river will be changed back to the old course, and the construction of the pipe gallery will continue. The invention has the advantages of simple process, excavable technical method, guaranteed safety, low cost and reasonable economy.
Owner:CHINA HUAYE GROUP +1

Polar code coding method with any code length

The invention discloses a Polar code coding method with any code length. The Polar code coding method comprises the following steps: determining coding parameters; marking all the sub-channels used for transmitting the information, sorting the channel capacities of the plurality of sub-channels under the specific signal to noise ratio, and storing the sorted channel index sequence; setting a polarization kernel and calculating an intermediate matrix and the number of lines needing to be deleted; calculating to obtain an initial reduction matrix; judging and correcting the initial reduction matrix to obtain a new polarization matrix; and constructing an information sequence and carrying out polarization coding to obtain a final coding sequence. According to the invention, the coding sequence output by the Polar code encoder can be any code length, so that the application flexibility of the Polar code in 5G application is improved; the method has the advantages that information bit lossis avoided as much as possible, effective transmission of information is guaranteed, decoding bit error rate is reduced, communication system performance is improved, and higher digital communicationsystem applicability is achieved.
Owner:CENT SOUTH UNIV

DNA data storage mixed error correction and data recovery method

The invention discloses a DNA data storage mixed error correction and data recovery method. The method comprises the following steps: screening sequencing reads according to two standards of an editing distance of an overlapping part of double-end reads and whether verification information of a label part is correct or not; clustering the read segments according to the recovered label and file number, and dividing the read segments in the cluster into a middle overlapping part and a non-overlapping part; if the number of the copies of the middle overlapped part or the non-overlapped part is greater than a set threshold value, determining a central sequence by adopting a clustering method, otherwise, performing determining through multi-sequence combination; dividing a basic group of a datapart corresponding to each read segment into a plurality of segments with preset lengths, and performing joint error correction on each segment according to odd-even of a column sequence number and corresponding segments before and after the odd-even of the column sequence number; and during error correction, adopting multi-sequence combination to finally obtain reliable recovery of the fragmentof which the repeated code length is the preset length. The method mainly solves the problems of insertion/deletion errors in sequencing reads and combination of reads covered by low sequencing.
Owner:TIANJIN UNIV

A railway signal circuit combination frame side terminal wiring method

The invention provides a railway signal circuit combination frame side terminal wiring method, which is realized by performing secondary development on CAD (Computer Aided Design) software. The neuralnetwork method comprises the following steps: drawing a signal circuit template graph in CAD, and performing the following operations on the basis: S1, compiling a man-machine conversation designatedcable wiring connection relation module; S2, compiling various circuit wiring terminal distribution program modules; S3, compiling an actual circuit diagram generation program module; S4, compiling an application program module for extracting wiring information from the actual circuit diagram; S5, compiling a side terminal wiring application program module of the combination frame; S6, compilinga BIM interface module; and S7, compiling a menu module. According to the invention, an actual circuit diagram of a signal is strictly designed; and extracting wiring connection relation data from theactual circuit diagram to design the normal sequence design of the wiring diagram, and outputting a design result that each connecting line of the circuit diagram and each wiring line in the wiring diagram have a one-to-one correspondence relationship, thereby facilitating drawing audit, on-site installation and debugging of equipment and daily operation and maintenance.
Owner:CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP

Data sending and receiving methods and equipment, and data transmission method and system

The invention discloses a data sending and receiving method and device and a data transmission method and system, and relates to the communication technology. The method comprises the following steosof splitting long data to be sent into a plurality of data packets; adding a packet header to each data packet, wherein the packet header comprises a header, a data length, a packet number and a packet index; when the data is sent, the data packets are sequentially sent according to the normal sequence of the packet indexes; when a new header and an initial packet index appear in data receiving and the last long data is completely received, responding to a first return command fed back by a receiving end, and sending a next data packet according to a normal packet index sequence of the currentlong data; when a new header and a non-initial packet index appear in data receiving and the previous long data is completely received, responding to a second return command fed back by the receivingend, and sending a next data packet according to the sequence of the initial packet index of the current long data; The whole data sending process is more optimized, and information loss caused by data splitting sending due to packet loss and packet leakage can be avoided.
Owner:SUZHOU GOLD MANTIS EXHIBITION DESIGN ENG
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