363results about How to "Improve protection efficiency" patented technology

The invention discloses a porcine pseudorabies virus virulent strain, and a gene deletion vaccine strain thereof and applications thereof. The porcine pseudorabies virus virulent strain is named as HeN1, the microbial preservation number of the porcine pseudorabies virus virulent strain is CGMCC NO.6656, the deleted gE gene obtaines the gene deletion vaccine strain rPRV-gE-EGFP+ on the basis of the virulent strain HeN1, and the microbial preservation number is CGMCC NO.6657. The virulent strain can be prepared into inactivated vaccine (single vaccine or combined vaccine), the gene deletion vaccine strain rPRV-gE-EGFP+ can be prepared into activated vaccine or inactivated vaccine (single vaccine or combined vaccine) and the like, so that porcine pseudorabies can be effectively prevented or cured, or the gene deletion vaccine strain rPRV-gE-EGFP+ can be prepared into a diagnosis reagent for diagnosing the porcine pseudorabies. The gene deletion vaccine strain rPRV-gE-EGFP+ has the advantages of being good in safety, high in protection efficiency, beneficial to differential diagnosis.

An assembly providing a first annular shield including a sleeve portion integral with a rotating member and with a flange portion, which radially extends to protrude from the first sleeve portion; a second annular shield having a sleeve portion integral with a stationary member and with a flange portion that radially extends to protrude on the opposite side of the sleeve portion of the first shield and facing the flange portion; and an annular seal, which the flange portion of the first shield ends with an L-shaped annular portion that protrudingly radially and axially extends out of an annular gap delimited between the rotating and stationary members to define an L-shaped channel in radial section having constant width and forming a first labyrinth seal; the channel leads into an annular recess, delimited between the second shield and a first lip of the annular seal without contacting the first shield.

The invention discloses a translational energy-absorbing seat for protecting the neck during rear-end collision and belongs to the technical field of automotive passive safety. A seat translational energy-absorbing mechanism is arranged on a slideway of a conventional automobile seat; and the mechanism is arranged under a seat cushion and symmetrically arranged on two sides of the seat. During rear-end collision, the provided translational energy-absorbing mechanism can make the seat and the passenger translate a certain distance backward under the action of a certain constraint force, and reduce relative motion of the trunk and the head of the passenger. Therefore, the neck injury to the automobile passenger during rear-end collision is effectively reduced. Meanwhile, the translational energy-absorbing seat overcomes the defect that the conventional passenger neck protecting seat during rear-end collision has heavy weight, high cost, narrow rear-end collision speed range, and the like, and has better application prospects.

The invention provides a DNA5-methylcytosine and 5-hydroxymethylcytosine genome sequencing method, comprising the following steps: (1), purifying and fragmentation pretreating DNA: extracting targeted DNA, breaking it into fragments having an average length of 50 nucleotides to 10000 nucleotides; (2), repairing trace DNA and connecting linker-adaptors: repairing and connecting pretreated DNA fragments to sequencing linker-adaptors required for next-generation sequencing; (3), covalently labeling 5-methylcytosine and 5-hydroxymethylcytosine; (4), enriching in solid phase DNA fragments of labeled 5-position modified cytosine, and in the solid phase, amplifying with PCR (polymerase chain reaction) amplimers of the corresponding linker-adaptors; purifying obtained PCR products to obtain a distribution map of genome 5-position modified cytosine required for next-generation sequencing. The invention greatly enhances bonding selectivity and efficiency of solid phase surface with DNA modified bases.

Two transmission devices connected to a link in which a failure occurs turn back a ring. Other transmission device changes a transmission ring of an NNI packet which is a UNI packet whose transmission source is its own transmission device and which had been transmitted through the link before the failure occurs to have a reverse direction. In addition, each transmission device, upon receiving an NNI packet whose transmission destination NNI address is one or any one of a plurality of NNI addresses applied to its own transmission device, outputs the packet to a self-owned tributary port irrespectively of whether it is sent through an inner ring or an outer ring.

An ESD protection circuit includes a detection circuit for detecting an ESD current and a bypass circuit for bypassing the ESD. The detection circuit and bypass circuit are connected to a first pad and a second pad. The bypass circuit is connected to an output terminal of the detection circuit. The bypass circuit comprises a MOS transistor, a first bipolar transistor and a second bipolar transistor. The drain of the MOS transistor, the collectors of the first bipolar transistor and the collector of the second bipolar transistor are connected to the first pad. The source and the substrate of the MOS transistor and the emitter of the second bipolar transistor are connected to the second pad. The base of the first bipolar transistor is connected to the gate of the MOS transistor and the emitter of the first bipolar transistor is connected to the base of the second bipolar transistor.

The invention belongs to the field of anticorrosive coating, and in particular, relates to a graphene/deimpurity polyaniline-containing anticorrosive coating. The anticorrosive coating is composed of the following raw materials in parts by weight: 20-80% of epoxy resin, 5-15% of a graphene/deimpurity polyanilin composite material, 5-10% of a zinc powder, 5-10% of a filler, 1-10% of a coloring pigment, 0.1-3% of a dispersion agent, 0.1-3% of a wetting agent, 0.1-3% of a thickening agent, 0.1-1% of a levelling agent, 0.1-1% of a defoaming agent, 0.1-1% of a bactericide, and 1-35% of water. In the preparation process of the anticorrosive coating, polyaniline is loaded on graphene by an in-situ polymerization method, so that the dispersion of polyaniline is improved, polyaniline agglomeration is avoided, and the graphene/deimpurity polyaniline-containing anticorrosive coating is prepared.

The invention discloses a method and a device for networked protection of a microgrid. Voltage and current information of a line is collected through intelligent electronic devices (IEDs) dispersedly installed on a main transformer, a bus and two sides of a power grid line; a main power grid is judged to break down or not according to a set fault detection method; operating states of the main power grid and the microgrid are monitored continuously when the main power grid is judged to operate normally, a networked monitoring system is put into operation when the main power grid is judged to break down, the intelligent electronic devices (IEDs) first judge a line on which a fault occurs according to fault direction information, and then send fault judgment information to a protection control host. According to the invention, real-time monitoring is carried out on the microgrid by adopting a networked protection system, thereby enabling the microgrid protection to become an organic unity, coordinating with each other, realizing protection for the selectivity, the rapidity, the sensitivity and the reliability of the microgrid, ensuring safe and stable operation of the microgrid system, and improving the utilization rate and the reliability of distributed generation (DG).

The invention discloses a method and device for achieving data protection. The method includes the following steps that when an IO request is intercepted, information of the IO request is extracted, and whether data of the IO request are valid or not is judged according to the extracted information of the IO request, wherein the IO request includes the information of the IO request and the data of the IO request; when the data of the IO request are valid, the data of the IO request are stored in a disk corresponding to the information of the IO request; a bitmap identification of a data block where the data of the IO request are stored is set to have been changed; data on the data block with the changed bitmap identification is transmitted to a log volume corresponding to the disk and stored on the log volume corresponding to the disk in a secondary index mode. The problem of repeated copying of data is solved by monitoring changes of each IO and changes of the bitmap identification, and therefore data protection efficiency is improved.

The invention provides an SCR (Silicon Controlled Rectifier) structure for providing ESD (Electro-Static discharge) protection for an I/O (Input/Output) port of an integrated circuit under all modes, belonging to the technical field of electronics. The SCR structure comprises a P well region on the surface of a substrate, two N well regions, three P+ regions and five N+ regions. The P well region is sandwiched between the two N well regions; the first N+ region and the first P+ region are located in the first N well region and are connected with the I/O port of an external chip; the second N+ region and the second P+ region are located in the second N well region and are connected with a VDD (Voltage Drain Drain) track of a power source of the external chip; the third N+ region and the third P+ region are located in the P well region and are connected with a VSS (Voltage Series Series) track of the power source of the external chip; the fourth N+ region is located at the joint area of the first N well region and the top of the P well region; the fifth N+ region is located at the joint area of the P well region and the top of the second N well region; and a first and a second polysilicon regions are located on the surface of the P well region and are connected with the VSS track of the power source of the external chip. According to the invention, one single device is utilized to provide ESD protection for the I/O port under all modes, the occupying area of the protected device in the chip is effectively reduced and the parasitic capacitance is effectively reduced.

The invention provides a user account protection method which comprises the following steps: detecting information related to a user account regularly by use of a server; and when detecting that the information related to the user account is preset abnormal information, performing protective treatment on the user account according to the preset protection grade corresponding too the preset abnormal information. Furthermore, the invention also provides a user account protection device. The user account protection method and the user account protection device can be used for improving the user account protection efficiency.

The invention relates to the technical field of swine pseudorabies viruses, and relates to a swine pseudorabies virus variant XF-1 strain, a preparing method thereof and applications of the strain. The accession number of the variant is CCTCC NO V201654. The swine pseudorabies virus variant (the XF-1 strain) is adopted to prepare an inactivated vaccine, and safety and immunoprotective experiments are performed. Results prove that the swine pseudorabies virus variant (the XF-1 strain) inactivated vaccine has good safety, and that the immunoprotection efficiency of the inactivated vaccine is obviously higher than that of other immune groups, and therefore the virus strain is proved to have good immunogenicity, can be used for vaccine research and development for the swine pseudorabies, and has a food vaccine development prospect.

The invention discloses a wavelength division multiplexing passive optical network optical line terminal having a shared protection function. The outside of the optical line terminal is provided with two ports, namely a primary port and a backup port; the inside of the optical line terminal comprises a primary optical transceiver module, a backup optical transceiver module and a control module as well as a 2*2 optical path switching module for optical path selection and switching; wherein the control module is connected to the primary optical transceiver module and the backup optical transceiver module, the number of the optical transceiver units of the backup optical transceiver module is not more than that of the optical transceiver unit needed to be protected by the primary optical transceiver module, at least light sources of part of optical transceiver units are wavelength-adjustable light sources; the primary optical transceiver module and the backup optical transceiver module are respectively connected with the primary port and the backup port through the 2*2 optical path, and the control module is also connected to a control end of the 2*2 optical path connected with the backup port; the control module is connected with the primary optical transceiver module and the backup optical transceiver module; and a light source of at least part of optical transceiver units of the backup optical transceiver module adopts a wavelength dimmablelight source. The optical line terminal provided by the invention can realize the protection to all wavelength optical transceivers in the wavelength division multiplexing passive optical network optical line terminal at the low cost of a redundant device, can realize the fault protection switching to a feeder line fiber and the local recovery to local faults of a distribution fiber, and even canrealize the recovery of a plurality of concurrent faults in a network when used in the network having double-fiber backups.

The present invention discloses a method and a device for denial-of-service simulation attack and a computing device, belonging to the technical field of computers. The method comprises the steps of:determining an intercepted attack packet in the last round of denial-of-service simulation attack process; employing the intercepted attack packet to perform training of a protection prediction modelto obtain a trained protection prediction model, wherein the protection prediction model is configured to predict a protection policy employed by a protection node; and performing the next round of denial-of-service simulation attack through the trained protection prediction model. Through adoption of a mode of employing the intercepted attack packet at the last round to perform training and learning of the protection prediction model and employing the trained protection prediction model to perform the next round of the denial-of-service simulation attack, the accuracy of the protection policyprediction is improved through a machine self-learning mode so as to improve the effectiveness of the simulation attack and the simulation attack efficiency.

A downlink level shifting circuit includes a high side input network, a common gate voltage-withstanding structure and a low side latch circuit; the high side input network consists of two parallel PMOS devices of a common source structure, and transmits an input signal to the common gate voltage-withstanding structure; the common gate voltage-withstanding circuit includes a pair of common gate PMOS transistors, a pair of common gate NMOS transistors and two clamp diodes; and the low side latch circuit includes two pairs of NMOS transistors used as linear resistors and a latch structure formedby a pair of cross-coupled NMOS devices, and enables a high-side signal to be transmitted to a low-voltage region when a high-side voltage difference is very small.

An arrangement including a first and second sealing assembly disposed between an inner ring and an outer ring of the wheel hub and straddling the wheel hub and an outer ring of a constant velocity joint, and an annular step formed on the side of the constant velocity joint on a radially outer lateral surface of the inner ring, in a position adjacent to a sleeve portion of a first shield of the first sealing assembly from a flange portion radially extends so as to protrude towards the outer ring, the flange portion being provided towards the constant velocity joint with a signal generating element (19) consisting of an annular insert; an end of a tubular core of the second sealing assembly is fitted angularly onto the step and is radially externally provided with an L-shaped edge arranged within the step and radially under the annular insert.

The invention relates to a separation method for a flake graphite ore and belongs to the technical field of mineral processing. The separation method is conducted according to the following steps that graphite ore materials are fed into a sieving machine to be graded, and oversize coarse-grained products and undersize fine-grained products are separated; the oversize coarse-grained products are fed into a crusher to be crushed to obtain crushed materials; the crushed materials are mixed with the undersize fine-grained products to obtain mixed materials; the mixed materials are fed into an air flow separator to be separated, and coarse concentrate and coarse tailings are obtained; the coarse concentrate is fed into a large flake graphite flotation system to be finely separated, and large flake graphite concentrate and middling products are separated; the middling products and the coarse tailings are mixed and fed into an ore grinding machine to be subjected grinding-up treatment, and ground coarse tailing products are obtained; and the crushed coarse tailing products are fed into a small flake graphite flotation system to separate fine-grained graphite concentrate and tailings. Compared with the prior art, the separation method for the flake graphite ore based on the air flow separator and a flotation machine has the characteristics of being high in protection efficiency of graphite piece diameters, little in investment, little in environmental pollution, remarkable in economic benefit and the like.

The invention discloses an encrypted code operation method and device, a storage medium and a terminal, relates to the technical field of information security, and mainly aims to solve the problem that core codes needing to be protected cannot be strictly protected due to the fact that decrypted codes can be obtained through reverse analysis in existing code protection. The method mainly comprisesthe steps that a code conversion table is extracted, the byte codes are interpreted into executable character strings and instruction symbols through the code conversion table, codes corresponding tothe character strings and the instruction symbols are compiled and run through a virtual machine, and the byte codes corresponding to the different character strings and the instruction symbols are stored in the code conversion table. The invention is used for running for encrypted code.

The invention provides a construction method for delaying attenuation and increasing an expression exogenous antigen salmonella suipestifer carrier through regulation and control of gene, which is characterized in that receptor bacterium C78-3 is combined with manA, crp, relA and asd -containing deleted suicide carrier escherichia coli donor bacterium, mutants delta manA, delta Pcrp: : TT ara C PBAD crp, delta relA: : araC PBAD lacI TT and delta asd A are introduced in wild-type salmonella suipestifer C78-3, the introduced salmonella suipestifer after mutation can be called x0011; and four types of mutation enable phenotype identification. The method of the invention makes salmonella suipestifer to become safe and effective vaccine carrier of many exogenous antigens; and provides the delaying attenuation and increasing expression exogenous antigen salmonella suipestifer carrier through regulation and control of gene for various pig diseases, especially many bacteria diseases of pig, and has great market applicability.

The invention belongs to the technical field of veterinary biology, and particularly relates to a colon bacillus outer membrane protein monoclonal antibody and a preparation method and an application thereof. The antibody is prepared by taking cloned, expressed and purified taking avian pathogenic escherichia coli 78 (APECO78) outer membrane protein as an antigen immune BALB/c mouse with a hybrid tumor technology. The antibody has high specificity and high sensitivity, and an experimental basis is laid for future rapid and specific detection of colon bacillus infection with an immunology method. Meanwhile, as proved by an experiment, the monoclonal antibody disclosed by the invention has high neutralizing activity and protecting efficiency on colon bacillus infection of the same type, and can be used for preventing colibacillosis.