28results about How to "Security advantage" patented technology

The invention discloses a method for constructing recombinant hansenula polymorpha for efficiently producing canine serum albumin and an expression method of the recombinant hansenula polymorpha. Based on a natural sequence of a canine serum albumin gene, a codon of the canine serum albumin gene is optimized, so that the canine serum albumin gene is more suitable for being expressed in hansenula polymorpha, an optimal promoter of the sequence expressed in hansenula polymorpha is further screened, and the copy number of the canine serum albumin in hansenula polymorpha is optimized. The yield of the canine serum albumin hansenula polymorpha strain obtained by recombinant transformation can reach 0.8-0.9 g / L after 6 days of high-density fermentation production in a fermentation tank.

The invention belongs to the field of quantum cryptography, and relates to a quantum secret sharing method based on lattice cryptography and random base, comprising the following steps: a secret distributor generates a public key, a private key share and a verification key through a key generation algorithm; encrypting the secret by using the public key to generate a ciphertext; broadcasting the ciphertext to all participants and a secret reconstructor; each participant performs partial decryption on the ciphertext and calculates a shadow corresponding to a decryption value; embedding the shadow and the random number into information particles by adopting unitary operation; a secret restorer calculates the sum of all shadows by measuring the extracted information particles, and removes noise items to obtain a restored secret; verifying whether the recovered secret is correct or not by adopting a hash function; when the participant changes, the secret distributor executes key retransmission, generates a new private key share by re-segmenting elements in the private key vector, and re-distributes the new private key share to the participant; according to the invention, the resource consumption and communication consumption of the scheme are effectively reduced, and the overall efficiency is improved.

The invention relates to the technical field of capacitor electrode material preparation, in particular to a sulfur-doped nickel-manganese layered double hydroxide electrode material, a preparation method and a capacitor, and the preparation method comprises the following steps: growing sulfur-doped nickel-manganese layered double hydroxide on foamed nickel by using a simple and feasible one-step hydrothermal method; oxygen vacancies are introduced into the electrode material through a safe and harmless chemical reduction method; wherein the layered double hydroxide has a relatively large specific surface area and rich active sites, so that permeation of electrolyte and diffusion of ions are facilitated; through combination of sulfur doping and oxygen vacancy, the electronic structure of the electrode material can be synergistically optimized, and the electrolyte adsorption capacity and the electronic conductivity of the electrode material are enhanced. The problems that in the prior art, due to the fact that transition metal layered double hydroxides are low in electric conductivity and poor in electron transmission efficiency, actual energy density and power density are low, and cycling stability is poor are solved.

The invention provides a trusted online and offline federated learning method and system based on Shamir secret sharing, and relates to the technical field of distributed computing and cryptography. The method comprises the following steps: a secret key generation center distributes a secret key for a newly registered user; the model requester determines a threshold value according to a task demand, selects a secret value, performs secret segmentation according to the total number of pre-distributed data providers, and transmits a secret share to the server; the data provider trains a local model by using local data, encrypts the local model by using a public key of a model requester, and sends a ciphertext parameter to the server; the server performs secret recovery on the secret share; if the number of the obtained secret shares exceeds the threshold value requirement, the secret is recovered successfully, and model parameters are aggregated and sent to a model requester; otherwise, the server continues to wait until the number of the obtained secret shares reaches the threshold value requirement. The method has remarkable advantages in the aspects of data privacy, model security and calculation complexity.

The invention discloses recombinant hansenula polymorpha for efficiently producing cat serum albumin and an expression method of the recombinant hansenula polymorpha. According to the method, an expression cassette of the cat serum albumin is integrated in hansenula polymorpha, and a promoter in hansenula polymorpha is optimized, so that the serum albumin is expressed by a constitutive promoter and a sucrose inducible promoter independently or in a combined manner, and the copy number of the serum albumin is further optimized; the stable and efficient expression of the cat serum albumin gene in hansenula polymorpha is successfully realized. The high-density fermentation yield of the recombinant cat serum albumin fermented by using the engineering bacteria can reach 1.7-2.2 g / L.

The invention belongs to the technical field of microorganisms, and relates to a bifidobacterium breve strain capable of relieving constipation, the strain is bifidobacterium breve Bb-PG-14, the classification name of the strain is Bifidobacterium breve, the preservation number is CGMCC No.31861, the preservation time is September 4, 2024, the preservation unit is China General Microbiological Culture Collection Center, the preservation number is CGMCC No.31861, the preservation number is CGMCC No.31861, the preservation number is CGMCC No.31861, the preservation number is CGMCC No.31861, the preservation number is CGMCC No.31861, and the preservation number is CGMCC No.31861. The address is No.3, Yard 1, Beichen West Road, Chaoyang District, Beijing. The strain is separated and purified from excrement of healthy babies, has relatively strong acid resistance, alkali resistance, cholate resistance and artificial simulated gastrointestinal fluid tolerance, and has the characteristics of probiotics.

The invention discloses a cross-chain identity privacy protection method based on casual transmission, and the method is characterized in that the method comprises the following steps: S1, employing a negotiation key designed based on a peninsula group replaceable rational function, so as to guarantee that a supervision mechanism and a local enterprise can safely negotiate the key; and S2, when the supervision mechanism carries out identity attribute compliance check on the local enterprise on the local chain, a cross-chain communication scheme based on the casual transmission technology is adopted to realize cross-chain identity authentication. The invention relates to the technical field of identity privacy protection, in particular to a cross-chain identity privacy protection method based on casual transmission. The technical problem to be solved by the invention is to provide a cross-chain identity privacy protection method based on casual transmission, so that on the premise of ensuring the security of a supervision mechanism in a regional stock exchange market, the security authentication and compliance check of identity information of local enterprises on a local chain can be carried out in a cross-chain manner. The method has higher security and is suitable for a plurality of fields such as finance and the like.

This utility model discloses a rotating device for cable winding, belonging to the field of cable processing technology. It includes two sets of parallel and symmetrically arranged supporting rotating mechanisms and a winding reel. The housing of each supporting rotating mechanism contains two sets of supporting rollers that can move axially. The sidewall flange of the winding reel is rotatably connected to the outer walls of the two sets of supporting rollers. At opposite ends of the two sets of supporting rotating mechanisms, two sets of clamping rotating mechanisms are respectively arranged. Each clamping rotating mechanism includes a height-adjustable movable base and a clamping drive assembly installed at the telescopic end of the movable base. The movable base can drive the limiting guide post of the clamping drive assembly to engage with the connecting plate, thereby causing the clamping drive assembly to drive the winding reel to rotate synchronously. This utility model uses two sets of supporting rotating mechanisms installed on the ground to support the cable winding reel, making the winding reel more stable and simplifying the installation and disassembly process, thus improving operational convenience.

The invention provides a CRISPR-Cas9 near-infrared two-region precise light-operated editing system delivery carrier based on an erythrocyte membrane, a preparation method and application, and particularly, the CRISPR-Cas9 gene editing system delivery carrier provided by the invention has the advantages of low cytotoxicity, efficient transfection, high yield, targeting property, space-time controllability, easiness in large-scale production and multifunctionality. Compared with a traditional liposome transfection reagent, the carrier shows lower cytotoxicity, protects the CRISPR / Cas9 compound from being influenced by the in-vivo environment, and ensures that the CRISPR / Cas9 compound is smoothly delivered to target cells. By embedding a specific targeting receptor, efficient targeting delivery is realized, and the pertinence and effectiveness of treatment are improved. And by combining a near-infrared two-region material, the time-space precise control of a CRISPR / Cas9 system is realized, and deeper tissue penetrating power and smaller biotoxicity are achieved. The preparation process is simple, the method is suitable for industrial production and clinical transformation, and new possibility is provided for gene therapy and personalized medical treatment.

The present invention relates to the field of microorganisms, and specifically to providing a new functional lactic acid bacteria expressing ETEC antigens, and a preparation method and application thereof. The recombinant Lactobacillus plantarum expressing ETEC antigens uses Lactobacillus plantarum NC8 as a host bacterium and a pPG612.1 expression vector, wherein the pPG612.1 expression vector contains the FaeC gene or LngC gene of ETEC. The present invention innovatively integrates the FaeC and LngC genes of ETEC into Lactobacillus plantarum NC8 for expression, and can activate the intestinal mucosal immune response by oral administration, which can not only directly counteract the intestinal damage caused by ETEC and protect the intestinal villus structure, but also can regulate the intestinal microenvironment, stimulate the body to produce a systemic immune response, improve the body's ability to resist ETEC infection, reduce the morbidity and mortality of ETEC infection, and thus improve the economic benefits of the pig farming industry.

The present application relates to a kind of selective deoxidation chlorination method of alcohol compound, belong to the technical field of organic synthesis.The method uses the solid chlorinating agent shown in structural formula (I), under the joint action of organic solvent and base, it is reacted under mild conditions at 0-50 ℃, at least one hydroxyl group in alcohol compound can be converted into chlorine atom with high efficiency and high selectivity.The stability of the used chlorinating agent is good, and the safety is high, and it is convenient to store and transport, which overcomes the use limitation of traditional chlorine, sulfonyl chloride and other high-risk reagents.The method is suitable for primary, secondary and tertiary hydroxyl groups, has the advantages of short reaction time, simple operation and wide substrate applicability, and the obtained chlorinated product can be used as an important pharmaceutical and chemical intermediate.The present application effectively solves the problems of existing chlorination method, such as high toxicity, low selectivity and harsh reaction conditions, and has good application prospect.

The invention discloses a broadband impedance online measurement method and system for a power grid side and an equipment side, electronic equipment and a storage medium, and the method comprises the steps: respectively measuring a first voltage and a first current at a common point when a disturbance current is injected at the power grid side and the equipment side; calculating a second voltage and a second current under the disturbance current value when the disturbance current is not injected; the impedance is a ratio of a voltage difference and a current difference, the voltage difference is a difference between the first voltage and the second voltage, and the current difference is a difference between the first current and the second current. According to the method, under the condition that a power system operates normally, the FFT algorithm and the impedance calculation method are combined, the power grid side impedance and the equipment side impedance are measured at the same time, and the stability margin of the system can be analyzed on line according to the impedance measurement result.

The utility model relates to the technical field of constructional engineering, and provides a UHPC light side ditch cover plate which comprises a UHPC panel, a wave-shaped stiffening rib and a plurality of adjustable supporting bases, the UHPC panel comprises an anti-skid layer, a force bearing layer and an anti-crack layer which are arranged from top to bottom, the wave-shaped stiffening rib is arranged at the bottom of the UHPC panel, and the anti-skid layer is arranged at the bottom of the UHPC panel. The wave-shaped stiffening ribs comprise wave-shaped continuous structures arranged on the two sides of the UHPC panel in the length direction, a plurality of straight panel connecting ribs are connected between the two wave-shaped continuous structures, and the multiple supporting bases are arranged at the bottom of the cover plate and used for adjusting the height of the cover plate. According to the scheme, the problems that a traditional side ditch cover plate is large in dead weight, high in maintenance cost and the like are solved, remarkable technical advantages are formed in the aspects of safety, durability, economical efficiency and the like, construction is facilitated, and good application prospects are achieved.

The present invention relates to a system for encoding and correcting the polarization state of the BB84 protocol that implements a method of measuring polarization errors based on performing measurements prior to an information transmission step, which method is applicable to any system in which quantum key distribution (QKD) is to be implemented.

The utility model provides a conductive structure of a sound wave motor and an electric toothbrush, and belongs to the field of electric toothbrushes, the conductive structure comprises a sound wave motor body, a hollow conductive motor shaft and a conductive assembly, the motor shaft of the sound wave motor is of a hollow conductive structure, and the interior of the motor shaft serves as a wiring channel; the conductive assembly penetrates through the body from the central axis of the crankshaft to be externally connected to form a first conductive circuit, and the motor shaft of the conductive assembly serves as a second conductive circuit through the conductivity of the conductive assembly. The two ends are respectively connected with an electric element and a power supply to form an access; the characteristics of the structure of the sound wave motor are fully utilized, and only the crankshaft needs to be arranged in a hollow manner without greatly modifying the structure of the motor; the first power connection output end and the second power connection output end are both integrated on the motor shaft, although the motor vibrates in a high-frequency reciprocating mode, the power connection efficiency is not affected, additional wiring layout is not needed, the two output ends can be installed in an external assembly mode, and the motor has the advantages in safety and convenience.

An ophthalmic preparation for treating macular edema, optic neuritis and non-infectious endophthalmitis. The ophthalmic preparation is a preparation composed of an active ingredient for treating eye diseases and an ophthalmic preparation carrier or auxiliary material; the active ingredient for treating eye diseases is a glucocorticoid medicine and / or a non-steroidal medicine; the ophthalmic preparation carrier or auxiliary material comprises the following ingredients: a surfactant, an ionic polymer and a solvent, or the ophthalmic preparation carrier or auxiliary material contains the following ingredients: povidone with low polymerization degree, povidone with moderate polymerization degree and a solvent. The ophthalmic preparation can carry (wrap) the glucocorticoid and / or the non-steroidal medicines to penetrate through the anterior segment of eyes and be conveyed to the posterior segment of eyes to treat the macular edema, the optic neuritis and the non-infectious endophthalmitis in an eye drop administration mode, and the ophthalmic preparation has extremely excellent clinical use value and positive social significance.

The invention discloses a method for distinguishing attacks and faults of a catalytic cracking fractionation system, and belongs to the field of industrial control system information security. The method comprises the following steps: firstly, extracting abnormal states of system information domain equipment nodes and physical domain variable nodes, splicing multi-domain abnormal characteristics and then training a KNN model; the modes of the system in attack, fault and normal states are learned; and finally, carrying out online attack and fault discrimination by using the trained KNN model. According to the method, the behavior characteristics of attacks and faults can be comprehensively described by extracting the multilateral characteristics of the information domain and the physical domain, the limitation that abnormal reasons are analyzed only from the perspective of the physical process is overcome, and the distinguishing accuracy can be effectively improved; in addition, the KNN model can effectively reduce the discrimination error problem caused by intersection of individual samples of attack classes and fault classes.

The utility model discloses a child seat with an adjustable backrest length. The child seat comprises a seat assembly. The backrest piece can rotate relative to the seat assembly so as to adjust the inclination angle of the backrest; the backrest telescopic part is mounted on the backrest part in a sliding manner and is used for adjusting the effective length of the backrest; one end of the connecting belt is connected with the backrest telescopic piece, and the other end of the connecting belt is connected with the seat assembly; one end of the reset piece is connected with the backrest telescopic piece, and the other end of the reset piece is connected with the backrest piece or the seat assembly; the connecting point of the connecting belt and the seat assembly is different from the rotating point of the backrest piece and the seat assembly; when the backrest piece rotates, the backrest telescopic piece can slide relative to the backrest piece through cooperation of the connecting belt and the reset piece, and the effective length of the backrest is automatically adjusted. Through the synergistic effect of the connecting belt and the reset piece, the backrest telescopic piece can automatically slide along with rotation of the backrest piece, the effective length of the backrest is automatically adjusted, and comfort and convenience are improved.

The invention discloses a nitrendipine and polyvinylpyrrolidone co-amorphous substance, the weight ratio of nitrendipine to polyvinylpyrrolidone is 1: 1, and compared with nitrendipine, the nitrendipine and polyvinylpyrrolidone co-amorphous substance has higher solubility, dissolution rate and stability.

The utility model introduces a car washing robot control system and an intelligent bus washing robot, the core of the system is controlled by a main controller, and the system is responsible for receiving data and sending an instruction; the positioning function is jointly completed by a laser radar navigation module and an inertial measurement unit IMU, and it is ensured that the robot can perform automatic path planning and high-precision positioning at a bus stop; the safety unit guarantees the safety of the robot during walking through multiple mechanisms such as laser radar obstacle avoidance and ultrasonic induction; the man-machine interaction module realizes visual operation and state display through equipment such as a touch screen and a warning lamp; the power supply unit not only stably supplies power, but also supports automatic charging; the execution unit is composed of a walking motor driving module, a steering motor driving module and a working motor driving module to ensure efficient execution of the robot; in conclusion, the control system shows obvious advantages in positioning, safety, interaction, power supply and execution efficiency, and makes an important contribution to promoting the car washing robot technology and improving the user experience.

The invention discloses a high-voltage connector, and the connector comprises a plugging assembly which comprises a housing and a terminal structure, and the terminal structure is disposed in the housing; the wire harness assembly comprises a flexible connecting bar, one end of the flexible connecting bar extends into the shell and is conductively connected with the terminal structure, the other end of the flexible connecting bar is fixedly connected with a hard rod, the hard rod comprises flat parts and a cylindrical part, and the flat parts are arranged at the two opposite ends of the cylindrical part; the protection assembly comprises a shielding piece, a sealing plate and a wire sealing body, the shielding piece, the sealing plate and the wire sealing body are sequentially arranged at the end, close to the plugging assembly, of the hard rod, the cylindrical part is sleeved with the shielding piece, the sealing plate and the wire sealing body, an insulation sleeve is arranged between the hard rod and the inner wall of the shell, and the outer diameter of the insulation sleeve is matched with the inner diameter of the shell. According to the high-voltage connector, the overall weight of the high-voltage connector is effectively reduced, the current-carrying capacity is improved, and meanwhile, the influence of external environmental factors on an internal circuit is effectively prevented, so that the stability and the safety of the connector are improved.

The invention discloses a single-double combined boom structure of a crane, which comprises a lower boom section, an upper boom section and a transition joint, the lower boom section is of a double-arm structure, the two sides of the lower boom section are symmetrical, and the upper boom section is of a single-arm structure; the arm support lower section is formed by sequentially connecting a root part, a root part section and a lower section standard section, and the arm support upper section is formed by sequentially connecting an upper section standard section and a head section; the upper arm support section and the lower arm support section are connected through a transition joint. The upper section of the single-double combined cantilever crane structure is the single arm, the lower section of the single-double combined cantilever crane structure is the double arms, the transition joint is arranged at the transition position of the single arm and the double arms, lateral stability is good, and meanwhile arrangement of a connecting beam is avoided. Compared with a single-arm boom, the lateral stability of the single-arm and double-arm boom structure is better, the self weight of the single-arm and double-arm boom structure is lighter, and the single-arm and double-arm boom structure has obvious advantages in the aspects of technical feasibility, safety, economical efficiency and the like; each rod of the transition joint adopts a circular tube section, and the transition joint is symmetrically arranged in structure and is compact in structure and reasonable in force transmission.

The present invention relates to the technical field of scaled verification aircraft, specifically to a scaled verification aircraft with an active double-throat jet vector nozzle, comprising: an airframe structure, wherein a flight combination control system is arranged inside the airframe structure; a landing mechanism; an emergency parachute recovery mechanism, comprising a parachute recovery unit, wherein a steering gear controller of the parachute recovery unit is connected to the flight combination control system in communication; a servo rudder system, which is connected to the flight combination control system in communication; a digital navigation system, which is used to exchange flight data of the verification aircraft during operation and control the navigation information of the verification aircraft in real time with the flight combination control system; a power system, comprising a power mechanism, an oil supply mechanism, a jet mechanism and a vector nozzle structure, wherein the power mechanism is connected to the flight combination control system in communication, and the vector nozzle structure adopts an active double-throat jet vector nozzle structure. The present invention solves the problem that the existing verification aircraft is usually verified in a wind tunnel environment and cannot obtain the actual flight environment.

The invention discloses a carbon-coated pre-magnesium silicon monoxide negative electrode material and a preparation method thereof, the negative electrode material comprises a silicon core, a silicon-magnesium composite porous layer and a carbon-coated layer, the silicon-magnesium composite porous layer comprises MgSiO3 and Mg2SiO4 with porous characteristics, and the porosity is not less than 30%; the material shows a unique peak position and intensity relationship in an XRD diffraction pattern, and Mg2SiO4 is used as a main phase. According to the preparation method, through molten salt mediated low-temperature solid-phase reaction and addition of reducing gas during heat treatment, energy consumption is greatly reduced, a generated Mg2SiO4 crystal structure is more stable than traditional MgSiO3, and a porous structure (porosity is larger than 30%) formed through the cooperation reaction enables the material to maintain high capacity of 1621.49 mAh / g, meanwhile, the first efficiency is improved to 85.91%, and the cyclic expansion rate is reduced by 40% or above.

The application discloses a kind of self-adapting micro-doppler corner point feature extraction method and device, comprising: it is proposed to use micro-doppler corner point feature to realize through-wall radar human behavior recognition, and gives a kind of self-adapting corner point feature extraction method based on Gauss difference convolution filter and deformable convolution network;Micro-doppler corner point feature is defined as the point that gray scale sharply changes in different directions in radar square distance-time image and square doppler-time image, reflects the inflection point of human body limb node's motion trajectory curve, stationary point, curve intersection and boundary;The corner point feature extraction method proposed uses Gauss difference convolution filter to extract micro-doppler corner point supervision label on simulation data, then trains μD-CornerDet model using these labels;Inference stage, only μD-CornerDet model is used to obtain corner point feature map for measured data;The application verifies the effectiveness and robustness of the proposed method through numerical simulation and measurement.

The utility model provides a counting device applied to winching and a winching mechanism. The counting device comprises a first linkage piece which is arranged on the hoisting mechanism and rotates along with the rotation of a winding drum of the hoisting mechanism; the device comprises a first linkage piece, an encoder and a transmission assembly, the encoder calculates the number of rotation turns of the first linkage piece through the transmission assembly, the transmission assembly comprises a second linkage piece and a linkage shaft which are fixedly connected, the first linkage piece is in transmission connection with the second linkage piece, and the linkage shaft is connected with the encoder. The counting device applied to the winch and the winch mechanism provided by the utility model have higher precision, stronger anti-interference capability, better high temperature resistance and higher safety, are more suitable for an intelligent system, and can better meet the requirement of counting the winch height of a crawler-type hoisting dynamic compactor.

The invention discloses an application of a magnetoelectric nanoparticle synergistic alternating magnetic field system in preparation of a periodontal tissue regeneration repair product under periodontitis treatment condition, the magnetoelectric nanoparticle comprises a shell structure with piezoelectric property and a core structure with magnetoelectric response property, and the magnetic field system is an external alternating magnetic field. According to the invention, a hydrothermal method and a sol-gel method are adopted to prepare the magnetoelectric nano-particles with the core-shell structure, and the magnetoelectric nano-particles have relatively high biocompatibility and safety. The treatment effect is further verified through in-vivo experiments, and the result shows that the magnetoelectric nanoparticle synergistic alternating magnetic field system can be used for periodontal tissue regeneration under the periodontitis treatment condition. Besides, the external alternating magnetic field parameters are low in frequency, mild and effective, the current magnetoelectric nano-particle research trend often adopts higher intensity to be applied to whole body or deep tissue, but the invention proves that even low-intensity and low-frequency stimulation is sufficient to generate an effective treatment effect on periodontitis. The method has important advantages on comfort and safety of patients in clinical dental treatment.

The present invention proposes a social worker robot simulation method for loan investment network fraud, which belongs to the field of artificial intelligence / social engineering. Specifically: first, set up a number of social worker robots with different attributes according to actual needs, and configure user attributes for each social worker robot; fill in the micro-loan application form on each loan platform according to the attribute value, and leave the personal information of the social worker robot to the fraudster; then, build a behavior, language and voice database that conforms to the basic personality of the social worker robot, as well as a fraud process archive; then, the social worker robot interacts with the fraudster, and retains all information in the database; when the fraudster induces the social worker robot to transfer money, the social worker robot sends a transfer failure picture with a Trojan program implanted, tracks the fraudster and traces the source and feeds back to the public security department. The present invention is simple to operate and has strong practicality, which greatly improves the implementation efficiency.