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187results about How to "Reduce the probability of leakage" patented technology

Dynamic password identity authentication method based on accidental character set

The invention relates to a dynamic password identity authentification method on the basis of a random character group, which includes the steps that: (1) a user password is selected and set up from a cipher character group composed of K characters; (2) a memory matrix of M multiplied by N is set up and each square of the memory matrix has a different character; (3) when an authentification request is transmitted, a computer or server generates a generator matrix corresponding to the memory matrix randomly, the cipher character group is arranged in the square of the generator matrix randomly, all the characters contained in the squares are all different to each other; (4) according to the specific position MN of the first digit character of the user cipher in the generator matrix, the user can find a character from the MN square of the memory matrix corresponding to the generator matrix and use the character as a first digit character of the dynamic password; thus a dynamic password can be formed in the similar way; (5) the authentification is finished: the computer or server judges if the dynamic password input by the user is correct. The invention has the advantages of simple principle, higher safety performance and easy generalization and so on.
Owner:张寄望

User terminal network authentication method and device

The invention discloses a user terminal network authentication method and device, which are used for solving the problems that equipment operation and maintenance cost is high and that the authentication efficiency and the authentication safety are not high in an authentication process of the user terminal access network. The method comprises the steps as follows: a first terminal encrypts identity information of the first terminal based on a physical layer sharing secret key generated through a channel characteristic parameter between the local and a base station and sends the encrypted identity information to a network server; a user authentication vector generated by the network server based on the identity information is received; network authentication is completed based on the user authentication vector; and the network server is triggered to notify other user terminals of the same group as the first terminal to perform network authentication by adopting the user authentication vector. By the adoption of the method, the terminal can encrypt the identity information of the terminal based on the physical layer sharing secret key generated through the channel characteristic parameter between the local and the base station and transmit the identity information; thus, the probability of terminal identity information leakage is reduced.
Owner:CHINA MOBILE COMM LTD RES INST +1

Data transmission method and device based on key authentication

The invention discloses a data transmission method and device based on key authentication. The method comprises the following steps: sending digital certificate information to a client by a server, and sending summary information of the digital certificate information and a combined unique identifier value including a handshake information context information identifier and a digital certificate information identifier to a key server; determining a private key corresponding to the digital certificate information by the key server according to the summary information, signing the combined unique identifier value by using the private key, sending a signature value to the server, and sending the signature value to the client by the server; and after the client verifies that the signature value is valid by using a public key corresponding to the digital certificate information, carrying out data interaction by the client and the server. According to the data transmission method provided bythe invention, the problem of the server that the private key must be deployed at the front end and the client executes TLS 1.3 handshaking is solved, and the private key and a certificate are deployed on different equipment, so that the server cannot read private key contents, thus the probability of private key leakage is reduced, and the safety of the private key is guaranteed.
Owner:GUIZHOU BAISHANCLOUD TECH CO LTD

Frequency conversion air conditioner for new energy passenger car

The invention relates to a frequency conversion air conditioner for new energy passenger car. A frequency conversion compressor is arranged at the middle part of an air conditioner, the two sides of the compressor are provided with a control unit and a power system; a condensation component is arranged at the front end of the air conditioner, the middle part is a condensation fan, and condensers are arranged at the two side in an inversed V shape; an evaporation component is arranged at the rear end of the air conditioner, the middle part is a return air inlet, the two sides are provided with an evaporation fan, and an evaporator is arranged between the evaporation fan and the return air inlet; the front end of the frequency conversion compressor is communicated with a four-way change valve by virtue of a check valve, the rear end is communicated with the four-way change valve by virtue of a gas-liquid separator, the four-way change valve is respectively connected with the condenser and the evaporator, and the condenser is connected with the evaporator by virtue of a drier and a bidirectional expansion valve; all pipelines are connected by adopting a welding way, all the electric components are connected and arranged in an overhead type structure, and only a power supply is externally connected with a control cable. The invention has the advantages that structure is compact, occupying space is small, and energy consumption is low, thus being applicable to new energy passenger car.
Owner:SONGZ AUTOMOBILE AIR CONDITIONING

A cast iron plate type air preheater

The invention discloses a novel cast iron plate-type air preheater. The air preheater provided by the invention is mainly characterized in that a cast iron heat transfer plate comprises a center plate, an upper fin, a lower fin, a connecting plate, four quadrangular prisms, two upper shift sideboards and two sinking sideboards, the upper shift sideboards are connected with the sinking sideboards by virtue of the quadrangular prisms, the vertical direction and horizontal direction of each quadrangular prism are respectively provided with a drawbar hole, and the two drawbar holes are not communicated; paired drawbar holes at the horizontal direction of the four quadrangular prisms are coaxial, and multichip cast iron heat transfer plates are laminated up and down; and the laminated positionof the two adjacent cast iron heat transfer plates is horizontally rotated 90 degrees, and multiple drawbars are connected with the cast iron heat transfer plates into a whole in series by virtue of the drawbar holes of the multichip cast iron heat-transferring plate. The air preheater provided by the invention is suitable for being used in flue gas waste heat recovery systems of various industrial furnaces and boilers, thereby ensuring the leakage rate of the air preheater to be less than 1%.
Owner:CHINA PETROCHEMICAL CORP +1

Integrated electro-hydraulic steering actuating unit and control method thereof

ActiveCN109131547AReduce the probability of leakageSteering linkage structure is omittedFluid steeringMotor driveControl signal
Disclosed are an integrated electro-hydraulic steering actuating unit and a control method thereof, wherein an externally inputted control signal controls a rotation direction and a rotational speed of a bi-directional servo motor, and the bi-directional servo motor drives a protruding direction and a protruding speed of an actuating cylinder. The control valve block assembly is used for maintaining the movement position of the oil cylinder when the two-way servo motor is stopped, and can be used for dissipating heat from the oil returning side oil to the closed oil tank when the oil cylinderis extended, so as to reduce the temperature of the oil. The control valve block assembly is capable of limiting the working pressure of the actuating cylinder when the temperature or load of the actuating cylinder changes suddenly, and is used for setting the maximum working pressure of the bidirectional gear pump, limiting the output power of the bidirectional gear pump, and preventing the bidirectional servo motor from being overloaded. The control valve block assembly can realize the communication between the two chambers of the actuating cylinder to be in the floating working state, whichimproves the safety of the integrated electro-hydraulic steering actuating unit under the emergency working condition.
Owner:BEIJING INST OF SPACE LAUNCH TECH +1

A buoyancy regulating system based on a two-way seawater pump

PendingCN108974294ASolve complex structuresSimplify structure and system compositionUnderwater vesselsUnderwater equipmentSeawaterBuoyancy regulation
The invention belongs to the technical field related to a submersible, which discloses a buoyancy regulation system based on a two-way seawater pump, The buoyancy regulating system comprises an adjustable ballast tank, two valve groups and a two-way seawater pump, wherein the two valve groups are a first valve group and a second valve group respectively; the two-way seawater pump is formed with anI port and an II port; the first valve group is connected with the adjustable ballast tank and the I port; the second valve group is connected with the II port and is communicated with seawater; Thebuoyancy regulation system adjusts the volume of sea water in the adjustable ballast tank adaptively through the positive and negative reversal of the two-way seawater pump, thereby realizing the buoyancy regulation; the valve group includes a one-way valve and balance valve connected in parallel; The one-way balance valve comprises a valve body, a one-way valve assembly and a balance valve assembly, wherein the one-way valve assembly and the balance valve assembly are respectively embedded at opposite ends of the valve body, and the one-way valve assembly and the balance valve assembly are mutually valve seats. The invention simplifies the structure, reduces the volume, and further reduces the complexity and cost of the buoyancy regulation system of the submersible.
Owner:HUAZHONG UNIV OF SCI & TECH

Prefabricated laminated slab and prefabrication process thereof

The invention discloses a prefabricated laminated slab and a prefabrication process thereof, relates to a building technology, and is used for solving the problem that a common laminated slab is easyto loosen in connection. The laminated slab comprises a slab body and a connecting structure. The connecting structure comprises an embedded block arranged on the slab body, an embedded groove formedin the slab body, a connecting hole formed in the slab body, a connecting block inbuilt in the embedded block and a connecting piece used for matching with the connecting block, the embedded block andthe embedded groove of two adjacent slab bodies are embedded with each other, and the connecting piece penetrate through the connecting hole and then is in threaded connection to the connecting block. The process comprises the following process steps of: building a frame, pouring and forming, demoulding and trimming, and building and maintaining. The prefabricated laminated slab has the followingadvantages and effects that the connecting structures can be used for being connected with each other in the process that two adjacent laminated slabs are spliced with each other, so that when the laminated slabs are subjected to the action of transverse force, the laminated slabs are not prone to being separated from each other, a pouring layer poured on the laminated slabs is not prone to beingseparated, and the purpose of reducing the leakage occurrence probability is achieved.
Owner:浙江大经住工科技有限公司

Extraction method of total saponin of Radix Ilicis Asprellae and quality detection method thereof

The invention discloses an extraction method of total saponin of Radix Ilicis Asprellae and a quality detection method thereof, and the extraction method comprises the following steps: taking a medicinal material of Radix Ilicis Asprellae root or stem, adding 4-12 times volume of 60% ethanol, extracting for 1.5-2h, adding 2-10 times volume of 60% ethanol, extracting for 1.0-1.5h, filtering and merging filtrate; concentrating under reduced pressure until no alcohol taste exists, adding water, diluting crude drug with the loading concentration of 0.1-0.5g / ml, and loading a pre-treated AB-8 macroporous resin column; washing the resin column to be cleared by water, and eluting by 60-80% of ethanol; and collecting eluent of 60-80% ethanol and concentrating under reduced pressure, drying to obtain the total saponin of Radix Ilicis Asprellae. The quality detection method comprises the steps of TLC chromatograph identification and content determination of ilexoside X XIX in the total saponin of Radix Ilicis Asprellae. By using the refined technology of the invention, the retention rates of the total saponin of Radix Ilicis Asprellae and f ilexoside X XIX are improved greatly, and the obtained extract has higher purity; the obtained total saponin of Radix Ilicis Asprellae has the functions of inflammation resistance, analgesis, koortswerend, antivirus and the like; by using the characteristic saponin ilexoside X XIX as a reference sample, the accuracy is higher and the result has high reliability; and the quality detection method of the total saponin of Radix Ilicis Asprellae extract can provide a reference for quality control of the total saponin of Radix Ilicis Asprellae extract.
Owner:CHINA RESOURCES SANJIU MEDICAL & PHARMA +1

Mesoporous-aluminosilicate-based shaping phase change material prepared from fly ash and preparation method thereof

The invention belongs to the recycling utilization field of phase change heat storage materials and solid waste, and in particular relates to a mesoporous-aluminosilicate-based shaping phase change material prepared from fly ash and a preparation method thereof. Mesoporous aluminum silicate is used as a carrier of the mesoporous-aluminosilicate-based shaping phase change material, an eutectic phase change material is used as a loading substance, the mesoporous-aluminosilicate-based shaping phase change material is prepared by the following method: 1) mixing the fly ash and additives, then calcining, and quenching the calcined product; 2) performing controlled acid etching; 3) drying solid-liquid separation powder to prepare mesoporous aluminosilicate powder; 4) placing the mesoporous aluminosilicate powder in vacuum conditions, and filling with an excess molten state phase change material to obtain a mixture; 5) performing solid-liquid separation of the mixture to prepare solid powder, cleaning with a solvent, and drying to obtain the mesoporous-aluminosilicate-based shaping phase change material. Channels of the cylindrical or wedge-shaped mesoporous-aluminosilicate-based shaping phase change material prepared by the method are tapered, loading of the phase change material is more continuous, compatibility is increased, and leakage rat is reduced.
Owner:华东理工常熟研究院有限公司

Comprehensive energy system parameter determination method based on distributed optimization and related device

The invention provides a comprehensive energy system parameter determination method based on distributed optimization and a related device, a comprehensive energy system represented by an electric power natural gas comprehensive energy system comprises at least one processor, and the processors correspond to different energy analysis areas respectively. In other words, different energy analysis areas are processed by using different processors, so that a regional management mode can be adopted during management, and when the processors perform area regulation and control, the conditions of equipment in the areas and the conditions of line equipment connected with the different areas are considered, cooperative optimization of the whole comprehensive energy system can still be guaranteed while independent control over the energy analysis area is achieved. Compared with a unified control mode of all areas, only boundary data needs to be shared among different areas, the data sharing content is small, data dispersion processing is achieved, the probability of data leakage of the whole comprehensive energy system can be reduced, and the equipment operation safety of the whole comprehensive energy system is improved.
Owner:STATE GRID ZHEJIANG ELECTRIC POWER +1

Reverse pushing type reactor pressure vessel and reactor internals thereof

The invention belongs to the technical field of nuclear power safety equipment design, and specifically relates to a reverse pushing type reactor pressure vessel and reactor internals thereof. According to the present invention, a main separation plate and a secondary separation plate are welded on the bottom dome of a reactor pressure vessel, the main separation plate is positioned above the secondary separation plate, a high performance hydraulic jack is positioned on the secondary separation plate, a gradual changing type control rod is positioned on the main separation plate, the lower end of the gradual changing type control rod is inserted into the main separation plate, the upper end of the gradual changing type control rod is inserted into the top dome of the reactor pressure, an inside-reactor structure guide steel column is welded on the bottom dome of the reactor pressure vessel, the upper end of the inside-reactor structure guide steel column is inserted into the top dome of the reactor pressure, a fuel assembly tray is positioned above the main separation plate and is provided with a plurality of holes, the gradual changing type control rod and the inside-reactor structure guide steel column penetrate through the holes, the lower end of the fuel assembly tray and the upper end of the high performance hydraulic jack are connected, and a neutron absorption body is positioned in a cavity formed by the reactor pressure vessel main body, the bottom dome of the reactor pressure vessel, the main separation plate and the secondary separation plate.
Owner:SHANGHAI NUCLEAR ENG RES & DESIGN INST CO LTD

Ultrasonic welding type anti-leakage beverage cup lid

The invention relates to an ultrasonic welding type anti-leakage beverage cup lid which comprises a lid body and a seal cover. A groove is formed in a panel of the lid body; an annular flange is formed among the side wall surface of the groove, the panel and a circumferential outline surface of the lid body; a drinking port is located in one side of the annular flange; a leak receiving cavity is located on the opposite side of the drinking port; an avoiding cavity is further arranged between the leak receiving cavity and the drinking port; the seal cover comprises a first cover plate ultrasonically welded to the edge of an opening part of the leak receiving cavity and used for closing the leak receiving cavity, a second cover plate in turnover connection with the first cover plate and capable of closing the avoiding cavity, a third cover plate extending to the drinking port from the end part of the second cover plate, and a cover plug; and a through hole communicating with an exhaust hole is formed in the first cover plate. According to the ultrasonic welding type anti-leakage beverage cup lid provided by the invention, the leak receiving cavity is closed by adopting ultrasonic welding, so that the leakage probability in the delivery process can be greatly reduced; and meanwhile, the seal cover can repetitively open or close the drinking port, and a placement space is providedfor an upper lip, so that the comfort in drinking is further improved.
Owner:STARBUCKS

Root key generation and isolation method for multiple systems and root key module

The invention discloses a root key generation and isolation method for multiple systems and a root key module. The method comprises the following steps: firstly, combining feature information corresponding to a system needing to generate a key with a chip root secret key to form secret key source data corresponding to the system, and then carrying out key generation operation on the key source data to obtain system root key data corresponding to the system. In this way, the obtained root keys corresponding to all the systems can be kept independent of one another due to the fact that the generated feature information is different. By applying the virtualization design of the invention, different system root keys can be generated for different systems, and security key isolation between different systems can be effectively realized. Because each system does not need to separately call the chip root key for encryption, the usage scenario of the chip root key is almost limited to the situation that the chip root key needs to be used when only the system root key is generated. Therefore, the probability of leakage of the root key information of the chip can be reduced.
Owner:NANJING SEMIDRIVE TECH CO LTD

Gas-liquid vibration damping device

The invention discloses a gas-liquid vibration damping device. The gas-liquid vibration damping device comprises an inner oil storage cylinder, an outer oil storage cylinder, a piston rod and an oil hydraulic piston. An inner cavity of the inner oil storage cylinder is divided into an upper pressure cavity and a lower pressure cavity through the oil hydraulic piston. A partition plate of a lower cylinder opening of the inner oil storage cylinder is provided with a compensating valve and a circulating valve, wherein the compensating valve guides hydraulic oil between the inner oil storage cylinder and the outer oil storage cylinder into the lower pressure cavity, and the circulating valve guides hydraulic oil in the lower pressure cavity into the position between the inner oil storage cylinder and the outer oil storage cylinder. The oil hydraulic piston is connected to the position, in the inner oil storage cylinder, of the lower end of the piston rod. The oil hydraulic piston is provided with a compression valve and an extension valve, wherein the compression valve guides the hydraulic oil in the lower pressure cavity into the upper pressure cavity, and the extension valve guides hydraulic oil in the upper pressure cavity into the lower pressure cavity. The lower pressure cavity is internally provided with an upper air pressure piston and a lower air pressure piston and is divided into an upper oil cavity, a middle floating air pressure chamber and a lower oil cavity. According to the gas-liquid vibration damping device, the floating air pressure chamber is arranged additionally on the basis of a traditional double-barrel-type hydraulic damper, and impact exerted on the oil hydraulic piston can be effectively relieved.
Owner:GUILIN UNIV OF ELECTRONIC TECH

Splitting box, multi-connected air conditioning system and operation method of multi-connected air conditioning system

The invention discloses a splitting box, a multi-connected air conditioning system and an operation method of the multi-connected air conditioning system, relates to the technical field of air conditioners, and aims to improve comfort during refrigeration and heating. The multi-connected air conditioning system comprises an outdoor unit, a floor heating tube set and at least one indoor unit, the multi-connected air conditioning system further comprises a liquid pipe splitter which is connected between the liquid pipe end of the outdoor unit and the floor heating pipe set, and between the liquid pipe end of the outdoor unit and at least one indoor unit, an air pipe splitter which is connected between the air pipe end of the outdoor unit and the floor heating pipe set, and between the air pipe end of the outdoor unit and at least one indoor unit, and control valves each of which is arranged on a pipeline between the air pipe splitter and at least one indoor unit, and is used for limitinga refrigerant to flow from the air pipe splitter to at least one indoor unit during heating of the floor heating pipe set. According to the multi-connected air conditioning system provided, independent refrigeration of the indoor units and independent heating of the floor heating pipe set are realized, and the comfort during refrigeration and heating is improved.
Owner:HISENSE (SHANDONG) AIR CONDITIONING CO LTD
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