162results about How to "Will not be exposed" patented technology

The invention discloses a multi-ground-clearance self-steering intelligent sprayer and a control method. The sprayer comprises a vehicle platform, two self-steering traveling mechanisms, a controllable lifting spraying device, a gasoline power generation and supply device and a control device, and each self-steering traveling mechanism is connected with the vehicle platform by adopting a rotation structure; the controllable lifting spraying device is fixed at the tail of the vehicle platform and comprises a sprayer lifting mechanism, a spraying rod device and a drug mixing device, the spraying rod device is arranged on the sprayer lifting mechanism and connected with the drug mixing device, and a spraying rod can move up and down along with traction of the sprayer lifting mechanism; the drug mixing device is fixed in the middle of the vehicle platform and provides drug to spraying equipment for spraying, the gasoline power generation and supply device is fixed on the front portion of the vehicle platform and serves as a stable voltage power source of the equipment, and the control device is connected with driving equipment, a control motor and multiple sensors. Four hub motors are controlled by the control device to realize self-steering of wheels at differential speeds, and the sprayer is high in control accuracy and small in turning radius.

The invention discloses an authentication method based on homomorphic encryption. The authentication method comprises the following steps: generating a secret key and a public key of a homomorphic encryption algorithm for a user; storing the secret key in mobile storage equipment; collecting original biological features of the user, encrypting the original biological features by using the public key to generate the original biological feature ciphertext; and sending the original biological feature ciphertext to store in an authentication server, thereby accomplishing the registration; collecting the current biological features of the user, and encrypting the current biological features by using the homomorphic encryption algorithm to generate the current biological feature ciphertext; sending the current biological feature ciphertext to the authentication server, requesting the authentication under the ciphertext state, and acquiring the secret key in the mobile storage equipment, decrypting the authentication information by using the secret key and sending the decryption result to the authentication server. Through the adoption of the method disclosed by the invention, the biological features are authenticated under the ciphertext state, the strong safety guarantee is provided, and the biological feature information leakage of the user is avoided.

Apparatus for delivering therapeutic agents to the central nervous system of a subject is described. The apparatus comprises at least one intracranial catheter and a percutaneous access device (50; 140; 150; 160). The percutaneous access device comprises a body (10; 52; 152) having at least one extracorporeal surface (22; 68) and at least one subcutaneous surface, the body (10; 52) defining at least one port (12; 116) for connection to an implanted intracranial catheter. The port (12; 116) is accessible from the extracorporeal surface (22; 68) of the device, but is provided with a seal (14; 112; 142; 146) such as a rubber bung between the lumen of the port and the extracorporeal surface (22; 68). The percutaneous access device may have more than two ports (12; 116) and/or a flange (26; 54). A method of implanting the percutaneous access device(50; 140; 150; 160) is also described.

The invention discloses a method for generating a SM9 digital signature through multi-party association under a symmetrical environment. The method comprises a plurality of participants, and comprisesthe following steps: a key generation center KGC generates master public and private keys; the KGC issues some private keys for all the participants; all the participants associates to sign, then, the generated signature is verified through a digital signature verification algorithm of the SM9, and if the signature passes through verification, the SM9 signature about a message M is published. With the method provided by the invention, generation of the SM9 digital signature through multi-party association is realized, each participant in a signing process is guaranteed not to expose some private keys, meanwhile, signing of the digital signature should be participated by all the participants, thus, security and fairness of multi-party signing are realized.

The invention discloses an LED (light-emitting diode) dot matrix display screen and a combined dot matrix display screen. The dot matrix display screen comprises a heat-dissipating substrate, a PCB (printed circuit board), an uniformly-arrayed LED light-emitting unit, an imaging controller, a layout circuit conducting layer, a pervious-to-light packaging colloid for packaging LED chips, and a plastic plate forming the pervious-to-light packaging colloid for packaging the LED chips, wherein the LED light-emitting unit comprises more than one LED chips, guide lines and the pervious-to-light packaging colloid; the guide lines electrically connect the LED chips with the layout circuit conducting layer, and the pervious-to-light packaging colloid is used for packaging the LED chips; a hermetically-sealed outer cavity side wall which is hermetically connected with the plastic plate and the heat-dissipating substrate is arranged between the plastic plate and the heat-dissipating substrate; the heat-dissipating substrate, the hermetically sealed outer cavity side wall and the plastic plate defines a hermetically-sealed cavity, and the PCB is accommodated in the hermetically-sealed cavity; and the heat-dissipating substrate, the plastic plate and the pervious-to-light packaging colloid are directly contacted with the outside air. The dot matrix display screen disclosed by the invention has the advantages that of being simple in structure and low in cost and having good waterproof and heat-dissipating effects since the PCB is accommodated in the hermetically-sealed cavity formed by the heat-dissipating substrate, the hermetically sealed outer cavity side wall and the plastic plate.

The invention discloses a decentralized access control method for safe sharing of data in a smart power grid. The method comprises the following main implementation steps: 1, constructing an access control system; 2, initializing an access control system, and generating a global public parameter GP of the system; 3, initializing an authorization mechanism; 4, generating a user key; 5, generating acloud server private key, a signature public key and a signature private key; 6, generating a final ciphertext; 7, verifying the identity of the user and decrypting the message; and 8, deleting the user to be revoked from the private key list of the cloud server. According to the method, multiple mechanisms are adopted to jointly undertake tasks of the system, the efficiency of the system is improved, a large amount of encryption and decryption calculation is carried out by the cloud server, the calculation overhead of a data user is saved, and zero knowledge is added to prove that the identity information of the user is protected in the interaction process of the user and multiple authorization mechanisms.

The invention discloses a secret key management method for a distributed wireless sensor network based on a one-way function, which supports network extension and dynamic node movement. When a new node is added into a network, the newly added node can establish a safety communication secret key pair with a neighboring node in the network; when the node shifts out from a neighboring node communication range, the original neighboring node cancels the communication secret key pair with the node; and when the secret key is used for overlong time, the secret key pair is updated between the nodes. The secret key management method has low requirement for node storage resources, and the communication secret key pair can be established between the neighboring nodes at high probability as long as aone-way function, a public secret key pair and a public key subset are pre-stored by the node; and thus, the network safety performance is improved, other nodes and the link safety cannot be influenced when the node in the network is captured, and the purposes of the invention are achieved.

The invention relates to an evaporation coating device and an air extracting process thereof. The evaporation coating device adopts a set of an electric arc titanium pump, a traction molecular pump and a prepump with parallel air extracting to replace the seat of a conventional diffusion pump, a roots pump and a slide valve pump (or rotary vane pump) with series air extracting, wherein an active gas with high vacuum can be fast extracted by the electric arc titanium pump; an inert gas with high vacuum and a middle vacuum gas can be fast extracted by the traction molecular pump set. Because the electric arc titanium pump and the traction molecular pump are both low energy consumption pumps, the electric arc titanium pump mainly runs in a refined extracting stage and a coating stage and the running time is less than 1/3 of the entire air extracting time, air extracting energy consumption can be greatly reduced by the evaporation coating device. In addition, the set of the conventional diffusion pump, the roots pump and the slide valve pump does not have oil vapor pollution so that the oil vapor pollution of a conventional evaporation coating device is also eliminated by the evaporation coating device.

A foundry binder comprising (a) a polyol component selected from the group consisting of phenolic resins, polyether polyols, polyester polyols, aminopolyols, and mixtures thereof, and (b) a polyisocyanate component, wherein component (a) and/or (b) further comprise, as a solvent, one or more cycloalkanes.

The invention discloses a manufacture method of an LED integrated structure, comprises the following process steps: molding a heat dissipation substrate; molding a layout circuit conducting layer; molding a position lens or the plastic part of the lens; carrying out die bonding; electrically connecting an LED chip with the layout circuit conducting layer; and packaging the LED chip and wires. Themethod has the advantages of less process, simple technology, low manufacturing cost, small heat resistance and good heat dissipation of the intermediate link of manufacturing the LED chip and accurate position relation of the lens and the chip, and the LED integrated structure has the advantages of high luminous flux, simple structure, simple assembling, good heat dissipation effect and good optical effect.

The invention discloses a non-metal yarn inlaid ratproof optical cable and a manufacturing method thereof. The optical cable comprises an optical cable outer sheath and an optical cable inner sheath.A stainless steel belt armor layer is arranged in the inner sheath. Glass fiber yarn is inlaid in the outer sheath. The outer sheath and the inner sheath are separated by a water blocking layer. A cable core formed by SZ stranding a central reinforcing member and a PBT loose sleeve is arranged in the stainless steel belt armor layer. The PBT loose sleeve contains at least two or more colored optical fibers. The colored optical fibers are surrounded by a sleeve filler. The method comprises the steps of optical fiber coloring, cable core manufacturing through PBT optical fiber oil-filled loose sleeve stranding, stainless steel belt armor polyethylene inner sheath manufacturing, water blocking belt longitudinal wrapping, water-blocking glass fiber yarn manufacturing and glass fiber yarn inlaying in the polyethylene outer sheath, namely non-metal yarn inlaid ratproof optical cable molding. The optical cable has the advantages of good bending performance and light weight, is soft, and is prevented from the damage of rats and environmental erosion. The structure of the optical cable is stable during the service life thereof.

The invention discloses a self-steering mechanism about the multiple land gaps in the field, which comprises the mobile platform, the self-steering walking mechanism and the control device.The self-steering walking mechanism is composed of two bases with the slewing mechanism and four tires with the in-wheel motor.The slewing mechanism is rotated by the bearing arranged in the mobile platform, the shore at the bottom of the bearing and the shock absorber.Or the slewing mechanism is rotated by the bearing arranged in the mobile platform, the base platform at the bottom of the bearing and the vehicle and bridge.The self-steering mechanism about the multiple land gap in the field utilizes the control device to control the four in-wheel motors to realize the self-steering of the wheel differential with the high control accuracy and the short turning radius.

Provided is an optical film laminate wherein pressure-sensitive adhesive layers are not exposed to the outside. In a method for manufacturing said optical film laminate, the widths of a second film (32) and third film (33) which are laminated onto a first film (31) are both made smaller than the width of the first film (31), and the second film (32) and third film (33) are sequentially laminated onto the first film (31) such that neither protrudes past the first film (31) in the width direction. Thus, pressure-sensitive adhesive layers (32A and 33A) in the optical film laminate (30) are not exposed to the outside.

The invention discloses a method for jointly generating SM2 digital signature by multiple parties. The method comprises following steps that all parties P1, P2, ... , P<Tau> joining digital signaturerandomly select partial private keys x1, x2, ... , x<x>(belonging to Zn), and two partial random numbers k1, k2, ... , k<x>(belonging to Zn) and Rho1, Rho2, ... , Rho<x>(belonging to Zn); then all parties calculate through an interactive ideal function F<MULT> to obtain a public key P<pub>=(Q-G)=(Sigma<lota=1><Tau>x<lota>G-G) of SM2, and two intermediate variables R=Sigma<lota=1><Tau>k<lota>G=(r<x>,r<y>) and alpha =xRhomode n; for a message m, all parties separately calculate a hash value e=h(m) and a first signature r=r<x>+e mod n, and calculates through the interactive ideal function F<MULT>to obtain a third intermediate variable beta=Rho(k+r)mod n; and finally, all parties separately calculate a second signature s=min{alpha<-1>beta-r, n-alpha<-1>beta+r}, and outputs complete SM2 digital signature (r,s) after signature verification succeeds. Through adoption of the method, an SM2 digital signature is generated by multiple parties jointly, it is ensured that all parties do not disclose partial private keys in signing, and digital signature involves all parties, so that multi-party signature is safe and fair.

An LED lamp comprises a light-permeable lamp cover, a radiating base, LED light emitting units, a layout circuit conductive layer and a fixing mechanism, wherein the layout circuit conductive layer is connected with the LED light emitting units electrically, and the fixing mechanism is used for fixing the LED lamp at a set position. The LED light emitting units are fixed on the radiating base. The light-permeable lamp cover and the radiating base are mounted together to form a containing cavity for containing the LED light emitting units. The fixing mechanism is fixed on the radiating base directly, integrated to the radiating base, fixed on the light-permeable lamp cover directly, or integrated to the light-permeable lamp cover. Radiating through holes, which match with the LED light emitting units in arrangement, are further arranged among the LED light emitting units. Each LED light emitting unit is adjacent to the corresponding radiating through hole which penetrates through the light-permeable lamp cover and the radiating base. Both ends of each radiating through hole are communicated with air to form an air convection radiating passage. The LED lamp has the advantages that the LED lamp is simple in structure and effective in radiating, and the service life of the LED light emitting unit is long.

A pressure sensor module and method for pre-installation without a converter module. The pressure sensor module is hermetically sealed and can remain undamaged in an installation environment without a converter module. The pressure sensor module can be assembled later with a converter module in the installation environment. The pressure sensor module includes an isolator, a pressure sensor and a circuit that provides a bus for energization, control and a digital pressure output. The bus is connected to contacts in an insulating feedthrough. An integrally formed hermetic external support structure surrounds the pressure sensor and circuit. The hermetic external support structure has a threaded process fluid inlet around the isolator, and a threaded support sleeve supporting the feedthrough.

The invention discloses an automaticallyextensible medical apparatus placement desk having a waste receiving bucket. The automaticallyextensible medical apparatus placement desk comprises a rack, wherein a main placement housing is fixed to the top surface of a top plate of the rack, a waste receiving cell body is fixed on the right side of the top plate of the rack, a bottom plate of the waste receiving cell body is provided with a discharging through hole, the discharging through hole is communicated with a main waste through groove formed in the top plate of the rack, a lower-portion supporting plate on the right side of the rack is provided with a waste receiving bucket moving through groove, a transverse plate is fixed to the inner side wall of the lower-portion supporting plate on the right side of the rack, the middle of the transverse plate is provided with a middle transverse through groove, and a middle transverse screw is located in the middle transverse through groove. Theautomaticallyextensible medical apparatus placement desk is simple in structure, can automatically make a storage drawer extend out or retract back, is very convenient, and does not make articles foruse in the storage drawer exposed outside. In addition, the waste receiving cell body is directly located beside the storage drawer, is easily accessed by the hands and is very convenient, and used articles can be directly thrown into the waste receiving cell body and directly enter the waste receiving bucket.

The present invention discloses a fluid bed apparatus module (1), comprising an outer wall which encloses a processing chamber (9) and has a lower flange connection (4) and an upper flange connection (5). The lower flange connection is adapted to connection with a flange connection (14) of a supply of fluidizing gas, and the upper flange connection is adapted to connection with a flange connection (17) of a filter chamber (18) for gas discharge. At least one partition element (6) is arranged in the processing chamber, so that at least one elongated channel is formed in the processing chamber, thereby defining a plug-flow area, and at least one substantially continuous product inlet (10) and at least one substantially continuous product outlet (11) are arranged in the module. Furthermore, a method comprises changing a first module for a second module in a fluid bed apparatus.