30results about How to "Solve the problem of intrusion" patented technology

The invention discloses an acoustic device which comprises the components of a sound production unit which radiates sound waves at the front side of a vibrating diaphragm to the outside through a sound outlet; a first closed cavity is formed in the rear side of the vibrating diaphragm; a mounting hole is formed in the cavity wall of the first closed cavity, a flexible deformation part is arrangedon the mounting hole, a second closed cavity is formed in the outer side of the first closed cavity, and sound waves generated by the flexible deformation part during deformation are closed in the second closed cavity through the second closed cavity; a protective cover plate located on the outer side of the flexible deformation part is further arranged on the mounting hole, and an avoiding spaceused for avoiding vibration of the flexible deformation part is formed between the protective cover plate and the flexible deformation part; the protective cover plate is provided with a plurality ofair-permeable micropores, and the area of each air-permeable micropore is smaller than or equal to 0.2 mm < 2 >. According to the acoustic device, the resonant frequency can be effectively reduced, and the low-frequency-band sensitivity of the product is greatly improved on the whole.

The present invention provides a method for controlling and secure communication of an Internet of Things terminal. The method includes: numbering an IoT device, generating a corresponding key according to a corresponding number through a back-end encryption server according to a key generation rule, and sequentially writing the key into into the corresponding key card; when installing the IoT device, insert the key card into the card slot of the IoT device; the IoT device sends a request to establish a connection with the corresponding server according to the server address attribute recorded in the key card, After the two parties pass the authentication, the connection is established; when the IoT device communicates with the server, it selects different business servers for connection and access according to different business needs; when communicating, it uses the communication key stored in the key card to generate a The corresponding temporary working key encrypts the sent data, and the server also stores the master key, which can be decrypted after the corresponding temporary working key is generated. Solve security issues in IoT terminal control and secure communication.

The invention discloses a portable electronic device, which provides an electronic device capable of being connected to a storage medium through the portable electronic device. The portable electronicdevice comprises a first transmission interface, a second transmission interface and a selection interface. The first transmission interface is used to be electrically inserted into by the storage medium so as to build data which is transmitted on the portable electronic device; the second transmission interface is used for the electronic device to build data which is transmitted on the portableelectronic device; and the selection interface is operationally connected to the first and second transmission interfaces so as to switch the electronic device to write-only, read-only or read-write in the storage medium.

The present invention provides a control method for an accelerator pedal controlled hybrid electric vehicle powertrain. The vehicle powertrain controller includes a learning-capable fuzzy logic-based adaptive algorithm that estimates the driver's long-term driving preferences. Adaptive algorithms arbitrate competing requirements for good fuel economy, intrusion immunity, and vehicle handling. Maintain vehicle performance according to the driver's driving style.

The invention provides a shunting turnout crushing prevention automatic control device which comprises a photosensor, a controller, a magnetic control parking device and a photovoltaic power supply which are arranged on an annunciator. When the photosensor senses that a turnout is in a locked state, a signal is output to the controller, the controller controls a strong magnet of the magnetic control parking device to move toward the direction close to steel rails, a forcedly operating locomotive is urgently vented and the automatic parking is implemented, so that the accident of crushing the turnout by the locomotive; and when the photosensor senses that the turnout is in a switching-on state, a signal is output to the controller and the controller controls the strong magnet of the magnetic control parking device to move toward the direction far away from the steel rails, so that the normal passing of the locomotive is not influenced. A locomotive automatic stop system matched with the shunting turnout crushing prevention automatic control device for use comprises a magnetic induction sensor, a locomotive monitoring device (LKj), a brake and the like which are arranged on the locomotive. The shunting turnout crushing prevention automatic control device and the locomotive automatic stop system have the advantages of effectively preventing the accident of crushing the turnout by the locomotive, which is caused by the misjudgment and the blind action of a driver and providing the reliable guarantee for the safety production.

The invention discloses an acoustic device, comprising: a sounding unit, the sound waves on the front side of the vibrating diaphragm radiate to the outside through the sound outlet; the rear side of the vibrating diaphragm forms a first airtight cavity, and the first airtight cavity A mounting hole is opened on the wall of the cavity, a flexible deformation part is provided on the mounting hole, a second closed cavity is provided outside the first closed cavity, and the flexible deformed part is arranged in the second closed cavity. The sound wave generated during deformation is sealed in the second airtight cavity; a protective cover plate located outside the flexible deformation part is also provided on the installation hole, and the protective cover plate and the flexible deformation part An avoidance space for avoiding the vibration of the flexible deformation part is formed between them; a plurality of air-permeable micro-holes are opened on the protective cover, and the area of ​​each air-permeable micro-hole is less than or equal to 0.2mm 2 . The acoustic device in the present invention can effectively reduce the resonance frequency, and greatly improve the low-frequency sensitivity of the product as a whole.

An Internet of Things intrusion monitoring method and device provided in embodiments of the present invention relate to the field of Internet of Things security. The method includes acquiring data collected by sensing devices at the sensing layer nodes of the Internet of Things; based on the acquired data as training data and using the TrAdaBoost method, establishing an Internet of Things intrusion classification model, wherein the Internet of Things intrusion classification includes An intrusion behavior set and a normal behavior set; obtain the test data collected by the perception device again at the sensing layer node of the Internet of Things, and use the Internet of Things intrusion classification model to classify and judge; if the test data is divided into an intrusion behavior set, then Interception and alarm processing are carried out to solve the problem of monitoring intrusion behaviors at the perception layer of the Internet of Things.

The invention discloses an electronic device, a data access verification method and a storage medium, wherein the method comprises: after receiving a data access request, generating a user login interface or acquiring login verification information from a predetermined interface; After the login verification information entered in the user's login interface or the login verification information is successfully obtained from the predetermined interface, the login verification information is verified; after the login verification information is successfully verified, the mapping between the pre-determined primary information interface and the login verification information is performed. relationship, determine the primary information interface corresponding to the current login verification information, and display the determined primary information interface; after receiving the verification request sent by the user based on the primary information interface, perform biometric verification on the current user, and perform biometric verification on the current user. After successful verification, enter the database system. The technical scheme of the invention improves the problem that the database system is easily invaded, and improves the security of the database system.

This application discloses an intrusion detection method and device for Internet of Vehicles. The method includes: judging whether the message received from the message sending vehicle terminal contains a token number, a time stamp, and a message text package; if the received message contains a token number, a time stamp, and a message text package, sending the token No. and time stamp are sent to the authentication center for authentication, wherein, the token number is requested by the authentication center when the message sending vehicle terminal needs to send a message, and the time stamp indicates the time when the token number is issued; in response to receiving the token number from The certification center's authentication pass message, open the message body package. The application solves the problem that a non-vehicle network registered user maliciously sends a message with a virus to an on-vehicle unit in the vehicle network and realizes an intrusion on the vehicle network.

The invention discloses an antifouling and anticorrosion marine coating, which is composed of polymerized o-p-methylaniline, polychlorotrifluoroethylene, aldehyde and ketone resin, alkyl succinic imide, eucalyptus oil, azadirachtin, acrylic acid dicyclopentenyl oxide Ethyl esters, hydroxypropyl methylcellulose, coumarone-indene resins and water-based chlorinated rubbers according to 7-19: 4.6-5.8: 7.7-9.4: 8-11.2: 6-14: 9-16: 6 ‑8: 4‑6: 4‑6: 2.7‑6.1 mass ratio of the mixture made. The marine coating of the invention has excellent performance, and the method of obtaining the active ingredients is simple and fast, which can effectively protect the hull from seawater erosion and effectively prevent the adhesion of marine neoplastic organisms.

The invention discloses the river estuary bubble salinity restraining technology and belongs to the technical field of environment friendliness and water quality guarantees. Multiple hoses are laid in a river way and extend along the surface of a dam and the surface of a river bed, the extending direction of the hoses is perpendicular to the flowing direction of a river, the two ends of each hose are fixed, one end of each hose is plugged, the other end of each hose is connected with a main air inlet pipe, the main air inlet pipe is connected with an air blower, and multiple air holes are formed in the positions, located on the river bed, of the hoses. When the river estuary bubble salinity restraining technology is used, bubbles floating from the bottom of the river are generated through air blown through the air blower through the air holes, river section stratified flow mixture is accelerated, and salt water wedges are prevented from being transmitted to the upstream. The river estuary bubble salinity restraining technology is convenient to implement, operation is simple, salt tide upstream tracing is effectively restrained, and the technology is widely applied to river ways along the sea.

The invention relates to the technical field of ballast water long-distance discharge, in particular to a through type water ballast tank which comprises a water ballast tank body. The water ballast tank body is provided with a plurality of independent cabins. One end of each independent cabin is provided with a water inlet, and the other end of each independent cabin is provided with a water outlet. The top of each independent cabin is provided with a plurality of air ballast systems. A movable pressing plate is arranged in each independent cabin and is controlled by a mechanical lifting device to move. By means of the structural arrangement, a ship is through all the time through the water inlets and the water outlets in the sailing process, and the air ballast systems correspond to the movable pressing plates, so ballast water is discharged within the minimum safety range, seawater microorganisms or algae are prevented from being brought into an outer domain, the influences of external microorganisms are fundamentally eliminated, the problem of external microorganism invasion caused by ballast water long-distance discharge is greatly solved, the weight of the ballast water in the weight of the ship is reduced, ship loads are reduced, and the ship sailing efficiency is improved.