164results about How to "Guaranteed concealment" patented technology

The invention relates to the technology of communication, and discloses a differential relay method and device for a global navigation satellite system. According to the invention, the method comprises the steps: enabling a transmission region of a server to be divided into a plurality of grid units, setting at least one differential relay in each grid unit; calculating a difference correction number of each differential relay through the server, and transmitting the position information of each relay and the difference correction numbers to a user terminal, so that the user terminal employs the position information and the difference correction number of the differential relay nearest to the user terminal for differential positioning, thereby facilitating the use of differential services. Moreover, the server can meet the demands of a large number of users only if the server calculates a fixed number of difference correction numbers, thereby improving the coverage and usability of the differential services. In addition, the user terminal does not need to upload the position information of the user terminal to the server, can carry out differential positioning through obtaining the difference correction number of the nearest differential relay according to the position information of each differential relay, and guarantees the crypticity of a user.

The semi-autonomous submarine has water sealed hull comprising transparent pressure-proof glass cover and main hull; video camera capable of rotating in several directions and LCD screen inside the glass cover; underwater video camera, operating handle and keyboard for diver to use; imaging sonar in the bottom for detecting sea bed topography; control computer, gyroscope, cell and driving motor inside the main hull; one pair of stabilizing prow wings and one pair of stern hydroplanes for stabilizing navigation direction and regulating the depth of the submarine separately; one pair of auxiliary propellers capable of rotating in vertical planes to provide the submarine with vertical lift and auxiliary running function and horizontal steering performance; two main propellers and one pair of stern fins for stable navigation; and optical cable for the data transmission between the submarine and the mother ship.

The invention provides a method for realizing auto alarm of a mobile terminal. An acquiescent alarm information scene mould and an alarm number group are preset in the mobile terminal. After a safe key on the mobile terminal used for starting the auto alarm is triggered, position information of the mobile terminal is positioned; the position information is filled in the acquiescent alarm information scene mould; alarm information is sent to the preset alarm number group. When the safe key is triggered, the method further can fill identifiers of international mobile users in the acquiescent alarm information scene mould and can begin to recording and/ or videography or can lock the mobile terminal. The invention also provides a device for realizing the auto alarm of the mobile terminal. Using the invention can realize automatic group sending alarm information to cause the alarm to be more effective and reliable; in addition, the invention does not need user communication, thus guaranteeing concealment of the alarm.

The invention discloses a mixing battery group consisting of a lithium power battery group and a super capacitor group. The mixing battery group comprises a rectifying circuit, a charging buffer circuit, a lithium power battery group consisting of a plurality of lithium power batteries, a super capacitor group consisting of a plurality of super capacitors, a main circuit of bilateral switch, an output switch and a signal collection and control circuit; the outer current or DC electrical source is connected with the input terminal of the main circuit by the rectifying circuit and the charging buffer circuit, and the output terminal of the main circuit is connected with the electric equipment by the output switch; the signal collection and control circuit comprises a controller, a bus bar voltage transducer, a lithium battery group voltage transducer, a lithium battery electric current transducer and an output current transducer. The invention can provide output of electric energy with high power and high energy stably, guarantee to be effectively connected with 220V effective value of electric equipment, and bear a certain degree of fluctuation of charging voltage and current, and guarantee the stability and convenience for electric energy supply and invisibility of power supply. The mixing battery group is characterized by small volume and convenient carrying.

The invention discloses a method of master and backup machines applies TCP to switch TCP connection as communicating with remote-end machine, thus effectively avoiding the interruption of the TCP connection with remote-end machine as the master and backup machines switch between them, not influencing the continuity of the communication with the remote-end machine and making the remote-end machine not sense the switching course. It makes a certain small-rage reformation on traditional TCP protocol stack to adapt to the requirement of realizing the invention. It can be widely applied to the master-backup machine network communication by TCP.

The invention belongs to the technical field of underwater sound communication and particularly relates to a whale-sound-imitating covert underwater sound communication method based on self-adaptive interference cancellation. The method comprises steps as follows: a proper whale sound signal is selected, the time frequency characteristic of the whale sound signal is analyzed, and a proper time frequency interval is selected for spread spectrum signal concealment; digital information source information is modulated into a direct sequence spread spectrum signal, and the frequency range of the spread spectrum signal is required to be within the frequency band range of the whale sound signal; the spread frequency signal produced in step (2) and the whale sound signal selected in step (1) are summed up to form a bionic communication signal and the like. The whale-sound-imitating covert underwater sound communication method based on self-adaptive interference cancellation is simple, easy to implement, high in reliability and capable of guaranteeing the covert property and safety of communication information and well meeting the requirement of a covert underwater sound communication system.

The invention discloses a run length coding-based two-dimensional code information hiding method. The method comprises the following steps of: simultaneously processing carrier information carrier andsecret information set; Before a two-dimensional code is generated, embedding secret information secret to be encrypted into carrier information card through an encryption algorithm, then generatingencrypted information into a two-dimensional code image QR, and genertaing a key Key; enabling The sender to send the two-dimensional code image QR to a receiver; And after receiving the QR of the two-dimensional code image, enabling the receiver to decrypt the QR through a decryption algorithm to obtain carrier information carrier and secret information set. And compressing the text information by adopting a run-length coding algorithm to obtain bits in which information can be embedded, thereby achieving the encryption purpose of the invention. The two-dimensional code information hiding method based on run-length coding has the advantages of being large in transmitted information amount, good in information concealment, high in robustness and compression resistance, high in safety and the like.

A mobile terminal capable of being tracked and located is disclosed, comprising a built-in card and a security system module which are connected with each other. The security system module generates a short message used for tracking and locating when receiving an incoming call request or a short message sent by the built-in card, wherein the short message at least carries an identification of a cellular tower interacting with the built-in card and information of current signal intensity, and the short message is sent into the built-in card; the built-in card sends the received incoming call request or the short message to the security system module and periodically sends the short message used for tracking and locating generated by the security system module to the set security number. A corresponding method is also provided. The security system is good at cover-up to bring the advantages of security and saving electricity.

The invention relates to a touch panel. The touch panel comprises a touch sensing layer and a cover plate, wherein the touch sensing layer comprises a silver nanowire electrode and a routing region corresponding to the silver nanowire electrode; a routing material of the routing region is a silver nanowire; the cover plate is positioned on the touch sensing layer and comprises a visual region and a coverage region; the coverage region is formed by coating the periphery of at least one edge of the visual region with a color coating; and the thickness of the color coating is less than 10 microns. The color coating of the touch panel can well cover the routing region, so that the touch panel has the characteristic of a colorful appearance.

The invention discloses an estimation method of an installation error of a DVL direction in an SINS and DVL combination. The method comprises the steps that an SINS speed error, an attitude error, a position error, an accelerometer null bias, a gyroscope null bias, a DVL scale coefficient error and the installation error of the direction of an IMU in a DVL and an SINS are selected to serve as state vectors, and a system state equation is established; a difference value of the SINS load system speed and the DVL installation coordinate system speed is selected to serve as a measurement vector, and a system measurement equation is established; a Kalman filter serves as an SINS and DVL information fusion filter; turning motion is selected to obtain the best observable degree of the SINS and DVL direction installation error, thus, the best estimation effect is achieved. According to the estimation method of the installation error of the DVL direction in the SINS and DVL combination, an external GPS is not needed for reference to assist in navigation information, the DVL speed does not need to be converted to a navigation coordinate, and the feasible plan of improving the direction installation error estimation performance can be selected according to the observability analysis results.

The invention belongs to the technical field of network security communications, and particularly relates to a safe and rapid anonymous network communication method and system. According to the method, random change of a communication port and branching and converging functions of a communication link are realized according to a thought based on UDP (User Datagram Protocol) penetration, so that a large confusion flow can be generated in a small system; a function similar to a P2P acceleration function is realized; and a one-way transmission can be performed. In the system, uniform centralized authorization management is adopted for all system network resources, so that access of illegal third-party resources is prevented. A type A communication is adopted between a control center and Internet access equipment, so that the security of the control center is ensured effectively. A mobile monitoring center is deployed movably, and actively detects a state of a relay server, so that large-area node exposure caused by malicious node exposure is effectively avoided.

The invention discloses a safety communication method for voice information. The hiddenness of communication is guaranteed through a discrete cosine transform domain embedding algorithm based on coefficient quantization. A secret voice is encrypted through a selective chaotic encryption algorithm, and only few key bits in audio frequency are encrypted in the encryption process, so that the encryption efficiency is greatly improved, and the confidentiality of the content in the secret voice is guaranteed. The completeness of the content in the secret voice is judged by calculating and comparing a robust message authentication code of the secret voice. While the hiddenness of voice communication is guaranteed, the confidentiality and the completeness of the voice communication content are ensured, and the safe voice communication is realized.

The invention discloses a method for hiding contact person information on an intelligent device. The method comprises the steps that a private contact person list is built and is managed by the adoption of a safety verification mode; when the contact person list is used, a private contact person keyword is input according to a preset condition so as to search for a private contact person, when a system judges that the input private contact person keyword is matched with the preset condition, the corresponding private contact person information is displayed in a search result list, communication logs of the private contact person are stored into the private contact person list through communication connection, and therefore the privacy and safety of the private contact person are ensured. A user can conveniently check the private contact person in the contact person list and a dialing interface and does not need to worry that the private contact person information is utilized by criminals.

The invention provides a covert hopping communication method based on DNA encryption. The method comprises the following steps: a message server and a client are deployed; the client encrypts text contents into a letter A-P text sequence; the client carries out the DNA encryption on the text sequence with letter A-P ciphertext; the server configures four IP addresses which are respectively corresponding to four basic groups of DNA, and the client sequentially accesses the corresponding IPs on the server according to the encrypted DNA sequence for DNA encrypted sequence sending; when accessing the IPs on the server, the client calculates service port numbers based on time stamps, and makes access requests according to the target IPs and ports; the server obtains a letter A-P plaintext encrypted sequence through conversion according to rules; and the server recovers the original contents from the encrypted sequence. The method provided by the invention has the advantage that DOS attacks and eavesdropping attacks during communication can be effectively resisted.

The invention provides a self-adaptive hybrid light supplement control method and system for a face snapshot camera, a medium and a terminal. The method comprises the steps that the day and night state of a monitoring area is detected; when the monitoring area meets the preset night state, a first light supplementing mode is started, image information of the target scene is obtained, and the firstlight supplementing mode comprises infrared light supplementing; the image information in the first light supplementing mode is detected, and when a face image appears in a detection result, the infrared light intensity is adjusted according to the brightness of the face image; if the snapshot condition is met, the first light supplementing mode is closed, a second light supplementing mode is started, and the second light supplementing mode comprises white light supplementing; the white light intensity is adjusted according to the brightness of the face image of the target object to completeface snapshot. According to the invention, a mode of combining infrared light supplement and white light supplement is adopted, the problem that a single light supplement lamp cannot give consideration to camera concealment and snapshot image quality is solved, and the snapshot quality of face images at night is improved on the premise of ensuring the camera concealment.

The present invention discloses a gravitational acceleration correcting method and system. The method comprises the steps that when gravitational acceleration is demarcated for the first time, a first request is sent to a server, the server sends an encrypted control code back, and an electronic weighing device decrypts and stores the control code; after obtaining a first external command, the electronic weighing device transmits the first external command to the server, the server positions and sends the gravitational acceleration and an encrypted control code back, and the electronic weighing device decrypts the control code and compares the decrypted control code with the stored control code to see if they are the same; if yes, setting the gravitational acceleration as that of the electronic weighing device, and if not, finishing. With adoption of the method, the gravitational acceleration can be automatically set according to the position where the electronic weighing device is, thereby ensuring weighing accuracy, preventing other servers from tampering the gravitational acceleration of the electronic weighing device, and effectively ensuring correcting security and data transmission concealment.

The invention relates to an air-ground amphibious robot, belongs to a bionic shape air-ground amphibious robot device. A ground walking device is fixedly connected with a flight device. The air-ground amphibious robot has the benefits that the air-ground amphibious robot has high obstacle crossing capacity and through capacity, meanwhile, has flight capacity, and mainly comprises the advantages that firstly, bionic platform design is adopted, the stealthiness of the robot is convenient to guarantee when the robot carries out a task, the overall mechanical design size is small, and the appearance of the robot achieves bionic camouflage; secondly, an incomplete wheel structure with a bionic structure is adopted, and the through capacity of the structure is higher than that of wheel type and crawler type structures under the condition of light weight and the same size; thirdly, an automatic inclinator and coaxal sculls are simplified, the mechanical structure is simple and compact, the size is small, the weight is light, and the control is simple.

The invention discloses a double-blade and double-faced symmetric machining device of large propellers, and relates to propeller machining devices. The device is provided with a fixed seat; a pair of symmetric propeller machining devices are arranged on the fixed seat; each propeller machining device comprises a supporting frame, an X-direction sliding seat, an X-direction driving screw rod, and a machining power device consisting of an X-direction driving motor, a Y-direction sliding seat, a Y-direction driving screw rod and a Y-direction driving motor; a small-free-degree parallel mechanism is arranged on the Y-direction sliding seat; a machining tool is arranged at the executing end of the small-free-degree parallel mechanism; and dividing mechanisms matched with the propeller machining devices and used for clamping propellers are arranged on the two supporting frames. The device can symmetrically machine the pressure surface and a suction surface of a paddle of the propeller, double-faced symmetric machining can effectively eliminate cantilever beam effect generated during the machining process, simultaneously reduce vibration, and improve the rigidity performance of the machining device, the machining efficiency and the machining accuracy of the propeller are high, and the invisibility and the safety of military submarines are guaranteed.

The invention provides a launching vehicle of a multi-task unmanned aerial vehicle for a submarine, comprising a launching vehicle main body, a plurality of attitude adjusting airbags, an upfloating airbag and a suspension airbag. A plurality of unmanned aerial vehicles (UAVs) are uniformly arranged in the launch vehicle main body, a plurality of attitude adjustment airbags are uniformly arrangedalong the circumferential direction of the outer wall of the launch vehicle main body end, the upfloating airbag is arranged along the circumferential direction of the outer wall of the front end of the launch vehicle main body, and the suspension airbag is arranged along the circumferential direction of the outer wall of the front end of the launch vehicle main body; the upfloating air bag and the suspension air bag are free of air initially and are inflated under certain conditions; the attitude adjustment airbags and corresponding UAVs are located in the same position inside and outside thelaunch vehicle body, and the inflation time of each attitude adjustment airbag is not the same and the airbags are deflated after a period of time after inflation.

The invention belongs to the technical field of underwater acoustic communication, and particularly relates to a simulated dolphin whistle continuous phase multivariate frequency modulation underwateracoustic communication method. The method of the invention includes the following steps: performing continuous phase multivariate frequency modulation on information by a sending end; adding the modulated signal with a time-frequency spectrum profile of an extracted dolphin whistle signal in a certain proportion to generate a synthesized whistle, and further obtaining a simulated whistle data signal; adding an original whistle signal before the simulated whistle data signal to serve as a synchronization signal, and forming a frame of transmission signal; after a receiving end performs synchronization, extracting each symbol waveform; and calculating correlation functions between each symbol waveform and all possible signal waveforms of the symbol, and judging a maximum correlation peak toimplement demodulation. According to the simulated dolphin whistle continuous phase multivariate frequency modulation underwater acoustic communication method, provided by the invention, each symbolcan modulate a plurality of pieces of bit information, the communication rate is high, the similarity between the synthesized whistle signal and a real whistle signal is high, and the underwater acoustic communication method has strong concealment and can meet the requirements of underwater covert acoustic communication.

The invention provides an emergency calling method for a mobile terminal. The method is used for the mobile terminal with a communication function, and the mobile terminal comprises a bolt with an emergency trigger function and a jack with an emergency detection function. The emergency calling method comprises the following steps of: when the bolt is inserted into the jack, starting an emergency calling system of the mobile terminal; and when the bolt is pulled out of the jack, performing automatic calling by the emergency calling system of the mobile terminal, wherein the automatic calling comprises the following steps of: automatically starting the communication function of the mobile terminal, automatically dialing a calling telephone, turning on a microphone unit of the mobile terminal when the calling telephone is answered, and turning off a receiver unit of the mobile terminal. By adopting the method, a user can ask for help in a timely and concealed mode through the mobile terminal.

The invention relates to a photoelectric double-channel automatic watching following semi- diving device, belonging to ship engineering technical field, comprising a casing, vertical and horizontal tail fins, reversible screw propeller, top frame, connection pipe, vent-pipe, power system, vertical and horizontal tail fin executer, photoelectric periscopic window, signal processing encryption and decryption machine, transmitting and receiving energy exchange base array, hydraulic sensor, control system, air compressing bottle, rapid blow valve, ballast tank, water injection system, and water injection valve. The semi-diving device can be completely hidden underwater and can only expose the periscopic window for detecting and encrypts the detected image signal and transmits it in form of water sound wireless signal to the underwater mother boat. The encrypted control instructions emitted by the underwater mother boat are transmitted to the semi-diving device in the data transmission form of water sound digital communication and command the semi-diving device to work after decrypted. The encrypted water sound wireless signal is unable to be modified, broken down, intercepted or utilized by the enemy and can be widely applied to military and civil occasions and the others.

The invention relates to the field of data processing, and provides a watermark adding method and device, computer equipment and a storage medium. The method comprises the following steps of acquiring target data to be added into a picture, performing byte conversion on the target data to obtain an original byte array; processing the original byte array based on an encode method of base64 to generate a specified byte array; according to a preset updating rule, sequentially using every three bytes in the specified byte array to perform one-to-one correspondence updating processing on the color values of the three color channels in the corresponding pixel points of the corresponding row in the picture; and filling the specified pixel points in the picture with the character length to obtain a target picture so as to complete watermark adding processing of the picture. The target data is added into the picture in an implicit manner, so that the sharing safety and concealment of the target data are ensured. The invention can also be applied to the field of block chains, and the target pictures and other data can be stored on the block chains.