2847results about How to "Improve concealment" patented technology

An objective of the present invention is to obtain a mutual authentication method in which mutual authentication is carried out securely and conveniently. In order to achieve the above objective, in the mutual authentication process, a private key K0, being an initial value, is stored in a client and a server (Pc0, Ps0). The client generates a random number R, calculates secret data C and authentication data A, and transmits the data items to the server (Pc1). The server receives the authentication data A and the secret data C from the client, and generates a random number Q, calculates secret data S, and authentication data B and returns the data items, as well as updating the private key K0 with a private key K1 (Ps1). The client receives from the server the authentication data B and the secret data S, generates the random number R, calculates secret data C2, authentication data A2, and returns the data items to the server, and updates the private key K0 with the private key K1(Pc2). The client and the server check whether or not validity is established (Psm+1, Pcm+1). Further in the authentication method above, there is a method for generating a onetime ID, assuming that the onetime ID is identification information usable just one time in the authentication between a plurality of devices or application. In each of the devices or applications which carries out the authentication, a variable shared key which changes per predefined communication unit requiring the authentication is generated, a function value of one-way function is obtained in which the variable shared key is used as an argument, a onetime ID hard to tap and superior in security is generated based on the function value, and the onetime ID is utilized.

The invention relates to an unmanned aerial vehicle vision / inertia integrated navigation method in the unknown environment. The method relates to image processing, inertial navigation calculation and filtering estimation, so that the steps of defining coordinate system, aligning the coordinate system, setting up filter equation and the like are firstly carried out before the main navigation method is implemented. The navigation process of the method comprises five steps: acquiring and pretreating image; extracting feature points by a SIFT method; matching the feature points; updating the filter equation; and carrying out the filtering estimation on the updated filter equation. The method only needs the current ground image instead of specific external information for matching, so as to be used in any environment (including underwater, shelter, canyon, underground and the like) in theory; furthermore, the method has the advantages of good sheltered property and high accuracy.

A disruptive camouflage pattern system to be used for both military and civilian applications. The system includes specialized techniques for printing the camouflage pattern system unto fabric. The system provides camouflage in both the human visible light and the near infrared range. The system depends on macro pattern resulting from a repeat of a micro pattern. The coloring used includes at least four colorings from dyes that in combination produce a percent reflectance value comparable to that of the negative space of the camouflaged subject's surroundings. The system functions by a macro pattern being disruptive of the subject's shape and a micro pattern having sharp edge units of a size capable of blending the subject into its background. The relative lightness values and percentages of total pattern, wet or dry, are sufficient to produce a percent reflectance of acceptable colors, in terms of lightness values unlike current four-color camouflage.

The present invention relates to a method and device for improving concealment of frame erasure caused by frames of an encoded sound signal erased during transmission from an encoder (106) to a decoder (110), and for accelerating recovery of the decoder after non erased frames of the encoded sound signal have been received. For that purpose, concealment / recovery parameters are determined in the encoder or decoder. When determined in the encoder (106), the concealment / recovery parameters are transmitted to the decoder (110). In the decoder, erasure frame concealment and decoder recovery is conducted in response to the concealment / recovery parameters. The concealment / recovery parameters may be selected from the group consisting of: a signal classification parameter, an energy information parameter and a phase information parameter. The determination of the concealment / recovery parameters comprises classifying the successive frames of the encoded sound signal as unvoiced, unvoiced transition, voiced transition, voiced, or onset, and this classification is determined on the basis of at least a part of the following parameters: a normalized correlation parameter, a spectral tilt parameter, a signal-to-noise ratio parameter, a pitch stability parameter, a relative frame energy parameter, and a zero crossing parameter.

The invention provides a method for barrier perception based on airborne binocular vision. The method comprises the following steps of setting a coordinate system of an airborne binocular vision camera, calculating a formula for conversion between the coordinate system and computer image coordinates of an image obtained by the airborne binocular vision camera according to the coordinate system, wherein the airborne binocular vision camera comprises a left camera and a right camera, extracting characteristic points of an image obtained by the airborne binocular vision camera, carrying out a characteristic vector description process on the characteristic points, carrying out stereo matching of left and right images according to characteristic vectors of the characteristic points to obtain preliminary matching point pairs, eliminating error matching in the preliminary matching point pairs to obtain final matching point pairs, creating a disparity map according to the final matching point pairs, and carrying out barrier perception according to the disparity map. The method for barrier perception based on airborne binocular vision has the advantages of strong adaptability, good instantaneity and good concealment performance.

A method of modifying the operation of the encoder function and / or the decoder function of a perceptual coding system in accordance with supplemental information, such as a watermark, so that the supplemental information may be detectable in the output of the decoder function. One or more parameters are modulated in the encoder function and / or the decoder function in response to the supplemental information.

The invention relates to an intelligent pan with a temperature measuring function. The intelligent pan comprises a pan body and a handle, and is characterized in that an attached bottom is arranged on the bottom face of the pan body, a thermocouple is arranged at the joint of the pan body and the attached bottom, the detection end of the thermocouple is hidden near the center position of the bottom face of the pan body and makes contact with the bottom face of the pan body, and a temperature measuring structure for directly detecting the center position and periphery of the pan body is formed; a circuit board and a battery are arranged in the handle, a signal acquiring and processing circuit and a wireless signal output circuit are arranged in the circuit board, the signal output end of the thermocouple is connected with the signal input end of the signal acquiring and processing circuit, the output end of the signal acquiring and processing circuit is connected with the input end of the wireless signal output circuit, and the output end of the wireless signal output circuit is externally communicated with kitchen equipment or wireless communication equipment in the mode of transmitting wireless signals outwards. The temperature measuring structure for directly detecting the center position and periphery of the pan body is formed, and the advantages of being uniform in distribution of temperature measuring points, good in hiding performance, firm, durable, safe to use, precise in temperature measuring, wide in temperature measuring range, high in efficiency and simple in manufacturing process are achieved.

Disclosed are articles having a color shifting film and indicia located behind the color shifting film. The indicia include at least a first and second colored portion, the first portion including a first fluorescent colorant. The second colored portion is non-fluorescent but has a color similar to that of the first portion to enhance concealment of the indicia under certain viewing conditions. At least one of the colored portions is patterned.

The invention provides a household security system which comprises a home gateway, sensors and a zigbee wireless transceiver, wherein the zigbee wireless transceiver is used for providing information interchange between the sensors and the home gateway; the home gateway comprises a central processor and further comprises a camera interface for connecting a camera, a UART (Universal Asynchronous Receiver / Transmitter) serial port interface, an Ethernet interface, an SPI (Single Program Initiation) interface, an LCD (Liquid Crystal Display) interface and an I / O (Input / Output) interface which are arranged on the central processor; the central processor comprises a master chip s3c6410 based on an ARM11 framework and a peripheral circuit; the camera interface is a USB (Universal Serial Bus) interface capable of connecting a USB camera; the UART serial port interface is connected to a MC35iGSM module; the I / O interface is connected to a voice alarm; and the sensors comprise a fire detector, an antitheft detector and a gas detector. A complex wiring process for mounting the household security system is omitted, thereby realizing multi-point and remote transmission of security information, promoting safety and reliability as well as hidden performance of the household security system, and lowering the cost.

The invention discloses a novel modular bionic underwater robot based on full-flexible pectoral fins. A hydrodynamic module of eagle ray pectoral fins is analyzed, and motion of the pectoral fins is decomposed into vertical bending flapping in the vertical body longitudinal axis direction and twisting motion taking the vertical body longitudinal axis direction as the axis. The whole robot comprises a sectioned main body, a left flexible pectoral fin module, a right flexible pectoral fin module and a tail fin module, and a group module is formed by connecting fin connecting parts; the left and right flexible pectoral fin modules are identical in structure and are in mirror symmetry; a pectoral fin framework adopts a structure similar to that of a plane rib, a symmetrical airfoil is taken as the basic shape, and the pectoral fin modules with streamline sections are spliced through serial connection of straight pectoral fin trunk bones and steel wires. A large steering engine and a small steering engine are arranged at the root and the tip of each pectoral fin to control vertical flapping and twisting motion of each pectoral fin. Through adjustment of motion amplitude, motion frequency and phase difference of the two steering engines of each pectoral fin, different pectoral fin motion postures can be realized, and fish body motion can be finished better.

The invention provides a personnel safety management system and method of a residential community. According to the system and method based on artificial intelligence, vehicle management is compatiblewith visitor management, and the problems that that manual management for personnel safety in the community is not high and residents and visitors cannot be identified effectively are solved. Artificial intelligence mainly uses face detection and identification, and the community personnel safety management system comprises a central server and sub systems including a vehicle management system, amulti information collection point system, an intelligent access control management system, a face detection identification system, a database storage system and a visitor management system.

The invention discloses a remote air-to-air missile multi-platform cooperative guidance system and a realization method thereof. The multi-platform cooperative guidance system comprises an early warning plane module, a ground base radar detecting module, an aerial carrier module, a friend plane module, a remote air-to-air missile module, a target information space-time normalizing module and a target information fusion module. The realization method comprises the following steps: 1. an early warning plane, a ground base radar guided aerial carrier and a friend plane fly to a war area; 2. the radar of the friend plane operates to detect a target, and the aerial carrier launches an air-to-air missile; and 3. the targets detected by the radar of the early warning plane, the ground base radar and the radar of the friend plane are fused, and the friend plane carries out midcourse guide on the air-to-air missile. By adopting a multi-platform combat network formed by the early warning plane, the ground base radar, the aerial carrier and the friend plane to provide high-accuracy target information for the remote air-to-air missile, and adopting the friend plane to perform midcourse guide on the remote air-to-air missile, a remote target can be attacked stealthily and accurately.

The present invention relates to a touch panel comprising a structure body comprising: a substrate; a conducting pattern that is provided on at least one surface of the substrate; and a light absorption pattern provided on at least one surface of the conducting pattern and provided on at least a portion of regions corresponding to the conducting pattern, and a method for manufacturing the same.

A silicone adhesive for a semiconductor element that is suitable as a die bonding material for fixing a light emitting diode chip to a substrate. The adhesive includes (a) an addition reaction-curable silicone resin composition having a viscosity at 25° C. of not more than 100 Pa·s, and yielding a cured product upon heating at 150° C. for 3 hours that has a type D hardness prescribed in JIS K6253 of at least 30, (b) a white pigment powder having an average particle size of less than 1 μm, and (c) a white or colorless and transparent powder having an average particle size of at least 1 μm but less than 10 μm. The adhesive exhibits high levels of concealment, effectively reflects light emitted from the LED chip, and also exhibits favorable chip positioning properties, superior adhesive strength, and excellent durability.

Data is analysed by an independent component analysis to derive a transform matrix W encoding properties of the data. The data is encoded using this transform matrix W, and a watermark is embedded into it. Then that the inverse of the transform matrix is applied to obtain watermarked data. The presence of the watermark is found by applying the transform matrix again, and examining the result for the presence of the watermark. The invention is particularly, but not exclusively suitable for data which is image data 10.

The invention relates to a micro-strapdown altitude heading reference system and a working method of the micro-strapdown altitude heading reference system. The system comprises a data acquisition module, a data processing resolving module and a peripheral communication interface module, wherein the data acquisition module integrates a three-axis gyroscope, a three-axis accelerometer, a three-axis magnetic resistance sensor and an SPI (Serial Peripheral Interface) into an integrated micro-electronic mechanical system sensor; the data processing resolving module adopts a 32-bit ARM (Advanced RISC Machine) microcontroller; and the peripheral communication interface module consists of a serial port level switching chip, an RS-232 interface, a CAN (Controller Area Network) transceiver and a CAN interface. The working method of the system comprises the working steps as follows: the system is electrified and initialized; the system is self-tested; a magnetic field is self-calibrated; initial alignment is conducted; measured attitudes are combined: resolving the information of attitude headings according to initial three-dimensional altitude and altitude resolving algorithm of the strapdown altitude heading reference system, and resolving the three-dimensional magnetic altitude angle according to the compensated magnetic field information and acceleration information, conducting the information merging algorithm and finally obtaining the stable altitude heading reference information; and the altitude heading reference information is sent to application equipment.

The invention provides a broadcast-type network RTK positioning technology, and the technology comprises the steps: determining a virtual reference station position through grid dividing; calculating the observation data of the virtual reference station position; enabling a data center to broadcast differential correction number information to users through a unidirectional communication network; enabling a user terminal to receive a grid table and the observation data of the corresponding virtual reference station position, reforming the RTCM format of data of VRS data, and calculating a positioning results. The technology accords with the VRS data processing principle, employs the conventional GNSS reference station facility, just carries out proper modification of data processing software and data calculating software in moving station equipment, can achieve the centimeter-level real-time positioning, and can be widely used in many industries because the technology is small in introduction investment, is high in adaptability, is good in privacy and is infinite in number of users.

The invention discloses a monocular video based real-time posture estimation and distance measurement method for a three-dimensional rigid body object, comprising the following steps: collecting the observation video of the object through an optical observation device; feeding the image sequence obtained from collection into an object segmentation module to obtain an two-value segmentation image and an contour image of the object; extracting the characteristic vectors of contour points of the target to generate a multiple-characteristic drive distance image; establishing the tentative homonymic characteristic correspondence between an input two-dimensional image sequence and the objective three-dimensional model; inverting the three-dimensional posture and distance parameters of the object in the image; feeding back the three-dimensional posture and distance parameters of the object obtained from inversion; and correcting and updating the tentative homonymic characteristic correspondence between the two-dimensional image sequence and the objective three-dimensional model until the correspondence meets the iteration stop condition. The method does not need three-dimensional imaging devices, and has the advantages of no damage to observed objects, good concealment, low cost and high degree of automation.

Public-key cryptography is realized by means of PKI in which biometrics data, in which biological information of users is converted to numerical values, are used to authenticate users that transmit and receive data, and based on the biometrics data, identical secret keys (common secret keys) are generated in each of the user terminal devices that are used by the users without releasing the secret keys onto the network.

The invention relates to a polarization-based early warning system of a distributed optical fiber oil transporting pipeline, which comprises a laser. A forward-propagating optical signal sent from a laser is input from a first port of a polarization beam splitter, and output from a second port to sensing optical fiber connected with a Faraday polariscope. The forward-propagating optical signal is reflected by the Faraday polariscope, and becomes a backward-propagating optical signal after the polarization state of the signal rotates 90 DEG. The backward-propagating optical signal is input from the second port of the polarization beam splitter, and output from a third port to a photoelectric detector. The changed electrical signal is transmitted to a digital signal processing subsystem. The early warning system can position a sensing line perturbing point according the time information of electric power change so as to output alarm and positioning information. The early warning system has the advantages of low cost, high safety and reliability. Furthermore, the early warning system can early position and warn against acts of sabotage to the oil transporting pipeline.

The invention relates to an amphibious bionic robot which is characterized in that the amphibious bionic robot includes a sealed main cabin body and four propeller leg complex propelling mechanisms. A control device, a power supply device and a waterway environment detection sensor are arranged in the main cabin body; the four propeller leg complex propelling mechanisms are opposite in pairs and symmetrically arranged on two sides of the main cabin body; each propeller leg complex propelling mechanism includes two driving rods, a driven rod and a swing propeller; one end of each driving rod is respectively connected with the output ends of two motors; one driving rod is close to the middle part of the main cabin body, and the other end of the driving rod is connected with one end of the swing propeller through a rotating shaft; the other driving rod is close to the outer side of the main cabin body, the other end of the driving rod is connected with the driven rod through a rotating shaft; the driven rod is connected with the middle position of the swing propeller, the other end of the swing propeller is an execution tail end. The amphibious bionic robot has the advantages of good adaptability to environment, stability and reliability, and flexible movement, thereby the amphibious bionic robot can complete various tasks for prospecting, working, etc. in marshes and offshore water, and play an important role in an offshore landing battle in the future.

The present disclosure provides a fingerprint recognition apparatus, a fingerprint recognition method and a terminal device for the same. The fingerprint recognition apparatus comprises: a fingerprint acquisition module, used for acquiring fingerprint data of a detected finger after the detected finger is placed on a fingerprint detection region, wherein the fingerprint detection region is located above a plurality of pressure detection regions; a pressure acquisition module, used for acquiring a pressure value of each pressure detection region that is pressed by the detected finger; a fingerprint authentication module which is coupled to the fingerprint acquisition module and is used for verifying whether the acquired fingerprint data is matched with pre-stored fingerprint data; and a press authentication module which is coupled to the pressure acquisition module and is used for verifying whether the pressure value of each pressure detection region is matched with a preset pressure value interval. According to the fingerprint recognition apparatus, the fingerprint recognition method and the terminal device for the same, which are provided by the present disclosure, precision of fingerprint recognition can be improved, and privacy and property security of a user of an electrical device can be protected.

The invention discloses a stealth single-hull small waterline area hydrofoil unmanned ship sailing on water and a sailing method. The upper portion of the stealth single-hull small waterline area hydrofoil unmanned ship is provided with a control cabin, the middle portion comprises posts, and the lower portion is a submerged body. The front section of the submerged body is a submerged body bow, the middle section of the submerged body is a submerged body middle part, and the rear section of the submerged body is a submerged body stern. Two water ballast spaces, two power supply cell boxes and a hydrofoil control mechanism are arranged inside the submerged body middle part of a hull. The two water ballast spaces are symmetrically arranged front and back; the two power supply cell boxes symmetrical front and back are arranged between the two water ballast spaces; and the hydrofoil control mechanism is arranged in the center of the space between the two power supply cell boxes. A pair of hydrofoils is symmetrically arranged on the left side and the right side outside the submerged body middle part of the hull. A main motor, a coupler, a main shaft and a tail vane control mechanism are arranged inside the submerged body stern of the hull. A pair of tail vanes is symmetrically arranged on the left side and the right side outside the submerged body stern of the hull. The stealth single-hull small waterline area hydrofoil unmanned ship has excellent seakeeping, speedability and resistance properties, and can achieve the three navigational statuses of body navigation, winging operation and submerge navigation.

Wireless devices and methods employ steganography for a variety of purposes. An exemplary application is a battery-powered cell phone, having, e.g., a microphone, a speaker, a modulator, an antenna, and an RF amplifier. In such application, steganographic techniques can be employed to encode, or decode, signals processed by the phone. Some embodiments use an image sensor to capture watermarked image data. The phone can respond to detection of such marked imagery by overlaying distinctive graphics on a cell phone display screen. Such graphics may be positioned within the display, and affine-warped, in registered relationship with the position of the watermarked object, and its affine distortion, as depicted in the image data.

The invention relates to a character pitch encoding-based dual-watermark embedded text watermarking method, comprising the following steps of: converting watermark information M and a key D, which are required to be hidden, into a binary sequence, circularly executing modulus to get an encrypted binary sequence, adding error-correcting codes for the to-be-embedded watermark information, and finally embedding dual watermarks and synchronization information of the watermarks by encoding the attribute of a text object without page modification and encoding a character pitch. With the method, the text content cannot be changed, the watermark information is hidden well, and the method has the characteristics of high robustness and high capacity. By extracting the embedded watermark information, transmission and modification of a document can be controlled effectively, and whether the document is modified can be judged, and finally, the aims of digital copyright protection, data integrity authentication and safe covert communication for the text document are achieved.

The invention discloses a monitoring method for a continuous-variable quantum key distribution system. The method is used for monitoring a quantum channel between a sender and a receiver of the continuous-variable quantum key distribution system. The receiver comprises a balanced homodyne detector. The balanced homodyne detector comprises a 50:50 BS and an AM. According to the non-ideality of relevance between the transmittance and the wave length of the 50:50 BS of the balanced homodyne detector, two kinds of de-noising light are introduced besides spurious signal light and spurious local oscillation light, and therefore the extra noise caused by acquiring and resending behaviors of a monitor is eliminated.

The invention provides an unmanned aerial vehicle directional antenna self-tracking system design method which is used for unmanned aerial vehicle control. According to the method, a GPS receiver is installed on a carrier vehicle to acquire the position and speed of a directional antenna in real time. The tracking target angle of the directional antenna is acquired by a master controller via utilizing the position of the directional antenna and an unmanned aerial vehicle. Position prediction smoothing is realized by utilizing speed of the directional antenna and the unmanned aerial vehicle, and feedforward is increased for azimuth movement when the unmanned aerial vehicle flies over the vertex of the directional antenna. Azimuth angle and pitch angle measuring instruments are installed on the carrier vehicle to measure the current azimuth angle and the pitch angle of the carrier vehicle, and the current angle of the directional antenna is acquired via combination of the measured value of an angle sensor. The control variable is calculated by the master controller according to the difference value of the tracking target angle and the current angle of the directional antenna so that the directional antenna is driven to reach the target position. System mobility and concealment are enhanced, project realization is easy, tracking movement of the directional antenna is effectively smoothed, vertex passing tracking error is reduced and system reliability and adaptability are enhanced.

The invention provides a single-frequency network-based passive radar system and a signal processing method for the same. A plurality of illumination sources for the system are used for simultaneously transmitting the same signals at the same frequency, and namely work in a single-frequency network system. A plurality of transmission stations and one or more receiving stations form a MISO (multiple-input single-output) or MIMO (multiple-input multiple-output) detection system, wherein the MIMO system is provided with a fusion center for performing communication and data transmission with each receiving station through a communication link and fusing processing results of each receiving station, and works at the same frequency; each transmission station is in the same form, and each receiving station is in the same form. A one-stop space-domain processing and single-frequency network defuzzification method is adopted for the signal processing method. According to the system and the method, a conventional broadcasting single-frequency network is used under the condition of no interference on broadcasting, so that the problems of severe clutter caused by the single-frequency network and fuzziness of the single-frequency network are solved, and the advantages of single-frequency network detection in frequency power reduction, hardware saving, detection stability and tracking continuity are fully exerted.