762 results about "Active detection" patented technology

A system and method is provided for detecting an island condition using active detection. The active detection involves biasing the voltage, frequency, current or phase of a distributed resource connected to a utility network. Biasing the distributed resource involves inducing a change of voltage, frequency, current or phases above or below the normal operating values. The impact of this biasing on the system operating parameters can then be measure to determine if an island condition exists. Once an island condition has been detected, the system can initiate an anti-islanding procedure to remove the distributed resource from the utility network such as opening a breaker connecting the distributed resource to the network. Additionally, the system and method can include a passive element for detecting frequency and voltage (or other parameters) shifts above certain points.

The invention provides an automatic vulnerability validation method. The method comprises the steps that firstly, validation information is collected, wherein an active detection way is adopted for carrying out information detection, topological detection, vulnerability detection and website directory structure detection on a target; secondly, the validation information is packaged, wherein suspicious vulnerability key information in vulnerability detection results is extracted, uniform-interface modularized packaging is carried out on the data; thirdly, a validation strategy is searched for, wherein according to the suspicious vulnerability identity and variety information, an appropriate attack script template and a vulnerability utilizing tool are selected; vulnerability validation is carried out, wherein scripts are called to be loaded into the packaged vulnerability information to carry out validation attack, and an utilization voucher is obtained and stored; fifthly, validation traces are removed, wherein validation attack traces are removed, sessions are recycled; finally, a scanning report is generated. The automatic vulnerability validation method solves the problem that an existing vulnerability scanning system is high in false alarm rate and cannot carry out effective validation, is automatic and procedural, can automatically recognize and validate vulnerabilities, lowers the requirement for the ability of non-professional staff and improves the vulnerability validation efficiency.

An imaging system and methods for resolving elements of interest through and obscuring environment by removing undesired signals from the intervening, obscuring environment is disclosed. A passive hyperspectral imaging sensor is calibrated and integrated into a system having a positioning and attitude detection system and an instrument control and data acquisition system that records data from sensors in a three-dimensional data cube having two spatial dimensions and a spectral dimension. Either an active detection and ranging system or a look-up-table approach or both are used to remove the noise generated by the intervening, obscuring environment from the data relevant to the elements of interest.

The invention provides a micro-gesture identification method and system based on ultrasonic active detection. The method includes the following steps of emitting an ultrasonic signal and receiving an ultrasonic echo signal, reflected by an identified gesture action, of the ultrasonic signal; comparing the ultrasonic signal with the ultrasonic echo signal to obtain the reception time delay and frequency resolution variance of the ultrasonic signal and the ultrasonic echo signal; according to the reception time delay and frequency resolution variance, obtaining the distance and velocity information of the timing sequence in the ultrasonic echo signal; and according to the distance and velocity information, performing identification and determination on the identified gesture action through a data driving pattern recognition algorithm. The micro-gesture identification method and system can accurately identify the micro-gesture actions and have the advantages of high resolution, high robustness, low consumption, and low algorithm complexity.

A method of active detection of at least one threat to the homeland security. Each such threat is either hidden inside at least one cargo container before transit, or is placed inside at least one cargo container while in transit; each such threat while interacting with its surrounding generates a unique threat signature. The method comprises the following steps: (A) substantially continuously probing each cargo container; (B) detecting at least one threat signature; (C) processing each detected threat signature to determine a likelihood of at least one threat to become a threat to the homeland security; (D) identifying at least one container that includes such threat to the homeland security; and (E) eliminating such threat to the homeland security.

The wireless upgrading method includes steps: obtaining information of upgrade file from database of upgrade file; carrying out comparison between information of upgrade file and information of current file of logged wireless terminal, and sending out selectable prompting message based on the compared result; returning back file list to be upgraded to wireless terminal based on information of upgrading request sent from user; downloading and upgrading the upgrade files confirmed by user based on acknowledge information of user. Detecting software of wireless terminal by server end, the invention does not need client end to carry out active detection so as to simplify user's operation. The disclosed method and system can carry out automatic switching between WTCP and TFTP two communication protocols, and support breakpoint transmission.

A semi-conductor imaging device, for example for x-ray imaging, uses a detector substrate exposable to incident radiation and having a plurality of charge collection contacts for collecting charge therefrom, the detector substrate being arranged in front of a readout substrate carrying or comprising readout circuitry, the readout substrate using a first region with a respective cell circuit coupled to each charge collection contact for receiving signals from the detector substrate, and a second region with further circuitry, and such that the charge collection contacts are arranged over both the first and second regions of the readout substrate. A conductive path connects each charge collection contact over the second region with a respective terminal for contacting an input of a cell circuit in the first region. The invention enables the part of the detector substrate overlying the additional circuitry to be used as active detection area.

A control system (18) and method for an automotive vehicle (10) used for detecting lift of a wheel includes a passive wheel lift detector (58) that generates a passive wheel lift signal, an active wheel lift detector (60) that generates an active wheel lift signal, and an integrated wheel lift detector (62) coupled to the passive wheel lift detector (58) and the active wheel lift detector (60). The integrated wheel lift detector (62) generates a final wheel lift signal in response to the passive wheel lift signal and the active wheel lift signal. The final wheel lift signal may be used to control a safety device such as a rollover prevention system.

An apparatus and method for detecting a connection to a data transmission network functions by detecting the network signal energy on a network cable while avoiding the problems of excessive power consumption and generation of excessive electrical noise. By monitoring the receive network lines and determining if there is electrical energy on the cable in the form particular to the type of network supported by the network adaptor card, the host computing device can power-down the transceiver associated with the network adaptor card until an active network connection is detected.

The invention relates to an island detection method of a photovoltaic grid-connected system. In views of the problems that independently-adopted passive detection mode is effective only when effective when mismatching degrees of source and load are large and a large non-detection zone (NDZ) can be accordingly provided; and when an active detection mode is independently-adopted, the system is disturbed, and therefore the disturbance results in instability of the system, and accordingly over-voltage / under-voltage is provided. An over-frequency / under-frequency detection method is combined with an improved impedance detection method to conduct island detection to the system, and therefore the NDZ is reduced to a minimum, quality of electric energy is improved and total harmonic distortion (THD) is reduced.

The invention discloses a network asset fingerprint identification method, system and device, and the method comprises the steps: carrying out the detection of a survival host under a target IP segment through an asynchronous stateless scanning mechanism, storing the address of the survival host in an asset scanning queue, and carrying out the asset identification task distribution of the survivalhost under the asset scanning queue; and setting an initial fingerprint hit rate for pre-stored common asset fingerprint data, and calling an asset detection engine to perform asset fingerprint identification on the survival host in the asset scanning queue through active detection and fingerprint rule feature library matching based on the fingerprint hit rate.

The invention provides a neighbor finding method for a directional Ad Hoc network. An antenna active detection/passive monitoring mode of a node is determined based on the binary coding bit of the ID of the node, a channel resource is divided into a plurality of sub-channels through the CDMA or the OFDM technology, the number of the sub-channel which is occupied by the node is determined through an equal-probability random selection method, the purpose that multiple nodes send information alternately on different channels is achieved, the data collision conflict caused by the fact that the multiple nodes send information to the same node at the same time in the neighbor finding process is effectively reduced, the success probability of finding a neighbor node can be remarkably improved, and network networking time is shortened. By the adoption of the neighbor finding method for the directional Ad Hoc network, the neighbor node can be rapidly found in the Ad Hoc network with directional beam transmission being adopted completely, and the neighbor finding method for the directional Ad Hoc network is suitable for all networking scenes with network density being large from small. The neighbor finding method for the directional Ad Hoc network is easy to achieve, the time spent in finding all the neighbor nodes within a one-hop range is short, and reliability is high.

A method of creating an improved sensitivity capacitive fingerprint sensor involves forming vias from a first side of a sensor chip having an array of capacitive sensors, making the vias electrically conductive, and attaching a cover plate over the first side of the sensor chip spaced from the sensor chip by a distance of less than 25 μm. An improved sensitivity capacitive fingerprint sensor has a capacitive sensor array including multiple sensor cells and electrically conductive, through-chip vias extending from connection points for sensor cell circuitry to a back side of the capacitive sensor array, a chip including active detection circuitry and electrical connection points, the electrical connection points being respectively connected to corresponding ones of the sensor cell circuitry connection points, and a cover plate, disposed above the sensor cells at a spacing of less than 25 μm.

Active disablement of malicious code in association with the provision of on-line financial services. The invention provides for the active detection and disablement of malicious code residing on a customer computer system used for conducting on-line financial transactions. Computer programs residing on a server of a financial institution, such as a bank, direct the download and execution of scanning software by the customer. The scanning is performed as an integral part of the on-line financial transaction process. Computer program instructions for scanning the customer computer system are activated over the network, in some embodiments, through the use of ActiveX controls.

An advanced, back-illuminated, silicon avalanche photodiode (APD) design is presented using silicon-on-sapphire with a novel crystalline aluminum nitride (AlN) antireflective layer between the silicon and R-plane sapphire. The substrate supports optical and electrical integration of a high quantum efficiency silicon APD with a gallium nitride (GaN)-VCSEL diode in each pixel to form a novel, compact, emitter-detector pixel for passive and active 2-D and 3-D high resolution, imaging focal plane arrays. Silicon mesa pixels are anisotropically etched with a central inverted mesa frustum cavity. The APD detector is fabricated in the silicon mesa and the GaN-VCSEL diode is grown epitaxially in the center of the mesa. A sapphire microlens below each pixel collimates the VCSEL beam and focuses optical returns into the APD detector. APDs share a common front-side anode, and VCSELs share a common cathode. The APD cathode is electrically connected to the VCSEL diode anode in each emitter-detector pixel.

The invention discloses an active detection and recognition system and method for a human gait behavior based on semantic folding. Embedded gait behavior detection and recognition system hardware with low power consumption is built by using a three-dimensional sound field positioning system, a sole force field positioning system, an HDMI high-definition camera, a high-definition video acquisition system, a microcomputer Raspberry and the like. Gait semantic energy diagrams with timing characteristics provided by the invention contain gait time information under different situations, and the learning and prediction ability of a gait behavior cognition system can be enhanced according to a lot of gait semantic energy diagrams with timing characteristics. Meanwhile, the active detection and recognition technology for a human gait behavior based on semantic folding has extensive application prospects in various fields which mainly comprises the fields such as long-distance identity recognition, abnormal gait behavior detection, pedestrian behavior prediction and mass video retrieval, and has excellent economical and social benefits.

An active detection type radio frequency identification (RFID) smart door lock controller includes a door lock controller having a triggering unit with an infrared sensing module for transmitting an infrared signal. The door lock controller further includes a reading unit and a control unit operatively coupled to a door lock. A user information is stored in an electronic tag unit having an RFID module. The triggering unit is activated when the infrared signal is blocked by the electronic tag unit and actuates the reading unit to activate the RFID module by a first RFID signal. The user information is sent by the RFID module to the reading unit by a second RFID signal and is then sent to the control unit. The control unit compares the user information with a user information stored in the control unit to decide whether or not to unlock the door lock.