159results about How to "Accurate and reliable detection" patented technology

A flow-based intrusion detection system for detecting intrusions in computer communication networks. Data packets representing communications between hosts in a computer-to-computer communication network are processed and assigned to various client/server flows. Statistics are collected for each flow. Then, the flow statistics are analyzed to determine if the flow appears to be legitimate traffic or possible suspicious activity. A concern index value is assigned to each flow that appears suspicious. By assigning a value to each flow that appears suspicious and adding that value to the total concern index of the responsible host, it is possible to identify hosts that are engaged in intrusion activity. When the concern index value of a host exceeds a preset alarm value, an alert is issued and appropriate action can be taken.

A method for detecting freewheeling skew failures in the wing flaps of an aircraft includes measuring the outputs of flap skew sensors when the aircraft is in flight (IF) and the flaps are extended to a selected position, and when the aircraft is next on the ground (OG) and the flaps are extended to the selected position. The respective differences between the IF and OG outputs of symmetrical pairs of the flap skew sensors are computed, and then the respective difference between the computed IF output difference and the computed OG output difference of each symmetrical pair of the sensors is computed. The computed IF and OG difference of each symmetrical pair of the sensors is then compared with each of predetermined maximum and minimum threshold value to determine whether a freewheeling skew failure exists in any of the flaps of the aircraft.

A method and improved apparatus for detecting leaks in pressurized pipeline systems, which compensate for the thermally induced volume changes of the liquid in the line during a test that are produced by both the nonlinear changes in the mean temperature of the liquid and the pressure-induced perturbations of the temperature of the liquid.

A display device (120) has a 3D display (160) for emitting at least two views of 3D image data to enable autostereoscopic viewing of 3D image data at multiple viewing positions (182, 184). A processor (140) processes the 3D image data (122) for generating the views for display on the 3D display, and a viewer detector (130) detects a viewer position of a viewer in front of the 3D display. The processor has a viewer conflict detector (141) for detecting and resolving viewer position conflicts. The detector obtains at least a first viewer position of a first viewer via the viewer detector, and detects a viewer position conflict at the first viewer position where said first view and second view do not provide the 3D effect for the first viewer. If so, the detector controls generating the views in dependence of the detected viewer position conflict. At least one of said at least two views as received by the first viewer is dynamically modified to signal or resolve the conflict.

An echo detector correlates between an incoming signal an echo signal to determine echo delay. A preprocesssor extracts a characteristic pattern such as a binary pattern derived by thresholding an averaged power of each signal. This pattern is down sampled then used for the correlation, and delay is deduced from peaks in the correlation. Advantages include reduced computational load, or larger correlation window size, because the characteristic pattern is easier to correlate. The quantising can enhance the correlation peaks, and the averaging can limit the number of transitions, to give more robustness to noise. An echo canceller has a coarse echo delay estimator and a fine echo delay estimator. The coarse estimated delay is used to adjust a delay detection range of a fine delay detector having a narrow range. The output of the fine detector is used to adjust or suppress the adaptive echo canceller.

A characteristic point detection method, including the steps of: detecting a candidate of each of a plurality of characteristic points of a predetermined object from a detection target image; obtaining an existence probability distribution for a target characteristic point with respect to each of the detected candidates of the other characteristic points, which is an existence probability distribution of the target characteristic point when the position of the detected candidate of another characteristic point is taken as a reference, using an existence probability distribution statistically obtained for each combination of two different characteristic points of the plurality of characteristic points; integrating the obtained existence probability distributions by weighting according to the positional relationship between the reference characteristic point and target characteristic point; and estimating the true point of the target characteristic point based on the magnitude of the existence probabilities in the integrated existence probability distribution thereof.

A receiver for detecting and recovering data from Orthogonal Frequency Division Multiplexed (OFDM) symbols. The OFDM symbols include within a repeating time frame a signalling OFDM symbol and one or more data bearing OFDM symbols, the signalling OFDM symbol including a pre-amble guard interval and a post-amble guard interval, the pre-amble and the post-amble guard intervals being formed by copying samples from a useful part of the signalling OFDM symbol in the time domain. The receiver includes a signalling and guard detector, which includes a correlator comprising a first branch which includes a first moving averaging filter, which is arranged to form pre-amble average correlated samples by averaging a value of a plurality of pre-amble correlated samples within a moving window, the plurality of samples averaged within the moving window corresponding to a temporal length of the post-amble (Tb), a second branch which includes a second moving averaging filter, which is arranged to form post-amble average correlated samples by averaging a value of a plurality of post-amble correlated samples within a moving window, the plurality of samples averaged within the moving window corresponding to a temporal length of the pre-amble (Tc), a combiner, which is arranged to combine the averaged pre-amble correlated samples and the averaged post-amble correlated samples to form output correlation samples. A post processing detector can detect the signalling OFDM symbol and moreover a synchronisation point derived from a centre of the signalling OFDM symbol with improved accuracy. The receiver finds application, for example, with DVB-T2 in detecting the P1 symbol.

The invention discloses an automatic automobile following system and method for an automatic driving automobile. The system comprises an environment sensing system, a main control system and an automobile following decision system, wherein the environment sensing system detects environmental information of the automobile and transmits an obtained signal to the main control system and the automobile following decision system; and the main control system and the automobile following decision system control the automobile to run according to the information detected by the environment sensing system. According to the system, based on L3-level automatic driving vehicles, in the automatic driving process of the vehicles, whether to cut in the following driving control and when to cut out the following driving control can be intelligently judged according to sensing conditions, and thus driver control is not required, so that the intelligent level of the vehicles is improved.

The invention discloses a hot spot data detection method and device. The method comprises the following steps: detecting the value of a data block k according to a correlation coefficient between the data block k and one or more data blocks and the reading-writing frequency of the data block k, wherein the correlation coefficient represents the reading-writing correlation degree of two data blocks; determining whether the data block k is a hot spot datum or not according to the value of the data block k and a preset data migration strategy. According to the method, the value of the data block is determined according to the correlation coefficient of the data block, and a determination on whether the data block is a hot spot datum or not is made according to the value of the data block, so that hot spot data detection is more accurate and reliable than the conventional method, the efficiency of data migration is increased, migration of hot spot data in the inner magnetic track and the outer magnetic track of a magnetic disk according to values is realized, the access performance of the magnetic disk can be improved effectively, and the overall performance of a magnetic disk array is enhanced greatly.

A wrist worn device includes a device body and a strap. A display screen is provided on the device body. The display screen is rotated relative to a normal to the display screen in a clockwise direction for a watch shaped to be worn on the left arm and in an anti-clockwise direction for a watch shaped to be worn on a right arm. A touch sensor is provided on a right edge of a watch for wearing on a left arm and a button sensor is provided on a lower left edge of a watch for wearing on a user's left arm. The touch sensor and the button sensor may be provided in a mirrored orientation on a watch for wearing on a user's right arm.

A device and a corresponding method for skin detection to enable a reliable, accurate and fast detection are disclosed. The proposed device comprises an illumination unit configured to project a predetermined illumination pattern onto a scene, an imaging unit configured to acquire an image of the scene, and an evaluation unit configured to evaluate the acquired image by analyzing the imaged illumination pattern as reproduced in the image and to detect skin areas within the image and distinguish them from non-skin areas within the image based on said analysis.

The invention discloses a traffic jam auxiliary control method, and the method comprises the steps: carrying out lateral control and longitudinal control of a vehicle when the function of a traffic jam auxiliary system is activated; during transverse control, when a lane line exists, controlling a vehicle to run in the middle according to the lane line detected by a vehicle sensor, and when no lane line exists or the lane line is not clear, controlling the vehicle to transversely deviate along with a front vehicle; during longitudinal control, calculating the target vehicle speed of the vehicle according to front vehicle data, carrying out coupling speed limiting control on the target vehicle speed in combination with the road curvature information, the current steering wheel angle and thetarget steering wheel angle obtained through transverse control, controlling the target vehicle speed, and obtaining an expected vehicle acceleration. The vehicle is automatically controlled to carryout acceleration, deceleration, steering and other operations according to environmental perception, transverse and longitudinal coupling control is carried out on the vehicle, the safety and stability of the vehicle during high vehicle speed or curve control are guaranteed, the vehicle can still run along with a front vehicle when a lane line is not clear, and TJA function application scenes aregreatly increased.

In a vehicle voltage control apparatus which regulates the output voltage of the vehicle electric generator and which receives an external control signal for lowering the regulated voltage value, from an external apparatus such as the engine ECU during engine starting, a circuit detects the occurrence of engine starting based upon the frequency of an AC voltage produced by the generator or upon the level of output voltage produced by the generator. The regulated voltage value is set to a substantially low level, predetermined for use during engine starting, only while the control signal is being received concurrent with engine starting also being detected.

A micromechanical sound transducer according to a first aspect includes a first bending transducer with a free end and a second bending transducer with a free end, the two bending transducers being arranged in a mutual plane, wherein the free end of the first bending transducer is separated from the free end of the second bending transducer via a slit. The second bending transducer is excited in-phase with the vertical vibration of the first bending transducer. A micromechanical sound transducer according to a second aspect includes a first bending transducer that is excited to vibrate vertically and a diaphragm element extending vertically to the first bending transducer, the diaphragm element being separated from a free end of the first bending transducer via a slit.

A receiving apparatus (1) for receiving signals in a digital telecommunication system and a synchronizing method for synchronizing the receiving apparatus (1). The receiving apparatus (1) includes a receiver (2, 3) for receiving a reference symbol having at least two repetition patterns. One of the, repetition patterns is phase-shifted in relation to the other. The receiving apparatus (1) is synchronized in the digital telecommunication system using the received reference symbol. The synchronization includes a cross correlation of at least one of two repetition patterns within a cross correlation window having a predetermined length. In this manner, the performance and the accuracy of a cross correlation peak detection can be enhanced for improved synchronization.