630results about How to "Quick estimate" patented technology

This invention provides a system and method for the design, prediction, and control of wireless communication networks by combining RF channel data from multiple lookup tables, each of which correlates an RF channel characteristic to some higher order network performance metric. Network performance predictions, and resulting network control instructions, are produced from look-up tables of measured or predicted data relating one or more RF channel characteristics to one or more network performance metrics. These lookup tables are uniquely constructed by site-specific location, technology, wireless standard, or equipment types.

Motion estimation is the science of predicting the current frame in a video sequence from the past frame (or frames), by slicing it into rectangular blocks of pixels, and matching these to past such blocks. The displacement in the spatial position of the block in the current frame with respect to the past frame is called the motion vector. This method of temporally decorrelating the video sequence by finding the best matching blocks from past reference frames—motion estimation—makes up about 80% or more of the computation in a video encoder. That is, it is enormously expensive, and methods do so that are efficient are in high demand. Thus the field of motion estimation within video coding is rich in the breadth and diversity of approaches that have been put forward. Yet it is often the simplest methods that are the most effective. So it is in this case. While it is well-known that a full search over all possible positions within a fixed window is an optimal method in terms of performance, it is generally prohibitive in computation. In this patent disclosure, we define an efficient, new method of searching only a very sparse subset of possible displacement positions (or motion vectors) among all possible ones, to see if we can get a good enough match, and terminate early. This set of sparse subset of motion vectors is preselected, using a priori knowledge and extensive testing on video sequences, so that these “predictors” for the motion vector are essentially magic. The art of this method is the preselection of excellent sparse subsets of vectors, the smart thresholds for acceptance or rejection, and even in the order of the testing prior to decision.

The invention discloses a system and method for estimating a three-dimensional (3D) packaging size of an object. The method has a self calibration function to correct the scale in the measurement environment so as to reduce errors caused by human operations. The system comprises an image capture unit for capturing images of the measurement environment and objects; a scale correction unit for performing the calibration using a reference object of a known size; and an object size estimation unit for detecting the position of an object to be estimated in the image data received from the image capture unit and estimating the 3D size of the object according to the calibrated scale.

A surface data acquisition, storage, and assessment system for detecting and quantifying similarities or differences between stored data and data collected from a scan. The system operates utilizing a method that decreases the time required for calculating a pose estimate thus increasing its performance making it more practical for applications that require real-time operations. In a preferred embodiment the system comprises one or more sensing components for scanning and measuring surface features of an object for determining the identity of the object, and determines differences between data obtained from two or more scans.

Methods and systems for providing estimated insurance quotes / premiums are described herein. After analyzing rate factors, a subset of rate factors are selected that yield a fairly accurate estimated insurance premium from a minimum amount of information easily obtainable from a user. The user inputs a value from a predetermined set of allowable inputs (value input filter). After receiving and analyzing the user inputs, the system generates one or more estimates and displays the one or more estimates to the user, e.g., via a web page. When multiple estimates are provided, the multiple estimates may differ based on the level of coverage, add-on features, or both. Readily known non-personal identifying information is preferably requested and used, thereby alleviating privacy concerns while still being able to provide an estimate to the user very quickly, e.g., under 30 seconds, once all the requested information is obtained.

A pilot reference transmission scheme well suited for high data rate wireless communication systems is disclosed. To maximize the amount of interference from transmissions from neighboring transmission sources (e.g., access points or base stations) during the pilot interval, and hence minimize the amount of interference from non-transmitting sources during the data intervals, the pilot references are transmitted in bursts at predetermined time intervals, and the pilot bursts from the access points are synchronized. This results in maximum interference contributions from non-transmitting neighboring access points, facilitating reliable estimation of worst case carrier-to-interference (C / I), and further allows the receiving devices (e.g., access terminals) to easily recognize the bursts as pilot reference. In one embodiment, each access point transmits the pilot bursts at or near its maximum transmit power level and no user-specific data is transmitted during the pilot bursts.

Methods and systems for providing estimated insurance quotes / premiums are described herein. After analyzing rate factors, a subset of rate factors are selected that yield a fairly accurate estimated insurance premium from a minimum amount of information easily obtainable from a user. The user inputs a value from a predetermined set of allowable inputs (value input filter), or provides identifying information from which the minimum information may be readily obtained from private and / or vended databases. After receiving and analyzing the user inputs, the system generates one or more estimates and provides the one or more estimates to the user, e.g., via a display screen, printed receipt, SMS messages, etc. Multiple estimates may differ based on the level of insurance coverage, add-on features, or both. The methods and systems provide an insurance estimate to the user very quickly, e.g., under 30 seconds, during a goods or services transaction unrelated to insurance.

The present invention provides a new and unique method and apparatus for providing an estimate of a mobile location of a wireless node, point or terminal in a wireless local area network (WLAN) or other suitable network, the estimate being based on a correlation of a radio frequency (RF) signal strength measurement and a grid point in a signal strength database or radio map. The signal strength database or radio map is built using a signal strength fingerprint algorithm. The signal strength fingerprint algorithm includes selecting and measuring a set of grid points in the wireless local area network (WLAN) or other suitable network.

A method for estimating a precise position of a user device from signals from a low earth orbit (LEO) satellite includes receiving at least one carrier signal at a user device, each carrier signal being transmitted a distinct LEO satellite. The user device processes the carrier signals to obtain a first carrier phase information. The user device recalls an inertial position fix derived at an inertial reference unit. The user device derives a position of the user device based on the inertial position fix and the first carrier phase information.

A method of detecting the location of a failure (e.g., a sudden leak) in a fluid pipeline network, which can be suitably used for estimation of the location of a failure in a water pipeline network, includes the steps of periodically measuring a flow rate or fluid pressure with sensors arranged at a plurality of measuring points along a pipeline in a water pipeline network; comparing a latest measured amount and a previous measured amount at each measuring point to determine if an amount of change at an arbitrary point has exceeded a predetermined value; and calculating a position at which an amount of change becomes maximum, the position being calculated from the magnitudes of the amounts of changes in respective measured values at the time of the detection. The pipeline network may be a water supply and distribution pipeline network which includes a trunk pipeline and branch pipelines.

The invention discloses a quad-rotor UAV fault tolerance control method based on an adaptive fault estimation observer, and belongs to the field of aviation aircraft control. The method comprises thata fault model of a quad-rotor attitude system is established according to a dynamic model of a quad-rotor UAV by considering a performer fault of a UAV system; a performer of the UAV includes four rotor motors in practicality, faults correspond to the four rotor motors, the fault model is processed, the faults are divided into two groups decoupled mutually, and a final attitude fault model is obtained; according to the provided fault model, the adaptive fault estimation observer is designed, corresponding adaptive laws are provided, the performance fault is estimated, and an H(infinite) method and an interval matrix method are used on external disturbance and parameter nondeterminacy respectively in the design process; and an attitude system error fault model is obtained on the basis of the fault model, a dynamic output feedback fault tolerance controller is designed on the basis of a fault estimated value, and fault tolerance control of the quad-rotor UAV is realized. Influence of the performer fault on performance of the quad-rotor UAV can overcome, and the safety and reliability of the UAV in the flight process are ensured fully.

In methods, systems, and computer program products for locating a regularly configured object within a digital image, a plurality of primary rotated integral images of the digital image are computed. Each primary rotated integral image has a different in-plane rotation. A set of secondary rotated integral images are derived from each of the primary rotated integral images. The secondary rotated integral images have further in-plane rotations relative to the respective primary rotated integral image. A window is defined within the digital image and corresponding windows of the rotated integral images. The values of convolution sums of a predetermined set of feature boxes within the window, in each of the rotated integral images are extracted. The dimensionality of the convolution sums is reduced to provide a set of reduced sums. A probability model is applied to the reduced sums to provide a best estimated derotated image of the window.

The invention discloses a traffic-wave theory-based traffic influence area determining method of expressway accidents, which is used for determining space-time influence areas of traffic accidents after the traffic accidents happen on expressways without inlet and outlet ramps. The traffic influence area determining method comprises the following steps of: firstly determining traffic flow and traffic density of the expressways under different traffic conditions, drawing an expressway flow-density map, and then analyzing an accumulating and evanishing process of traffic waves in a process fromthe beginning of the accidents to the elimination of accident influence by using the traffic-wave theory, calculating a traffic wave speed of each stage, drawing a space-time evolution map of the traffic accidents, and finally determining influence time ranges and space ranges of the accidents in each stage. The traffic influence area determining method is simple and convenient and has good stability and high reliability; and according to the traffic influence area determining method, the influence area of the traffic accidents can be timely and accurately forecasted, and stable, timely and reliable traffic accident information can be supplied to the administrative department of the expressway, thereby the implementation efficiency of a rapid traffic accident disposing measure is improved.

A novel apparatus for and method of harmonic characterization and ratio correction of device mismatch between coarse and fine varactor tuning devices within a segmented unified varactor bank of a radio frequency (RF) digitally controlled oscillator (DCO). The DCO uses a single unified bank of varactors that is divided into an MSB bank, LSB bank and sigma-delta (SD-LSB) bank. Any ratio mismatches between MSBs and LSBs are digitally calibrated out using a DCO step-size pre-distortion scheme wherein the LSB steps are adjusted to account for the ratio mismatch between the MSB / LSB step sizes. A harmonic characterization technique is used to estimate the mismatches in the minimal size CMOS tuning varactors of a digitally controlled RF oscillator (DCO), wherein the nominal ratio mismatch between the MSB and LSB devices is estimated using hybrid stochastic gradient DCO gain estimation algorithms. The nominal ratio mismatch and the mismatches in the MSB and LSB banks are used to determine the average MSB / LSB mismatch. The average mismatch value is then used to correct the LSB steps.

The invention discloses a near spacecraft fault diagnosis and fault-tolerant control method. Firstly, a dynamical model of an attitude control system of a reentry phase of a near spacecraft is established and the dynamical model of the attitude control system is transferred to a nonlinear equation in a general type through coordinate transformation; secondly, a fault model with actuator invalidation and actuator dynamic damage existing simultaneously is established; thirdly, real-time online estimation of self-adaption estimation observer to actuator dynamic damage factors and actuator invalidation factors is respectively established; and finally a sliding module fault-tolerant controller is designed through the estimated actuator dynamic damage factors and the estimated actuator invalidation factors and parameters of the controller is updated in real time. According to the near spacecraft fault diagnosis and fault-tolerant control method, in the condition that when the actuator dynamic damage and the actuator invalidation occur simultaneously in a flight control system, fault information can be estimated rapidly and accurately, strong fault-tolerant capacity is achieved and an expected requirement of the flight control system is reached.

The motion vector estimation unit (106) is comprised of: an error calculation unit (202) that calculates errors SAD1 to SAD9 that are differences between the current block data tar_img and the respective neighboring reference block data ref_img; a minimum-error block determination unit (203) that determines, as a minimum-error block, a reference block that includes the smallest error of all the errors SAD1 to SAD9, and outputs a motion vector mvmin corresponding to the position of the determined minimum-error block; an end judgment unit (204) that judges whether or not the motion estimation should be ended; and a search center determination unit (205) that determines, as a reference block serving as the next search center, a reference block that is two pixels or more away from the current search center, according to the position of the minimum-error block.

The invention provides a receiving-end network voltage stabilization overall process situation assessment and prevention and control method based on responses. The method comprises the steps of S1, obtaining various off-line simulation data or real-time measuring data; S2, constructing equivalent power transmission models of nodes according to node practical transfer power; S3, obtaining a node quiescent voltage stability margin index Vsi of equivalent power transmission model parameters of each node; S4, constructing a node reactive compensation assessment index according to the equivalent power transmission model parameters of each node; S5, setting an early warning threshold value Ncr of the node quiescent voltage stability margin index, and calculating a load shedding estimation of a weaker node when the quiescent voltage stability margin index Vsi of each node is smaller than the Ncr. According to the receiving-end network voltage stabilization overall process situation assessment and prevention and control method based on the responses, a weak node or a weak area in a current operating mode can be found out, a rapid estimation of reactive compensation levels and load shedding of each node is achieved, and the method can be widely applied to the fields of power network planning and online security monitoring.

The invention relates to an estimation method of battery dump energy based on combined sampling point Kalman filtering, and aims to solve the problem that the prior method cannot meet the requirement of online detection and has poor precision. The estimation method comprises the following steps: firstly, measuring battery terminal voltage yk and battery supply current ik at k moment through a measuring circuit; secondly, showing battery state of charge at each moment by a state equation and an observation equation; and finally, estimating the battery dump energy by adopting standard sampling point Kalman filtering. The estimation method has the advantages that the method can conveniently carry out quick estimation of battery SOC and has fast convergence speed and high estimation precision; moreover, the method is suitable for quick estimation of SOC of various batteries.

Several attempts have been tried to improve the performance of intra-prediction in video encoding and decoding, which are targeting at pixel level parallelization. However, the prior art methods provide no solution for implementing an improved intra-prediction method on a parallel processing platform. The present invention uses estimated predictors instead of reconstructed exact predictors. This enables faster estimation of predictors, and allows an encoder to perform intra-prediction for all blocks of at least a portion of an image simultaneously. A method for encoding image data, a device for encoding image data, a method for decoding image data and a device for decoding image data are disclosed.

The invention discloses a single image defogging method based on a luminance dark priori method and bilateral filtering. A new image priori method, the luminance dark priori method, is used for estimating the fog concentration and restoring an image, the priori method is based on the statistical law of fog-free image HSI color space luminance components, and according to the statistical law, some pixels exist in local areas of most fog-free images, and the strength value of the luminance components I of the pixels is low and approaches to zero. Based on the priori method, the image is firstly transformed to the HSI color space to obtain the luminance components, a dark priori image is calculated, then atmosphere light and transmissivity are estimated through the luminance dark priori method, the transmissivity is refined through the bilateral filtering, and finally restoration is carried out according to an atmosphere scattering model to obtain the fog-free images. According to the method, the contrast ratio of the image is enhanced obviously, grain details in the images are restored, the visual effect of the image is obviously improved, and the good algorithm performance is achieved.

A novel apparatus and method of extending the frequency tuning range and improving the modulation resolution of an RF digitally controlled oscillator (DCO). In addition to the coarse PVT MIM varactor bank, the DCO uses a single unified bank of varactors that is further subdivided divided into an MSB bank, LSB bank and sigma-delta (SD-LSB) bank. Any ratio mismatches between MSBs and LSBs are digitally calibrated out using a DCO step-size pre-distortion scheme wherein the LSB steps are adjusted to account for the ratio mismatch between the MSB / LSB step sizes. A harmonic characterization technique is used to estimate the mismatches in the minimal size CMOS tuning varactors of a digitally controlled RF oscillator (DCO), wherein the nominal ratio mismatch between the MSB and LSB devices is estimated using hybrid stochastic gradient DCO gain estimation algorithms. The nominal ratio mismatch and the mismatches in the MSB and LSB banks are used to determine the average MSB / LSB mismatch. The average mismatch value is then used to correct the LSB steps.

The invention relates to a real-time prediction method of the remaining lifetime of a lithium ion battery. The method comprises a step of establishing a lithium ion battery capacity degradation model, a step of selecting prior distribution of suitable lithium ion battery capacity degradation model parameters, a step of selecting a likelihood function of the suitable lithium ion battery capacity degradation model parameters, a step of calculating the posterior distribution of the lithium ion battery capacity degradation model parameters based on the Bayesian theory, a step of calculating the prediction distribution of a lithium ion battery capacity, and a step of finally calculating and obtaining the remaining lifetime of a lithium ion battery to be predicted and confidence. The method has the advantages that the prediction of the remaining lifetime of the lithium ion battery has no path dependence, and the method can be used for estimating the remaining lifetime of a lithium ion battery in any degradation path and prediction confidence. The method has the advantages of high prediction accuracy and a fast operation speed, the fast estimation of the remaining lifetime of the lithium ion battery can be realized, and the safe and reliable operation of a vehicle is ensured.

The invention provides an image deblurring method based on camera motion detection. According to the image deblurring method based on the camera motion detection, motion parameters of a camera during exposure are firstly obtained through an inertial navigation device, and a rough movement locus of the camera is estimated according to the motion parameters; then a blurring core of an image during the exposure is obtained through the multi-look geometry according to the movement locus; finally, a sharp image which is deblurred is obtained according to the Wiener filtering algorithm. According to the image deblurring method based on the camera motion detection, the moving condition of the camera during the exposure can be accurately detected, the blurring core can be generated fast and accurately according to the movement locus, and finally the relatively sharp image can be obtained though inverse filtering.

Disclosed is a method of dynamically extracting entropy of battery. At every measurement of a SOC of a battery estimated in a BMS, a temperature of the battery is measured and an OCV of the battery is estimated and then stored. Entropy of the current state of the battery can be obtained through calculation using the temperature value and the OCV value newly stored. SOH and SOC of the battery are updated based on the entropy value newly calculated. The conventional BMS estimates SOH through internal resistance of the battery without using the entropy, but the method allows thermodynamically and analytically understanding the internal state of the battery by using the entropy, and conceiving precisely the battery state by monitoring SOH as well as SOS.

In a vehicle navigation apparatus having a control section which calculates relative vehicle positions and travel direction by dead reckoning calculations based on outputs from on-board sensors and periodically acquires GPS measurement data via a GPS receiver and applies error-reduction filter processing to these data to obtain position and travel direction information for correcting the calculated relative positions, the apparatus has a function for detecting that a travel direction obtained by dead reckoning contains an excessive error, and when that condition is detected, for directly applying an estimated vehicle position and travel direction derived directly from the GPS data, without filter processing, to correct the corresponding relative position and travel direction estimates. Rapid correction can thereby be achieved when the vehicle has been operated in a condition whereby a large amount of error has suddenly arisen in the travel direction that is estimated by the apparatus through dead reckoning calculation, e.g., after the vehicle has been rotated on a turntable with the vehicle navigation apparatus inoperative.

A method for reconstructing gusts and / or structural loads at aircraft, in particular passenger aircraft. The method includes generating an observer on the basis of a nonlinear model of the aircraft which describes the movement of the aircraft in all six degrees of freedom (DoF) and the elastic motion of the aircraft structure; continuously supplying all the data and measurements substantial for the description of the state of the aircraft to the observer; and calculating the gust velocities and structural loads (manoeuvre and gust loads) by the observer from the supplied data and measurements.

It is an object of the present invention to improve the diversity gain by conducting linear prediction of fading fluctuations and switching antennas. In order to attain this object, the diversity receiver in accordance with the present invention comprises a plurality of antennas for receiving wireless signals subjected to direct spread modulation, an antenna switch for conducting antenna connection switching thereof, a primary demodulator for demodulating the wireless signals and obtaining a spread spectrum signal, a matched filter for finding a correlation value of the spread spectrum signal and a spread code for demodulation, a mean value computation unit for finding a mean SNR of the received signal by converting the maximum correlation value to a value per 1 frame, an estimation unit for linear prediction of the SNR of the received signal based on the time series data of the mean SNR, and a level comparator for comparing the SNR of the received signal that was predicted by the estimation unit with a threshold value and outputting a control signal for conducting antenna switching to the antenna switch.