46results about How to "Estimates are accurate and reliable" patented technology

The invention discloses an online lithium ion battery SOC estimation method based on extended Kalman filter, belongs to the technical field of SOC prediction of a lithium ion battery, and aims to solve the problem that the reliability of the online estimation of a conventional lithium ion battery SOC is low due to influence of initial value selection. The method comprises the steps as follows: a voltage and current relation of a first-order RC (resistance / capacitance) equivalent circuit of a detected lithium ion battery and a voltage and current relation of a second-order RC equivalent circuit are established firstly; a charge-discharge experiment is performed on the detected lithium ion battery to establish a polynomial fitting function of a Kalman filter initial value SOC 0 of the detected lithium ion battery; a covariance P (0) of the Kalman filter initial value SOC 0 and a Kalman filter initial error of the detected lithium ion battery is obtained; and then, battery SOC estimation based on extended Kalman filter is performed, so that the online estimation of the lithium ion battery SOC is realized. The method is used for online estimation of the lithium ion battery SOC.

An object of the present invention is to provide an ultrasonic urinary volume sensor capable of estimating a urinary volume in the bladder accurately corresponding to any particular individuals and / or conditions thereof by incorporating a space time series processing method allowing for an accurate estimation of the urinary volume in the bladder in association with the particular individuals and / or conditions thereof. An ultrasonic urinary volume sensor of the present invention comprises: a probe 1 having a plurality of ultrasonic oscillators 3 for oscillating ultrasonic waves toward a wall surface of the bladder, which is adhesively placed over a body surface in an abdominal section via an ultrasonic wave transmission medium interposed therebetween; and a processing section 2 for detecting and processing reflective echoes of the ultrasonic waves from the wall surface of the bladder, which have been oscillated by the plurality of ultrasonic oscillators 3 of the probe 1, wherein the plurality of ultrasonic oscillators 3 is disposed along a direction of expansion of the bladder.

The present invention relates to determination of a terrain parameter relative to a vehicle (100) by registering a first image from the vehicle (100) when it is located at a first point in space (O1). The first image includes a primary representation of a first terrain point (P1) and a primary representation of a second terrain point (P2). Then, a second image is registered from the vehicle (100) when it is located at a second point in space (O2). This second image includes secondary representations of the first and secondary terrain points (P1) and (P2) respectively. Moreover, vehicle movement data is received, which describes at least one of a translation ({overscore (R)}) between the first and second points in space (O1; O2), and a rotation ({overscore (A)}) between the first and second points in space (O1; O2). A first image velocity vector is determined, which describes a movement of the primary representation of the first terrain point (P1) in the first image to the secondary representation thereof in the second image. Correspondingly, a second image velocity vector is determined, which describes a movement of the primary representation of the second terrain point (P2) in the first image to the secondary representation thereof in the second image. A terrain vector ({overscore (Ξ)}) is then resolved, based on the first and second images, a camera model describing a geometric relationship between a particular terrain point and its projected representation onto an image plane, and a respective relationship expressing each of the first and second image velocity vectors as a function of the translation ({overscore (R)}) and the rotation ({overscore (A)}). The terrain vector ({overscore (Ξ)}) extends between one of the first and second points in space (O1; O2) and a particular terrain point (T) in proximity of the vehicle (100). Thus, based on the terrain vector ({overscore (Ξ)}), for instance an altitude (ZO1) of the vehicle (100) may be determined.

The invention relates to a multi-information fusion vehicle side slip angle estimation method. The method comprises the following steps that (1) a kinematics estimation method is adopted to estimate to obtain a kinematics side slip angle measuring estimation value beta <kin>; (2) a linear two-degree-of-freedom monorail vehicle model is adopted to establish a dragonberg observer based on the kinematics, and the observer is adopted to estimate to obtain the kinematics side slip angle measuring estimation value beta <model>; and (3) the kinematics side slip angle measuring estimation value beta is obtained by fusing beta<kin> and beta<model> according to a formula (please see the specifications for the formula), wherein Tau is filter constant, and s is laplacian. Compared with the prior art, the multi-information fusion vehicle side slip angle estimation method has the advantages of high estimation accuracy, good rubustness, wide application and the like.

The invention relates to a dry land farmland water potential soft measuring method based on microenvironment information and a soft measuring network. The method comprises the following steps of: selecting and determining auxiliary variable of farmland water potential soft measurement; setting a corresponding sensor according to the auxiliary variable; processing the collected data and generating input data; constructing a farmland water potential soft measurement model, training and checking the soft measurement model by using the sample data obtained in a test; and sending the preprocessed data to the farmland water potential soft measurement model to obtain the farmland water potential estimation value. The soft measuring network comprises a plurality of subnetworks and an accurate irrigation decision centre which performs data communication with the plurality of subnetworks through GSM (Global System for Mobile Communications) / GPRS (General Packet Radio Service), wherein the subnetwork consists of a farmland water potential soft measurement station and a plurality of network nodes. The invention can realize automatic and continuous monitoring of the farmland water potential, timely and accurately reflect the moisture stress state in the growing process of dry crops and realize automatic and continuous monitoring of parameters of various agricultural microclimates.

The invention provides a detection method of indomethacin. The detection method comprises the following steps: producing and providing indomethacin tablets with different mass gradients; under the same pre-set condition, obtaining characteristic absorption peaks of the indomethacin tablets to terahertz wave radiation under the different mass gradients; radiating a sample to be detected by adoptingterahertz waves and obtaining the characteristic absorption peak of the sample to be detected to the terahertz wave radiation; judging whether the characteristic absorption peak of the sample to be detected to the terahertz wave radiation and the characteristic absorption peaks of the indomethacin tablets to the terahertz wave radiation under the different mass gradients are similar or not underpre-set conditions; if so, judging that the sample to be detected contains the indomethacin. According to the detection method provided by the invention, a manner of radiating the indomethacin tabletsby utilizing terahertz waves is utilized so that the problems of a traditional method of sample damages, high danger and high cost are overcome; the sample is produced by adopting a tabletting methodso that the speed is more rapid when a terahertz detection technology is used for detecting in the future and an obtained result is more accurate and reliable.

A wireless power transmitter (101) comprises a driver (201) generating a drive signal for a transmitter coil (103) thereby generating a power transfer signal during power transfer intervals of a repeating time frame comprising at least one power transfer interval and one foreign object detection interval. A test generator (211) generates a test drive signal for a test coil (209) thereby generating an electromagnetic test signal during foreign object 5 detection intervals. A foreign object detector (207) performs a foreign object detection test in response to a measured parameter for the test drive signal during the foreign object detection intervals. An adapter (213) generates a varying test drive signal for the test coil (209) during an adaptation interval, and determines a test drive signal parameter value in response to the varying test drive signal. The test generator (211) sets a signal property of the test drive 10 signal during at least one foreign object detection interval in response to the test drive signal parameter value.

Method and system for monitoring stress level of a subject. Beat-to-beat time variation and stroke volume variation of the heart a subject are obtained simultaneously, and a stress level indication is determined as a function of the beat-to-beat time variation and the relative stroke volume variation. More accurate and reliable estimates for stress level may be obtained.

A method and a system for determining a terrain parameter relative to a vehicle (100) by registering a first image from the vehicle located at a first point in space, then registering a second image from the vehicle (100) when it is located at a second point in space (O2) . Receiving vehicle movement data which describes at least one of a translation (R) between the first and second points in space (O1; O2), and a rotation (A) between the first and second points in space (O1; O2). A first image velocity vector is determined, which describes a movement of the primary representation of the first terrain point (P1) in the first image to the secondary representation thereof in the second image. A second image velocity vector is determined, which describes a movement of the primary representation of the second terrain point (P2) in the first image to the secondary representation thereof in the second image. A terrain vector is then resolved from a respective relationship expressing each of the first and second image velocity vectors as a function of the translation and the rotation, the terrain vector extending between one of the first and second points in space (O1; O2) and a particular terrain point (T) in proximity of the vehicle (100).

The present invention provides an estimation method of the rotor temperature of an electric motor. The estimation method comprises a step of calculating the rotor loss and the stator winding loss of the electric motor through a rotor loss model and a stator winding loss model according to an electric motor operation state parameter, and a step of estimating the rotor temperature of the electric motor through a thermal model according to the rotor loss and the stator winding loss of the electric motor and a stator iron core temperature. According to the method, through establishing the thermal model among a stator iron core, a stator winding and a rotor, the estimation result of the estimation method is more accurate and reliable and is not influenced by the accident of the motor, and the performance is more stable.

A method and a device for estimating the instantaneous mass of a rotary wing aircraft, the aircraft having a power plant driving at least one main rotor and an anti-torque rotor in rotation, and also having a plurality of sensors. The method uses functional characteristics and flight characteristics of the aircraft, atmospheric characteristics, and performance curves for the aircraft to determine the measured instantaneous mass Mm of the aircraft. Furthermore, the method makes it possible to consolidate the measured instantaneous mass Mm of the aircraft by comparing it in arithmetical or statistical manner during a flight of the aircraft with a calculated instantaneous mass Mc determined from the variation in the quantity of fuel present in the aircraft.

The invention relates to digital signal transmission method and system based on a multi-carrier pseudorandom sequence. The method comprises the steps of: carrying out coding and modulation treatment on data to be transmitted to generate a data block to be transmitted; carrying out framing on the data block to be transmitted and a selected multi-carrier pseudorandom sequence to obtain a data frameto be transmitted; and carrying out digital-to-analogue conversion and RF (Radio Frequency) modulation treatment on the data frame to be transmitted and sending. The method and system can obtain the needed multi-carrier pseudorandom sequence used as data assistance with the least time and provides more accurate and reliable parameter estimation for digital signal transmission.

The invention discloses a combined Doppler estimation method suitable for an underwater acoustic communication system. The method comprises the steps of S1, performing carrier capture and coarse synchronization by adding a start frame of an LFM+CW signal; and S2, performing fine synchronization by determining a peak value offset of an LFM signal. The step S1 includes the steps: after a first LFM signal is identified by an LFM pulse compression peak value obtained by the matched filtering, the single carrier is captured and coarsely synchronized by a COSTAS ring to obtain an initial Doppler estimation result, and the sampling rate is adjusted for the first time. Compared with the prior art, the method of the invention has the advantages of accurate and reliable estimation results, small calculation amount, simple realization, strong real-time performance, easy realization and so forth.

A method and an apparatus for measuring dry mass flow rate for a biological material.—The method steps include conveying the biological material through a measuring station, scanning the biological material with electromagnetic radiation of at least two different energy levels, determining the amount of radiation transmitted through the biological material at said two energy levels, and summing, for each of sad two energy levels, the radiation transmission values over a time frame to summed radiation transmission values. Further, a wet dry mass flow rate is estimated based on the summed radiation transmission values for said two energy level. The moisture content of the biological material is estimated based on the amounts of radiation transmitted through the biological material. The estimated wet dry mass flow rate is scaled in accordance with the estimated moisture content of the biological material, thereby providing an estimate of the dry mass flow rate.

The invention discloses a bared oil-gas pipeline minimum pipe wall temperature measuring method. The measuring method comprises the following steps: the first step in which the total heat transfer coefficient K by taking the area of the outer surface of the pipeline as the reference is calculated; the second step in which the medium temperature t2 at the tail end of the pipeline is calculated, the environment temperature te of the region at which the tail end of the pipeline is located is measured, and the environment temperature te of the region at which the tail end of the pipeline is located is subtracted from the medium temperature t2 at the tail end of the pipeline to obtain the temperature difference delta t at the tail end of the pipeline; and the third step in which the minimum wall temperature tmin at the tail end of the pipeline is calculated through the formula described in the description. According to the technical scheme of the invention, six principal factors influencing the bared steel tube minimum wall temperature in the low-temperature environment, including the environment temperature, the medium temperature, the environment wind speed, the conveying flow, the pipeline specification and the pipeline length are taken into account comprehensively, the estimation result of the minimum wall temperature is accurate and reliable, less difference exists between the estimation result and the wall temperature that measured practically, the accuracy of the method is higher than the accuracy of other engineering estimation methods, the accuracy of the method is equivalent to the accuracy of the numerical calculation method, and the method is simpler and more convenient than the numerical calculation method.

A reader device (110) for reading information transmitted from a transponder (130) via a backscatter signal (132) generated by the transponder (130) in response to a stimulus signal (112) generated by the reader device (110), the reader device (110) comprising a first power estimation unit (114) adapted for estimating a first power value indicative of the power of the stimulus signal (112) at a position of the transponder (130) by evaluating a power information included in the backscatter signal (132), a second power estimation unit (116) adapted for estimating a second power value indicative of the power of the backscatter signal (132) at a position of the reader device (110), and a distance estimation unit (118) adapted for estimating a distance (d1) between the reader device (110) and the transponder (130) based on the first power value and the second power value.

In order to realize a true and natural color mapping result, the invention provides a color mapping method which comprises a step of obtaining the brightness value of each pixel of a first area and a second area according to a preset brightness calculation mode, a step of sorting the pixels of the first area according to the brightness value of each pixel of the first area to obtain a first sequence and sorting the pixels of the second area according to the brightness value of each pixel of the second area to obtain a second sequence, a step of obtaining the position data Ii of a pixel I of the second area in the second sequence, using Ii to read a corresponding pixel i' in the first sequence and mapping the color value of the corresponding pixel i' to the pixel i. The invention also provides a device for realizing the method, the mapping actual effect generated by the scheme is equivalent of the effect of maintaining a constant light condition, the color of a target area is mapped to a source area on the above basis, an obtained result is real and natural, and an estimated effect which is in accordance with the reality can be obtained.

The invention relates to the technical field of ship design, in particular to a rapid estimation method of an inherent rolling moving period of a conventional ship. The method comprises the following steps: acquiring the following data of B, D, KG and GM0, and then rapidly estimating the inherent rolling moving period T theta of the ship according to a formula shown in the description. The method disclosed by the invention is concise, easy to understand, and accurate and reliable in estimated results. The method overcomes the defects that a conventional estimation method of an inherent rolling period of a conventional ship is inaccurate in estimated results and large in deviation.

The invention discloses a combined Doppler estimation method based on dynamic adjustment of a sampling rate. The combined Doppler estimation method comprises the steps of S1, adding a starting frame of an LFM+CW signal to carry out carrier capture and coarse synchronization; and S2, carrying out fine synchronization by measuring the peak value offset of the LFM signal. The step S1 comprises the steps of after a first LFM signal is identified by an LFM pulse compression peak value obtained by matched filtering, achieving capture and coarse synchronization of a single carrier through a COSTAS ring to obtain an initial Doppler estimation result, and adjusting the sampling rate for the first time. Compared with the prior art, the method has the advantages of being accurate and reliable in estimation result, small in calculation amount, easy to implement, high in real-time performance, easy to implement and the like.

A method for estimation of a vehicle tire force includes: receiving, by a controller of a vehicle, a measured vehicle acceleration of the vehicle; receiving, by the controller, a measured wheel speed and a measured yaw rate of the vehicle; forming, by the controller, inertia matrices based on an inertia of rotating components of the vehicle; calculating torques at corners of the vehicle using the inertia matrices; estimating tire forces of the vehicle based on the measured vehicle acceleration, the measured wheel speed, and the inertia matrices; and controlling, by the controller, the vehicle, based on the plurality of estimated longitudinal and lateral tire forces.

The invention belongs to the technical field of new energy automobiles, and particularly relates to an SOC estimation method of a dynamic correction ampere-hour integral method. Calculating the current battery SOC through an ampere-hour integral method, substituting the value into a battery second-order RC equivalent model to calculate the current battery end voltage (U estimation), carrying out difference calculation on the current battery end voltage (U real) and a real sampling end voltage value (U real), and if the difference is greater than a voltage sampling error (zeta u error), continuously correcting the sampling current value to correct the SOC value; otherwise, directly outputting the SOC value; compared with a traditional ampere-hour integral method for estimating the SOC, the method considers factors such as current sampling precision, battery internal resistance, temperature and aging, and SOC estimation is more accurate and reliable.

The systems and methods described herein enable reliable estimation of cardiovascular indices on real-time, non-invasive or minimally-invasive, and beat-to-beat basis. Cardiovascular indices which can be estimated include: stroke volume (SV), which being limited to, cardiac output (CO) and total peripheral resistance (TPR). In various embodiments, one or more of these indices are estimated continuously, on a beat-to-beat basis, using peripheral arterial blood pressure (ABP) waveforms and certain parameters derived from the peripheral ABP waveforms. The derived parameters are substantially insensitive to distortions of the ABP waveform arising from tapered arterial branches throughout the arterial tree. The methods describe herein can provide a more accurate and reliable estimate of hemodynamic parameters than existing techniques.

The invention relates to a dry land farmland water potential soft measuring method based on microenvironment information and a soft measuring network. The method comprises the following steps of: selecting and determining auxiliary variable of farmland water potential soft measurement; setting a corresponding sensor according to the auxiliary variable; processing the collected data and generatinginput data; constructing a farmland water potential soft measurement model, training and checking the soft measurement model by using the sample data obtained in a test; and sending the preprocessed data to the farmland water potential soft measurement model to obtain the farmland water potential estimation value. The soft measuring network comprises a plurality of subnetworks and an accurate irrigation decision centre which performs data communication with the plurality of subnetworks through GSM (Global System for Mobile Communications) / GPRS (General Packet Radio Service), wherein the subnetwork consists of a farmland water potential soft measurement station and a plurality of network nodes. The invention can realize automatic and continuous monitoring of the farmland water potential, timely and accurately reflect the moisture stress state in the growing process of dry crops and realize automatic and continuous monitoring of parameters of various agricultural microclimates.

The invention relates to the technical field of environmental engineering, and particularly relates to a model of the CO2 release amount. According to the model of the CO2 release amount in sewage treatment, released CO2 includes CO2 released when organic pollutants are degraded by aerobic microorganisms in an aeration tank in the sewage treatment process, and also includes CO2 released by a biochemical action and a non-biochemical action of each treatment step in the sewage treatment process. Because of adopting of the technical scheme, the model can accurately grasp the CO2 release amount of all steps in the sewage treatment, so that estimation of CO2 released by the sewage treatment is more accurate and reliable, and a scientific basis is provided for implementation of CO2 emission reduction and development and utilization in the sewage treatment.

The invention relates to a method for determining an antagonistic activity of the lipopeptid antibiotic, fengycin, against fusarium, in particular to a method for determining an antagonistic activity of fengycin lipopeptide against pigment-producing fusarium. The method is realized by replacing an inhibition zone with a pigment ring as a determining standard, operating the plate bacteriostasis experiment (cylinder plate method, drilling method or filtering paper method), and adopting temperature segmentation method to culture indicator bacterium. The invention has the advantages of high efficiency, simple operation, and reliable result, solving the difficulty in determining the antagonistic activity of the antibiotic against fusarium.

A method for estimation of a vehicle tire force includes: receiving, by a controller of a vehicle, a measured vehicle acceleration of the vehicle; receiving, by the controller, a measured wheel speed and a measured yaw rate of the vehicle; forming, by the controller, inertia matrices based on an inertia of rotating components of the vehicle; calculating torques at corners of the vehicle using the inertia matrices; estimating tire forces of the vehicle based on the measured vehicle acceleration, the measured wheel speed, and the inertia matrices; and controlling, by the controller, the vehicle, based on the plurality of estimated longitudinal and lateral tire forces.

A method and an apparatus for measuring dry mass flow rate for a biological material. The method steps include conveying the biological material through a measuring station, scanning the biological material with electromagnetic radiation of at least two different energy levels, determining the amount of radiation transmitted through the biological material at said two energy levels, and summing, for each of sad two energy levels, the radiation transmission values over a time frame to summed radiation transmission values. Further, a wet dry mass flow rate is estimated based on the summed radiation transmission values for said two energy level. The moisture content of the biological material is estimated based on the amounts of radiation transmitted through the biological material. The estimated wet dry mass flow rate is scaled in accordance with the estimated moisture content of the biological material, thereby providing an estimate of the dry mass flow rate.

The present disclosure provides methods for estimating cancer susceptibility, risk of developing multiple tumor sites, and the aggressiveness of prostate cancer. Disclosed are interactions among three polymorphisms: the Acid Phosphatase Locus-1 (ACP1) 228C>T (rs11553742) and 413A>G (Q106R, rs79716074) single nucleotide polymorphisms (SNPs), and a SNP for the Astrocyte Elevated Gene-1 (AEG1) (rs2438211). Additionally interactions among these polymorphisms are disclosed to modify the underlying quantitative expression of major cancer-related genes, indicating that optimization of these gene products by pharmacologic or gene therapy interventions would be beneficial as a cancer therapy to reduce the risk of tumor metastasis, and would also be beneficial in preventing cancer.