53results about How to "Accurately estimate" patented technology

A method and system for allocating bandwidth in a wireless communications network includes a geo-location tool and an allocation engine. The geo-location tool is operable to receive data for a wireless communications network that includes a plurality of geo-location areas and to estimate bandwidth parameters for a geo-location based on the data. The allocation engine is operable to allocate bandwidth in the geo-location area based on its bandwidth parameters.

The present system and method provides a more precise way to record food and beverage intake than traditional methods. The present disclosure provides custom software for use in mobile computing devices that include a digital camera. Photos captured by mobile digital devices are analyzed with image processing and comparisons to certain databases to allow a user to discretely record foods eaten. Specifically, the user captures images of the meal or snack before and after eating. The foods pictured are identified. Image processing software may identify the food or provide choices for the user. Once a food is identified and volume of the food is estimated, nutrient databases are used for calculating final portion sizes and nutrient totals.

An image capture device according to the present disclosure includes: an image sensor; a lens optical system condensing light onto the image sensor and including a focus lens; a driving section driving one of the image sensor and the focus lens to change a distance between the image sensor and the focus lens; a displacement control section configured to control the displacement of the one being driven according to a predetermined displacement pattern by outputting an instruction to the driving section; and a synchronizing section configured to control the displacement control section by reference to timing of exposure of the image sensor. The displacement range of the image sensor or focus lens includes a first range, a second range separated from the first range, and a third range interposed between the first and second ranges. The predetermined displacement pattern includes first, second and third types of displacement patterns according to which one of the image sensor and the focus lens is displaced at least once in each of the entire first, second and third ranges. And one of the first and second types of displacement patterns and the third type of displacement pattern are repeated alternately.

A system and method are provided for accurately estimating blood oxygen saturation independent of tissue encapsulation of the optical sensor. The method includes determining a tissue overgrowth correction factor that accounts for the optical properties of the tissue that cause scattering of the emitted light to a light detector and the relative amplitudes of the emitted light wavelengths. A corrected time interval measured for infrared light is based on an infrared signal returned from fluid with no tissue overgrowth. A corrected time interval for red light is determined by subtracting a red light signal attributed to the presence of tissue overgrowth. The amount of red light signal attributed to the presence of tissue overgrowth is proportional to the total infrared signal less the nominal infrared signal. Oxygen saturation is estimated based on standard calibration factors and the ratio of the corrected infrared time interval and the corrected red time interval.

A method of estimating a state of charge of a battery, a method of estimating an open circuit voltage of a battery, and a method and device for computing a degradation degree of a battery are provided. As a degradation degree, a ratio of a total electrical quantity chargeable or dischargeable of a battery at any time point to an initial electrical quantity that is a total electrical quantity chargeable or dischargeable of the battery upon non-degradation is computed, and by using the degradation degree, a state of charge or an open circuit voltage of the battery is accurately estimated.

The present invention provides methods of diagnosis and prognosis of human chronic lymphocytic leukemia (CLL) in a subject a patient in need thereof. The methods of the present invention involve measuring the expression profile of two known genes: LPL and ADAM29; and comparing the ratio of their expression to diagnose the presence of CLL or to prognose the likelihood of developing CLL or the symptoms consistent with CLL.

The invention provides a method and apparatus to optimally estimate and adaptively compensate the temperature-induced frequency drift of a crystal oscillator in a navigational signal receiver. A Read-Write memory encodes two tables, one for looking up frequency drift values versus temperature readings and another one for valid data confirmation on the first table. The initially empty look-up table is gradually populated with frequency drift values while the receiver computes the frequency drift along with its position. During initial start of the receiver or re-acquisition of satellite signals, the stored frequency drift value corresponding to the current temperature is used. If no valid frequency drift value is available, the frequency drift value is computed based on the existing frequency drift values in the table. This invention reduces the Time-To-First-Fix (TTFF) of the receiver and enables the receiver to self-calibrate, thus no additional factory calibration would be necessary.

A position of a mobile communication terminal in an environment where the terminal cannot communicate with a GPS is defined more narrowly than a sector area of a base station in which the mobile communication terminal is located so that the position of the mobile communication terminal can be estimated more accurately. Even if a mobile communication terminal is in an environment where the terminal cannot communicate with a GPS, the latitude and longitude of the center of a sector of the wireless base station in which the mobile communication terminal is located is obtained according to a predetermined calculation by a base station database device, and the obtained latitude and longitude is sent back as an estimated latitude and longitude of the mobile communication terminal to the mobile communication terminal via the wireless base station.

A battery status detecting method for detecting a battery status of a secondary battery that supplies power to an electrical load is disclosed. This method includes measuring a discharge current value of the secondary battery, and estimating the dischargeable capacity or the dischargeable time of the secondary battery with the measured discharge current value based on discharge characteristics of the secondary battery indicating the discharge status of the secondary battery when the voltage of the secondary battery drops to a predetermined voltage specified by the electrical load.

A method is presented for determination of single stance or double stance state of leg bodies of a bipedal mobile body (BMB). In a single stance state, a floor reaction force acting on a leg body touching the ground is estimated based on an equation of motion for the center of gravity (GO) of a BMB. In a double stance state, floor reaction forces, Fr and Ff respectively, acting on the leg bodies are estimated based on an equation of motion for GO of a BMB and an expression of relation between components of Fr and Ff on the respective leg bodies and positions of ankle portions of the leg bodies relative to the GO of the BMB. Further, based on an inverse dynamics model, knee and hip joint moments of each leg body are estimated using floor reaction force values.

A vehicle HVAC system as described herein obtains solar intensity data from an onboard solar sensor, along with current vehicle position data from a telematics system or a GPS system. The current vehicle position data is processed to determine the current sun position, which is used to provide a real-time and accurate estimate of the solar intensity in the vehicle interior. Vehicle configuration information, including position data related to light-obstructing features such as pillars, may also influence the solar intensity estimate. The solar intensity estimate can be utilized to control the operation of the vehicle HVAC system.

Systems and methods are provided for maintaining neutrality while trading a list of securities using an algorithmic trading facility coupled with at least one destination. This destination includes at least one alternative trading system (ATS). This facility is coupled, via an electronic data network, to a plurality of trading clients, and configured to receive a trade request to trade a list of securities from a trading client. This request includes user defined trading constraints that are used to generate and transmit trade orders to at least one ATS. The orders are transmitted based on trading data related to the destinations, the trade list, and the trading constraints. The facility can identify each executed trade corresponding to the trade orders and calculate a trade imbalance. The facility can determine whether the trade imbalance exceeds the trading constraints, and reallocate one or more of said submitted orders based on this determination.

A method of automatically assigning class labels to objects is provided. The method uses object data indicative of a plurality of parameters associated with each object. The method comprises (i) identifying, from the object data or from a lower-dimensional encoding of the object data a plurality of cluster centres in a d-dimensional space, each cluster centre corresponding to one of the class labels; (ii) for respective cluster centres, determining a surrounding region based on a nearest neighbour cluster centre, and assigning the respective class label to objects within the surrounding region; (iii) generating a predictive model using the object data, or the lower-dimensional encoding of the object data and the class labels of the assigned objects; and (iv) assigning class labels to unassigned objects using the predictive model. A corresponding system for performing the above method is also provided.

A method for estimating the rotor time constant (τr) of an induction machine when the stator resistance (Rs) and rotor resistance (Rr) of the induction machine are known. The method comprises the steps of feeding a DC current to the stator of the induction machine, injecting a sine-wave current component into the stator of the induction machine, the current having an amplitude (isc) and an angular frequency (ωc), measuring the voltage component (uscd) of the stator voltage of the induction machine in the same direction and with the same angular frequency as the injected current, and calculating the rotor time constant using equation τr=1ωc⁢uscd-Rs⁢isc(Rs+RR)⁢isc-uscd.

Disclosed is a method (400) of tracking a maximum power point (MPP) of a PV (photovoltaic) system (100) comprising a circuit (120) including a controller (124) controlling a DC voltage-DC voltage converter (126) for converting an output current of the photovoltaic system, the controller further comprising a memory, the method comprising measuring (412) a first value of a photovoltaic system voltage at an initial maximum power point; storing said first value in said memory; periodically sampling (406) a power output level of said photovoltaic system, and upon detecting a change in said power output level exceeding a first threshold, reading the first value from the memory; and adjusting (410) a duty cycle of the DC voltage-DC voltage converter until the circuit voltage matches said first value; the method further comprising fine-tuning (414) the duty cycle of the DC voltage-DC voltage converter to a further maximum power point following detecting a change in said power output level exceeding a first threshold. Such a method is capable of extracting the maximum power out of a PV system. A PV system controller implementing this method and a PV system including such a controller are also disclosed.

In charge rate estimating apparatus and method for a secondary cell, a current flowing through the secondary cell is measured, a voltage across terminals of the secondary cell is measured, an adaptive digital filtering is carried out using a cell model in a continuous time series shown in an equation (1), all of parameters at one time are estimated, the parameters corresponding to an open-circuit voltage which is an offset term of the equation (1) and coefficients of A(s), B(s), and C(s) which are transient terms, and, the charge rate is estimated from a relationship between a previously derived open-circuit voltage V0 and the charge rate SOC using the open-circuit voltage V0,V=B⁡(s)A⁡(s)·I+1C⁡(s)·V0,(1)wherein s denotes a Laplace transform operator, A(s), B(s), and C(s) denote poly-nominal functions of s.

The invention relates to streaming algorithms useful for obtaining summaries over unaggregated packet streams and for providing unbiased estimators for characteristics, such as, the amount of traffic that belongs to a specified subpopulation of flows. Packets are sampled from a packet stream and aggregated into flows and counted by implementation of: (a) Adaptive Sampled NetFlow (ANF), and adjusted weight (AA<sup2>NF< / sup2>) of a flow (f) is calculated as follows: AA<sup2>NF< / sup2>(f)=i(f) / p′; i(f) being the number of packets counted for a flow f, and p′ being the sampling rate at end of a measurement period; or (b) Adaptive Sample-and-Hold (ASH), and adjusted weight (AA<sup2>SH< / sup2>) of a flow (f) is calculated as follows: AA<sup2>SH< / sup2>(f)=i(f)+(1−p′) / p′; i(f) being the number of packets counted for a flow f, and p′ being the sampling rate at end of a measurement period.

Provided are a method and device for estimating a channel in a wireless communication system, and more particularly, a method of estimating a channel of an uplink signal in an orthogonal frequency division multiplexing (OFDM) / orthogonal frequency division multiple access (OFDMA) communication system supporting the Institute of Electrical and Electronics Engineers (IEEE) 802.16d / e standards and a channel estimation device employing the method. The method includes the steps of: extracting pilot symbols included in the received signal and estimating linear phase values using the pilot symbols; interpolating the pilot symbols along a time axis and obtaining first channel responses; interpolating the pilot symbols along a frequency axis according to the first channel responses and obtaining second channel responses; and calculating channel estimation values using the second channel responses and the linear phase values.

A digital data processing method for information retrieval and an information retrieval system thereof are provided. In an embodiment, the information retrieval system trains a personalized model according to a user's feedback perceptions of at least one information piece. With respect to information pieces and different users, the information retrieval system performs estimation, based on two different stages with a generalized model and the trained personalized model.

Implemented are an apparatus and a method that enable highly accurate intent estimation of a user utterance. An utterance learning adaptive processing unit analyzes a plurality of user utterances input from a user, generates learning data in which entity information included in a user utterance with an unclear intent is associated with a correct intent, and stores the generated learning data is a storage unit. The utterance learning adaptive processing unit generates learning data in which an intent, acquired from a response utterance from the user to an apparatus utterance after input of a first user utterance with an unclear intent, is recorded in association with entity information included in the first user utterance. The learning data is recorded to include superordinate semantic concept information of the entity information. At the time of estimating an intent for a new user utterance, learning data with similar superordinate semantic concept information is used.

A method of estimating an amount of undesired loading experienced by at least a portion of a structure (100) is provided. The structure (100) may be, for example, a wind turbine generator (WTG) and the portion for which undesired loading is estimated may be, for example, a rotor (130) of the WTG. The method includes receiving a first signal characterizing instantaneous stress experienced by a component (140) of the structure (100) and filtering out at least a portion of the received first signal that corresponds to the desired loading experienced by the component to produce a first filtered signal. The amount of undesired loading experienced by the at least a portion of the structure (100) is estimated based at least partially on the first filtered signal.

A control device of an internal combustion engine calculates ignition delays in lean combustion and rich combustion, standardizes the ignition delays based on ignition timing, and further standardizes the ignition delays based on injection quantity and injection timing of pilot injection respectively. The control device calculates a present ignition delay by linear interpolation of the standardized ignition delays in the lean combustion and the rich combustion. Moreover, the control device corrects the present ignition delay with the ignition timing and further corrects the present ignition delay with the injection quantity and the injection timing of the pilot injection. The control device calculates a command value of the injection timing by subtracting the corrected present ignition delay from target ignition timing.

A method and system for determining a location of at least one stationary node of a wireless network, which includes providing a predetermined path within a geographic space of the wireless network, prior to localization, moving a mobile node along the predetermined path, measuring a network parameter with respect to the mobile node as it moves along the predetermined path, and performing a localization scheme to estimate the location of the at least one stationary node using the measured network parameter.

The present invention provides a device and method for estimating a travel direction of a moving body, the device and method allowing highly accurate estimation of the travel direction even in the case where the positional relationship between the moving body and the self-contained sensing device or the posture is changed freely.The travel direction estimating device includes (i) a gravitational direction vector estimating section 2407 for estimating a gravitational direction vector on the basis of respective outputs of an acceleration sensor and an angular velocity sensor, (ii) a tentative travel direction vector generating section 2413 as a candidate of travel direction vector, (iii) a walk frequency estimating section 2424 for estimating a walk frequency from component data resulting from projecting acceleration component data for the gravitational direction vector, and (iv) a travel direction vector determining section 2425 for determining an objective function and a phase difference on the basis of a frequency component of a component Af resulting from projecting the acceleration component data for a travel direction vector, a frequency component of a component An resulting from projecting the acceleration component data for a side-to-side direction vector, a frequency component of a component Ws resulting from projecting angular velocity component data for the travel direction vector, a frequency component of a component Wn resulting from projecting the angular velocity component data for the side-to-side direction vector, a walk frequency, and the phase of the walk frequency, selecting as travel direction vectors, tentative travel direction vectors with which the phase difference is within a predetermined range and each of which maximizes the value of the objective function, and determining the side of the travel direction.

An object of the present invention is to provide a heating process apparatus capable of being controlled to a constant temperature and to temperatures in a high-temperature range higher than or equal to a 1850 degrees. A heating process apparatus includes: a process chamber; a heat-processed object support member provided in the process chamber; a heater provided inside the heat-processed object support member; and temperature measuring means for measuring the temperature of the heat-processed object support member; wherein the temperature measuring means is provided outside a transmissive window provided in a peripheral wall of the process chamber and through which infrared energy radiated from the heat-processed object support member can be transmitted; and the temperature measuring means comprises a collector collecting infrared energy radiated from the heat-processed object support member and a calculating unit calculating temperature based on the ratio between the intensities of two wavelengths in the infrared.

A charging control method and a charging mechanism for a lithium ion secondary battery are provided that can determine the life of the lithium ion secondary battery with more accuracy and a simple configuration. A charging control method for a lithium ion secondary battery calculates an integrated value of the number of charged times. The method includes: adding a predetermined value to the integrated value of the number of charged times of the lithium ion secondary battery if both a residual voltage that is a voltage value of the lithium ion secondary battery before the beginning of charging and an elapsed time from the time of the previous charging of the lithium ion secondary battery are not less than predetermined values; and estimating the life of the lithium ion secondary battery based on the integrated value of the number of charged times.