71results about How to "Accurately approximated" patented technology

A method of localizing a device, medical or otherwise, within a three dimensional environment, the method comprising: (a) transmitting time varying magnetic fields from at least three transmitters, (b) receiving the transmitted electromagnetic radiation as induced voltage signals from at least one receiver mounted on or within said device, and (c) a processing scheme for processing said received voltage signals in order to extract position and orientation localization information for said device, said processing scheme including correction for conducting materials in the vicinity by the use of information gathered from at least three distinct transmission frequencies for each of said transmitters.

A multi-class connection admission control (CAC) method that supports cell loss and delay requirements. In this model-based CAC, the source traffic is described in terms of the usage parameter control (UPC) parameters. Through analysis and approximations, simple closed-form methods to calculate the bandwidth required to meet guarantees on quality of service (QoS) are used. In addition to being robust, the CAC achieves a high level of resource utilization and can be easily implemented for real-time admission control.

One embodiment includes a surgical wound closure device comprising a substrate having a proximal surface and a distal surface; a drape having a proximal surface and a distal surface, and being disposed proximally to said substrate; and an adhesive layer having a proximal surface and a distal surface; said drape being disposed releasably adherently to said distal surface of said adhesive layer. Another embodiment includes a surgical procedure comprising the steps of providing a surgical wound closure device comprising a substrate having a proximal surface and a distal surface, a drape having a proximal surface and a distal surface and being disposed proximally to said substrate, and an adhesive layer having a proximal surface and a distal surface, where said drape being disposed releasably adherently to said distal surface of said adhesive layer; positioning the proximal surface of said adhesive layer on the skin of a patient; separating said substrate from said drape and adhesive layer to expose said distal surface of said drape; making a surgical incision through said drape; performing a surgical procedure; removing said drape from said adhesive layer to expose said distal surface of said adhesive layer; aligning said substrate and said adhesive layer; and adhering said proximal surface of said substrate to said distal surface of said adhesive layer.

A thermometer for determining body temperature at a first body site, such as the mouth or rectum, has an infrared sensor located in a probe for viewing and detecting heat radiated from a second body site such as the forehead. Ambient temperature is measured concurrently. The measured second site temperature is used as a reference base, and the sensed operating ambient temperature is used as an index so as to calculate a corresponding temperature of the first body site. A final temperature reading display is read from a lookup table containing three groups of data derived from a comprehensive clinical test done previously with a substantial number of measuring targets. The data groups include a second body site temperature database, an operating ambient temperature database, and a first body site temperature database.

The invention relates to a transmitter comprising: means for generating an intermediate frequency signal, means for predistortion of the intermediate frequency signal using a predistortion parameter, means for generating a radio frequency signal from the predistorted intermediate frequency signal, means for determining an image-to-signal-ratio of the radio frequency signal, means for adaptation of the predistortion parameter for reduction of the image-to-signal-ratio.

Assemblies, systems, and methods which prolong relay life by dynamically compensating the make and break contact timing between the contact points of the relay and a zero crossing point of the power supply's waveform are provided according to the present disclosure. The life cycle of the relay components are dramatically increased through the use of these assemblies, systems, and methods due to a decrease in arcing and other physically damaging phenomena between the contacts of the relay. The present disclosure also provides for assemblies, systems, and methods whereby a processor analyzes the inductive kickback effect in the relay load voltage signal and dynamically adjust the relay open time such that the inductive kickback effect is minimized. In exemplary embodiments, the systems / methods provided herein advantageously adjust the relay open time such that the relay switching time corresponds with current zero cross and do so without requiring complicated current monitoring components.

A method is disclosed for generating an orthorectified tile. In at least one embodiment, the method includes retrieving source images obtained by way of a terrestrial based camera; retrieving position data associated with the source images; retrieving orientation data associated with the source images; and converting source image by means of corresponding position data and orientation data to obtain the orthorectified tile. Orthorectified tiles are used to generate an orthorectified mosaic. As such, images recorded by terrestrial based camera may be used to generate a map of a road surface with corresponding road signs.

A method and apparatus for measuring bandwidth of light emitted from a laser which may comprise: first and second wavelength sensitive optical bandwidth detectors providing, respectively, an output representative of a first parameter indicative of the bandwidth of the emitted light as measured respectively by the first and second bandwidth detectors, and an actual bandwidth calculation apparatus adapted to utilize these two outputs as part of a multivariable linear equation employing predetermined calibration variables specific to either the first or the second bandwidth detector, to calculate a first actual bandwidth parameter or a second actual bandwidth parameter. The first actual bandwidth parameter may be a spectrum full width at some percent of the maximum (“FWXM”), and the second actual bandwidth parameter may be a portion containing some percentage of the energy (“EX”). The first and second bandwidth detectors may an etalon and the outputs may be representative of a fringe width of a fringe of an optical output of the respective etalon at FWXM. The precomputed calibration variables may be derived from respective three dimensional plots representing, respectively, detector outputs in relation to a calibrating input light with known values of the first and second actual bandwidth parameters.

A low overhead controller for microstepping a stepper motor and a low overhead method for microstepping a stepper motor. The reduction in overhead in system processor is accomplished by the control circuit which dynamically interpolates motor positions between steps commanded from the processor. Also, the reduction in overhead is accomplished by a microstepping method used to effect microstepping resolution control by employing a stored look-up table which gives a resolution value at a given speed according to a predetermined function.

A unified digital media player control apparatus automatically reproduces (i.e., renders) gapless transitions, as suitably adjoined or concurrently-overlapping events, between a discrete first media file (e.g., sound recording) and a discrete second media file. One embodiment is implemented on a computing device with a graphical user interface and access to a library of digital media files. Logic can distinguish between the production sound design of recordings which have a desirable “creative content” duration (i.e., interval) that will resolve either abruptly or with a gradual fade. Responsive to media file content assessments, and without operator actions or media file preparation, the invention can use at least one programmatically-addressable event timer object to robotically assign discrete player reproduction timing instructions enabled to cause the system's associated media player objects to consistently interoperate with natural, optimally-timed transitions.

A system and method for trialing a modular hip replacement system (10) permits evaluation and replication of the anatomic anteversion rotational angle of the femur. A distal stem component (18) of the hip replacement system (10) includes a proximal portion (34) having a locator feature (35) that is externally accessible when the stem component is mounted within the femur. A proximal trial body assembly (60) is mounted on the proximal portion (34) of the distal stem component (18) to permit rotation of a trial neck component (62). The trial neck component (62) also includes a locator feature (126) that can be externally referenced to determine the anteversion angle.

A method for providing satellite orbit ephemeris includes: determining a positioning satellite in view of a reference position; and providing to a positioning device a satellite orbit ephemeris of the positioning satellite in view of the reference position, the satellite orbit ephemeris being valid for at least one day.

This invention relates to a method and system for fast retrieval of the sequence components from phase, frequency and amplitude varying signals and synchronization therewith, and the concept of a system on a chip for power signal processing. More specifically, it relates to a method and system where the sequence components of a three-phase power signal are extracted and filtered in real time using a multirate phase-locked loop and a dual infinite impulse response filter with fault detection and reinitialization.

Systems, computer implemented methods, and program products to determine approximate static well pressures for one or more arbitrary shaped wells by estimating the drainage volume of the one or more wells, are provided. The drainage volume of the one or more wells, for example, can be estimated from the one or more computed fluid flow flux vectors, and the approximate static well pressures for the one or more wells can be subsequently calculated by taking the pore volume average of the dynamic grid block pressures within the drainage volume of the one or more wells. The one or more fluid flow flux vectors can be calculated at each iteration in a numerical reservoir simulator as a part of standard simulator computations, negating a need for additional, extraneous computations to calculate effective drainage volume of the one or more wells.

Disclosed is a method for approximating the final reading position in an electronic document such as an e-book. The final reading position is approximated by first establishing a reading speed of the reader of the e-book, which reading speed is used to approximate the final reading position on the most recently displayed page of the e-book, for instance by measuring how long the page has been displayed for and using the reading speed and this time period to obtain an approximate final reading position on the most recently displayed page. A computer program product containing this method and a system for executing this method are also disclosed.

Assemblies, systems, and methods which prolong relay life by dynamically compensating the make and break contact timing between the contact points of the relay and a zero crossing point of the power supply's waveform are provided according to the present disclosure. The life cycle of the relay components are dramatically increased through the use of these assemblies, systems, and methods due to a decrease in arcing and other physically damaging phenomena between the contacts of the relay. The present disclosure also provides for assemblies, systems, and methods whereby a processor analyzes the inductive kickback effect in the relay load voltage signal and dynamically adjust the relay open time such that the inductive kickback effect is minimized. In exemplary embodiments, the systems / methods provided herein advantageously adjust the relay open time such that the relay switching time corresponds with current zero cross and do so without requiring complicated current monitoring components.

Methods are described for optimizing wireless networks in a predictable way, i.e., the performance optimized is achievable in a real network. The methods consist of two main components: (i) a novel model that captures the relationship between network topology, wireless interference, traffic demand, and MAC-induced dependencies to accurately predict the throughput of individual flows in the wireless network, and (ii) a model-driven optimization that uses this model to optimize the network for a given performance objective.

Pedaling torque sensor device for bicycles comprising a crank arm (1) performed in a single-piece element having a cross section closed and symmetrical about a plane of symmetry (10) and also symmetric about the plane which is orthogonal to said plane (10) containing the main longitudinal axis of the crank arm (7). Said crank arm (1) is provided with at least one couple of straight drilled blind holes (5, 6) respectively symmetric about the mentioned plane of symmetry (10), and each one of the mentioned strain gauges (2) are non-detachably fixed on the inside of the crank arm (1) within 10 the straight drilled blind hole (5, 6) walls.It is also object of the invention a power meter apparatus (40) to calculate jointly and separately the instantaneous power delivered for each cyclist's leg, comprising two of the aforementioned pedaling torque sensor devices, means to measure the instantaneous angular velocity of the crankset and a power meter CPU (35) that integrates and processes the signals received.

An actual vehicle actuator operation control input and a model operation control input are determined by an FB distribution law such that the difference between a reference state amount determined in a vehicle model and an actual state amount of an actual vehicle approximates zero, and then an actuator device of the actual vehicle and the vehicle model are operated on the basis of the control inputs. The value of a parameter of the vehicle model is set according to an actual vehicle motional state such that the attenuation property of a reference state amount when a drive manipulated variable is changed is higher than the attenuation property of an actual state amount. Accordingly, the actual vehicle actuator device is properly controlled independently of an actual vehicle motional state such that a state amount related to an actual vehicle motion approximates a vehicle state amount on a dynamic characteristic model.

Systems, computer implemented methods, and program products to determine approximate static well pressures for one or more arbitrary shaped wells by estimating the drainage volume of the one or more wells, are provided. The drainage volume of the one or more wells, for example, can be estimated from the one or more computed fluid flow flux vectors, and the approximate static well pressures for the one or more wells can be subsequently calculated by taking the pore volume average of the dynamic grid block pressures within the drainage volume of the one or more wells. The one or more fluid flow flux vectors can be calculated at each iteration in a numerical reservoir simulator as a part of standard simulator computations, negating a need for additional, extraneous computations to calculate effective drainage volume of the one or more wells.

A method and system for performing a data stream query. A data stream query requiring a join operation on multiple data streams is approximated without performing the join operation. It is determined whether conditions of the query are proper to accurately approximate the join operation, and if the conditions are proper the join operation is approximated. The join operation is approximated by independently aggregating values of the data streams and comparing the independently aggregated values.

A computer program product for processing a model of an object according to a set of instructions includes a non-transitory computer-readable memory storing a model of an object represented by a hybrid adaptively sampled distance field (ADF), wherein the model includes a hierarchy of cells, wherein at least one cell includes a set of distance functions forming at least part of a boundary of the object and a set of distance samples of at least some of the distance functions, such that a processor executing the set of instructions processes the model of the object.

An exhaust gas purification device of an internal combustion engine having a NOx catalyst provided to an exhaust passage for occluding NOx in a lean atmosphere and for reducing the occluded NOx in a rich atmosphere has an exhaust gas recirculation passage for recirculating the exhaust gas from the exhaust passage to an intake passage, an exhaust gas recirculation valve provided in the exhaust gas recirculation passage, a rich combustion control section for performing rich combustion in the internal combustion engine, and an exhaust gas recirculation valve control section for controlling an opening degree of the exhaust gas recirculation valve to conform a pressure value in the intake passage to a predetermined pressure value while the rich combustion control section performs the rich combustion.

A monitoring system for monitoring a state of a fluid in an indoor space including a state of a flow field for said fluid is presented. The system includes an input unit (81), a simulation unit (82), a comparison unit (83) and a state correction unit (84). The input unit (81) comprises a plurality of temperature sensors (81a, 81b, . . . , 81mT) to obtain temperature measurement data indicative for a temperature field in said indoor space. The simulation unit (82) is provided to simulate the fluid in said indoor space according to an indoor climate model to predict a state of the fluid including at least a temperature field and a flow field for the fluid in said indoor space, and has an output to provide a signal indicative for the flow field. The comparison unit (83) is provided to compare the predicted temperature field with the temperature measurement data, and the state correction unit (84) is provided to correct the predicted state of the fluid based on a comparison result of said comparison unit (83). The monitoring system may be part of a climate control system.

A method and apparatus for measuring bandwidth of light emitted from a laser is disclosed which may comprise: a first and second wavelength sensitive optical bandwidth detectors providing, respectively, an output representative of a first parameter indicative of the bandwidth of the emitted light as measured respectively by the first and second bandwidth detectors, and an actual bandwidth calculation apparatus adapted to utilize these two outputs as part of a multivariable linear equation employing predetermined calibration variables specific to either the first or the second bandwidth detector, to calculate a first actual bandwidth parameter or a second actual bandwidth parameter. The first actual bandwidth parameter may be a spectrum full width at some percent of the maximum (“FWXM”), and the second actual bandwidth parameter may be a portion containing some percentage of the energy (“EX”). The first and second bandwidth detectors may an etalon and the outputs may be representative of a fringe width of a fringe of an optical output of the respective etalon at FWXM. The precomputed calibration variables may be derived from respective three dimensional plots representing, respectively, detector outputs in relation to a calibrating input light with known values of the first and second actual bandwidth parameters, which may be FWXM and EX. The first / second three dimensional plot may provide a solution: (first / second output)=(a / d*(calibrating input light known value of FWXM))+(b / e*(calibrating input light known value of EX)+c / f; and the actual bandwidth calculation apparatus may use the derived equation: (first actual bandwidth parameter)=((b*(second output))−(e*(first output))+ce−bf) / (bd−ae), or the equation: (second actual bandwidth parameter)=((a*(second output))−(d*(first output))+cd−af) / (ae−bd). FWXM may be FWHM and EX may be E95. The transfer function of the first optical bandwidth detector may be selected to be much more sensitive to FWXM than to EX and the transfer function of the second optical bandwidth detector may be selected to be much more sensitive to EX than to FWXM.

In a circuit breaker, a current transformer for fault powering trip unit electronics and sensing low currents and high currents includes a core with solid laminations and gapped laminations to sense a wide range of currents from locked-rotor currents to high, instantaneous short-circuit currents in a single current transformer. The current transformer can also fault power trip unit electronics without requiring an additional current transformer. The operating range of the circuit breaker is significantly enhanced compared to existing breakers that can sense only a limited range of current levels.

One embodiment includes a surgical wound closure device comprising a substrate having a proximal surface and a distal surface; a drape having a proximal surface and a distal surface, and being disposed proximally to said substrate; and an adhesive layer having a proximal surface and a distal surface; said drape being disposed releasably adherently to said distal surface of said adhesive layer. Another embodiment includes a surgical procedure comprising the steps of providing a surgical wound closure device comprising a substrate having a proximal surface and a distal surface, a drape having a proximal surface and a distal surface and being disposed proximally to said substrate, and an adhesive layer having a proximal surface and a distal surface, where said drape being disposed releasably adherently to said distal surface of said adhesive layer; positioning the proximal surface of said adhesive layer on the skin of a patient; separating said substrate from said drape and adhesive layer to expose said distal surface of said drape; making a surgical incision through said drape; performing a surgical procedure; removing said drape from said adhesive layer to expose said distal surface of said adhesive layer; aligning said substrate and said adhesive layer; and adhering said proximal surface of said substrate to said distal surface of said adhesive layer.