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2696 results about "Linear relationship" patented technology

Linear relationship. A relationship of direct proportionality that, when plotted on a graph, traces a straight line. In linear relationships, any given change in an independent variable will always produce a corresponding change in the dependent variable.

Systems and methods for determining intracranial pressure non-invasively and acoustic transducer assemblies for use in such systems

Systems and methods for determining ICP based on parameters that can be measured using non-invasive or minimally invasive techniques are provided, wherein a non-linear relationship is used to determine ICP based on one or more variable inputs. The first variable input relates to one or more properties of a cranial blood vessel and / or blood flow, such as acoustic backscatter from an acoustic transducer having a focus trained on a cranial blood vessel, flow velocity in a cranial blood vessel, and the like. Additional variables, such as arterial blood pressure (ABP), may be used in combination with a first variable input relating to one or more properties of a cranial blood vessel, such as flow velocity of the middle cerebral artery (MCA) to derive ICP using a non-linear relationship. Methods and systems for locating target areas based on their acoustic properties and for acoustic scanning of an area, identification of a target area of interest based on acoustic properties, and automated focusing of an acoustic source and / or detector on a desired target area are also provided. Acoustic transducer assemblies are described.
Owner:PHYSIOSONICS +1

Systems and methods for controlling illumination sources

Provided are methods and systems for controlling the conversion of data inputs to a computer-based light system into lighting control signals. The methods and systems include facilities for controlling a nonlinear relationship between data inputs and lighting control signal ouputs. The nonlinear relationship may be programmed to account for varying responses of the viewer of a light source to different light source intensities.
Owner:PHILIPS LIGHTING NORTH AMERICA CORPORATION

Method for modeling devices in a wafer

A method for modeling devices in a wafer comprises the step of providing the wafer comprising a first plurality of devices having a track width and a first stripe height, a second plurality of devices having the track width and a second stripe height, and a third plurality of devices having the track width and a third stripe height. The method further comprises the steps of measuring resistance values for the first, second and third plurality of devices to obtain a data set correlating a stripe height and a resistance value for each of the first, second and third plurality of devices, and estimating a linear relationship between resistance and inverse stripe height for the first, second and third plurality of devices based on the data set.
Owner:WESTERN DIGITAL TECH INC

Non-linear artificial ligament system

ActiveUS20070005137A1Non-linear relationshipInternal osteosythesisJoint implantsHuman bodyClosed loop
Various methods and devices for ligament replacement in the human body, and in particular, the spine are provided. In an exemplary embodiment, a ligament replacement system is provided that has an artificial ligament configured in the form of a closed loop. The artificial ligament is adapted to be coupled between the ligament seating regions of first and second connection members in a connection geometry that results in the artificial ligament having a large motion with a non-linear relationship between the force and displacement, similar to that of a natural ligament.
Owner:DEPUY SPINE INC (US)

Multipurpose exercise system

An exercise system is provided in which multiple exercise routines may be conducted with a single system. The exercise system may be used for skiing exercises, rowing exercises, and for weight training / resistance exercises. The exercise system may also be stored in a compact position and may by integrated with articles of furniture for space saving benefits. In one embodiment, resistance to motion is provided by one or more tension transmission members and may be selectively adjusted by controlling the configuration of the tension transmission member relative to a torsion spring. Use of intermediate devices between the spring and the tension transmission member are described that provide a non-linear relationship between force and displacement. In another embodiment, the tension transmission member may be configured in different positions by adjusting the position of movable pulleys, thereby allowing the device to be used for a number of different exercise routines.
Owner:STUDIO MODERNA SA

Composition for controlling wellbore fluid and gas invasion and method for using same

The disclosure is directed to a composition for controlling wellbore fluid and gas invasion including methods for using said composition. The composition of the invention is a flowable slurry preferably comprising about 70 to 30% by weight of magnesium oxychloride and about 70 to 30% by weight of water. The composition is a flowable slurry at composition temperatures below about 60° C. and sets to form a substantially solid mass upon reaching a composition temperature of about 60-68° C. The phase transition is rapid, thereby limiting or avoiding formation of gel states which contribute to incomplete wellbore seals. The rapid set of the slurry further avoids invasive contamination of earthen formations surrounding the wellbore. The composition has a near-linear relationship between the time required for the phase transition to occur and the composition temperature at which the phase transition occurs. This advantageous property permits the composition set time to be accurately determined and modified as required through the addition of accelerators and inhibitors. The phase transition occurs predictably at high pressures typical of those encountered in wellbore operations. Additives may be included to modify the properties of the composition. The method includes use of the composition to control the loss of fluids and gases from the wellbore.
Owner:HALLIBURTON ENERGY SERVICES INC

Method for calibrating industry robot

ActiveCN101231749AChange the status quo of repeated positioning accuracy calibrationImage analysisUsing optical meansPosition errorLinear relationship
The invention relates to an industrial robot calibration method. The method comprises the following steps of : establishing a position and orientation transformational matrix of the coordinate system of a robot end effector relative to a base coordinate system; establishing a position coordinate vector P of the center of the gauge head of a laser tracker arranged on the end effector relative to the base coordinate system through the position and orientation transformational matrix; getting a linear relationship of position error with structural parameter error and joint variable error through a total differential of the position coordinate vector P; getting a compensation value of the structural parameter error and the joint variable error by substituting the position coordinate vector in the linear relationship; finally, getting the accurate position and orientation transformation matrix of the coordinate system of the robot end effector relative to the base coordinate system, thus completing the calibration of the positioning accuracy of the robot and eliminating the technical bias. The calibrated industrial robot can meet the requirements of various application occasions and running positions.
Owner:KUSN HUAHENG ENG TECH CENT

Coating with improved hiding, compositions prepared therewith, and processes for the preparation thereof

A coating containing pigment particles and a polymer matrix is provided. The coating contains pigment particles that have a scattering coefficient with a linear or quasi-linear relationship to the pigment volume concentration of those pigment particles. The coating has improved hiding and is useful as a protective coating or an aesthetic coating on an underlying substrate. Also provided are compositions useful for preparing the coating, including covalently bonded composite particles and aqueous dispersions containing composite particles. The composite particles each contain a pigment particle with a plurality of polymer particles attached by adsorption on the outer surface of the pigment particle or by covalent bonding to the pigment particle through a coupling agent. Methods to prepare the composite particles and coating compositions containing the composite particles are also provided.
Owner:ROHM & HAAS CO

Copolymer 1 related polypeptides for use as molecular weight markers and for therapeutic use

InactiveUS7074580B2Accurate and robust calibration setTherapeutic utilityPeptide/protein ingredientsDisease diagnosisRetention timeLinear relationship
The present invention provides processes for determining the molecular weight of glatiramer acetate and other copolymers using molecular weight markers. The present invention further provides a plurality of molecular weight markers for determining the molecular weight of glatiramer acetate and other copolymers which display linear relationships between molar ellipticity and molecular weight, and between retention time and the log of the molecular weight. The molecular weight markers also optimally demonstrate biological activity similar to glatiramer acetate or corresponding copolymers and can be used for treating or preventing various immune diseases.
Owner:YEDA RES & DEV CO LTD

Traffic estimation

Methods, systems, and articles of manufacture of the present invention may assist in planning, execution, and evaluation of advertising campaigns on the Internet. Particularly, methods, systems, and articles of manufacture of the present invention may help evaluate and / or predict traffic volume on the Internet. An exemplary method for predicting traffic may comprise receiving historical traffic data for a location, and computing a prediction of traffic volume for a particular time at the location based on a linear relationship in the historical traffic data.
Owner:MICROSOFT TECH LICENSING LLC

Startup circuit for converter with pre-biased load

A method of starting a DC—DC converter into a precharged output voltage including generating a reference voltage having a linear relationship with the output voltage such that the reference voltage ranges between a minimum and maximum voltage level of a PWM triangular waveform as the output voltage ranges between zero and an input voltage level, and enabling output switching of the DC—DC converter when the reference voltage is approximately equal to a compensation signal generated by an error amplifier comparing the reference voltage with a feedback signal representative of the output voltage. Generating a reference voltage may include applying a first current based on the input voltage through two resistors to develop the minimum and maximum voltage levels, applying the first current in one direction through a third resistor, and applying a second current based on the output voltage through the third resistor in the opposite direction.
Owner:INTERSIL INC

Method and apparatus for active power factor correction with minimum input current distortion

A method for reducing the harmonics contents of an input current drawn from a power line into an electrical system without sensing an input voltage, the method comprising providing an active power factor correction controller with a switch module having a main switch and a timing device, wherein the main switch has an on-time correlated with an on-duty cycle duration, and an off-time correlated with an off-duty cycle duration, and maintaining a linear relationship between the off-duty cycle duration and the input current by using the timing device; and an apparatus for active power factor correction with minimum input current distortion, comprising an active power factor correction assembly that includes a main switch and a timing device, wherein the main switch has associated therewith an on-time correlated with an on-duty cycle duration, and an off-time correlated with an off-duty cycle duration, and wherein the timing device generates the mentioned on-time and off-time, and linearization means for maintaining a linear relation between the off-duty cycle duration and the input current.
Owner:GREEN POWER TECH LTD

Infrared ear thermometer

An infrared ear thermometer includes a detector head housing, a heat sink, a recess formed in the heat sink, a thermopile sensor mounted within the recess, a thermistor, and temperature determination circuitry. The recess defines an aperture that limits the field of view of the thermopile sensor. The thermal capacities and conductivities of the heat sink and the thermopile sensor are selected so that the output signal of the thermopile sensor stabilizes during a temperature measurement. A method of determining temperature using the ear thermometer takes successive measurements, stores the measurements in a moving time window, averages the measurements in the moving window, determines whether the average has stabilized, and outputs an average temperature. A method of calculating a subject's temperature determines the temperature of a cold junction of the thermopile, looks up a bias and slope of the thermopile based upon the temperature of the cold junction, measures the output of the thermopile, and calculates the subject's temperature based upon a linear relationship between the output and the subject's temperature. The linear relationship is defined by the bias and the slope.
Owner:GERLITZ JONATHAN

Non-linear artificial ligament system

Various methods and devices for ligament replacement in the human body, and in particular, the spine are provided. In an exemplary embodiment, a ligament replacement system is provided that has an artificial ligament configured in the form of a closed loop. The artificial ligament is adapted to be coupled between the ligament seating regions of first and second connection members in a connection geometry that results in the artificial ligament having a large motion with a non-linear relationship between the force and displacement, similar to that of a natural ligament.
Owner:DEPUY SPINE INC (US)

Method and Apparatus for Determining Cardiac Performance in a Patient with a Conductance Catheter

ActiveUS20080234588A1Determining performanceCatheterSensorsHeart chamberCardiac functioning
An apparatus for determining cardiac performance in the patient involving a conductance catheter (12) for measuring conductance and blood volume in a heart chamber of the patient. The apparatus includes a processor (14) for determining instantaneous volume of the ventricle by applying a non-linear relationship between the measured conductance and the volume of blood in the heart chamber to identify mechanical strength of the chamber. The processor (14) is in communication with the conductance catheter (12).
Owner:BOARD OF RGT THE UNIV OF TEXAS SYST

Lithium battery capacity rapid estimation method

The invention relates to the technical field of lithium battery parameter determination methods, in particular to a lithium battery capacity rapid estimation method. The lithium battery capacity rapid estimation method comprises the following steps: (1) taking the-number-set training sample batteries to have an internal resistance test by using a composite pulse current method in order to obtain internal resistance values of the training sample batteries, (2) testing capacity values of the training sample batteries by using a constant current constant voltage test method, (3) taking time-set various current internal resistance of different sampling time of the training sample batteries as input and taking the capacity values as output to establish an internal resistance-capacity neural network model, (4) and testing internal resistance of predicting sample batteries and evaluating the capacity values by using the internal resistance-capacity neural network model established by the training sample batteries. By using the non-linear relationship between the internal resistance and the capacity to establish the internal resistance-capacity neural network model, the lithium battery capacity rapid estimation method can rapidly estimate the capacity of the batteries, eliminate the batteries which have no use value, reduce power loss and equipment loss required in a traditional capacity test, and greatly improve economy.
Owner:BEIJING BEIJIAO NEW ENERGY TECH CO LTD

Copolymer 1 related polypeptides for use as molecular weight markers and for therapeutic use

InactiveUS7163802B2Accurate and robust calibration setTherapeutic utilityPeptide/protein ingredientsDisease diagnosisRetention timeLinear relationship
The present invention provides processes for determining the molecular weight of glatiramer acetate and other copolymers. The present invention further provides a plurality of molecular weight markers for determining the molecular weight of glatiramer acetate and other copolypmers which display linear relationships between molar ellipticity and molecular weight, and between retention time and the log of the molecular weight. The molecular weight markers also optimally demonstrate biological activity similar to glatiramer acetate or corresponding copolymers and can be used for treating or preventing various immune diseases. In addition, the subject invention provides pharmaceutical compositions for the treatment of immune diseases comprising a polypeptide having an identified molecular weight and an amino acid composition corresponding to glatiramer acetate or a terpolymer.
Owner:YEDA RES & DEV CO LTD

Automatic focusing microscope based on eccentric beam method and focusing method thereof

The invention discloses an automatic focusing microscope based on an eccentric beam method and a focusing method thereof. The hardware comprises an eccentric beam defocus amount detection module, a microscopic imaging module, a piezo lens drive, an XY stage and a computer processing system. The defocus amount detection module transmits a semicircular laser beam to irradiate the surface of a sample and acquire a semicircular spot image formed by sample reflection. The computer processing system uses self-adaptive median filtering, Canny edge detection based on OSTU, the least square fitting and other algorithms to process the grayscaled spot image to acquire spot radius. According to a radius-defocus amount linear relationship model, the sample defocus amount in a field of vision can be calculated. The piezo lens drive drives a lens to compensate the defocus amount. After focusing, the microscopic imaging module acquires a clear sample image. The automatic focusing microscope based on the eccentric beam method and the focusing method thereof, which are provided by the invention, have the advantages of fast focusing speed, high focusing accuracy and large linear range, and can meet the requirement of fast and precise focusing of the microscope under a high power lens.
Owner:SHANGHAI JIAO TONG UNIV

Methods for determining intracranial pressure non-invasively

InactiveUS7547283B2Medical data miningDiagnostics using vibrationsSound sourcesCentral sulcus artery
Systems and methods for determining ICP based on parameters that can be measured using non-invasive or minimally invasive techniques are provided, wherein a non-linear relationship is used to determine ICP based on one or more variable inputs. The first variable input relates to one or more properties of a cranial blood vessel and / or blood flow, such as acoustic backscatter from an acoustic transducer having a focus trained on a cranial blood vessel, flow velocity in a cranial blood vessel, and the like. Additional variables, such as arterial blood pressure (ABP), may be used in combination with a first variable input relating to one or more properties of a cranial blood vessel, such as flow velocity of the middle cerebral artery (MCA) to derive ICP using a non-linear relationship. Methods and systems for locating target areas based on their acoustic properties and for acoustic scanning of an area, identification of a target area of interest based on acoustic properties, and automated focusing of an acoustic source and / or detector on a desired target area are also provided. Acoustic transducer assemblies are described.
Owner:PHYSIOSONICS +1

Linear capacitance measurement and touchless switch

Capacitance measurement apparatus that enhances the sensitivity and accuracy of capacitive transducers, proximity sensors, and touchless switches. Each of two capacitors (C1, C2) under measurement has one end connected to ground and is kept at substantially the same voltage potential by operational amplifier (A1) or amplifiers (A0, A1) using negative feedback. The apparatus is driven by a periodic e.g. sinusoidal signal source (G1) or sources (G1, G2) and includes a difference amplifier (A2) operative to produce an electrical signal having a linear relationship with a specified arithmetic function of the capacitances of the two capacitors (C1, C2). A touchless switch is implemented using the capacitance measurement apparatus. The touchless switch includes two sensor electrodes (E1, E2) that correspond to the two capacitors (C1, C2) under measurement and in one embodiment has a front surface in the form of a container.
Owner:LEE YING LAU

Thin-walled structure part vibration test device and method based on piezoelectric ceramic vibration exciter

The invention belongs to the technical field of vibration test, in particular to a thin-walled structure part vibration test device and a method based on a piezoelectric ceramic vibration exciter. The device comprises a signal generator, a piezoelectric ceramic drive power supply, a piezoelectric ceramic vibration exciter, a feedback attenuator, a laser vibration meter, a data acquisition analyzer and an upper computer. The method comprises the steps of performing modality test on a thin-walled structure part, determining a linear relationship between excitation voltage and critical excitation frequency of the signal generator and calibrating an excitation force of the piezoelectric ceramic vibration exciter based on a cantilever theory. According to the device and the method, an excitation signal can be effectively acquired; the magnitude of the excitation force when the piezoelectric ceramic vibration exciter excites the structure part is defined; the stable designated excitation force and the linear excitation signal of the excitation frequency can be generated; influencing factors of non-linear piezoelectric ceramic excitation are effectively eliminated; the piezoelectric ceramic vibration exciter is adopted to realize high-frequency vibration excitation; additional mass is low; and the device is convenient to use.
Owner:NORTHEASTERN UNIV

System, apparatus, and method for conducting electromagnetic induction surveys

A method is provided for conducting an electromagnetic induction survey of a geological formation penetrated by a borehole lined with a conductive casing. The method includes positioning a transmitter in the borehole, whereby the transmitter generates a transmitter magnetic moment, and positioning a distant receiver external of the borehole to detect a magnetic field induced by the transmitter, whereby the distant receiver is disposed across part of the formation from the borehole. Furthermore, an auxiliary receiver is positioned in the borehole proximate the transmitter to detect a magnetic field induced by the transmitter and attenuated by the conductive casing. Subsequently, a first casing attenuation factor that is applicable to the magnetic field measured by the auxiliary receiver is determined from a ratio of the measured magnetic field at the auxiliary receiver and the transmitter magnetic moment. A second casing attenuation factor applicable to the measurement of the magnetic field at the distant receiver is determined from a non-linear relationship (e.g., a power law relationship) between the first casing attenuation factor and the second attenuation factor, wherein the second attenuation factor is less than the first attenuation factor. Then, a formation attenuation factor applicable to the measured magnetic field at the distant receiver is determined from a relationship between the magnetic moment of the transmitter, the second casing attenuation factor, and the measured magnetic field at the distant receiver. Finally, the method correlates the determined value of the formation attenuation factor to a resistivity characteristic of the formation between the distant receiver and the transmitter.
Owner:SCHLUMBERGER TECH CORP

One point calibration integrated temperature sensor for wireless radio frequency applications

A low power analog linear temperature sensor integrateable with digital and / or analog circuits in CMOS fabrication processes. The sensor is accurately calibrateable at a single temperature that yields a linear relationship between measured differential voltage and temperature over a wide variety of temperature ranges. The sensor provides stable voltage and current references that are essential for wireless sensor platforms. There are many applications where sensors require stable voltage / current references and the physics of the sensor's transduction mechanisms are themselves temperature dependent. Wireless platforms such as, but not limited to, passive RFID tags with the addition of on- or off-chip sensors provide a low cost solution for a variety of low cost sensor applications.
Owner:ALTIVERA

Calibratable programmable phase shifter

A programmable phase shifter includes a tapped delay line for successively delaying a periodic reference signal to produce a set of phase distributed tap signals. A multiplexer selects one of the tap signals as input to a programmable delay circuit which further delays the selected tap signal to produce an output signal that is phase shifted from the reference signal. A programmable data converter converts input data indicting a desired phase shift between the reference signal and the output signal into data for controlling the multiplexer selection and the amount of delay provided by the programmable delay circuit. The relationship between conversion table input and output data is adjusted so that the period of the output signal has a desired linear relationship to the input data value.
Owner:CREDENCE SYSTEMS

Unmanned aerial vehicle inspection head control method based on visual servo

The invention discloses an unmanned aerial vehicle inspection head control method based on visual servo. The method comprises the steps of: 1, obtaining video information by an imaging device; 2, matching a frame real-time image with a template image, obtaining a pixel deviation and determining a deviation P of the image center; 3, judging whether P is greater than a deviation threshold, if not, indicating a normal situation, and finishing this detection, if so, turning to the next step; 4, determining a rotating direction through P, then rotating the holder for the minimal unit d; 5, obtaining the device image at a current position again; 6, trying a new target position by a tracing algorithm; determining the deviation P1 of the new position and the template image; 7, judging whether P is greater than the threshold according to the linear relationship between holder rotation and the pixel deviation in the image, if not, finishing this detection, and if so, returning to the step 5. Location filming of the target in the unmanned aerial vehicle inspection process is effectively solved, and the inspection efficiency and quality are improved.
Owner:STATE GRID INTELLIGENCE TECH CO LTD

Systems and methods for amplification of a communication signal

Bandwidth reduction of amplitude and / or phase components of relatively wide bandwidth composite signal. In an exemplary embodiment, an EER amplifier system for CDMA signal amplification includes an amplitude bandwidth reduction module included in an amplitude signal component path and a phase bandwidth reduction module is included in a phase signal component path, for controlling an RF amplifier. The phase bandwidth reduction module may reduce the phase component bandwidth of the input signal by, for example, generating a non-linear relationship between phase signal amplitude and input signal amplitude. The amplitude bandwidth reduction module may reduce the amplitude component bandwidth of the input signal by, for example, generating a non-linear relationship between the supply voltage to the RF amplifier and an input signal amplitude.
Owner:UNWIRED PLANET

Image defect inspection method, image defect inspection apparatus, and appearance inspection apparatus

In an image defect inspection method and apparatus which detects a gray level difference between corresponding portions of two images, automatically sets a threshold value based on the distribution thereof, compares the gray level difference with the threshold value, and judges one or the other of the portions to be defective if the gray level difference is larger than the threshold value, provisions are made to correct the threshold value when the distribution of the gray level difference is different from the usual distribution, thereby achieving high detection sensitivity while suppressing the occurrence of false defects. To achieve this object, the cumulative frequency of the gray level difference is computed (S3); a converted cumulative frequency is computed by converting the cumulative frequency so that the cumulative frequency shows a linear relationship with respect to the gray level difference when the gray level difference is assumed to exhibit a distribution that obeys a prescribed type of distribution (S4); an approximation curve of the converted cumulative frequency is derived (S11); the second derivative of the approximation curve with respect to the gray level difference is computed (S12); and the threshold value is corrected in accordance with the second derivative (S13).
Owner:TOKYO SEIMITSU
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