130 results about "Sensitivity to change" patented technology

Systems and methods for implantable devices that transmit and receive RF transmissions are provided. More particularly, the implantable device includes an antenna encapsulated within a non-hermetic material, wherein the antenna is spaced from the non-hermetic material by an air gap. Preferably, the spacing is provided by one or more enclosures that maintain the air gap surrounding the antenna during and after the manufacture of the device. The one or more enclosures can be in the form or tubing formed from glass, or the like, at least partially surrounding the antenna. By increasing the amount of air encapsulated within the implantable device, and particularly proximal to (e.g., around) the antenna, the susceptibility to changes in RF performance is reduced.

A system and method in accordance with the present invention provides for a low cost, bulk micromachined accelerometer integrated with electronics. The accelerometer can also be integrated with rate sensors that operate in a vacuum environment. The quality factor of the resonances is suppressed by adding dampers. Acceleration sensing in each axis is achieved by separate structures where the motion of the proof mass affects the value of sense capacitors differentially. Two structures are used per axis to enable full bridge measurements to further reduce the mechanical noise, immunity to power supply changes and cross axis coupling. To reduce the sensitivity to packaging and temperature changes, each mechanical structure is anchored to a single anchor pillar bonded to the top cover.

A fluidic lens device capable of providing variable focal power with reduced optical aberration is disclosed. The device includes a lens member and an actuator. The lens member comprises one or more elastic optical surfaces, a compliant support member in communication with the optical surfaces, and a fluid-filled chamber. The optical surfaces have a high value of elastic modulus, reducing coma and other aberrations associated gravity and acceleration. The support member may provide a compliant fluid seal and allow the edges of the optical surfaces to pivot, reducing spherical and other aberrations. One or more piezoelectric ring-bender actuators may provide the force required for compressing the support ring and deflecting the optical surfaces. The actuators may be configured to provide the fluidic lens device with reduced sensitivity to changes in temperature.

Broadband energy incident on a transducer having partially or fully reflective surfaces separated by a gap which is greater than the coherence length of the broadband energy but smaller than one-half a coherence length of a band of energy within said broadband energy causes a portion of the spectral content of the broadband energy corresponding to a coherence length greater than twice the gap length to exhibit interference effects while the average power of the broadband energy remains unaffected. Splitting energy reflected from the transducer into two beams which are filtered at preferably similar center frequencies but with different pass bands yields beams which are radically different in sensitivity to changes in gap length. Analyzing the beams to derive a ratio of powers (since source intensity and fiber attenuation in a common fiber are thus self-cancelling) allows high accuracy and high resolution absolute measurement of temperature, pressure or strain. Effects of any of these physical parameters which are not of interest in a measurement can be fully compensated or made arbitrarily insignificant in a simple transducer structure of extremely small size. Use of broadband energy permits measurement over greater lengths of optical fiber.

An I/O routing pattern method is disclosed, for use with heterogeneous printed circuit boards (PCBs), such as those embedded with a reinforcement material, for example, a fiberglass weave. Traces are routed on the PCB so as to reduce sensitivity to changes in the dielectric constant (D_k), which are brought about by the strands of reinforcement material contained within the PCB laminate. The method minimizes the local variations, such as the D_k, time of flight, and capacitance variations, that are observed with traditional routing methods on heterogeneous PCBs.

The technology disclosed relates to granular analysis of design data used to prepare chip designs for manufacturing and to identification of similarities and differences among parts of design data files. In particular, it relates to parsing data and organizing into canonical forms, digesting the canonical forms, and comparing digests of design data from different sources, such as designs and libraries of design templates. Organizing the design data into canonical forms generally reduces the sensitivity of data analysis to variations in data that have no functional impact on the design. The details of the granular analysis vary among design languages used to represent aspects of a design. For various design languages, granular analysis includes partitioning design files by header/cell portions, by separate handling of comments, by functionally significant/non-significant data, by whitespace/non-whitespace, and by layer within a unit of design data. The similarities and differences of interest depend on the purpose of the granular analysis. The comparisons are useful in many ways.

The present invention relates to fiberoptic sensors embedded within a surgical drain to monitor the condition of tissue proximate to the surgical drain and methods of processing data from the sensors. The light transmitting and collecting tips of the optical fibers are adapted to enable sideways interrogation of the adjacent tissues using optical techniques to measure the tissue condition. The light transmitting and collecting tips of the optical fibers may be bent at angle, disposed between a light absorbing and transmitting sheets, or uncladded to enable sideways emission and collection of light. Processing methods for reducing the site dependency of the measured data, maximizing the signal to noise ratio, and increasing the measurement sensitivity to changes in the tissue condition are described.

The invention provides a technical scheme, in particular an involute straight tooth cone gear trimming method. The method comprises the following steps of: determining a tooth trimming position, a trimming quantity and a tooth profile quantity; solving for a spherical space involute Decare coordinate equation; generating a spherical involute in three-dimensional modeling software, forming a spherical involute plane through curve filling, and realizing straight tooth cone gear solid modeling on the basis of the spherical involute; forming a tooth trimming profile on the central cross section of the gear, and isometrically stretching the profile to the tooth surface to realize tooth isometric trimming; carrying out tooth top arc trimming on the tooth profile; and converting a trimming gear model into a digital control code imported into a digital control machine tool to realize the processing of the trimming cone gear. The invention better controls the stress distribution of the gear through controlling the position and the trimming quantity of the isometric trimming so as to compensate the deformation of the gear and reduces the sensitivity of a cone gear pair to errors and load changes as well as improves the transmission precision of the cone gear pair, reduces the vibration and the noise and prolongs the service life of the gear.

The method and system quantify the impact of various design and operational solutions for equipment modules of a structure and the overall structure based upon economic factors. In particular, the method and system provide cost evaluation of various maintenance approaches for at least one equipment module that is part of an overall structure. In addition, a baseline and alternate equipment module may be specified for each equipment module. The costs associated with each of the maintenance approaches for each baseline and alternate equipment module then may be compared and the costs associated with the overall structure having a chosen maintenance approach for each baseline and alternate equipment module may be evaluated. The sensitivity of the costs associated with the overall structure to changes in one or more of the parameter values also may be calculated.

A method and system for estimating native hydrocarbons from oil-based drilling muds with the aid of NMR data. Adaptive echo stacking may be used to balance between precision and sensitivity to changes in the fluid composition. Apparent T₂ decay time and effective diffusion constants derived from the NMR data may be transformed into an indication of native hydrocarbon type, using known diffusion constants, fuzzy logic, and neural networks.

The invention provides an early warning method and an early warning system. The early warning method comprises the following steps of: collecting a current monitoring value; then, comparing the current monitoring value with a recorded history monitoring vale to generate a change value; and comparing the change value with a pre-set threshold value according to an early warming policy to generate an early warming signal. The early warning system comprises a collecting module for collecting the current monitoring value and an early warming judgment component for judging the early warming signal. According to the early warning method and the early warning system provided by the invention, the sensibility on abnormal condition change of the monitoring value is increased; the production and operation safety is increased; and particularly, the operation safety of coal mine enterprises is increased.

The invention relates to an integrated circuit and discloses a current reference source circuit and a method for generating a current reference source. The method comprises the following steps of: generating a linear positive temperature coefficient current, a nonlinear negative temperature coefficient current and a nonlinear positive temperature coefficient current through three circuits respectively; superimposing the three currents; and taking the superimposed output currents as the current reference source. The linear positive temperature coefficient current is used for effectively offsetting linear components in the nonlinear negative temperature coefficient current, and the nonlinear positive temperature coefficient current is used for compensating residual nonlinear negative temperature coefficients, so that the sensitivity of the acquired currents to temperature changes is further reduced, and the current reference source which approximates to a zero temperature coefficient can be realized.

The technology disclosed relates to granular analysis of design data used to prepare chip designs for manufacturing and to identification of similarities and differences among parts of design data files. In particular, it relates to parsing data and organizing into canonical forms, digesting the canonical forms, and comparing digests of design data from different sources, such as designs and libraries of design templates. Organizing the design data into canonical forms generally reduces the sensitivity of data analysis to variations in data that have no functional impact on the design. The details of the granular analysis vary among design languages used to represent aspects of a design. For various design languages, granular analysis includes partitioning design files by header/cell portions, by separate handling of comments, by functionally significant/non-significant data, by whitespace/non-whitespace, and by layer within a unit of design data. The similarities and differences of interest depend on the purpose of the granular analysis. The comparisons are useful in many ways.