37results about How to "Eliminate bias effects" patented technology

Described herein are methods and apparatus for measuring the effect of an online advertisement campaign on online behavior (searches relevant to the campaign and/or click activity on particular sponsored, algorithmic, and/or third-party links) of exposed users who have received a campaign advertisement. Online events of exposed and unexposed users are logged during a pre-campaign period (before any users receive any campaign advertisements) and a campaign period (when exposed users receive a campaign advertisement). A variety of behavior measurements and metrics may be determined using the logged user events. A metric may indicate the difference of an online activity between exposed and unexposed users during the campaign period or between exposed users during the pre-campaign and campaign periods. A metric may indicate the campaign's effect on an online activity by exposed users during the pre-campaign and campaign period in comparison to the online activity by unexposed users during the same periods.

Described herein are methods and apparatus for measuring the effect of an online advertisement campaign on online behavior (searches relevant to the campaign and/or click activity on particular sponsored, algorithmic, and/or third-party links) of exposed users who have received a campaign advertisement. Online events of exposed and unexposed users are logged during a pre-campaign period (before any users receive any campaign advertisements) and a campaign period (when exposed users receive a campaign advertisement). A variety of behavior measurements and metrics may be determined using the logged user events. A metric may indicate the difference of an online activity between exposed and unexposed users during the campaign period or between exposed users during the pre-campaign and campaign periods. A metric may indicate the campaign's effect on an online activity by exposed users during the pre-campaign and campaign period in comparison to the online activity by unexposed users during the same periods.

A computer-implemented method for clustering a plurality of observations included in a dataset. The method includes selecting a subset of variables from a set of variables, where each variable in the subset is associated with each observation in the dataset; for each of a first number of times, randomly selecting an initial value for each variable in the subset to generate a seed value set that includes an initial value for each variable in the subset; generating a number of pre-clusters equal to the first number based on a similarity between each observation in the dataset and each of the first number of seed value sets; and applying a hierarchical clustering algorithm to the first number of pre-clusters to derive a second number of clusters.

Time-series data over the range of a projection angle is created from a sinogram. Then, time-series data made up of opposite data corresponding to the time-series data over the range of a projection angle is created. Based on the amount of the error between the two types of time-series data, the amount of position deviation of a revolution axis is calculated.

The invention discloses a method for teeth model parameterization. The method comprises the steps of calculating geometric center points of all teeth; fitting an upper jaw dentofacial plane and a lower jaw dentofacial plane, and calculating an upper jaw dental arch curve and a lower jaw dental arch curve; determining tip points of canine teeth of the upper jaw and the lower jaw; determining far-near-middle points, near-middle points and far-middle points of the teeth; determining a teeth coordinate system according to the tip points, the far-near-middle points, the near-middle points and the far-middle points; calculating FA points, central points and cutting edge points of the teeth, and the near-far-middle cheek points of accessional teeth; performing lip cheek-direction adjustment, tongue jaw-direction adjustment, single-tooth characteristic point adjustment and original tooth die long-axis adjustment; arranging the teeth at a single jaw according to a tooth position number sequencefrom incisor teeth along a dental arch through using the middle line of the dental arch as a reference; calculating a collision value between the single tooth and the adjacent tooth with a relativelysmall tooth position number, and moving a near-middle edge point according to the collision value. The method of the invention effectively improves accuracy and rationality of the parameters after teeth model parameterization.

A semiconductor substrate structure includes a substrate having a first conductivity type, an oxide layer disposed on the substrate, and a semiconductor layer disposed on the oxide layer. The semiconductor substrate structure also includes a first buried layer disposed in the semiconductor layer, having a second conductivity type opposite to the first conductivity type. The semiconductor substrate structure further includes a second buried layer disposed in the semiconductor layer and above the first buried layer, having the first conductivity type, wherein the first buried layer and the second buried layer are separated by a distance.

The invention discloses a variable gain amplifier, which comprises a current adjustable amplifying circuit and a compensating circuit; wherein the current adjustable amplifying circuit can change the gain according to a control voltage; while the output terminal of the compensating circuit is connected with the output terminal of the current adjustable amplifying circuit, and provides direct compensating current to the adjustable amplifying circuit; the sum of the direct compensating current and the output current of the current adjustable amplifying circuit is equal to the current source current of the current adjustable amplifying circuit. The output current of the variable gain amplifier is relatively stable, which reduces the change of a common mode output level, thereby reducing the influence on the next-stage circuit offset.

An area array detection stimulated radiation depletion imaging system, including an excitation light source for generating excitation light, a depletion light source for generating depletion light, a beam expander system, a vortex phase modulation plate, a dichromatic mirror, and a wave plate , scanning galvanometer, scanning lens, tube lens, objective lens, nano-shift stage, telephoto converging lens and area array detector, the excitation light after beam expansion by the beam expander system and the beam expander system, vortex phase The lost light after beam expansion and phase modulation by the modulation plate enters the dichroic mirror and then enters the wave plate. After scanning the lens, tube lens and objective lens, focus on the inside of the sample at the nano-shift stage, and the optical signal generated by the excitation light and loss light focused on the inside of the sample at the nano-shift stage passes through the detection optical path and the telephoto converging lens Converged on the area array detector for imaging. The application is simple and convenient to operate and has high utilization rate of light energy.

The invention relates to a denitration uniformity measurement optimizing system and method under fluctuating loads. The system comprises two flue inlets formed in a side A and a side B respectively and two SCR reactors arranged between two flue outlets, remote control adjusting doors (4) are formed between the two flue inlets and the two SCR reactors, grid method tour measuring devices (2) are arranged between the two flue outlets and the two SCR reactors, reference point calibration loops (3) are arranged between the two flue outlets and the two grid method tour measuring devices, and a uniformity analysis control system (1) is further arranged and connected with the remote control adjusting doors (4), the reference point calibration loops (3) and the grid method tour measuring devices (2) separately. According to the system and method, through the reference point calibration loops, the deviation influence of NOx overall fluctuation is removed, through the uniformity measurement result, the relative amplitude of NOx values at different position points is accurately reflected, and misjudgment and wrong adjustment caused by the influence of fluctuation are avoided.

A semiconductor memory device includes a memory cell array, a charge circuit which compensates for OFF leakage current developed at selected bit lines, a reset circuit having a ground potential corresponding to a potential at non-selected bit lines, a read circuit constituted by a plurality of transistors whose gates are connected to the bit lines, and a bit line precharge circuit which charges the selected bit lines for a fixed time period. As a result of adopting such a configuration, there is no need to provide a transmission gate, such as a column decoder, to a charging path between the read circuit and the bit lines, so that a low-power supply voltage operation can be effected without the influence of a substrate bias effect.

A damping strut with a hydraulic shock absorber has a damping volume filled with an incompressible damping fluid, a retract detection device, and a compression stage throttle having a disk valve with a valve disk. The damping fluid flows through the compression stage throttle during a retraction of the shock absorber and generates a damping strut resistance force. A biasing means for biasing the valve disk against a through flow direction of the disk valve has a force-distance-characteristic curve in a range of the valve stroke of the valve disk, a first derivative of which is substantially zero and has a value (K). A bias regulator couples the biasing means with the valve disk and is interconnected with the retract detection device. When the retraction of the shock absorber starts, the value (K) is raised during a first period of time starting at a single start value.