42results about How to "Fast and robust" patented technology

A wireless network is disclosed including at least one base station and a plurality of assigned terminals for exchanging user data and control data. The base station is arranged for transmitting the start time of at least one signaling sequence of at least terminal. For evaluating the signaling sequences transmitted by the terminals, the base station includes a device for correlating a received signaling sequence and for detecting the pulse evolving from a received and correlated signaling sequence. A terminal generates a signaling sequence by folding two code sequences.

A method of creating a super-resolved color image from multiple lower-resolution color images is provided by combining a data fidelity penalty term, a spatial luminance penalty term, a spatial chrominance penalty term, and an inter-color dependencies penalty term to create an overall cost function. The data fidelity penalty term is an L1 norm penalty term to enforce similarities between raw data and a high-resolution image estimate, the spatial luminance penalty term is to encourage sharp edges in a luminance component to the high-resolution image, the spatial chrominance penalty term is to encourage smoothness in a chrominance component of the high-resolution image, and the inter-color dependencies penalty term is to encourage homogeneity of an edge location and orientation in different color bands. A steepest descent optimization is applied to the overall cost function for minimization by applying a derivative to each color band while the other color bands constant.

A method of measuring at least one parameter associated with a portion of a sample having formed thereon one or more structures with at least two zones each having an associated zone reflectance property. The method includes the steps of illuminating the zones with broadband light, and measuring at least one reflectance property of light reflected from the at least two zones. The measurement includes a substantial portion of non-specularly scattered light, thereby increasing the quality of the measurement. The method further includes the step of fitting a parameterized model to the measured reflectance property. The parameterized model mixes the zone reflectance properties of the zones to account for partially coherent light interactions between the two zones.

The disclosure relates to improving plant breeding methods by controlling for microbial diversity present in the plant breeding process.

User input devices (UIDs) for controlling a surgical robotic system are described. A UID can include one or more tracking sensors to generate respective spatial state signals in accordance with a pose of the UID. At least one of the tracking sensors can be a camera. In the case of multiple tracking sensors, the spatial state signals are processed by a sensor fusion algorithm to generate a more robust, single tracking signal and a quality measure. The tracking signal and the quality measure are then used by a digital control system to control motion of a surgical robotic system actuator that is associated with the UID. Other embodiments are also described and claimed.

A method for segmenting an object in a digital image includes computing, for each point v_i in the image, weights w_ijk of a curvature clique v_iv_iv_k for each successive pair of edges e_ij, e_ik incident on point v_i, decomposing each curvature clique into pairwise edge weights to form a new set of edges by adding, for all points v_j, v_k, an edge e_ij with weight w_ij, an edge e_ik with weight w_ik, and an edge e_jk with weight w_jk, where weight w_ij equals weight w_ik equals ½ w_ijk, and weight w_jk equals −½ w_ijk, computing an indicator function of the points of the image indicative of whether each point belongs to an object of interest by minimizing a functional of the indicator function, and segmenting the object of interest from the image based on the value of the indicator function x at each image point.

A method of local feature identification, comprising the steps of:

• • retrieving data representing a lightfield (101);
  • forming an epipolar volume (V) from the retrieved data;
  • applying a transform to epipolar planes retrieved from said epipolar volume, so as to represent said epipolar planes in a new space (106);
  • identifying a plurality of epipolar lines (107);
  • identifying local features (fp) based on at least some of said epipolar lines (108).

A multimodal remote sensing image matching method and system integrate different local feature descriptors for automatic matching of multimodal remote sensing images. First, a local feature descriptor, such as the Histogram of Oriented Gradient (HOG), the local self-similarity (LSS), or the Speeded-Up Robust Feature (SURF), is extracted for each pixel of an image to form a pixel-wise feature representation map. Then, the three-dimensional Fourier transform (namely 3D FFT) is used to establish a fast matching similarity metric in a frequency domain based on the feature representation map, followed by a template matching scheme to achieve control points (CP) between images. In addition, the novel pixel-wise feature representation technique named channel features of orientated gradients (CFOG), which outperforms the pixel-wise feature representation methods based on the traditional local descriptors (e.g., HOG, LSS and SURF) in both matching performance and computational efficiency.

An image search method that is robust and fast (with computational complexity of logarithmic order relative to the number of models). The image search includes extracting a plurality of regions from one or more model images and normalizing the regions as standard regions; setting a specific region in each normalized standard region and classifying the plurality of standard regions under two or more subsets on the basis of a feature of the specific region; iteratively performing an operation of setting another specific region at a location different from that of the aforementioned specific region in each standard region classified in each subset and classifying the plurality of standard regions under still more subsets on the basis of a feature of the other specific region; and outputting the locations of the specific regions in the standard regions in the respective classifications and the features of the specific regions in the classifications.

The invention provides novel methods and kits for isolating nucleic acids from biological samples, including cell-free DNA and/or cell-free DNA and nucleic acids including at least RNA from microvesicles, and for extracting nucleic acids from the microvesicles and/or from the biological samples.

A sheet feeding unit that can be incorporated in an image forming apparatus includes an endless belt and a charging member. The charging member charges the endless belt with an alternating voltage to attract a sheet to separate from multiple sheets and feed the sheet, and has an electrode contacting the endless belt at an angle thereto and between which a nip is formed. The endless belt and an interior surface of the charging member define a space across which electric discharge is performed to charge an outer layer of the endless belt. A distance of the gap and a length of the nip in the sheet conveyance direction define a basic charging region. The distance of the basic charging region is smaller than a distance of a unit charging region where the electric charge of identical polarity is held on the endless belt.

The invention discloses a least square migration imaging method and device based on an L-BFGS algorithm. The method comprises steps of performing reverse time migration imaging according to an acoustic velocity model of a target exploration area and a common shot point record of the acoustic velocity model to obtain the initial imaging result; calculating record residual errors of the synthetic seismic record and the original observation record of the target exploration area according to the initial imaging result; calculating the gradient of a target functional relative to the initial imagingresult according to the record residual error; obtaining the second imaging result through an L-BFGS algorithm according to the initial imaging result and the gradient of the target functional with respect to the initial imaging result; and judging whether the record residual error and the calculation frequency of the L-BFGS algorithm meet a preset termination condition or not. The method is advantaged in that the optimal solution method of the L-BFGS is introduced, so the optimization process is prevented from falling into local optimization in the solving process of a nonlinear optimizationproblem, and the optimization process in the aspect of nonlinear optimization is more stable.

A patient table (1) usable in an X-ray image acquisition arrangement (100) is proposed. The patient table (1) comprises a table plate (3) being connected to a table base (5) via at least one movable joint (9), wherein the table plate (3) is movable using at least one actuator (11). In order to set or re-establish an accurate position/orientation of the movable table plate (3), the patient table comprises a positioning system including a first sensor arrangement (15) for providing position data of the at least one movable joint (9) and a second sensor arrangement (17) for providing position data of the table plate (3), e.g. by tracking at least one marker (21) attached to the table plate (3). Using such patient table (1) may allow for accurately automatically positioning the table plate (3). Furthermore, the accurate position data provided by the second sensor arrangement (17) may be used in a method for improved three-dimensional roadmapping.

The invention relates to operating an optical drive apparatus from parameters read from an associated record carrier. Data-aided adaptation loops are often used in modern communication and storage systems. To ensure fast and robust start-up by ensuring a stable starting point in an adaptation loop and a fast convergence of the adaptation loop, an information data field is provided on, and read from by the drive, an associated optical record carrier. The information data field comprising start-up parameters, the start-up parameters comprising information about recommended write parameters and information related to a resulting channel response for the case when the recommended write parameters are used. In a start-up situation of the optical drive apparatus, the channel response of the bit detector is computed based on the start-up parameters.

The present invention relates to a method of and a system for optically connecting an optical fiber sensor (12) to an optical shape sensing console (21). The optical shape sensing console (21) has a number of single optical channels (C1, C2, C3). The optical fiber sensor (12) has a number of single fiber cores (A1, A2, A3) angularly spaced with respect to one another around a longitudinal center axis of the fiber sensor (12) and a fiber sensor connection end (30) for connection to an optical coupler (32; 38) connected to the shape sensing console (21). The optical coupler (32; 38) has the optical channels (C1, C2, C3) arranged for optical connection with the fiber cores (A1, A2, A3). A number of single calibration data sets indicative of individual optical properties of the single fiber cores (A1, A2, A3) is assigned to the single optical channels (C1, C2, C3). The fiber sensor connection end (30) is connected to the optical coupler (32; 38) such that a first fiber core (A2) of the fiber cores (A1, A2, A3) is in optical communication with a first optical channel (C1) of the optical channels (C1, C2, C3). An optical response of the first fiber core (A2) is measured by optically interrogating the first fiber core (A2) while a first calibration data set of the calibration data sets is assigned to the first optical channel (C1). The first fiber core (A2) is identified among the fiber cores (A1, A2, A3) of the fiber sensor (12) on the basis of the measured optical response of the first fiber core (A2) and the calibration data sets of the fiber sensor (12). If the first fiber core (A2) is identified as not matching with the first calibration data set used hi measuring the optical response, then a second calibration data set of the calibration data sets, which matches with the identified first fiber core (A2), is reassigned to the first optical channel (C1), or the fiber sensor connection end (30) and/or the optical coupler (32; 38) are repositioned such that a second fiber core (A1) matching with the first calibration data set is in optical communication with the first optical channel (C1).

A system and method perform structure-preserving smoothing (SPS) using a data adaptive method for smoothing 3D post-stacked seismic attributes which reduces random noise while preserving the structure without prior computation of its orientation. The data is smoothed within a neighborhood sub-window along a set of predefined orientations, and the best smoothing result is then selected for output. The orientation corresponding to the best result often approximates the true structure orientation embedded in the data, so that the embedded structure is thus preserved. The SPS method can also be combined with median, alpha-trim, symmetric near neighbor, or edge-preserving filters. The SPS method is an effective way to reduce random noise and eliminate noise footprints, and to enhance coherence and curvature attributes.

A method for quantifying the sensibility of a test microorganism to a concentration of an antimicrobial agent includes: preparing two liquid samples including the microorganism, one having the antimicrobial agent and one without; for each sample acquiring, by a flow cytometer, a digital set values including a fluorescence, forward, or side scatter distribution, and computing: a first coordinate value corresponding to the acquired distribution main mode and an acquired distribution first area for values greater than the first coordinate value, and a second coordinate value, greater than the first, for which an acquired distribution second area between the values equals a first area predefined percentage over 50%; computing a ratio according to:

where Mode(ATB) and QT(ATB) are the first and second coordinate values with the antimicrobial agent concentration, and Mode(no ATB) and QT(no ATB) are respectively the first and second coordinate values without the antimicrobial agent concentration.

A separating and contact assembly into which a sheathed or bundled wire cable may be inserted having separating fins to separate the component wires of the bundle guided through separate channels to terminal contact areas conductively coupled to relay contact areas.

The invention provides novel methods and kits for isolating nucleic acids from biological samples, including cell-free DNA and/or cell-free DNA and nucleic acids including at least RNA from microvesicles, and for extracting nucleic acids from the microvesicles and/or from the biological samples.