66results about How to "Increased computational burden" patented technology

The present invention relates to a device and method for monitoring for sleep disordered breathing or other types of disordered breathing such as Cheyne-Stokes breathing. More specifically, a device and method for detecting disordered breathing is provided that monitors a physiological parameter, which becomes cyclical due to apnea-hyperpnea (or arousal) alternation and provides the basis for the determination of a number of breathing disorder metrics.

An application contacts the Application Specific Integrated Circuit (ASIC) with a request for a job, along with the name or identifier of a data stream to pattern match against, the name or identifier of the pattern set to use, and whether the job is partial or full. Depending on the priority rules set by the ASIC administrator, the ASIC may stop the job it is currently doing and begin work on the new job, or wait until the current job is finished before starting the new job. The ASIC determines if the pattern set for the new job is already stored in the cache, and contacts the calling application if it is not. Once the correct pattern set is loaded, the ASIC begins pattern matching on the requested data stream. The data stream is compared byte by byte with the each of the patterns in the loaded set. The ASIC will return a match to the calling application if a match has been made with one of the patterns in the pattern set.

In a virtualized computer system, a network frame is transmitted from a virtual machine using a network interface device, possibly through a virtual switch, by copying only a part of the network frame to the transmit buffers that have pre-translated mappings from guest physical addresses to hypervisor virtual addresses and to machine addresses. The length of the part of the network frame that is copied to the transmit buffers may be variable.

A method and system tracks models and predict object movement in an environment. Sequences of temporally and spatially adjacent events sensed by the set of sensors are linked to form a set of tracklets. Each tracklet has an associated starting and terminating location. The tracklets are used to construct a directed graph including starting nodes, terminating nodes, and, intermediate nodes connected by edges. The intermediate nodes can be split nodes where tracklets diverge onto different tracks, and join nodes where multiple tracklets converge onto a single path. Probabilities are assigned to the edges to model and predict movement of the objects in the environment.

This invention deals with an advanced Real-time Grid Monitoring System (RTGMS) suitable for both single-phase and three-phase electric power systems. This invention provides an essential signal processing block to be used as a part of complex systems either focused on supervising and diagnosing power systems or devoted to control power processors interacting with the grid. This invention is based on a new algorithm very suitable for real-time characterization of the grid variables under distorted and unbalanced grid conditions. The main characteristic of this invention is the usage of a frequency-locked loop, based on detecting the grid frequency, for synchronizing to the grid variables. It results in a very robust system response in relation to existing technique based on the phase-angle detection since grid frequency is much more stable variable than the grid voltage / current phase-angle, mainly during grid faults. Moreover, the algorithm supporting this invention is very efficient and can be implemented in regular industrial microprocessors. These features make the RTGMS object of this invention ideal to be applied in the control of distributed generation systems (DGS), flexible AC transmission systems (FACTS), power quality conditioners (PQC) and uninterruptible power supplies (UPS). In all these systems, the fast and precise real time detection of the voltage and / or current sequence components under grid fault conditions is a crucial matter.

A GPS-aided inertial navigation method includes providing multiple sensors including multiple inertial measurement units (IMUs) and at least one global positioning system receivers and antennas (GPSs) and computer with embedded navigation software. The computer interfaces with all IMUs and all GPS receivers; running, in parallel, in multiple standard inertial navigation (IN) schemes; computes the mean of all the INSs to obtain a fused IN solution for the IMUs' mean location; computes the mean of all the GPS solutions to obtain a fused GPS solution for the GPS antennas' mean location; applies a lever-arm correction, with the vector from the mean IMU location to the ‘mean antenna’ location, to the fused GPS solution; feeds the fused IN solution and the lever-arm corrected fused GPS solution to a single navigation filter, as if there were a single IMU and a single GPS; and runs an IMU / IN / GPS correction module.

The invention relates to a scene reduction-based intelligent power grid optimal scheduling method containing wind power and demand side resources, which comprises the following steps of: 1, predictingthe output power of a wind power plant on the next day, modeling a wind power prediction error, and randomly generating a plurality of initial scenes containing wind power output; step 2, performingscene reduction on a plurality of initial scenes containing wind power output randomly generated in the step 1 so as to generate a classic scene set; step 3, establishing an optimal scheduling model of the virtual power plant and the traditional unit considering uncertainty by taking minimization of the scheduling cost of the power system as a target; and 4, calculating the minimum value of the target function of the optimal scheduling model, and carrying out optimal configuration on the virtual electric field. According to the method, energy gathered by the virtual power plant can be effectively combined, fluctuation and uncontrollability of new energy generated output can be reduced during internal optimal scheduling, distributed power sources and loads are cooperatively managed, and safe and stable operation of a power grid is promoted.

A fluorescence optical tomography system and method uses a photon migration model calculator for which absorption and reduced scattering coefficient values are determined for each source / detector pair. The coefficient values may be determined by measurement, in which a time resolved detector detects the excitation wavelength and generates temporal point spread functions from which the coefficient values are found. Alternatively, the coefficient values may be determined by calculating them from a dataset containing a spatial distribution of absorption and reduced scattering coefficients in a volume of interest. The fluorescence detection may be continuous wave, time resolved, or a combination of the two. An estimator uses a detected fluorescence signal and an estimated fluorescence signal to estimate the image values.

Disclosed is a PTZ (pan / tilt / zoom) camera focusing method and system. The method includes the steps of according to multiple focal length sampling points, multiple object distance sampling points and focal values of the focal length and object distance sampling points, acquiring a value b of a current focal length, b = y - Kx(f), with x(f) referring to the focal value x changing with change of the focal length f, y to an image distance, and K to a constant; according to the image distance y of the current focal length and the value b of the current focal length, calculating the focal value of the current focal length. The technical problem that the prior method of controlling the focal position of a camera by transmitting the focal value applies only to parfocal lens cameras and applies to no verifocal lens cameras is solved. In use of the PTZ camera focusing method and system in focusing, the cameras with two types of lenses both can accurately focus a tracked target to acquire clear target images.

The invention discloses a choosing method for a multi-point positioning location solution in the complex scene environment. The choosing method is mainly in charge of calculation of TDOA of a multi-point positioning system in the complex and actual scene environment to the target positioning location and the self-inspection output function of the positioning location. According to the main principle, follow-up processing and choosing operation are conducted on a positioning result by judging whether a chan's multi-point positioning algorithm two-step location estimation residual error sample conforms to probability distribution in the normal noise level or not; if yes, the current positioning result is directly output; if not, all the station points are removed sequentially, other m-1 station points are reserved, and positioning is conducted m times; a positioning combination with the maximum occurrence probability of the two-step location estimation residual error sample is selected; if the probability meets the preset threshold, a corresponding positioning solution is output; if the probability does not meet the preset threshold, the solution is removed. According to the choosing method for the multi-point positioning location solution in the complex scene environment, correlation of two location estimation values is taken into account, the calculation quantity is small, no other prior information is needed, universalization and simplification are facilitated, and the requirement of multi-point positioning engineering application in the complex scene environment can be met.

A method for motion estimation with respect to a sequence of images. Based on predictor vectors respective updates are generated. The updates are distributed over a plurality of tables. Only a single table of updates is applied to a given predictor vector to generate a limited set of candidate vectors only.

The invention discloses a control method for suppressing rectification start impact current of a three-phase LCL type grid connection converter. The control method also enables a system to have relatively good stability in the presence of a weak electric grid. The control method comprises the steps of detecting an AC side filtering capacitor voltage to serve as a synchronous voltage of a decoupled bisynchronous phase-locked loop; outputting a d-axis fundamental wave positive-sequence component of the filtering capacitor voltage by the decoupled bisynchronous phase-locked loop, and regarding the d-axis fundamental wave positive-sequence component and the filtering capacitor voltage as a feed-forward component; and adding the feed-forward component into a current loop of the grid connection converter. The start control performance f the LCL type grid connection converter is accordingly improved, and the system also can keep relatively strong robustness in the presence of the weak electric grid. On the basis of the traditional three-phase LCL type grid connection converter current control method, the control method for suppressing the rectification start impact current of the three-phase LCL type grid connection converter does not add the sampling amount, the hardware cost and the computational burden of the system.