1059results about How to "Lighten the computational burden" patented technology

Various methods for improving the use of model based prediction of future blood glucose control in a patient having diabetes are described. A system for processing diabetes related information, including glucose information, for accurately predicting future glucose levels as a function of glucose data, carbohydrate intake, insulin delivery history and exercise history and then providing recommendations related to the predicted future glucose levels, is also described.

Systems and methods are described for effectively managing the quality of service provided to subscribers in a shared network on a per-application, per-user basis. A system QoS proxy, sitting on a subscriber's computing device or on a web content server, captures network calls made by an application for a subscriber and uses locally stored quality profiles to determine if a request for high-quality communications should be made. If so, the QoS proxy requests QoS from a central application manager, which dedicates a high-quality communications session to the subscriber's application, and causes the subscriber to be billed appropriately.

The invention provides a system for measuring respiratory rate (RR) from a patient. The system includes an impedance pneumography (IP) sensor, connected to at least two electrodes, and a processing system that receives and processes signals from the electrodes to measure an IP signal. A motion sensor (e.g. an accelerometer) measures at least one motion signal (e.g. an ACC waveform) describing movement of a portion of the patient's body to which it is attached. The processing system receives the IP and motion signals, and processes them to determine, respectfully, frequency-domain IP and motion spectra. Both spectra are then collectively processed to remove motion components from the IP spectrum and determine RR. For example, during the processing, an algorithm determines motion frequency components from the frequency-domain motion spectrum, and then using a digital filter removes these, or parameters calculated therefrom, from the IP spectrum.

The invention provides a system for measuring respiratory rate (RR) from a patient. The system includes an impedance pneumography (IP) sensor, connected to at least two electrodes, and a processing system that receives and processes signals from the electrodes to measure an IP signal. A motion sensor (e.g. an accelerometer) measures at least one motion signal (e.g. an ACC waveform) describing movement of a portion of the patient's body to which it is attached. The processing system receives the IP and motion signals, and processes them to determine, respectfully, frequency-domain IP and motion spectra. Both spectra are then collectively processed to remove motion components from the IP spectrum and determine RR. For example, during the processing, an algorithm determines motion frequency components from the frequency-domain motion spectrum, and then using a digital filter removes these, or parameters calculated therefrom, from the IP spectrum.

A method of reducing spatial noise in an image. Low-pass (smoothing) filters are calculated simultaneously from three successive image rows. Three blocks (m1, m2, m3) are associated with the three successive image rows, and the blocks are processed in row-major order. This implementation is applicable to both luminance and chrominance. The number of smoothing parameters is reduced to one. The technique is applicable to both luminance and chrominance. Directional mapping is used. Extension of the technique to spatial filtering using a 5×5 neighborhood (using five successive image rows) is described. Embodiments of the method using the MMX instruction set are described.

A method for diagnosing network performance problems includes providing a graph representing a topology of a network including first nodes that are classified as providers of a resource, second nodes that are classified as consumers of the resource, and third nodes that are classified as mediators intervening between the providers and the consumers. Responsively to a report of a performance problem encountered by a given consumer in the network, at least one input / output (I / O) path is traced through the graph connecting the given consumer to one or more of the providers. One or more problematic nodes are identified along the at least one I / O path as possible causes of the performance problem.

The invention provides a system for measuring respiratory rate (RR) from a patient. The system includes an impedance pneumography (IP) sensor, connected to at least two electrodes, and a processing system that receives and processes signals from the electrodes to measure an IP signal. A motion sensor (e.g. an accelerometer) measures at least one motion signal (e.g. an ACC waveform) describing movement of a portion of the patient's body to which it is attached. The processing system receives the IP and motion signals, and processes them to determine, respectfully, frequency-domain IP and motion spectra. Both spectra are then collectively processed to remove motion components from the IP spectrum and determine RR. For example, during the processing, an algorithm determines motion frequency components from the frequency-domain motion spectrum, and then using a digital filter removes these, or parameters calculated therefrom, from the IP spectrum.

The invention provides a system for measuring respiratory rate (RR) from a patient. The system includes an impedance pneumography (IP) sensor, connected to at least two electrodes, and a processing system that receives and processes signals from the electrodes to measure an IP signal. A motion sensor (e.g. an accelerometer) measures at least one motion signal (e.g. an ACC waveform) describing movement of a portion of the patient's body to which it is attached. The processing system receives the IP and motion signals, and processes them to determine, respectfully, frequency-domain IP and motion spectra. Both spectra are then collectively processed to remove motion components from the IP spectrum and determine RR. For example, during the processing, an algorithm determines motion frequency components from the frequency-domain motion spectrum, and then using a digital filter removes these, or parameters calculated therefrom, from the IP spectrum.

The invention provides a system for measuring respiratory rate (RR) from a patient. The system includes an impedance pneumography (IP) sensor, connected to at least two electrodes, and a processing system that receives and processes signals from the electrodes to measure an IP signal. A motion sensor (e.g. an accelerometer) measures at least one motion signal (e.g. an ACC waveform) describing movement of a portion of the patient's body to which it is attached. The processing system receives the IP and motion signals, and processes them to determine, respectfully, frequency-domain IP and motion spectra. Both spectra are then collectively processed to remove motion components from the IP spectrum and determine RR. For example, during the processing, an algorithm determines motion frequency components from the frequency-domain motion spectrum, and then using a digital filter removes these, or parameters calculated therefrom, from the IP spectrum.

An efficient method for solving a model predictive control problem is described. A large sparse matrix equation is formed based upon the model predictive control problem. The square root of H, Hr, is then formed directly, without first forming H. A square root (LSMroot) of a large sparse matrix of the large sparse matrix equation is then formed using Hr in each of a plurality of iterations of a quadratic programming solver, without first forming the large sparse matrix and without recalculating Hr in each of the plurality of iterations. The solution of the large sparse matrix equation is completed based upon LSMroot.

A method and apparatus for shaping force signals for a force feedback device. A source wave is provided and is defined by a set of control parameters (including a steady state magnitude, a frequency value and a duration value) and modified by a set of impulse parameters (including an impulse magnitude, and a settle time representing a time required for the impulse magnitude to change to the steady-state magnitude). Optionally, application parameters specifying a direction of force signal and trigger parameters specifying activating buttons can also be provided for the source wave. Using a host processor or a local processor, the force signal is formed from the source wave and the sets of control parameters and impulse parameters, where the force signal includes an impulse signal followed by a continual steady-state signal after an expiration of the settle time. A feel sensation is generated to a user of the force feedback device as physical forces produced by actuators on the force feedback device in response to the force signal. The steady-state magnitude value is lower than a magnitude value of a non-impulse-shaped force signal required to create a corresponding feel sensation having a similar apparent sensation to the user.

A method of reducing spatial noise in an image. Low-pass (smoothing) filters are calculated simultaneously from three successive image rows. Three blocks (m1, m2, m3) are associated with the three successive image rows, and the blocks are processed in row-major order. This implementation is applicable to both luminance and chrominance. The number of smoothing parameters is reduced to one. The technique is applicable to both luminance and chrominance. Directional mapping is used. Extension of the technique to spatial filtering using a 5×5 neighborhood (using five successive image rows) is described. Embodiments of the method using the MMX instruction set are described.

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.

An intra prediction apparatus includes: a candidate narrowing-down unit which narrows down, from a plurality of intra prediction directions, an intra prediction direction candidate which is applied to a block of multiple pixels that constitutes a video in accordance with a characteristic of the video; and an intra prediction execution unit which executes intra prediction in the intra prediction direction narrowed down by said candidate narrowing-down unit. Through this, computational load can be lightened while contributing to improvement in picture quality and encoding efficiency.

The invention discloses a nonlinear self-adaption control method of near-space hypersonic vehicle (NHV), which belongs to a flight control method in the technical field of aerospace. The control method mainly comprises three control law parts: a nominal nonlinear generalized predictive control law (NGPC), a B-spline recursive functional linkage network (BRFLN) self-adaption control law, and a robust control law of gain self-adaption adjustment. The invention integrates the simplicity of the NGPC method and the effectiveness of dynamic uncertainty of the BRFLN learning, targets the immeasurable dynamic uncertainty and fast interference of an attitude system in the flight of the NHV, brings favorable learning effect, and realizes the nonlinear accurate control to the attitude angle.

The invention, which belongs to the technical field of unmanned vehicles, relates to a dynamic obstacle avoiding method based on collision detection. A desired vehicle trajectory is constructed by initial planning; according to a received dynamic obstacle prediction trajectory and the desired vehicle trajectory, collision detection is performed; the driving speed and / or path of the vehicle are / isplanned again to obtain collision-free driving speed and / or path data of the vehicle are obtained; and a desired vehicle trajectory is reconstructed to avoid the dynamic obstacle. Therefore, the unmanned vehicle can avoid the dynamic obstacle autonomously. According to the invention, with the collision detection method for the automatic driving vehicle, the high collision detection accuracy is ensured and the collision detection efficiency is improved in a dynamic environment. On the basis of the re-planning method, the high traffic efficiency, the high traffic smoothness and the good trafficsafety effect are considered simultaneously.

A subtractor subtracts an echo canceling signal (Ĉ·y1(n−1)) from a canceling error signal (e(n)) to estimate the resonant noise (d(n)) to be silenced at a position of a microphone, and outputs a first basic signal (x1(n)) representing the estimated resonant noise d(n) as an input signal supplied to a controller. In the controller, a delay filter generates a second basic signal (x′(n)) by delaying the first basic signal (x1(n)) by a time value (Z−n) The controller generates a control signal (x(n)) based on the first basic signal (x(n)) and the second basic signal (x′(n)).

Spatial noise is reduced in an image having a plurality of pixels by detecting object boundaries and unstructured areas in the image and applying 3-tap high pass filters to each pixel in the image in at least four, but less than eight directions to determine the best direction for local low pass filtering. Low pass filtering is applied only along object boundaries and unstructured areas within the image so as to minimize the tendency to blur image edges. Using only four high pass filters to locate horizontal, vertical and diagonal image edges passing through the center of a 3×3 pixel array provides good results.

The invention discloses a clustering method for the in-vehicle Ad hoc network based on the signal strength, and provides a network clustering and maintaining method which starts with the vehicle directional information, and enables the vehicles running along the same direction to participate in the process that the same cluster is formed and maintained. After a node is initialized, tentative cluster-heads are established among the vehicles running along the same direction, neighbor linked lists are formed in the two-hop range of the tentative cluster-heads, the node which has the maximum nodal connection signal strength is a cluster-head node, and other nodes are common nodes or gateway nodes of the cluster; the maintenance process is based on the vehicle directional information and the nodal connection signal strength. As considering the vehicle directional information and the nodal connection strength signal, the invention has the advantages that the in-vehicle Ad hoc network clustering structure is stable by comparing with other methods under the urban traffic environment, the node alternating times and the clustering related control information quantity are less, the problem that the in-vehicle Ad hoc network performance is low under the urban traffic environment is solved, the cluster service life is prolonged, and the network state is improved.

Disclosed are a method, system, program and data structure for implementing a records retention policy by storing selected files for designated lengths of time and then deleting them only when that time has passed. Embodiments of the invention perform this function in an efficient database-free manner. Embodiments of the invention can perform this function by utilizing existing storage directory tree functionality provided by any computer operating system organized under a retention directory coupled with a mechanism for preventing unauthorized deletions of files designated for retention. Expiration of retained files may be managed through directory structure using directory names corresponding to expiration dates determined from identified retention periods for retained files. Files may be further protected from erasure by a kernel mode process which prevents erasure of any files contained in the retention directory.

A computer implemented proximity searcher searches position field information (representing geographical positions) stored in database records, to identify database positions falling within a predetermined search range of a position of interest. The proximity searcher avoids time consuming conventional techniques such as great circle calculations to thereby reduce the computational burden associated with proximity searching, thus achieving time efficient proximity searches to identify candidate geographical positions that are near the position of interest. The proximity searcher identifies the candidate geographical positions within a search range, specified as a proximity parameter, of the position of interest. The proximity parameter and the position field information can have incompatible formats. In one configuration, the proximity searcher resides on a server coupled to a network and responds to user queries provided by, for example, client computers also coupled to the network.

A method for network management includes sending a trap message from a network end switch to client premises equipment (CPE) over a network connection therebetween, informing the CPE of a change in a network management information base (MIB) of the end switch. A request from the CPE to the end switch, subsequent to the trap message, to read information from the MIB, and the information is provided from the end switch to the CPE responsive to the request. The change is determined to have been implemented by the CPE based on the request to read the information. There is thus no need for the CPE to poll the processor for further trap messages.

The present invention relates to a method for enhancing the use of a computer network which is accessed by use of a wireless device. Specifically, one embodiment of the present invention pertains to a method of using server-resident software assistants, programs to assist the wireless device user, to perform a significant amount of the tedious input tasks required when wireless devices such as PDAs attempt to exploit the services available on the Internet. The method provides a mechanism by which software assistants can be programmed to a users' own specific information and ways of performing tasks that exploit Internet services such as purchasing, information searches, event planning and complex scheduling. The task can be organized in structural task lists that interface with a user's stored preferences and PIM information on the portable electronic device.

The invention relates to a map linear symbol drawing method and a map linear symbol drawing system based on a graphics processing unit (GPU). According to the method, under a three-dimensional rendering programmable assembly line system, a shader language is used for sending a function relation between map linear symbol coloring and linear parameters to the GPU for calculation, so that map linear symbols can be drawn with high efficiency. The method comprises the following steps of establishing a vortex array caching object by taking half-linear width as a buffering region according to a linear center line, recording xyz of the position of a vortex and transverse and longitudinal coordinate relation parameters uv of the vortex on the whole buffering zone; writing a vortex shader, sending the uv parameters into a fragment shader, and performing rasterization interpolation by using the GPU; and building a function of a fragment color and the uv in the fragment shader, and calculating pixel coloring. In an actual drawing process, the vortex caching objects are bound to be property parameters for sending; global parameters required in a shader file are set; and therefore, the linear symbols can be drawn.

The communication method and system include wirelessly transmitting a data packet from a first node to a plurality of second nodes to define a wireless multicast transmission. Each second node determines whether the data packet was received with errors and if so transmits a negative acknowledgement (NAK) to the first node in a common allocated NAK time slot for the second nodes. The first node retransmits the data packet to the second nodes based upon receiving the NAK from any second node. The method and system may include measuring propagation delay between the first node and each of the plurality of second nodes, or measuring a maximum propagation delay between the first node and the plurality of second nodes, to determine the common allocated NAK time slot.

A method for utilizing a registration authority to facilitate a certificate signing request is disclosed. In at least one embodiment, a registration authority computer may receive a certificate signing request associated with a token requestor. The registration authority may authenticate the identity of the token requestor and forward the certificate signing request to a certificate authority computer. A token requestor ID and a signed certificate may be provided by the certificate authority computer and forwarded to the token requestor. The token requestor ID may be utilized by the token requestor to generate digital signatures for subsequent token-based transactions.

The invention provides a system for measuring respiratory rate (RR) from a patient. The system includes an impedance pneumography (IP) sensor, connected to at least two electrodes, and a processing system that receives and processes signals from the electrodes to measure an IP signal. A motion sensor (e.g. an accelerometer) measures at least one motion signal (e.g. an ACC waveform) describing movement of a portion of the patient's body to which it is attached. The processing system receives the IP and motion signals, and processes them to determine, respectfully, frequency-domain IP and motion spectra. Both spectra are then collectively processed to remove motion components from the IP spectrum and determine RR. For example, during the processing, an algorithm determines motion frequency components from the frequency-domain motion spectrum, and then using a digital filter removes these, or parameters calculated therefrom, from the IP spectrum.

A data processing system is provided comprising a main processor operable to perform a plurality of data processing tasks, a data engine having a data engine core operable to perform a number of said plurality of data processing tasks on behalf of said main processor and a data stream processing unit providing a data communication path between said main processing unit and said data engine core. The data stream processing unit has a control interface operable to receive from said data engine core at least one command and a data stream controller operable to receive at least one input data stream and to perform at least one operation on said at least one input data stream to generate at least one output data stream comprising a sequence of data elements. The data stream processing unit is responsive to said at least one command from said data engine core to control said data stream controller to perform said at least one operation.