2267results about How to "Reduce uncertainty" patented technology

A mobile communications device initiates a handoff from its current base station (BS) sector network attachment point to a new BS sector. The mobile sends a handoff request over its current wireless link to the current BS sector, which forwards the request to the new BS sector, e.g., via a network link. The new BS sector processes the request assigning dedicated resources, e.g., an identifier and dedicated uplink segments. Information identifying the allocated resources is conveyed from the new BS sector via the current BS sector to the mobile. The mobile determines the time of the allocated dedicated segments based upon a received beacon signal from the new BS sector with known timing relationships to dedicated segments. The mobile breaks the original wireless link just prior to the time of the first assigned dedicated segment. The mobile communicates information on the assigned dedicated segments to perform registration operations, e.g., timing synchronization and power control, establishing a new wireless link.

A pointing method uses eye-gaze as an implicit control channel. A user looks in a natural fashion at a target object as a button on a graphical user interface and then presses a manual selection key. Once the selection key is pressed, the present method uses probability analysis to determine a most probable target object and to highlight it. If the highlighted object is the target object, the user can select it by pressing a key such as the selection key once again. If the highlighted object is not the target object, the user can select another target object using additional keys to navigate to the intended target object.

A mobile communications device initiates a handoff from its current base station (BS) sector network attachment point to a new BS sector. The mobile sends a handoff request over its current wireless link to the current BS sector, which forwards the request to the new BS sector, e.g., via a network link. The new BS sector processes the request assigning dedicated resources, e.g., an identifier and dedicated uplink segments. Information identifying the allocated resources is conveyed from the new BS sector via the current BS sector to the mobile. The mobile determines the time of the allocated dedicated segments based upon a received beacon signal from the new BS sector with known timing relationships to dedicated segments. The mobile breaks the original wireless link just prior to the time of the first assigned dedicated segment. The mobile communicates information on the assigned dedicated segments to perform registration operations, e.g., timing synchronization and power control, establishing a new wireless link.

A method and apparatus (system) for providing forward-link channel-frequency allocation for multiple-satellite cellular communications networks is disclosed. The system has a centralized ground-operations control center that provides bi-weekly minute-by-minute allocation plans for geographically-defined service areas. This enables each service area to set its diversity policy in accordance with the requirements of the government regulators and customer preferences within the service area. The system has a user model having a frequency re-use pattern, a channel allocation model for modelling the power allocated to each channel, and a gateway channel model for allocating channels in accordance with the user model and the channel allocation model. The allocation is made for each satellite of the plurality of satellites. The traffic allocation induces an operating frequency for each of the one or more links in each satellite of the plurality of satellites. The satellite communication system computed frequency allocation is optimized to minimize total radiation from all forward links for one or more of the plurality of satellites.

A method for estimating and / or reducing uncertainty in reservoir models of potential petroleum reservoirs comprises receiving the results of a stochastic seismic inversion, and transforming the inversion data into a form suitable for reservoir modelling and flow simulations, while honoring inter-property and inter-layer correlations in the inversion data as well as measured well data and other geological constraints.

The present invention relates to the design of an essentially digital system. As one example of digital systems, these may perform real-time transformations on time discrete digitized samples of analogue quantities. An example of such a system is a digital communication system. The transformations on the data can be specified in a programming language and executed on a processor such as a programmable processor or directly on application specific hardware. In accordance with the present invention the digital system is described as a set of threads in a description language. Alternative names for a thread are tasks and processes. The set of threads defines a representation or model of the digital system. In accordance with the present invention, the representation or model is preferably executable at each stage of the design independent of the current level of abstraction of that representation or model. With description language is meant a programming language. In accordance with the present invention each of the threads has a variable having an assignable value which represents the “local time” of said thread, i.e. a time associated only with that thread, which can be used for sequencing the processing of that thread with respect to other threads. With the word “local” is meant that the time is an attribute of the thread only. In accordance with the present invention a means is provided for the designer to assign a delay to each thread or operation within a thread, this delay representing for instance the processing time for the respective operation or thread on a processing engine, e.g. a computer. By this means, not only can the processing of threads be scheduled but also the designer may assign a value representative of an elapsed time for the processing of a thread or operation on a processing engine. In addition, the threads may be refined concurrently, while still keeping their local time so that after the refining process the new representation of the digital system is executable, i.e. the processing of the refined threads can be scheduled without divergence from the specification.

The invention discloses a petroleum wellhead annular space sealing device. The petroleum wellhead annular sealing device is used for sealing an annular space between a wellhead sealing body and a petroleum pipe, at least one annular groove is formed in the inner wall surface of the sealing body, and the sealing body is provided with an injection hole which is communicated to a centrifugal end of the annular groove; the petroleum wellhead annular space sealing device further comprises a sealing ring, a power ring, and an injection component, wherein the sealing ring is embedded into the annular groove, the sealing ring is used for sealing the groove in the radial direction by being jointed to the wall surface of the annular groove, and is used for sealing the annular space by being jointed to the outer wall of the petroleum pipe, the power ring is installed in the annular groove and is located between the groove bottom of the annular groove and the sealing ring, and the injection component is installed in an inlet of the injection hole, and is used for injecting fluid with given pressure so as to make the power ring push the sealing ring to tightly press the petroleum pipe. In the petroleum wellhead annular space sealing device, the requirement for deformation capability of a sealing part is low, and meanwhile the sealing capability can be effectively improved.

A method and apparatus (system) for providing forward-link channel-frequency allocation for multiple-satellite cellular communications networks is disclosed. The system has a centralized ground-operations control center that provides bi-weekly minute-by-minute allocation plans for geographically-defined service areas. This enables each service area to set its diversity policy in accordance with the requirements of the government regulators and customer preferences within the service area. The system has a user model having a frequency re-use pattern, a channel allocation model for modelling the power allocated to each channel, and a gateway channel model for allocating channels in accordance with the user model and the channel allocation model. The allocation is made for each satellite of the plurality of satellites. The traffic allocation induces an operating frequency for each of the one or more links in each satellite of the plurality of satellites. The satellite communication system computed frequency allocation is optimized to minimize total radiation from all forward links for one or more of the plurality of satellites.

The invention comprises a method and apparatus for reducing uncertainty in timing on the network. The uncertainty in receive buffers is removed by time stamping the arriving packets before sending the packets to the receive buffer. The uncertainty in the transmission buffer is removed by giving the packets a timestamp in the future, and holding the packets until precisely that time. Time precision is ensured by only releasing time packets at the host physical layer to network boundary at the time specified within the packet.

A method of matching image features with reference features comprises the steps of providing a current image, providing a set of reference features, wherein each of the reference features comprises at least one first parameter which is at least partially indicative of a position and / or orientation of the reference feature with respect to a global coordinate system, wherein the global coordinate system is an earth coordinate system or an object coordinate system, or at least partially indicative of a position of the reference feature with respect to an altitude, detecting at least one feature in the current image in a feature detection process, associating with the detected feature at least one second parameter which is at least partially indicative of a position and / or orientation of the detected feature, or which is at least partially indicative of a position of the detected feature with respect to an altitude, and matching the detected feature with a reference feature by determining a similarity measure.

Locating and / or marking equipment, such as a locate transmitter or locate receiver, a marking device, or a combined locate and marking device, may be communicatively coupled to and / or equipped with a mobile / portable device (e.g., a mobile phone, personal digital assistant or other portable computing device) that provides processing, electronic storage, electronic display, user interface, communication facilities and / or other functionality (e.g., GPS-enabled functionality) for the equipment. A mobile / portable device may be mechanically and / or electronically coupled to the equipment, and may be programmed so as to log and generate electronic records of various information germane to a locate and / or marking operation (e.g., locate information, marking information, and / or landmark information). Such records may be formatted in various manners, processed and / or analyzed on the mobile / portable device, and / or transmitted to another device (e.g., a remote computer / server) for storage, processing and / or analysis. The mobile / portable device also may provide redundant, shared and / or backup functionality for the equipment to enhance robustness.

An electronic circuit includes a primary magnetoresistance element for providing a first output signal proportional to a magnetic field. The primary magnetoresistance element has a primary maximum response axis. The primary magnetoresistance element also has a hysteresis characteristic. The electronic circuit also includes a reset conductor disposed proximate to the magnetoresistance element. The electronic circuit also includes a secondary magnetic field sensing element for providing a second output signal proportional to a magnetic field. The secondary magnetic field sensing element has a secondary maximum response axis, which, in some embodiments, is substantially perpendicular to the primary maximum response axis. In operation, the primary magnetoresistance is reset in accordance with an excessive magnetic field sensed by the secondary magnetic field sensing element.

This disclosure presents a non-contact precision optical device, including methods for measuring distances to an arbitrary target and various configuration geometries, for using polarization maintaining (PM) optical fiber components in a polarization diplexing scheme to construct a version of a dual chirp coherent laser radar that is immune to environmental effects.

A target device's location is estimated by a location estimation module (LEM) that comprises a probabilistic model (PM) for a plurality of sample points, each of which comprises a sample location and an expected distribution of signal values at that sample point. The location estimation module (LEM) makes a sequence (OS) of observations on, n=1, 2, 3 . . . , of signal values. Each observation corresponds to a respective location qn along the target device's path. The sequence of observations and the respective location constitute a hidden Markov model. The module estimates the target device's location qn based on the probabilistic model (PM) and the sequence of observations, wherein the sequence of observations comprises one or more future observations on+m for which m is a positive integer. In other words, the target device's location is estimated, at least partially, based on knowledge of its future.

The invention discloses a text orientation analysis method which comprises the following steps of: preprocessing a review text; identifying a dependency relation structure of the Chinese syntax; calculating content polarity values of sentiment words; completing two-tuples extraction of evaluated objects and evaluation words and determining a slave relation between the evaluated objects; weighting and summing orientation values of the sentiment words to obtain an orientation value of a sentence so as to implement discrimination on orientation of a sentence level; discriminating appraising orientation of sentiment in the review by positive and negative polarity values of the sentence level; and according to the size of a polarity absolute value, discriminating intensity of appraising sentiment in the review. A product review orientation discriminator comprises an acquisition module, a preprocessing module, a syntactic analysis module, a sentiment calculating engine, a two-tuples mining engine, a content controller and a sentiment discriminator. According to the invention, a combined sentiment dictionary is combined and a domain ontology is added into text orientation analysis; accuracy of polarity calculation of the sentiment words and (the evaluated objects and the evaluation words) two-tuples extraction is improved; and orientation analysis on product reviews in a forum is implemented.

The invention discloses an image subtitle generation method and system fusing visual attention and semantic attention. The method comprises the steps of extracting an image feature from each image tobe subjected to subtitle generation through a convolutional neural network to obtain an image feature set; building an LSTM model, and transmitting a previously labeled text description correspondingto each image to be subjected to subtitle generation into the LSTM model to obtain time sequence information; in combination with the image feature set and the time sequence information, generating avisual attention model; in combination with the image feature set, the time sequence information and words of a previous time sequence, generating a semantic attention model; according to the visual attention model and the semantic attention model, generating an automatic balance policy model; according to the image feature set and a text corresponding to the image to be subjected to subtitle generation, building a gLSTM model; according to the gLSTM model and the automatic balance policy model, generating words corresponding to the image to be subjected to subtitle generation by utilizing anMLP (multilayer perceptron) model; and performing serial combination on all the obtained words to generate a subtitle.

A methodology for automatic a priori data pattern analysis is provided. Described methods allow consistent and objective determination of outliers; trend; seasonality; and level shifts; and the production of better models and more accurate forecasts. In addition, a two-step way to automatically determine seasonality and locate possible events in the data set is described. Decomposition of data into seasonal, trend and level components; detection of outliers and level-shift events in the time series based on statistical analysis of the time series; detection of seasonality based on statistical analysis of clusters of data, known as cluster-based seasonality analysis, or CBSA; evaluation of the goodness of fit of a model to data, using the existing goodness of fit indicator, R2; and seasonality analysis, using a sequence of cluster-based seasonality analysis (CBSA) and Fourier analysis are described.

This disclosure presents a non-contact precision optical device, including methods for measuring distances to an arbitrary target and various configuration geometries, for using polarization maintaining (PM) optical fiber components in a polarization diplexing scheme to construct a version of a dual chirp coherent laser radar that is immune to environmental effects.

Parametric Bayesian Updating method is described for attribute importance measures. AIM is a quantitative measure of the relative importance of multiple attributes used in a Bayesian Updating parametric multivariate modeling approach. The AIM is a function of the correlation coefficients between the attributes themselves and the attributes with collocated target variable. The importance calculation is straightforward, repeatable, and objective.

A software application is provided designed to encourage collaboration between professional disciplines related to land development and construction projects. A graphical risk analysis system is provided based on answers to interdisciplinary questions related to risks. Use of the system promotes a complete checklist of interdisciplinary and informational consultation which, when completed, reduces the risk related to land development.

The invention discloses a multi-field coupling true triaxial test system and an experiment method implemented by the same. The multi-field coupling true triaxial test system is characterized by comprising a true triaxial double-cavity pressure chamber (1), an axial loading system (2), a confining pressure / back pressure loading system (3), a temperature control system (4), a permeation control system (5), a gas loading system (6), a bending element experiment system (7) and a computer (8). The multi-field coupling true triaxial test system and the experiment method have the advantages that stress fields and seepage fields are controlled, and accordingly simulation research can be carried out on seepage anisotropy of rock and soil mass; influence of environmental factors on freezing nucleusor frozen soil samples can be simulated under the effects of temperature fields, the seepage fields and the stress fields; research can be carried out on the physical and mechanical properties of unsaturated frozen soil under the effects of the temperature fields and the stress fields; simulation research can be carried out on change of the physical and earth properties of sediments in generationand decomposition procedures of natural hydrates under multi-field coupling conditions, and simulation research can be carried out on mutual displacement effects between hydrate gas in the sediments and underground water; simulation research can be carried out on the physical and mechanical properties of unsaturated soil under the multi-field coupling conditions.

A method is disclosed for determining improved estimates of properties of a model, on the basis of estimated prior constraints, by running a mathematical inversion several times using the output posterior estimate of the previous inversion, or any of the previous inversions to provide an input for the next inversion. This iterative inversion may be repeated until the prior and posterior estimates converge to within a given threshold. The method may be applied to seismic data, using a seismic inversion, in order to improve the prediction of the viability of potential petroleum reservoirs by determining improved estimates of volumetric properties of a subsurface region.

Method for measuring weekly and annual emissions of a greenhouse gas generated over a determined geographical area and measuring system implementing the method.

A system for positioning an interchangeable tool in a body cavity that includes a channel having a lumen in direct communication with the body cavity; a tool introducer having a longitudinal axis and a distal end and wherein the tool introducer is capable of traveling through the channel lumen; and a tool holder covering at least a portion of the interchangeable tool wherein the tool holder is pivotally connected to the tool introducer distal end, thereby allowing angular positioning of the interchangeable tool after the tool holder emerges from the channel into the body cavity. A method for engaging an interchangeable tool with a distal portion of a tool manipulator in a body cavity that includes inserting a tool introducer into a channel, the channel having a lumen providing direct communication into the body cavity and wherein a proximal end of the interchangeable tool is reversibly connected to a distal end of the tool introducer; orienting the distal portion of the tool manipulator in the body cavity; emerging the interchangeable tool from the channel into the body cavity; and positioning the interchangeable tool eccentrically to the lumen of the channel wherein the inner passage of the interchangeable tool is angled towards the distal portion of the tool manipulator.

A method of optically measuring a three-dimensional surface by sequentially projecting predetermined patterns onto the surface to generate thereon a predetermined number of temporary images of different intensities. Each of the images is recorded by sensors of at least two matrix cameras and grey values are determined in a pixel by pixel manner of those images. A first approximation value is determined for calculating a first measuring point on the surface, and coordinates of this approximation value are associated on the sensor surfaces of both camera. The grey values of the images of each camera at the positions of the projected points are determined by subpixel interpolation, and a pair of grey scale gradation is detected therefrom. These steps may be repeated until a measuring point is determined by a pair of grey scale gradations analyzed to be similar.

An improved method of, and apparatus for, nuclear imaging takes advantage of the ability to determine the depth of gamma ray / electron interaction within a semiconducting gamma ray detector to determine the (most highly probable) location of the first gamma ray / electron interaction within the detector. Lines of interaction constructed between opposing detector arrays, extending between the location of the first gamma ray / electron interaction in each detector associated with the coincident detection of gamma radiation, permits a positron-emitting object of interest to be imaged according to protocols known in the art, but with better spatial resolution than previously believed to have been known.

Methods and apparatuses are described for creating and using full-kit tasks, monitoring the progress of full-kit tasks, determining full-kit dates, checking compliance of release conditions associated with full-kit tasks, and / or computing and reporting full-kit task delays. A full-kit task can be used in the project plan to represent the preparations that are required or recommended to be performed before executing a set of tasks. The full-kit task can be a zero-duration task that has a full-kit date and that includes a list of items which need to be completed by the full-kit date. The full-kit task is capable of being in one of the following states: not started, in progress, released, and completed. In some embodiments, the set of tasks associated with the full-kit task can only be started if the full-kit task is either in the released state or the completed state.

A system and method are disclosed for deploying an elongated unit in a body cavity, for introducing an interchangeable tool to a slender shaft having a distal end. The system comprising: an elongated unit comprising a longitudinal axis and a distal portion arranged to protrude through a first port into the body cavity. At least one maneuvering unit connected to the elongated unit for maneuvering the distal portion of the elongated unit in a 3D coordinate system to a determined depth and orientation in the body cavity. The at least one maneuvering unit is arranged to selectively deploy the distal portion of the elongated unit at the determined depth and orientation at a distance with respect to the distal end of the slender shaft and selectively align the longitudinal axis thereof with a longitudinal axis of the slender shaft. The elongated unit and / or the slender shaft is arranged advanceable relative each other, such that once the distal portion of the elongated unit is deployed the distal portion of the elongated unit reaches and / or captures the distal end of the slender shaft.