559results about How to "Accurate solution" patented technology

The preferred embodiment of the present invention an object oriented wizard creation mechanism provides an environment and set of facilities for creating and modifying wizards. The preferred embodiment wizard creation mechanism provides a WizardWizard mechanism for creating the skeleton of new wizard, a WizardDesigner mechanism for specializing and WizardMetaDataManager mechanism for persisting and retrieving created wizards. The WizardWizard guides the developer through a predetermined series of steps that are required to define a the basic components of a new wizard. The WizardDesigner takes these basic components and guides the developer through a specialization process that further customizes and defines the new wizard. In the preferred embodiment, the WizardWizard and the WizardDesigner create and specialize the target wizard from a component based Wizard framework. The use of the component based Wizard framework with the WizardWizard and WizardDesigner provide a customizable and extensible wizard creation solution to that has utmost functionality and flexibility to the users and developers.

Adaptive rule-based methods to solve localization problems for ad hoc wireless sensor networks are disclosed. A large problem may be solved as a sequence of very small subproblems, each of which is solved by semidefinite programming relaxation of a geometric optimization model. The subproblems may be generated according to a set of sensor / anchor selection rules and a priority list. The methods scale well and provide improved positioning accuracy. A dynamic version may be used for estimating moving sensors locations in a real-time environment. The method may use dynamic distance measurement updates among sensors, and utilizes subproblem solving for static sensor localization. Methods to deploy sensor localization algorithms in clustered distributed environments are also provided, permitting application to arbitrarily large networks. In addition, the methods may be used to solve sensor localizations in 2D or 3D space. A preprocessor may be used for localization of networks without absolute position information.

In an object oriented computer system, an object oriented framework defines an interface mechanism that provides a common interface to a non-object oriented persistent datastore. This common interface can be customized by various types within the framework by effectively hiding attributes on the common interface that are not needed by a particular type. Attributes defined on the common interface may be accessed at any level in the framework through a process of delegation from one level to the next. In addition, one or more of these attributes on the common interface may be defined at various levels, which causes those attributes to be accessed at their respective levels instead of delegating to different levels.

A topology optimization method. Characteristics of a structure to be designed are differentiated to calculate equivalent static loads. A relative fraction of material is adopted as a design variable. It is determined whether or not an element exists based on an objective function and constraints. Design topology is derived through a linear static analysis that processes the equivalent static loads as multiple loading conditions. Topology of the structure to be designed is compared with the design topology, and thereby the progress of optimization is determined. The topology optimization processes are terminated when a difference of the compared result is less than a setup value, and are returned to an initial step when the difference is greater than the setup value, and the equivalent static loads are calculated using the design topology as a new structure to be designed.

A system and methodology / processes for non-kinematic / behavioral mapping to a local area abstraction (LAA) includes a technique for populating an LAA wherein human behavior or other non-strictly-kinematic motion may be present.

The invention discloses a hand movement tracking system and a hand movement tracking method. The invention comprises an attitude and heading reference system based on an accelerometer, a gyroscope and a magnetic sensor, and a hand movement tracking method based on the attitude and heading reference system. The hand movement tracking method comprises the following steps: firstly, obtaining a triaxial acceleration measured by the accelerometer, a triaxial angular velocity measured by the gyroscope and a triaxial magnetic-field component measured by the magnetic sensor, performing error compensation on the magnetic sensor by adopting a least square method to establish an error model after an upper computer receives sensor data, eliminating high-frequency noise of the triaxial acceleration by virtue of a window low-pass filter, and establishing an error model for the gyroscope so as to perform error compensation on random drift of the gyroscope; secondly, effectively integrating the gyroscope, the accelerometer and the magnetic sensor by virtue of an improved adaptive complementary filtering algorithm to obtain an attitude angle and a path angle; and finally, performing gravity compensation and discrete digital integration on acceleration signals to obtain a velocity and a track of a hand movement. The tracking system and the tracking method disclosed by the invention can be applied to a man-machine interactive system, is convenient to operate, and is strong in experience feeling.

The invention discloses a measurement data processing method for pose measurement and adjustment in digital assembly of large-sized parts, comprising the following steps: comparing the current pose of a digital theory model matching assembly part according to actually measured data; and calculating actual optimal target assembly poses according to the current pose. The position of each critical characteristic on the part and corresponding detection points of each assembly detection item are measured by using a laser tracking instrument. Measurement data after processed by the method can provide accurate assembly position and pose data and positioning adjustment parameters for a large-sized part digital flexible assemble system, and the optimal assembly effect of parts is achieved by matching real-time measurement.

A self-contained / interruption-free earth's surface positioning method and system, carried by a user on the earth's surface, includes an inertial measurement unit, a north finder, a velocity producer, an altitude measurement device, a GPS (Global Positioning System) receiver, a data link, a navigation processor, a wireless communication device, and a display device and map database. Output signals of the inertial measurement unit, the velocity producer, altitude measurement device, the GPS receiver, the data link, and the north finder are processed to obtain highly accurate position measurements of the user. The user's position information can be exchanged with other users through the wireless communication device, and the location and surrounding information can be displayed on the display device by accessing a map database with the user position information.

A beacon arranging and image processing method based on UAN (unmanned aerial vehicle) pose calculation comprises the steps as follows: firstly, machine vision guiding landing of an UAN is designed, under the conditions of guarantee of the image sensitivity and analysis of the field distortion, a beacon structure and arranging method required by vision guiding landing is designed according to a built vision imaging system in combination with poses possibly occurring in the landing process, then, three indexes for measuring algorithm applicability are proposed to evaluate and screen pose solution algorithms for different cooperation beacon configurations according to a designed visual guiding system, and finally, adopted ground cooperation beacons are infrared LEDs which have more stable imaging effect, longer imaging distance and higher imaging precision. The method is simple and feasible and has the low landing field configuration requirement, features can be extracted from near infrared images more conveniently and quickly, the application range of the visual system is enlarged, and all-day and all-weather detection and recognition can be realized; the UAN pose information can be solved precisely.

A “Camera Calibrator” provides various techniques for recovering intrinsic camera parameters and distortion characteristics by processing a set of one or more input images. These techniques are based on extracting “Transform Invariant Low-Rank Textures” (TILT) from input images using high-dimensional convex optimization tools for matrix rank minimization and sparse signal recovery. The Camera Calibrator provides a simple, accurate, and flexible method to calibrate intrinsic parameters of a camera even with significant lens distortion, noise, errors, partial occlusions, illumination and viewpoint change, etc. Distortions caused by the camera can then be automatically corrected or removed from images. Calibration is achieved under a wide range of practical scenarios, including using multiple images of a known pattern, multiple images of an unknown pattern, single or multiple images of multiple patterns, etc. Significantly, calibration is achieved without extracting or manually identifying low-level features such as corners or edges from the calibration images.

In an object oriented computer system, a framework mechanism defines a mechanism that separates the ability to complete a process from the results of that process. A task is defined in the framework in terms of a sequence of processes. The framework includes a coupling mechanism for flexibly coupling any of these processes together in any suitable order to define the run-time behavior of the framework without changing the core functions of the framework. The coupling mechanism includes the definition of a processable interface and a processing interface. A particular process generally takes detail information as input and produces detail information that is used in a subsequent process. The detail information input into a process is said to be "processable", and therefore implements the "processable" interface. The detail information output from a process is said to be "processing" detail that is output to the next process, and therefore implements the processing interface. Thus, an object that uses "shippable" detail information as input through its processable interface generates corresponding "shipping" detail information for each shippable detail, which is output to one or more subsequent processes via the processing interface. A particular processable can be associated with any processing interface that supports the processable interface. In other words, any process-related class in the framework can be coupled to any other process-related class, provided one class has a processing interface that corresponds to the processable interface of the subsequent class. In this manner, classes in the framework mechanism can be flexibly coupled together in any suitable order or fashion to accommodate a great variety of different configurations. The framework mechanism therefore provides a high degree of implementation while maintaining the ability to achieve a high degree of customization.

The present invention includes a method for a combined use of a local RTK system and a regional, wide-area, or global differential carrier-phase positioning system (WADGPS) in which disadvantages associated with the RTK and the WADGPS navigation techniques when used separately are avoided. The method includes using a known position of a user receiver that has been stationary or using an RTK system to initialize the floating ambiguity values in the WADGPS system when the user receiver is moving. Thereafter, the refraction-corrected carrier-phase measurements obtained at the user GPS receiver are adjusted by including the corresponding initial floating ambiguity values and the floating ambiguity values are treated as well known (small variance) in subsequent processes to position the user receiver in the WADGPS system.

A frequency domain transforming section 2 transforms mixed signals observed by multiple sensors into mixed signals in the frequency domain, a complex vector generating section 3 generates a complex vector by using the frequency-domain mixed signals, a normalizing section 4 generates a normalized vector excluding frequency dependence of the complex vector, and a clustering section 5 clusters the normalized vectors to generate clusters. Then, a separated signal generating section 6 generates separated signals in the frequency domain by using information about the clusters and a time domain transforming section 7 transforms the separated signals in the frequency domain into separated signals in the time domain.

The invention discloses a method for calculating time-lag electric power system eigenvalues and discriminating stability based on Pade approximation. The method uses Pade approximation to make wide area feedback time-lag approximate to a rational polynomial. Though connecting with an electric power system without time-lag and a wide area damping controller, a linearized model of the time-lag electric power system is established. Finally, part of characteristic roots of the time-lag system is directly obtained according to a system state matrix, and then time-lag stability of the system is determined. According to an eigenvalue calculating result of a four-machine two-region example system, the method can relatively accurately solve part of the eigenvalues and eigenvectors which are corresponding to dynamic elements in the time-lag system. The method can conveniently and accurately determine time-lag stability of the system, correctly solve the number of the eigenvalues which are corresponding to a time-lag link and calculate precision which is related to order of the rational polynomial. In addition, the method is advantaged by small calculated amount, and short calculating time.

The invention discloses a method for quick solution of six-degree-of-freedom humanoid dexterous arm inverse kinematics. The method includes: firstly, setting up a six-degree-of-freedom human arm simulated joint structural model, solving an elbow joint angle and two joint angles of the shoulder joint according to a planar relation formed by the shoulder center, the elbow center, the wrist center and the neck center of the dexterous arm and the tail end position of the dexterous arm, and further solving three joint angles of the wrist joint by the aid of the dexterous arm tail-end posture relation; and calculating position error of a dexterous arm target link to prove effectiveness of the solution of the inverse kinematics by means of a positive kinematic model. Compared with a numerical solving method for robot inverse kinematics, the method for quick solution of six-degree-of-freedom humanoid dexterous arm inverse kinematics is high in precision and quick in speed, and can be used for humanoid dexterous arm operational tasks having high requirements on precision and instantaneity.

The invention relates to a method and a device for acquiring number of multiple targets of a vehicle-mounted millimeter wave radar system. The method and the device belong to the field of vehicle-mounted radars, and are used for solving the problems of inaccurate target detection and missing detection of targets in vehicle-mounted millimeter wave radar multi-target detection. The technical key point of the method comprises the steps of: transmitting periodic FMCW and CW combined waveforms; receiving echo signals, and performing fast Fourier transform on the received echo signals; adopting a frequency clustering algorithm, solving a Doppler frequency matrix of the CW-waveform echo signals, and calculating a relative velocity matrix; and adopting a frequency agglomeration algorithm in FMCW up-down frequency sweeping, acquiring frequency values of up-down frequency sweeping, and calculating a velocity matrix and a distance matrix of targets. The method and the device have the effect that target detection in vehicle-mounted millimeter wave radar multi-target detection is more accurate.

The invention discloses a method for estimating the velocity of transverse waves based on the inversion of an equivalent elastic modulus for self-adapting matrix minerals, which belongs to the field of exploration geophysics, and used for solving the problem that in a conventional method for estimating the velocity of transverse waves based on a Xu-White model, an elastic modulus for matrix minerals is difficult to set accurately. The method comprises the following steps of: (1) setting the Poisson ratio of a dry core sample at a single logging depth point and the value selection range and initial value of an equivalent bulk modulus for matrix minerals; (2) carrying out inversion solution on a same fluid item from two different angles by using two different fluid item calculation methods so as to invert an optimal Poisson ratio of the dry core sample and an optimal equivalent bulk modulus and an optimal equivalent shear modulus for matrix minerals; and (3) estimating the velocity of transverse waves by using a simplified Xu-White model. In the method disclosed by the invention, the equivalent elastic modulus for matrix minerals is taken as an object of study, through reducing the number of target parameters, the precision and reliability of the method for estimating the velocity of transverse waves are effectively improved.

The invention provides a velocity ambiguity resolution method based on MIMO automotive radar. By adopting multichannel Doppler phase compensation, FFT processing is performed on multiple compensated channels, and an optimal channel method is selected according to certain mathematical criterion. The velocity ambiguity problem of TDM MIMO is solved, the range of velocity measurement is increased, the accuracy of angle measurement is guaranteed, and practical value of the technology in the automotive radar direction is greatly extended.

A method of last known position reporting in a device is disclosed. The method generally includes the steps of (A) generating a request signal in an application module of the device, the request signal requesting a current position of the device while a plurality of navigation signals are too weak to calculate the current position, (B) calculating a sequence of known positions in a position module of the device, the known positions being calculated based on the navigation signals with sufficient strength, (C) calculating the current position in the position module in response to the request signal, the current position being calculated based on a last of the known positions and (D) generating a position signal in the position module, the position signal reporting the current position as a valid position to the application module.

In an object oriented computer system, a framework mechanism defines one or more run-time extensible items that may be dynamically reconfigured as required to support different interfaces at run-time. Each extensible item has one or more adapters that correspond to the extensions owned by the extensible item. The extensible item class defines a castTo( ) method. The castTo( ) method is invoked to logically cast an instance of the extensible item class to a desired class so that a selected method on that class can be called. When the castTo( ) method is invoked on an instance of the extensible item class, the extensible item object determines if any of its extensions have an adapter that supports the class specified in the castTo( ) method call. If an adapter does support the specified class, the adapter corresponding is returned, and the selected method is then invoked on the adapter. In this manner, class casting of run-time extensible items is achieved.

In an object oriented computer system, a domain-neutral object is modified with domain-specific run-time extensions to customize the object to a particular domain. A special factory uses the extension identifier to create the domain-neutral object with appropriate extensions in a collection that corresponds to the domain extension. If the special factory is not available, or if a specialized collection associated with the particular extension type has not been previously created, the domain-neutral object with appropriate extensions is created in a default collection. In this manner, an object that is domain-neutral can be customized to a particular domain and created in an appropriate collection for objects of that type.

In an object oriented computer system, one or more run-time extensible items are defined that may be dynamically reconfigured as required to support different interfaces at run-time. The behavior associated with these interfaces is supported by one or more extensions owned by the extensible item. Each extension class has a corresponding method table that is shared among instances of the extension class and that correlates the methods defined on the extension class to method node objects that carry out the method. A method repository is a static object that is created at run-time to correlate extensions to their corresponding method tables. When a client invokes an invokeMethod( ) method on an extensible item, specifying the name of the method to be invoked, the extensible item cycles through its extensions, from newest to oldest, looking for an extension that supports the named method. Each extension examines the method repository to see if the method repository contains a method table corresponding to the extension class. If not, a method table corresponding to the extension class is created and placed in the method repository. When an extension is found that supports the named method, a method node that corresponds to the named method is returned. The method node then invokes the named method on the extension.

In an object oriented computer system, a framework mechanism defines behavior that may be accessed by different processing levels in the framework. A shared policy corresponding to the behavior is defined. A policy usage view is defined that includes one or more methods for accessing attributes required by the shared policy. A view adapter is also defined that provides an implementation for invoking the methods on the policy usage view. When a processing level needs the behavior defined by the shared policy, the methods on the view adapter are invoked, which retrieve the required attributes for the shared policy.

The invention relates to a lower-bound limit analysis method of bearing capacity considering rock translation and rotation effects at the same time, and belongs to the technical field of rock slope stability analysis. According to the method, a rigid block unit is scattered as a geometry system of a rigid rock and a structural plane, the normal force, shearing force and bending moment of the structural plane are used as unknown quantities, a static permission stress field satisfying an equilibrium equation considering the translation and rotation effects of the rigid block unit, structural plane shear yield conditions, structural plane tensile yield conditions, structural plane rotational yield conditions and static boundary conditions is constructed, an overload coefficient is used as a target function, and a lower-bound linear mathematic programming model is built; the linear mathematic programming model is solved by means of an interior point algorithm, a strength reserve coefficient is solved by means of an iterative method at the same time, and the lower-bound solution and corresponding yield area of the overload coefficient or the strength reserve coefficient of the jointed rock slope are acquired. The method has the advantages that the concept is clear and the computational accuracy is high, and the method can be applicable to bearing capacity analysis of translational or rotational failure of the jointed rock slope.

The invention relates to an intelligent cutter of an integrated small three-way cutting force measurement system, belonging to the fields of ultraprecise cutting machining and cutting force measurement and real-time monitoring. The intelligent cutter can realize the real-time sensing measurement of small three-way cutting force in the ultraprecise machining process. The intelligent cutter mainly comprises a cutter bar, a cutting blade, a cutting force measurement system, a sealing cover and a signal interface end, wherein the upper surface of the cutting blade coincides with the central surface of the main body of the cutter bar; the cutter tip is positioned in the center of the main body of the cutter bar; the front end of the main body of the cutter bar is provided with a sensing measurement section; the small three-way cutting force measurement system is fixedly connected in a force measurement cavity of the sensing measurement section; the signal interface end is arranged at the back end of the cutter bar and is used for realizing signal output; and in the cutting machining process, a sensing unit senses the strain and displacement generated under the effect of the three-way cutting force to acquire a corresponding signal, and the small three-way cutting force is accurately computed through calibration and decoupling. The invention is used for related scientific researches in the field of ultraprecise machining and real-time monitoring and self-adaptive machining in the cutting process.

The invention relates to the field of traditional Chinese medicine information search and discloses a traditional Chinese medicine data mining method based on an LDA (Latent Dirichlet Allocation) topic model. The method comprises the following specific steps: 1) determining two groups of priors, namely prescription-topic and topic-medicament, in the LDA model, and conducting priori assumptions to the two groups of priors by an AS (Asymmetry Symmetry) method, wherein the prescription-topic and the topic-medicament are determined respectively by Alpha and Beta; 2) determining the number of topics in the LDA model; 3) solving the LDA model by a Gibbs sampling method; 4) generating a semantic RDF (Resource Description Framework) document of the LDA model, mapping the result of the LDA model to a tetrad, and expressing the result with the semantic RDF document; 5) associating medicaments with prescriptions to build a prescription-topic-medicament with visual structure network G. The method has the advantages of being suitable for handling and mining a great quantity of traditional Chinese medicine prescriptions and capable of obtaining visual structure models.

Systems and methods which implement surrogate (e.g., approximation) models to systematically reduce the parameter space in an optimization problem are shown. In certain embodiments, rigorous (e.g., higher fidelity) models are implemented with respect to the reduced parameter space provided by use of surrogate models to efficiently and more rapidly arrive at an optimized solution. Accordingly, certain embodiments build surrogate models of an actual simulation, and systematically reduce the number of design parameters used in the actual simulation to solve optimization problems using the actual simulation. A multi-stage method that facilitates optimization of decisions related to development planning and reservoir management may be provided. Iterative processing may be implemented with respect to a multi-stage optimization method. There may be uncertainty in various parameters, such as in reservoir parameters, which is taken into account according to certain embodiments.

The invention discloses a reverse design method for an impeller of a centrifugal pump, which comprises the following steps: according to a given impeller axial plane, a blade in a three-dimensional space can be actually expressed as X=X(z(u, v), r(u, v), theta(u, v)), the (z(u, v), r(u, v)) has been determined when a streamline of the impeller axial plane is given, and the space modeling of the blade can be determined by determining the theta(u, v) on the impeller axial plane. The reverse design method is characterized in that the reverse design method transforms a geometric design problem of the blade of the centrifugal pump into a boundary value problem of a partial differential equation to solve under the condition of the given impeller axial plane of the centrifugal pump. The reverse design method overcomes a lot of disadvantages such as the definition and modification of geometrical shape of the blade in the prior design method, can realize the parametric design of the blade, overcome the defects existing when a fussy two-dimensional form drawing is used for showing three-dimensional twisted blades in the prior method, can closely combine the hydraulic design of hydraulic machinery, three-dimensional solid modeling and the CFD analysis of flow field, and realize the quick and accurate solving of the reverse problem of the blade.

The invention discloses a method for setting stop stations of an urban bus line, relating to the technical field of urban bus programming. The method comprises the following steps of: establishing a multi-target programming model through the functional relation between the setting of the bus stop stations as well as an averaged passenger bus travel time, an averaged bus running time and a unit-length bus service cover area; and solving by adopting a correctional vector estimating genetic algorithm to obtain an optimum bus stop station setting scheme. The method in the invention fully takes the influence of the setting of the bus stop stations on passengers, bus operations and urban bas systems into account and ensures that the cover area of the bus service is as large as possible under the condition of ensuring that the passenger bus travel time and the bus running time are as short as possible. Compared with the prior art, the method greatly improves the setting reasonableness and accuracy of the bus stop stations and has the important significance on the urban bus programming.