3174 results about "Simulation software" patented technology

One embodiment of the present invention provides a system for determining whether software is likely to exhibit malicious behavior by analyzing patterns of system calls made during emulation of the software. The system operates by emulating the software within an insulated environment in a computer system so that the computer system is insulated from malicious actions of the software. During the emulation process, the system records a pattern of system calls directed to an operating system of the computer system. The system compares the pattern of system calls against a database containing suspect patterns of system calls. Based upon this comparison, the system determines whether the software is likely to exhibit malicious behavior. In one embodiment of the present invention, if the software is determined to be likely to exhibit malicious behavior, the system reports this fact to a user of the computer system. In one embodiment of the present invention, the process of comparing the pattern of system calls is performed on-the-fly as the emulation generates system calls.

Developing decision-making skills of a user through practice in a simulated environment comprises defining a simulated situation to be influenced by the user including a set of objects that are represented by an attribute-characteristic representation, presenting information concerning a current state of the simulation, obtaining decisions from the user that at least partially determine object designs to be evaluated, evaluating an object design using a value function having multiple optima, updating the simulation with the results from the evaluation, and permitting continued practice by selectively repeating several of these steps. A system executes simulation software that simulates such a situation on a processor, and includes evaluation software for selecting and evaluating design objects by applying a value function having multiple optima. At least one terminal and communication links are provided for information transfer and implementation of the simulated situation. Diagnosis of the user's cognitive approach is also disclosed.

A method and system for simulating the execution of a software program on a simulated hardware system. An instrumented software program is divided into program segments delineated by tags and is then analyzed for data describing the program segments. The data is tabulated and indexed in a function data table according to the program segments. Hardware parameters that at least define a portion of the simulated hardware system are tabulated in a hardware configuration file. The software program is executed on a host system, and when a tag is executed, data indexed in the function data table under the program segment corresponding to the executed tag and hardware parameters tabulated in the hardware configuration file are used to calculate an estimated execution time for the program segment corresponding to the executed tag. The estimated execution time for the program segment is added to a running total for the overall execution time of the software program. The system includes a memory for storing software parameters describing program segments of the software program, and for storing hardware parameters that at least partially define the simulated hardware system. The system further includes a processor for calculating an estimated execution time for the software program using the software and hardware parameters.

Selectively emulating sequential consistency in software improves efficiency in a multiprocessing computing environment. A writing CPU uses a high priority inter-processor interrupt to force each CPU in the system to execute a memory barrier. This step invalidates old data in the system. Each CPU that has executed a memory barrier instruction registers completion and sends an indicator to a memory location to indicate completion of the memory barrier instruction. Prior to updating the data, the writing CPU must check the register to ensure completion of the memory barrier execution by each CPU. The register may be in the form of an array, a bitmask, or a combining tree, or a comparable structure. This step ensures that all invalidates are removed from the system and that deadlock between two competing CPUs is avoided. Following validation that each CPU has executed the memory barrier instruction, the writing CPU may update the pointer to the data structure.

A method for predicting localized damage and naturally occurring fractures in a subsurface region is provided. This invention uses a hybrid FEM-DEM (i.e. finite-discrete element) framework combined with a fracture risking analysis and fracture initiation and propagation criteria, to model the transition of rock from a state of continuum to discontinuum. The risking analysis combines results from other natural fracture prediction tools (e.g. displacement discontinuity method, restoration analyses, curvature analysis, analytical solutions, continuum analysis) to augment FEM-DEM solutions, such as by providing remote and local boundary conditions and identifying potential regions of anticipated damage and fracturing. Natural fractures and damage information is extracted from the modeling results and may be used directly for predictions or used as input into other fracture analysis tools or techniques. The FEM-DEM and risking techniques can be incorporated into a variety of numerical simulation software packages that use a finite-discrete method solver.

A computer simulation and virtual reality system simulates the use of a blasting nozzle to remove one or more coatings and / or rust from a virtual surface. The user operates an electronic controller in the form of a blasting nozzle that outputs a signal indicating whether the blasting nozzle controller is in an “on” position or in an “off” position. The system also has a motion tracking system that tracks the position and orientation of the blasting nozzle controller with respect to the virtual surface defined on the display screen. Simulation software in a computer generates virtual blast pattern data, and the removal of the virtual coating(s) and / or rust image from the virtual surface is displayed in real time on the display screen.

A virtual coatings application system has several features to enhance the realism of simulated spray painting. The system generally includes a display screen on which is defined a virtual surface (such as a truck door) that is intended to be virtually painted or coated by the user. Alternatively, the system includes a head-mounted display unit that displays a virtual spray painting environment in which the virtual surface is defined. The user operates an instrumented spray gun controller that outputs one or more signals representing data as to the status of the controls on the spray gun controller. The system also has a motion tracking system that tracks the position and orientation of the spray gun controller with respect to the virtual surface. Simulation software generates virtual spray pattern data in response to at least the data from the spray gun controller and the position and orientation data received from the tracking system. Virtual spray pattern images are displayed in real time on the virtual surface in accordance with the accumulation of virtual spray pattern data at each location on the virtual surface.

The invention provides an interactive scene simulation system realized by means of a computer and virtual simulation software, and simultaneously provides a scene virtual simulation method. The interactive scene simulation system established by the method can really, vividly, and accurately reflect characteristics, forms and layout of elements in an actual scene; meanwhile, by means of the interactive function, the interactive scene simulation system can replace an entity sand table to perform project demonstrating operation, overcomes the defects of complex manufacturing process, longer period, higher cost, difficult update and modification, larger occupied space, inconvenient carrying, easy damage in the carrying process and the like of the entity sand table, and also can combine database technology, geographical information technology and multi-media technology, provide multiple kinds of technical support, provide establishment and assistance of related information in the process of applying, managing, planning and deciding a corresponding building system for a user, promote application value, prolong the service life and greatly improve the value / cost ratio.

The invention provides a multi-scale multiphysics coupling simulation method of metal additive manufacturing. The method comprises the following steps: S1, establishing a metal additive manufacturing technology data model; S2, carrying out first-principles calculation by calculation software on a microscale through first principles to acquire micro physical properties of additive metal material; S3, establishing an NxNxN super-cell model of the additive metal material, and carrying out molecular dynamics simulation calculation through molecular dynamics simulation software; S4, studying plasma, which is generated in a melting process of metal powder heated by an electron beam or a laser, on a mesoscale; S5, utilizing a flow-heat-solid-magnet multiphysics coupling simulation platform for simulation calculation; and S6, establishing a technology parameter feedback control model for different types and distribution situations of defects, and optimizing metal additive manufacturing technology parameters. The method forms a macro-micro-integration metal additive manufacturing product quality prediction system by means of multi-scale multiphysics coupling simulation.

The invention discloses a satellite network simulation system and belongs to the technical field of satellite communication simulation. The system comprises a main control computer, a real-time satellite channel simulator and a plurality of service simulation node computers; the main control computer is provided with a satellite network simulation software system which can achieve establishment of a satellite network simulation scene, can select a routing algorithm, set link parameters and achieve the information management of the simulation satellite network, and is connected with the real-time satellite channel simulator by an RS232 bus; the service simulation node is provided with a service simulation software which achieves simulation of a transmission process of the satellite network service, and is connected with the real-time satellite channel simulator by an Ethernet port. The satellite network simulation system can truly and comprehensively simulate topological changes of the satellite network, channel characteristics of an inter-satellite link and a satellite-to-earth link, and the transmission process of the satellite network service under the laboratory condition.

An exemplary system includes a development subsystem configured to facilitate development of a software application and a simulation subsystem selectively and communicatively coupled to the development subsystem. The simulation subsystem is configured to emulate a plurality of processing device platforms, receive data representative of a selection of at least one of the plurality of processing device platforms, and simulate an execution of the software application by one or more processing devices associated with the at least one selected processing device platform.

This relates to allowing a computer system using a single pointing device to simulate multi-point gesture inputs. Simulating software can receive single pointing inputs (such as, for example, input from a mouse) and convert them to simulated multi-point gesture inputs such as finger pinches, reverse pinches, translations, rotation, and the like. The simulating software can also allow the user to use keyboard keys to give the user additional control when generating the multi-point gesture inputs.

The invention discloses a method for monitoring the structure health based on a distributed strain dynamic test; the invention adopts a distributed strain transducer to build a distributed sensing network and selects to arrange a reference transducer, carries out structure system simulation state analyzing to obtain a distributed strain simulation state vector DMSV, originally takes whether a target characteristic vector Alpha changes or not as a criterion to identify structural damage, obtains the effects of being capable of rapidly, accurately and effectively capturing the structural damage and locating, and simultaneously adopts the reasonable measures of real time image display and deleting redundant data on time, thereby having the advantages of small errors, high precision, simple process and intuitionistic monitoring; the method can eliminate the interference of noise and environment under the conditions of uncertain loading and an unknown mathematical model, carry out on-line structural damage detecting and diagnosing in real time and is suitable for long period monitoring of various engineering structures, especially for the civil structure.

A digital imaging system and method uses a two-stage sigma filter to de-screen color images. This filter does not assume any a priori knowledge about the screening process using to produce the halftone image. The two-stage sigma filter may therefore be used to convert color halftone images into continuous-tone images irrespective of the screening process used. The two-stage sigma filter may be constructed, or emulated in software, using an O (N) algorithm which performs smoothing and preserves edge information simultaneously in the Red / Green / Blue color space. This system and method outperforms conventional approaches which, for example, use a Gaussian blur, because it satisfies the dual criteria of completely eliminating halftone screens while preserving edge information. When combined with halftone segmentation techniques, a complete document processing algorithm for gray-scale and color documents is created.

The invention discloses an experiment testing method and device to test stressed state of product when falling on the ground. It has a clamping device to hang the object, and a piezoelectricity sensing platform is set under it. A CCD camera is set outside the platform. Impact accelerometer is set on the testing point of the testing object. Using a monitoring program to start clamping device to drop the object in free falling state, recording the process until the object knocking at the piezoelectricity sensing platform trigger circuit, starting CCD camera to capture the process, calculating falling angle, taking simulation test, and comparing simulation G value and accelerometer testing G value, the accurate testing value would be gained. It would effectively improve economic benefit.

Developing decision-making skills of a user through practice in a simulated environment comprises defining a simulated situation to be influenced by the user including a set of objects that are represented by an attribute-characteristic representation, presenting information concerning a current state of the simulation, obtaining decisions from the user that at least partially determine object designs to be evaluated, evaluating an object design using a value function having multiple optima, updating the simulation with the results from the evaluation, and permitting continued practice by selectively repeating several of these steps. A system executes simulation software that simulates such a situation on a processor, and includes evaluation software for selecting and evaluating design objects by applying a value function having multiple optima. At least one terminal and communication links are provided for information transfer and implementation of the simulated situation. Diagnosis of the user's cognitive approach is also disclosed.

The invention discloses a method for solving rigidity of a plate spring by using an automatic dynamic analysis of mechanical system (ADAMS). The method comprises the following steps of: step one, determining basic dimension parameters of the plate spring according to a design paper of the plate spring; step two, establishing a three-dimensional model by employing CATIA software to perform reasonable segmentation, and selecting necessary coordinate points; step three, establishing a Point hard-point, a Box block and a Beam beam in an ADAMS / View, putting forward an equivalent middle surface method in attribute setting of the Beam beam, and establishing contact force Contact; and step four, setting a simulation analysis environment of a stress-deformation curve of the plate spring, and employing a method for loading loads through contact of a flat plate and a spheroid to obtain a simulation curve. The method solves the problems in establishing a plate spring flexible body model through the ADAMS software, and the problems in performing simulation setting on the stress-deformation curve of the plate spring flexible body model, and has important meanings for improving the modeling, analyzing and solving accuracies and the calculation speed of mechanical simulation software.

The invention discloses a low-pressure core assembly casting technique for V6 aluminum cylinder-block of engines, which is used for casting V6 aluminum cylinder-block of automobile engines. The casting technique adopted combines a low-pressure casting method and a core assembly method; the three-dimensional modeling of products is firstly carried out; according to the shape of the cast product, a crankcase is determined to be downwards and the aluminum liquid is let in from the baffle of the crankcase during casting course; the position of the sprue is selected and the size of the sprue is determined; a casting simulation software is adopted to carry out a simulation casting, the defects that are possible to occur are analyzed and a technical design scheme is made according to the analytic result, which essentially comprises the steps of : 1) making cores; 2) combining sand cores into a sand core group (6); 3) casting under low pressure. The casting technique of the invention can adopt flexible core assembly modes according to different shapes of engine blocks to produce aluminum cylinder-block cast products which are complex and of fine quality and has thin wall, meanwhile, the casting technique is applicable to the mass production with automatic production lines, thus having the advantages of low cost, high efficiency and high qualification rate.

The invention discloses a cable fault positioning simulation method using time domain reflectometry. The method includes the following steps that S100, a cable distributed parameter circuit model is established through Pspice simulation software according to the operating parameter of a cable to be detected; S200, an equivalent circuit model of a pulse generator and an equivalent circuit model of an oscilloscope are established through the Pspice simulation software, wherein different pulse widths can be set in the pulse generator; S300, the model of coaxial cable transmission lines connected among the cable to be detected, the pulse generator and the oscilloscope and the model of coaxial cable transmission line connecting points are established; S400, the simulation system is made to operate according to an established artificial circuit model, the traveling wave propagation process of any node is tested, and meanwhile the actual reflected impulse waveform of the cable to be detected can be tested. By the adoption of the cable fault positioning simulation method, the operation accuracy of simulation experiments is improved, and extremely high application value is achieved to application and study of a time domain pulse method.

The invention discloses a deep learning intelligent constellation diagram analysis method based on a convolutional neural network, and relates to the technical field of optical communication. According to the method, the performance analysis on a constellation diagram is performed by building and training a convolutional neural network module. The method comprises the following steps of acquiring a training data set of a constellation diagram; preprocessing the constellation diagram; training a CNN module for feature extraction; inputting the to-be-analyzed and preprocessed constellation diagram into the well trained CNN module for pattern recognition and performance analysis; and outputting an analysis result. According to the invention, the depth learning technology based on the convolutional neural network is applied to the constellation diagram analysis. In this way, the problem in the prior art that, the problem that original data cannot be directly processed and needs to be manually intervened during the traditional constellation diagram performance analysis can be solved. By using the CNN module, the intelligence and the automation of analysis of the original image information of the constellation diagram are achieved. As a result, the module can be used as a constellation diagram software processing and analyzing module of an oscilloscope and a constellation diagram analyzing module of the simulation software to be further embedded into a test instrument for intelligent signal analysis and performance monitoring.

Systems and methods of using hardware to simulate software, specifically the semantic operations defined in HDL simulation languages. Traditional software HDL simulation kernel operations of advancing time, activating threads in response to notified events, and scheduling those threads of execution are handled via a simulation controller. The simulation controller is comprised of a timing wheel, an event-processor, a thread / process dispatch engine, a token processor, and a resource-allocator. These components work together with a control logic component to perform the semantic operations of an HDL software kernel.

The invention relates to a single image defogging algorithm based on deep learning, comprising the following steps: a large number of bright and fogless images are obtained as a fogless image set in a training sample, and fog interference of different concentration is applied to the fogless image set through simulation software to generate a foggy image set; the fogless image set and the foggy image set are converted to an HDF5 format to get a training sample and a test sample; the training sample and the test sample are input to a deep convolution network of which the parameters are set, the deep convolution network is trained until the cost loss reaches a certain extent and the number of iterations reaches a maximum, and a trained model is obtained; and finally, foggy images are input to the trained model, and fogless images are restored directly. The invention provides an end-to-end convolution neural network which can restore fogless images directly from foggy images, and estimation of the intermediate parameters is omitted. Moreover, color distortion of the flat area in a foggy image is avoided, natural and synthetic foggy images can be processed effectively, and a better effect can be achieved.

The invention models software as a physical device with causality. It develops interaction between software and user in a software dynamic system that connects software or modeled software with a software controller. The software is modeled with its input / output behavior on a discrete sampling domain and is controlled by the controller in a modeling software dynamic system while its behavior is observed real-time to identify its model. The modeled software is controlled by the same controller in a simulation software dynamic system, which can be augmented programmatically. Augmentations integrated with the controller construct a software amplifier coupling the modeled software and user interactively and automatically. The modeled software represents domain knowledge simulated in the augmented system as software intelligence. A software-2 including the modeled software, the software controller, and augmentations is created. Software-2 integrated with real-time communication distributes over Internet with a Master-Machine-Learner loop as a new interactive media.

The invention discloses a testing device of a nuclear power station digitized instrument and control system. The testing device relates to the field of automation control and comprises a control device and a signal processing device, wherein the control device comprises an industrial control computer, a collection card installed in the industrial control computer and a control software controlling the testing process; the signal processing device comprises a layplate and a conditioning card; two ends of the layplate are connected with the collection card and the conditioning card through signal wires respectively; and the other end of the conditioning card is connected with a DCS (data communication system) control cabinet to be tested through a signal wire. The testing device adopts the DCS control cabinet or process system as a unit for testing, and can enable all the signals to be simultaneously connected into the testing device for finishing all the test items of the DCS control cabinet or the process system by one time, thus improving testing efficiency and saving human resource. The control method shows the testing state and expected result in real time, the simulation software can simulate the control loop of the process system, and the control accuracy and control effect of the process system state testing can be set according to the needs.

The invention relates to a power distribution network fault classification method based on the adaptive neuro-fuzzy inference system. The method is an improved method based on the adaptive neuro-fuzzy inference system. According to several frequently-occurring short circuit fault types of the power distribution network, a hierarchical based adaptive neuro-fuzzy inference system is constructed in the method, various short circuit faults are simulated based on a simulation software and the fault phase current is collected as the training sample data, and the blended learning algorithm is used for training the constructed hierarchical adaptive neuro-fuzzy inference system to determine the parameter in the system; the hierarchical adaptive neuro-fuzzy inference system with the determined parameter can be used for discriminating the fault types of the power distribution network. A lot of simulation data validations indicate that the classification method provided by the invention has a higher classification and identification accuracy, and has a better robustness on the variation of the fault points and a strong adaptability on the variation of the network topology.

The invention discloses a high dynamic satellite channel simulator, belonging to the field of satellite communications. The satellite channel simulator comprises a channel parameter generation unit, a channel simulation unit and a radio frequency unit. The whole system has the following working principle: a computer operates satellite channel simulation software, a satellite channel model, a communication frequency point, orbit parameters, terminal parameters and environmental parameters are configured, and a simulation program is started after configuration is completed. In the operating process of the simulation program, generated channel parameters are transmitted to the satellite channel simulation unit via the Ethernet network, the simulation unit loads the satellite channel parameters to a signal sent by a satellite communication device, the realization of channel simulation is completed, and finally, the radio frequency unit modulates the signal to radio frequency. The invention has the main goal of accurately and timely simulating a satellite channel under laboratory conditions, and a channel simulator with controlled cost and strong operability is provided for the development of the satellite communication device.

Variable accuracy simulation software for modeling an existing or planned wireless network includes a modeling framework containing a of predetermined software objects configured to model a network elements of the existing or planned wireless network. The simulation software enables the generation of at least one process related to at least one of the software objects, wherein the at least one virtual process corresponds to a physical process related to the existing or planned wireless communications network. The simulation software also includes accuracy adjusting means for selectively adjusting the accuracy and execution speed of an output generated upon the interaction of the at least one software object and the at least one virtual process. The simulation software also enables modeling network user behavior and cost-based analysis of the wireless network.

A monitoring of catalytic cracking processing is provided which uses near infrared (NIR) analysis to characterize cracking feeds, intermediates and products for chemical and physical properties such as saturates, monoaromatics, diaromatics, triaromatics, tetraaromatics, polar aromatics, total aromatics, thiophenes, distillation points, basic nitrogen, total nitrogen, API gravity, total sulfur, MCRT and % coker gasoil and the resulting characterization thereof. The NIR results can be used in FCC simulation software to predict unit yields and qualities.

The invention relates to a network communication technology, in particular to a virtual-reality-based network conference method. The method is characterized in that: the method is implemented by a network database, a master virtual venue terminal, conference participant terminals and controls, wherein the master virtual venue terminal and the conference participant terminals form a venue model with the network database, and are connected with the network database; the controls are installed at the master virtual venue terminal and the conference participant terminals; and the method comprises the conference initiation of the controls installed at the master virtual venue terminal and the conference participant terminals, the enrolling of conference participants and the conferencing. In the virtual-reality-based network conference method provided by the invention, virtual reality simulation software Vega is integrated with virtual human simulation software DI-GuyScenario to construct a virtual venue environment, a virtual human agent with sense of reality is established by three-dimensional modeling software, and the synthesis of the distributed venue and the consistency of behaviors of each conference participant terminal virtual agent are realized by the database and Winsock network communication.