142 results about "Modelica" patented technology

The invention relates to a method for predicting the performance of large-scale hydrocarbon-bearing reservoir floods. One embodiment of the invention includes a method for predicting performance of a patterned flooding process in a subterranean hydrocarbon-bearing formation, said formation being penetrated by a plurality of injector wells and producer wells, comprising the steps of: determining flow-based pairs of injector to producer wells [FIG. 4, item 78a] (first well pairs) using a geological model [item 76]; developing a connective pore volume distribution curve for each first well pair item [78b]; selecting at least two first well pairs (selected well pairs) that reflect narrow and wide connective pore volume distributions that correspond to high and lower oil recovery levels; developing a 3-D simulation model for each selected well pair, performing a reservoir simulation for each selected well pair for the corresponding flooding process; and generating prototype performance curves for each selected well pair. An alternate embodiment of the invention includes a method for predicting the performance of large-scale hydrocarbon-bearing reservoir floods where injection well location, production well location, a process parameter, or a well processing rate is modified.

The present invention teaches that cognitive skills may be trained by methods of increasing loading, distraction and pace while a trainee is carrying out a cognitive skill related repetitive mental task. Loading may comprise addition of a second repetitive mental task, distraction may be visual, auditory, kinesthetic and may increase in the power of the distraction, and pace may be increased until a maximum pace is achieved. Patterned, continuous, intermittent, and combined loading, distraction and pace changes may be used, as well as patterned feedback. The result is that the student learns to process the stimuli—using the cognitive skills—at increased levels of efficiency and speed.

A system, apparatus, and method are disclosed for predicting accesses to memory. In one embodiment, an exemplary apparatus comprises a processor configured to execute program instructions and process program data, a memory including the program instructions and the program data, and a memory processor. The memory processor can include a speculator configured to receive an address containing the program instructions or the program data. Such a speculator can comprise a sequential predictor for generating a configurable number of sequential addresses. The speculator can also include a nonsequential predictor configured to associate a subset of addresses to the address and to predict a group of addresses based on at least one address of the subset, wherein at least one address of the subset is unpatternable to the address.

The invented software system and method is an easy-to-use, browser-based solution, providing casual business computer users the ability to create, modify, and monitor business processes, much like spreadsheet software allows users to quickly complete complex math calculations. It is built on a “fill in the table” interface so any user can create a customized process within minutes, without having to understand how to flow chart or program a computer. Automatic alerts regarding work to be done, sent through a normal email client, are included as part of the product's feature set as well as a chronological history and a variety of default reports. Processes are easy to set up, deploy, and control, and participation in those processes is simple and fast. Any process can be immediately launched and is saved as a template for later use or modification. Templates can be shared or sold to other users, as well. Briefly, the invented system and method includes software running on a server accessible via a network, e.g. a local area network (LAN) or wide area network (WAN) such as the world-wide web by subscribing and logged on one or more proximate (centralized) or remote (distributed) users with laptops, desktops or workstations. The software features a friendly user interface with toolboxes, menus and buttons for patterned templating of processes and tasks and for management and oversight of the same. Process authors can construct templated processes in a table-drive manner that is parse-able by a process compiler and executable by a process engine. Process users can create task assignees chosen at will or from their own address books. Task assignees can use the software to follow optionally check-listed task steps and start/stop dates and times can be monitored and logged. Finally, reports can be generated. E-mail is the preferred conveyance of task-notification messages among various users of the invented software.

The present invention provides a novel file management approach. The systems and methods comprise a schema-based file management technique that can be integrated within an operating system to provide application developers an efficient and powerful develop utility to build applications. In addition, the system and methods provide for applications that can be employed uniformly across disparate data (e.g., audio and video data) within the operating environment. The schema can include a base schema that is related to known types of data and derived schema that extend the base schema with respect to one or more characteristics of the data. The schema can be employed to generate APIs that can be employed by users and/or applications to exchange information with a file system. In addition, the systems and methods can include configurable intelligence that can be utilized perform actions and/or make decisions, which can automate processes and/or facilitate data storage and/or management.

The invention discloses a file serialization method of a model library of physical modeling language Modelica. The method is characterized by comprising the following steps: while loading the model library for the first time, lexical/syntactic analysis is carried out on source files of the Modelica model library; a document object model (DOM) abstract syntax tree is established; and the data of the DOM abstract syntax tree is saved in serialization destination files by a serialization technology. Meanwhile the invention further discloses a corresponding deserialization method. The method disclosed by the invention has the advantages that by means of the preprocessing course, while loading the model library for the first time, the serialization destination files are generated so as to facilitate loading the model library next time only by directly reading the destination files, thus avoiding lexical/syntactic analysis of the model library every time and greatly accelerating the loading speed of the model library. A Modelica2.1 standard library is taken as an example: while not using the method, the loading time is 300 seconds; and while using the method, the loading time is only 600 milliseconds.

A patterned response system and method provide for automatically, e.g., programmatically, generating learning items that are useable in conjunction with an assessment. In one embodiment, the learning items may be generated as an aggregation of patterns corresponding to a targeted skill and related skills. The relatedness of skills may, for example, be determined according to a precursor/postcursor based learning relationship that may be represented by a learning map.

A new and/or improved method, apparatus and/or system is disclosed which aids in extending correct behavioral models to include fault modes and in fault mode analysis of components and/or systems in simulated model environments, including, e.g., FMEA and FMECA and diagnostic fault tree generation.

The invention relates to a method for simulating a mechanism motion virtual experiment based on mechanical principles of members. The method comprises the following steps of: 1) establishing the logic models of basic members in a uniform modeling language mode, namely Modelica, establishing the three-dimensional geometric models of the members by using three-dimensional modeling software, and integrating the three-dimensional geometric models of the members with the logic models of the members to establish a complete experimental member model which is described in extensible makeup language (XML); 2) constructing the experiment scene Modelica model of the virtual experiment, reading corresponding member files according to the members which are required by the experiment, selecting the three-dimensional models of the members, and assembling interfaces which are required to be connected among the members; 3) after the assembly is finished, setting simulation parameters, and starting the compilation solving simulation of the scene model; and 4) processing the data of a solving result file, and driving the visualization of a mechanism three-dimensional model in the assembly simulation environment of the virtual experiment. Compared with the prior art, the method for simulating the mechanism motion virtual experiment based on the mechanical principles of the members has the advantages that: boring theoretical knowledge becomes vivid and easy to grasp and has high universality, and the like.

The invention discloses a parameter optimization method of Modelica model based on surrogate model, which comprises the following steps: 1, compiling Modelica model and obtaining model parameter and variable information; 2, optimizing modeling; 3, generating sampling point; 4, carry out simulation calculation on that parameter combination; 5, analyzing that simulation calculation result; 6, constructing a proxy model; 7, using that surrogate model to replace the Modelica model to carry on the optimization iteration and find the optimal parameter; 8, carrying out simulation calculation on thatoptimal parameters, and if the error between the simulation calculation result and the output result of the proxy model is small than a set value, executing the step 10, otherwise executing the step 9; 9, dynamically updating the agent model according to the simulation calculation result of the step 8, and then executing the step 7; 10, the optimal parameter calculated in the step 7 is the final optimization result, and the parameter optimization is finished; Through the above steps, the invention achieves the purpose of improving the parameter optimization efficiency of the Modelica model, and solves the practical problem that the calculation amount in the parameter optimization process of the Modelica model is huge and it is difficult to optimize the parameters of the large-scale model.

The invention relates to the technical field of simulated modeling of a rotor dynamics system and in particular to an object-oriented nonlinear and non-causal modeling and simulation method for the rotor dynamics system. The modeling and simulation method is based on an object-oriented non-causal multi-field modeling language Modelica; the modeling language Modelica is used for writing the simulated modeling program of the rotor dynamics system; the simulated modeling of the rotor dynamics system is formed by components and faults; the components comprises a turntable component, shaft section components and a bearing component; the turntable component, the shaft section components and the bearing component comprise two connector elements respectively; the faults comprise crack fault, rubbing fault and foundation loosening fault; and by the modeling and simulation method, the rotor dynamics systems with various structures can be modeled, system characteristics and working condition of the rotor dynamics systems can be truly reflected, the faults such as crack, rubbing and foundation loosening can be introduced to perform system analysis, and a convenient analysis measure is provided for engineering technical persons and scientific researchers.

The invention discloses a Modelica language based design method of a system for stimulating a cantilever crane of a concrete pump truck. The method comprises the following steps of: detaching a real physical model according to a sequence of a cantilever crane main body, functional subsystems of the cantilever crane, and components of the cantilever crane; establishing each model library according to a sequence of a component module library, a subsystem module library and a system module library, establishing a parameterized interface of each module based on parameterized modeling, and transferring physical and mathematical equations through parameters between the interfaces; encapsulating a model and providing a user parameter setting window, wherein the same model library has a common interface and different model libraries are connected by an element comprising the common interface shared by the different model libraries, so that parameter transfer between models in different fields is ensured and a complicated pump truck cantilever crane model cam be built. The Modelica language based design method of the system for stimulating the cantilever crane of the concrete pump truck has the characteristics of modularization, layering, standardization and parameterization; stimulating modules are interoperable and can be reused; and through an open modeling concept, different components can be added in the using process.

The invention discloses a distributed real-time interactive simulation system based on modelica modeling language, which combines with the advantage of the modelica modeling language which supports multi-field simulation modeling and existing HLA (high level architecture) simulation system structure according to weak link of the modelica modeling language on the aspect of interactive simulation. Multiple isomeric computers are connected with each other by a center server through the high-speed network provided with unified communication standards, principles and protocols, and the distributed real-time interactive simulation system is realized by client sides, the center server, sub computing servers, simulator dispatch interfaces and simulators, and the client sides and the center server are communicated through the TCP (transmission control protocol). By the aid of the distributed real-time interactive simulation system which is characterized by providing unified simulator dispatch interfaces, developing new simulation tests is easier, developing difficulty is reduced and extendibility of the system is improved.

The invention relates to the technical field of simulation systems of amplitude-changing mechanisms of automobile cranes, particularly to a Modelica language-based simulation modeling method of the amplitude-changing mechanism of the automobile crane. The Modelica language-based simulation modeling method comprises the following steps: 1) dismantling the system; 2) performing component-level modeling; 3) performing sub-system-level modeling; 4) performing system-level modeling; 5) performing simulation control; and 6) finally demonstrating a simulation result. The Modelica language-based simulation modeling method disclosed by the invention adopts a modeling language Modelica of a multi-domain uniform object-oriented physical system for performing mechanical, hydraulic, control and other multi-domain coupled modeling and simulation on the amplitude-changing mechanism of the automobile crane, and various performance curves in two models, namely control and non-control, are analyzed and compared, so that the model adopting the method is proved to be capable of greatly improving the stability of the whole machine in comparison with mechanical and hydraulic models, and avoiding great hydraulic shock and vibration.

The invention provides a Modelica language-based engine cooling system simulation modeling method. The method comprises a step of system decomposition in which the engine cooling system is decomposed into a part model library, wherein the part model library comprises an engine model, a cooler model, a thermostat model and a water pump model, and the thermostat model has delay and hysteresis features, a step of system modeling in which a mechanical system rotation interface model, a cooling liquid loop system interface model and an air end interface model are adopted to connect the engine model, the cooler model, the thermostat model and the water pump model to form a mechanical system, a cooling liquid loop system and an air end system, and a step of simulation control. Simulation of the engine cooling system model is well consistent with the actual engine cooling system.

The invention discloses a spacecraft information system modeling simulation method based on a Modelica language. According to the method, an information system modeling simulation theory and a Modelica technological system are combined to form an object-oriented statement-type modeling method used for constructing a non-causality information system model base; and meanwhile a modeling simulation system is developed and used for realizing construction, management and simulation analysis of a component model and an information system model. Through the method, it is not needed to decouple an information system or stipulate a component input and output order and an equation solving order, the simulation system can determine the equation solving order according to an equation system data stream environment only in the solving process, therefore, the difficulty and complexity of information system modeling are greatly lowered, modeling workload is lowered, errors brought by manually designating the solving order are avoided, the reusability, expandability, flexibility and knowledge accumulation capability of the models are remarkably improved, and modularization, parameterization and visualization are realized under the support of the modeling simulation system.

In order to investigate the behaviour of a data storage system, the time differences between commands from an analysis device and the completion of the operations defined by those commands are analyzed. The method may use a factorial parameter table definition representing common threads of I/O events in a patterned, cyclic nature, using a host computer as the host application emulator and data logger. The workload definition is provided either from hypothetical proposed thread parameters, or by statistical and common factorial analysis of real application I/O traffic analysis, or a combination of both. The generated workloads can be run while measuring the I/O event completion timings and event queuing characteristics, facilitating engineering interpretation of results for the purpose of analysing the effects of workload and system architectural design factors, and optimisation or evaluation of total system configurations.

The invention discloses an IDS based automatic generation method for a spacecraft electric simulation model. The method comprises the following steps: based on an established power supply and distribution professional model library, extracting device connection relationships from an IDS set to generate a system model framework, and traversing devices in the model library according to IDS device information and corresponding device connection relationships of models in the power supply and distribution professional model library; judging whether homonymic models exist or not in the model library; and connecting generated model instances to model interfaces and layering the models to finish the automatic generation of the electric simulation model. According to the method, the conversion from IDS to a Modelica simulation model is realized, a power supply and distribution system simulation model framework can be automatically generated, and the power supply and distribution system framework design is evaluated in combination with the model library; and quick simulation verification of a design result is supported to achieve the purposes of verifying and optimizing a power supply and distribution system design scheme and improving the power supply and distribution system performance.

The invention relates to the technical field of electro-hydraulic servo valve simulation systems, in particular to a simulation modeling method of electro-hydraulic servo valve based on a Modelica language, which includes the following steps: 1, system disassembly; 2, component level modeling; 3, subsystem level modeling; 4, system level modeling; 5, simulation control; and 6, simulation result demonstration. The simulation modeling method of the electro-hydraulic servo valve based on the Modelica language utilizes multi-territoriality, non-causality and object orientation of the Modelica language to perform secondary development, an obtained electro-hydraulic servo valve simulation model can faithfully reflect operating conditions and characteristics of the electro-hydraulic servo valve and substitute a electro-hydraulic servo system to conduct further system analysis and design, and the simulation modeling method can provide excellent analysis tools and analysis approaches for servo researching and working personnel.

The invention provides a fault management method based on a Modelica model. The method comprises the following specific steps of (1) fault analysis; (2) fault classification; (3) fault modelling; (4) fault extraction; and (5) fault injection for realizing modification of parameters of a fault component in the Modelica model, wherein the fault injection includes parameter type fault injection and variable type fault injection. Through the steps, the fault management based on the Modelica model is realized, the flexible modelling of the fault component and a unified fault management interface are provided, and a unified fault injection mode is adopted to be convenient for application of subsequent search methods related to fault management. The method has the characteristics of simple Modelica language modelling, visual display, strong applicability and the like, so that the method can well adapt to a complex system with the stronger electromechanical liquid coupling, the unified and reliable fault management method is provided, the construction period of subsequent fault diagnosis platforms is reduced, and the method has popularization and application value.

The invention discloses a joint simulation system based on Modelica and a construction method thereof. The method comprises the steps of: establishing a subsystem model in each modeling software; using various different modeling software and languages, for example, a C language model is established in Visual Studio, a Simulink model is established in Simulink, an AMESim model is established in AMESim, a Fortran language model is established in Visual Studio, and the like; compiling each subsystem model to generate a dynamic link library, wherein the dynamic link library comprises a model simulation interface and a model solver; packaging each sub-calculation model into a subsystem Modelica model by utilizing an external function mechanism of Modelica; and finally, writing a master controlmodel by using a Modelica language, defining a sampling step length of each subsystem module, and scheduling each subsystem by using a solver of a master control end to realize data synchronization ofthe system. According to the technology, multi-modeling software and multi-language modeling can be supported, system simulation is divided into system scheduling and subsystem calculation, all subsystems are placed in independent processes to be solved, and the solving speed of the system is increased.

The invention discloses a method for converting a Python model to a Modelica model. A user only needs to sort out the Python model and fills in an xml file according to an xml data format, and a C language function model and a Modelica language model can be generated by automatic encapsulation through the support of a C language generation module and a Modelica language generation module. The method not only can greatly shorten coding time and testing time in the model encapsulation and improve the model encapsulation efficiency, but also completely meet the requirement for the successful encapsulation of different Python models. The method solves the integration problem of the Python model and the Modelica language, fills the market blank that the current market lacks tools which meet the requirement, helps the two languages complement with each other, and assists engineers in performing more effective simulation tests; at the same time, the engineering system modeling efficiency is improved, and the modeling mode is expanded.

The invention discloses a model-based dynamic analysis method for an extruded two-component liquid power system. An object-oriented declarative liquid power system modeling method is formed by combining a liquid power system modeling simulation theory with a Modelica technical system and used for guiding a modeling process of a non-causal model library of the liquid power system. For a complex system such as the liquid power system, the system does not need to be decoupled, and component input/output and equation solving sequences do not need to be defined, so that the difficulty and complexity of system modeling are greatly lowered, the workload is reduced, an error caused by manually specifying the solving sequence is avoided, and the reusability, expandability, flexibility and knowledge accumulation capability of models are remarkably improved.