Abstract: Formal verification of models using concurrent model-reduction and model-checking. For example, a system for formal verification of models includes: one or more model reducers to reduce a model; one or more model checkers to check the model, wherein at least one of the model reducers is to run concurrently with at least one of the model checkers; and a model synchronizer to synchronize information between at least one of the model reducers and at least one of the model checkers.

Abstract: Embodiments of the present invention provide a method, system and computer program product for duration estimation of simulating a process model embodied in a directed graph. In an embodiment of the invention, a method for estimating a duration of simulation for a process model embodied in a directed graph can include loading a directed graph for traversal in a simulation engine, identifying nodes in the directed graph, estimating a duration of simulation by the simulation engine for individual ones of the nodes, summing a duration of simulation for the individual ones of the nodes to produce an estimate of a duration of traversal of the directed graph, and presenting the estimate in association with the traversal of the directed graph by the simulation engine.

Abstract: A method for determining a time course of an accident which occurs inside an installation in which takes place at least one risk-prone process, characterized in that it comprises: (a) a step (MS) for determining a source term (S(t)) which identifies a source at the origin of the accident and which comprises rate data of a harmful substance emitted by the identified source, (b) a step (Mcd) for calculating in real time, amounts of the harmful substance present in different points of the installation, from said rate and from geometrical data (GI1) of the installation, and (c) a diagnostic step (MD) at the end of which a datum (dInt) of feasibility or non-feasibility of intervention in the installation is delivered, after analysis of the time-dependent variations of the amounts calculated in the calculation step.

Abstract: A method and a device are provided for performing channel simulation. The device includes a radio channel simulation block and a memory and it is configured to simulate a radio connection between a transmitter and a receiver in real time. The device is further configured to simulate a radio connection between at least one interfering signal source and the receiver in real time, and to store the simulation result in the memory, and to read the stored simulation results in real time from the memory and add the results read to the simulation during simulation of the radio connection between the transmitter and the receiver.

Abstract: The object of the instant invention is a method for simulating the haptics of an interaction of an object guided by a user, hereinafter referred to as tool, with a virtual three-dimensional object, in particular the scanning of the surface of the simulated object and/or the penetration of the guided object into the simulated object, under material removal, if applicable.

Abstract: Methods and systems for register mapping in emulation of a target system on a host system are disclosed. Statistics for use of a set of registers of a target system processor are determined. Based on the statistics a first subset of the target system registers, including one or more most commonly used registers is determined. The registers in the first subset are directly mapped to a first group of registers of a host system processor. A second subset of the set of target system registers is dynamically mapped to a second group of registers of the host system processor.

Abstract: A method for optimizing the development of a fluid reservoir by accounting for a transient exchange term between porous blocks and fractures. The reservoir is discretized into a set of grid cells and an image representative of the fracture network delimiting porous blocks and fractures is associated with each cell. A transient exchange flow occurring between the porous blocks and the fractures is then determined at each cell by processing the image representative of the fracture network. Fluid flows in the reservoir are simulated by a flow simulator and an exchange flow and development of the reservoir is optimized by the simulation.

Abstract: A large-scale sound system or communication system is numerically and stably identified. When an input signal is represented by the M(?N)-th order AR model, high-speed H? filtering can be performed with a computational complex 3N+O(M). A processing section determines the initial state of a recursive equation (S201), sets CUk according to an input uk (S205), determines a variable recursively (S207), updates a matrix GkN, calculates an auxiliary gain matrix KUkN (S209), divides it (S211), calculates a variable DkM and a backward prediction error ?m, k (S213), calculate a gain matrix Kk (S215), and updates a filter equation of a high-speed H? filter (S217). To reduce the computational complexity, Kk(:, 1)/(1+&ggr;f?2 Hk Kk (:, 1)) is directly used as the filter gain Ks, k.

Abstract: A method of locating resources in a reservoir that includes at least one injection well and at least one production well includes mapping a modeled permeability characteristic of structures making up the reservoir, computing, based on the modeled permeability characteristic, an indicator of flow velocity for streamlines from each production well, computing, based on the modeled permeability characteristic, an indicator of flow velocity for streamlines from each injection well, and combining the indicators of flow velocity from each production and injection well to characterize a sweep efficiency of the reservoir system.

Abstract: A system and method for dynamically checking clearance within a geometric mesh model includes a user computer system having a remotely located computer system, and a data storage device. The method periodically updates a digital model of assembled component parts stored on the data storage device, interactively selects a predetermined clearance rule applicable to the digital model and interactively selects a predetermined clearance condition applicable to the selected clearance rule for the digital model that modifies the predetermined clearance rule. The method periodically calculates clearance within the assembled digital model using the selected clearance rule and the selected clearance condition and summarizing the clearance check. The clearance check summary identifies a clearance issue using a predetermined clearance checking criteria and submits the identified clearance issue to an issue manager software program for tracking clearance issues.

Abstract: A method and system for conciliating hydrocarbon reservoir model data. In one implementation, a set of local permeability values of a reservoir and an apparent permeability value of the reservoir are provided. A power value is numerically calculated from a mean power formula that relates the apparent permeability value of the reservoir to the local permeability values of the set via the power. The calculated power value is compared with a reference value. Depending on the outcome of the comparison, the set of local permeability values is modified.

Abstract: A system configured to model geometric architectures of flow events in geological reservoirs. In one embodiment, the system comprises a geological control input, a rules module, and a modeling module. The geological control input is configured to receive a set of environmental conditions that act as geological controls impacting a geometric architecture of a geological reservoir at a point in geologic time. The rules module is configured to apply a set of rules to the set of environmental conditions present at the point in geologic time to determine geometric flow parameters of the geometric architecture, wherein the set of rules comprise one or more empirical rules. The modeling module is configured to model the geometric architecture based on the geometric flow parameters determined for the flow event by the rules module.

Abstract: A method of modeling includes quantifying a co-operative strength value for a plurality of pairs of variables, and identifying a clique of at least three variables based on a graph of the co-operative strength values of a plurality of pairs of variables. The method also includes selecting a first pair of variables of the plurality of pairs of variables having a high co-operative strength value. A second clique may also be identified. A model of the first clique and a model of the second clique are made. The outputs of these models are combined to form a combined model which is used to make various decisions with respect to real time data.

Abstract: Disclosed are apparatus, methods and software that implement a partial element equivalent circuit (PEEC) method having global basis functions on cylindrical coordinates to determine wide-band resistance, inductance, capacitance, and conductance from a large number of three-dimensional interconnections in order to provide for the electrical design of system-in-package (SIP) modules, and the like. The apparatus, methods and software use a modal equivalent network from mixed potential integral equation with cylindrical conduction and accumulation mode basis functions, which reduces the matrix size for large three-dimensional interconnection problems. Combined with these modal basis functions, the mixed potential integral equations describe arbitrary skin and proximity effects, and allow determination of partial impedance and admittance values. Additional enhancement schemes further reduces the cost for computing the partial inductances.

Abstract: A system for determining the calibration factor uncertainty of a radiation sensor. A computing device accepts a mathematical model of the sensor, sample, and other items affecting the calibration factor, wherein each known mathematical model parameter is assigned its normal dimensions or values and each not-well-known parameter is assigned a variable with an upper and lower limit, and a shape parameter that describes the parameter may vary within or about the limits. Random values consistent with the upper and lower limits and shape parameters for each of the variable parameters in the model are then selected, to create a mathematical model of one possible variation of source-detector measurement configuration. The selection and calibration factor computation are then repeated a large number of times and statistical parameters describing the calibration factor and uncertainty are then computed. Another embodiment performs the steps at different energies for spectroscopic detectors.

Abstract: Methods, devices, and systems are disclosed for simulating a large, realistic computer network. Virtual actors statistically emulate the behaviors of humans using networked devices or responses and automatic functions of networked equipment, and their stochastic actions are queued in buffer pools by a behavioral engine. An abstract machine engine creates the minimal interfaces needed for each actor, and the interfaces then communicate persistently over a network with each other and real and virtual network resources to form realistic network traffic. The network can respond to outside stimuli, such as a network mapping application, by responding with false views of the network in order to spoof hackers, and the actors can respond by altering a software defined network upon which they operate.

Abstract: A CAD system, method, and computer readable medium. A method includes loading a CAD object including a plurality of faces, and identifying a plurality of candidate faces from the plurality of faces. The candidate faces can include candidate blends. The method includes combining multiple ones of the candidate faces into a candidate blend chain, including at least one candidate blend. The method includes replacing the candidate blends with accurate blends to produce a corrected blend chain, and storing the corrected blend chain with the accurate blends as part of the CAD object.

Abstract: According to a preferred embodiment, a method for identifying the analytical transitional cross-sections of a rigid transport element is disclosed. The method includes providing a 3D model of a rigid transport element, a list of total edges from the 3D model, a list of total faces from the 3D model, and a list of connecting edges from the 3D model, identifying all edges from said list of total edges which have connectivity with any edge in the list of connecting edges and are part of a cross-section, placing the identified edges into a list of cross-section edges, and identifying the analytical cross-section that lies on the plane defined by the edges in said list of cross-section edges.

Abstract: A method of determining a Negative Bias Temperature Instability (NBTI) effect that combines degradation and recovery for dynamic operation of an integrated circuit (IC) includes: specifying one or more parameters for a degradation model for the IC during a stressed portion of a voltage cycle; specifying one or more parameters for a recovery model for the IC during an unstressed portion of the voltage cycle; determining a degradation value for the voltage cycle from the degradation model; determining a recovery value for the voltage cycle from the recovery model; determining an NBTI value that combines the degradation value and the recovery value for the voltage cycle; and saving at least one value for the NBTI value.

Abstract: A method for predicting a residual online time of a peer in a peer-to-peer (P2P) network is provided. The method includes: obtaining M history life cycle sampling data Si of a peer, i=1, . . . , M; determining the number, n, of Gaussian components in a multidimensional Gaussian Mixture Model to be established, where n?2, and the multidimensional Gaussian Mixture Model denotes a probability distribution of a residual online time of the peer; using Si and n to establish the multidimensional Gaussian Mixture Model; and using the established multidimensional Gaussian Mixture Model to predict the residual online time of the peer. A device for predicting a residual online time of a peer in a P2P network is also provided.