Abstract: Systems and methods are provided for simulating quantile behavior of a physical system. A plurality of parameter samples to a physical system are accessed and a subset of the parameter samples are identified, each of the plurality of parameter samples including a variation of parameters for the physical system. The physical system is simulated based on the subset of the parameter samples to generate simulation results, each of the subset of the parameter samples corresponding to a respective one of the simulation results. A neural network is trained to predict the simulation results based on the subset of the parameter samples.

Abstract: Systems and methods are provided for the refining and coarsening of a polyhedra mesh. The refinement includes identifying a plurality of polyhedral cells within a polyhedra mesh. A plurality of parent faces having a plurality of parent face edges are extracted for each polyhedral cell within the polyhedra mesh. For each parent face, a plurality of nodes are defined and connected either isotropically or anisotropically. A plurality of non-overlapping child faces are generated with a perimeter defined by a combination of parent face edges and child face edges. A plurality of child cells are generated from the connection of child faces of the plurality of non-overlapping child faces. Subsequent coarsening of the plurality of child cells occurs by the simultaneous agglomeration into each respective parent cell.

Abstract: Systems and methods are provided for receiving, by a simulation model, a thermal gradient and a cooling rate associated with a 3D printing material as inputs for the simulation model. The systems and methods further include generating, by the simulation model executed by a processing system, characteristics associated with the 3D printing material as outputs of the simulation model based on the thermal gradient and the cooling rate associated with the 3D printing material.

Abstract: Computer-implemented systems and methods for updating a polygonal mesh representation of a model are provided. A model comprises a set of topologies, and a meshing state is maintained for each topology of the set of topologies. The meshing state indicates, for a given topology, whether a polygonal mesh exists and is valid. A change made to the model is determined, where the change comprises a modification to a geometry of the model or a modification to mesh settings of a polygonal mesh representation of the model. One or more topologies of the set of topologies that are affected by the change are determined, and the meshing state for the affected one or more topologies is updated. Based on the one or more updated meshing states, a set of meshing operations needed to bring the polygonal mesh representation of the model up-to-date is determined.

Abstract: Systems and methods are provided for identifying a wire of a plurality of wires to be adjusted to mitigate effects of electromigration. A segment electromigration stress value for each segment of a wire is determined for a wire of a circuit in a circuit design. A wire electromigration stress value for the wire is determined as a function of the segment electromigration stress values of segments of the wire. A ranked list of two or more wires of the circuit is displayed according the wire electromigration stress values of the two or more wires.

Abstract: Computer-implemented systems and methods for preparing a virtual three-dimensional (3D) object for 3D printing are provided. A hollowed-out representation of an input model is generated. The input model defines a solid virtual 3D object, and the hollowed-out representation comprises a shell and an internal volume that is a void. The internal volume is meshed to generate a polygonal mesh representation of the internal volume. A lattice microstructure corresponding to the polygonal mesh representation is generated by (i) replacing each edge of the polygonal mesh representation with a solid part, and (ii) uniting the solid parts to form the lattice microstructure. A lightweight representation of the input model is generated, where the lightweight representation comprises the shell and the lattice microstructure.

Abstract: Systems and methods are provided for simulating high-cycle fatigue of a rotating component. A first three-dimensional geometric representation of a rotating component is received, where the first three-dimensional geometric representation is indicative of the rotating component during operation. A three-dimensional fluid flow metric is computed at points of the first three-dimensional geometric representation and stored in a first data structure. A second three-dimensional geometric representation of the rotating component is received, where the second three-dimensional geometric representation is indicative of the rotating component in a still configuration. A static metric is computed at points of the second three-dimensional geometric representation and stored in a second data structure. A combined data structure is populated based on the three-dimensional fluid flow metric from the first data structure and the static metric from the second data structure.

Abstract: Systems and methods are provided for providing real-time interactive design and simulation of a physical system to generate comparisons of varying system configurations under different physical conditions. A display is generated on a graphical user interface that displays a part in a physical system according to characteristic data. An initial simulation of the physical system is executed to determine an initial value for a metric of the initial design. The initial value is displayed on the graphical user interface. A system configuration change is received through a user interface manipulation to a first characteristic of the characteristic data or the environment condition. The simulation of the physical system is recalculated to determine a second value for the metric based on the manipulated first characteristic, the second value for the metric being displayed on the graphical user interface along with initial value in real time relative to the received manipulation.

Abstract: Systems and methods are provided for calculating a power characteristic of an integrated circuit design. For each standard cell of a gate-level netlist, a path length and a set of attributes are computed. For each leaf-level instance of a register-transfer level (RTL) netlist, a path length and a set of attributes are computed. The standard cells are partitioned into first subsets, each of the first subsets containing standard cells with a same path length and a same set of attributes. For each first subset, a relative percentage for each type of standard cell included in the first subset is calculated. The leaf-level instances are partitioned into second subsets. For each pair of corresponding first and second subsets, standard cells are associated with the leaf-level instances of the second subset based on the relative percentages. A power characteristic of the RTL netlist is calculated based on the associated standard cells.

Abstract: Data is received that characterizes an integrated circuit and which includes a plurality of Standard Test Interface Language (STIL) codes and at least one file defining physical and/or logical parameters of the integrated circuit. Thereafter, using the received data, a power integrity analysis of the integrated circuit is performed to estimate power induced noise in a double glitch capture mode. Data is then provided that characterizes the performed double glitch capture mode power integrity analysis of the integrated circuit. Related apparatus, systems, techniques and articles are also described.

Abstract: Computer-implemented systems and methods for modeling low-dropout (LDO) regulators and charge pumps are provided. A relationship between an output voltage of an LDO regulator or charge pump and a loading condition is determined. A frequency-domain analysis is performed at multiple frequencies to determine an impedance function representative of an impedance of the LDO regulator or charge pump at each of the multiple frequencies. A vector-fitting algorithm is applied to approximate the impedance function using a plurality of poles and residues. A circuit is synthesized based on the plurality of poles and residues. A model for the LDO regulator or charge pump is generated, where the model includes the synthesized circuit and components that model the relationship between the output voltage and the loading condition.

Abstract: Systems and methods are provided for reducing processing time of an automated engineering design. A repository of engineering design rule violations and corresponding waiver decisions regarding the design rule violations is accessed. A clustering operation is performed on violations in the repository to form clusters of violations based on one or more characteristics of the violations. Waiver decisions associated with violations in each cluster are evaluated to assign a risk level to each cluster. A plurality of detected engineering design rule violations associated with an engineering design are identified. Each of the detected violations is iterated through to determine which cluster that detected violation belongs. Detected violations associated with low risk clusters are automatically to approve the engineering design.

Abstract: Data is received that characterizes a chip in the package system (CPS) having a plurality of wires and vias. Thereafter, using the received data, a chip power calculation is performed. The chip power calculated is used to generate a thermal-aware power map. Further, package and system level thermal analysis is performed using the power map to generate a tile-based CPS thermal profile. A plurality of chip finite element sub-models are then generated that each correspond to a different tile. A thermal field solution is solved for each sub-model so that, for each wire, wire temperature rises are extracted from the corresponding the chip sub-model analysis and combined with temperature values from the CPS thermal profile. This extracting and combining is then used to generate a back-annotation file covering each metal wire and via in the CPS.

Abstract: Systems and methods are provided for generating a surface that approximates one or more CAD surfaces. An input that approximates the one or more CAD surfaces via a plurality of triangles is received. A mesh of equilateral triangles is generated on the input, with the mesh including vertices that lie on the input. Vertices of the mesh are moved to generate a control mesh, the control mesh having a corresponding limit surface that passes through all of the vertices of the mesh. A local refinement is performed on one or more regions of the control mesh that have an error that is greater than a threshold value, where the local refinement causes the limit surface of the control mesh to more closely approximate the one or more CAD surfaces. The mesh is parameterized to generate a two-dimensional (2D) representation of the mesh.

Abstract: Systems and methods are provided for modeling fluid flow in a turbomachine. A specification of a system including first and second blade rows is received. A wake profile from the first blade row is imposed on the second blade row to approximate an influence of the first blade row on the second blade row. Governing flow equations for the fluid flow in the second blade row are transformed in time. Flow variables of the transformed governing flow equations are represented as a Fourier series, and the Fourier series representation is substituted into the transformed governing flow equations to obtain a modified form of the transformed governing flow equations. A pseudo-time term is introduced into the modified form of the transformed governing flow equations. The modified form of the transformed governing flow equations is solved using the steady-state solution method to model the fluid flow in the second blade row.

Abstract: Systems and methods are provided for simulating an electrical characteristic of an electronic device having input ports and output ports. A device frequency response data structure is accessed that contains data associated with a plurality of port-to-port frequency responses of the electronic device, each port-to-port frequency response being associated with a plurality of frequencies. A QR decomposition is performed based on data from the frequency response data structure. A subset of the port-to-port frequency responses is selected based on the QR decomposition. A set of common poles is identified using the selected subset of port-to-port frequency responses, and a model of time domain behavior of the electronic device is generated using the set of common poles.

Abstract: Method and apparatus for reducing chemical reaction mechanisms are disclosed. A method comprises obtaining data for one or more chemical species in a chemical reaction model from a database, the database including properties of the one or more chemical species; grouping the chemical species in a chemical reaction model into one or more isomer groups according to molecular properties of the chemical species; assigning a representative isomer to at least one isomer group; replacing, in one or more chemical reaction equations of the chemical reaction model, one or more groups of chemical species with a corresponding representative isomer; and executing the chemical reaction model by an apparatus to determine results.

Abstract: Rapid calculation of magnetostriction effects can consist of calculating a stress field and a magnetic field in a structure by determining a magnetic field on the magnetic mesh, determining a magnetostriction from the magnetic field, applying the magnetostriction to the mechanical mesh, determining a stress field on the mechanical mesh, determining an inverse magnetostriction from the stress field, applying the inverse magnetostriction to the magnetic mesh, and determining a new magnetic field on the magnetic mesh by accounting for the inverse magnetostriction. Calculations can be based on data representing a structure, including a magnetic mesh, a mechanical mesh, and a plurality of material properties. After calculation is completed, data characterizing the calculated stress field and magnetic field for the structure can be provided as output. Related apparatus, systems, techniques, methods and articles are also described.

Abstract: Systems and methods are provided for modeling fluid flow in a turbomachine. A specification of a system including at least a stator and a rotor of a turbomachine is received. The stator is coupled to the rotor via a profile-transformation (PT) interface. A flow profile for fluid flow across the PT interface is expanded or compressed based on a pitch ratio between the stator and the rotor. Flow variables of governing flow equations for the fluid flow in the system are represented as a Fourier series with spatially-varying Fourier coefficients. The Fourier series representation is substituted into the governing flow equations to obtain a modified form of the governing flow equations. The modified form of the governing flow equations is solved using a steady-state solution method to model the fluid flow in the system. The modeling utilizes an implicit solution discretization across the PT interface.

Abstract: Systems and methods are provided for executing a simulation of a physical system that includes a plurality of objects representing physical entities or phenomena. Parameters of objects currently present in a simulation are evaluated. When one of the parameters is in an invalid state, a first multi-layer context menu is provided having multiple selectable options on each layer on a graphical user interface, where a first layer includes a highlight indicating that an object needs fixed, and where a subsequent layer includes a highlight indicating an identity of the object that needs fixed. The objects currently present in the simulation are evaluated based on a task to be performed. When a required object for the task to be performed is missing from the simulation, a second multi-layer context menu having multiple selectable options on each layer is provided.