Abstract: Graph-based modeling apparatus and techniques are disclosed. Based on a model including model nodes that represent components of a modeled system, operational dependencies between model nodes, and model edges that interconnect the nodes and represent relationships between the components in the modeled system, subset computations are performed to compute subsets of the model nodes that can impact operational dependencies between other model nodes. When the model changes, a determination is made as to whether an incremental subset computation should be performed for one or more particular operational dependencies between model nodes in the changed model, and if so, an incremental subset computation is performed. Otherwise, a full subset computation or no subset computation might be performed. In this manner, model changes are considered on a case-by-case basis to determine an extent, if any, to which subsets should be re-computed.

Abstract: New cutting structures for roller cone drill bits are disclosed. In one aspect, a drill bit includes a bit body, roller cones attached to the bit body and able to rotate with respect to the bit body, and a plurality of cutting elements disposed on each of the roller cones, such that axial force on the bit during drilling is substantially balanced between the cones. In another aspect, a drill bit includes a plurality of cutting elements disposed on each roller cone such that the amount of work performed by each cone during drilling is substantially the same as the amount of work performed by each of the other cones. In yet another aspect, a drill bit includes a plurality of cutting elements disposed on each roller cone such that distribution of axial force on the bit is optimized. Additional aspects of the invention are also disclosed.

Abstract: Methods, systems and computer programs for producing integrated circuits (IC) that contain an electronic component with time-dependent impedance are provided. According to one method, time-dependent impedance values for the electronic component are obtained. These time-dependent impedance values are time-dependent because they can change over time, such as when an input/output buffer starts switching, and are used to create a model of the electronic component. The model includes a variable impedance and a variable voltage source. The model is created by calculating a current through the variable impedance and then assigning the obtained impedance values to the impedance. Additionally, values are assigned to the variable voltage source such that the current through the variable impedance with the new assigned values is equal to the current thorough the variable impedance before the assignment of the time-dependent impedance values.

Abstract: Residue perturbation is used for enforcing passivity of a linear response model of an electrical component having n>1 ports. According to an exemplary embodiment, a modal perturbation approach can be used, which allows weighted perturbation of the individual modes by the inverse of the corresponding eigenvalues. This provides superior results if the admittance or impedance matrix of the device has a large eigenvalue spread.

Abstract: The invention relates to the simulation method and apparatus used in plasma modeling. It includes a method to transform transient formulations of the phenomenological plasma model into a quasi-stochastic spatial formulation. Specifically, the invention aids in decreasing computational time for the modeling of plasma in a plasma processing system, particularly those involving two different time-based parameters. The invention is particularly described in connection with plasma simulations used for the optimization dual-frequency capacitively-coupled plasma etching systems.

Abstract: A deployment activity model is automatically generated from a deployment topology model. The operations to automatically generate the deployment activity model may be visible or “under the covers.” Regardless of visibility, a deployment model tool traverses a representation (e.g., one or more data structures) of the one or more diagrams of the deployment topology model. The deployment model tool begins creating preliminary representations of a deployment activity model until representation of a valid deployment activity model is created. Although the preliminary representations (assuming the first traversal attempt of the deployment topology model is unsuccessful) are discarded in some embodiments, other embodiments store the representations of the preliminary representations for analysis (e.g., analysis for the tool to learn, analysis to discover values for automatically defining attributes, etc.).

Abstract: A method for modelling the migration of reactant in a subsurface petroleum system is described. The method comprises in part generating a mesh for an area of the petroleum system. The mesh comprises a plurality of nodes, with each node representing a point in space in the area. The method also comprises calculating one or more variables representing one or more physical characteristics at each node in the area and determining the migration of reactant in the petroleum system based on the one or more variables. The method can also handle multiple reactant phases and non-static meshes.

Abstract: A software application is provided for a user to select a backed up data file and specify a task to be performed by an online service provider on the selected file. The application automatically connects to the online service provider and uploads the selected file for the online service provider to perform the task. Tasks that can be performed include printing, sharing, viewing, playing and archiving the selected file. Task preferences, user settings and user information can also be specified by the user and uploaded to the online service provider. Automatic connection to the online service provider can be via default setting, selected file type, or specified task. Alternatively, the user can designate which service provider is to perform the task. Payment for the task can be accomplished via bundled credits or by other payment mechanisms.

Abstract: Each of a plurality of dimension coordinates corresponding to a report query has a finer grain and a coarser grain. A subset of the dimension coordinates are dimension coordinates for which there is ambiguity as to what coarser grain value should be associated with the finer grain value. For every unique finer grain value of the dimension coordinates of the subset, it is determined what coarser grain value to associate with all dimension coordinates of the subset having that finer grain value. The determined coarser grain value is the coarser grain value of one of the dimension coordinates, of the subset, having that finer grain value. For each of the dimension coordinates of the plurality of dimension coordinates not in the subset, the coarser grain value associated with that dimension coordinate is the coarser grain value of that dimension coordinate. A report is generated in view of the plurality of dimension coordinates and their associated coarser grain values.

Abstract: The control device of a movement simulator, between its input formed of a control signal and its output formed of a measured magnitude among its speed, its position and its acceleration, by a transfer function B(z?1)/A(z?1) includes a corrector synthesized from the modelling of the movement simulator and equivalent to a RST controller. The controller includes a reference input, a retro-action input whereon is applied the measured magnitude and an output producing the control signal. The transfer function between the reference input of the controller and the measured magnitude is H(z?1)/W(z?1). The device has a reference filter whose input is a sinusoidal reference signal c(t) at a frequency wc and applying at output a filtered reference signal on the reference input of the controller. The reference filter has a transfer function Rr(z?1)/Fr(z?1), whose denominator and numerator are adapted to ensure, for the frequency wc, effective tracking by the movement simulator of the sinusoidal reference.