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Bundle Adjustment using Conjugate Gradients with Multiscale Preconditioning

Bundle adjustment is a key component of almost any feature based 3D reconstruction system, used to compute accurate estimates of calibration parameters and structure and motion configurations. These problems tend to be very large, often involving thousands of variables. Thus, efficient optimization methods are crucial. The traditional Levenberg Marquardt algorithm with a direct sparse solver can be

The development and validation of a simulation tool for assessment of the use of and costs for energy in paper drying processes

This report includes a description of a newly developed simulation tool for energy mapping of different paper drying processes. The simulation tool includes models for three different types of paper dryers and for a coating station and various units used for heat recovery. The models were developed in the block oriented simulation program Extend. The Extend software is briefly described and the eq

Spatial Frequency Sensitivity Differences between Adults of Good and Poor Reading Ability

purpose. To determine whether normal adults of good and poor reading ability exhibit different patterns of sensitivity to spatial frequency, as previously found between dyslexic and nondyslexic control subjects. methods. The visual acuity, spatial frequency sensitivity, and reading ability of 96 normal, nondyslexic adults was assessed. Participants were ranked according to reading ability. The to

A component-based approach to the design of networked control systems

Component-based techniques revolve around composable, reusable software objects that shield the application level software from the details of the hardware and low-level software implementation and vice versa. Components provide many benefits that have led to their wide adoption in software and middleware developed for embedded systems: They are well-defined entities that can be replaced without a

Interference Suppression in Non-coherent Time-Hopping IR-UWB Ranging

Ranging requires detection of the first arriving signal component. The accuracy of time-of-arrival-based range estimation is greatly degraded in the presence of multi-user interference (MUI). We develop a method that applies a nonlinear filter on received signal energy to suppress multiuser interference. Then, leading signal path is tracked via an iterative searchback algorithm. The method is test

A note on Isomorphism and Identity

This note argues that, insofar as contemporary mathematics is concerned, there is overwhelming evidence that if mathematical objects are structures, then isomorphism should not be taken as their identity condition. This goes against a common version of structuralism in the philosophical literature. Four areas are presented in which identifying isomorphic structures or objects leads to contradictio