47 results about "Verlet integration" patented technology

Systems and methods for integrating and / or registering a shape sensing fiber in or to various instruments are described herein. Registration fixtures and registration techniques for matching the coordinate system of a fiber to the coordinate system of an elongate instrument or other device are provided. Various systems and methods for integrating a shape sensing fiber into an elongate instrument or other device are also described herein.

A mechanism is provided for unified management of power, performance, and thermals in computer systems. This mechanism incorporates elements to effectively address all aspects of managing computing systems in an integrated manner, instead of independently. The mechanism employs an infrastructure for real-time measurements feedback, an infrastructure for regulating system activity, component operating levels, and environmental control, a dedicated control structure for guaranteed response / preemptive action, and interaction and integration components. The mechanism provides interfaces for user-level interaction. The mechanism also employs methods to address power / thermal concerns at multiple timescales. In addition, the mechanism improves efficiency by adopting an integrated approach, rather than treating different aspects of the power / thermal problem as individual issues to be addressed in a piecemeal fashion.

A receiving method and apparatus for increasing coherent integration length while receiving a positioning signal from transmitters such as GPS satellites. In order to compensate for frequency drifts that may occur in the positioning signal, a hypothesis is made as to the frequency drift, which is inserted into the receiving algorithm. Advantageously, the length of coherent integration can be increased at the expense of reducing the length of incoherent integration while keeping the total integration length the same, the net effect of which is an increase in signal detection sensitivity. The frequency drift hypothesis has any appropriate waveform; for example, approximately linear or exponential. The hypothesized frequency drift can be inserted into the receiver algorithm in any suitable place; for example, the data block may be adjusted for the hypothesized frequency drift, alternatively the reference signal may be adjusted, or the frequency samples of either the data block or the reference signal may be adjusted.

The invention relates to a two-dimensional ocean current Lagrangian coherent structure analytical algorithm. The algorithm is based on a Cauchy-Green right strain tensor, wherein the tensor is obtained in a way that a gradient obtained after particles move for a period of time in a flow field is calculated. Particle movement uses a Runge-Kutta 4 order integration method, and cubic interpolation is adopted for the flow field. In order to improve calculation accuracy, four neighbor points are added on each grid point to calculate the gradient by using a finite difference. The Cauchy-Green right strain tensor is provided with two real eigenvalues, wherein the local maximum value of the large eigenvalue and the local minimum value of the small eigenvalue are seed points of an LCS (Lagrangian Coherent Structure), and the Runge-Kutta 4 order integration is carried out in a non-corresponding characteristic vector field forwards and backwards to obtain a Lagrangian coherent structure. During integration, the direction discontinuity of a character vector is considered. The direction is always kept consistent with the direction of a previous point, and inversion is carried out if the direction differs more than 90 degrees. After one LCS is generated, the LCS seed points in a certain width range of the LCS are set to be ineffective, and an interval between the LCSs is controlled. The Lagrangian coherent structure is an important flow field topological structure, can be effectively applied to the range of ocean current, season-year changes and main flow and branch flow analysis.