A5026426772- Iterative Learning Control Systems
- Advanced Radiotherapy Techniques
- Distributed Control Multi-Agent Systems
- Advanced Control Systems Optimization
- Advanced machining processes and optimization
- Piezoelectric Actuators and Control
- Radiomics and Machine Learning in Medical Imaging
- Neural Networks Stability and Synchronization
- Medical Imaging Techniques and Applications
- Robotic Path Planning Algorithms
- Advances in Oncology and Radiotherapy
- Cold Atom Physics and Bose-Einstein Condensates
- Advanced Surface Polishing Techniques
- Advanced Vision and Imaging
- Radiation Dose and Imaging
- Stability and Control of Uncertain Systems
- Welding Techniques and Residual Stresses
- Radiation Therapy and Dosimetry
- Robotics and Sensor-Based Localization
- Optical measurement and interference techniques
- Advanced Control Systems Design
- Lung Cancer Diagnosis and Treatment
- Neural Networks and Applications
- Head and Neck Cancer Studies
- Control Systems and Identification
University of California, San Diego
2015-2024
Colorado School of Mines
2014-2024
Varian Medical Systems (United States)
2023-2024
Texas Children's Hospital
2023
Western Health and Social Care Trust
2022
Moores Cancer Center
2018-2022
United States Pharmacopeial Convention
2022
Sutter Health
2021
University of California San Diego Medical Center
2019
Louisiana State University
2002-2014
In this paper, the iterative learning control (ILC) literature published between 1998 and 2004 is categorized discussed, extending earlier reviews presented by two of authors. The papers includes a general introduction to ILC technical description methodology. selected results are reviewed, into subcategories within broader division application-focused theory-focused results.
For fractional-order differentiator s/sup r/ where r is a real number, its discretization key step in digital implementation. Two methods are presented. The first scheme direct recursive of the Tustin operator. second one method using Al-Alaoui operator via continued fraction expansion (CFE). approximate minimum phase and stable. Detailed procedures short MATLAB scripts given. Examples included for illustration.
In this paper we study ℓth-order (ℓ⩾3) consensus algorithms, which generalize the existing first-order and second-order algorithms in literature. We show necessary sufficient conditions under each information variable its higher-order derivatives converge to common values. also present idea of with a leader introduce concept an model-reference problem, where high-order not only reach consensus, but solution prescribed dynamic model. The effectiveness these is demonstrated through simulations...
To demonstrate knowledge-based 3D dose prediction for external beam radiotherapy.Using previously treated plans as training data, an artificial neural network (ANN) was trained to predict a matrix based on patient-specific geometric and planning parameters, such the closest distance (r) target volume (PTV) organ-at-risks (OARs). Twenty-three prostate 43 stereotactic radiosurgery/radiotherapy (SRS/SRT) cases with at least one nearby OAR were studied. All planned volumetric-modulated arc...
This technical note proposes a robust iterative learning control (ILC) strategy to regulate iteratively-operated, finite-duration nonrepetitive systems characterized by iteration-varying uncertainties in initial states, external disturbances, plant model matrices and desired reference trajectories. Our convergence analysis exploits results on input-to-state stability of discrete parameterized systems. For class multiple-input, multiple-output discrete-time linear systems, with all bounded,...
Artificial neural networks are explained, and the different types described. Three tasks for which they suitable discussed. They pattern classification associative memory, self-organization feature extraction, optimization.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
We have produced Bose-Einstein condensates in a ring-shaped magnetic waveguide. The few-millimeter diameter, nonzero-bias ring is formed from time-averaged quadrupole ring. Condensates that propagate around the make several revolutions within time it takes for them to expand fill shape ideally suited studies of vorticity multiply connected geometry and promising as rotation sensor.
We report on Kerr nonlinearity and dispersive optical bistability of a Fabry-Perot resonator due to the displacement ultracold atoms trapped within. In driven resonator, such collective motion is induced by forces acting upon up 10(5) 87Rb prepared in lowest band one-dimensional intracavity lattice. The longevity atomic motional coherence allows for strongly nonlinear optics at extremely low cavity photon numbers, as demonstrated observation both branches numbers below unity.
Abstract Learning control is an iterative approach to the problem of improving transient behavior for processes that are repetitive in nature. In this article, we present some results on learning control. A complete review literature given first. Then, a general formulation given. Next, analysis case linear, time‐invariant plants and controllers. This offers: (1) insight into nature solution by deriving sufficient convergence conditions; (2) linear systems based parameter estimation; (3)...
Purpose: Severe artifacts in kilovoltage‐CT simulation images caused by large metallic implants can significantly degrade the conspicuity and apparent CT Hounsfield number of targets anatomic structures, jeopardize confidence anatomical segmentation, introduce inaccuracies into radiation therapy treatment planning process. This study evaluated performance first commercial orthopedic metal artifact reduction function (O‐MAR) for therapy, investigated its clinical applications planning....
To establish the feasibility of dosimetric compliance criteria RTOG 1308 trial through testing against Intensity Modulation Radiation Therapy (IMRT) and Passive Scattering Proton (PSPT) plans. Twenty-six lung IMRT 26 proton PSPT plans were included in study. Dose Volume Histograms (DVHs) for targets normal structures analyzed. The quality was assessed using a knowledge-based engineering tool. Most achieved. deviation unacceptable rates less than 10 % most criteria; however, rate more 20...
Implementing new online adaptive radiation therapy technologies is challenging because extra clinical resources are required particularly expert contour review. Here, we provide the first assessment of Varian's Ethos™ platform for prostate cancer using no manual edits after auto-segmentation to minimize this impact on efficiency.Twenty-five patients previously treated at our clinic were re-planned an emulator. Clinical target volumes (CTV) included intact and proximal seminal vesicles. The...
A new tuning method for proportional-integral-derivative (PID) controller design is proposed a class of unknown, stable, and minimum phase plants. We are able to PID ensure that the Bode plot flat, i.e., derivative w.r.t. frequency zero, at given called "tangent frequency" so closed-loop system robust gain variations step responses exhibit an iso-damping property. At frequency," Nyquist curve tangentially touches sensitivity circle. Several relay feedback tests used identify plant tangent in...
In this paper we study l <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">th</sup> order (l >= 3) consensus algorithms, which generalize the existing first-order and second-order algorithms in literature. We will show sufficient conditions under each information variable their higher-order derivatives converge to common values. present idea of with a leader introduce concept an model-reference problem, where high-order not only reach but also...
Abstract This paper proposes an iterative learning control (ILC) scheme to ensure trajectory‐keeping in satellite formation flying. Since satellites rotate the earth periodically, position‐dependent disturbances can be considered time‐periodic disturbances. observation motivates idea of repetitively compensating for external such as solar radiation, magnetic field, air drag, and gravity forces iterative, orbit‐to‐orbit manner. It is shown that robust ILC effectively utilized trajectory...