Rui Zou

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In order to assess the possible time-varying properties of renal autoregulation, time-frequency and time-scaling methods were applied to renal blood flow under broad-band forced arterial blood pressure fluctuations and single-nephron renal blood flow with spontaneous oscillations obtained from normotensive (Sprague-Dawley, Wistar, and Long-Evans) rats, and(More)
We extend a recently developed algorithm that expands the time-varying parameters onto a single set of basis functions, to multiple sets of basis functions. This feature allows the capability to capture many different dynamics that may be inherent in the system. A single set of basis functions that has its own unique characteristics can best capture(More)
We extend a recently developed time invariant (TIV) model order search criterion named the optimal parameter search algorithm (OPS) for identification of time varying (TV) autoregressive (AR) and autoregressive moving average (ARMA) models. Using the TV algorithm is facilitated by the fact that expanding each TV coefficient onto a finite set of basis(More)
We introduce a new method to estimate reliable time-varying (TV) transfer functions (TFs) and TV impulse response functions. The method is based on TV autoregressive moving average models in which the TV parameters are accurately obtained using the optimal parameter search method which we have previously developed. The new method is more accurate than the(More)
The task of locating a source based on the measurements of the signal emitted/emanating from it is called the source-seeking problem. In the past few years, there has been a lot of interest in deploying autonomous platforms for source-seeking. Some of the challenging issues with implementing autonomous source-seeking are the lack of a priori knowledge about(More)
Compared with the CSMA based MAC protocols, the slotted reservation solutions could be more adaptable for VANETs. However, the high mobility and mobile hidden terminal (MHT) issues in vehicular environments cause a challenge of efficient and scalable slotted scheduling for TDMA MAC protocols. This paper proposes a novel near collision free reservation (CFR)(More)
For trauma and orthopedic surgery, maneuvering a mobile C-arm fluoroscope into a desired position to acquire an X-ray is a routine surgical task. The precision and ease of use of the C-arm becomes even more important for advanced interventional imaging techniques such as parallax-free X-ray image stitching. Today's standard mobile C-arms have been modeled(More)
Recent experimental and computational technological advancements allow for detailed temporal and spatial representations of cells. This has made the development of spatio-temporal extensions to traditional systems biology more tractable. We discuss the theoretical biochemical and biophysical fundamentals that lead to computer based spatial and dynamical(More)
In this paper, we address the problem of seeking a source that emits signal described by a function that is radially symmetric, and decays with increasing distance in a complex environment with obstacles. Electromagnetic signals, acoustic signals, vapor emission, etc, are examples of such signals. In contradistinction to existing techniques, we use a(More)