نتایج جستجو برای: elastic impedance log

تعداد نتایج: 185107  

Journal: :J. Applied Mathematics 2013
Mattia Zanon Giovanni Sparacino Andrea Facchinetti Mark Talary Andreas Caduff Claudio Cobelli

Continuous glucose monitoring (CGM) by suitable portable sensors plays a central role in the treatment of diabetes, a disease currently affecting more than 350 million people worldwide. Noninvasive CGM (NI-CGM), in particular, is appealing for reasons related to patient comfort (no needles are used) but challenging. NI-CGM prototypes exploiting multisensor approaches have been recently proposed...

2012
Dominic Lakatos Daniel Rüschen Justin Bayer Jörn Vogel Patrick van der Smagt

To approach robustness and optimal performance, biological musculoskeletal systems can adapt their impedance while interacting with their environment. This property has motivated modern robotic designs including variable-impedance actuators and control methods, based on the capability to vary visco-elastic properties actively or passively. Even though variable-impedance actuation and impedance ...

2014
Frédéric Crevecoeur Stephen H. Scott

Feedback delays are a major challenge for any controlled process, and yet we are able to easily control limb movements with speed and grace. A popular hypothesis suggests that the brain largely mitigates the impact of feedback delays (∼50 ms) by regulating the limb intrinsic visco-elastic properties (or impedance) with muscle co-contraction, which generates forces proportional to changes in joi...

Journal: :iranian journal of oil & gas science and technology 2014
hamid reza ansari reza motafakkerfard mohammad ali riahi

seismic inversion is a method that extracts acoustic impedance data from the seismic traces. sourcewavelets are band-limited, and thus seismic traces do not contain low and high frequency information.therefore, there is a serious problem when the deterministic seismic inversion is applied to real dataand the result of deterministic inversion is smooth. low frequency component is obtained from w...

2004
Jerry E. Pratt Benjamin T. Krupp Christopher J. Morse Steven H. Collins

Exoskeletons that enhance human strength, endurance, and speed while being transparent to the wearer are feasible. In order to be transparent, the exoskeleton must determine the user’s intent, apply forces when and where appropriate, and present low impedance to the wearer. We present a one degree of freedom exoskeleton called the RoboKnee which achieves a high level of transparency. User inten...

2006
C. AGUERREBERE G. CAPDEHOURAT M. DELBRACIO M. MATEU

We present a biometric system performing both, verification and identification, implementing automatic face recognition. The algorithm is based on Elastic Bunch Graph Matching [1]. EBGM is a technique that uses local information extracted with Gabor filters for discrimination. CSU implementation [2] was used as the main reference of this work. The results are comparable with those of the state ...

2000
David W. Robinson Gill A. Pratt

We present a hydro-elastic actuator that has a linear spring intentionally placed in series between the hydraulic piston and actuator output. The spring strain is measured to get an accurate estimate of force. This measurement alone is used in PI feedback to control the force in the actuator. The spring allows for high force fidelity, good force control, minimum impedance, and large dynamic ran...

2005
Derek Rinderknecht Anna Iwaniec Hickerson Morteza Gharib

Over the past two decades, a variety of micropumps have been explored for various applications in microfluidics such as control of picoand nanoliter flows for drug delivery as well as chemical mixing and analysis. We present the fabrication and preliminary experimental studies of flow performance on the micro impedance pump, a previously unexplored method of pumping fluid on the microscale. The...

Journal: :Applied sciences 2023

The study aims to implement a high-resolution Extended Elastic Impedance (EEI) inversion estimate the petrophysical properties (e.g., porosity, saturation and volume of shale) from seismic well log data. resolves pitfall basic EEI in inverting below-tuning resolution, dimensionality absolute value are improved by employing stochastic perturbation constrained integrated energy spectra attribute ...

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