One new strategy for a priori choice of regularizing parameters in Tikhonov's regularization

2000 ◽  
Vol 16 (4) ◽  
pp. L31-L38 ◽  
Author(s):  
J Cheng ◽  
M Yamamoto
Keyword(s):  
A Priori ◽  
New Strategy ◽  
Tikhonov’S Regularization

scholarly journals A Priori Approach Of Real-Time Ridesharing Problem With Intermediate Meeting Locations

2014 ◽  
Vol 4 (4) ◽  
pp. 287-299 ◽  
Author(s):  
Kamel Aissat ◽  
Ammar Oulamara
Keyword(s):  
A Priori ◽  
Cost Savings ◽  
Travel Cost ◽  
Cost Rate ◽  
Common Path ◽  
The Core ◽  
New Strategy ◽  
Empirical Performance ◽  
The Common ◽  
Starting Location

Abstract Ridesharing is a mobility concept in which a trip is shared by a vehicle’s driver and one or more passengers called riders. Ridesharing is considered as a more environmentally friendly alternative to single driver commutes in pollution-creating vehicles on overcrowded streets. In this paper, we present the core of a new strategy of the ridesharing system, making it more flexible and competitive than the recurring system. More precisely, we allow the driver and the rider to meet each other at an intermediate starting location and to separate at another intermediate ending location not necessarily their origins and destinations, respectively. This allows to reduce both the driver’s detour and the total travel cost. The term “A priori approach” means that the driver sets the sharing cost rate on the common path with rider in advance. An exact and heuristic approaches to identify meeting locations, while minimizing the total travel cost of both driver and rider are proposed. Finally, we analyze their empirical performance on a set of real road networks consisting of up to 3,5 million nodes and 8,7 million edges. Our experimental results show that our heuristics provide efficient performances within short CPU times and improves the recurring ridesharing approach in terms of cost-savings.

scholarly journals Challenging the 'hidden' assumption in J. L. Schellenberg's hiddenness argument: an exploration into the nature of divine love

2021 ◽  
Author(s):  
Adam T. Blackburn
Keyword(s):  
A Priori ◽  
Divine Love ◽  
Probabilistic Support ◽  
God's Love ◽  
New Strategy ◽  
Perfect Being Theology

In recent years, J. L. Schellenberg has developed and defended a forceful argument for atheism. He argues that the existence of inculpable nonbelief, together with the (a priori) claim that this is not what we would expect if a perfectly loving God exists, provides probabilistic support for atheism. In response, most critics have focused on either denying the existence of inculpable nonbelief offering reasons why it is compatible with the existence of a perfectly loving God. I propose a new strategy for responding to Schellenberg's argument, however, which focuses on clarifying what perfect love entails. I claim that since Schellenberg employs perfect being theology in formulating his argument, he is thereby committed to the assumption that perfect love entails infinite love. I argue, however, that this assumption is unwarranted, and that if it can be shown that God's love is possibly not infinite, then Schellenberg's argument fails.

scholarly journals Challenging the 'hidden' assumption in J. L. Schellenberg's hiddenness argument: an exploration into the nature of divine love

2021 ◽  
Author(s):  
Adam T. Blackburn
Keyword(s):  
A Priori ◽  
Divine Love ◽  
Probabilistic Support ◽  
God's Love ◽  
New Strategy ◽  
Perfect Being Theology

In recent years, J. L. Schellenberg has developed and defended a forceful argument for atheism. He argues that the existence of inculpable nonbelief, together with the (a priori) claim that this is not what we would expect if a perfectly loving God exists, provides probabilistic support for atheism. In response, most critics have focused on either denying the existence of inculpable nonbelief offering reasons why it is compatible with the existence of a perfectly loving God. I propose a new strategy for responding to Schellenberg's argument, however, which focuses on clarifying what perfect love entails. I claim that since Schellenberg employs perfect being theology in formulating his argument, he is thereby committed to the assumption that perfect love entails infinite love. I argue, however, that this assumption is unwarranted, and that if it can be shown that God's love is possibly not infinite, then Schellenberg's argument fails.

scholarly journals Rotaxane CoII Complexes as Field-Induced Single-Ion Magnets

2021 ◽  
Author(s):  
Martina Cirulli ◽  
Enrico Salvadori ◽  
Zhi-Hui Zhang ◽  
Michael Dommett ◽  
Floriana Tuna ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Metal Ion ◽  
A Priori ◽  
Magnetic Behavior ◽  
Zero Field ◽  
Reliable Control ◽  
Chelating Ligands ◽  
Protein Cavity ◽  
New Strategy ◽  
Coordination Behavior

Mechanically chelating ligands have untapped potential for the engineering of metal ion properties by providing reliable control of the number, nature and geometry of donor atoms, akin to how a protein cavity controls the properties of bound metal ions. Here we demonstrate this principle in the context of Co<sup>II</sup>-based single-ion magnets. Using multi-frequency EPR, susceptibility and magnetization measurements we found that these complexes show some of the highest zero field splittings reported for five-coordinate Co<sup>II</sup> complexes to date. The predictable coordination behavior of the interlocked ligands allowed the magnetic properties of their Co<sup>II</sup> complexes to be evaluated computationally <i>a priori </i>and our combined experimental and theoretical approach enabled us to rationalize the observed trends. The predictable magnetic behavior of the rotaxane Co<sup>II</sup> complexes demonstrates that interlocked ligands offer a new strategy to design metal complexes with interesting functionality.

scholarly journals Rotaxane CoII Complexes as Field-Induced Single-Ion Magnets

2021 ◽  
Author(s):  
Martina Cirulli ◽  
Enrico Salvadori ◽  
Zhi-Hui Zhang ◽  
Michael Dommett ◽  
Floriana Tuna ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Metal Ion ◽  
A Priori ◽  
Magnetic Behavior ◽  
Zero Field ◽  
Reliable Control ◽  
Chelating Ligands ◽  
Protein Cavity ◽  
New Strategy ◽  
Coordination Behavior

Mechanically chelating ligands have untapped potential for the engineering of metal ion properties by providing reliable control of the number, nature and geometry of donor atoms, akin to how a protein cavity controls the properties of bound metal ions. Here we demonstrate this principle in the context of Co<sup>II</sup>-based single-ion magnets. Using multi-frequency EPR, susceptibility and magnetization measurements we found that these complexes show some of the highest zero field splittings reported for five-coordinate Co<sup>II</sup> complexes to date. The predictable coordination behavior of the interlocked ligands allowed the magnetic properties of their Co<sup>II</sup> complexes to be evaluated computationally <i>a priori </i>and our combined experimental and theoretical approach enabled us to rationalize the observed trends. The predictable magnetic behavior of the rotaxane Co<sup>II</sup> complexes demonstrates that interlocked ligands offer a new strategy to design metal complexes with interesting functionality.

RRS + LS-SVM: a new strategy for “a priori” sample selection

2007 ◽  
Vol 16 (3) ◽  
pp. 227-234 ◽  
Author(s):  
Bernardo Penna Resende de Carvalho ◽  
Wilian Soares Lacerda ◽  
Antônio de Pádua Braga
Keyword(s):  
A Priori ◽  
Sample Selection ◽  
New Strategy

scholarly journals Scanning Reduction Strategy in MEG/EEG Beamformer Source Imaging

2012 ◽  
Vol 2012 ◽  
pp. 1-19 ◽  
Author(s):  
Jun Hee Hong ◽  
Sung Chan Jun
Keyword(s):  
A Priori ◽  
Computation Time ◽  
Correlated Sources ◽  
Source Imaging ◽  
Good Spatial Resolution ◽  
New Strategy ◽  
Localization Performance ◽  
Priori Information ◽  
Interesting Area ◽  
Robust To Noise

MEG/EEG beamformer source imaging is a promising approach which can easily address spatiotemporal multi-dipole problems without a priori information on the number of sources and is robust to noise. Despite such promise, beamformer generally has weakness which is degrading localization performance for correlated sources and is requiring of dense scanning for covering all possible interesting (entire) source areas. Wide source space scanning yields all interesting area images, and it results in lengthy computation time. Therefore, an efficient source space scanning strategy would be beneficial in achieving accelerated beamformer source imaging. We propose a new strategy in computing beamformer to reduce scanning points and still maintain effective accuracy (good spatial resolution). This new strategy uses the distribution of correlation values between measurements and lead-field vectors. Scanning source points are chosen yielding higher RMS correlations than the predetermined correlation thresholds. We discuss how correlation thresholds depend on SNR and verify the feasibility and efficacy of our proposed strategy to improve the beamformer through numerical and empirical experiments. Our proposed strategy could in time accelerate the conventional beamformer up to over 40% without sacrificing spatial accuracy.

Complete In-plane Elastic Characterisation under Tensile Tests of Angle-Ply Laminates Composed of Polymer-Matrix Layers

2002 ◽  
Vol 10 (7) ◽  
pp. 483-492
Author(s):  
E. Valot ◽  
P. Vannucci ◽  
G. Verchery
Keyword(s):  
Elastic Properties ◽  
Plate Theory ◽  
A Priori ◽  
Experimental Tests ◽  
Tensile Tests ◽  
Simple Method ◽  
Elementary Layer ◽  
Specific Direction ◽  
New Strategy ◽  
Angle Ply Laminates

In this paper we present a new strategy to completely characterise the in-plane elastic properties of a large range of angle-ply laminates using only unidirectional tests. We consider laminates having the same number of identical plies in the α and – α directions. This new method uses some preceding results found by Verchery for orthotropic laminates, namely the conditions of existence of a specific direction ω, in which the shear-extension coupling is null. The characterisation of the laminate is then made using the results of three tensile tests: two in the orthotropy axes, and the third one in the ω direction, in order to have always a pure one-dimensional state of stress. We show that for the most common unidirectional fibre-reinforced materials, the angle ω is, in most cases, close to the α direction of the fibres. This result permits a complete experimental characterisation of the laminate, which then does not need any a priori knowledge of the elastic properties of the elementary layer. In addition, it provides a simple method to verify the predictions of the laminate behaviour obtained by the Classical Laminated Plate Theory (CLPT) when the elementary layer is completely known. The paper ends with numerical examples and with the results of some experimental tests.

scholarly journals Intelligent polymer droplets eject membranes and drive multimodal-propulsion  of floating objects            

2021 ◽  
Author(s):  
Pietro Ferraro ◽  
Sara Coppola ◽  
Veronica Vespini
Keyword(s):  
Intelligent Systems ◽  
A Priori ◽  
Polymer Membranes ◽  
Marangoni Effect ◽  
Thin Polymer ◽  
Water Cleaning ◽  
New Strategy ◽  
Floating Objects ◽  
First Time ◽  
Intelligent Polymer

Self-propulsion of bodies floating in water is of great interest for developing new robotic and intelligent systems at different scales. Frequently, the propulsion concept has been related to the Marangoni effect often demonstrated through surfactants. Here we show for the first time that polymer droplets, made of appropriate combination of solvent/polymer, can represent a new strategy to activate different functionalities on water. We demonstrate that, by dispensing such intelligent polymer droplets, it is possible to propel motions with different modalities of any class of floating objects made of different shapes/materials. On demand propulsion and self-rotation (free and along a pivot) are reported for different objects. Furthermore, we discovered that meanwhile the object is propelled, polymer membranes can be created through the spreading phenomena on water’s surface. Such thin polymer membranes can cover extensive areas and follow predefined paths as function on the motion assumed. We report preliminary example of possible exploitation of these new combined functionalities induced by the intelligent polymer droplets for propulsion of multiple objects and water cleaning through particles’ capture. In perspective, the droplet can be endowed with intelligence to control the various operations by knowing a priori the exact location of the delivery and its volume.

Application of cross correlation to HREM images of surfaces

1987 ◽  
Vol 45 ◽  
pp. 754-755
Author(s):  
D. E. Luzzi ◽  
L. D. Marks ◽  
M. I. Buckett
Keyword(s):  
Cross Correlation ◽  
A Priori ◽  
Matrix Material ◽  
Correlation Method ◽  
Accurate Knowledge ◽  
Complex Image ◽  
Fourier Filtering ◽  
The Matrix ◽  
Low Pass ◽  
Data Reduction Technique

As the HREM becomes increasingly used for the study of dynamic localized phenomena, the development of techniques to recover the desired information from a real image is important. Often, the important features are not strongly scattering in comparison to the matrix material in addition to being masked by statistical and amorphous noise. The desired information will usually involve the accurate knowledge of the position and intensity of the contrast. In order to decipher the desired information from a complex image, cross-correlation (xcf) techniques can be utilized. Unlike other image processing methods which rely on data massaging (e.g. high/low pass filtering or Fourier filtering), the cross-correlation method is a rigorous data reduction technique with no a priori assumptions.We have examined basic cross-correlation procedures using images of discrete gaussian peaks and have developed an iterative procedure to greatly enhance the capabilities of these techniques when the contrast from the peaks overlap.

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