Results 1  10
of
1,869
GENERIC FOCK QUANTUM MARKOV SEMIGROUPS WITH INSTANTANEOUS STATES
"... Abstract. We construct a generic quantum Markov semigroup with instantaneous states exploiting the invariance of the diagonal algebra and the explicit form of the action of the pregenerator on offdiagonal matrix elements. Our semigroup acts on a unital C∗algebra and is strongly continuous on th ..."
Abstract
 Add to MetaCart
Abstract. We construct a generic quantum Markov semigroup with instantaneous states exploiting the invariance of the diagonal algebra and the explicit form of the action of the pregenerator on offdiagonal matrix elements. Our semigroup acts on a unital C∗algebra and is strongly continuous
Teleporting an Unknown Quantum State via Dual Classical and EPR Channels
, 1993
"... An unknown quantum state jOEi can be disassembled into, then later reconstructed from, purely classical information and purely nonclassical EPR correlations. To do so the sender, "Alice," and the receiver, "Bob," must prearrange the sharing of an EPRcorrelated pair of particles. ..."
Abstract

Cited by 649 (22 self)
 Add to MetaCart
An unknown quantum state jOEi can be disassembled into, then later reconstructed from, purely classical information and purely nonclassical EPR correlations. To do so the sender, "Alice," and the receiver, "Bob," must prearrange the sharing of an EPRcorrelated pair of particles
Theory for the development of neuron selectivity: orientation specificity and binocular interaction in visual cortex
 J. Neurosci
, 1982
"... The development of stimulus selectivity in the primary sensory cortex of higher vertebrates is considered in a general mathematical framework. A synaptic evolution scheme of a new kind is proposed in which incoming patterns rather than converging afferents compete. The change in the efficacy of a gi ..."
Abstract

Cited by 432 (20 self)
 Add to MetaCart
given synapse depends not only on instantaneous pre and postsynaptic activities but also on a slowly varying timeaveraged value of the postsynaptic activity. Assuming an appropriate nonlinear form for this dependence, development of selectivity is obtained under quite general conditions on the sensory
ZEROCROSS INSTANTANEOUS STATE SETTING FOR CONTROL OF A BIFURCATING HBRIDGE INVERTER
, 2005
"... This paper studies stabilization of lowperiod unstable periodic orbits (UPOs) in a simplified model of a current mode Hbridge inverter. The switching of the inverter is controlled by pulsewidth modulation signal depending on the sampled inductor current. The inverter can exhibit rich nonlinear ph ..."
Abstract
 Add to MetaCart
phenomena including period doubling bifurcation and chaos. Our control method is realized by instantaneous opening of inductor at a zerocrossing moment of an objective UPO and can stabilize the UPO instantaneously as far as the UPO crosses zero in principle. Typical system operations can be confirmed
RESEARCH ARTICLE A RealTime Atrial Fibrillation Detection Algorithm Based on the Instantaneous State of Heart Rate
"... Atrial fibrillation (AF), the most frequent cause of cardioembolic stroke, is increasing in prevalence as the population ages, and presents with a broad spectrum of symptoms and severity. The early identification of AF is an essential part for preventing the possibility of blood clotting and strok ..."
Abstract
 Add to MetaCart
Atrial fibrillation (AF), the most frequent cause of cardioembolic stroke, is increasing in prevalence as the population ages, and presents with a broad spectrum of symptoms and severity. The early identification of AF is an essential part for preventing the possibility of blood clotting and stroke. In this work, a realtime algorithm is proposed for accurately screening AF episodes in electrocardiograms. This method adopts heart rate sequence, and it involves the application of symbolic dynamics and Shannon entropy. Using novel recursive algorithms, a lowcomputational complexity can be obtained. Four publiclyaccessible sets of clinical data (LongTerm AF, MITBIH AF, MITBIH Arrhythmia, and MITBIH Normal Sinus Rhythm Databases) were used for assessment. The first database was selected as a training set; the receiver operating characteristic (ROC) curve was performed, and the best performance was achieved at the threshold of 0.639: the sensitivity (Se), specificity (Sp), positive predictive value (PPV) and overall accuracy (ACC) were 96.14%, 95.73%, 97.03% and 95.97%, respectively. The other three databases were used for independent testing. Using the obtained decisionmaking threshold (i.e., 0.639), for the second set, the obtained parameters were 97.37%, 98.44%, 97.89 % and 97.99%, respectively; for the third database, these parameters were 97.83%, 87.41%, 47.67 % and 88.51%, respectively; the Sp was 99.68 % for the fourth set. The latest methods were also employed for comparison. Collectively, results presented in this study indicate that the combination of symbolic dynamics and Shannon entropy yields a potent AF detector, and suggest this method could be of practical use in both clinical and outofclinical settings.
Instantaneous collapse
, 1998
"... Experimentally observed violations of Bell inequalities rule out local realistic theories. Consequently, the quantum state vector becomes a strong candidate for providing an objective picture of reality. However, such an ontological view of quantum theory faces difficulties when spacelike measuremen ..."
Abstract
 Add to MetaCart
Experimentally observed violations of Bell inequalities rule out local realistic theories. Consequently, the quantum state vector becomes a strong candidate for providing an objective picture of reality. However, such an ontological view of quantum theory faces difficulties when spacelike
Instants and Instantaneous Velocity
, 2011
"... As Frank Arntzenius has shown, instantaneous velocity continues to pose philosophical puzzles. Here I recap the flaws involved in all three standard theories of velocitythe ’atat ’ theory plus the calculus, impetus or dispositional theories and ‘noinstants ’ theories. Next, I argue that, althoug ..."
Abstract
 Add to MetaCart
, that avoids the problems for the versions considered by Arntzenius. In addition, this theory points the way to a more philosophically perspicuous account of the internal structure of time. 1 The Problem of Instantaneous States The concept of the instantaneous state of a physical system has been a source
Treebased batch mode reinforcement learning
 JOURNAL OF MACHINE LEARNING RESEARCH
, 2005
"... Reinforcement learning aims to determine an optimal control policy from interaction with a system or from observations gathered from a system. In batch mode, it can be achieved by approximating the socalled Qfunction based on a set of fourtuples (xt,ut,rt,xt+1) where xt denotes the system state a ..."
Abstract

Cited by 224 (42 self)
 Add to MetaCart
at time t, ut the control action taken, rt the instantaneous reward obtained and xt+1 the successor state of the system, and by determining the control policy from this Qfunction. The Qfunction approximation may be obtained from the limit of a sequence of (batch mode) supervised learning problems
Powernap: Eliminating server idle power
 In International Conference on Architectural Support for Programming Languages and Operating Systems (ASPLOS
, 2009
"... Data center power consumption is growing to unprecedented levels: the EPA estimates U.S. data centers will consume 100 billion kilowatt hours annually by 2011. Much of this energy is wasted in idle systems: in typical deployments, server utilization is below 30%, but idle servers still consume 60 ..."
Abstract

Cited by 219 (4 self)
 Add to MetaCart
nearzeropower idle state in response to instantaneous load. Rather than requiring finegrained powerperformance states and complex loadproportional operation from each system component, PowerNap instead calls for minimizing idle power and transition time, which are simpler optimization goals
Producing Collisions for Panama, Instantaneously
"... Abstract. We present a practical attack on the Panama hash function that generates a collision in 2 6 evaluations of the state updating function. Our attack improves that of Rijmen and coworkers that had a complexity 2 82, too high to produce a collision in practice. This improvement comes mainly fr ..."
Abstract

Cited by 5 (2 self)
 Add to MetaCart
Abstract. We present a practical attack on the Panama hash function that generates a collision in 2 6 evaluations of the state updating function. Our attack improves that of Rijmen and coworkers that had a complexity 2 82, too high to produce a collision in practice. This improvement comes mainly
Results 1  10
of
1,869