The effect of habitats and fitness on species coexistence in systems with cyclic dominance. (arXiv:1911.09268v1 [q-bio.PE])

Cyclic dominance between species may yield spiral waves that are known to provide a mechanism enabling persistent species coexistence. This observation holds true even in presence of spatial heterogeneity in the form of quenched disorder. In this work we study the effects on spatio-temporal patterns and species coexistence of structured spatial heterogeneity in the form…

Controversial stimuli: pitting neural networks against each other as models of human recognition. (arXiv:1911.09288v1 [cs.CV])

Distinct scientific theories can make similar predictions. To adjudicate between theories, we must design experiments for which the theories make distinct predictions. Here we consider the problem of comparing deep neural networks as models of human visual recognition. To efficiently determine which models better explain human responses, we synthesize controversial stimuli: images for which different…

Bounded Temporal Fairness for FIFO Financial Markets. (arXiv:1911.09209v1 [cs.CE])

Financial exchange operators cater to the needs of their users while simultaneously ensuring compliance with the financial regulations. In this work, we focus on the operators’ commitment for fair treatment of all competing participants. We first discuss unbounded temporal fairness and then investigate its implementation and infrastructure requirements for exchanges. We find that these requirements…

Unlimited Dynamic Range Analog-to-Digital Conversion. (arXiv:1911.09371v1 [eess.SP])

Analog-to-digital converters (ADCs) provide the link between continuous-time signals and their discrete-time counterparts, and the Shannon-Nyquist sampling theorem provides the mathematical foundation. Real-world signals have a variable amplitude range, whereas ADCs, by design, have a limited input dynamic range, which results in out-of-range signals getting clipped. In this paper, we propose an unlimited dynamic range…

Multi-Scale RCNN Model for Financial Time-series Classification. (arXiv:1911.09359v1 [cs.LG])

Financial time-series classification (FTC) is extremely valuable for investment management. In past decades, it draws a lot of attention from a wide extent of research areas, especially Artificial Intelligence (AI). Existing researches majorly focused on exploring the effects of the Multi-Scale (MS) property or the Temporal Dependency (TD) within financial time-series. Unfortunately, most previous researches…

Segmenting Medical MRI via Recurrent Decoding Cell. (arXiv:1911.09401v1 [eess.IV])

The encoder-decoder networks are commonly used in medical image segmentation due to their remarkable performance in hierarchical feature fusion. However, the expanding path for feature decoding and spatial recovery does not consider the long-term dependency when fusing feature maps from different layers, and the universal encoder-decoder network does not make full use of the multi-modality…

Some analytically solvable problems of the mean-field games theory. (arXiv:1911.09441v1 [math.AP])

We study the mean field games equations, consisting of the coupled Kolmogorov-Fokker-Planck and Hamilton-Jacobi-Bellman equations. The equations are complemented by initial and terminal conditions. It is shown that with some specific choice of data, this problem can be reduced to solving a quadratically nonlinear system of ODEs. This situation occurs naturally in economic applications. As…

Berk-Nash Equilibrium: A Framework for Modeling Agents with Misspecified Models. (arXiv:1411.1152v4 [q-fin.EC] UPDATED)

We develop an equilibrium framework that relaxes the standard assumption that people have a correctly-specified view of their environment. Each player is characterized by a (possibly misspecified) subjective model, which describes the set of feasible beliefs over payoff-relevant consequences as a function of actions. We introduce the notion of a Berk-Nash equilibrium: Each player follows…

Simple Explicit Formula for Near-Optimal Stochastic Lifestyling. (arXiv:1801.00980v2 [q-fin.PM] UPDATED)

In life-cycle economics the Samuelson paradigm (Samuelson, 1969) states that the optimal investment is in constant proportions out of lifetime wealth composed of current savings and the present value of future income. It is well known that in the presence of credit constraints this paradigm no longer applies. Instead, optimal lifecycle investment gives rise to…

Max-Min Fair Precoder Design for Non-Orthogonal Multiple Access. (arXiv:1911.09402v1 [eess.SP])

In this paper, a downlink multiple input multiple output (MIMO) non-orthogonal multiple access (NOMA) wireless communication system is considered. In NOMA systems, the base station has unicast data for all users, and multiple users share the same resources. Maximizing the minimum cluster rate amongst multiple NOMA clusters through transmit precoding under quality-of-service (QoS) and total…