Symmetric RBF classifier for nonlinear detection in multiple-antenna aided systems

In this paper, we propose a powerful symmetric radial basis function (RBF) classifier for nonlinear detection in the so-called “overloaded” multiple-antenna-aided communication systems. By exploiting the inherent symmetry property of the optimal Bayesian detector, the proposed symmetric RBF classifier is capable of approaching the optimal classification performance using noisy training data. The classifier construction process is robust to the choice of the RBF width and is computationally efficient. The proposed solution is capable of providing a signal-to-noise ratio (SNR) gain in excess of 8 dB against the powerful linear minimum bit error rate (BER) benchmark, when supporting four users with the aid of two receive antennas or seven users with four receive antenna elements. Index Terms—Classification, multiple-antenna system, orthogonal forward selection, radial basis function (RBF), symmetry

Reduced-complexity transmit-beamforming codebook search algorithm

A two-stage reduced-complexity index search algorithm is proposed for finding the best vector in the codebook of quantised equal gain transmission based multiple-input multiple-output arrangements. When the number of transmit antennas is more than three, the normalised complexity is halved while maintaining the same symbol error rate as the benchmark

Comment on 'Quantum Backreaction on "Classical" Variables'

It is argued that the bracket of Anderson's canonical theory should have been antisymmetric otherwise serious controversies arise like violation of both hermiticity and the Leibniz rule of differentiation.Comment: 3 pages, LaTe

Concepts in Animal Parasitology, Chapter 64: Phthiraptera (Order): Lice

Chapter 64 in Concepts in Animal Parasitology on lice, order Phthiraptera, by Lajos Rózsa and Haylee J. Weaver. 2024. S. L. Gardner and S. A. Gardner, editors. Zea Books, Lincoln, Nebraska, United States. doi: 10.32873/unl.dc.ciap06

Does market structure influence price transmission in the agro-food sector?

There exists a large literature on price transmission in agro-food sectors. However, a great majority of empirical studies focus on the existence of asymmetry and, by and large, do not investigate the reason for its presence or absence. This is in sharp contrast to the theoretical literature that provides a number of explanations of why we should expect (a)symmetry. In response, this paper investigates the reasons for asymmetric price transmission in the agro-food chain, using meta-analysis of exist- ing studies. Our focus is on the organizational and institutional characteristics of the agro-food supply chain. Our findings suggest that asymmetric price transmis- sion in farm – retail relationships is more likely to occur in sectors/countries with more fragmented farm structure, higher governmental support and more restrictive regulations on price controls in the retail sector. On the other hand, more restric- tive regulations on entry barriers in the retail sector and the relative importance of the sector tend to promote symmetric farm – retail price transmission. The latter is also more likely in the presence of a strong processing indust

Does farm and processing industry structure matter for price transmission? Some Evidence From Transition Countries: A Comparison of Dairy Sectors in Hungary and Poland = Befolyásolja-e a mezőgazdasági és feldolgozóipari üzemstruktúra az ártranszmissziót? A magyar és lengyel tejtermelő ágazatok összehasonlítása

Rapid and thorough changes have recently taken place in dairy supply chain in the whole Central and Eastern Europe. Growing concerns have been expressed that these changes may negatively affect farmers' relative position towards downstream industry, due to market power exercised by the latter. In response to this, the present paper aims to investigate the price transmission mechanism in two countries from the region, namely Poland and Hungary and contrast the results with dairy market organisations specific for these countries. Using cointegrated vector autoregression and controlling for potential structural breaks, it is shown that Polish milk prices, as opposed to Hungarian ones, are characterised by short- and long-term asymmetries. We discuss a number of potential explanations supporting the empirical results. We consider, among others, differences between the dairy chain structures and the role of FDI

Coupled Ito equations of continuous quantum state measurement, and estimation

We discuss a non-linear stochastic master equation that governs the time-evolution of the estimated quantum state. Its differential evolution corresponds to the infinitesimal updates that depend on the time-continuous measurement of the true quantum state. The new stochastic master equation couples to the two standard stochastic differential equations of time-continuous quantum measurement. For the first time, we can prove that the calculated estimate almost always converges to the true state, also at low-efficiency measurements. We show that our single-state theory can be adapted to weak continuous ensemble measurements as well.Comment: 5 pages, RevTeX4. In version v2 some minor revisions and clarifications have been incorporated. Moreover, a new reference has been included. Accepted for publication in Journal of Physics A: Mathematical and Genera