Density Problem and Approximation Error in Learning Theory by Ding-Xuan Zhou

“…We study the density problem and approximation error of reproducing kernel Hilbert spaces for the purpose of learning theory. …”
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An efficient algorithm for the density Turán problem of some unicyclic graphs by Halina Bielak, Kamil Powroźnik

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Solving the Zeh Problem About the Density Operator with Higher-Order Statistics by Alain Deville, Yannick Deville

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Density Classification with Non-Unitary Quantum Cellular Automata by Elisabeth Wagner, Federico Dell’Anna, Ramil Nigmatullin, Gavin K. Brennen

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The density Turán problem for some 3-uniform unihypercyclic linear hypergraphs. An efficient testing algorithm by Halina Bielak, Kamil Powroźnik

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Supervised Density-Based Metric Learning Based on Bhattacharya Distance for Imbalanced Data Classification Problems by Atena Jalali Mojahed, Mohammad Hossein Moattar, Hamidreza Ghaffari

“…Therefore, the density of the classes is considered the main basis of learning the new distance metric. …”
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Simulation of urban development in the City of Rome: Framework, methodology, and problem solving by Simone Di Zio, Armando Montanari, Barbara Staniscia

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Machine learning approach to reconstruct density matrices from quantum marginals by Daniel Uzcategui-Contreras, Antonio Guerra, Sebastian Niklitschek, Aldo Delgado

“…In this work, we propose a machine learning (ML)-based approach to address a specific aspect of the Quantum Marginal Problem: reconstructing a global density matrix compatible with a given set of quantum marginals. …”
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THE PROBLEM OF OSTEOPOROSIS IN PATIENTS WITH RHEUMATOID ARTHRITIS by Irina Mikhailovna Marusenko, O Yu Barysheva, N N Vezikova

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SYSTEMIC OSTEOPOROSIS AND PSORIATIC ARTHRITIS: CURRENT UNDERSTANDING OF THE PROBLEM by O. V. Dobrovolskaya, N. V. Toroptsova, E. Yu. Loginova, T. V. Korotaeva

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Density Distribution of Strongly Quantum Degenerate Fermi Systems Simulated by Fictitious Identical Particle Thermodynamics by Bo Yang, Hongsheng Yu, Shujuan Liu, Fengzheng Zhu

“…The exchange antisymmetry of identical fermions leads to an exponential computational bottleneck in ab initio simulations, known as the fermion sign problem. The thermodynamic approach of fictitious identical particles (Y. …”
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Familial Hypercholesterolemia in Children. The Current State of the Problem by Dinara I. Sadykova, Karina R. Salakhova, Liliya F. Galimova, Eugeniya S. Slastnikova, Chulpan D. Khaliullina

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Problem of diagnostics of deterioration in bone strength in children by A. L. Zyatitskaya

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Familial hypercholesterolemia: current status of the problem, treatment, and prevention by S. A. Bliznyuk, M. G. Bubnova, M. V. Ezhov

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Electronic structure of mesoionic compounds. The classification problem by Mariia Kyrpa, Sergiy Kovalenko, Volodymyr Ivanov

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A big data approach to modelling urban population density functions: from monocentricity to polycentricity by Cehong Luo, Yujie Hu, Fahui Wang

Subjects: “…Urban population density function…”
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On the Areal Random Packing by Masaharu Tanemura

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Free Boundary Value Problem for the One-Dimensional Compressible Navier-Stokes Equations with Density-Dependent Viscosity and Discontinuous Initial Data by Ruxu Lian, Guojing Zhang

“…We study the free boundary value problem for one-dimensional isentropic compressible Navier-Stokes equations with density-dependent viscosity coefficient and discontinuous initial data in this paper. …”
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A new approach to the problem of assessing the radon hazard of building sites by N. K. Ryzhakova, K. O. Stavitskaya, A. A. Udalov

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Linear random boundary value problems containing weakly correlated forcing functions by Ning-Mao Xia

Subjects: “…random boundary value problems…”
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