Results 71 to 80 of about 190,474 (279)

Binary quadratic forms of determinant −pq

Journal of Number Theory, 1972
AbstractThe following theorem is proved: If p and q are distinct primes of the form 4n + 1, and (p | q) = 1, then x2 − pqy2 represents −1 if (p | q)4 = (q | p)4 = −1; p if (q | p)4 = −(p | q)4 = 1; q if (p | q)4 = −(q | p)4 = 1. If (p | q)4 = (q | p)4 = 1, there are examples with any of the three being represented.
openaire   +2 more sources

Solid Harmonic Wavelet Bispectrum for Image Analysis

Advanced Science, EarlyView.
The Solid Harmonic Wavelet Bispectrum (SHWB), a rotation‐ and translation‐invariant descriptor that captures higher‐order (phase) correlations in signals, is introduced. Combining wavelet scattering, bispectral analysis, and group theory, SHWB achieves interpretable, data‐efficient representations and demonstrates competitive performance across texture,
Alex Brown, Mathilda Avirett‐Mackenzie, Carolin Villforth, Georgios Exarchakis   +3 more
wiley   +1 more source

Diversity of Pharmaceuticals Enhances Antibiotic Resistance in the Invertebrate Gut via Biofilm‐Mediated Mechanisms

Advanced Science, EarlyView.
Pharmaceutical diversity acts as an independent driver of antibiotic resistance in soil invertebrates. While bulk soil remains unaffected, the collembolan gut microbiome exhibits significant resistance gene enrichment under complex chemical exposure and diurnal warming.
Yi‐Fei Wang, Ya‐Ning Wang, Da Lin, Jia‐Yang Xu, Feng‐Yuan Qi, Hui‐Ling Cui, Hui‐Jie Lu, Min Qiao, Edward Topp, Dong Zhu, Matthias C. Rillig, Yong‐Guan Zhu   +11 more
wiley   +1 more source

IRIS RECOGNITION BASED ON KERNELS OF SUPPORT VECTOR MACHINE [PDF]

ICTACT Journal on Soft Computing, 2015
Ensuring security biometrically is essential in most of the authentication and identification scenario. Recognition based on iris patterns is a thrust area of research cause to provide reliable, simple and rapid identification system.
K. Saminathan, T. Chakravarthy, M. Chithra Devi   +2 more
doaj  

Rapid Proteome‐Wide Discovery of Protein–Protein Interactions With ppIRIS

Advanced Science, EarlyView.
ppIRIS is a lightweight deep learning framework for proteome‐wide protein–protein interaction prediction directly from sequence. By fusing evolutionary and structural embeddings with a regularized Siamese architecture, ppIRIS achieves state‐of‐the‐art accuracy across species, enables minute‐scale screening, and reveals biologically validated bacterial ...
Luiz Felipe Piochi, Di Tang, Johan Malmström, Yasaman Karami, Hamed Khakzad   +4 more
wiley   +1 more source

Random Time‐Space Coding Metasurfaces for Spatial Control of the Temporal Statistics of Electromagnetic Fields

Advanced Science, EarlyView.
A probabilistic framework based on random time‐space coding metasurfaces enables control of the spatial distribution of electromagnetic fields temporal statistics. By tailoring the marginal and joint distributions of random codes, electromagnetic fields with desired mean and variance patterns are realized, enabling simultaneous transmission and jamming.
Jia Cheng Li, Jiang Han Bao, Che Liu, Tie Jun Cui   +3 more
wiley   +1 more source

Study of Free‐Space Optical Quantum Network: Review and Prospectives

Advanced Science, EarlyView.
Free from the constraints of fiber connections, free‐space quantum network enables longer and more flexible quantum network connections. This review summarizes and comparatively analyzes free‐space quantum network experiments based on ground stations, satellites, and mobile platforms.
Hua‐Ying Liu, Zhenda Xie, Shining Zhu
wiley   +1 more source

Computing canonical averages with quantum and classical optimizers: Thermodynamic reweighting for QUBO models of physical systems

Physical Review Research
We present a general method to compute canonical averages for physical models sampled via quantum or classical quadratic unconstrained binary optimization (QUBO).
Francesco Slongo, Cristian Micheletti
doaj   +1 more source

Nebula: Network Enhanced Boltzmann Machine With Universal Local Search Architecture

IEEE Access
We propose Nebula, a computational method for combinatorial optimization and stochastic sampling. The proposed method is designed for a generic local search engine utilized for digital annealing in an optimization system for multidimensional binary ...
Yasuhiro Watanabe, Hirotaka Tamura, Yuki Furue, Fang Yin   +3 more
doaj   +1 more source

Composition of Binary Quadratic Forms over Number Fields

, 2019
In this article, the standard correspondence between the ideal class group of a quadratic number field and the equivalence classes of binary quadratic forms of given discriminant is generalized to any base number field of narrow class number one.
Zemková, Kristýna
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