地球儀上の2つの離れた点の距離はどうやってわかるだろうか？ 私たちは地球の表面に立っている． 地球の表面の位置を表すのに，緯度(latitude)と経度(longitude)を使う． このたった2つのパラメタで私たちの地球上の位置は示される． 緯度と経度をそれぞれ ...

Abstract: In this letter, tensor ring decomposition (TRD) was proposed to estimate the two-dimensional direction-of-departure (2D-DOD) and two-dimensional direction-of-arrival (2D-DOA) in bistatic ...

On a compact n-dimensional manifold, it is well known that a critical metric of the total scalar curvature, restricted to the space of metrics with unit volume is Einstein. It has been conjectured ...

SEOUL, Republic of Korea, Aug. 6, 2025 /PRNewswire/ -- Quantum distance refers to a measure of quantum mechanical similarity between two quantum states. A quantum distance of one means that the two ...

Quantum distance refers to a measure of quantum mechanical similarity between two quantum states. A quantum distance of one means that the two quantum states are the same, whereas a quantum distance ...