Hasil untuk "cs.NI"

Nassir Saad Alarifi, Mostafa R. Abukhadra, Li-Yuan Chang

Hongxuan Duan, Xiaochang Lv

Due to the fact that Magnetic Resonance Imaging (MRI) is still a relatively slow imaging modality, its application for dynamic imaging is restricted. The total variation is introduced into the CS-based MRI reconstruction model, and three regularization conditions are adopted to ensure that a high-quality reconstructed image is produced. In this paper, a simple yet fast CS-based optimization model for noisy MRI Enhancement is proposed. The alternative direction multiplier method is chosen to optimize the model, and the k-terms power series is applied in order to derive the LogDet function into the augmented Lagrange form. Following this, an approximation of the feature vector is achieved through the iterative process. The quality of the reconstructed image was much better than that of the CS-based MRI image reconstruction algorithm, as shown by experimental results under different noise conditions. The peak signal-to-noise ratio of the reconstructed image was able to be improved anywhere from 5 to 20 percent.

Matthew Livingston, Yan Tian, Lijun Ni et al.

Kamalika Sen, Arabinda Chakraborty

Juan David Mesa

Reseña del libro:Guerrero, Mauricio (ed.) (2014). Objetos públicos, espacios privados. Usuarios y relaciones sociales en tres centros comerciales de Santiago de Cali. Cali: Universidad Icesi, pp. 158.

A. N. Sirenko, D. K. Belashchenko

Xiaohui Liu, Manfred Speldrich, Paul Koegerler et al.

AbstractThe new two‐dimensional compounds (III) are characterized by single crystal XRD, FT‐IR and UV/VIS spectroscopy, magnetic measurements, and DFT calculations.

R. E. Schmidt, D. Babel

AbstractAls einzige nickelhaltige Phase bei der Festkörperreaktion 2 CsF + NiF2 konnten wir die Verbindung Cs7Ni4F15 identifizieren. Die Einkristallstrukturbestimmung an diesem monoklinen Fluorid (und der analogen Cobaltverbindung Cs7Co4F15) ergab: a = 787,2 (788,3), b = 1089,7 (1096,6), c = 1149,5 (1164,9) pm, β = 92,74 (92,59)°, Raumgruppe P21/c, Z = 2, Rg = 0,045 (0,058) für 2543 (2716) unabhängige Reflexe. Es liegt eine stark aufgerauhte Schichtstruktur vor, in der statt Einzeloktaedern nur flächenverknüpfte M2F9‐Einheiten vorkommen, die über die Hälfte der verbleibenden Ecken miteinander verbunden sind. Die MF‐Abstände variieren von 195,1 bis 212,0 (196,7 bis 217,0) pm und sind im Mittel mit 203,7 (206,5) pm anomal groß. Vergleichsdaten und weitere Einzelheiten werden diskutiert.

Allan G. Mungall, Cecil C. Costain

I. I. Korobov, N. G. Mozgina

Kenji Hiraga, Akira Yasuhara, Kunio Yubuta

María Del Pilar Carmona Suárez

K. Hiraga, A. Yasuhara

K. Nagaraj