Results 61 to 70 of about 97,714 (213)

Noise Impact Analysis in Computer-Generated Holography Based on Dual Metrics Evaluation via Peak Signal-to-Noise Ratio and Structural Similarity Index Measure

Applied Sciences
This study investigates the noise impact on reconstructed images in computer-generated holography (CGH) through theoretical analysis and Matlab 2015b simulations.
Yucheng Li, Yang Zhang, Deyu Jia, Song Gao, Muqun Zhang   +4 more
doaj   +1 more source

Simulation-Based Verification and Application Research of Spatial Spectrum Modulation Technology for Optical Imaging Systems

Photonics
Leveraging Fourier optics theory and Abbe’s imaging principle, this study establishes that optical imaging fundamentally involves selective spatial spectrum recombination at the Fourier plane. Three classical experiments quantitatively validate universal
Yucheng Li, Yang Zhang, Houyun Liu, Daokuan Wang, Jiahui Yuan   +4 more
doaj   +1 more source

CO and C_2 Absorption Toward W40 IRS 1a [PDF]

, 1999
The H II region W40 harbors a small group of young, hot stars behind roughly 9 magnitudes of visual extinction. We have detected gaseous carbon monoxide (CO) and diatomic carbon (C_2) in absorption toward the star W40 IRS 1a. The 2-0 R0, R1, and R2 lines
Barry L. Lutz, Crawford I. A., Gredel R., Gredel R., Jiang D. R., Mantz A. W., R. Young Shuping, Richard Crutcher, Theodore P. Snow, Vallee J. P., Vallee J. P., Vallee J. P., Vallee J. P., Warin S.   +13 more
core   +2 more sources

Non-linear evolution equations and hyperelliptic covers of elliptic curves [PDF]

, 2010
We study the general properties of spectral curves associated to doubly-periodic solutions of Korteweg-deVries, sine-Gordon, Non-linear Schr\"odinger and 1D Toda equations, and construct examples of arbitrary ...
Treibich, Armando
core   +4 more sources

The Warm Molecular Gas Around the Cloverleaf Quasar [PDF]

, 2009
We present the first broadband lambda = 1 mm spectrum toward the z=2.56 Cloverleaf Quasar, obtained with Z-Spec, a 1-mm grating spectrograph on the 10.4-meter Caltech Submillimeter Observatory.
Alloin, Ashby, B. J. Naylor, Barvainis, Barvainis, Bradford, Bradford, C. M. Bradford, Casoli, Cernicharo, Cernicharo, Chartas, Chartas, Encrenaz, Fixsen, Frayer, Gao, González-Alfonso, H. Inami, H. Matsuhara, H. T. Nguyen, Hailey-Dunsheath, Harwit, Henkel, Hopkins, J. E. Aguirre, J. Glenn, J. J. Bock, J. Zmuidzinas, Kaufman, Kennicutt, Kneib, Kneib, L. Earle, Larson, Lutz, Neufeld, P. R. Maloney, Papadopoulos, Pérez-González, R. Aikin, Riechers, Riechers, Snell, Stacey, Stutzki, Venturini, Ward, Wilner, Yun   +49 more
core   +2 more sources

Enhanced thermopower in an intergrowth cobalt oxide Li$_{0.48}$Na$_{0.35}$CoO$_{2}$

, 2005
We report the measurements of thermopower, electrical resistivity and thermal conductivity in a complex cobalt oxide Li$_{0.48}$Na$_{0.35}$CoO$_{2}$, whose crystal structure can be viewed as an intergrowth of the O3 phase of Li$_{x}$CoO$_{2}$ and the P2 ...
Chunmu Feng, Guanghan Cao, Jingqin Shen, Mahan G, Shuai Jiang, Xiaoyang Chen, Zhi Ren, Zhu’an Xu   +7 more
core   +1 more source

Physical State of Molecular Gas in High Galactic Latitude Translucent Clouds [PDF]

, 1999
The rotational transitions of carbon monoxide (CO) are the primary means of investigating the density and velocity structure of the molecular interstellar medium.
Adair P. Lane, Antony A. Stark, Ballesteros-Paredes J., Castor J. I., Desert F.-X., Falgarone E., Falgarone E., Flower D. R., Habing H. J., Heithausen A., Heithausen A., Heithausen A., James G. Ingalls, Matthias Rumitz, Park Y.-S., Stark R., Stark R., T. M. Bania   +17 more
core   +3 more sources

A Point Cloud Registration Method Based on Point-to-Triangulation Estimation for Optical Window Free-Form Surfaces Testing by Coordinate Measuring Machine

Photonics
Optical window freeform surfaces have emerged as a critical research focus in advanced optical engineering owing to their extensive surface degrees of freedom.
Chuanchao Wu, Junjie Shi, Taorui Li, Haijiao Huang, Fudong Chu, Siyuan Jiang, Longyue Li, Chiben Zhang   +7 more
doaj   +1 more source

NiCo2O4@Porous Graphene Aerogel with Dual Functions of Adsorption and Catalysis to Promote Catalytic Conversion of Polysulfides

ChemElectroChem
Combining transition metal oxides with polarity and 3D porous carbon materials to leverage their synergistic effects is an effective strategy for addressing the challenges in lithium–sulfur batteries.
Yunfeng Lu, Xuelin Huang, Ruikang Zuo, Peng Zeng, Juan Yang, Manfang Chen, Hongbo Shu, Hong Liu, Xianyou Wang   +8 more
doaj   +1 more source

Active Damping Control for the Modular Multi-Active-Bridge Converter

Energies
The modular multi-active bridge (MMAB) converter—characterized by electrical isolation, modular design, high power density, and high efficiency—can be readily scaled to multiple DC ports through an internal shared high-frequency bus (HFB), establishing ...
Wusong Wen, Yingchao Zhang, Tianwen Zhan, Sheng Long, Hao Deng   +4 more
doaj   +1 more source