Potential coefficient recovery from the CSR set of simulated satellite gradiometry observations

1991 ◽  
Vol 18 (10) ◽  
pp. 1897-1900
Author(s):  
Radboud Koop ◽  
David Stelpstra
Keyword(s):  
Potential Coefficient ◽  
Satellite Gradiometry ◽  
Coefficient Recovery

Experiments On the Satellite Gradiometry

2012 ◽  
Vol 870 (13) ◽  
pp. 77-79
Author(s):  
Yu.M. Neiman ◽  
◽  
L.S. Sugaipova ◽  
V.V. Popadyev ◽  
◽  
...  
Keyword(s):  
Satellite Gradiometry

scholarly journals Improved Coefficient Recovery and Its Application for Rewritable Data Embedding

2021 ◽  
Vol 7 (11) ◽  
pp. 244
Author(s):  
Alan Sii ◽  
Simying Ong ◽  
KokSheik Wong
Keyword(s):  
Image Coding ◽  
Rate Distortion ◽  
Divide And Conquer ◽  
Storage Device ◽  
Data Embedding ◽  
Discrete Cosine Transformation ◽  
Recovery Method ◽  
Embedding Method ◽  
Coefficient Recovery ◽  
Recovery Methods

JPEG is the most commonly utilized image coding standard for storage and transmission purposes. It achieves a good rate–distortion trade-off, and it has been adopted by many, if not all, handheld devices. However, often information loss occurs due to transmission error or damage to the storage device. To address this problem, various coefficient recovery methods have been proposed in the past, including a divide-and-conquer approach to speed up the recovery process. However, the segmentation technique considered in the existing method operates with the assumption of a bi-modal distribution for the pixel values, but most images do not satisfy this condition. Therefore, in this work, an adaptive method was employed to perform more accurate segmentation, so that the real potential of the previous coefficient recovery methods can be unleashed. In addition, an improved rewritable adaptive data embedding method is also proposed that exploits the recoverability of coefficients. Discrete cosine transformation (DCT) patches and blocks for data hiding are judiciously selected based on the predetermined precision to control the embedding capacity and image distortion. Our results suggest that the adaptive coefficient recovery method is able to improve on the conventional method up to 27% in terms of CPU time, and it also achieved better image quality with most considered images. Furthermore, the proposed rewritable data embedding method is able to embed 20,146 bits into an image of dimensions 512×512.

scholarly journals Electro-Osmotic Behavior of Polymeric Cation-Exchange Membranes in Ethanol-Water Solutions

Entropy ◽  
2020 ◽  
Vol 22 (6) ◽  
pp. 692
Author(s):  
V. María Barragán ◽  
Juan P. G. Villaluenga ◽  
Víctor Morales-Villarejo ◽  
M. Amparo Izquierdo-Gil
Keyword(s):  
Cation Exchange ◽  
Streaming Potential ◽  
Membrane System ◽  
Electrolyte Solutions ◽  
Joule Effect ◽  
Potential Coefficient ◽  
Water Solutions ◽  
Onsager Reciprocity ◽  
Ethanol Content ◽  
Reciprocity Relations

The aim of this work is to apply linear non-equilibrium thermodynamics to study the electrokinetic properties of three cation-exchange membranes of different structures in ethanol-water electrolyte solutions. To this end, liquid uptake and electro-osmotic permeability were estimated with potassium chloride ethanol-water solutions with different ethanol proportions as solvent. Current–voltage curves were also measured for each membrane system to estimate the energy dissipation due to the Joule effect. Considering the Onsager reciprocity relations, the streaming potential coefficient was discussed in terms of ethanol content of the solutions and the membrane structure. The results showed that more porous heterogeneous membrane presented lower values of liquid uptake and streaming potential coefficient with increasing ethanol content. Denser homogeneous membrane showed higher values for both, solvent uptake and streaming coefficient for intermediate content of ethanol.

scholarly journals Towards constraining parity-violations in gravity with satellite gradiometry

2019 ◽  
Vol 789 ◽  
pp. 378-386
Author(s):  
Peng Xu ◽  
Zhi Wang ◽  
Li-E Qiang
Keyword(s):  
Satellite Gradiometry

DC coefficient recovery for JPEG images in ubiquitous communication systems

2019 ◽  
Vol 96 ◽  
pp. 23-31 ◽  
Author(s):  
Han Qiu ◽  
Gerard Memmi ◽  
Xuan Chen ◽  
Jian Xiong
Keyword(s):  
Communication Systems ◽  
Jpeg Images ◽  
Dc Coefficient ◽  
Coefficient Recovery

scholarly journals Saturation Dependence of the Streaming Potential Coefficient

2020 ◽  
pp. 73-100
Author(s):  
Laurence Jouniaux ◽  
Vincent Allègre ◽  
Renaud Toussaint ◽  
Fabio Zyserman
Keyword(s):  
Streaming Potential ◽  
Potential Coefficient

Gravity field determination from satellite gradiometry

1985 ◽  
Vol 59 (3) ◽  
pp. 233-246 ◽  
Author(s):  
R. Rummel ◽  
O. L. Colombo
Keyword(s):  
Gravity Field ◽  
Satellite Gradiometry ◽  
Gravity Field Determination
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