Results 111 to 120 of about 1,435,821 (287)

On The Use of Discrete Cosine Transform Polarity Spectrum in Speech Enhancement

, 2020
This paper investigates the use of short-time Discrete Cosine Transform (DCT) for speech enhancement. We denote the absolute values and signs of the DCT spectral coefficients as the Absolute Spectrum (AS) and Polarity Spectrum (PoS), respectively.
Fickenscher, Thomas, Paliwal, Kuldip, Shi, Sisi, Busch, Andrew   +3 more
core   +1 more source

A Disulfide‐Sticker Strategy for Marine Adhesive Coatings: From Deciphering Self‐Assembly Mechanism to Functional Application in Hair Regeneration

Advanced Science, EarlyView.
A disulfide‐sticker strategy, coupled with Ca2+ coordination, drives the hierarchical self‐assembly of a recombinant scallop adhesive protein into fishnet‐like nanostructures, affording a coating with versatile wet adhesion and intrinsic antioxidant activity. This biocompatible coating markedly promotes hair regeneration by activating follicular niches,
Lulu Wang, Juan Yang, Xin Jiang, Zhanghui Zheng, Hongyu Wei, Na Li, Xiangqiang Chu, Weizhi Liu   +7 more
wiley   +1 more source

Image Compression Using the Discrete Cosine Transform

, 1994
The discrete cosine transform (DCT) is a technique for converting a signal into elementary frequency components. It is widely used in image compression. Here we develop some simple functions to compute the DCT and to compress images.
Andrew B. Watson
core  

A Bio‐Functional Mimetic Robot for Versatile Tasks From Cross‐Scale Manipulation to Limb‐Tool Integration

Advanced Science, EarlyView.
A functionally biomimetic design methodology is presented, enabling a single robot to perform eight distinct functions and manipulate objects across a size range exceeding 2300‐fold. The robot exceeds basic human hand functions and demonstrates remote operation, multi‐object manipulation, humanoid‐robot hand interaction, and narrow‐space inspection ...
Xin Tong, Tianle Zhang, Fei Mo, Qian Zhao, Zhongqing Sun, Yongkang Jiang, Yang Yang, Yingtian Li   +7 more
wiley   +1 more source

Automatic melanoma detection using discrete cosine transform features and metadata on dermoscopic images

Journal of King Saud University: Computer and Information Sciences
Machine learning contributes in improving the accuracy of melanoma detection. There are extensive studies in classic and deep learning-based approaches for melanoma detection in the literature.
Shamim Yousefi, Samad Najjar-Ghabel, Ramin Danehchin, Shahab S. Band, Chung-Chian Hsu, Amir Mosavi   +5 more
doaj   +1 more source

Polarization Engineering in Vinylene‐Linked COFs Toward Efficient Neuromorphic Computing

Advanced Science, EarlyView.
A vinyl‐linked covalent organic framework (COF‐DIBPY) was synthesized on a conductive substrate for memristor applications. Redox reactions and bromide migration enable low‐voltage (0.5V) conductance switching with high analog on/off ratio (15.7). The device was further integrated into a speech emotion recognition system for acoustic simulation and ...
Hao Wang, Lei Zhao, Haoyuan Yao, Qiongshan Zhang, Fuzhen Xuan, Bin Zhang   +5 more
wiley   +1 more source

Regulating Droplet Dynamics via Wormlike Micelle Networks: From Splash Suppression to Precise Confined Spreading

Advanced Science, EarlyView.
As displayed in Graphical Abstract image.tif, a molecular‐design strategy precisely tailors high‐speed droplet dynamics through programmed surfactant co‐assembly. The structural transition into an entangled wormlike micelle network completely suppresses stochastic splashing on fibrous substrates.
Shuling Liu, Beibei Xie, Xingyue Lou, Yu Deng, Lei Wang, Jiawei Li, Dongming Qi   +6 more
wiley   +1 more source

Hierarchical Physical‐Cyber Encryption via Metasurface‐Encoded Holographic Keys

Advanced Science, EarlyView.
ABSTRACT Physical‐layer encryption based on metasurfaces has emerged as a promising alternative to conventional algorithmic cryptography by embedding security into physical processes. However, most existing metasurface‐based encryption schemes operate within single‐stage or static frameworks, where correct physical illumination directly reveals the ...
Zhen Liu, Changhong Dai, Wei Zhu, Ruisheng Yang, Bohan Zhang, Lei Zhang, Bobo Du, Shengxiang Wang, Guangwei Hu   +8 more
wiley   +1 more source

Steerable-Discrete-Cosine-Transform (SDCT): Hardware Implementation and Performance Analysis. [PDF]

Sensors (Basel), 2020
Peloso R, Capra M, Sole L, Ruo Roch M, Masera G, Martina M.   +5 more
europepmc   +1 more source

Computation of Hilbert Transform via Discrete Cosine Transform

, 2010
Hilbert transform (HT) is an important tool in constructing analytic signals for various purposes, such as envelope and instantaneous frequency analysis, amplitude modulation, shift invariant wavelet analysis and Hilbert-Huang decompo-sition.
Hannu Olkkonen, Olkkonen, Juuso T., Peitsa Pesola, Juuso T. Olkkonen, Olkkonen, H., Pesola, P.   +5 more
core   +1 more source