Results 101 to 110 of about 2,533,727 (343)

Joint k‐b space diffusion‐weighted image reconstruction and apparent diffusion coefficient fitting for diffusion‐weighted turbo‐spin‐echo imaging

Medical Physics, EarlyView.
Abstract Background Diffusion‐weighted (DW) turbo‐spin‐echo (TSE) imaging offers improved geometric fidelity compared to single‐shot echo‐planar‐imaging (EPI). However, it suffers from low signal‐to‐noise ratio (SNR) and prolonged acquisition times, thereby restricting its applications in diagnosis and MRI‐guided radiotherapy (MRgRT).
Yan Dai, Xun Jia, Jiaen Liu, Yen‐Peng Liao, Jie Deng   +4 more
wiley   +1 more source

The complex genome and adaptive evolution of polyploid Chinese pepper (Zanthoxylum armatum and Zanthoxylum bungeanum)

Plant Biotechnology Journal, Volume 21, Issue 1, Page 78-96, January 2023., 2023
Summary Zanthoxylum armatum and Zanthoxylum bungeanum, known as ‘Chinese pepper’, are distinguished by their extraordinary complex genomes, phenotypic innovation of adaptive evolution and species‐special metabolites. Here, we report reference‐grade genomes of Z. armatum and Z. bungeanum.
Lisong Hu, Zhongping Xu, Rui Fan, Guanying Wang, Fuqiu Wang, Xiaowei Qin, Lin Yan, Xunzhi Ji, Minghui Meng, Soonliang Sim, Wei Chen, Chaoyun Hao, Qinghuang Wang, Huaguo Zhu, Shu Zhu, Pan Xu, Hui Zhao, Keith Lindsey, Henry Daniell, Jonathan F. Wendel, Shuangxia Jin   +20 more
wiley   +1 more source

Interleaver Design for Turbo Codes [PDF]

IEEE J. Selected Areas Communication, 19 (2001), 831-837, 2002
The performance of a Turbo code with short block length depends critically on the interleaver design. There are two major criteria in the design of an interleaver: the distance spectrum of the code and the correlation between the information input data and the soft output of each decoder corresponding to its parity bits.
arxiv  

Coded modulation scheme employing turbo codes

Electronics Letters, 1995
The authors present a turbo coding scheme for bandwidth-efficient modulation that outperforms turbo coding with Gray mapping by employing Ungerboeck codes as component codes. The scheme can be decoded iteratively and achieves very good bit error rates at low signal to noise ratios after a small number of iterations. 8PSK is used as an example, although
Robertson, P., Wörz, T.
openaire   +4 more sources

Survey of Turbo, LDPC, and Polar Decoder ASIC Implementations

IEEE Communications Surveys and Tutorials, 2019
Channel coding may be viewed as the best-informed and most potent component of cellular communication systems, which is used for correcting the transmission errors inflicted by noise, interference, and fading.
Shuai Shao, Peter Hailes, Tsang-Yi Wang, Jwo-Yuh Wu, R. Maunder, B. Al-Hashimi, L. Hanzo   +6 more
semanticscholar   +1 more source

MR‐Cavitation Dynamics Encoded (MR‐CaDE) imaging

Magnetic Resonance in Medicine, EarlyView.
Abstract Purpose To develop methods for dynamic cavitation monitoring of a non‐invasive ultrasound mechanical ablation technology (histotripsy) in the brain and test its feasibility for treatment monitoring in ex‐vivo brain in a human MRI scanner. Methods A Gradient Echo (GRE) pulse sequence was modified with a bipolar gradient to perform MR‐Cavitation
Dinank Gupta, Tarana P. Kaovasia, Steven P. Allen, Jon‐Fredrik Nielsen, Timothy L. Hall, Zhen Xu, Douglas C. Noll   +6 more
wiley   +1 more source

Rewiring of the seed metabolome during Tartary buckwheat domestication

Plant Biotechnology Journal, Volume 21, Issue 1, Page 150-164, January 2023., 2023
Summary Crop domestication usually leads to the narrowing genetic diversity. However, human selection mainly focuses on visible traits, such as yield and plant morphology, with most metabolic changes being invisible to the naked eye. Buckwheat accumulates abundant bioactive substances, making it a dual‐purpose crop with excellent nutritional and ...
Hui Zhao, Yuqi He, Kaixuan Zhang, Shijuan Li, Yong Chen, Ming He, Feng He, Bin Gao, Di Yang, Yu Fan, Xuemei Zhu, Mingli Yan, Nathalie Giglioli‐Guivarc'h, Christophe Hano, Alisdair R. Fernie, Milen I. Georgiev, Dagmar Janovská, Vladimir Meglič, Meiliang Zhou   +18 more
wiley   +1 more source

Saturation transfer MR fingerprinting for magnetization transfer contrast and chemical exchange saturation transfer quantification

Magnetic Resonance in Medicine, EarlyView.
Abstract Purpose The aim of this study was to develop a saturation transfer MR fingerprinting (ST‐MRF) technique using a biophysics model‐driven deep learning approach. Methods A deep learning–based quantitative saturation transfer framework was proposed to estimate water, magnetization transfer contrast, and amide proton transfer (APT) parameters plus
Munendra Singh, Beomgu Kang, Sultan Z. Mahmud, Peter van Zijl, Jinyuan Zhou, Hye‐Young Heo   +5 more
wiley   +1 more source

Efficient Selection of Circular and Random Interleaver for Turbo Codes Multiuser CDMA System with Hadamard Spreading code in AWGN and Rayleigh Fading Channels

Journal of Engineering and Sustainable Development, 2012
Recently, turbo codes have attracted many researchers because of the codes astonishing performance at low signal to noise ratio SNR. The interleaver types and lengths is an important part in the design of a turbo code.
Ghanim Abd AL Kareem
doaj  

Quantitative susceptibility mapping in magnetically inhomogeneous tissues

Magnetic Resonance in Medicine, EarlyView.
Abstract Purpose Conventional quantitative susceptibility mapping (QSM) methods rely on simplified physical models that assume isotropic and homogeneous tissue properties, leading to artifacts and inaccuracies in biological tissues. This study aims to develop and evaluate DEEPOLE, a deep learning–based method that incorporates macroscopically ...
Thomas Jochmann, Fahad Salman, Michael G. Dwyer, Niels Bergsland, Robert Zivadinov, Jens Haueisen, Ferdinand Schweser   +6 more
wiley   +1 more source