Results 121 to 130 of about 3,448,461 (253)

554 The covariance of e(k) = [el(k)e2(k)] is i E{e(k)er(k)}=P(k) =-----.

, 2008
The initial conditions for each estimate are and the initial covariance P(0) is a,(0)=22(0)=E{x(O)} =x0 I Equation (22) can be expanded to yield the transition equations for the submatrices of P(k) shown in (21).
Evolves As, The Covariance
core  

Temporal‐Targeted Accelerated 40 Hz tACS Enhances Cognitive Function and Network Integration in Alzheimer's Disease: A Randomized Clinical Trial

Advanced Science, EarlyView.
Bilateral temporal accelerated 40‐Hz tACS improves cognitive function in patients with Alzheimer's disease. Resting‐state fNIRS identifies treatment‐related increases in frontotemporoparietal functional connectivity, which are associated with cognitive improvement. ABSTRACT The temporal lobes are key hubs for memory and cognition.
Rong Guo, Xingxing Li, Chenjun Zou, Chao Zheng, Xiaohong Wu, Xuechao Lu, Jiaying Yan, Junfang Zhang, Xiaoyan Luo, Shiwei Ye, Dongsheng Zhou   +10 more
wiley   +1 more source

Brain Network Dynamics of Local and Global Predictive Processing in Aging

Advanced Science, EarlyView.
Separation of concurrent whole‐brain networks in source‐reconstructed magnetoencephalography (MEG) data suggests that healthy aging reorganizes, rather than uniformly attenuates, neural responses elicited from hierarchical auditory violations. Enhanced early sensory deviance processing alongside reduced higher‐order cognitive responses suggests a large‐
Mathias Houe Andersen, Gemma Fernández‐Rubio, David R. Quiroga‐Martinez, Mattia Rosso, Mathias Klarlund, Kit Melissa Larsen, Hartwig Roman Siebner, Morten L. Kringelbach, Peter Vuust, Leonardo Bonetti   +9 more
wiley   +1 more source

Aberrant individual structure covariance network in patients with mesial temporal lobe epilepsy

Frontiers in Neuroscience
ObjectiveMesial temporal lobe epilepsy (mTLE) is a complex neurological disorder that has been recognized as a widespread global network disorder. The group-level structural covariance network (SCN) could reveal the structural connectivity disruption of ...
Yuda Huang, Ningrui Wang, Ningrui Wang, Wei Li, Tao Feng, Huaqiang Zhang, Xiaotong Fan, Sichang Chen, Yihe Wang, Yongzhi Shan, Penghu Wei, Penghu Wei, Penghu Wei, Guoguang Zhao, Guoguang Zhao, Guoguang Zhao   +15 more
doaj   +1 more source

Ultralow‐Energy Analog Reservoir Computing via Reconfigurable 2‐Transistor Memory

Advanced Science, EarlyView.
This work presents a reconfigurable reservoir‐computing platform based on an oxide InSnZnO two‐transistor cell in which a hold bias selects volatile relaxation for the reservoir or quasi‐non‐volatile multilevel storage for the readout. Multi‐level hold‐bias kernel tune relaxation currents to generate diverse time constants, enriching reservoir states ...
Jeong‐Min Park, Yeong‐In Kim, Jeong Hyun Yoon, Sein Lee, Wooho Ham, Dongyun Lee, Junseo Lee, Dongwook Shin, Kyung Jun Park, Seok Daniel Namgung, Min‐Kyu Song, Jang‐Yeon Kwon   +11 more
wiley   +1 more source

Portfolio risk measurement: the estimation of the covariance of stock returns [PDF]

A covariance matrix of asset returns plays an important role in modern portfolio analysis and risk management. Despite the recent interests in improving the estimation of a return covariance matrix, there remain many areas for further investigation. This
Liu, Lan
core  

Omnidirectional Interaction Networks Modulating Phenotypic Plasticity in the Gut Microbiota Towards Ulcerative Colitis

Advanced Science, EarlyView.
This study employs a spouse‐pair cohort design and an idopNetwork model that integrates evolutionary game theory, predator‐prey dynamics, and developmental modularity theory to reconstruct maximally informative microbial interaction networks. This approach reveals how interspecies interactions drive the phenotypic plasticity of the gut microbiota in ...
Huizhen Li, Jiayi Li, Ang Dong, Xiaoyan Guo, Qiuyue Tu, Zelin Feng, Haojia Lin, Yanru Zhang, Yuxuan Hao, Huiying Gong, Yihan Meng, Yu Wang, Shing‐Tung Yau, Xiaocang Cao, Rongling Wu, Xinjuan Liu   +15 more
wiley   +1 more source

Selective disruption of gray matter volume covariance in orbitofrontal cortex subregions among patients with functional constipation

Scientific Reports
Functional constipation (FCon) is a prevalent common functional gastrointestinal disorders (FGIDs) frequently linked to mental and psychological disorders.
Qian Su, Lianzi Liu, Ting Hua, Jian Gong, Hongliang Tian, Jiongyue Yun, Wangli Cai   +6 more
doaj   +1 more source

Heteroskedasticity-Consistent Estimation of the Variance-Covariance Matrix for the Almost Ideal Demand System [PDF]

In this note I demonstrate the previously overlooked fact that if the AIDS aggregate demand model is constructed as the aggregation of individual consumer demands, then the error structure for any individual equation is necessarily heteroskedastic unless
Melvyn A. Fuss
core  

Soil pH Amelioration Synergizes Carbon Accrual with Yield Gains Under Organic Substitution

Advanced Science, EarlyView.
Soil pH shifts towards neutrality in both acidic and alkaline soils under organic substitution. A global synthesis links pH amelioration to soil organic carbon accrual through enhanced microbial biomass after accounting for added organic carbon and its interaction with pH. This pH amelioration‐shared soil organic carbon accrual accounts for 5.1–8.6% of
Xunzhuo Dong, Yanzhong Yao, Bingbing Han, Yunyao Zhong, Benyi Li, Mengfei Li, Yunchao Dai, Zhaolei Li   +7 more
wiley   +1 more source