检索结果-南通市图书馆

A novel color image encryption algorithm based on a fractional-order discrete chaotic neural network and DNA sequence operations

在线全文

学校读者我要写书评

暂无评论

Frontiers of Information Technology & Electronic Engineering 2020年第6期21卷 866-879页

作者： Li-ping CHEN Hao YIN Li-guo YUAN António M.LOPES j.a.tenreiro machado Ran-chao WU School of Electrical Engineering and Automation Hefei University of TechnologyHefei 230009China College of Mathematics and Informatics South China Agricultural UniversityGuangzhou 510642China UISPA–LAETA/INEGI Faculty of EngineeringUniversity of PortoRua Dr.Roberto FriasPorto 4200-465Portugal Department of Electrical Engineering Polytechnic Institute of PortoR.Dr.António Bernardino de Almeida431Porto 4249-015Portugal School of Mathematical Sciences Anhui UniversityHefei 230601China

A novel color image encryption algorithm based on dynamic deoxyribonucleic acid(DNA)encoding and chaos is presented.A three-neuron fractional-order discrete Hopfield neural network(FODHNN)is employed as a pseudo-random chaotic sequence *** initial value is obtained with the secret key generated by a fiveparameter external key and a hash code of the plain *** external key includes both the FODHNN discrete step size and *** hash is computed with the SHA-2 *** ensures a large secret key space and improves the algorithm sensitivity to the plain ***,a new three-dimensional projection confusion method is proposed to scramble the pixels among red,green,and blue color *** encoding and diffusion are used to diffuse the image ***-random sequences generated by FODHNN are employed to determine the encoding rules for each pixel and to ensure the diversity of the encoding ***,confusion II and XOR are used to ensure the security of the *** results and the security analysis show that the proposed algorithm has better performance than those reported in the literature and can resist typical attacks.

关键词： Fractional-order discrete systems Neural networks Deoxyribonucleic acid(DNA)encryption Color image encryption

Stability analysis of uncertain fractional-order neutral-type delay systems with actuator saturation

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Information Technology & Electronic Engineering 2021年第10期22卷 1402-1412页

作者： Zahra Sadat AGHAYAN Alireza ALFI j.a.tenreiro machado Faculty of Electrical and Robotic Engineering Shahrood University of TechnologyShahrood 36199-95161Iran Institute of Engineering Polytechnic of PortoRua Dr.Ant´onio Bernardino de Almeida 431Porto 4249-015Portugal

This study analyzes the problem of robust stability of fractional-order delay systems of neutral type under actuator saturation.A Lyapunov–Krasovskii(LK)function is constructed and conditions of the asymptotic robust stability of such systems are given,which are formulated by linear matrix inequalities(LMIs),using the Lyapunov direct *** algorithm is introduced to compute the gain of the state feedback controller for extending the domain of *** theoretical results are validated using some numerical examples.

关键词： Fractional-order system Stability Neutral delay Robust Saturation

Apples to oranges:environmentally derived,dynamic regulation of serotonin neuron subpopulations in adulthood?

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第9期20卷 2596-2597页

作者： Christopher j.O’Connell Matthew j.Robson Department of Genetics College of MedicineHarvard UniversityBostonMAUSA james L.Winkle College of Pharmacy Division of Pharmaceutical SciencesUniversity of CincinnatiCincinnatiOHUSA Neuroscience Graduate Program College of MedicineUniversity of CincinnatiCincinnatiOHUSA

Traumatic brain injury(TBI)is a public health problem with an undue economic burden that impacts nearly every age,ethnic,and gender group across the globe(Capizzi et al.,2020).TBIs are often sustained during a dynamic range of exposures to energetic environmental forces and as such outcomes are typically heterogeneous regarding severity and pathology(Capizzi et al.,2020).

关键词： sustained orange dynamic

A biophysical perspective on the unexplored mechanisms driving Parkinson’s disease by amphetamine-like stimulants

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2021年第11期16卷 2213-2214页

作者： Carla Ferreira joana Couceiro Sandra tenreiro Alexandre Quintas Molecular Pathology and Forensic Biochemistry Laboratory Centro de Investigação Interdisciplinar Egas MonizP-2825-084 CaparicaPortugal Laboratório de Ciências Forenses e Psicológicas Egas Moniz Campus Universitário–Quinta da GranjaMonte de CaparicaP-2825-084 CaparicaPortugal Faculty of Medicine of Porto University Al.Prof.Hernâni MonteiroP-4200–319 PortoPortugal iNOVA4Health CEDOCNOVA Medical SchoolNMSUniversidade Nova de Lisboa1169-056 LisboaPortugal

Epidemiological studies have reported an increased risk of Parkinson’s disease(PD)development in amphetamine-type stimulant users during their lifetime(Garwood et al.,2006;Rumpf et al.,2017).Protein inclusions mainly composed of misfolded and aggregatedα-synuclein are the pathological hallmark of PD and other disorders known as *** studies present evidence that amphetamine upregulatesα-synuclein synthesis in substantia *** increment ofα-synuclein levels promotes its aggregation and amyloid fibril formation,increasing reactive oxygen species(ROS),and consequently dopamine oxidation(Wang and Witt,2014),known to be toxic for dopaminergic neurons involved in motor function and limbicmotor *** the years,these damaged cells lose their functionality and may die precociously,depleting the reserve of neural cells necessary for the normal neurological function which contributes to the onset of PD,when a critical number of cells are lost(Garwood et al.,2006).Therefore,the use of amphetamine-type stimulants may be a trigger event in the development of PD and parkinsonism,in conjugation to other risk factors that a given individual may *** the evidence,a previous study suggests that there is not enough data to corroborate the loss of dopamine neurons due to human amphetamine-type stimulant exposure,and consequently its implication in the PD development(Kish et al.,2017).

关键词： driving increment lifetime

Gene therapy for spinal muscular atrophy:perspectives on the possibility of optimizing SMN1 delivery to correct all neurological and systemic perturbations

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第7期20卷 2011-2012页

作者： Sharon j.Brown Rafael j.Yáñez-Muñoz Heidi R.Fuller School of Pharmacy and Bioengineering Keele UniversityKeeleUK Wolfson Center for Inherited Neuromuscular Disease TORCH BuildingRJAH Orthopaedic HospitalOswestryUK *** Center of Gene and Cell TherapyDepartment of Biological SciencesSchool of Life Sciences and the EnvironmentRoyal Holloway University of LondonEghamUK

Spinal muscular atrophy(SMA)is a genetic condition that results in selective lower motor neuron loss with concomitant muscle weakness and *** genetic cause of SMA was understood in 1995 when loss or impairment of the survival motor neuron 1(SMN1)gene was identified as the main contributing factor(Lefebvre et al.,1995).This,in combination with the discovery that humans have a“back-up”gene,SMN2,which can produce low levels(approximately 10%)of the full-length functional SMN protein,has led to the generation of SMA-specific gene *** was traditionally classified according to age of symptom onset and developmental milestones achieved,with life expectancy and severity varying between ***,SMN2 copy number is used as a proxy for the prediction of disease severity,with higher SMN2 copy number typically being associated with reduced severity of SMA,although this relationship is not absolute:some individuals with low SMN2 copy number have less severe SMA phenotypes and vice ***,the etiology of SMA is further complicated by other factors,such as non-typical nucleotide variants and SMN2-independent modifiers of disease severity.

关键词： atrophy traditionally absolute

Women in visual neural regeneration research

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第2期20卷 489-490页

作者： Tonia S.Rex David j.Calkins Vanderbilt Eye Institute Vanderbilt University Medical CenterNashvilleTNUSA

The year 2024 marks the 60^(th)anniversary of Title IX and 25 years since the New York Times revealed bias against female faculty members at the Massachusetts Institute of *** take an opportunity here to examine the state of gender bias in a relatively new yet already prominent field,neural regeneration in the visual system,for which there is a well-defined context useful for this *** National Eye Institute(NEI)provided the first round of research funding for its Audacious Goals Initiative(AGI)on visual neural regeneration in 2013 and the last round in ***,we focus on this *** sources included PubMed,the National Science Foundation(NSF),the NEI,the Blue Ridge Institute for Medical Research and data from the major professional organization for eye and vision research,the Association for Research in Vision and Ophthalmology(ARVO).

关键词： neural visual Times

Generation of brain vascular heterogeneity:recent advances from the perspective of angiogenesis

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第7期20卷 2013-2014页

作者： Nathanael j.Lee Ryota L.Matsuoka Department of Neurosciences Lerner Research InstituteCleveland ClinicClevelandOHUSA Department of Molecular Medicine Cleveland Clinic Lerner College of MedicineCase Western Reserve UniversityClevelandOHUSA

Heterogeneous proper t i es of vascular endothelial cells in the brain:The brain displays large energy dynamics and consumption,and this high level of metabolic demands is fulfilled by a continuous supply of glucose and oxygen through its vascular *** vasculature consists of highly divergent blood vessel branches,giving rise to a dense network of capillaries that supply blood to all cells across the *** elaborated vascular network is thought to develop via angiogenesis,a process in which new blood vessels grow from pre-existing *** capillaries exhibit organotypic features distinct from other tissues and are formed primarily by two major endothelial cell(EC)types:those that form the semi-permeable blood-brain barrier(BBB)and those that develop highly permeable pores known as fenestrae(Matsuoka et al.,2022).The structural and functional differences between BBB and fenestrated vascular ECs represent a fundamental feature of brain vasculature and form the foundation for both brain function and homeostasis.

关键词： angiogenesis homeostasis network

Analysis of the bacterial community composition in acidic well water used for drinking in Guinea-Bissau,West Africa

在线全文

学校读者我要写书评

暂无评论

journal of Environmental Sciences 2014年第8期26卷 1605-1614页

作者： Ana machado Adriano A.Bordalo Laboratory of Hydrobiology and Ecology Institute of Biomedical SciencesUniversity of PortoPorto 4050-313Portugal CIIMAR/CIMAR-Interdisciplinary Centre of Marine and Environmental Research University of PortoPorto 4050-123Portugal

Potable water is a resource out of reach for millions worldwide,and the available water may be chemically and microbiologically compromised. This is particularly acute in Africa,where water-networks may be non-existent or restricted to a small fraction of the urban population,as in the case of Guinea-Bissau,West Africa. This study was carried out seasonally in Bolama（11°N）,where unprotected hand-dug wells with acidic water are the sole source of water for the population. We inspected the free-living bacterial community dynamics by automated rRNA intergenic spacer analyses,quantitative polymerase chain reaction and cloning *** results revealed a clear seasonal shift in bacterial assemblage composition and microbial abundance within the same sampling site. Temperature,pH and turbidity,together with the infiltration and percolation of surface water,which takes place in the wet season,seemed to be the driving factors in the shaping and selection of the bacterial community and deterioration of water quality. Analysis of 16 S rDNA sequences revealed several potential pathogenic bacteria and uncultured bacteria associated with water and sediments,corroborating the importance of a culture-independent approach in drinking water monitoring.

关键词： Water quality Microbial community ARISA qPCR Drinking water Africa

Neuroprotection by resveratrol-glucuronide and quercetin-glucuronide via binding to polyphenol-and glycosaminoglycan-binding sites in the laminin receptor

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第3期20卷 819-820页

作者： Rayudu Gopalakrishna jennifer Aguilar Emily Lee William j.Mack Department of Integrative Anatomical Sciences Keck School of MedicineUniversity of Southern CaliforniaLos AngelesCAUSA Department of Neurological Surgery Keck School of MedicineUniversity of Southern CaliforniaLos AngelesCAUSA

The dietary polyphenolic compounds resveratrol and quercetin prevent neurodegenerative diseases in experimental models;however, they reach the brain only in nanomolar concentrations in the glucuronidated and sulfated ... 详细信息

关键词： resveratrol molar dated