检索结果-南通市图书馆

Computer Modeling in Engineering & Sciences 2021年第6期127卷 901-922页

作者： Safia Akram alia Razia MCS National University of Sciences and TechnologyIslamabadPakistan

This article brings into focus the hybrid effects of thermal and concentration convection on peristaltic pumping of fourth grade nanofluids in an inclined tapered ***,the brief mathematical modelling of the fourth grade nanofluids is provided along with thermal and concentration *** Lubrication method is used to simplify the partial differential equations which are tremendously ***,analytical technique is applied to solve the differential equations that are strongly nonlinear in nature,and exact solutions of temperature,volume fraction of nanoparticles,and concentration are *** and graphical findings manifest the influence of various physical flow-quantity *** is observed that the nanoparticle fraction decreases because of the increasing values of Brownian motion parameter and Dufour parameter,whereas the behaviour of nanoparticle fraction is quite opposite for thermophoresis *** is also noted that the temperature profile decreases with increasing Brownian motion parameter values and rises with Dufour parameter ***,the concentration profile ascends with increasing thermophoresis parameter and Soret parameter values.

关键词： Nanofluids thermal and concentration convection peristaltic flow inclined tapered channel fourth grade fluid

Could non-invasive brain-stimulation prevent neuronal degeneration upon ion channel re-distribution and ion accumulation after demyelination?

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2020年第11期15卷 1977-1980页

作者： Friederike Pfeiffer alia Benali Werner Reichardt Centre for Integrative Neuroscience(CIN) University of TubingenTubingenGermany Section for Computational Sensomotorics Department of Cognitive NeurologyHertie-Institute for Clinical Brain Research and Centre for Integrative NeuroscienceUniversity of TubingenTubingenGermany

Fast and efficient transmission of electrical signals in the nervous system is mediated through myelinated nerve *** neuronal diseases such as multiple sclerosis,the conduction properties of axons are disturbed by the removal of the myelin sheath,leaving nerve cells at a higher risk of *** some cases,the protective myelin sheath of axons can be rebuilt by remyelination through oligodendroglial *** any case,however,changes in the ion channel organization occur and may help to restore impulse conduction after *** the other hand,changes in ion channel distribution may increase the energy demand of axons,thereby increasing the probability of axonal *** attempts have been made or discussed in recent years to increase remyelination of affected axons in demyelinating diseases such as multiple *** approaches range from pharmacological treatments that reduce inflammatory processes or block ion channels to the modulation of neuronal activity through electrical cortical ***,these treatments either affect the entire organism(pharmacological)or exert a very local effect(electrodes).Current results show that neuronal activity is a strong regulator of oligodendroglial *** bridge the gap between global and very local treatments,non-invasive transcranial magnetic stimulation could be *** magnetic stimulation is externally applied to brain areas and experiments with repetitive transcranial magnetic stimulation show that the neuronal activity can be modulated depending on the stimulation parameters in both humans and *** this review,we discuss the possibilities of influencing ion channel distribution and increasing neuronal activity by transcranial magnetic stimulation as well as the effect of this modulation on oligodendroglial cells and their capacity to remyelinate previously demyelinated *** the physiological mechanisms underlying the effects of transcrani

关键词： ion channel multiple sclerosis neuronal activity oligodendrocyte (re-)myelination repetitive transcranial magnetic stimulation transcranial magnetic stimulation

A novel facial emotion recognition scheme based on graph mining

在线全文

学校读者我要写书评

暂无评论

Defence Technology（防务技术） 2020年第5期16卷 1062-1072页

作者： alia K.Hassan Suhaila N.Mohammed Department of Computer Science University of TechnologyBaghdadIraq Department of Computer Science College of ScienceUniversity of BaghdadBaghdadIraq

Recent years have seen an explosion in graph data from a variety of scientific,social and technological *** these fields,emotion recognition is an interesting research area because it finds many applications in real life such as in effective social robotics to increase the interactivity of the robot with human,driver safety during driving,pain monitoring during surgery etc.A novel facial emotion recognition based on graph mining has been proposed in this paper to make a paradigm shift in the way of representing the face region,where the face region is represented as a graph of nodes and edges and the gSpan frequent sub-graphs mining algorithm is used to find the frequent sub-structures in the graph database of each *** reduce the number of generated sub-graphs,overlap ratio metric is utilized for this *** encoding the final selected sub-graphs,binary classification is then applied to classify the emotion of the queried input facial image using six levels of *** cat swarm intelligence is applied within each level of classification to select proper sub-graphs that give the highest accuracy in that *** experiments have been conducted using Surrey Audio-Visual Expressed Emotion(SAVEE)database and the final system accuracy was 90.00%.The results show significant accuracy improvements(about 2%)by the proposed system in comparison to current published works in SAVEE database.

关键词： Emotion recognition Facial landmarks Graph mining gSpan algorithm Binary cat swarm optimization(BCSO) Neural network

Evaluation of suprachiasmatic nucleus in Alzheimer’s disease with non-invasive magnetic resonance methods

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2022年第8期17卷 1753-1754页

作者： Rico Singer A.alia Leiden Institute of Chemistry Leiden UniversityLeidenThe Netherlands Institute of Medical Physics and Biophysics University of LeipzigLeipzigGermany

The suprachiasmatic nucleus and Alzheimer’s disease(AD):AD is the most frequently diagnosed form of dementia,with the total number of AD patients worldwide expected to triple by 2050 compared to 2015(Prince et al.,2015).Despite years of research,much of the AD pathology remains unclear with no treatment or cure *** its two hallmarks,amyloid-β(Aβ)plagues and hyperphosphorylated tau tangles,a distortion of circadian rhythms is commonly ***,poor sleep quality or trouble falling asleep are common AD symptoms,sometimes developing 10-15 years before cognitive symptoms associated with AD(Ju et al.,2014).

关键词： al. Alzheimer supra

Breast Cancer Diagnosis Using Artificial Intelligence Approaches: A Systematic Literature Review

在线全文

学校读者我要写书评

暂无评论

Intelligent Automation & Soft Computing 2023年第7期37卷 939-970页

作者： alia Alshehri Duaa AlSaeed College of Computer and Information Sciences King Saud UniversityRiyadh11451Saudi Arabia

One of the most prevalent cancers in women is breast *** and accurate detection can decrease the mortality rate associated with breast *** and health organizations emphasize the significance of early breast cancer screening since it is associated to a greater variety of available treatments and a higher chance of *** have the best chance of obtaining effective treatment when they are diagnosed *** detection and diagnosis of breast cancer have involved using various image types and imaging ***“infrared thermal”imaging is one of the imaging modalities.,a screening instrument used to measure the temperature distribution of breast tissue,and even though it has not been used as extensively as mammography it demonstrated encouraging outcomes when utilized for early *** also has several advantages,as it is safe,painless,non-invasive,and *** literature showed that the use of thermal images with deep neural networks improved the accuracy of early diagnosis of breast ***,in this paper,we aim to provide a systematic review of research efforts and state-of-the-art studies in the domain of breast cancer detection using AI *** review highlighted different issues,such as using different imaging modalities and deep attention mechanisms with deep learning(DL),which proved to enhance detection accuracy.

关键词： Breast cancer thermography deep learning attention mechanisms machine learning detection diagnosis artificial intelligence

Amyloid β and free heme：bloody new insights into the pathogenesis of Alzheimer＇s disease

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2018年第7期13卷 1170-1174页

作者： Jorg Flemmig Marcel Zámocky A alia Institute for Medical Physics and Biophysics Medical Faculty Leipzig University Leipzig Germany Institute of Molecular Biology Slovak Academy of Sciences Bratislava Slovakia Institute of Chemical Environmental and Biological Engineering Faculty of Technical Chemistry Vienna University of Technology Vienna Austria Leiden Institute of Chemistry Faculty of Science Leiden University Leiden The Netherlands

The cerebral formation of Amyloid β（Aβ） is a critical pathological feature of Alzheimer＇s disease（AD）.An accumulation of this peptide as senile plaques（SP） was already reported by Alois Alzheimer,the discoverer of the *** the exact contribution of Aβ to AD development remains ***,while extensive cerebral Aβ formation leads to fibril formation in many species,AD-like symptoms apparently depend on the highly conserved N-terminal residues R5,Y10 and *** amino acids were also shown to lead to the formation of Aβ-heme complexes,which exhibit peroxidase activity in the presence of H_2O_*** together these observations we propose that the formation and enzymatic activity of the named complexes may represent an essential aspect of AD ***,Aβ is also known to lead to cerebral micro-vessel destruction（CAA） as well as to hemolytic *** we suggest that the Aβ-derived cerebral accumulation of blood-derived free heme represents a likely precondition for the subsequent formation of Aβ-heme complexes.

关键词： Alzheimer's disease amyloid β sequence amyloid β-heme complexes peroxidase activity dityrosine formation cerebral amyloid angiopathy hemolysis

IEEE802.11 Access Point’s Service Set Identifier(SSID)for Localization and Tracking

在线全文

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2022年第6期71卷 5459-5476页

作者： Mohammad Z.Masoud Yousef Jaradat Mohammad alia Electrical Engineering Department Al-Zaytoonah University of JordanAmman11733Jordan Computer Science Department Al-Zaytoonah University of JordanAmman11733Jordan

IEEE802.11,known as WiFi has proliferated in the last *** can be found in smartphones,laptops,smart TVs and surveillance *** popularity has revealed many issues in health,data privacy and *** this work,a WiFi measurement study has been conducted in Amman,the capital city of *** Android App has been written to harvest WiFi information of the transmitted frames of any surrounding Access points(APs).More than 240,000 APs information has been harvested in this *** harvested data have been analyzed to find statistics ofWiFi devices in this ***,three power distribution models have been derived from the data for three different areas,closed,open and hybrid *** addition,the collected data revealed that the SSID can be leveraged as a landmark for the access points(APs).To this end,SSIDtrack algorithm is proposed to track shoppers/walkers in closed areas,such as malls to find their walking route utilizing only the SSID information collected from the surrounding *** algorithm has been tested in two different malls that consist of four different *** accuracy recorded for the algorithm acceded 95%.

关键词： WiFi IEEE802.11 MiFi power model SSID BSSID SSIDtrack

Estimating Age in Short Utterances Based on Multi-Class Classification Approach

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2021年第8期68卷 1713-1729页

作者： Ameer A.Badr alia K.Abdul-Hassan College of Managerial and Financial Sciences Imam Ja’afar Al-Sadiq UniversitySalahaddinIraq Department of Computer Science University of TechnologyBaghdadIraq

Age estimation in short speech utterances finds many applications in daily life like human-robot interaction,custom call routing,targeted marketing,user-profiling,*** the comprehensive studies carried out to extract descriptive features,the estimation errors(***)are still *** this study,an automatic system is proposed to estimate age in short speech utterances without depending on the text as well as the ***,four groups of features are extracted from each utterance frame using hybrid techniques and *** that,10 statistical functionals are measured for each extracted feature ***,the extracted feature dimensions are normalized and reduced using the Quantile method and the Linear Discriminant Analysis(LDA)method,***,the speaker’s age is estimated based on a multi-class classification approach by using the Extreme Gradient Boosting(XGBoost)*** have been carried out on the TIMIT dataset to measure the performance of the proposed *** Mean Absolute Error(MAE)of the suggested system is 4.68 years,and 4.98 years,the Root Mean Square Error(RMSE)is 8.05 and 6.97,respectively,for female and male *** results show a clear relative improvement in terms of MAE up to 28%and 10%for female and male speakers,respectively,in comparison to related works that utilized the TIMIT dataset.

关键词： Speaker age estimation XGBoost statistical functionals Quantile normalization LDA TIMIT dataset

STUDIES ON ULTRASONIC ABSORPTION AND VISCO-RELAXATION OF POLY (ETHYLENE GLYCOL) AQUEOUS SOLUTIONS

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 1989年第3期7卷 270-279页

作者： SUBHI KEMAL HASSUN alia ABDULMUHSIN SHIHAB FATIMA ABDULAMIR JASSIM Physics Department-College of Education-University of Baghdad Iraq.Physics Department-College of Education-University of BaghdadIraq.Physics Department-College of Education-University of BaghdadIraq.

Ultrasonic absorption and velocity measurements were made on aqueous solutions of poly (ethylene glycol)(PEG)of different molecular weights and concentrations, using a pulse sender-receiver ultrasonic generator, Measurements were obtained at a frequency of 2MHz. , and a temperature of 293 K. The results show a linear increase of the Values of velocity, density and viscosity with increase of molecu lar weight and concentration of PEG. On the contrary, the attenuation values decreased with increase of molecular weight and concentration of PEG. A mathematical equation correlating relaxation amplitude and molecular weight of the polymer is suggested. This was applied to calculate the molecular weights of unknown samples of PEG from their measured relaxation amplitude. The results obtained were in good agreement with those obtained from osmometry.

关键词： PEG ETHYLENE GLYCOL STUDIES ON ULTRASONIC ABSORPTION AND VISCO-RELAXATION OF POLY

Vibrations of a laboratory-scale gas-stirred ladle with two eccentric nozzles and multiple sensors

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2019年第10期26卷 1031-1040页

作者： Najib alia Mika Pylvanainen Ville-Valtteri Visuri Volker John Seppo Ollila Weierstrass Institute for Applied Analysis and Stochastics(WIAS) Berlin 10117Germany Intelligent Machines and Systems University of OuluOulu 90014Finland Process Metallurgy Research Unit University of OuluOulu 90014Finland Department of Mathematics and Computer Science Freie Universit(a)it BerlinBerlin 14195Germany SSAB Europe Oy Raahe 92101Finlan

During ladle stirring,a gas is injected into the steel bath to generate a mixing of the liquid *** optimal process control requires a reliable measurement of the stirring intensity,for which the induced ladle wall vibrations have proved to be a potential *** experimental cold water ladle with two eccentric nozzles and eight mono-axial accelerometers was thus investigated to measure the *** effect of the sensors'positions with respect to the gas plugs on the vibration intensity was analyzed,and experimental data on several points of the ladle were collected for future numerical *** is shown that the vibration root-mean-square values depend not only on process parameters,such as gas flow rate,water,and oil heights,but also on the radial and axial positions of the *** vibration intensity is clearly higher,close to the gas plumes,than in the opposite *** one of the nozzles is clogged,the vibration intensity close to the clogged nozzle drops drastically(-36 to-59%),while the vibrations close to the normal operating nozzle are hardly *** on these results,guidelines are provided for an optimized vibration-based stirring.

关键词： Ladle metallurgy Gas stirring Ladle vibration Optimal position Sensor