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Estimation of optimum design of structural systems via machine learning

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Frontiers of Structural and Civil Engineering 2021年第6期15卷 1441-1452页

作者： Gebrail BEKDAŞ Melda yÜcel Sinan Melih NIGDELI Department of Civil Engineering Istanbul University-CerrahpaşaIstanbul 34320Turkey

Three different structural engineering designs were investigated to determine optimum design variables,and then to estimate design parameters and the main objective function of designs directly,speedily,and *** different optimization operations were carried out:One used the harmony search(HS)algorithm,combining different ranges of both HS parameters and iteration with population *** other used an estimation application that was done via artificial neural networks(ANN)to find out the estimated values of *** explore the estimation success of ANN models,different test cases were proposed for the three structural *** of the study suggest that ANN estimation for structures is an effective,successful,and speedy tool to forecast and determine the real optimum results for any design model.

关键词： optimization metaheuristic algorithms harmony search structural designs machine learning artificial neural networks

Cortical hem signaling center: functions, development, and potential implications for evolution and brain disorders

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Neural Regeneration Research 2025年第4期20卷 1079-1080页

作者： Victor V.Chizhikov Igor y.Iskusnykh Department of Anatomy and Neurobiology University of Tennessee Health Science CenterMemphisTNUSA

Development of the telencephalon relies upon several signaling centers-localized cellular populations that supply secreted factors to pattern the cortical *** such signaling center is the cortical hem,which arises during embryonic development at the telencephalic dorsal midline,adjacent to the choroid plexus and hippocampal primordium(Figure 1A).While the cortical hem has also been described in reptiles and birds,most of our knowledge about the developmental roles of the cortical hem is derived from the analysis in *** cortical hem produces several types of secreted molecules,including wingless-related integration site(Wnt)and bone morphogenetic(Bmp)*** cortical hem is particularly important for the development of the hippocampus,which is involved in learning and memory,and the neocortex,which is the most complex brain region that mediates multiple types of behavior and higher cognitive functions(Mangale et al.,2008;Dal-Valle-Anton and Borrell,2022).

关键词： epithelium Figure center

Giant magnetocaloric effect in Tb_5Ge_(2-x)Si_(2-x)Mn_(2x) compounds

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Chinese Physics B 2010年第5期19卷 542-548页

作者： E.yzak B.Emre y.Elerman A.ycel Department of Engineering Physics Faculty of EngineeringAnkara University06100 BesevlerAnkaraTurkey Faculty of Science and Letters Physics DepartmentMugla UniversityKtekli 48000 MuglaTurkey

The crystal structure, magnetic and magnetocaloric characteristics of the pseduo ternary compounds of TbsGe2-xSi2-xMn2x （0 ≤ 2x ≤ 0.1） were investigated by x-ray powder diffraction and magnetization measurements. The x-ray powder diffraction results show that all compounds preserve the monoclinic phase as the majority phase and all the synthesized compounds were observed to be ferromagnetic from magnetization measurements. Magnetic phase transitions were interpreted in terms of Landau theory. Maximum isothermal magnetic entropy change value （20.84 J-kg-1 -K-1） was found for Tb5Ge1.95Si1.95Mn0.1 at around 123 K in the magnetic field change of 5T.

关键词： magnetic properties magnetocaloric effect isothermal magnetic entropy change

Evalution of the Accuracy and Performance of Multi-GNSS(MGEX)Positioning for Long Baselines by Using Different Software

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Journal of Geodesy and Geoinformation Science 2023年第4期6卷 79-92页

作者： Atinc Pirti Mehmet Ali yücel Department of Surveying Engineering Davutpasa Yildiz Technical UniversityEsenler 34220Türkiye Department of Geomatics Engineering Canakkale Onsekiz Mart UniversityCanakkale 17100Türkiye

The Global Positioning System(GPS)is a GNSS constellation,but GNSS is not always *** is one of the GNSS constellations used around the *** GNSS constellations include GPS(US),QZSS(Japan),Beidou/BDS(China),Galileo(EU),and GLONASS(Russia).In 1999,the European Commission(EC)proposed the European Galileo satellite navigation system for the first time.A four-phase development was proposed,including public and private sector *** was intended for both civilian and government use,and is managed and controlled by civil *** is made up of 30 satellites,a number of globally distributed ground stations,and a ground control and monitoring system,all of which are extremely similar to the structure,format,and layout of *** this study,we investigate GPS/GLONASS/Galileo/Beidou/IRNSS/QZSS Navigation Satellite System integration algorithm for long baselines ranging from 1500 km to 3000 km in China,Japan and *** positioning performance with GPS/GLONASS/Galileo/BDS/IRNSS/QZSS,GPS-only,Galileo-only,GLONASS-only and BDS-only,*** compared in terms of the positioning *** improvement of positioning accuracy over long baselines can be found with GPS/GLONASS/Galileo/BDS/QZSS/IRNSS compared with that of GPS-only and that of *** obtained differences of the two baselines(Topcon Magnet Tools Software(Multi-GNSS)-(CSRS-PPP(GPS/GLONASS),(Trimble-RTX(GPS/GLONASS),(AUSPOS(GPS/GLONASS))Online Processing Software)by using GPS/GLONASS/Galileo/BDS/QZSS/IRNSS signals is between 40 cm and 111.5 cm on three days.

关键词： Multi-GNSS(MGEX) accuracy analysis improvement QZSS Beidou Galileo IRNSS

Methodology for determination of correction factors in direct gamma spectrometric measurement of radionuclides in sediments

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International Journal of Sediment Research 2017年第3期32卷 324-330页

作者： Esra Uyar Alptug ?zer yksel Rufiyet Gven Haluk ycel Ankara University Institute of Nuclear Sciences

In this study, the practical methodologies are described for the determination of the factors for the selfabsorption effect（Fs）, spectral interferences(Fcsi), and true coincidence summing effects(Fcoi), which are used in direct gamma-spectrometric measurement of radionuclides such as210Pb,238U,234Th,226Ra,214Pb,228Ac,208Tl,214Bi,137Cs and40K in samples. To validate the applied methods, certified reference materials（CRMs） of lake and stream sediments were measured with an n-type Germanium（Ge）detector-calibrated using a multinuclide reference source. The highest self-absorption correction factors ranged from Fs= 1.44-2.10 for 46.5 keV peak（210 Pb） and Fs= 1.25-1.60 for 63.3 keV peak(234Th) lying in the low energy region of the spectrum. The systematic influence was observed for 186.2 keV（226 Ra）peak due to spectral interferences with the 235 U contribution. For this peak, Fcsiis changed from 0.921 to0.955. Additionally, the present study suggests that true coincidence summing（TCS） effects are not dominant, except for 208 T1 and 214 Bi for which Fcoiranged from 1.179 to 1.192 an ranged from 1.140 to1.151, respectively.

关键词： Correction factor Self-absorption Spectral interference True coincidence summing Sediment Gamma-ray spectrometry

Exercise preconditioning alleviates ischemia-induced memory deficits by increasing circulating adiponectin

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Neural Regeneration Research 2025年第5期20卷 1445-1454页

作者： Meifeng Zheng Borui Zhang Sonata S y yau Kwok-Fai So Li Zhang Haining Ou Department of Rehabilitation Medicine Guangzhou Medical UniversityGuangzhouGuangdong ProvinceChina Department of Rehabilitation Medicine The Fifth Clinical College of Guangzhou Medical UniversityGuangzhouGuangdong ProvinceChina Key Laboratory of CNS Regeneration(Ministry of Education) Guangdong-Hong Kong-Macao Institute of CNS RegenerationJinan UniversityGuangzhouGuangdong ProvinceChina Department of Rehabilitation Sciences The Hong Kong Polytechnic UniversityHong Kong Special Administrative RegionChina State Key Laboratory of Brain and Cognitive Science Li Ka Shing Faculty of MedicineThe University of Hong KongHong Kong Special Administrative RegionChina Center for Exercise and Brain Science School of PsychologyShanghai University of SportShanghaiChina Neuroscience and Neurorehabilitation Institute University of Health and Rehabilitation SciencesQingdaoShandong ProvinceChina

Cerebral ischemia is a major health risk that requires preventive approaches in addition to drug *** exercise enhances neurogenesis and synaptogenesis,and has been widely used for functional rehabilitation after *** this study,we determined whether exercise training before disease onset can alleviate the severity of cerebral *** also examined the role of exercise-induced circulating factors in these *** mice were subjected to 14 days of treadmill exercise training before surgery for middle cerebral artery *** found that this exercise pre-conditioning strategy effectively attenuated brain infarct area,inhibited gliogenesis,protected synaptic proteins,and improved novel object and spatial memory *** analysis showed that circulating adiponectin plays a critical role in these preventive effects of *** activation of adiponectin receptors by Adipo Ron mimicked the effects of exercise,while inhibiting receptor activation abolished the exercise *** summary,our results suggest a crucial role of circulating adiponectin in the effects of exercise pre-conditioning in protecting against cerebral ischemia and supporting the health benefits of exercise.

关键词： adiponectin cerebral ischemia exercise pre-conditioning hippocampus memory function middle cerebral artery occlusion prefrontal cortex synaptic proteins treadmill exercise

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

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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

Probabilistic transitions for P systems

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Progress in Natural Science:Materials International 2007年第4期17卷 432-441页

作者： Gabriel Ciobanu Laura Cornǎcel "A. I. Cuza" University Faculty of Computer ScienceBlvd. Carol I No. 11700506 IasiRomania Romanian Academy Institute of Computer ScienceBlvd. Carol I No.8700505 IasiRomania

In this paper we use the abstract syntax and the structural operational semantics of the P systems given in [ 1 ], and add probabilities to the rules and to the communication targets. We take into account the number of possible combinations of rules which can be applied in a computation step, as well as the consumption degree of the current resources.

关键词： probabilistic transition P systems.

Targeted principle component analysis:A new motion artifact correction approach for near-infrared spectroscopy

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Journal of Innovative Optical Health Sciences 2014年第2期7卷 98-105页

作者： Meryen A.yücel Julitte Selb Robert J.C.ooper David A.Boas Athinoula A.Martinos Center for Biomedical Imaging Department of Radiology Massachusetts General Hospital Haruard Medical SchoolCharlestownMAUSA Department of Medical Physics and Bioengineering University College London LondonUK

As near-infrared spectroscopy(NIRS)broadens its application area to diferent age and diseasegroups,motion artifacts in the NIRS signal due to subject movement is becoming an *** artifacts generally produce signal fiuctuations that are larger than physio-logical NIRS signals,thus it is cruciai to corect for them before obtaining an cstimate ofstimulusevoked hemodynamic responses.,There are various methods for correction such as principlecomponent analy sis(P CA),wavelet-based filt ering and spline int ***,we introduce anew approach to motion artifact correction,targeted principle component analysis(PCA),which incorporates a PCA filter only on the segments of data identified as motion *** expected that this will overcome the issues of filtering desired signals that plagues standardPCA fitering of entire data *** compared the new approach with the most efiective motionartifact correction algorithms on a set of data acquired simultaneously with a collodion-fixedprobe(low motion artifact content)and a standard Velcro probe(high motion artifact content).Our results show that tPCA gives statistically better results in recovering hemodynamic responsefunction(HRF)as compared to wavelet-based fltering and spline interpolation for the *** resulis in a significant reduction in mean-squauared'error(MSE)and significant en-hancement in Pearson's correlation coeficient to the true HRF,The collodion-fixed fiber probewith no motion correction performed better than the Velcro probe corrected for motion artifactsin terms of MSE and Pearson's correlation ***,if the experimental study permits,the use of a collodion-fixed fiber probe may be desirable.I the use of a collodion-fixed probe is notfeasible,then we suggest the use of tP CA in the processing of motion artifact contaminated data.

关键词： Wavelet spline collodion-fixed fiber.