检索结果-南通市图书馆

Artificial Circulation System Algorithm:A Novel Bio-Inspired Algorithm

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computer Modeling in Engineering & Sciences 2025年第1期142卷 635-663页

作者： NerminÖzcan Semih Utku Tolga Berber Department of Biomedical Technologies Dokuz Eylül UniversityIzmir35390Turkey Department of Biomedical Engineering Iskenderun Technical UniversityIskenderun31200Turkey Department of Computer Engineering Dokuz Eylül UniversityIzmir35390Turkey Department of Statistics and Computer Sciences Karadeniz Technical UniversityTrabzon61080Turkey

Metaheuristics are commonly used in various fields,including real-life problem-solving and engineering appli*** present work introduces a novel metaheuristic algorithm named the Artificial Circulatory System Algorithm(ACSA).The control of the circulatory system inspires it and mimics the behavior of hormonal and neural regulators involved in this *** work initially evaluates the effectiveness of the suggested approach on 16 two-dimensional test functions,identified as classical benchmark *** method was subsequently examined by application to 12 CEC 2022 benchmark problems of different ***,the paper evaluates ACSA in comparison to 64 metaheuristic methods that are derived from different approaches,including evolutionary,human,physics,and ***,a sequence of statistical tests was undertaken to examine the superiority of the suggested algorithm in comparison to the 7 most widely used algorithms in the existing *** results show that the ACSA strategy can quickly reach the global optimum,avoid getting trapped in local optima,and effectively maintain a balance between exploration and *** outperformed 42 algorithms statistically,according to post-hoc *** also outperformed 9 algorithms *** study concludes that ACSA offers competitive solutions in comparison to popüler methods.

关键词： Bio-inspired evolutionary heuristic metaheuristic optimization

SYNTHESIS,CHARACTERIZATION AND SELECTIVITY STUDIES OF POLY(ACRYLAMIDE) INCORPORATING SCHIFF BASES

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 2009年第5期27卷 675-683页

作者： Nursen Sari Serkan zcan Department of Chemistry Faculty of ScienceGazi University

Three novel polymers incorporating Schiff bases,derived from condensation reactions of poly(acrylamide) with 5- chloro-2-hydroxybenzaldehyde,5-bromo-2-hydroxybenzaldehyde and 5-methyl-2-hydroxybenzaldehyde,have been synthesized,and their Cu(Ⅱ) and Ni(Ⅱ) complexes have been *** ~1H-NMR signals of the—CH=N—and—NH_2 groups have been utilized to determine the relative abundances of Schiff base and acrylamide groups in the polymers containing Schiff ***(acrylamide) incorporating Schiff bases and ...

关键词： Selectivity Incorporating Schiff bases Conductivity.

New combination in Veronica (Scrophulariaceae s.l.) based on morphological characters and the seed storage protein polymorphism

在线全文

学校读者我要写书评

暂无评论

Journal of Systematics and Evolution 2009年第2期47卷 168-172页

作者： Cem VURAL Servet zcan Mikail AKBULUT Faculty of Arts and Sciences Department of BiologyErciyes University

Veronica erciyasdagi(***) *** comb.& ***.,previously regarded as a variety,is proposed as a new combination,based on the morphological characters and seed storage protein polymorphism presented in this *** addition,information about the ecology and conservation status of Veronica erciyas-dagi was *** taxon is endemic to central Anatolia,Turkey and is critically endangered.

关键词： critically endangered plant morphology Scrophulariaceae seed storage protein polymorphism Veronica erciyasdagi

The behaviour of inlet roughness in lubrication of piston ring-cylinder liner

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China Mathematics 2001年第S1期44卷 14-19页

作者： KristianTφnder Norwegian University of Science and Technology

The improvement of lubrication of piston ring-cyinder liner is always in demand, andsurface roughness behaviour plays a very important role. The present paper will explore this be-haviour and investigate how the inlet roughness of ring influences the lubrication of pistonring-cylinder. The quantitative results of this combination of surface roughness on friction force, oilfilm thickness and frictional power loss are given and discussed.

关键词： inlet roughness lubrication piston ring cylinder liner

Design and simulation of a 1-GWp solar photovoltaic power station in Sudan

在线全文

学校读者我要写书评

暂无评论

Clean Energy 2021年第1期5卷 57-78页

作者： Sohaib Nasr Mohamed Abdalla HakanÖzcan Department of Mechanical Engineering Ondokuz Mayis UniversitesiSamsun 55139Turkey

Developing nations have a critical need to increase electricity *** has much unrealized potential for generating solar energy,particularly in the northern *** research study focuses on designing a 1-GW solar power station in northern Sudan using the PVsyst7.0 software *** determine the appropriate location for the solar-energy station,14 criteria were *** process is generic and suitable for use in any other *** method for conducting cash-flow estimates and return on investment is illustrated in the economic *** city of Dongola,the capital of the northern state,was selected because of its high annual irradiance on a horizontal surface at~2333.2 kWh/*** simulation results show that the annual optimum tilt angle of inclination for photovoltaic(PV)modules is 30°,the energy production is 1979259 MWh/yr and the average annual performance rate is *** addition,the electric power consumption per capita in Sudan is 269 kWh/yr,so the proposed solar power plant with 1979259 MWh/yr can provide energy to 7.4 million people per year annually and reduce carbon emissions by~18 million tons of carbon dioxide per *** calculations show that the levelized cost of electricity(LCOE)is$0.06/kWh,the discounted payback period is~11 years and the net present value is$*** a result,the proposed grid-connected PV solar plant is considered economically,technically and environmentally feasible in Sudan.

关键词： solar energy Sudan design simulation evaluation analytic hierarchy process photovoltaic

Monodisperse Nickel Nanoparticles Supported on SiO_(2) as an Effective Catalyst for the Hydrolysis of Ammonia-Borane

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2010年第9期3卷 676-684页

作者： Önder Metin SaimÖzkar Shouheng Sun Department of Chemistry Middle East Technical University06531AnkaraTurkey Department of Chemistry Brown UniversityProvidenceRhode Island 02912USA

Monodisperse Ni nanoparticles(NPs)have been synthesized by the reduction of nickel(Ⅱ)acetylacetonate with the borane–tributylamine complex in a mixture of oleylamine and oleic *** Ni NPs are an active catalyst for the hydrolysis of the ammonia–borane(AB,H3N⋅BH3)complex under ambient conditions and their activities are dependent on the chemical nature of the oxide support that they were deposited *** various oxides(SiO_(2),Al_(2)O_(3),and CeO_(2))tested,SiO_(2)was found to enhance Ni NP catalytic activity due to the etching of the 3.2 nm Ni NPs giving Ni(Ⅱ)ions and the subsequent reduction of Ni(Ⅱ)that led to the formation of 1.6 nm Ni NPs on the SiO_(2)*** kinetics of the hydrolysis of AB catalyzed by Ni/SiO_(2)was shown to be dependent on catalyst and substrate concentration as well as *** Ni/SiO_(2)catalyst has a turnover frequency(TOF)of 13.2 mol H_(2)⋅(mol Ni)^(–1)⋅min^(–1)—the best ever reported for the hydrolysis of AB using a nickel catalyst,an activation energy of 34 kJ/mol±2 kJ/mol and a total turnover number of 15,400 in the hydrolysis of *** is a promising candidate to replace noble metals for catalyzing AB hydrolysis and for hydrogen generation under ambient conditions.

关键词： Nickel nanoparticles supported catalyst hydrogen storage hydrolysis of ammonia-borane

Seed,germination,and seed-reserve traits differ along an altitudinal gradient

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Forestry Research 2022年第6期33卷 1903-1912页

作者： Muhammet Tonguç Sercan Önder Nesrin Gülcemal Fatih Tonguç Faculty of Agriculture Department of Agricultural BiotechnologyIsparta University of Applied Sciences32260 IspartaTurkey Faculty of Forestry Department of Forest EngineeringIsparta University of Applied Sciences32260 IspartaTurkey

Turkish red pine(P inus brutia Ten.), an important pine species for afforestation studies, grows at a wide range of altitudes in the eastern Mediterranean area. Seeds from low(0–400 m a.s.l.), mid(400–800 m) and high(800–1000 m) altitudinal gradients were collected to assess the effects of these gradients on morphological traits(seed length, seed width, 100-seed weight), germination variables(germination percentage and mean germination time), and 10biochemical variables related to seed reserves. Relationships among these variables were examined with a correlation analysis. Seeds from low and high altitudes had significantly higher 100-seed weight, higher percentage germination but longer germination times and higher total oil and reducing sugars contents. Seeds from mid altitudes had higher carotenoid and soluble phenolics contents. Among the examined biochemical variables, only flavonoid content did not differ among the altitude gradients. The main fatty acids in seeds samples(linoleic, oleic, palmitic and stearic acids) were also influenced by the altitude gradients. Oil and total reducing sugars contents were positively correlated with germination percentage, and carotenoid content was negatively correlated with germination percentage. Our results confirmed that seed and germination variables, including the reserve composition varied significantly among the altitudinal gradients.

关键词： Elevation Germination Pine Seed Seed reserves

Automated diagnosis and staging of Fuchs’endothelial cell corneal dystrophy using deep learning

在线全文

学校读者我要写书评

暂无评论

Eye and Vision 2020年第2期7卷 423-433页

作者： Taher Eleiwa Amr Elsawy EyüpÖzcan Mohamed Abou Shousha Bascom Palmer Eye Institute Miller School of MedicineUniversity of MiamiMiamiFlorida 33136USA Department of Ophthalmology Faculty of MedicineBenha UniversityBenhaEgypt Electrical and Computer Engineering University of MiamiCoral GablesFloridaUSA Net Eye Medical Center GaziantepTurkey Biomedical Engineering University of MiamiCoral GablesFloridaUSA

Background:To describe the diagnostic performance of a deep learning algorithm in discriminating early-stage Fuchs’endothelial corneal dystrophy(FECD)without clinically evident corneal edema from healthy and late-stage FECD eyes using high-definition optical coherence tomography(HD-OCT).Methods:In this observational case-control study,104 eyes(53 FECD eyes and 51 healthy controls)received HDOCT imaging(Envisu R2210,Bioptigen,Buffalo Grove,IL,USA)using a 6 mm radial scan pattern centered on the corneal *** was clinically categorized into early(without corneal edema)and late-stage(with corneal edema).A total of 18,720 anterior segment optical coherence tomography(AS-OCT)images(9180 healthy;5400 early-stage FECD;4140 late-stage FECD)of 104 eyes(81 patients)were used to develop and validate a deep learning classification network to differentiate early-stage FECD eyes from healthy eyes and those with clinical *** 5-fold cross-validation on the dataset containing 11,340 OCT images(63 eyes),the network was trained with 80%of these images(3420 healthy;3060 early-stage FECD;2700 late-stage FECD),then tested with 20%(720 healthy;720 early-stage FECD;720 late-stage FECD).Thereafter,a final model was trained with the entire dataset consisting the 11,340 images and validated with a remaining 7380 images of unseen AS-OCT scans of 41 eyes(5040 healthy;1620 early-stage FECD 720 late-stage FECD).Visualization of learned features was done,and area under curve(AUC),specificity,and sensitivity of the prediction outputs for healthy,early and late-stage FECD were ***:The final model achieved an AUC of 0.997±0.005 with 91%sensitivity and 97%specificity in detecting early-FECD;an AUC of 0.974±0.005 with a specificity of 92%and a sensitivity up to 100%in detecting late-stage FECD;and an AUC of 0.998±0.001 with a specificity 98%and a sensitivity of 99%in discriminating healthy corneas from all ***:Deep learning algorithm is an accurate autonomous nove

关键词： Optical coherence tomography Descemet’s membrane Corneal endothelium Fuchs endothelial dystrophy

Effect of colouring green stage zirconia on the adhesion of veneering ceramics with different thermal expansion coefficients

在线全文

学校读者我要写书评

暂无评论

International Journal of Oral Science 2013年第4期5卷 236-241页

作者： Guliz Aktas Erdal Sahin Pekka Vallittu Mutlu zcan Lippo Lassila Department of Prosthodontics Faculty of DentistryHacettepe University Department of Biomaterials Science and Turku Clinical Biomaterials Centre University of Turku Dental Materials Unit Center for Dental and Oral MedicineClinic for Fixed and Removable Prosthodontics and Dental Materials ScienceUniversity of Zrich

This study evaluated the adhesion of zirconia core ceramics with their corresponding veneering ceramics, having different thermal expansion coefficients （TECs）, when zirconia ceramics were coloured at green stage. Zirconia blocks （N=240; 6 mm x 7 mm x 7 mm） were manufactured from two materials namely, ICE Zirconia （Group 1） and Prettau Zirconia （Group 2）. In their green stage, they were randomly divided into two groups. Half of the specimens were coloured with colouring liquid （shade A2）, Three different veneering ceramics with different TEC （ICE Ceramic, GC Initial Zr and IPS *** Ceram） were fired on both coloured and non-coloured zirconia cores. Specimens of high noble alloys （Esteticor Plus） veneered with ceramic （VM 13）（n= 16） acted as the control group. Core-veneer interface of the specimens were subjected to shear force in the Universal Testing Machine （0.5 mm-min-1）. Neither the zirconia core material （P=0.318） nor colouring （P=0.188） significantly affected the results （three-way analysis of variance, Tukey＇s test）. But the results were significantly affected by the veneering ceramic （P=0.000）. Control group exhibited significantly higher mean bond strength values （45.7__.8） MPa than all other tested groups （（27.1__.4.1）-（39.7__.4.7） and （27.4__.5.6）-（35.9___4.7） MPa with and without colouring, respectively）（P^0.001）. While in zirconia-veneer test groups, predominantly mixed type of failures were observed with the veneering ceramic covering ~ 1/3 of the substrate surface, in the metal-ceramic group, veneering ceramic was left adhered 1/3 of the metal surface. Colouring zirconia did not impair adhesion of veneering ceramic, but veneering ceramic had a significant influence on the core-veneer adhesion. Metal-ceramic adhesion was more reliable than all zirconia-veneer ceramics tested.

关键词： adhesion bond strength colouring~ thermal expansion coefficient zirconia