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自动化学报 1991年第4期17卷 466-470页

作者：裘聿皇 Deborah E.Reeves yaman arkun 中国科学院自动化研究所美国乔治亚理工学院

本文介绍非方的分散控制系统的块相对增益,并给出有关的性质和应用的例子.

关键词：分散控制系统交互量测

Surface-to-bed heat transfer for high-density particles in conical spouted and spout–fluid beds

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Particuology 2019年第1期17卷 35-47页

作者： Onur yaman Gorkem Kulaha Murat Koksalb Department of Chemical Engineering Middle East Technical University06800 AnkaraTurkey Department of Mechanical Engineering Hacettepe University06800 AnkaraTurkey

Bed-to-surface heat transfer experiments from a vertically submerged cylindrical surface were conducted in laboratory-scale (Dc = 25 cm) conical spouted and spout–fluid beds at two different conical angles (31° and 66°) in the high particle density range (2500 kg/m3 ≤ρp ≤ 6000 kg/m3). The effects of the bed design parameters (conical angle and inlet diameter of spouting gas entrance) and operating conditions (static bed height, particle size, density, and spouting and fluidization gas flow rates) on the heat transfer characteristics were investigated in detail. The heat transfer coefficients were shown to be dependent on the density and size of the particles. The minimum stable spouting velocities of the denser and larger particles were higher, which led to higher operational spouting velocities and thereby resulted in higher heat transfer coefficients. The positive effect of increasing the particle diameter on heat transfer was more pronounced in the spout and at the spout–annulus interface, whereas this effect was diminished in the annulus region. The heat transfer coefficient increased with increasing spouting gas velocity up to 1.0Ums–1.1Ums, beyond which no significant change was observed regardless of the particle type. The heat transfer coefficient in the annulus decreased with increasing conical angle because of reduced particle circulation. The spout–fluid operation increased the heat transfer coefficient by a maximum of 10% at the expense of a significant increase of the total gas flow rate. This result was attributed to the inability of the fluidizing gas to penetrate the annulus. An empirical correlation for the average heat transfer coefficient in the annulus was also proposed based on the data obtained in this work.

关键词： Conical spouted bed Spout–fluid bed Bed-to-surface heat transfer Submerged heat transfer surface

Comparative tree-ring anatomy of Fraxinus excelsior with Chalara dieback

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Journal of Forestry Research 2018年第6期29卷 1741-1749页

作者： Mirela Tulik Barbaros yaman Nesibe Kose Department of Forest Botany Warsaw University of Life Sciences– SGGWWarsaw 02-787Poland Wood Anatomy and Dendrochronology Laboratory Bartin UniversityFaculty of ForestryBartinTurkey Department of Forest Botany Istanbul UniversityFaculty of Forestry34473 IstanbulTurkey

We tested the hypothesis that the biometrical characters of wood elements in ash trees(Fraxinus excelsior L.) become modified in response to the progression of disease caused by Chalara fraxinea. Anatomical analyses were performed on wood samples collected at breast height from the trunks of groups of ash trees which contained healthy, weakened and dead trees. We measured(1) treering width,(2) earlywood vessel diameter,(3) earlywood vessel element length,(4) fibre length,(5) fibre diameter,(6) fibre lumen diameter, and(7) fibre wall thickness. We showed that tree-ring width diminished in all analysed groups during disease progression. However, the greatest suppression of growth was observed in dead trees. In both weakened and dead ash trees, the reduction in tree-ring width was accompanied by diminished vessel diameter in the earlywood of the outermost annual rings. The annual rings of dead trees had shorter fibres having greater lumen diameter and thinner cell walls. Consequently, water conduction in the sapwood of dead ash trees was less efficient owing to reduced vessel diameter, and this seems to be one of the greatest disease-induced morphological modifications. All the anatomical modifications might be due to leaf loss and crown dieback triggered by Chalara fraxinea.

关键词： Ash Dieback Fibres Vessels Wood

No evidence of predator odor avoidance in a North American bird community

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Avian Research 2024年第1期15卷 133-138页

作者： Austin Dotta Batur yaman Alex Van Huynh Department of Biology DeSales University2755 Station AvenueCenter ValleyPAUSA

Recent advances in our understanding of avian chemical communication have highlighted the importance of olfaction in many aspects of avian *** studies investigating predator avoidance behaviors in response to predator odor cues have produced mixed results across species and *** we assess if a community of birds in eastern Pennsylvania displays avoidance behaviors towards predator odor cues in a natural foraging *** use clay caterpillars to measure foraging activity by birds in the presence of predator(bobcat)urine,non-predator(rabbit)urine,and water controls in two different environmental contexts(field ***).Although we detected a weak trend for birds to forage less at predator urine-treated sites,we found no significant difference in avian foraging between the site *** did find that foraging rates between environmental contexts changed significantly over the course of the experiment,with forest sites showing decreasing foraging rates and field sites showing increasing foraging *** results reinforce the published literature that avoidance of predator odors by birds may not be ubiquitous across contexts and species.

关键词： Foraging Odor Olfaction Predation Predator-avoidance

Deep learning model for estimating the mechanical properties of concrete containing silica fume exposed to high temperatures

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Frontiers of Structural and Civil Engineering 2020年第6期14卷 1316-1330页

作者： Harun TANYILDIZI Abdulkadir SENGUR yaman AKBULUT Murat SAHtNa Faculty of Technology Department of Civil EngineeringFirat UniversityElazig 23100Turkey Faculty of Technology Department of Electrical-Electronics EngineeringFir at UniversityElazig 23100Turkey

In this study,the deep learning models for estimating the mechanical properties of concrete containing silica fume subjected to high temperatures were *** fume was used at concentrations of 0%,5%,10%,and 20%.Cube specimens(100 mm×100 mm×100 mm)were prepared for testing the compressive strength and ultrasonic pulse *** were cured at 20℃zb2℃ in a standard cure for 7,28,and 90 *** curing,they were subjected to temperatures of 20℃,200℃,400℃,600℃,and 800℃.Two well-known deep learning approaches,i.e.,stacked autoencoders and long short-term memory(LSTM)networks,were used for forecasting the compressive strength and ultrasonic pulse velocity of concrete containing silica fume subjected to high *** forecasting experiments were carried out using MATLAB deep learning and neural network tools,*** statistical measures were used to validate the prediction performances of both the *** study found that the LSTM network achieved better results than the stacked *** addition,this study found that deep learning,which has a very good prediction ability with little experimental data,was a convenient method for civil engineering.

关键词： concrete high temperature strength properties deep learning stacked auto-encoders LSTM network

Variations in Toxic Metal Levels of Two Fish Species, Pomatomus saltatrix and Dicentrarchus labrax, and Risk Estimation for Children

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光谱学与光谱分析 2014年第2期34卷 300-307页

作者： Mehmet yaman Ibrahim H yaman Firat University Sciences FacultyDepartment of ChemistryElazig-Turkey Carsamba State Hospital Part of Children&#39 s Diseases CarsambaSamsun-Turkey

The concentrations of five toxic metals were monthly determined in two fish species,obtained from fish markets in Turkey during 2010—*** the determinations,AAS and ICP-AES were *** obtained lead concentrations for all studied Pomatomus saltatrix(mean 635μg·kg-1)and Dicentrarchus labrax(mean 463μg·kg-1)samples were found to be significantly higher than the maximum allowances concentration(MAC)of 300μg·*** chromium(324μg·kg-1)and Cu(940μg·kg-1)concentrations in Pomatomus saltatrix were higher than in Dicentrarchus labrax(268μg Cr·kg-1 and 600μg Cu·kg-1)while Ni in Pomatomus saltatrix(216μg·kg-1)was lower in Dicentrarchus labrax(291μg·kg-1).The estimated non-carcinogenic and carcinogenic health risks by the Target Hazard Quotient and target carcinogenic risk indicate that there are no sytemic effects,and the risk of developing cancer over a human lifetime is between 2~9in 1 000 000.

关键词： Toxic metals Fish Atomic absorption ICP-AES Risk assessment

Assessment of the implementation status of best available techniques for cleaner production in the textile industry

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Frontiers of Environmental Science & Engineering 2024年第8期18卷 133-148页

作者： Mehmet Eren yaman Emrah Ozturk Ulku Yetis Mehmet Kitis Department of Environmental Engineering Suleyman Demirel UniversityIsparta 32260Turkey Department of Environmental Protection Technologies Isparta University of Applied SciencesIsparta 32200Turkey Department of Environmental Engineering Middle East Technical UniversityAnkara 06800Turkey

The draft Integrated Pollution Prevention and Control(IPPC)regulation mandates compliance with best available techniques(BATs)for textile manufacturers.A study in Turkish textile facilities,covering 56 units across four sub-sectors,assessed the status of 488 BATs through on-site visits and *** aim was to gauge the sector’s adherence to *** findings revealed that 37% of surveyed BATs were fully implemented,rising to 88% when considering potential future *** suggests a strong industry inclination toward adopting BATs for cleaner production and *** study highlighted significant BAT-related investments in the textile sector,driven by environmental concerns,regulations,customer demands,resource efficiency,competition,and cost-benefit ***,the study results also indicated that there is still much work to do for the implementation of some *** was found that 60 BATs had lower implementation ratios(IR:0%-43%).Lower IR values for these BATs are mainly due to factors like specificity,high costs,long payback periods,operational difficulties,limited expertise,space constraints,customer requirements,quality concerns,operational issues,and sector-specific *** study recommends similar assessments in other European industrial sectors to evaluate compliance with mandatory BATs outlined in the Industrial Emissions *** insights from this study on the Turkish textile sector can serve as a valuable guide for future evaluations.

关键词： Best available techniques(BAT) Cleaner production Green Deal Integrated Pollution Prevention and Control(IPPC) Textile sector

6D pose annotation and pose estimation method for weak-corner objects under low-light conditions

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Science China(Technological Sciences) 2023年第3期66卷 630-640页

作者： JIANG ZhiHong CHEN JinHong JING yaman HUANG Xiao LI Hui School of Mechatronic Engineering Beijing Institute of TechnologyBeijing 100081China Beijing Advanced Innovation Center for Intelligent Robots and Systems Beijing 100081China Key Laboratory of Biomimetic Robots and Systems Ministry of EducationBeijing 100081China

In unstructured environments such as disaster sites and mine tunnels,it is a challenge for robots to estimate the poses of objects under complex lighting backgrounds,which limit their *** to the shadows produced by a point light source,the brightness of the operation scene is seriously unbalanced,and it is difficult to accurately extract the features of *** is especially difficult to accurately label the poses of objects with weak corners and *** study proposes an automatic pose annotation method for such objects,which combine 3D-2D matching projection and rendering technology to improve the efficiency of dataset annotation.A 6D object pose estimation method under low-light conditions(LP_TGC)is then proposed,including(1)a light preprocessing neural network model based on a low-light preprocessing module(LPM)to balance the brightness of a picture and improve its quality;and(2)a 6D pose estimation model(TGC)based on the keypoint *** typical datasets are constructed to verify our method,the experimental results validated and demonstrated the effectiveness of the proposed LP_TGC *** estimation model based on the preprocessed image can accurately estimate the pose of the object in the mentioned unstructured environments,and it can improve the accuracy by an average of~3%based on the ADD metric.

关键词： 6D object pose estimation 6D pose annotation low-light conditions

Wear performance of in-situ aluminum matrix composite after micro-arc oxidation

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Transactions of Nonferrous Metals Society of China 2013年第2期23卷 347-352页

作者： yaman ERARSLAN Department of Metallurgical and Materials Engineering Faculty of Chemical and Metallurgical Engineering Yildiz Technical University

An attempt was made to modify the surface of in-situ aluminium matrix composite （AMC） by micro-arc oxidation （MAO）. In the microstructure of AMC, CuAl2 reinforcements were generated by introducing 15% CuO into the aluminium melt. AMC was hot forged, homogenised, quenched and artificially aged before the MAO in a KOH, KF and Na2SiO3-containing electrolyte. After the MAO process the surface of the AMC was covered with Al2O3 coating having an effective thickness of about 15μm. Appearance of crack and/or delamination free zones at the periphery of the indent after the Rockwell C adhesion test indicated good adhesion between the composite and the Al2O3 coating. During dry sliding wear tests, this adherent Al2O3coating resisted the destructive action of the Al2O3 ball and provided about 15 times enhancement in wear resistance as compared to the original state.

关键词： in situ composite aluminum matrix composite microarc oxidation wear tribology

Examination of Element Concentrations in Groundwater by ICP-MS for Monitoring of Pre-Earthquake Activities

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光谱学与光谱分析 2013年第1期33卷 1-6页

作者： Mehmet yaman Ahmet Sasmaz Firat University Sciences FacultyDepartment of ChemistryElazigTurkey Firat University Engineering FacultyDepartment of GeologyElazigTurkey

This study presents the results of hydrogeochemical studies carried out in Zeytun thermal springs in Kahramanmaras,located South Middle *** than 90thermal water samples were collected on a regular basis from 2006to 2008to measure element concentrations as a monitor of earthquake *** samples were analyzed using *** observed B,Ba,Br and Ge concentrations for 16months are in ranges of 79～422,103～167,28～93and 0.3～1.2 μ g.L-1,*** concentrations for these periods are in range of 7～*** data identify some element anomalies before *** anomalies are characterized by decreases up to 158%in Ba and Cl *** occurrence of these anomalies can be attributed to stress / strain induced pressure changes in the subsurface water *** can be suggested that the thermal springs in the fault line area are ideal sites for precursors of earthquakes.

关键词： Earthquake Groundwater Elements Precursory ICP-MS