检索结果-南通市图书馆

Investigation of N Deficiency in Cherry Trees Using Visible and Near-Infrared Spectra Part of the Spectrum in Field Condition

在线全文

学校读者我要写书评

暂无评论

光谱学与光谱分析 2017年第1期37卷 293-298页

作者： Levent Basayigit Mert Dedeoglu Hüseyin akgül kadir Ucgun Mesut Altindal Suleyman Demirel Univ. Fac. of. Agrie. Dept. of Soil Soil Sei. and Plant Nutr. Isparta Turkey Selcuk Univ. Fac. of. Agric. Dept. of Soil Soil Sci. and Plant Nutr. Konya Turkey Institute of Egirdir Horticultural research Isparta Turkey

This objective of the study was to develop a model for the determination of N deficiency in cherry trees using a combination of visible near infrared methods and spectro-radiometric *** our experimental design,cherry seedlings were grown under various N deficiency conditions in nutrient-controlled *** reflectance values of plant leaves were measured using a *** leaves samples were simultaneously *** nutrient contents were determined in the ***,we performed a statistical comparison of the reflectance *** analysis results established the significant ***,we received accurate regression models for predicting N deficiency in cherry leaves that were grown in nutrient ***,we verified the model validity by measuring the reflectance of the leaves collected from cherry orchards at various locations using a *** deficiencies were calculated using the developed model,and then,the predicted and measured data were compared to evaluate model *** these results,we determined the wavelengths that yielded the most accurate results for N prediction,selected from the blue and green regions of the *** established that for N prediction in cherry trees,the simplest model can be created using 560and 570nm ***,the evaluated model can be applicable only under certain *** concluded that in order to develop aprediction method with sufficient application capacity,as well as the ability to assess nutritional and physiological characteristics,the ecology condition of the plant should be properly considered based on the model.

关键词： Cherry Handheld field spectroradiometer Hyperspectral sensing N deficiency reflectance

Impact of lepton pT threshold on charge asymmetry predictions for inclusive Wboson production in pp collisions at 13 TeV

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2021年第8期45卷 36-44页

作者： kadir Ocalan Necmettin Erbakan University Faculty of Aviation and Space SciencesKonyaTurkey

This paper presents the impact of the lepton transverse momentum p^(l)_(T) threshold on the W boson charge asymmetry predictions in perturbative QCD for the inclusive W^(±)+X→l^(±)v+X production in proton-proton(pp)*** predictions are obtained at various low-p^(l)_(T) thresholds p^(l)_(T)>20,25,30,and 40 GeV in a fiducial region encompassing both the central and forward detector acceptances in terms of the lepton pseudorapidity 0≤ηl≤redicted distributions for the lepton charge asymmetry,which is defined by ηl(Aηl),at the next-to-next-to-leading order(NNLO)accuracy are compared with the CMS and LHCb data at 8 TeV center-of-mass collision *** 8 TeV predictions reproduce the data fairly well within the quoted *** predictions from the CT14 parton distribution function(PDF)model are in a slightly better agreement with the data over the other PDF sets that are *** 13 TeV predictions using various p^(l)_(T) thresholds are reported for An,and the charge asymmetries that are defined in terms of the differential cross sections in bins of the W boson rapidity yw(A_(yw))and transverse momentum(Apw).The NNLO predictions for the Ayw,and Apw distributions are assessed to be in close correlation with the plT *** An,and A_(yw) distributions are particularly shown to be more correlated at a higher ^(l)_(T) *** Apw distributions are also reported from the merged predictions with improved accuracy by the inclusion of the next-to-next-to-next-to-leading logarithm(N^(3)LL)corrections,i.e.,at NNLO+N^(3)*** predicted distributions from various ^(l)_(T) thresholds represent a finer probe in terms of the capability to provide more constraints on the ratio of u and d quark distribution functions in the parton momentum fraction range 10^(-4)

关键词： high energy physics phenomenology perturbative QCD calculations W bosons W boson charge asymmetries lepton transverse momentum threshold

NNLO QCD predictions of electron charge asymmetry for inclusive pp→W+X production in forward region at 13 and 14 TeV

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2021年第6期45卷 66-73页

作者： kadir Ocalan Necmettin Erbakan University Faculty of Aviation and Space SciencesKonyaTurkey

This paper presents perturbative QCD predictions of the electron charge asymmetry for inclusive W^(±)X→e^(±)v+X production in proton-proton(pp)*** QCD calculations are performed at next-to-next-to-leading order(NNLO)accuracy using different parton distribution function(PDF)modelsat 8,13,and 14 TeV center-of-mass energies of CErN LHC pp *** calculations are performed for electrons with transverse momenta above 20 GeV in the forward electron pseudorapidity region 2.0≤ne≤*** predictions are first compared at 8 TeV with the measurements of the LHCb experiment at the LHC for the W^(±)/W^(-)cross section ratio and charge asymmetry *** 8 TeV predictions using NNPDF3.1,CT14,and MMHT2014 PDF sets are reported to be in good agreement with the LHCb data for the entire ne region,justifying the extension of the calculations to 13 and 14 TeV *** charge asymmetry predictions at NNLO accuracy are reported in the forward ne bins at 13 and 14 TeV and compared among NNPDF3.1,CTI4,and MMHT2014 PDF ***,the predicted W^(±)differential cross-section and charge asymmetry distributions based on different PDF scts are found to be consistent with each other for the entire ne *** charge asymmetry distributions are shown to be more sensitive to discriminate among different PDF models in terms of the 14 TeV predictions.

关键词： high energy physics phenomenology perturbative QCD calculations W bosons W boson charge asymmetry

Investigation of the parameters affecting the behavior of rC beams strengthened with FrP

在线全文

学校读者我要写书评

暂无评论

Frontiers of Structural and Civil Engineering 2022年第6期16卷 729-743页

作者： kadir SEngUN Guray ArSLAN Department of Civil Engineering Yildiz Technical UniversityIstanbul 34220Turkey

Three-point bending tests were carried out on nineteen reinforced Concrete(rC)beams strengthened with FrP in the form of completely *** strip width to spacing ratios,FrP type,shear span to effective depth ratios,the number of FrP layers in shear,and the effect of stirrups spacing were the parameters investigated in the experimental *** FrP contribution to strength on beams having the same strip width to spacing ratios could be affected by the shear span to effective depth ratios and stirrups *** FrP contributions to strength were less on beams with stirrups in comparison to the tested beams without *** rC beams using FrP could change the failure modes of the beams compared to the reference *** addition to the experimental study,a number of equations used to predict the FrP contribution to the shear strength of the strengthened rC beams were assessed by using a limited number of beams available in the *** effective FrP strain is predicted by using test results,and this prediction is used to calculate the FrP contribution to shear strength in ACI 440.2r(2017)*** on the statistical values of the data,the proposed equation has the lowest coefficient of variation(COV)value than the other equations.

关键词： carbon glass strengthening shear strength reinforced concrete beam fiber reinforced polymer

Optical Characterization of Amorphous Hydrogenated Carbon(a-C:H)Thin Films Prepared by Single rF Plasma Method

在线全文

学校读者我要写书评

暂无评论

Plasma Science and Technology 2015年第6期17卷 488-495页

作者： Dogan MANSUrOGLU kadir GOKSEN Sinan BILIKMEN Physics Department Middle East Technical University Physics Department Duzce University

Methane （CH4） plasma was used to produce amorphous hydrogenated carbon （a- C：H） films by a single capacitively coupled radio frequency （rF） powered plasma system. The system consists of two parallel electrodes： the upper electrode is connected to 13.56 MHz rF power and the lower one is connected to the ground. Thin films were deposited on glass slides with different sizes and on silicon wafers. The influence of the plasma species on film characteristics was studied by changing the plasma parameters. The changes of plasma species during the deposition were investigated by optical emission spectroscopy （OES）. The structural and optical properties were analyzed via Fourier transform infrared （FTIr） spectroscopy, X-ray diffraction （XrD） and UV-visible spectroscopy, and the thicknesses of the samples were measured by a profilometer. The sp3/sp2 ratio and the existing H atoms play a significant role in the determination of the chemical properties of thin films in the plasma. The film quality and deposition rate were both increased by raising the power and the flow rate.

关键词： a-C:H thin film plasma deposition methane plasma sp3/sp2 ratio

Geotechnical investigations and remediation design for failure of tunnel portal section： a case study in northern Turkey

在线全文

学校读者我要写书评

暂无评论

Journal of Mountain Science 2017年第6期14卷 1140-1160页

作者： Ayberk KAYA kadir KArAMAN Fikri BULUT recep Tayyip Erdogan University Faculty of Engineering Department of Geological Engineering 53100 Rize Turkey Karadeniz Technical University Faculty of Engineering Department of Mining Engineering 61080 Trabzon Turkey Karadeniz Technical University Faculty of Engineering Department of Geological Engineering 61080 Trabzon Turkey

Mass movements are very common problems in the eastern Black Sea region of Turkey due to its climate conditions, geological, and geomorphological characteristics. High slope angle, weathering, dense rainfalls, and anthropogenic impacts are generally reported as the most important triggering factors in the region. Following the portal slope excavations in the entrance section of Cankurtaran tunnel, located in the region, where the highly weathered andesitic tuff crops out, a circular toe failure occurred. The main target of the present study is to investigate the causes and occurrence mechanism of this failure and to determine the feasible remedial measures against it using finite element method(FEM) in four stages. These stages are slope stability analyses for pre-and postexcavation cases, and remediation design assessments for slope and tunnel. The results of the FEM-SSr analyses indicated that the insufficient initial support design and weathering of the andesitic tuffs are the main factors that caused the portal failure. After installing a rock retaining wall with jet grout columns and reinforced slope benching applications, the factor of safety increased from 0.83 to 2.80. In addition toslope stability evaluation, the rock Mass rating(rMr), rock Mass Quality(Q) and New Austrian Tunneling Method(NATM) systems were also utilized as empirical methods to characterize the tunnel ground and to determine the tunnel support design. The performance of the suggested empirical support design, induced stress distributions and deformations were analyzed by means of numerical modelling. Finally, it was concluded that the recommended stabilization technique was essential for the dynamic long-term stability and prevents the effects of failure. Additionally, the FEM method gives useful and reasonably reliable results in evaluating the stability of cut slopes and tunnels excavated both in continuous and discontinuous rock masses.

关键词： Portal failure Stability analysis Finite element method Tunnel support design remedial measures rock Mass rating(rMr) rock Mass Quality(Q) New Austrian Tunneling Method(NATM)

A comparative assessment of rock mass deformation modulus

在线全文

学校读者我要写书评

暂无评论

International Journal of Mining Science and Technology 2015年第5期25卷 735-740页

作者： kadir Karaman Ferdi Cihangir Ayhan Kesimal Department of Mining Engineering Karadeniz Technical University

Deformation modulus of a rock mass(E_m) is one of the most important design parameters in construction of rock engineering projects such as underground ***,difficulties are frequently encountered during in-situ tests which are also time-consuming and expensive for determining this *** E_m is often estimated indirectly from proposed equations by different researchers,many of these equations cannot be used in case of problematic rock conditions(thinly bedded,highly jointed rock masses,etc.) as high quality core samples are *** study aims to explore more practical and useful equation for E_m estimation using rock Quality Designation(rQD) and point load index *** were made between available empirical equations and the proposed E_m equation in terms of the estimation *** comparison tests(ANOVA) showed that E_m can be reliably estimated using proposed equation especially at the preliminary stages of projects.

关键词： rock mass deformation modulus rQD rMr Q rMi Point load index

Biosorption of Cu^(2+) and Zn^(2+) by raw and autoclaved rocella phycopsis

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2010年第3期22卷 367-373页

作者： Emine Yalcln Kltigin avusoglu kadir Klnalloglu Department of Biology Faculty of Science and Art University of Giresun 28049 Debboy Location Giresun-Turkey

The behavior of Cu2＋ and Zn2＋ biosorption onto raw and modified roccella phycopsis from aqueous solutions was studied. Modification process was applied by autoclavation at 121°C for 30 min. The effcts of pH, initial metal concentration and biosorbent dosage were investigated. The maximum Cu2＋ biosorption was achieved at pH 5.0 and the maximum biosorption capacities of 31.5 and 37.8 mg/g were recorded for raw and modified biosorbent, respectively. In the case of Zn2＋ biosorption, maximum biosorption capacities were obtained at pH 4.0 as 29.1 and 35.3 mg/g for raw and modified biosorbent, respectively. Biosorption of Zn2＋ and Cu2＋ on all form of r. phycopsis increased much quickly with increasing initial metal concentrations from 10 to 100 mg/L. After modification process, probable changes in the surface polarity of raw and modified r. phycopsis were investigated by contact angle measurements. As expected, r. phycopsis has a polar surface and shows a highest contact angle with water, while after autoclavation water contact angle of r. phycopsis was significantly decreased from 47.5° to 34.4°.

关键词： biosorption roccella phycopsis polarity contact angle measurement

relational Turkish Text Classification Using Distant Supervised Entities and relations

在线全文

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2024年第5期79卷 2209-2228页

作者： Halil Ibrahim Okur kadir Tohma Ahmet Sertbas Department of Computer Engineering Faculty of Engineering and Natural SciencesIskenderun Technical UniversityHatay31200Turkey Department of Computer Engineering Faculty of EngineeringIstanbul University-CerrahpasaIstanbul34310Turkey

Text classification,by automatically categorizing texts,is one of the foundational elements of natural language processing *** study investigates how text classification performance can be improved through the integration of entity-relation information obtained from the Wikidata(Wikipedia database)database and BErTbased pre-trained Named Entity recognition(NEr)*** on a significant challenge in the field of natural language processing(NLP),the research evaluates the potential of using entity and relational information to extract deeper meaning from *** adopted methodology encompasses a comprehensive approach that includes text preprocessing,entity detection,and the integration of relational *** conducted on text datasets in both Turkish and English assess the performance of various classification algorithms,such as Support Vector Machine,Logistic regression,Deep Neural Network,and Convolutional Neural *** results indicate that the integration of entity-relation information can significantly enhance algorithmperformance in text classification tasks and offer new perspectives for information extraction and semantic analysis in NLP *** of this work include the utilization of distant supervised entity-relation information in Turkish text classification,the development of a Turkish relational text classification approach,and the creation of a relational *** demonstrating potential performance improvements through the integration of distant supervised entity-relation information into Turkish text classification,this research aims to support the effectiveness of text-based artificial intelligence(AI)***,it makes significant contributions to the development ofmultilingual text classification systems by adding deeper meaning to text content,thereby providing a valuable addition to current NLP studies and setting an important reference point for future research.

关键词： Text classification relation extraction NEr distant supervision deep learning machine learning