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| 1 | Artificial neural network models predicting the leaf area index:a case study in pure even-aged Crimean pine forests from Turkey显示文摘Background: Leaf Area Index(LAI) is an important parameter used in monitoring and modeling of forest ecosystems. The aim of this study was to evaluate performance of the artificial neural network(ANN) models to predict the LAI by comparing the regression analysis models as the classical method in these pure and even-aged Crimean pine forest stands.Methods: One hundred eight temporary sample plots were collected from Crimean pine forest stands to estimate stand parameters. Each sample plot was imaged with hemispherical photographs to detect the LAI. The partial correlation analysis was used to assess the relationships between the stand LAI values and stand parameters, and the multivariate linear regression analysis was used to predict the LAI from stand parameters. Different artificial neural network models comprising different number of neuron and transfer functions were trained and used to predict the LAI of forest stands.Results: The correlation coefficients between LAI and stand parameters(stand number of trees, basal area, the quadratic mean diameter, stand density and stand age) were significant at the level of 0.01. The stand age, number of trees, site index, and basal area were independent parameters in the most successful regression model predicted LAI values using stand parameters(/?;adj = 0.5431). As corresponding method to predict the interactions between the stand LAI values and stand parameters, the neural network architecture based on the RBF 4-19-1 with Gaussian activation function in hidden layer and the identity activation function in output layer performed better in predicting LAI(SSE(12.1040), MSE(0.1223), RM5 E(0.3497), AIC(0.1040), BIC(-777310) and R2(0.6392)) compared to the other studied techniques.Conclusion: The ANN outperformed the multivariate regression techniques in predicting LAI from stand parameters. The ANN models, developed in this study, may aid in making forest management planning in study forest stands. | ilker Ercanli Alkan Gunlu Muammer Senyurt Sedat Keles | 2018 | Forest Ecosystems2018，5，4： | 4 |
| 2 | Strong strain path dependence of strain localizations and fracture in magnesium AZ31 sheet显示文摘This study compares the deformation and fracture behavior of a basal-textured Mg AZ31 alloy sheet under uniaxial tension and biaxial stretching by using an in-plane biaxial test setup capable of observing and measuring the deformation at both meso(millimeter)and microstructure scales.Strain distributions at the mesoscale and accompanying fracture surfaces indicate a significant dependence on strain path.At the microscale,limited slip activity in biaxial case promotes contraction twins,where severe strain localizations(εmax/εmean≈220)to the twins and their boundaries cause mainly transgranular fracture.This leads to a brittle,and a more pronounced shear-type fracture under biaxial stretching.In uniaxial case,considerable tensile twinning activity reorients the initial texture for slip activity.Strain localizations(εmax/εmean≈2)to the grain interiors and boundaries initiate mainly intergranular fracture.Samples fail by displaying both brittle and ductile fracture structures,with smaller shear lips compared to the biaxial case. | Kivanc Alkan O.Berk Aytuna Baran Guler Mert Efe | 2020 | Journal of Magnesium and Alloys2020，8，2： | 2 |
| 3 | Rock salt dilatancy boundary from combined acoustic emission and triaxial compression tests显示文摘 | H. Alkan Y. Cinar G. Pusch | 2006 | International Journal of Rock Mechanics and Mining Sciences2006，，1： | 2 |
| 4 | Percolation model for dilatancy-induced permeability of the excavation damaged zone in rock salt显示文摘 | Hakan Alkan | 2008 | International Journal of Rock Mechanics and Mining Sciences2008，，4： | 2 |
| 5 | Uptake of trivalent chromium ions from aqueous solutions using kaolinite 显示文摘 | Pinar Turan Mehmet Dogan Mahir Alkan | 2007 | Journal of Hazardous Materials2007，148，12： | 1 |
| 6 | BCL-6 protein expression by follicle center lymphomas:A marker for d ifferentiating follicle center lymphomas from other low-grade lymphoproliferative disorders显示文摘 | Raible M D His E D Alkan S | 1999 | Am J Clin Pathol1999，112，1： | 1 |
| 7 | The effect of perioperative infused dexmidetomidine on postoperative analgesic consumption in rnastoidectomy operations 显示文摘 | Si'dlei AT Ozyuvaci E Alkan Z | 2010 | J Turkish Soc Algol2010，22，3： | 1 |
| 8 | Preparation and character- ization of sepiolite-poly (ethyl methacrylate) and poly (2- hydroxyethyl methacrylate) nanocomposites 显示文摘 | Benlikayal R Alkan M | 2009 | Poly- mer Composites2009，30，11： | 1 |
| 9 | Thermal conductivity and latent heat thermal energy storage characteristics of paraffin/expanded graphite composite as phase change material显示文摘 | Ahmet Sari Cemil Alkan | 2007 | Applied thermal engineering2007，27，： | 1 |
| 10 | Eleetrokinetic and adsorption properties of seplollte modified by 3-aminopropyltriethoxysilane 显示文摘 | Demirbas O Alkan M Dogan M | 2007 | Journal of Hazardous Materials2007，149，3： | 1 |
| 11 | Fatty acid/paly ( methylmethacrylate ) ( PMMA ) blends as form-stable phase change materials for latent heat thermal energy storage 显示文摘 | Alkan C Sari A | 2008 | Solar Energy2008，82，： | 1 |
| 12 | Effects of citicoline used alone and in combination with mild hypothermia on apoptosis induced by focal cerebral ischemia in rats显示文摘 | Sahin S Alkan T Temel SG | 2010 | J Clin Neurosci2010，17，2： | 1 |
| 13 | Neuroprotective effects of MK 801 and hypothermia used alone and in combinationin hypoxic-ischemic brain injury in neonatal rats显示文摘 | ALKAN T KAHVECI N BUYUKUYSAL L | 2001 | Arch Physiol Biochem2001，109，2： | 1 |
| 14 | Spectrophotometric determination of molybdenum with Alizarin Red S in the presence of poly (sulfonylpiperidinylmethylenehydroxide)显示文摘 | Mahir Alkan a Myroslava Kharun Fedor Chmilenko | 2003 | Talanta2003，59，3： | 1 |
| 15 | Limitations of next-generation genome sequence assembly显示文摘 | Alkan C Sajjadian S Eichler EE | 2011 | Nature Methods2011，8，1： | 1 |
| 16 | Does temporary splinting before non-surgical therapy eliminate scaling and root planing-induced trauma to the mobile teeth 显示文摘 | Alkan A Ayka Y | 2001 | J Oral Sci2001，43，4： | 1 |
| 17 | Adsorption of Zinc(II) on diatomite and manganese-oxide-modified diatomite: A kinetic and equilibrium study显示文摘 | Necla Caliskan Ali Riza Kul Salih Alkan Eda Gokirmak Sogut ?hsan Alacabey | 2011 | Journal of Hazardous Materials2011，，： | 1 |
| 18 | Preparation, characterization and thermal properties of PMMA/n-heptadecane microcap- sules as novel solid-liquid microPCM for thermal energy storage 显示文摘 | Sari A Alkan C Karaipekli A | 2010 | Applied Energy2010，87，5： | 1 |
| 19 | Dematologleal manifestations in a tropics]training environment: Emphasis for the general medical officer显示文摘 | Cohen AD WolakA Alkan M | 1994 | Mil Med1994，159，9： | 1 |
| 20 | FTIR and zeta potential measure- ments of sepiolite treated with some organosilanes显示文摘 | ALKAN M TEKIN G NAMLI H | 2005 | Microporous and Mesoporous Materials2005，，84： | 1 |
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