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Classifying rockburst with confidence:A novel conformal prediction approach

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International Journal of Mining Science and Technology 2024年第1期34卷 51-64页

作者： Bemah ibrahim Isaac Ahenkorah University of South Australia UniSA STEMSA 5000Australia

The scientific community recognizes the seriousness of rockbursts and the need for effective mitigation *** literature reports various successful applications of machine learning(ML)models for rockburst assessment;however,a significant question remains unanswered:How reliable are these models,and at what confidence level are classifications made?Typically,ML models output single rockburst grade even in the face of intricate and out-of-distribution samples,without any associated confidence *** the susceptibility of ML models to errors,it becomes imperative to quantify their uncertainty to prevent consequential *** address this issue,we propose a conformal prediction(CP)framework built on traditional ML models(extreme gradient boosting and random forest)to generate valid classifications of rockburst while producing a measure of confidence for its *** proposed framework guarantees marginal coverage and,in most cases,conditional coverage on the test *** CP was evaluated on a rockburst case in the Sanshandao Gold Mine in China,where it achieved high coverage and efficiency at applicable confidence ***,the CP identified several“confident”classifications from the traditional ML model as unreliable,necessitating expert verification for informed *** proposed framework improves the reliability and accuracy of rockburst assessments,with the potential to bolster user confidence.

关键词： Rockburst Machine learning Uncertainty quantification Conformal prediction

Self duality solution with a Higgs field

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Chinese Physics C 2018年第10期42卷 31-37页

作者： ibrahim Sener Seyh Samil Mahallesi 137.Cadde No:19 D:9 P.B.06824 EryamanEtimesgut-AnkaraTurkey

The self-duality concept for the Higgs field is handled in the presence of contact geometry in 5 dimensions. A non-trivial SO（3） Higgs field lives only on the fifth dimension of the contact manifold because of the contact structure, while the SD Yang-Mills field lives in the 4-dimensional hyperplane of the contact manifold. The Higgs and SD Yang-Mills fields do not interact with one another.

关键词： self-duality Higgs field 5 dimensions contact manifold

Power spectral density-based nearinfrared sub-band detection for noninvasive blood glucose prediction in both in-vitro and in-vivo studies

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Journal of Innovative Optical Health Sciences 2018年第6期11卷 43-54页

作者： ibrahim Akkaya Izmir Biomedicine and Genome Center(iBG)Balcova Izmir 35340Turkey Erman Selim Mert Altintas and Mehmet Engin Electrical Electronics Engineering Department Ege UniversityBornovaIzmir 35040Turkey

Diabetes is a widespread and serious disease and noninvasive measurement has been in high *** address this problem,a power spectral density-based method was offered for determining glucose sensitive sub-bands in the nearinfrared(NIR)*** experiments were conducted using phantoms of different optical properties in-vitro *** optical bands 1200–1300 nm and 2100–2200 nm were found feasible for measuring blood *** that,a photoplethysmography(PPG)-based low cost and portable optical system was *** has six di®erent NIR wavelength LEDs for illumination and an InGaAs photodiode for *** density values were calculated through the system and used as independent variables for multiple linear regression *** results of blood glucose levels for 24 known healthy subjects showed that the optical system prediction was nearly 80%in the A zone and 20%in the B zone according to the Clarke Error Grid *** was shown that a promising easyuse,continuous,and compact optical system had been designed.

关键词： Noninvasive blood glucose nearinfrared led photoplethysmography power density

Some(Anti-)Self Duality Solutions on Six Manifolds

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Communications in Theoretical Physics 2016年第10期65卷 379-384页

作者： ibrahim Sener Seyh Samil Mahallesi 137.Cadde No:19 D:9 P.B.06824 EryamanEtimesgut-AnkaraTurkey

The bundle of the 2-forms on 6-manifold decomposes into three subbundles such that Λ~2(R^6) = Λ~2_1⊕Λ~2_6⊕Λ~2_8 with dimensions 1,6 and 8,*** self and anti self duality solutions of the 2-forms,called Φ-duality,are handled and these solutions show that the anti self dual gauge fields live on the subbundles Λ~2_1 and Λ~2_6 while the self ones equations on Λ*** the solution on Λ~2_1 presents a flat *** addition,the curvatures of the connections on Λ~2_6 and Λ~2_8 have Tr[F^3] = 0,and so the topological invariants determined by the Chern classes,*** charge,consist only on the second Chern *** the result of this case,the anti self and self Φ-dual gauge invariant Lagrangians of defined on both subbundles are bounded by the same topological ***,one gives a quantization case to be relating to the instanton number.

关键词： six manifolds (anti-) self duality topological bound quantization

Clustered Hyperbolic Categories

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Algebra Colloquium 2018年第1期25卷 81-106页

作者： ibrahim Saleh Mathematics Department University of Wisconsin 80 Regent Street Madison Wisconsin 53715 USA

We introduce a class of categories, called clustered hyperbolic categories, which are constructed from a categorized version of preseeds called categorical preseeds using categorical mutations that are a ＂functorial＂ edition of preseed mutations. Every Weyl preseed p gives rise to a categorical preseed P which generates a clustered hyperbolic category; this is formed by copies of categories each one of which is equivalent to the category of representations of the Weyl cluster algebra H（p）. A ＂categorical realization＂ of Weyl cluster algebra is provided in the sense of defining a map Fp from any clustered hyperbolic category induced from p to the Weyl cluster algebra H（p）, where the image of Fp generates H（p）.

关键词： cluster algebras Weyl cluster algebras representations theory categorification of generalized Weyl algebras

An efficient nano-adsorbent via surfactants/dual surfactants assisted ultrasonic co-precipitation method for sono-removal of monoazo and diazo anionic dyes

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Chinese Journal of Chemical Engineering 2021年第12期34卷 225-236页

作者： Marwa M.ibrahim Department of Chemistry Faculty of EducationAin Shams UniversityRoxy 11711CairoEgypt

To preserve the environment for civilization,we should remove the pollutants like toxic dyes by friendly and cost efficacious *** this study,the effect of surfactants or mixed surfactants on physicochemical,optical and adsorption properties of ternary mixed oxide CeO_(2)-ZrO_(2)-Al_(2) O_3(CZA) are *** ternary mixed oxide CZA was prepared by surfactants or mixed surfactants assisted ultrasonic coprecipitation *** physicochemical and optical properties are estimated by different techniques like XRD,TEM,EDX,FTIR,S_(BET) and UV-Vis/*** CZA_T and CZA_C have hybrid shapes and high surface *** adsorption properties of ternary mixed oxides adsorbents were characterized by sono-removing anionic dyes such as Congo red(CR) and Remazol red RB-133(RR).The different factors like contact time,different dye concentrations and temperatures also *** kinetics and isotherms applications showed that,the adsorption process was followed pseudo second order kinetics and the Freundlich isotherm ***,the adsorption is spontaneous and endothermic process through the thermodynamic ***,the results showed that the ternary mixed oxide nano-adsorbent(CeO_(2)-ZrO_(2)-Al_(2) O_3) is promising and functional materials for anionic dye sweep from wastewater.

关键词： CeO_(2)-ZrO_(2)-Al_(2)O_3 Surfactants Ultrasonic co-precipitation method Optical properties Wastewater Adsorption

Frequency and voltage-dependent electrical and dielectric properties of Al/Co-doped PVA/p-Si structures at room temperature

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Chinese Physics B 2014年第4期23卷 545-550页

作者： ibrahim Ycedag Ahmet Kaya Semsettin Altindal ibrahim Uslu Department of Computer Engineering Technology Faculty Duzce University Department of Opticianry Vocationel School of Medical Sciences Turgut Ozal University Department of Physics Faculty of Science and Arts Gazi University Department of Chemistry Faculty of Science and Arts Gazi University

In order to investigate of cobalt-doped interracial polyvinyl alcohol （PVA） layer and interface trap （Dit） effects, A1/p- Si Schottky barrier diodes （SBDs） are fabricated, and their electrical and dielectric properties are investigated at room temperature. The forward and reverse admittance measurements are carded out in the frequency and voltage ranges of 30 kHz-300 kHz and -5 V-6 V, respectively. C-V or er-V plots exhibit two distinct peaks corresponding to inversion and accumulation regions. The first peak is attributed to the existence of Dit, the other to the series resistance （Rs）, and interfacial layer. Both the real and imaginary parts of dielectric constant （er and err） and electric modulus （Mr and Mrr）, loss tangent （tan~）, and AC electrical conductivity （aac） are investigated, each as a function of frequency and applied bias voltage. Each of the M~ versus V and Mrr versus V plots shows a peak and the magnitude of peak increases with the increasing of frequency. Especially due to the Dit and interfacial PVA layer, both capacitance （C） and conductance （G/w） values are strongly affected, which consequently contributes to deviation from both the electrical and dielectric properties of A1/Co-doped PVA/p-Si （MPS） type SBD. In addition, the voltage-dependent profile of Dit is obtained from the low-high frequency capacitance （CLF-CHF） method.

关键词： Al/Co-PVA/p-Si (MPS) electrical and dielectric properties AC electrical conductivity frequencyand voltage dependence

Comparison of Impact Properties for Carbon and Low Alloy Steels

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Journal of Materials Science & Technology 2011年第10期27卷 931-936页

作者： O.H.ibrahim Metallurgy Dept. Nuclear Research CentreAtomic Energy Authority

The impact properties of hot rolled carbon steel （used for the manufacture of reinforcement steel bars） and the quenched ＆ tempered （Q＆T） low alloy steel （used in the pressure vessel industry） were determined. The microstructure of the hot rolled carbon steel contained ferrite/pearlite phases, while that of the quenched and tempered low alloy steel contained bainite structure. Impact properties were determined for both steels by instrumented impact testing at temperatures between -150 and 200℃. The impact properties comprised total impact energy, ductile to brittle transition temperature, crack initiation and propagation energy, brittleness transition temperature and cleavage fracture stress. The Q＆T low alloy steel displayed much higher resistance to ductile fracture at high test temperatures, while its resistance to brittle fracture at low test temperatures was a little higher than that of the hot rolled carbon steel. The results were discussed in relation to the difference in the chemical composition and microstructure for the two steels.

关键词： Ferritic/pearlitic steel Bainitic steel Impact properties

Direct Spatially Resolved Snapshot Interferometric Phase and Stokes Vector Extraction by Using an Imaging PolarCam

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Chinese Physics Letters 2020年第7期37卷 19-23页

作者： Dahi ibrahim Daesuk Kim Division of Mechanical System Engineering Chonbuk National UniversityJeonju 54896Korea Engineering and Surface Metrology Lab National Institute of StandardsTersa St.El haramEl GizaEgypt

We extract the 3 D phase△and the Stokes parameter S3 of a transmissive anisotropic object spatially using an interferometric Polar *** parallel interferograms with a phase shift ofπ/2 between the images are captured in a single snapshot and then reconstructed by the four-bucket algorithm to extract the 3 D phase of the *** S3 is then calculated directly from the obtained 3 D phase△.The extracted results of△and S3 were compared with those extracted from the non-interferometric Polar Cam and the Thorlabs polarimeter,and the results match quite *** merit of using the interferometric Polar Cam is that no mechanical movement mechanisms are included,and hence the△and S3 of the object can be extracted,with high accuracy and within a part of a second(three times faster than non-interferometric Polar Cam and Thorlabs polarimeter methods).Moreover,this method can be applied in the field of the dynamic spectro–interferometric Polar Cam and can be implemented using swept-wavelength approaches.

关键词： hence faster spatially