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Applications of Engineering Seismology for Site Characterization

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Journal of China university of Geosciences 2009年第3期20卷 546-554页

作者： Oz yilmaz Murat Eser Mehmet Berilgen Anatolian Geophysical 28 Lalebayiri Kemer Country KemerburgazIstanbul 34077 Turkey Yildiz Technical university Istanbul Turkey

We determined the seismic model of the soil column within a residential project site in Istanbul, Turkey. Specifically, we conducted a refraction seismic survey at 20 locations using a receiver spread with 484.5-Hz vertical geophones at 2-m intervals. We applied nonlinear tomography to first-arrival times to estimate the P-wave velocity-depth profiles and performed Rayleigh-wave inversion to estimate the S-wave velocity-depth profiles down to a depth of 30 m at each of the locations. We then combined the seismic velocities with the geotechnical borehole information regarding the lithology of the soil column and determined the site-specific geotechnical earthquake engineering parameters for the site. Specifically, we computed the maximum soil amplification ratio, maximum surface-bedrock acceleration ratio, depth interval of significant acceleration, maximum soil-rock response ratio, and design spectrum periods TA-TB. We conducted reflection seismic surveys along five line traverses with lengths between 150 and 300 m and delineated landslide failure surfaces within the site. We recorded shot gathers at 2-m intervals along each of the seismic line traverses using a receiver spread with 4 840-Hz vertical geophones at 2-m intervals. We applied nonlinear tomography to first-arrival times to estimate a P-wave velocity-depth model and analyzed the reflected waves to obtain a seismic image of the deep near-surface along each of the line traverses.

关键词： engineering seismology geotechnical engineering earthquake engineering shear-wave velocity.

Comparative Evaluation of Machine Learning Models and Input Feature Space for Non-intrusive Load Monitoring

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Journal of Modern Power Systems and Clean Energy 2021年第5期9卷 1161-1171页

作者： Attique ur Rehman Tek Tjing Lie Brice Valles Shafiqur Rahman Tito Department of Electrical and Electronic Engineering Auckland University of TechnologyAucklandNew Zealand Brice Valles Consulting AucklandNew Zealand School of Engineering and Trades Manukau Institute of TechnologyAucklandNew Zealand

Recent advancement in computational capabilities has accelerated the research and development of non-intrusive load ***-intrusive load monitoring(NILM)offers many promising applications in the context of energy efficiency and *** classification is a key component of NILM that relies on different artificial intelligence techniques,e.g.,machine *** study employs different machine learning models for load classification and presents a comprehensive performance evaluation of the employed models along with their comparative ***,this study also analyzes the role of input feature space dimensionality in the context of classification *** the above purposes,an event-based NILM methodology is presented and comprehensive digital simulation studies are carried out on a low sampling real-world electricity load acquired from four different *** on the presented analysis,it is concluded that the presented methodology yields promising results and the employed machine learning models generalize well for the invisible diverse testing *** multi-layer perceptron learning model based on the neural network approach emerges as the most promising ***,it is also noted that it significantly facilitates the classification performance by reducing the input feature space dimensionality.

关键词： Machine learning model load feature non-intrusive load monitoring(NILM) comparative evaluation

THREE POINT BOuNDARY VALuE PROBLEMS FOR NONLINEAR FRACTIONAL DIFFERENTIAL EQuATIONS

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Acta Mathematica Scientia 2011年第4期31卷 1337-1346页

作者： Mujeeb ur Rehman Rahmat Ali Khan Naseer Ahmad Asif National university of Sciences and Technology (NuST) Centre for Advanced Mathematics and Physics university of Malakand Chakdara Dir(L) Khyber Pakhtunkhawa Pakistan

In this paper, we study existence and uniqueness of solutions to nonlinear three point boundary value problems for fractional differential equation of the type c D δ 0＋ u（t） = f （t, u（t）, c D σ 0＋ u（t））, t ∈ [0, T ], u（0） = αu（η）, u（T ） = βu（η）, where 1 〈 δ 〈 2, 0 〈 σ 〈 1, α, β∈ R, η∈ （0, T ）, αη（1 -β）＋（1-α）（T βη） = 0 and c D δ 0＋ , c D σ 0＋ are the Caputo fractional derivatives. We use Schauder fixed point theorem and contraction mapping principle to obtain existence and uniqueness results. Examples are also included to show the applicability of our results.

关键词： fractional differential equations three point boundary conditions existence and uniqueness results

Disorganization of the retinal inner layers as a prognostic factor in eyes with central retinal artery occlusion

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International Journal of Ophthalmology(English edition) 2019年第6期12卷 990-995页

作者： Hayati yilmaz Ali H.Durukan Department of Ophthalmology Mengucek Gazi Training and Research HospitalErzincan 24000Turkey Department of Ophthalmology Gulhane Medical FacultyAnkara 06010Turkey

AIM: To evaluate baseline foveal disorganisation of retinal inner layers(DRIL) as a prognostic factor in eyes with central retinal artery occlusion(CRAO). METHODS: Twenty-eight CRAO patients who were followed-up between 2010 and 2016 were retrospectively investigated. Demographic characteristics and detailed ophthalmological examination findings of all patients were recorded. Macular thicknesses(MTs) from 5 separate spots and DRIL were measured with spectral-domain optic coherence tomography(SD-OCT). Correlations between DRIL score and logMAR converted visual acuity(VA), change in VA, patient reference time(RT), number of hyperbaric oxygen therapy(HBOT) sessions, MT and MT change were ***: There was a positive correlation between the DRIL score and the final VA(r=0.787) and a negative correlation with the change in VA(r=-0.763). The RT and MT were closely related to the DRIL score. A negative correlation was found between the number of HBOT sessions and the DRIL score(r=-0.341).CONCLuSION: The DRIL score is a parameter assessed by SD-OCT, which can provide us reliable information regarding the prognosis of visual functions and response to the treatment for CRAO patients at acute phase.

关键词： central retinal artery occlusion disorganisation inner retina spectral-domain optic coherence tomography prognosis

Hydrophobic modification of SAPO-34 membranes for improvement of stability under wet condition

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Chinese Journal of Chemical Engineering 2019年第10期27卷 2397-2406页

作者： Rashid ur Rehman Qingnan Song Li Peng Yang Chen Xuehong Gu State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringJiangsu National Synergetic Innovation Center for Advanced MaterialsNanjing Tech UniversityNanjing 210009China

SAPO-34 zeolite membranes show high efficiency for CO2/CH4 separation but suffer from the reduction of separation performance when exposed to humid *** this work,n-dodecyltrimethoxysilane(DTMS)was used to modify the hollow fibers supported SAPO-34 membranes to increase the external surface hydrophobicity and thus sustain their performance under moisture *** modified membranes were fully *** separation performance was extensively investigated in both dry and wet gaseous systems and compared with the un-modified *** un-modified SAPO-34 membrane exhibited a high separation selectivity of 160 and CO2 permeance of 1.18×10-6 mol·m-2·s-1·Pa-1 for separation of dry CO2/CH4 at 298 ***,its separation selectivity declined to 0.9 and the CO2 permeance was only about 1.7×10-8 mol·m-2·s-1·Pa-1 for wet CO2/CH4 at same *** temperature(e.g.353 K)could reduce the effect of moisture to improve SAPO-34 separation selectivity,but further increasing temperature(e.g.373 K)led to decrease in CO2/CH4 separation selectivity.A significant decrease of selectivity was observed at higher pressure *** modified SAPO-34 membrane showed decreased CO2 permeance but increased separation selectivity for dry CO2/CH4 gas mixture,and super performance for wet CO2/CH4 gas mixture due to the improved hydrophobicity of membrane surface.A separation selectivity of 65 and CO2 permeance of 4.73×10-8 mol·m-2·s-1·Pa-1 for wet CO2/CH4 mixture can be observed at 353 K with a pressure drop of 0.4 ***,the modified membrane exhibited stable separation performance during the 120-hour test for wet CO2/CH4 mixture at 353 *** hydrophobic modification paves a way for SAPO-34 membranes in real applications.

关键词： SAPO-34 membrane CO2/CH4 separation Hydrophobic modification Stability Moisture environment

Non-Invasive Early Diagnosis of Obstructive Lung Diseases Leveraging Machine Learning Algorithms

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Computers, Materials & Continua 2022年第9期72卷 5681-5697页

作者： Mujeeb ur Rehman Maha Driss Abdukodir Khakimov Sohail Khalid Department of Electrical Engineering Riphah International UniversityIslamabad44000Pakistan Security Engineering Lab Prince Sultan UniversityRiyadh12435Saudi Arabia RIADI Laboratory National School of Computer ScienceUniversity of ManoubaManouba2010Tunisia Peoples’Friendship university of Russia(RuDN university) Moscow117198Russia

Lungs are a vital human body organ,and different Obstructive Lung Diseases(OLD)such as asthma,bronchitis,or lung cancer are caused by shortcomings within the ***,early diagnosis of OLD is crucial for such patients suffering from OLD since,after early diagnosis,breathing exercises and medical precautions can effectively improve their health state.A secure non-invasive early diagnosis of OLD is a primordial need,and in this context,digital image processing supported by Artificial Intelligence(AI)techniques is reliable and widely used in the medical field,especially for improving early disease ***,this article presents an AIbased non-invasive and secured diagnosis for OLD using physiological and iris *** research work implements different machine-learning-based techniques which classify various subjects,which are healthy and effective *** iris features include gray-level run-length matrix-based features,gray-level co-occurrence matrix,and statistical *** features are extracted from iris ***,ten different classifiers and voting techniques,including hard and soft voting,are implemented and tested,and their performances are evaluated using several parameters,which are precision,accuracy,specificity,F-score,and *** on the statistical analysis,it is concluded that the proposed approach offers promising techniques for the non-invasive early diagnosis of OLD with an accuracy of 97.6%.

关键词： Obstructive lung disease non-invasive diagnosis machine learning physiological features voting techniques

Characteristics of pulsed photo-stimulated luminescence and thermoluminescence for the identification of gamma irradiated poultry eggs

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Nuclear Science and Techniques 2007年第1期18卷 20-25页

作者： Ijaz A.BHATTI Jong-Ho KWON Salim ur-REHMAN Department of Chemistry University of AgricultureFaisalabadPakistan Department of Food Science & Technology Kyungpook National University702-701DaeguSouth Korea Institute of Food Science & Technology University of AgricultureFaisalabadPakistan

Pulsed photo-stimulated luminescence (PPSL) is a simple screening method that can be employed qualitatively at the spot for the detection of eggs treated with ionizing *** to the variations in the results during storage,the eggs of ostrich,duck,hen,and quail were irradiated to doses of 0,1,2,and 3 *** of the samples were incorrectly identified during storage after four months of *** (TL) technique was also tried by using egg shells in order to confirm the irradiation treatment in *** glow curves were recorded between the temperatures 50℃to 400℃at the rate of 5°/s for all the control and irradiated *** the basis of integrated areas of first glow curves (TL1),the glow curve ratios (TL1/TL2) and the shapes of maxima of TL1, the irradiation treatment of all the eggs was ***,the presence of calcite and aragonite minerals that cause the TL signal in the egg shells were studied using X-ray diffraction spectrometry.

关键词：禽蛋鸡蛋 γ射线脉冲光刺激发光热致发光辐射保鲜

Analysis of TOPSIS techniques based on bipolar complex fuzzy N-soft setting and their applications in decision-making problems

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CAAI Transactions on Intelligence Technology 2023年第2期8卷 478-499页

作者： Tahir Mahmood ubaid ur Rehman Zeeshan Ali Izatmand Haleemzai Department of Mathematics and Statistics International Islamic University IslamabadIslamabadPakistan Department of Higher Mathematics Polytechnical University KabulKabulAfghanistan

A novel model termed a bipolar complex fuzzy N-soft set(BCFN-SS)is initiated for tackling information that involves positive and negative aspects,the second dimension,and parameterised grading *** theory of BCFN-SS is the generalisation of two various theories,that is,bipolar complex fuzzy(BCF)and *** invented model of BCFN-SS helps decision-makers to cope with the genuine-life dilemmas containing BCF information along with parameterised grading at the same ***,various algebraic operations,including the usual type of union,intersection,complements,and a few others types,are *** primary operational laws for BCFNSS are also ***,a technique for order preference by similarity to the ideal solution(TOPSIS)approach is devised in the setting of BCFN-SS for managing strategic decision-making(DM)dilemmas containing BCFN-SS *** in mind the usefulness and benefits of the TOPSIS approach,two various types of TOPSIS approaches in the environment of BCFN-SS are devised and then a numerical example for exposing the usefulness of the devised TOPSIS approach is *** disclose the prominence and benefits of the devised work,the devised approaches with numerous prevailing work are compared.

关键词： aggregation operators bipolar complex fuzzy N-soft sets decision-making similarity measures TOPSIS techniques

Export Dependence and Sustainability of Growth in China

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China & World Economy 2011年第1期19卷 1-23页

作者： yilmaz Akyüz Division on Globalization and Development Strategies UNCTADGenevaSwitzerland

This paper examines the contribution of exports to growth in China since the early years of the decade. It is estimated that, despite a high import content ranging between 40 and 50 percent, approximately one-third of Chinese growth before the global crisis was a result of exports, due to their phenomenal growth of some 25 percent per annum. This figure increases to 50percent if spillovers to consumption and investment are allowed for. The main reason for excessive dependence on foreign markets is underconsumption. This is due not so much to a high share of household savings in GDP as to a low share of household income and a high share of profits. It is argued that China can no longer maintain such high growth rates for its exports, and, therefore, needs to turn to consumption-led growth by expanding the share of wages and household income in GDP and accelerating public spending in social infrastructure.

关键词： China consumption-led growth export dependence income distribution trade and growth