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Band-gap engineering of La1-xNdxAlO3(x = 0,0.25,0.50,0.75,1)perovskite using density functional theory：A modified Becke Johnson potential study

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Chinese Physics B 2016年第6期25卷 376-382页

作者： sandeep d P Rai A shankar m P Ghimire Anup Pradhan sakhya T P sinha R Khenata s Bin Omran R K Thapa department of Physics Mizoram University Aizawl-796004 India department of Physics Pachhunga University College Aizawl-796001 India department of Physics University of North Bengal Darjeeling-734013 India IFW dresden e. V. P. O. Box 270116 D-01171 Dresden Germany department of Physics Bose Institute 93/1 Acharya Prafulla Chandra Road Kolkata 700009 India Laboratoire de Physique Quantique et de modelisation mathematique (LPQ3m) Department de Technologie Universite de Mascara 29000 Mascara Algerie Algeria department of Physics and Astronomy College of Science King Saud University P. O: Box 2455 Riyadh 11451 Saudi Arabia

The structural,electronic,and magnetic properties of the Nd-doped Rare earth aluminate,La1-xNdxAlO3（x = 0%to 100%） alloys are studied using the full potential linearized augmented plane wave（FP-LAPW） method within the density functional *** effects of the Nd substitution in La AlO3 are studied using the supercell *** computed electronic structure with the modified Becke–Johnson（m BJ） potential based approximation indicates that the La1-xNdxAlO3 alloys may possess half-metallic（hm） behaviors when doped with Nd of a finite density of states at the Fermi level（EF）.The direct and indirect band gaps are studied each as a function of x which is the concentration of Nddoped La *** calculated magnetic moments in the La1-xNdxAlO3 alloys are found to arise mainly from the Nd-4f state.A probable half-metallic nature is suggested for each of these systems with supportive integral magnetic moments and highly spin-polarized electronic structures in these doped systems at *** observed decrease of the band gap with the increase in the concentration of Nd doping in La AlO3 is a suitable technique for harnessing useful spintronic and magnetic devices.

关键词： density functional theory rare earth aluminates perovskites electronic structures

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Effect of Heat Treatment on microstructure of modified Cast AIsI d3 Cold Work Tool steel

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Journal of Iron and steel Research International 2010年第9期17卷 40-45,52页

作者： shahram Kheirandish hasan saghafian Jalal Hedjazi mohammad momeni school of metallurgy and materials science Engineering Iran University of Science and Technology Center of Excellence for Advanced materials and Processing Iran University ofScience and Technology

The effects of heat treatment on the microstructure of modified cast high chromium high carbon AIsI d3 steel were studied. The modified AIsI d3 steel was developed by replacing part of chromium with niobium and titanium, in which chromium carbide was partially replaced with mC carbides. The cast samples produced by investment casting were heat treated under different conditions. The microstructures of the samples were studied by optical microscope and scanning electron microscope equipped with Eds analyzer. To determine the optimized homogenizing process, the effects of homogenizing treatment on the microstructure and the morphology of carbides were also studied. The results show that the mC carbides are not changed in shape and amounts during high temperature homogenizing, whereas the m3C carbides are reduced in amount and become semiglobular in shape, and the homogeneity of microstructure is improved.

关键词： d3 cold work tool steel cast Nb Ti microstructure

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modulation of Neurotransmission by a specified Oregano Extract Alters Brain Electrical Potentials Indicative of Antidepressant-Like and Neuroprotective Activities

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Neuroscience & medicine 2012年第1期3卷 37-46页

作者： m. hasan mohajeri Regina Goralczyk Wilfried dimpfel dsm Nutritional Products Ltd. R & D Human Nutrition and Health Basel Switzerland NeuroCode AG Wetzlar Germany

different behavioral states are characterized by distinct patterns of global brain activity. Therefore, the biological effects of herbal extracts on brain functions can be assessed by analyzing the local field potentials, the so-called electropharmacogram analysis. Inspired by our recent findings that a specified oregano extract (OE) exhibited a triple-reuptake activity in vitro, this extract was tested in model of Tele-stereo-electroencephalogram (EEG) to elucidate how OE affects the electrical brain activity in freely moving rats. Furthermore, discriminant analysis was performed to compare the electric brain activity of four standardized brain regions with those produced by several reference compounds, representing a whole variety of clinical indications. Oral intake of OE produced fast and robust dose and time dependent EEG alterations consisting of significant changes of spectral power in comparison to controls. strongest effects were seen with respect to alpha1, alpha2 and beta1 waves representing an activation of serotonergic, dopaminergic and glutamatergic neurotransmission, respectively. moreover, the discriminant analysis revealed that OE’s pattern of activity locates in close vicinity to antidepressant and neuroprotective compound. The presented data support the hypothesis suggesting the use of OE as a neuroprotective dietary supplement to promote mood, motivation and mental wellbeing.

关键词： EEG dopamine serotonin Noradrenalin OréVida diet mood Therapy

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Wafer map defect patterns classification based on a lightweight network and data augmentation

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CAAI Transactions on Intelligence Technology 2023年第3期8卷 1029-1042页

作者： Naigong Yu Huaisheng Chen Qiao Xu mohammad mehedi hasan Ouattara sie Faculty of Information Technology Beijing University of TechnologyBeijingChina Beijing Key Laboratory of Computational Intelligence and Intelligent system BeijingChina Engineering Research Center of digital Community Ministry of EducationBeijingChina College of Robotic UniversitéFélix Houphouët‐BoignyAbidjanCôte d'Ivoire

Accurately identifying defect patterns in wafer maps can help engineers find abnormal failure factors in production *** the wafer testing stage,deep learning methods are widely used in wafer defect detection due to their powerful feature extraction ***,most of the current wafer defect patterns classification models have high complexity and slow detection speed,which are difficult to apply in the actual wafer production *** addition,there is a data imbalance in the wafer dataset that seriously affects the training results of the *** reduce the complexity of the deep model without affecting the wafer feature expression,this paper adjusts the structure of the dense block in the PeleeNet network and proposes a lightweight network Wm‐PeleeNet based on the PeleeNet *** addition,to reduce the impact of data imbalance on model training,this paper proposes a wafer data augmentation method based on a convolutional autoencoder by adding random Gaussian noise to the hidden *** method proposed in this paper has an average accuracy of 95.4%on the Wm‐811K wafer dataset with only 173.643 KB of the parameters and 316.194 m of FLOPs,and takes only 22.99 s to detect 1000 wafer *** with the original PeleeNet network without optimization,the number of parameters and FLOPs are reduced by 92.68%and 58.85%,*** augmentation on the minority class wafer map improves the average classification accuracy by 1.8%on the Wm‐811K *** the same time,the recognition accuracy of minority classes such as scratch pattern and donut pattern are significantly improved.

关键词： convolutional autoencoder lightweight network wafer defect detection

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Nutrient dynamics associated with leaf litter decomposition of three agroforestry tree species (Azadirachta indica, dalbergia sissoo, and melia azedarach) of Bangladesh

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Journal of Forestry Research 2011年第4期22卷 577-582页

作者： mahmood Hossain mohammad Raqibul hasan siddique md. saidur Rahman md. Zaber Hossain md. mahedi hasan Forestry and Wood Technology discipline Khulna University Khulna - 9208 Bangladesh soil science discipline Khulna University Khulna-9208 Forestry and Wood Technology discipline Khulna University Khulna- 9208

Azadirachta indica A. Juss, dalbergia, sissoo Roxb., and melia azedarach L. are little studied species in nutrient return capabilities from leaf litter decomposition to maintenance of the soil fertility despite their importance in agroforestry practices of Bangladesh. A leaf litter decomposition experiment was conducted using a litterbag teeh7 nique to assess the nutrient reaun efficiency of these species. The de- composition rate of leaf litter was highest for m. azedarach and lowest for d. sissoo. Rainfall and temperature of study sites showed a significant （p〈0.05） positive relationship with the rate of leaf litter decomposition. The highest decay constant was observed for m. azedarach （6.67）. Nitrogen and Phosphorus concentration in leaf litter showed a decreased trend sharply at the end of the first month, whereas rapid decrease of Potassium concentration was reported within 10 days. Conversely, higher concentration of nutrient was observed at the later stages of decomposition. All three species showed a similar pattern of nutrient release （K 〉 N 〉 P） during the decomposition process of leaf litter. Among the studied species, d. sissoo was best in terms of N and P return and A. indica was best in terms of K return.

关键词： agroforestry decay constant decomposition leaf litter andnutrient dynamics

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运用大数据技术提高油藏管理水平——大数据技术将有助于开展数据的诊断和预测，提高管理效果，迅速应对不断变化的行业情况

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世界石油工业 2015年第4期22卷 50-53页

作者： d. seemann m. Williamson s. hasan 沙特阿美石油公司

石油工业不仅受制于内部决策，还受制于来自外部组织机构甚至行业以外的许多因素，如市场规律、气候、交通、技术和油服公司等。由于这些因素对油藏管理都存在巨大影响，因此需要采用数据驱动的决策过程，做出最科学、有益的决定。大数... 详细信息

石油工业不仅受制于内部决策，还受制于来自外部组织机构甚至行业以外的许多因素，如市场规律、气候、交通、技术和油服公司等。由于这些因素对油藏管理都存在巨大影响，因此需要采用数据驱动的决策过程，做出最科学、有益的决定。大数据的作用主要体现在处理数据过载，进行管理预测和跟踪，开展聚类、数据挖掘和自动递减曲线分析：在制定钻井计划、确定最佳现场实践、关键绩效指标以及数据完整性和数据集成方面有较好的应用前景。大数据应用的成功与否取决于强大的管理战略联盟体系。大数据的成功应用可以实现数据的精确划分，使不同部门及工程师获取相应的有效分析结果。

关键词：石油工业大数据作用应用前景

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Acute ischaemic stroke interventions: large vessel occlusion and beyond

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stroke & Vascular Neurology 2020年第1期5卷 80-85页

作者： Ahmad sweid Batoul Hammoud sunidhi Ramesh daniella Wong Tyler d Alexander Joshua Harrison Weinberg maureen deprince Jaime dougherty dimitri Jean-mickael maamari stavropoula Tjoumakaris Hekmat Zarzour michael R Gooch Nabeel Herial Victor Romo david m hasan Robert H Rosenwasser Pascal Jabbour Neurosurgery Thomas Jefferson University HospitalPhiladelphiaPennsylvaniaUSA Endocrinology Children’s Hospital of PhiladelphiaPhiladelphiaPennsylvaniaUSA sydney Kimmel medical College Thomas Jefferson UniversityPhiladelphiaPennsylvaniaUSA school of medicine American University of BeirutBeirutLebanon Anesthesia Thomas Jefferson University-Center City CampusPhiladelphiaPennsylvaniaUSA Neurosurgery University of Iowa Hospitals and ClinicsIowa CityIowaUSA

Care for acute ischaemic stroke is one of the most rapidly evolving fields due to the robust outcomes achieved by mechanical *** vessel occlusion(LVO)accounts for up to 38%of acute ischaemic stroke and comes with devastating outcomes for patients,families and society in the pre-intervention era.A paradigm shift and a breakthrough brought mechanical thrombectomy back into the spotlight for acute ischaemic stroke;this was because five randomised controlled trials from several countries concluded that mechanical thrombectomy for acute stroke offered overwhelming *** review article will present a comprehensive overview of LVO management,techniques and devices used,and the future of stroke *** addition,we review our institution experience of mechanical thrombectomy for posterior and distal circulation occlusion.

关键词： acute occlusion breakthrough

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development and Evaluation of species-specific Biomass models for most Common Timber and Fuelwood species of Bangladesh

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Open Journal of Forestry 2020年第1期10卷 172-185页

作者： mahmood Hossain mohammad Raqibul hasan siddique s. m. Rubaiot Abdullah Chameli saha s. m. Zahirul Islam md. Zaheer Iqbal mariam Akhter Forestry and Wood Technology discipline Khulna University Khulna Bangladesh Forest Inventory division Bangladesh Forest Research Institute Chittagong Bangladesh deputy Conservator of Forests Bangladesh Forest Department Dhaka Bangladesh Bangladesh Forest department Assistant Conservator of Forest Bangladesh Forest Department Dhaka Bangladesh

Allometric biomass models are efficient tools to estimate biomass of trees and forest stands in a non-destructive way. development of species-specific allometric biomass models requires extensive fieldwork and time. Our study aimed to generate species-specific allometric biomass models for the most common fuelwood and timber species of Bangladesh. We also wanted to evaluate the performances of our models relative to the performances of regional and commonly used pan-tropical biomass models. We used semi-destructive method that incorporates tree-level volume, species-specific biomass expansion factor (BEF), and wood density. We considered four base models, 1) Ln (biomass) = a + bLn (d);2) Ln (biomass) = a + bLn (H);3) Ln (Biomass) = a + bLn (d^2H);4) Ln (Biomass) = a + bLn (d) + cLn (H) to develop species-specific best-fitted models for Total Above-Ground Biomass (TAGB) and stem biomass. The best-fitted model for each species was selected by the lowest value of Akaike Information Criterion (AIC), Residual standard Error (RsE) and Root mean square Error (RmsE). The derived best-fitted models were then evaluated with respect to regional and pan-tropical models using a separate set of observed data. This evaluation was conducted by computing mE (model Efficiency) and mPE (model Prediction Error). The best-fitted allometric biomass models have shown higher model efficiency (0.85 to 0.99 at scale 1) and the lowest model prediction error (-8.94% to 5.27%) compared to the regional and pan-tropical models. All the examined regional and pan-tropical biomass models showed different magnitude of mE and mPE. some models showed higher level (>0.90 at scale 1) of mE compared to the best-fitted specific species biomass model.

关键词： Allometry Bangladesh Biomass Fuelwood Timber Pan-Tropical model Regional Common model

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destructive and non-destructive evaluation of concrete for optimum sand to aggregate volume ratio

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Frontiers of structural and Civil Engineering 2021年第6期15卷 1400-1414页

作者： Tarek Uddin mOHAmmEd Aziz hasan mAhmOOd mohammad Zunaied-Bin-HARUN Jamil Ahmed JOY mdAsif AhmEd department of Civil and Environmental Engineering Islamic University of Technology(IUT)Organization of Islamic Cooperation(OIC)Board BazarGazipur 1704Bangladesh Centre for Infrastructure Engineering and safety School of Civil and Environmental EngineeringThe University of New South WalesSydneyNSW 2052Australia department of Civil Engineering European University of BangladeshMirpurDhaka 1216Bangladesh

Aggregates are the biggest contributor to concrete volume and are a crucial parameter in dictating its mechanical *** such,a detailed experimental investigation was carried out to evaluate the effect of sand-toaggregate volume ratio(s/a)on the mechanical properties of concrete utilizing both destructive and non-destructive testing(employing UPV(ultrasonic pulse velocity)measurements).For investigation,standard cylindrical concrete samples were made with different s/a(0.36,0.40,0.44,0.48,0.52,and 0.56),cement content(340 and 450 kg/m^(3)),water-to-cement ratio(0.45 and 0.50),and maximum aggregate size(12 and 19 mm).The effect of these design parameters on the 7,14,and 28 d compressive strength,tensile strength,elastic modulus,and UPV of concrete were *** careful analysis demonstrates that aggregate proportions and size need to be optimized for formulating mix designs;optimum ratios of s/a were found to be 0.40 and 0.44 for the maximum aggregate size of 12 and 19 mm,respectively,irrespective of the W/C(water-to-cement)and cement content.

关键词： aggregates non-destructive testing sand-to-aggregate volume ratio(s/a) maximum aggregate size(mAs)

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simulating long-term effect of Hyrcanian forest loss on phosphorus loading at the sub-watershed level

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Journal of Arid Land 2018年第3期10卷 457-469页

作者： Fatemeh RAJAEI Abbas E sARI Abdolrassoul sALmANmAHINY Timothy O RANdHIR majid dELAVAR Reza d BEHROOZ Alireza m BAVANI department of Environment Faculty of Natural Resources and Marine Science Tarbiat Modares University department of Environmental Gorgan University of Agricultural Science & Natural Resources department of Environmental Conservation University of Massachusetts department of Water Resources Agriculture Faculty Tarbiat Modares University department of Environmental sciences Faculty of Natural Resources University of Zabol department of Irrigation and drainage Engineering Faculty of Abouraihan University of Tehran

Conversion of forest land to farmland in the Hyrcanian forest of northern Iran increases the nutrient input, especially the phosphorus（P） nutrient, thus impacting the water quality. modeling the effect of forest loss on surface water quality provides valuable information for forest management. This study predicts the future impacts of forest loss between 2010 and 2040 on P loading in the Tajan River watershed at the sub-watershed level. To understand drivers of the land cover, we used Land Change modeler（LCm） combining with the soil Water Assessment Tool（sWAT） model to simulate the impacts of land use change on P loading. We characterized priority management areas for locating comprehensive and cost-effective management practices at the sub-watershed level. Results show that agricultural expansion has led to an intense deforestation. during the future period 2010–2040, forest area is expected to decrease by 34,739 hm^2. And the areas of pasture and agriculture are expected to increase by 7668 and 27,071 hm^2, respectively. In most sub-watersheds, P pollution will be intensified with the increase in deforestation by the year 2040. And the P concentration is expected to increase from 0.08 to 2.30 mg/L in all of sub-watersheds by the year 2040. It should be noted that the phosphorous concentration exceeds the American Public Health Association′s water quality standard of 0.2 mg/L for P in drinking water in both current and future scenarios in the Tajan River watershed. Only 30% of sub-watersheds will comply with the water quality standards by the year 2040. The finding of the present study highlights the importance of conserving forest area to maintain a stable water quality.

关键词： phosphorus land use change modeling forest loss prioritizing management area Tajan River Iran

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