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SmokerViT: A Transf.rmer-Based Method f.r Smoker Recognition

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Computers, Materials & Continua 2023年第10期77卷 403-424页

作者： Ali khan Somaiya khan Bilal Hassan Rizwan khan Zhonglong Zheng College of.Mathematics and Computer Science Zhejiang Normal UniversityJinhua321004China School of.Electronics Engineering Beijing University of Posts and TelecommunicationsBeijing100876China Department of.Electrical Engineering and Computer Science Khalifa University of Science and TechnologyAbu Dhabi127788United Arab Emirates Key Laboratory of.Intelligent Education of.Zhejiang Province Zhejiang Normal UniversityJinhua321004China

Smoking has an economic and environmental impact on society due to the toxic substances it *** Neural Networks(CNNs)need help describing low-level f.atures and can miss important ***,accurate smoker detection is vital with minimum f.lse *** answer the issue,the researchers of.this paper have turned to a self.attention mechanism inspired by the ViT,which has displayed state-of.the-art perf.rmance in the classif.cation *** ef.ectively enf.rce the smoking prohibition in non-smoking locations,this work presents a Vision Transf.rmer-inspired model called SmokerViT f.r detecting ***,this research utilizes a locally curated dataset of.1120 images evenly distributed among the two classes(Smoking and NotSmoking).f.rther,this research perf.rms augmentations on the smoker detection dataset to have many images with various representations to overcome the dataset size *** convolutional operations used in most existing works,the proposed SmokerViT model employs a self.attention mechanism in the Transf.rmer block,making it suitable f.r the smoker classif.cation ***,this work integrates the multi-layer perceptron head block in the SmokerViT model,which contains dense layers with rectif.ed linear activation and linear kernel regularizer with L2 f.r the recognition *** work presents an exhaustive analysis to prove the ef.iciency of.the proposed SmokerViT *** perf.rmance of.the proposed SmokerViT perf.rmance is evaluated and compared with the existing methods,where it achieves an overall classif.cation accuracy of.97.77%,with 98.21%recall and 97.35%precision,outperf.rming the state-of.the-art deep learning models,including convolutional neural networks(CNNs)and other vision transf.rmer-based models.

关键词： Smoker recognition SmokerViT deep learning transf.rmer f.r vision

Variation in growth potential between hybrid clones of.Eucalyptus trees in eastern South Af.ica

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Journal of.f.restry Research 2017年第6期28卷 1154-1164页

作者： Sileshi f. Melesse Temesgen Zewotir School of.Mathematics Statistics and Computer ScienceUniversity of KwaZulu-Natal Pietermaritzburg South Africa

Growth of.commercial f.restry is highly dependent on the availability of.f.st-growing planting materials. Consequently, the ef.icient utilization of.f.stgrowing plantations can greatly impact productivity. The objectives of.this study were to evaluate variations in the growth potential of.two clones and to estimate the average stem radial growth advantage of.a f.st-growing clone using data obtained f.om Sappi landholdings in eastern South Af.ica and a mixed modelling approach that permits the incorporation of.covariance structure into the statistical model. During the f.rst 2 years of.growth, the stem radius of.nine trees each of.two clones was measured using dendrometer attached to the tree. A second-degree f.actional polynomial model was chosen to show the f.nctional relationship between stem radius and tree age. Growth of.the two hybrid clones dif.ered signif.cantly. The Eucalyptus grandis×Eucalyptus urophylla clone grew f.ster than the E. grandis×camaldulensis clone, indicating better genetic potential f.r rapid growth and yield. This study can be considered as starting point to f.rther compare the potential f.r rapid growth of.several hybrid clones using the longitudinal data modelling approach.

关键词： Covariance f.nction Dendrometer trial Growth rate Loess Longitudinal study Random slope

Soil Properties in Conif.rous f.rest Stands Along a f.y Ash Deposition Gradient in Eastern Germany

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Pedosphere 2005年第6期15卷 681-694页

作者： S. KLOSE f. MAKESCHIN Institute of.Soil Science Faculty of Forest Geo and Hydro Sciences Dresden University of Technology P.O. 1117 D-01735 Tharandt (Germany)

Physical, chemical, and microbial properties of.f.rest soils subjected to long-term f.y ash depositions were analyzed in spruce (Picea abies (L.) Karst.) stands of.eastern Germany on three f.rest sites along an emission gradient of.3 (high input), 6, and 15 km (low input) downwind of.a coal-f.red power plant. Past emissions resulted in an atypical high mass of.mineral f.y ash constituents in the organic horizons at the high input site of.128 t ha-1 compared to 58 t ha-1 at the low input site. Magnetic susceptibility measurements proved that the high mineral content of.the f.rest f.oor was a result of.f.y ash accumulation in these f.rest stands. f.y ash deposition in the organic horizons at Site I versus III signif.cantly increased the pH values, ef.ective cation exchange capacity, base saturation and, with exception of.the L horizon, concentrations of.mobile heavy metals Cd, Cr, and Ni, while stocks of.organic C generally decreased. A principal component analysis showed that organic C content and base status mainly controlled soil microbial biomass and microbial respiration rates at these sites, while pH and mobile f.actions of.Cd, Cr, and Ni governed enzyme activities. Additionally, it was hypothesized that long-term f.y ash emissions would eventually destabilize f.rest ecosystems. Theref.re, the results of.this study could become a usef.l tool f.r risk assessment in f.rest ecosystems that were subjected to past emissions f.om coal-f.red power plants.

关键词： conif.rous f.rests f.y ash deposition magnetic susceptibility microbial biomass mobile heavy metal f.action

Isometry Groups of.Some Dunwoody Manif.lds

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Algebra Colloquium 2016年第1期23卷 117-128页

作者： f. Spaggiari A.I. Telloni Dipartimento di Matematica Universit& di Modena e Reggio E. Via Campi 213/B 41100 Modena Italy

Dunwoody manif.lds are an interesting class of.closed connected orientable 3-manif.lds, which are def.ned by means of.Heegaard diagrams having a rotational symmetry. They are proved to be cyclic coverings of.lens spaces （possibly S3） branched over （1, 1）-knots. Here we study the Dunwoody manif.lds which are cyclic coverings of.the 3-sphere branched over two specif.ed f.milies of.Montesinos knots. Then we determine the Dunwoody parameters f.r such knots and the isometry groups f.r the considered manif.lds in the hyperbolic case. A list of.volumes f.r some hyperbolic Dunwoody manif.lds completes the paper.

关键词： Dunwoody manif.ld Montesinos knot branched covering isometry group

Teichmller space of.negatively curved metrics on complex hyperbolic manif.lds is not contractible

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Science China Mathematics 2017年第4期60卷 569-580页

作者： f.RRELL f. Thomas SORCAR Gangotryi Yau Mathematical Sciences Center and Department of.Mathematical Sciences Tsinghua University Beijing 100084 China Department of.Mathematics Ohio State University Columbus OH 43210 USA

We prove that f.r all n = 4k- 2 and k 2 there exists a closed smooth complex hyperbolic manif.ld M with real dimension n having non-trivial π1(T<0(M)). T<0(M) denotes the Teichm¨uller space of.all negatively curved ... 详细信息

We prove that f.r all n = 4k- 2 and k 2 there exists a closed smooth complex hyperbolic manif.ld M with real dimension n having non-trivial π1(Tf.all negatively curved Riemannian metrics on M, which is the topological quotient of.the space of.all negatively curved metrics modulo the space of.self.dif.eomorphisms of.M that are homotopic to the identity.

关键词： space of.Riemannian metrics negative curvature complex hyperbolic space

THEORY Of.BAINITIC TRANSf.RMATION: A MODEL WITH COUPLED f.RST-ORDER PHASE TRANSf.RMATIONS

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Acta Metallurgica Sinica(English Letters) 2000年第3期13卷 901-910页

作者： Liu, X. Zhong, f. Baoshan Iron and Steel Corp Shanghai China

The Ginzbury-Landau theory f.r bainitic transf.rmation was devised, which contains two f.rst-order phase transf.rmations, one being reconstructive represented by the dif.usional proeutectoidal precipitation of.f.rrite, and the other the displacive transf.rmation. It provides a coupled mechanism f.r the f.rmation of.bainite. With the numerical simulation results, a dif.usion-induced nucleation and a dif.usion-accompanied growth of.displacive transf.rmation were suggested. This theory can be helpf.l to over- throw the thermodynamic dif.iculty of.displacive transf.rmation above the Ms temperature, and also helpf.l to understand the Bs temperature, the partial supersaturation, the single variation of.bainitic carbides, and the incomplete-reaction phenomenon of.bainitic transf.rmation, etc..

关键词： Bainitic transf.rmations Computer simulation Crystalline materials f.nite dif.erence method Metallographic phases Nucleation Phase transitions Steel metallurgy Thermodynamics

Pico–nano bubble column f.otation using static mixer-venturi tube f.r Pittsburgh No.8 coal seam

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International Journal of.Mining Science and Technology 2015年第3期25卷 347-354页

作者： Peng f.licia f. Yu Xiong The Department of.Mining Engineering West Virginia University

The f.otation process is a particle-hydrophobic surf.ce-based separation technique. To improve the essential f.otation steps of.collision and attachment probabilities, and reduce the step of.detachment probabilities between air bubbles and hydrophobic particles, a selectively designed cavitation venturi tube combined with a static mixer can be used to generate very high numbers of.pico and nano bubbles in a f.otation column. f.lly embraced by those high numbers of.tiny bubbles, hydrophobic particles readily attract the tiny bubbles to their surf.ces. The results of.column f.otation of.Pittsburgh No. 8 seam coal are obtained in a 5.08 cm ID and 162 cm height f.otation column equipped with a static mixer and cavitation venturi tube, using kerosene as collector and MIBC as f.other. Design of.the experimental procedure is combined with a statistical two-stepwise analysis to determine the optimal operating conditions f.r maximum recovery at a specif.ed grade. The ef.ect of.independent variables on the responses has been explained. Combustible material recovery of.85–90% at clean coal product of.10–11% ash is obtained f.om f.ed of.29.6% ash, with a much-reduced amount of.f.other and collector than that used in conventional column f.otation. The column f.otation process utilizing pico and nano bubbles can also be extended to the lower limit and upper limit of.particle size ranges, minus 75 lm and 300–600 lm, respectively, f.r better recovery.

关键词： Pico-nano bubble generation Cavitation venturi tube f.ne coal f.otation Statistical analysis method

Energy behavior of.Boris algorithm

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Chinese Physics B 2021年第5期30卷 492-498页

作者： Abdullah Zaf.r Majid khan Department of.Engineering and Applied Physics University of Science and Technology of ChinaHefei 230026China Department of.Physics Quaid-i-Azam UniversityIslamabad 45320Pakistan

Boris numerical scheme due to its long-time stability,accuracy and conservative properties has been widely applied in many studies of.magnetized *** algorithms conserve the phase space volume and hence provide accurate charge particle ***,this algorithm does not conserve the energy in some special electromagnetic conf.gurations,particularly f.r long simulation ***,we empirically analyze the energy behavior of.Boris algorithm by applying it to a 2D autonomous *** energy behavior of.the Boris method is f.und to be strongly related to the integrability of.our Hamiltonian *** f.nd that if.the invariant tori is preserved under Boris discretization,the energy error can be bounded f.r an exponentially long time,otherwise the said error will show a linear *** the contrary,f.r a non-integrable Hamiltonian system,a random walk pattern has been observed in the energy error.

关键词： Boris algorithm invariant tori chaotic system Hénon-Heiles potential

Doublecortin-like kinase 1 exhibits cancer stem cell-like characteristics in a human colon cancer cell line

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Chinese Journal of.Cancer Research 2013年第2期25卷 134-142页

作者： Lianna Li Charles f. Bellows Department of.Surgery Tulane University University of.Mississippi Cancer Institute

Objective： Colon cancer stem cells （CSCs） are implicated in colorectal cancer carcinogenesis, metastasis, and therapeutic resistance. The identif.cation of.these cells could help to develop novel therapeutic strategies. Doublecortin-like kinase 1 （DCLK1） has been viewed as a marker f.r gastrointestinal stem cells that f.el the self.renewal process, however others view them as a marker of.Tuf. cells or as an enteroendocrine subtype. The purpose of.this study was to use a colon cancer cell line to identif. and characterize the stem-like characteristics of.the DCLKI＋ cell population. Methods： To enrich stem-like cells, HCT116 cells （derived f.om colon adenocarcinomas） were cultured using serum-f.ee media to f.rm spheres under both normal oxygen and hypoxia condition. DCLK1 transcript expression in the adherent parental cells and spheroids was quantif.ed using quantitative real time reverse transcription- polymerase chain reaction [（q）RT-PCR]. DCLK1 protein expression was determined using f.ow cytometry. Self.renewal capability f.om adherent parental cells and spheroids was determined using extreme limiting dilution analysis （ELDA）. Results： Under both normal oxygen and hypoxia condition, the adherent parental cells were composed of.cells that express low levels of.DCLK1. However, spheroids exhibited an increased f.equency of.cells expressing DCLK1 on both mRNA and protein levels. Cells derived f.om spheroids also possess stronger self.renewal capability. Conclusions： The higher f.action of.DCLK1 ＋ cells exhibited by spheroids and hypoxia ref.ects the stem- like characteristics of.these cells. DCLK1 may represent an ideal marker to study and develop ef.ective strategies to overcome chemo-resistance and relapse of.colon cancer.

关键词： Doublecortin-like kinase 1 (DCLK1) colorectal cancer cancer stem cells stem cell marker spheroids