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photonic dark matter portal and quantum physics

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Chinese physics C 2016年第2期40卷 40-46页

作者： s.A.A1avi F.s.Kazemian Department of physics Hakim Sabzevari University P. O. Box 397 Sabzevar Iran

We study a model of dark matter in which the hidden sector interacts with standard model particles via a hidden photonic *** investigate the effects of this new interaction on the hydrogen atom,including the stark,Zeeman and hyperfine *** the accuracy of the measurement of energy,we obtain an upper bound for the coupling constant of the model as f≤10^-*** also calculate the contribution from the hidden photonic portal to the anomalous magnetic moment of the muon as αμ≤ 2.2 × 10^-23（for the dark particle mass scale 100MeV）,which provides an important probe of physics beyond the standard model.

关键词： dark matter quantum physics hidden sector photonic portal

Hybrid Color Texture Features Classification Through ANN for Melanoma

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Intelligent Automation & soft Computing 2023年第2期35卷 2205-2218页

作者： saleem Mustafa Arfan Jaffar Muhammad Waseem Iqbal Asma Abubakar Abdullah s.Alshahrani Ahmed Alghamdi Faculty of Computer science&Information Technology Superior UniversityLahore54600Pakistan Department of software Engineering Superior UniversityLahore54600Pakistan Department of Computer science&Artificial Intelligence College of Computer Science&EngineeringUniversity of Jeddah21493Saudi Arabia Department of software Engineering College of Computer Science and EngineeringUniversity of Jeddah21493Saudi Arabia

Melanoma is of the lethal and rare types of skin *** is curable at an initial stage and the patient can survive *** is very difﬁcult to screen all skin lesion patients due to costly *** are requiring a correct method for the right treatment for dermoscopic clinical features such as lesion borders,pigment networks,and the color of *** challenges are required an automated system to classify the clinical features of melanoma and non-melanoma *** trained clinicians can overcome the issues such as low contrast,lesions varying in size,color,and the existence of several objects like hair,reﬂections,air bubbles,and oils on almost all *** contour is one of the suitable methods with some drawbacks for the segmentation of irre-gular *** entropy and morphology-based automated mask selection is pro-posed for the active contour *** proposed method can improve the overall segmentation along with the boundary of melanoma *** this study,features have been extracted to perform the classiﬁcation on different texture scales like Gray level co-occurrence matrix(GLCM)and Local binary pattern(LBp).When four different moments pull out in six different color spaces like HsV,Lin RGB,YIQ,YCbCr,XYZ,and CIE L*a*b then global information from different colors channels have been ***,hybrid fused texture features;such as local,color feature as global,shape features,and Artiﬁcial neural network(ANN)as classiﬁers have been proposed for the categorization of the malignant and *** had been carried out on datasets Dermis,DermQuest,and *** results of our advanced method showed super-iority and contrast with the existing state-of-the-art techniques.

关键词： Gray level co-occurrence matrix local binary pattern artiﬁcial neural networks support vector machines color skin cancer dermoscopic

Numerical investigation of Reynolds number and scaling effects in microchannels flows

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Journal of Hydrodynamics 2017年第4期29卷 647-658页

作者： s.A.si salah E.G.Filali s.Djellouli Faculty of Mechanical and process Engineering Houari Boumedienne University

Compared with conventional channels, experiments of microchannel often exhibit some controversial findings and sometimes even opposite trends, most notably the effects of the Reynolds number and the scaled channel height on the poiseuille number. The experimental method has still been constrained by two key facts, firstly the current ability to machine microstructures and secondly the limitation of measurement of parameters related to the poiseuille number. As a consequence, numerical method was adopted in this study in order to analyze a flow in two-dimensional rectangular microchannels using water as working fluid. Results are obtained by the solution of the steady laminar incompressible Navier-stokes equations using control volume finite element method（CVFEM） without pressure correction. The computation was made for channel height ranging from 50 ？m to 4.58 ？m and Reynolds number varying from 0.4 to 1 600. The effect of Reynolds number and channel heights on flow characteristics was investigated. The results showed that the poiseuille numbers agree fairly well with the experimental measurements proving that there is no scale effect at small channel height. This scaling effect has been confirmed by two additional simulations being carried out at channel heights of 2.5 ？m and 0.5 ？m, respectively and the range of Reynolds number was extended from 0.01 up to 1 600. This study confirm that the conventional analysis approach can be employed with confidence for predicting flow behavior in microchannels when coupled with carefully matched entrance and boundary conditions in the dimensional range considered here.

关键词： Rectangular microchannel poiseuille number control volume finite element method(CVFEM) laminar flow minichannels

Review of Laser Assisted Machining of Ceramics (Invited paper)

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中国激光 2009年第12期36卷 3299-3307页

作者： s. sun M. Brandt M. s. Dargusch Industrial Laser Applications Laboratory IRISFaculty of Engineering and Industrial SciencesSwinburne University of TechnologyHawthornVictoriaAustralia CAsT Cooperative Research Centre Australia school of Engineering University of QueenslandQueenslandAustralia Defence Materials Technology Centre Australia

Laser assisted machining(LAM) takes the advantages of local heating and softening of workpiece by laser beam in front of the cutting *** local softening of workpiece at the shear zone enables much easier plastic deformation during *** paper reviews the up-to-date progress on LAM of *** covers the laser beam integration with cutting tools,analysis of temperature distribution around the cutting region,material removal mechanism,tool wear mechanism,and optimization of *** benefit of LAM and its optimization are discussed in terms of material removal temperature.

关键词：激光辅助加工技术刀具磨损机理激光束

parametric Analysis of Tensile properties of Bimodal Al Alloys by Finite Element Method

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Journal of Materials science & Technology 2009年第2期25卷 281-288页

作者： W.L. Zhang s. Li s.R. Nutt state Key Lab of MMCs Shanghai Jiao Tong University Shanghai 200030 China Department of Materials science University of Southern California Los Angeles CA 90089 USA

An axisymmetrical unit cell model was used to represent a bimodal Al alloy that was composed of both nano-grained （NG） and coarse-grained （CG） aluminum. Effects of microstructural and materials parameters on tensile properties of bimodal AI alloy were investigated by finite element method （FEM）. The parameters analyzed included aspect ratios of CG Al and the unit cell, volume fraction of CG Al （VFCG）, and yield strength and strain hardening exponent of CG Al. Aspect ratios of CG Al and the unit cell have no significant influence on tensile stress-strain response of the bimodal Al alloy. This phenomenon derives from the similarity in elastic modulus and coefficient of thermal expansion between CG AI and NG Al. Conversely, tensile properties of bimodal Al alloy are extremely sensitive to VFCG, yield strength and strain hardening exponent of CG Al. specifically, as VFCG increases, both yield strength and ultimate tensile strength （UTs） of the bimodal Al alloy decreases, while uniform strain of bimodal AI alloy increases. In addition, an increase in yield strength of CG Al results in an increase in both yield stress and UTs of bimodal AI alloy and a decrease in uniform strain of bimodal Al alloy. The lower capability in lowering the increase of stress concentration in NG Al due to a higher yield strength of CG Al causes the lower uniform strain of the bimodal AI alloy. When strain hardening exponent of CG Al increases, 0.2% yield stress, UTs, and uniform strain of the bimodal Al alloy increases. This can be attributed to the increased work-hardening ability of CG Al with a higher strain hardening exponent.

关键词： Nanomaterials Bimodal alloys Finite element method Tensile properties parametric analysis

A Continuous Action space Tree search for INverse desiGn (CAsTING) framework for materials discovery

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npj Computational Materials 2023年第1期9卷 500-515页

作者： suvo Banik Troy Loefller sukriti Manna Henry Chan srilok srinivasan pierre Darancet Alexander Hexemer subramanian K.R.s.sankaranarayanan Center for Nanoscale Materials Argonne National LaboratoryLemontIL 60439USA Department of Mechanical and Industrial Engineering University of IllinoisChicagoIL 60607USA Advanced Light source(ALs)Division Lawrence Berkeley National LaboratoryBerkeleyCA 94720USA

Material properties share an intrinsic relationship with their structural attributes,making inverse design approaches crucial for discovering new materials with desired *** Learning(RL)approaches are emerging as powerful inverse design tools,often functioning in discrete action *** constrains their application in materials design problems,which involve continuous search ***,we introduce an RL-based framework CAsTING(Continuous Action space Tree search for inverse design),that employs a decision tree-based Monte Carlo Tree search(MCTs)algorithm with continuous space adaptation through modified policies and *** representative examples like silver(Ag)for metals,Carbon(C)for covalent systems,and multicomponent systems such as graphane,boron nitride,and complex correlated oxides,we showcase its accuracy,convergence speed,and scalability in materials discovery and ***,with the inverse design of super-hard Carbon phases,we demonstrate CAsTING’s utility in discovering metastable phases tailored to user-defined target properties and preferences.

关键词： Action framework Tree

What's the next step in evaluating laparoscopic pancreaticoduodenectomy?

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Hepatobiliary surgery and Nutrition 2019年第5期8卷 555-556页

作者： Fernando Burdío Luís Grande Ignasi poves Department of surgery Hospital Universitari del MarAutonomous University of Barcelona.BarcelonaSpain

In the open approach,pancreaticoduodenectomy(pD)continues to be a high-risk procedure with a high rate ofsevere complications and a global death-rate of 9.2%and10.1%in some developed European countries,such asFrance and Germany,respectively(1,2).Most of reportedvolume-based outcome studies have found a strong inverseassociation between mortality and hospital volume.

关键词： mortality death evaluating

Effects of laser phase transformation hardening parameters on heat input and hardened-bead profile quality of unalloyed titanium

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Transactions of Nonferrous Metals society of China 2010年第6期20卷 1078-1091页

作者： D.s.BADKAR K.s.pANDEY G.BUVANAsHEKARAN Maulana Azad National Institute of Technology Welding Research Institute Bharat Heavy Electricals Limited

Laser transformation hardening(LTH)of unalloyed titanium of 1.6 mm-thick sheet,nearer to AsTM Grade 3 of chemical composition was investigated using 2 kW CW Nd:YAG *** effects of laser power(750-1 250 W),scanning speed(1 000-3 000 mm/min)and focal point position(from-10 to-30 mm)on the heat input,and hardened-bead geometry(*** bead width(HBW),hardened depth(HD)and angle of entry of hardened bead profile with the surface(AEHB))were investigated using response surface methodology(RsM).The experimental plan is based on Box-Behnken design matrix *** and quadratic polynomial equations for predicting the heat input and the hardened bead geometry were *** results indicate that the proposed models predict the responses adequately within the limits of hardening parameters being *** is suggested that regression equations can be used to find optimum hardening conditions for desired criteria.

关键词：激光相变硬化硬化参数热输入合金质量作者钛模型预测

sustainable Tourism Using security Cameras with privacy protecting Ability

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Journal of Information security 2010年第2期1卷 68-73页

作者： V. prashyanusorn Y. Fujii s. Kaviya s. Mitatha p. p. Yupapin 不详

For sustainable tourism, a novel method of security camera operation is proposed. In the method, security cameras, which encrypt the taken images and store them into the memory card inside, are used. Only when crimes occur, the memory cards are taken out from the cameras and the images are decrypted with the key and viewed by the city government and/or the police. When no crimes occur, images are overwritten by the new ones after a week automatically without being viewed by anyone. By using the stand-alone cameras without wiring to the control center, the installation cost and the operation cost are much lower than CCTV cameras. By using image encryption, the privacy of the tourists is protected. Using this system, high density installation of the security cameras with very low cost can be realized in encryption with image encryption privacy protection

关键词： Innovative Communication security Camera privacy safety sustainable Tourism Crime prevention