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Study of shape isomer yields of ^(240)Am in the framework of a dynamical-statistical model

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Chinese Physics C 2010年第11期34卷 1714-1716页

作者： hadi Eslamizadeh Department of Physics Persian Gulf University

A dynamical statistical model is used to analyze the experimental shape isomer yields data in the reaction d＋240Pu at E=20–29 *** possibility of determining the nuclear dissipation is *** of the experimental data wi... 详细信息

关键词： fission fission barrier reduced dissipation coeffcient

New empirical model to evaluate groundwater flow into circular tunnel using multiple regression analysis

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International Journal of Mining Science and Technology 2017年第3期27卷 415-421页

作者： Farhadian hadi Katibeh Homayoon Departmen of Mining Engineering Faculty of Engineering University of Birjand Birjand Iran Department of Mining and Metallurgical Engineering Amirkabir University of Technology (Tehran Polytechnic) Tehran Iran

There are various analytical, empirical and numerical methods to calculate groundwater inflow into tun- nels excavated in rocky media. Analytical methods have been widely applied in prediction of groundwa- ter inflow to tunnels due to their simplicity and practical base theory. Investigations show that the real amount of water infiltrating into jointed tunnels is much less than calculated amount using analytical methods and obtained results are very dependent on tunnel＇s geometry and environmental situations. In this study, using multiple regression analysis, a new empirical model for estimation of groundwater seepage into circular tunnels was introduced. Our data was acquired from field surveys and laboratory analysis of core samples. New regression variables were defined after perusing single and two variables relationship between groundwater seepage and other variables. Finally, an appropriate model for estima- tion of leakage was obtained using the stepwise algorithm. Statistics like R, R2, R2e and the histogram of residual values in the model represent a good reputation and fitness for this model to estimate the groundwater seepage into tunnels. The new experimental model was used for the test data and results were satisfactory. Therefore, multiple regression analysis is an effective and efficient way to estimate the groundwater seeoage into tunnels.

关键词： Groundwater inflow Analytical equation Multiple regression analysis Stepwise algorithm Tunnel

Histogram of the node strength and histogram of the edge weight: two new features for RGB-D person re-identification

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Science China(Information Sciences) 2018年第9期61卷 112-125页

作者： Zeynab IMANI hadi SOLTANIZADEH Electrical and Computer Engineering Faculty Semnan Univercity

Person re-identification is a classical task for any multi-camera surveillance system. Most of the existing researches on re-identification are based on features extracted from RGB images. However,there are many deficiencies in RGB image processing, some of which are requiring a lot of illumination and high computation. In this paper, novel features are proposed for RGB-D person re-identification. First, the complex network approach in texture recognition is modified and its threshold function is changed for using in depth images extracted by RGB-D sensors. Then, two novel measurements named the histogram of the edge weight(HEW) and the histogram of the node strength(HNS) are introduced on complex *** features fit both single-shot and multi-shot person re-identification. In the single-shot case, the HNS is extracted from only one frame while for the multi-shot case it is extracted from both one frame and multi-frames. These proposed measurements are called histogram of the spatial node strength(HSNS)and histogram of the temporal node strength(HTNS) respectively. Subsequently, these measurements are combined with skeleton features using score-level fusion. The method is evaluated using two benchmark databases and the results show that ours outperforms some state-of-the-art methods.

关键词： complex network edge weight graph node strength person re-identification skeleton features

Proposal of a probabilistic assessment of structural collapse concomitantly subject to earthquake and gas explosion

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Frontiers of Structural and Civil Engineering 2018年第3期12卷 425-437页

作者： Gholamreza ABDOLLAHZADEH hadi FAGHIHMALEKI Department of Civil Engineering Babol Noshirvani University of Technology Shariati Av. Babol Mazandaran Iran

In recent decades, many public buildings, located in seismic-prone residential areas, had to grapple with abnormal loads against which the structures were unguarded. In this piece of research, an ordinary three dimensional reinforced concrete building is selected as case study. The building is located in an earthquake-prone region; however, it is designed according to seismic building codes. Yet, it is not shielded against abnormal loads, such as blasts. It is assumed that the building suffers a blast load, due to mechanical/thermal installation failure during or after intense seismic oscillations. These two critical incidents are regarded codependent and compatible. So the researchers developed scenarios and tried to assess different probabilities for each scenario and carried out an analysis to ensure if progressive collapse had set in or not. In the first step, two analysis models were used for each scenario; a non-linear dynamic time history analysis and a blast local dynamic analysis. In the second step, having the structural destructions of the first step in view, a pushdown analysis was carried out to determine the severity of progressive collapse and assess building robustness. Finally, the annual probability of structural collapse under simultaneous earthquake and blast loads was estimated and offered.

关键词： gas blast pushdown analysis progressive collapse annual probability of structural collapse 3D model of structure

Robust Finite-time Synchronization of Non-identical Fractional-order Hyperchaotic Systems and Its Application in Secure Communication

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IEEE/CAA Journal of Automatica Sinica 2019年第1期6卷 228-235页

作者： hadi Delavari Milad Mohadeszadeh the Electrical Engineering Department Hamedan University of Technology

This paper proposes a novel adaptive sliding mode control(SMC) method for synchronization of non-identical fractional-order(FO) chaotic and hyper-chaotic systems. Under the existence of system uncertainties and external disturbances,finite-time synchronization between two FO chaotic and hyperchaotic systems is achieved by introducing a novel adaptive sliding mode controller(ASMC). Here in this paper, a fractional sliding surface is proposed. A stability criterion for FO nonlinear dynamic systems is introduced. Sufficient conditions to guarantee stable synchronization are given in the sense of the Lyapunov stability theorem. To tackle the uncertainties and external disturbances, appropriate adaptation laws are introduced. Particle swarm optimization(PSO) is used for estimating the controller parameters. Finally, finite-time synchronization of the FO chaotic and hyper-chaotic systems is applied to secure communication.

关键词： Adaptive sliding mode control (ASMC) chaos synchronization fractional order (FO) hyper-chaotic system Lyapunov theorem secure communication

Groutability classification of granular soils with cement grouts

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Journal of Rock Mechanics and Geotechnical Engineering 2023年第6期15卷 1580-1590页

作者： hadi Farhadian Zeynab Maleki Department of Mining Engineering Faculty of EngineeringUniversity of BirjandBirjandIran School of Earth Sciences Damghan UniversityDamghanIran

This research aims to develop a methodology for applying the geostatistical method to generate a groutability classification for granular *** ensure the precision of the suggested technique,a total of 103 data samples were *** the groutability of granular soils has always been difficult because of many soil *** a result,a new two-dimensional graph,the groutability classification of granular soil(GCS)chart,was *** establishment was based on data analysis of the grain size of soil and cement-based grouts(N1 and N2),relative density(Dr)and fines content of the soil(FC),water/cement ratio of grout mixture(w/c),and grouting pressure(P),all of which have a direct impact on the groutability of soil *** geostatistical method was used to develop and compile the GCS graph based on the aforementioned parameters with the use of coefficient S,which is a coefficient of the scoring set of parameters including P,w/c,Dr,and *** validation process was carried out hierarchically,with an additional set of 30 *** proposed method has a prediction accuracy of roughly 96.7%,demonstrating a helpful *** proposed approach can be easily implemented in practical engineering situations because it has a comparable syntax to commonly used *** should be noted that the proposed formula was only tested using the data samples collected,and the applicability of the produced procedure to other situations requires more examination.

关键词： Prediction Groutability Classification Groutability classification of granular soil(GCS)

Evaluation of electrical and optical characteristics of ZnO/CdS/CIS thin film solar cell

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Chinese Physics B 2016年第2期25卷 388-392页

作者： hadi Zarei Rasoul Malekfar Department of Physics Tarbiat Modares University P O. Box 14115-175 Tehran I. R./ran

In this study, device modeling and simulation are conducted to explain the effects of each layer thickness and temperature on the performance of ZnO/CdS/CIS thin film solar cells. Also, the thicknesses of the CIS and CdS absorber layers are considered in this work theoretically and experimentally. The calculations of solar cell performances are based on the solutions of the well-known three coupling equations： the continuity equation for holes and electrons and the Poisson equation. Our simulated results show that the efficiency increases by reducing the CdS thickness. Increasing the CIS thickness can increase the efficiency but it needs more materials. The efficiency is more than 19% for a CIS layer with a thickness of 2 μm. CIS nanoparticles are prepared via the polyol route and purified through centrifugation and precipitation *** nanoparticles are dispersed to obtain stable inks that could be directly used for thin-film deposition via spin *** also obtain x-ray diffraction（XRD） peak intensities and absorption spectra for CIS experimentally. Finally, absorption spectra for the CdS window layer in several deposition times are investigated experimentally.

关键词： CIGS solar cell thin film efficiency CdS XRD

BANACH SPACES AND INEQUALITIES ASSOCIATED WITH NEW GENERALIZATION OF CESàRO MATRIX

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Acta Mathematica Scientia 2023年第4期43卷 1518-1536页

作者： Feyzi BASAR hadi ROOPAEI Department of Primary Mathematics Teacher Education Inonu University44280–MalatyaTurkiye Department of Mathematics and Statistics University of VictoriaVictoriaCanada

Let the triangle matrix A^(ru)be a generalization of the Cesàro matrix and U∈{c_(0),c,l_(∞)}.In this study,we essentially deal with the space U(A^(ru))defined by the domain of A^(ru)in the space U and give the bases,and determine the Kothe-Toeplitz,generalized K?theToeplitz and bounded-duals of the space U(A^(ru)).We characterize the classes(l_(∞)(A^(ru)):l_(∞)),(l_(∞)(A^(ru)):c),(c(A^(ru)):c),and(U:V(A^(ru)))of infinite matrices,where V denotes any given sequence ***,we also present a Steinhaus type *** an another result of this study,we investigate the l_(p)-norm of the matrix A^(ru)and as a result obtaining a generalized version of Hardy's inequality,and some inclusion ***,we compute the norm of well-known operators on the matrix domain l_(p)(A^(ru)).

关键词： matrix domain normed sequence space duals and matrix transformations

New ordered MAX phase Mo_2 TiAlC_2: Elastic and electronic properties from first-principles

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Chinese Physics B 2016年第10期25卷 323-329页

作者： M A hadi M S Ali Department of Physics University of Rajshahi Department of Physics Pabna University of Science and Technology

First-principles computation on the basis of density functional theory(DFT) is executed with the CASTEP code to explore the structural, elastic, and electronic properties along with Debye temperature and theoretical Vickers’ hardness of newly discovered ordered MAX phase carbide Mo2TiAlC2. The computed structural parameters are very reasonable compared with the experimental results. The mechanical stability is verified by using the computed elastic constants. The brittleness of the compound is indicated by both the Poisson’s and Pugh’s ratios. The new MAX phase is capable of resisting the pressure and tension and also has the clear directional bonding between atoms. The compound shows significant elastic anisotropy. The Debye temperature estimated from elastic moduli(B, G) is found to be 413.6 K. The electronic structure indicates that the bonding nature of Mo2TiAlC2is a mixture of covalent and metallic with few ionic characters. The electron charge density map shows a strong directional Mo–C–Mo covalent bonding associated with a relatively weak Ti–C *** calculated Fermi surface is due to the low-dispersive Mo 4d-like bands, which makes the compound a conductive *** hardness of the compound is also evaluated and a high value of 9.01 GPa is an indication of its strong covalent bonding.

关键词： new ordered MAX phase density functional theory calculations Debye temperature Vickers hardness