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A novel ensemble model for predicting the performance of a novel vertical slot fishway

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Frontiers of Structural and Civil Engineering 2020年第6期14卷 1418-1444页

作者： Aydin SHISHEGARAN mohammad SHOKROLLAHI ali MIRNOROLLAHI Arshia SHISHEGARAN mohammadreza mohammad KHANI Deparlment of Water and Environmental Engineering School of Civil EngineeringIran University of Science and TechnologyTehran ***Iran Department of Water and Environmental Engineering School of Civil EngineeringSemnan UniversitySemnan 35131-19111Iran Department of Water and Enironmental Engineering School of Civil EngineeringIslamic Azad University Central Tehran BranchTehran ***Iran School of Progress Engineering Iran University of Science and TechnologyTehran ***Iran

We investigate the performance of a novel vertical slot fishway by employing finite volume and surrogate *** linear regression,multiple log equation regression,gene expression programming,and combinations of these models are employed to predict the maximum turbulence,maximum velocity,resting area,and water depth of the middle pool in the *** statistical parameters and error terms,including the coefficient of determination,root mean square error,normalized square error,maximum positive and negative errors,and mean absolute percentage error were employed to evaluate and compare the accuracy of the *** also conducted a parametric *** independent variables include the opening between bafles(OBB),the ratio of the length of the large and small baffles,the volume flow rate,and the angle of the large *** results show that the key parameters of the maximum turbulence and velocity are the volume flow rate and OBB.

关键词： novel vertical slot fishway parametric study finite volume method ensemble model gene expression programming

Robust control approach for handling matched and/or unmatched uncertainties in port-controlled Hamiltonian systems

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IET Cyber-Systems and Robotics 2019年第3期1卷 73-80页

作者： Tahereh Binazadeh Mahsa karimi ali Reza Tavakolpour-Saleh Department of Electrical and Electronic Engineering Shiraz University of TechnologyShirazIran Department of Mechanical and Aerospace Engineering Shiraz University of TechnologyShirazIran

This study considers the problem of robust interconnection and damping assignment passivity-based control approach(IDA-PBC)for underactuated mechanical systems from two points of ***,the robustness of IDA-PBC in the presence of non-vanishing matched and unmatched uncertainties is analysed and sufficient conditions are derived to ensure ultimate boundedness of ***,the robust control design is provided by adding a new control input to the former controller designed by IDA-PBC,such that asymptotic stability of the closed-loop system in the face of non-vanishing matched uncertainties is ***,the proposed robust controller is evaluated through simulations of two practical examples,*** inertia wheel pendulum and a single-link elastic joint *** simulation outcomes clearly reveal the effectiveness of the presented robust controller.

关键词： matched vanishing Hamiltonian

Synthesis and Infrared Spectra Computation of Sterically Congested 2,2-Disubstituted Indane-1,3-dione Derivatives

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Chinese Journal of Structural Chemistry 2011年第4期30卷 568-574页

作者： Seyed mohammad Shoaei ali Reza Kazemizadeh ali Ramazani Department of Chemistry Islamic Azad UniversityZanjan Branch

Sterically congested 2,2-disubstituted indane-1,3-dione derivatives have been syn-thesized and characterized by 1H NMR,13C NMR,FT-IR and elemental *** B3LYP/HF calculations for computation of IR spectra have been carried out for the title compounds at the 6-31G and 6-311＋＋G basis set *** vibrational frequencies have been assigned and compared with the experimental FT-IR spectra and they are supported each other.

关键词： vibrational frequency DFT HF FT-IR spectra 2 2-disubstituted indane-1 3-dione isocyanide

Preparation and Characterization of DGEBA/EPN Epoxy Blends with Improved Fracture Toughness

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Chinese Journal of Polymer Science 2018年第5期36卷 632-640页

作者： Morteza Khalina mohammad Hosain Beheshty ali Salimi Department of Composites Iran Polymer and Petrochemical Institute Department of Resin and Adhesives Iran Polymer and Petrochemical Institute

The physical and mechanical properties of blends composed of two kinds of epoxy resins of different numbers of functional groups and chemical structure were studied. One of the resins was a bifunctional epoxy resin based on diglycidyl ether of bisphenol A and the other resin was a multifunctional epoxy novolac resin. Attempt was made to establish a correlation between the structure and the final properties of cured epoxy samples. The blend samples containing high fraction of multifunctional epoxy resin showed higher solvent resistance and lower flexural modulus compared with the blends containing high fraction of bifunctional epoxy resin. The epoxy blends showed significantly higher ductility under bending test than the neat epoxy samples. The compressive modulus and strength increased with increasing of multifunctional epoxy in the samples, probably due to enhanced cross-link density and molecular weight. Morphological analysis revealed the presence of inhomogeneous sub-micrometer structures in all samples. The epoxy blends exhibited significantly higher fracture toughness（by 23% at most） compared with the neat samples. The improvement of the fracture toughness was attributed to the stick-slip mechanism for crack growth and activation of shear yielding and plastic deformation around the crack growth trajectories for samples with higher content of bifunctional epoxy resin as evidenced by fractography study.

关键词： Epoxy Blend Functionality Mechanical property Toughness

Effects of intermediate Ni layer on mechanical properties of Al–Cu layered composites fabricated through cold roll bonding

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International Journal of Minerals,Metallurgy and Materials 2018年第5期25卷 573-583页

作者： ali Shabani mohammad Reza Toroghinejad alireza Bagheri Department of Materials Engineering Isfahan University of Technology

Layered composites have attracted considerable interest in the recent literature on metal composites. Their mechanical properties depend on the quality of the bonding provided by the intermediate layers. In this study, we analyzed the mechanical properties and bond strengths provided by the nickel layer with respect to its thickness and nature(either powder or coating). The results suggest that bond strength decreases with an increase in the content of nickel powder. At 0.3 vol% of nickel coating, we found the nature of nickel to be less efficient in terms of bond strength. A different picture arose when the content of nickel was increased and the bond strength increased in nickel coated samples. In addition, the results demonstrate that mechanical properties such as bend strength are strongly dependent on bond strength.

关键词： cold roll bonding Al/Ni/Cu composite mechanical testing metallography

Electronic Transport Through N24B24 Molecular Junction

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Chinese Journal of Chemical Physics 2016年第2期29卷 223-228,I0002页

作者： Mojtaba Yaghobi mohammad ali Ramzanpour mohammadReza Nyazian 伊朗伊斯兰自由大学阿莫尔

We have investigated the electron transport properties of a N24B24 molecule coupled to two metallic contacts with a combination of GW approximation and the non-equilibrium Green＇s- function technique. The calculations indicate that the four and three resonant tunneling peaks are seen for the density of states （DOS） curves in the cases of single and multiple atomic contacts, respectively. The off state and negative differential resistance （NDR） effect are observed in the I-V characteristics of the N24B24 molecule. The NDR behavior is also observed in voltages of about 354.5, 354, 354.6, and 354.3 V for one, four, six, and eight atomic contacts. Also, the I-V characteristics of N24B24 are in off state at low voltages that is independent of the contact types. The current contact types and indicate that N24B24 molecule curves against the gate voltage depend on behaves as a semiconductor.

关键词： Boron Nitride Cage Electronic transport Non-equilibrium Green's function

Peak displacement patterns for the performance-based seismic design of steel eccentrically braced frames

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Earthquake Engineering and Engineering Vibration 2019年第2期18卷 379-393页

作者： ali Fakhraddini Hamed Saffari mohammad Javad Fadaee Department of Civil Engineering Shahid Bahonar University of Kerman

Performance-based seismic design(PBSD) aims to assess structures at different damage states. Since damage can be directly associated to displacements, seismic design with consideration of displacement seems to be logical. In this study, simple formulae to estimate the peak floor displacement patterns of eccentrically braced frames(EBFs) at different performance levels subjected to earthquake ground motions are proposed. These formulae are applicable in a PBSD and especially in direct displacement-based design(DDBD). Parametric study is conducted on a group of 30 EBFs under a set of 15 far field and near field accelerograms which they scaled to different amplitudes to adapt various performance levels. The results of thousands of nonlinear dynamic analyses of EBFs have been post-processed by nonlinear regression analysis in order to recognize the major parameters that influence the peak displacement pattern of these frames. Results show that suggested displacement patterns have relatively good agreement with those acquired by an exact nonlinear dynamic analysis.

关键词： performance-based seismic design direct displacement-based design displacement pattern eccentrically braced frames steel building

A trapdoor one-way function for verifiable secret sharing

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High-Confidence Computing 2022年第2期2卷 34-40页

作者： ali Kanso mohammad Ghebleh Department of Mathematics Kuwait UniversityKuwait CityKuwait

This paper proposes a(t,n)-threshold verifiable secret sharing scheme with changeable parameters based on a trapdoor one-way *** scheme consists of a generation phase,a distribution phase,an encoding phase and a reconstruction *** generation and distribution phases are,respectively,based on Shamir’s and Feldman’s approaches,while the encoding phase is based on a novel trapdoor one-way *** the reconstruction phase,the shares and reconstructed secret are validated using a cryptographic hash *** comparison with existing schemes,the proposed scheme leaks no direct information about the secret from public ***,unlike some existing schemes,the generation and distribution phases of the proposed scheme are both independent of the *** feature leads to a number of advantages over existing approaches such as the dealer’s ability to perform the following modifications without updating the shares(i)modify the secret and(ii)adjust the threshold parameters of the ***,each participant receives a single share,and designated participants can be given the privilege of choosing their own shares for reconstructing a secret ***,the proposed scheme possesses a high level of security which is inherited from the schemes of Shamir and Feldman,in addition to the trapdoor one-way function and the employed cryptographic hash function.

关键词： Shamir’s scheme Feldman’s scheme Verifiable secret sharing schemes Secret sharing schemes with changeable threshold parameters Trapdoor one-way function Hash function

Antiviral Activity of Medicinal Plants against Human Coronavirus: a systematic scoping review of in vitro and in vivo experimentations

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Journal of Traditional Chinese Medicine 2022年第3期42卷 332-343页

作者： Parva Namiranian Omid Sadatpour Sadegh Azimzadeh Jamalkandi mohammad Hossein Ayati Mehrdad karimi Department of Traditional Medicine School of Persian MedicineTehran University of Medical SciencesTehranIran Department of Immunology School of MedicineTehran University of Medical SciencesTehranIran Chemical Injuries Research Center Systems Biology and Poisonings InstituteBaqiyatallah University of Medical SciencesTehranIran

OBJECTIVE:To investigate the in vitro and in vivo studies of natural compounds and medicinal plants with anti-coronavirus ***:A systematic review was performed based on Preferred Reporting Items for Systematic Reviews and Meta-Analyses and Animal Research:Reporting of in vivo experiments guidelines to find data for medicinal plants and natural products effective against human coronaviruses in in vitro or in vivo *** published up to September 6,2020 were ***(in vitro or in vivo)reporting the effect of medicinal plants and natural products or their derivatives on human coronavirus were included RESULTS:Promising anti-coronavirus effects are seen with different herbal compounds like some diterpenoids,sesquiterpenoids,and three compounds in tea with 3 CLpro inhibiting effect of Severe Acute Respiratory Syndrome Coronavirus(SARS-Co V);Hirsutenone,Six cinnamic amides and bavachinin are PLpro inhibitors and Tanshinones are active on both 3 CLpro and *** flavonoid compounds of Citrus fruits act on Immunoregulation and target angiotensin-converting enzyme 2 which is used by SARS-COV for *** helicase is possibly inhibited by two compounds myricetin and ***:This review shows that complementary medicine have the potential for new drug discovery against *** research is needed before definitive conclusions can be made concerning the safety and efficacy of the use of these medicinal plants.

关键词： Coronavirus medicine,Persian medicine,Chinese traditional plants,medicinal new drug discovery