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A new integrable nonlocal modified KdV equation:Abundant solutions with distinct physical structures

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Journal of Ocean Engineering and Science 2017年第1期2卷 1-4页

作者： Abdul-majid Wazwaz Department of Mathematics Saint Xavier UniversityChicagoIL 60655United States

In this work we study a new integrable nonlocal modified Korteweg-de Vries equation(mKdV)which arises from a reduction of the AKNS scattering *** use a variety of distinct techniques to determine abundant solutions with distinct physical *** show that this nonlocal equation possesses a family of traveling solitary wave solutions that include solitons,kinks,periodic and singular solutions.

关键词： Nonlocal modified KdV equation Soliton solutions Periodic solutions Exponential solutions

Energy efficiency of small buildings with smart cooling system in the summer

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Frontiers in Energy 2022年第4期16卷 651-660页

作者： Yazdan DANESHVAR majid SABZEHPARVAR Seyed Amir Hossein HASHEMI Department of Civil Engineering Qazvin BranchIslamic Azad UniversityQazvin 314199-15195Iran Department of Industrial Engineering Collage of EngineeringKaraj BranchIslamic Azad UniversityKaraj 31499-68111Iran

In this paper,a novel cooling control strategy as part of the smart energy system that can balance thermal comfort against building energy consumption by using the sensing and machine programming technology was *** this goal,a general form of a building was coupled by the smart cooling system(SCS)and the consumption of energy with thermal comfort cooling of persons simulated by using the EnergyPlus software and compared with similar buildings without *** the beginning of the research,using the data from a survey in a randomly selected group of hundreds and by analyzing and verifying the results of the specific relationship between the different groups of people in the statistical society,the body mass index(BMI)and their thermal comfort temperature were obtained,and the sample building was modeled using the EnergyPlus *** result show that if an intelligent ventilation system that can calculate the thermal comfort temperature was used in accordance with the BMI of persons,it can save up to 35%of the cooling load of the building yearly.

关键词： smart home heating and cooling systems saving energy optimal consumption of energy

Experimental investigation on freeze-thaw durability of polymer concrete

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Frontiers of Structural and Civil Engineering 2021年第4期15卷 1038-1046页

作者： Khashayar JAFARI Fatemeh HEIDARNEZHAD Omid MOAMMER majid JARRAH Department of Civil and Environmental Engineering Pennsylvania State UniversityUniversity ParkPA16802USA Department of Civil Engineering Sharif University of TechnologyTehranIran Department of Civil and Environmental Engineering Washington State UniversityPullmanWA99164USA

Assessing the durability of concrete is of prime importance to provide an adequate service life and reduce the repairing cost of ***-thaw is one such test that indicates the ability of concrete to last a long time without a significant loss in its *** this study,the freeze-thaw resistance of polymer concrete containing different polymer contents was explored and compared to various conventional cement ***’fresh and hardened properties were assessed for their workability,air content,and compressive *** mass loss,length change,dynamic modulus of elasticity,and residual compressive strength were determined for all types of concretes subjected to freeze-thaw cycles according to ASTM C666-procedure *** showed that polymer concrete(PC)specimens prepared with higher dosages of polymer contents possessed better freeze-thaw durability compared to other *** high durability performance of PCs is mainly due to their impermeable microstructures,absence of water in their structure,and the high bond strength between aggregates and a polymer *** is also indicated that the performance of high-strength concrete containing air-entraining admixture is comparable with PC having optimum polymer content in terms of residual compressive strength,dynamic modulus of elasticity,mass loss,and length change.

关键词： durability test freeze-thaw resistance polymer concrete residual compressive strength ASTM C666-15

Bacteriophages and their applications in the diagnosis and treatment of hepatitis B virus infection

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World Journal of Gastroenterology 2014年第33期20卷 11671-11683页

作者： Babak Bakhshinejad majid Sadeghizadeh Department of Genetics Faculty of Biological Sciences Tarbiat Modares University Tehran 14115-111 Iran

Hepatitis B virus(HBV) infection is a major global health challenge leading to serious disorders such as cirrhosis and hepatocellular carcinoma. Currently, there exist various diagnostic and therapeutic approaches for HBV infection. However, prevalence and hazardous effects of chronic viral infection heighten the need to develop novel methodologies for the detection and treatment of this infection. Bacteriophages, viruses that specifically infect bacterial cells, with a long-established tradition in molecular biology and biotechnology have recently been introduced as novel tools for the prevention, diagnosis and treatment of HBV infection. Bacteriophages, due to tremendous genetic flexibility, represent potential to undergo a huge variety of surface modifications. This property has been the rationale behind introduction of phage display concept. This powerful approach, together with combinatorial chemistry, has shaped the concept of phage display libraries with diverse applications for the detection and therapy of HBV infection. This review aims to offer an insightful overview of the potential of bacteriophages in the development of helpful prophylactic(vaccine design), diagnostic and therapeutic strategies for HBV infection thereby providing new perspec-tives to the growing field of bacteriophage researches directing towards HBV infection.

关键词： Bacteriophage Hepatitis B virus Phage dis-play Phage library Biopanning Diagnosis Treatment Vaccine development

Comparison of performance of Ni-Mo/γ-alumina catalyst in HDS and HDN reactions of main distillate fractions

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Petroleum Science 2019年第3期16卷 645-656页

作者： Babak Behnejad majid Abdouss Ahmad Tavasoli Department of Chemistry Amirkabir University of Technology Tehran Iran School of Chemistry College of Science University of Tehran Tehran Iran

A bimetallic nickel-molybdenum catalyst supported on γ-alumina was synthesized by the two-step incipient wetness impregnation *** activity of the prepared Ni-Mo/γ-alumina catalyst was evaluated in a down flow fixed-bed *** this way,hydrodesulfurization(HDS)and hydrodenitrogenation(HDN)reactions of the main distillate fractions of crude oil were ***,SEM,TPR,ICP-OES,BET-BJH and nitrogen adsorption/desorption methods were used for characterizing the synthesized Ni-Mo/γ-alumina *** active metals with Ni/Mo mass ratio of 0.23 and total metal of 13.7 wt% were loaded on the support,similar to the commercial industrial *** performance tests were conducted at 3.0 MPa(for light naphtha and heavy naphtha)and at 4.5 MPa(for kerosene and gas oil).The results revealed that the total sulfur conversion of the light naphtha,heavy naphtha,kerosene and gas oil fractions was 98.3%,95%,91.7% and 90.1%(after 24 h),respectively.

关键词： HDS HDN Ni-Mo/γ-alumina Gas oil Kerosene Naphtha

Asymptotic-de sitter inflation in the light of the planck data

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Chinese Physics C 2018年第11期42卷 131-136页

作者： Ata Sojasi Ebrahim Yusofi majid Mohsenzadeh Department of physics Rasht Branch Islamic Azad University Department of Physics Ayatollah Amoli Branch Islamic Azad University Department of Physics Qom Branch Islamic Azad University

Planck 2015 data, emphasize that the background geometry during inflation is not pure de Sitter, but from the slow variation of Hubble parameter during the inflationary era, it can be quasi-de Sitter. This motivates us to consider an Asymptotic-de Sitter mode function for reconstructing of initial mode and primordial power spec- trum of curvature perturbation. Using Markov Chain Monte Carlo （MCMC） method together with applying recent observational constraints from the Cosmic Microwave Background （CMB） data for the parameterized asymptotic initial mode in term of c, show some deviation from Bunch-Davies mode （c=1）. Based on Planck 2015 data release the amplitude of scalar perturbations in 68% confidence level is 10^9As=9-0.42^＋0.42 and deviation from Bunch-Davies mode is - 0.05, i.e. c,- 1.05. In this parametrization, the CMB power spectrum of our model shows more red-tilt in comparison with ACDM model. Furthermore, we found upper limits for tensor-to-scaler ratio with different pivot scales.

关键词： inflation cosmic microwave background initial state

Investigation of Binding Energy and Potential in Mesons

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Communications in Theoretical Physics 2019年第7期71卷 813-818页

作者： Alireza Khalaghi majid Monemzadeh Narges Tazimi Department of Physics University of Kashan

Truly by looking through the analytical model of constituent quarks and further the importance of the effects of relativity on quark dynamics in studying the interior structure of mesons,in this research we have strived to have a much more precise modeling for quark interior *** by observing the constituent model of quarks,at first we consider the mesons as two-body system,then we place the considered calculated Potential,which is a function of location and spin,in Schr¨odinger’s *** we will solve the mentioned equation in analytical *** on this solution,we will import the spin and isospin interactions as perturbation in our problem,and finally by using these solutions we can obtain both binding energy and wave function for bound state and excited states of ***,by applying these calculations in the next and last step we will compare our data about meson’s binding energy and masses with others results.

关键词： mesons binding energy spin and isospin interactions Schrodinger's equation exact solution

Preface:Energy and sustainable development

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Journal of Central South University 2023年第11期30卷 3517-3518页

作者： majid SIAVASHI Müslüm ARICI School of Mechanical Engineering Iran University of Science and TechnologyTehranIran Department of Mechanical Engineering Kocaeli UniversityKocaeli41001Turkey

Energy demands are increasing continuously,and the development of sustainable technologies in energy systems is a critical and vital *** the required energy for social and economic needs in line with diminishing the environmental effects and pollution emissions is necessary to meet sustainable *** new energy systems with improved efficiency,securing the energy need,using clean and renewable energy sources,reducing energy losses and pollution,and expanding the availability and access to energy are the key elements of sustainable energy development.

关键词： pollution sustainable curing

Numerical analysis of rock fracturing by gas pressure using the extended finite element method

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Petroleum Science 2015年第2期12卷 304-315页

作者： majid Goodarzi Soheil Mohammadi Ahmad Jafari Department of Civil Engineering and Geoscience University of Newcastle School of Civil Engineering University of Tehran School of Mining Engineering University of Tehran

High energy gas fracturing is a simple approach of applying high pressure gas to stimulate wells by gen- erating several radial cracks without creating any other damages to the wells. In this paper, a numerical algorithm is proposed to quantitatively simulate propagation of these fractures around a pressurized hole as a quasi-static phenomenon. The gas flow through the cracks is assumed as a one-dimensional transient flow, governed by equations of conservation of mass and momentum. The fractured medium is modeled with the extended finite element method, and the stress intensity factor is calculated by the simple, though sufficiently accurate, displacement ex- trapolation method. To evaluate the proposed algorithm, two field tests are simulated and the unknown parameters are determined through calibration. Sensitivity analyses are performed on the main effective parameters. Considering that the level of uncertainty is very high in these types of engineering problems, the results show a good agreement with the experimental data. They are also consistent with the theory that the final crack length is mainly determined by the gas pressure rather than the initial crack length produced by the stress waves.

关键词： Gas fracturing Numerical modeling Extended finite element Fracture mechanics