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| 1 | Optimal PD/PID control of smart base isolated buildings equipped with piezoelectric friction dampers显示文摘Long-period pulses in near-field earthquakes lead to large displacements in the base of isolated structures.To dissipate energy in isolated structures using semi-active control,piezoelectric friction dampers(PFD) can be employed.The performance of a PFD is highly dependent on the strategy applied to adjust its contact force.In this paper,the seismic control of a benchmark isolated building equipped with PFD using PD/PID controllers is developed.Using genetic algorithms,these controllers are optimized to create a balance between the performance and robustness of the closed-loop structural system.One advantage of this technique is that the controller forces can easily be estimated.In addition,the structure is equipped with only a single sensor at the base floor to measure the base displacement.Considering seven pairs of earthquakes and nine performance indices,the performance of the closed-loop system is evaluated.Then,the results are compared with those given by two well-known methods:the maximum possive operation of piezoelectric friction dampers and LQG controllers.The simulation results show that the proposed controllers perform better than the others in terms of simultaneous reduction of floor acceleration and maximum displacement of the isolator.Moreover,they are able to reduce the displacement of the isolator systems for different earthquakes without losing the advantages of isolation. | Sadegh Etedali Mohammad Reza Sohrabi Saeed Tavakoli | 2013 | Earthquake Engineering and Engineering Vibration2013，12，1： | 17 |
| 2 | 广域保护中基于能量守恒原理的母线及输电线差动保护(英文)显示文摘提出一种基于能量守恒原理的纵联差动保护,对线路两端或母线各端的有功功率进行比较,若各端功率的和超出整定值,则判定为区内故障。在典型400 kV输电系统模型上,运用MATLAB仿真软件对所提出的原理进行了仿真验证。仿真结果表明,该方法比传统电流比率差动保护更加可靠且计算量小,因而可缩短动作时间。该方法能检测所有故障类型,适应于超高压远距离输电线路。 | Farhad NAMDARI Sadegh JAMALI Peter A CROSSLEY | 2007 | 电力系统自动化2007，31，3： | 13 |
| 3 | Na2S选择性浸出铜转炉烟灰中的砷及Fe2(SO4)3稳定化砷显示文摘研究砷(As2O3)的Na2S碱性浸出,以及用Fe2(SO4)3沉淀砷。采用基于中心组合设计的响应面法对相关因素的影响进行定量和定性分析,提出用于参数优化的统计模型。结果表明,在Na2S浓度100 g/L,固液比0.163 g/mL和温度80℃的最优预测条件下,89%的砷可从烟灰中去除。研究发现,固液比和Na2S浓度是影响浸出过程的显著因素。在沉淀过程中,当pH为4.8、Fe3+与砷的摩尔比和H2O2与砷的摩尔比分别为5:1和4:1时,浸出液中99.93%以上的砷以无定形砷酸铁的形式被除去。Fe3+与砷的摩尔比和pH值为最显著因素,而且他们之间的相互作用也是显著的。 | Amirhossein SHAHNAZI Sadegh FIROOZI Davoud HAGHSHENAS FATMEHSARI | 2020 | Transactions of Nonferrous Metals Society of China2020，30，6： | 10 |
| 4 | GIS-based spatial analysis of urban traffic accidents: Case study in Mashhad, Iran显示文摘There is a growing concern in traffic accident rate in recent years. Using Mashhad city(Iran second populous city) traffic accident records as case study, this paper applied the combination of geo-information technology and spatial-statistical analysis to bring out the influence of spatial factors in their formation. The aim of the study is to examine 4 clustering analyses to have a better understanding of traffic accidents patterns in complex urban network. In order to deploy the clustering technique in urban roads, 9331 point features for inner city traffic accidents during 12 months have been registered according to their x and y location in geographic information system(GIS). The mentioned areas were analyzed by kernel density estimation(KDE) using ARCMAP and two other analyses using SANET 4th edition software so that the results of network analysis can be compared with traditional KDE method. In addition, this research introduces five classifications for determining the eventfulness of the under study area based on standard deviation and to make priority in creating security in the area.The nearest neighbor and K-function output analysis consist of four curves and regarding the fact that for all fatal, injury and property damage only crashes, the observed value curve is above the 5% confidence interval. Accidents in the study region are more clustered than expected by random chance. The importance of this study is to use GIS as a management system for accident analysis by combination of spatial-statistical methods. | Gholam Ali Shafabakhsh Afshin Famili Mohammad Sadegh Bahadori | 2017 | Journal of Traffic and Transportation Engineering(English Edition)2017，4，3： | 8 |
| 5 | Helicobacter pylori antibiotic resistance in Iran显示文摘AIM: To examine the frequency of antibiotic resistance in Iranian Helicobacter pylori(H pylori) strains isolated from two major hospitals in Tehran.METHODS: Examination of antibiotic resistance was performed on 120 strains by modified disc diffusion test and PCR-RFLP methods. In addition, in order to identify the possible causes of the therapeutic failure in Iran, we also determined the resistance of these strains to the most commonly used antibiotics (metronidazole, amoxicillin,and tetracycline) by modified disc diffusion test.RESULTS: According to modified disc diffusion test, 1.6% of the studied strains were resistant to amoxicillin, 16.7% to clarithromycin, 57.5% to metronidazole, and there was no resistance to tetracycline. Of the clarithromycin resistant strains, 73.68% had the A2143G mutation in the 23S rRNA gene, 21.05% A2142C, and 5.26% A2142G.None of the sensitive strains were positive for any of the three point mutations. Of the metronidazole resistant strains, deletion in rdxA gene was studied and detected in only 6 (5%) of the antibiogram-based resistant strains.None of the metronidazole sensitive strains possessed rdxA gene deletion.CONCLUSION: These data show that despite the fact that clarithromycin has not yet been introduced to the Iranian drug market as a generic drug, nearly 20% rate of resistance alerts toward the frequency of macrolide resistance strains, which may be due to the widespread prescription of erythromycin in Iran. rdxA gene inactivation,if present in Iranian H pylori strains, may be due to other genetic defects rather than gene deletion. | Marjan Mohammadi Delaram Doroud Nazanin Mohajerani Sadegh Massarrat | 2005 | World Journal of Gastroenterology2005，11，38： | 8 |
| 6 | Modelling-based Optimisation of the Direct Synthesis of Dimethyl Ether from Syngas in a Commercial Slurry Reactor显示文摘在现在的学习,我们开发了一个多部件为为从 syngas 和 CO2 的 dimethyl 醚(DME ) 的直接合成的一个商业催化泥浆反应堆的模拟和优化的一个维的数学模型,在搅拌机狂暴的政体操作。DME 生产率和公司变换被调节操作条件优化,例如表面的煤气的速度,催化剂集中,在臼齿的煤气的流动率(W/F ) 上的催化剂团, syngas 作文,压力和温度。反应堆建模被完成利用集体平衡,全球运动模型和异构的水动力学。在异构的流动政体,气体被散布进二个水泡阶段:小、大。模拟结果用从飞行员植物获得的数据被验证。发达模型为大规模泥浆反应堆的设计也是适用的。 | Sadegh Papari Mohammad Kazemeini Moslem Fattahi | 2013 | Chinese Journal of Chemical Engineering2013，21，6： | 6 |
| 7 | Extractive oxidative desulfurization of model oil/crude oil using KSF montmorillonite-supported 12-tungstophosphoric acid显示文摘12-Tungstophosphoric acid(PW) supported on KSF montmorillonite, PW/KSF, was used as catalyst for deep oxidative desulfurization(ODS) of mixed thiophenic compounds in model oil and crude oil under mild conditions using hydrogen peroxide(H_2O_2) as an oxidizing agent. A one-factor-at-a-time method was applied for optimizing the parameters such as temperature, reaction time, amount of catalyst, type of extractant and oxidant-tosulfur compounds(S-compounds) molar ratio. The corresponding products can be easily removed from the model oil by using ethanol as the best extractant. The results showed high catalytic activity of PW/KSF in the oxidative removal of dibenzothiophene(DBT) and mixed thiophenic model oil under atmospheric pressure at 75 ℃ in a biphasic system. To investigate the oxidation and adsorption effects of crude oil composition on ODS, the effects of cyclohexene, 1,7-octadiene and o-xylene with different concentrations were studied. | Ezzat Rafiee Sadegh Sahraei Gholam Reza Moradi | 2016 | Petroleum Science2016，13，4： | 6 |
| 8 | Galerkin法研究磁场和热辐射作用下的非牛顿纳米流体在垂直平板间的流动和自然对流换热特性(英文)显示文摘研究了在磁场和热辐射作用下,非牛顿纳米流体在两个无限大的垂直平板间流动的自然对流换热和流动特性。首先,采用相似变换法,将偏微分形式的动量和能量守恒方程转化为特殊边界条件下的非线性常微分方程组。应用Galerkin方法(GM),获得非线性常微分方程组的解析解,并给出了非线性常微分方程组的数值解。对比分析解析解和数值解,验证了模型的准确性、精度和可靠性。最后,综合考虑了磁场、辐射参数和纳米流体体积分数等参数对速度、摩擦阻力系数和Nusselt数分布的影响。结果表明,随着磁力作用的增大,速度场、摩擦阻力系数和热性能下降。辐射参数虽然对增强的速度场影响不大,但降低了摩擦阻力系和Nusselt数的影响。 | Peyman MAGHSOUDI Gholamreza SHAHRIARI Hamed RASAM Sadegh SADEGHI | 2019 | Journal of Central South University2019，26，5： | 6 |
| 9 | Transition towards sustainability in agriculture and food systems:Role of information and communication technologies显示文摘Food sustainability transitions refer to transformation processes necessary to move towards sustainable food systems.Digitization is one of the most important ongoing transformation processes in global agriculture and food chains.The review paper explores the contribution of information and communication technologies(ICTs)to transition towards sustainability along the food chain(production,processing,distribution,consumption).A particular attention is devoted to precision agriculture as a food production model that integrates many ICTs.ICTs can contribute to agro-food sustainability transition by increasing resource productivity,reducing inefficiencies,decreasing management costs,and improving food chain coordination.The paper also explores some drawbacks of ICTs as well as the factors limiting their uptake in agriculture. | Hamid El Bilali Mohammad Sadegh Allahyari | 2018 | Information Processing in Agriculture2018，5，4： | 6 |
| 10 | Effect of melting temperature on microstructural evolutions, behavior and corrosion morphology of Hadfield austenitic manganese steel in the casting process显示文摘In this study, the effect of melting temperature on the microstructural evolutions, behavior, and corrosion morphology of Hadfield steel in the casting process is investigated. The mold was prepared by the sodium silicate/CO_2 method, using a blind riser, and then the desired molten steel was obtained using a coreless induction furnace. The casting was performed at melting temperatures of 1350, 1400, 1450, and 1500°C, and the cast blocks were immediately quenched in water. Optical microscopy was used to analyze the microstructure, and scanning electron microscopy(SEM) and X-ray diffractrometry(XRD) were used to analyze the corrosion morphology and phase formation in the microstructure, respectively. The corrosion behavior of the samples was analyzed using a potentiodynamic polarization test and electrochemical impedance spectroscopy(EIS) in 3.5 wt% NaCl. The optical microscopy observations and XRD patterns show that the increase in melting temperature led to a decrease of carbides and an increase in the austenite grain size in the Hadfield steel microstructure. The corrosion tests results show that with increasing melting temperature in the casting process, Hadfield steel shows a higher corrosion resistance. The SEM images of the corrosion morphologies show that the reduction of melting temperature in the Hadfield steel casting process induced micro-galvanic corrosion conditions. | Masoud Sabzi Sadegh Moeini Far Saeid Mersagh Dezfuli | 2018 | International Journal of Minerals,Metallurgy and Materials2018，25，12： | 5 |
| 11 | Numerical approach for enhanced oil recovery with surfactant flooding显示文摘The remained oil in the reservoir after conventional water-flooding processes,forms a dispersed phase in the form of oil drops which is trapped by capillary forces and is almost about 70%of the original oil in the place(OOIP).To reduce oil residual saturation in laboratory experiments and field projects,surfactant flooding is effective via decreasing the interfacial tension mobility ratio between oil and water phases.Estimation of the role of design variables,like chemical concentrations,partition coefficient and injection rate in different performance quantities,considering a heterogeneous and multiphase oil reservoir is a critical stage for optimal design.Increasing demand for oil production from water-flooded reservoirs has caused an increasing interest in surfactant-polymer(SP)and alkali-surfactant-polymer(ASP).Modeling minimizes the risk of high cost of chemicals by improving our insight of process.In the present paper,a surfactant compositional flood model for a three-component(water,petroleum and surfactant),two phase(aqueous and oleic)system is studied.A homogeneous,two-dimensional,isothermal reservoir with no free gas or alkali is assumed.The governing equations are in three categories:the continuity equations for the transport of each component,Darcy's equation for the transport of each phase and other auxiliary equations.The equations are solved by finite-differences using a procedure implicit in pressure and explicit in saturation.The validation of the model is achieved through comparing the modeling results with CMG simulators and BuckleyeLeverett theory.The results of modeling showed good agreement with CMG results,and the comparison with BuckleyeLeverett theory is explained according to different assumptions.After validation of the model,in order to investigate sensitivity analysis,the effects of system variables(partition coefficient,surface tension,oil viscosity and surface injection concentration)and performance variable(cumulative oil recovery)are studied.Finally,the comparison of oil recovery between water-flooding and surfactant-flooding was done.The results showed higher oil recovery with changes in capillary number when the partition coefficient is greater than unity.Increasing oil viscosity resulted in decreasing the oil recovery by changing in fractional flow.Moreover,it was concluded that the oil recovery was enhanced by increasing surfactant injection concentration.The oil recovery was increased when surfactant was injected to the system and this result was obtained by comparing water-flooding and surfactantflooding. | Sadegh Keshtkar Morteza Sabeti Amir H.Mohammadi | 2016 | Petroleum2016，2，1： | 4 |
| 12 | 问荆提取物页岩水化膨胀抑制剂性能及防膨机理显示文摘提出将问荆提取物作为页岩水化膨胀抑制剂,通过室内实验研究了其抑制页岩水化膨胀的性能,与氯化钾和聚胺进行了对比,并分析了其防膨机理。膨润土水化抑制实验、膨润土沉淀实验、动态线性膨胀实验、滚动回收实验和吸附量测定实验结果表明:问荆提取物可以抑制膨润土的水化,阻止黏土矿物在溶液中均匀分散,减小膨润土的膨胀,抑制钻屑在水中破碎和分散,且与氯化钾和聚胺性能相当。对问荆提取物的防膨机理进行分析后发现:其成分中具有活性烃基的物质与膨润土颗粒表面间氢键缔合,降低了膨润土颗粒表面的吸水率,从而抑制膨润土膨胀。除了具有良好的防膨能力,问荆提取物获取容易、价格低廉,且不会破坏生态环境,是一种理想的页岩水化膨胀抑制剂。 | BARATI Pezhman KESHTKAR Sadegh AGHAJAFARI Amirhossein SHAHBAZI Khalil MOMENI Ali | 2016 | 石油勘探与开发2016，43，3： | 4 |
| 13 | A hybrid LQR-PID control design for seismic control of buildings equipped with ATMD显示文摘这份报纸通过联合控制器和线性二次的管理者(LQR ) 控制的 proportional-integral-derivative (PID ) 的想法论述一条有效混合控制途径算法。当有古典 PID 控制器的优点时,建议 LQR-PID 控制器是容易的在地震激动的结构实现。基于杜鹃搜索(CS ) 使用一个优化过程算法, LQR-PID 控制器被设计为一地震 -- 与一个活跃的调节的团装备的激动的结构更潮湿(ATMD ) 。就四地震而言,建议 LQR-PID 控制器的表演被评估。然后,结果与一个 LQR 控制器给的那些相比。模拟结果显示 LQR-PID 在排水量的术语和结构的故事的加速在结构的地震回答的减小比 LQR 控制器更好表现。 | Amir Hossein HEIDARI Sadegh ETEDALI Mohamad Reza JAVAHERI-TAFTI | 2018 | Frontiers of Structural and Civil Engineering2018，12，1： | 4 |
| 14 | Diketene-based neat four-component synthesis of the dihydropyrimidinones and dihydropyridine backbones using silica sulfuric acid(SSA)显示文摘Heterocyclic skeleton building blocks to afford dihydropyrimidinones and dihydropyridines based on neat adducts of diketene,alcohols and aldehydes via silica sulfuric acid(SSA) catalyzed ring opening of diketene in four-component Biginelli-type and Hantzsch-type reactions are presented. | Sadegh Rostamnia Kamran Lamei | 2012 | Chinese Chemical Letters2012，23，8： | 4 |
| 15 | Unsteady MHD flow and heat transfer near stagnation point over a stretching/shrinking sheet in porous medium filled with a nanofluid显示文摘In this article, the unsteady magnetohydrodynamic(MHD) stagnation point flow and heat transfer of a nanofluid over a stretching/shrinking sheet is investigated numerically. The similarity solution is used to reduce the governing system of partial differential equations to a set of nonlinear ordinary differential equations which are then solved numerically using the fourth-order Runge–Kutta method with shooting technique. The ambient fluid velocity, stretching/shrinking velocity of sheet, and the wall temperature are assumed to vary linearly with the distance from the stagnation point. To investigate the influence of various pertinent parameters, graphical results for the local Nusselt number, the skin friction coefficient,velocity profile, and temperature profile are presented for different values of the governing parameters for three types of nanoparticles, namely copper, alumina, and titania in the water-based fluid. It is found that the dual solution exists for the decelerating flow. Numerical results show that the extent of the dual solution domain increases with the increases of velocity ratio, magnetic parameter, and permeability parameter whereas it remains constant as the value of solid volume fraction of nanoparticles changes. Also, it is found that permeability parameter has a greater effect on the flow and heat transfer of a nanofluid than the magnetic parameter. | Sadegh Khali Saeed Dinarvand Reza Hossei Hossein Tamim Ioan Pop | 2014 | Chinese Physics B2014，23，4： | 4 |
| 16 | Liquefaction assessment using microtremor measurement, conventional method and artificial neural network (Case study: Babol, Iran)显示文摘最近的研究人员为评估液化潜力发现了 microtremor 应用。Microtremor 测量是有广泛的应用的一个快、适用、划算的方法。在现在的研究,液化潜力被 microtremor 测量结果的利用在 Babol 城市里考察了。为这目的 microtremor,大小在 60 个测量车站被执行,数据被控告 Nakmauras 方法分析。由使用基本频率和扩大因素,危险索引的价值(K < 潜水艇 class= “ a-plus-plus ” > g ) 被计算,液化潜力被评估了。控制这个方法的精确性,它的输出与种子和 Idriss 的结果相比[1 ] 在在学习区域以内的 30 挖掘地上凿穿的方法。另外,人工的神经网络(ANN ) 获得的结果与 microtremor 测量相比。关于这三个方法的结果,液化潜力的阀值价值是 K,这被结束 < 潜水艇 class= “ a-plus-plus ” > g = 5。根据在这研究执行的分析, microtremors 有与理想的精确性估计液化潜力的能力,这被结束。 | Sadegh REZAEI Asskar Janalizadeh CHOOBBASTI | 2014 | Frontiers of Structural and Civil Engineering2014，8，3： | 3 |
| 17 | 石蜡相变材料作42CrMo4钢的热处理淬火介质显示文摘采用石蜡相变材料作为42CrMo4合金热处理的淬火介质,并与用水、空气和CuO掺杂石蜡作淬火介质进行比较。根据ASTME8M?98标准制备拉伸试样,将试样在电阻炉中加热至830°C,然后保温4 h,再在上述介质中淬火。根据得到的应力?应变曲线确定弹性模量、屈服强度、极限抗拉强度、伸长率和韧性模量。此外,还研究了不同介质热处理后的硬度和显微组织演化。石蜡与CuO掺杂石蜡淬火样品的极限抗拉强度(分别为1439和1306 MPa)高于在水(1190 MPa)和空气(1010 MPa)中淬火样品的。CuO掺杂石蜡淬火样品的硬度最高,为HV552。显微组织研究表明,非淬火钢具有铁素体/珠光体组织,而在水、石蜡和CuO掺杂石蜡中淬火,可获得铁素体/马氏体组织;还观察到,以空气为淬火介质,形成贝氏体/马氏体/铁素体三相组织。 | Milad SAKKAKI Farhad SADEGH MOGHANLOU Soroush PARVIZI Haniyeh BAGHBANIJAVID Aziz BABAPOOR Mehdi SHAHEDI ASL | 2020 | Journal of Central South University2020，27，3： | 3 |
| 18 | Hybrid classifier for fault location in active distribution networks显示文摘This paper presents a fast hybrid fault location method for active distribution networks with distributed generation(DG)and microgrids.The method uses the voltage and current data from the measurement points at the main substation,and the connection points of DG and microgrids.The data is used in a single feedforward artificial neural network(ANN)to estimate the distances to fault from all the measuring points.A k-nearest neighbors(KNN)classifier then interprets the ANN outputs and estimates a single fault location.Simulation results validate the accuracy of the fault location method under different fault conditions including fault types,fault points,and fault resistances.The performance is also validated for non-synchronized measurements and measurement errors. | Sadegh Jamali Alireza Bahmanyar Siavash Ranjbar | 2020 | Protection and Control of Modern Power Systems2020，5，1： | 3 |
| 19 | Numerical modeling of cavitation on spillway's flip bucket显示文摘 | Abbas PARSAIE Sadegh DEHDAR-BEHBAHANI Amir Hamzeh HAGHIABI | 2016 | Frontiers of Structural and Civil Engineering2016，10，4： | 3 |
| 20 | A survey of edge computing-based designs for IoT security显示文摘Pervasive IoT applications enable us to perceive,analyze,control,and optimize the traditional physical systems.Recently,security breaches in many IoT applications have indicated that IoT applications may put the physical systems at risk.Severe resource constraints and insufficient security design are two major causes of many security problems in IoT applications.As an extension of the cloud,the emerging edge computing with rich resources provides us a new venue to design and deploy novel security solutions for IoT applications.Although there are some research efforts in this area,edge-based security designs for IoT applications are still in its infancy.This paper aims to present a comprehensive survey of existing IoT security solutions at the edge layer as well as to inspire more edge-based IoT security designs.We first present an edge-centric IoT architecture.Then,we extensively review the edge-based IoT security research efforts in the context of security architecture designs,firewalls,intrusion detection systems,authentication and authorization protocols,and privacy-preserving mechanisms.Finally,we propose our insight into future research directions and open research issues. | Kewei Sha T.Andrew Yang Wei Wei Sadegh Davari | 2020 | Digital Communications and Networks2020，6，2： | 3 |
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