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| 1 | Warpage and Shrinkage Optimization of Injection-Molded Plastic Spoon Parts for Biodegradable Polymers Using Taguchi, ANOVA and Artificial Neural Network Methods显示文摘In this study, it is attempted to give an insight into the injection processability of three self-prepared polymers from A to Z. This work presents material analysis, injection molding simulation, design of experiments alongside considering all interaction effects of controlling parameters carefully for green biodegradable polymeric systems, including polylactic acid(PLA), polylactic acid-thermoplastic polyurethane(PLA-TPU) and polylactic acid-thermoplastic starch(PLA-TPS). The experiments were carried out using injection molding simulation software Autodesk Moldflow?in order to minimize warpage and volumetric shrinkage for each of the mentioned systems. The analysis was conducted by changing five significant processing parameters, including coolant temperature, packing time, packing pressure, mold temperature and melt temperature. Taguchi's L27(35) orthogonal array was selected as an efficient method for design of simulations in order to consider the interaction effects of the parameters and reduce spurious simulations. Meanwhile, artificial neural network(ANN) was also used for pattern recognition and optimization through modifying the processing conditions. The Taguchi coupled analysis of variance(ANOVA) and ANN analysis resulted in definition of optimum levels for each factor by two completely different methods. According to the results, melting temperature, coolant temperature and packing time had significant influence on the shrinkage and warpage. The ANN optimal level selection for minimization of shrinkage and/or warpage is in good agreement with ANOVA optimal level selection results. This investigation indicates that PLA-TPU compound exhibits the highest resistance to warpage and shrinkage defects compared to the other studied compounds. | Erfan Oliaei Behzad Shiroud Heidari Seyed Mohammad Davachi Mozhgan Bahrami Saeed Davoodi Iman Hejazi Javad Seyfi | 2016 | Journal of Materials Science & Technology2016，32，8： | 26 |
| 2 | Nanophotonic media for artificial neural inference显示文摘We show optical waves passing through a nanophotonic medium can perform artificial neural computing.Complex information is encoded in the wavefront of an input light. The medium transforms the wavefront to realize sophisticated computing tasks such as image recognition. At the output, the optical energy is concentrated in well-defined locations, which, for example, can be interpreted as the identity of the object in the image.These computing media can be as small as tens of wavelengths and offer ultra-high computing density. They exploit subwavelength scatterers to realize complex input/output mapping beyond the capabilities of traditional nanophotonic devices. | ERFAN KHORAM ANG CHEN DIANJING LIU LEI YING QIQI WANG MING YUAN ZONGFU YU | 2019 | Photonics Research2019，7，8： | 16 |
| 3 | A state-of-the-art review of the fabrication and characteristics of titanium and its alloys for biomedical applications显示文摘Commercially pure titanium and titanium alloys have been among the most commonly used materials for biomedical applications since the 1950 s.Due to the excellent mechanical tribological properties,corrosion resistance,biocompatibility,and antibacterial properties of titanium,it is getting much attention as a biomaterial for implants.Furthermore,titanium promotes osseointegration without any additional adhesives by physically bonding with the living bone at the implant site.These properties are crucial for producing high-strength metallic alloys for biomedical applications.Titanium alloys are manufactured into the three types ofα,β,andα+β.The scientific and clinical understanding of titanium and its potential applications,especially in the biomedical field,are still in the early stages.This review aims to establish a credible platform for the current and future roles of titanium in biomedicine.We first explore the developmental history of titanium.Then,we review the recent advancement of the utility of titanium in diverse biomedical areas,its functional properties,mechanisms of biocompatibility,host tissue responses,and various relevant antimicrobial strategies.Future research will be directed toward advanced manufacturing technologies,such as powder-based additive manufacturing,electron beam melting and laser melting deposition,as well as analyzing the effects of alloying elements on the biocompatibility,corrosion resistance,and mechanical properties of titanium.Moreover,the role of titania nanotubes in regenerative medicine and nanomedicine applications,such as localized drug delivery system,immunomodulatory agents,antibacterial agents,and hemocompatibility,is investigated,and the paper concludes with the future outlook of titanium alloys as biomaterials. | Masoud Sarraf Erfan Rezvani Ghomi Saeid Alipour Seeram Ramakrishna Nazatul Liana Sukiman | 2022 | Bio-Design and Manufacturing2022，5，2： | 8 |
| 4 | Microstructural Evolution of Nb–V–Mo and V Containing TRIP-assisted Steels during Thermomechanical Processing显示文摘The microstructural evolution and precipitation behaviour of Nb–V–Mo and single V containing transformation induced plasticity assisted steels were investigated during thermomechanical processing. A plane strain compression testing machine was used to simulate the thermomechanical processing. Microstructures were characterised by optical microscopy, scanning-transmission electron microscopy and microanalysis, and X-ray diffraction analysis, and Vickers hardness was obtained from the deformed specimens. The resulting microstructure of both Nb–V–Mo and V steels at room temperature primarily consisted of an acicular/bainitic ferrite, retained austenite and martensite surrounded by allotriomorphic ferrite.The TEM analysis showed that a signi?cant number of Nb(V,Mo)(C,N) precipitates were formed in the microstructure down to the ?nishing stage in Nb–V–Mo steel(i.e. 830 °C). It was also found that the V(C,N)precipitation primarily occurred in both ferrite and deformed austenite below the ?nishing stage. The results suggested that Nb–Mo additions considerably increased the temperature stability of microalloy precipitates and controlled the microstructural evolution of austenite. However, the microalloy precipitation did not cause a signi?cant precipitation strengthening in both Nb–V–Mo and V steels at room temperature. | Erfan Abbasi William Mark Rainforth | 2017 | Journal of Materials Science & Technology2017，33，4： | 7 |
| 5 | Validating a point of care lactate meter in adult patients with sepsis presenting to the emergency department of a tertiary care hospital of a low-to middle-income country显示文摘BACKGROUND: Timely identifi cation of high blood lactate levels in septic patients may allow faster detection of those patients requiring immediate resuscitation. Point-of-care(POC) testing is being increasingly utilized in the emergency department(ED). We examined the accuracy and timesaving effect of a handheld POC lactate device for the measurement of fingertip and whole blood lactate as compared with reference laboratory blood testing in septic ED patients.METHODS: A convenience sample of adult ED patients receiving serum lactate testing were enrolled prospectively in the ED of a multidisciplinary tertiary care hospital serving the population of one of the major cities of Pakistan. Participants underwent fi ngertip POC lactate measurement with a portable device and simultaneous whole blood sampling for analysis by both the POC lactate device and standard laboratory method. Lactate measurements were compared by intraclass correlation(ICC) and Bland and Altman plots.RESULTS: Forty-three septic patients were included in the study. The fingertip POC & whole blood POC lactate measurements each correlated tightly with the reference method(ICC=0.93 & ICC=0.92, respectively). Similarly at 6 hours, the fingertip POC & whole blood POC lactate measurements demonstrated satisfactory correlation with the reference method(ICC=0.95 & ICC=0.97, respectively).CONCLUSION: Fingertip POC lactate measurement is an accurate method to determine lactate levels in septic ED patients.KEY WORDS: Sepsis; Point of care; Lactate; Emergency department; | Muhammad Akbar Baig Hira Shahzad Erfan Hussain Asad Mian | 2017 | World Journal of Emergency Medicine2017，8，3： | 7 |
| 6 | 复合铸造工艺参数对A356-SiC_p复合材料显微组织和拉伸性能的影响(英文)显示文摘研究复合铸造工艺参数对A356-SiCp复合材料显微组织和拉伸性能的影响。在590、600和610°C的温度条件下,分别以200、400和600 r/min的速度对样品进行半固态搅拌,搅拌时间分别为10、20和30 min。分析SiC颗粒在基体材料中的分布、样品的孔隙率和拉伸性能。结果表明,通过延长搅拌时间和降低搅拌温度,可以提升颗粒分布的均匀性;然而,随着搅拌速度的提高,颗粒分布的均匀性呈先上升后下降的趋势。同时还发现,通过增大所有的工艺参数,孔隙率得到了提高。从抗拉特性来看,最佳的搅拌速度、温度和时间分别为400 r/min、590°C和30 min。与孔隙率相比,增强相分布的均匀性对拉伸性能的影响更明显。 | Hamed KHOSRAVI Hamed BAKHSHI Erfan SALAHINEJAD | 2014 | Transactions of Nonferrous Metals Society of China2014，24，8： | 6 |
| 7 | An experimental study of elastic properties of dragonfly-like flapping wings for use in biomimetic micro air vehicles(BMAVs)显示文摘This article studies the elastic properties of several biomimetic micro air vehicle(BMAV)wings that are based on a dragonfly wing.BMAVs are a new class of unmanned micro-sized air vehicles that mimic the flapping wing motion of flying biological organisms(e.g.,insects,birds,and bats).Three structurally identical wings were fabricated using different materials:acrylonitrile butadiene styrene(ABS),polylactic acid(PLA),and acrylic.Simplified wing frame structures were fabricated from these materials and then a nanocomposite film was adhered to them which mimics the membrane of an actual dragonfly.These wings were then attached to an electromagnetic actuator and passively flapped at frequencies of 10-250 Hz.A three-dimensional high frame rate imaging system was used to capture the flapping motions of these wings at a resolution of 320 pixels x 240 pixels and 35000 frames per second.The maximum bending angle,maximum wing tip deflection,maximum wing tip twist angle,and wing tip twist speed of each wing were measured and compared to each other and the actual dragonfly wing.The results show that the ABS wing has considerable flexibility in the chordwise direction,whereas the PLA and acrylic wings show better conformity to an actual dragonfly wing in the spanwise direction.Past studies have shown that the aerodynamic performance of a BMAV flapping wing is enhanced if its chordwise flexibility is increased and its spanwise flexibility is reduced.Therefore,the ABS wing(fabricated using a 3D printer) shows the most promising results for future applications. | Praveena Nair Sivasankaran Thomas Arthur Ward Erfan Salami Rubentheren Viyapuri Christopher J.Fearday Mohd Rafie Johan | 2017 | Chinese Journal of Aeronautics2017，30，2： | 5 |
| 8 | Processing of nanostructured metallic matrix composites by a modified accumulative roll bonding method with structural and mechanical considerations显示文摘Particulate reinforced metallic matrix composites have attracted considerable attention due to their lightweight,high strength,high specific modulus,and good wear resistance.AlB 4 C composite strips were produced in this work by a modified accumulative roll bonding process where the strips were rotated 90° around the normal direction between successive passes.Transmission electron microscopy and X-ray diffraction analyses reveal the development of nanostructures in the Al matrix after seven passes.It is found that the B 4 C reinforcement distribution in the matrix is improved by progression of the process.Additionally,the tensile yield strength and elongation of the processed materials are increased with the increase of passes. | Amir Hossein Yaghtin Erfan Salahinejad Ali Khosravifard | 2012 | International Journal of Minerals,Metallurgy and Materials2012，19，10： | 3 |
| 9 | Adaptive green traffic signal controlling using vehicular communication显示文摘The importance of using adaptive traffic signal control for figuring out the unpredictable traffic congestion in today's metropolitan life cannot be overemphasized. The vehicular ad hoc network(VANET), as an integral component of intelligent transportation systems(ITSs), is a new potent technology that has recently gained the attention of academics to replace traditional instruments for providing information for adaptive traffic signal controlling systems(TSCSs). Meanwhile, the suggestions of VANET-based TSCS approaches have some weaknesses:(1) imperfect compatibility of signal timing algorithms with the obtained VANET-based data types, and(2) inefficient process of gathering and transmitting vehicle density information from the perspective of network quality of service(Qo S). This paper proposes an approach that reduces the aforementioned problems and improves the performance of TSCS by decreasing the vehicle waiting time, and subsequently their pollutant emissions at intersections. To achieve these goals, a combination of vehicle-to-vehicle(V2V) and vehicle-to-infrastructure(V2I) communications is used. The V2 V communication scheme incorporates the procedure of density calculation of vehicles in clusters, and V2 I communication is employed to transfer the computed density information and prioritized movements information to the road side traffic controller. The main traffic input for applying traffic assessment in this approach is the queue length of vehicle clusters at the intersections. The proposed approach is compared with one of the popular VANET-based related approaches called MC-DRIVE in addition to the traditional simple adaptive TSCS that uses the Webster method. The evaluation results show the superiority of the proposed approach based on both traffic and network Qo S criteria. | Erfan SHAGHAGHI Mohammad Reza JABBARPOUR Rafidah MD NOOR Hwasoo YEO Jason J.JUNG | 2017 | Frontiers of Information Technology & Electronic Engineering2017，18，3： | 3 |
| 10 | CO_(2) sequestration through direct aqueous mineral carbonation of red gypsum显示文摘In this study,the physical and chemical characteristics and direct aqueous mineral carbonation of red gypsum have been investigated.The characterization studies showed that red gypsum is a very potential feedstock for mineral carbonation.It is mainly consisted of CaO,Fe2O3 and SO3 along with some impurities.On the other hand,the carbonation results showed that direct aqueous carbonation of red gypsum resulted in CaCO3 and FeCO3 production,however,the carbonates purity and carbonation efficiency are still very low. | Amin Azdarpour Mohammad Afkhami Karaei Hossein Hamidi Erfan Mohammadian Bizhan Honarvar | 2018 | Petroleum2018，4，4： | 3 |
| 11 | A narrative review of the success of intramuscular gluteal injections and its impact in psychiatry显示文摘 | Erfan Soliman Sarujan Ranjan Tianyou Xu Carol Gee Aidan Harker Alvaro Barrera John Geddes | 2018 | Bio-Design and Manufacturing2018，1，3： | 3 |
| 12 | Comprehensive analysis of pulsed plasma nitriding preconditions on the fatigue behavior of AISI 304 austenitic stainless steel显示文摘This study aims to draw an exact boundary for microstructural and mechanical behaviors in terms of pulsed plasma nitriding conditions.The pulsed plasma nitriding treatment was applied to AISI 304 austenitic stainless steel at different temperatures and durations.Results reveal that nitriding depth increased as process temperature and duration increase.The nitriding depth remarkably increased at 475℃for 8 h and at 550℃for 4 h.An austenite structure was transformed into a metastable nitrogen-oversaturated body-centered tetragonal expanded austenite(S-phase)during low-temperature plasma nitriding.The S-phase was converted to CrN precipitation at 475℃for 8 h and at 550℃for 4 h.Surface hardness and fatigue limit increased through plasma nitriding regardless of process conditions.The best surface hardness and fatigue limit were obtained at 550℃for 4 h because of the occurrence of CrN precipitation. | Okan Unal Erfan Maleki Remzi Varol | 2021 | International Journal of Minerals,Metallurgy and Materials2021，28，4： | 2 |
| 13 | Formulation of an injectable implant for peptide delivery and mechanistic study of the effect of polymer molecular weight on its release behavior显示文摘 | Astaneh R Moghimi H R Erfan M | 2006 | Daru2006，14，2： | 1 |
| 14 | Simulation of front end loader bucket-soil interaction显示文摘 | NEZAMI Erfan G HASHASH Youssef M A ZHAO Dawei | 2007 | International Journal for Numerical and Analytical Methods in Geomechanics2007，31，9： | 1 |
| 15 | The effect of interaction time and saturation of rock on specific energy in ND:YAG laser perforating显示文摘 | M. Ahmadi M.R. Erfan M.J. Torkamany Gh.A. Safian | 2010 | Optics and Laser Technology2010，，1： | 1 |
| 16 | Bedside twist drill craniostomy for chronic subdural hematoma:a compsrative study显示文摘 | Horn EM Feiz Erfan I | 2006 | Burg Neurol2006，65，2： | 1 |
| 17 | The journey of multifunctional bone scaffolds fabricated from traditional toward modern techniques显示文摘As a bone scaffold,meeting all basic requirements besides dealing with other bone-related issues-bone cancer and accelerated regeneration-is not expected from traditional scaffolds,but a newer class of scaffolds called multifunctional.From a clinical point of view,being a multifunctional scaffold means reducing in healing time,direct costs-medicine,surgery,and hospitalization-and indirect costs-loss of mobility,losing job,and pain.The main aim of the present review is following the multifunctional bone scaffolds trend to deal with both bone regeneration and cancer therapy.Special consideration is given to different fabrication techniques which have been applied to yield these materials spanning from traditional to modern ones.Moreover,the hierarchical structure of bone plus bone cancers and available medicines to them are introduced to familiarize the potential reader of review with the pluri-disciplinary essence of the field.Eventually,a brief discussion relating to the future trend of these materials is provided. | Ashkan Bigham Firoozeh Foroughi Erfan Rezvani Ghomi Mohammad Rafienia Rasoul Esmaeely Neisiany Seeram Ramakrishna | 2020 | Bio-Design and Manufacturing2020，3，4： | 1 |
| 18 | Simulation of front end loader bucket-soil interaction 显示文摘 | Erfan G Nezami Youssef M A Hashash Dawei Zhao | 2007 | International journal for numerical and analytical methods in geomechanics2007，31，： | 1 |
| 19 | Dynamic earth pressure on rigid retaining walls induced by a neighboring machine foundation,by the meshless local Petrov-Galerkin method显示文摘Dynamic earth pressure induced by machine foundations on a neighboring retaining wall is analyzed with emphasis on factors which control the intensity and location of the design forces. The meshless local Petrov-Galerkin(MLPG) method is used to analyze the problem for a variety of retaining wall and machine foundation geometries. The soil medium is assumed to be homogeneous and visco-elastic. The machine foundation is idealized as a harmonic sinusoidal dynamic force often encountered in practice. A number of analyses have been made to reveal the effect of the loading frequency, the location and size of the foundation and the soil shear wave velocity on the distribution and magnitude of the dynamic earth pressure. Results indicate that there is a critical frequency and a critical location for which the passive pressure takes the maxima in the entire duration of the dynamic load. | Mehdi Veiskarami Arash Bahar Erfan Zandi Lak | 2015 | Earthquake Engineering and Engineering Vibration2015，14，4： | 1 |
| 20 | Properties of rubberized concretes containing silica fume显示文摘 | ERFAN G MEHMET G L TURAN O | 2004 | Cement and Concrete Research2004，34，2： | 1 |
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