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| 1 | Research and development in agricultural robotics:A perspective of digital farming显示文摘Digital farming is the practice of modern technologies such as sensors,robotics,and data analysis for shifting from tedious operations to continuously automated processes.This paper reviews some of the latest achievements in agricultural robotics,specifically those that are used for autonomous weed control,field scouting,and harvesting.Object identification,task planning algorithms,digitalization and optimization of sensors are highlighted as some of the facing challenges in the context of digital farming.The concepts of multi-robots,human-robot collaboration,and environment reconstruction from aerial images and ground-based sensors for the creation of virtual farms were highlighted as some of the gateways of digital farming.It was shown that one of the trends and research focuses in agricultural field robotics is towards building a swarm of small scale robots and drones that collaborate together to optimize farming inputs and reveal denied or concealed information.For the case of robotic harvesting,an autonomous framework with several simple axis manipulators can be faster and more efficient than the currently adapted professional expensive manipulators.While robots are becoming the inseparable parts of the modern farms,our conclusion is that it is not realistic to expect an entirely automated farming system in the future. | Redmond Ramin Shamshiri Cornelia Weltzien Ibrahim A.Hameed Ian J.Yule Tony E.Grift Siva K.Balasundram Lenka Pitonakova Desa Ahmad Girish Chowdhary | 2018 | International Journal of Agricultural and Biological Engineering2018，11，4： | 17 |
| 2 | Response evaluation of chemotherapy in metastatic colorectal cancer by contrast enhanced ultrasound显示文摘AIM:To evaluate whether contrast enhanced ultrasound(CEUS) might also be used for response prediction and early response evaluation in patients receiving bevacizumab based chemotherapy for metastasized colorectal cancer.METHODS:Thirty consecutive patients with non primary resectable liver metastases from colorectal cancer underwent CEUS before treatment(CEUS date 1) and before the second(CEUS date 2) and fourth(CEUS date 3) cycle of bevacizumab based chemotherapy.Three parameters [PEAK,Time to peak(TTP) and RISE RATE]were correlated with radiological response.RESULTS:For neoadjuvant purpose a reduction of tumour mass was required to assume clinical response.Based on these response criteria there was a significant(P < 0.001) correlation in TTP between metastases of responders(9.08 s) and non-responders(14.76 s) archived on CEUS date 1.By calculating a standardized quotient(metastases divided by normal liver tissue) we were able to define a cut off,predicting response with a sensitivity of 92.3 % and a specificity of 100 %.To reflect a palliative intention only those patients with progressive disease were classified as non-responders.In this stetting TTP was also significantly(P < 0.01) different between responders and non-responders.In contrast,Peak and Rise rate did not show any significant difference between responder and non-responder.CONCLUSION:CEUS might serve as a surrogate marker to predict treatment response in patients with metastasized colorectal cancer who receive antiangiogenic therapy. | Ramin Schirin-Sokhan Ron Winograd Christoph Roderburg Jhenee Bubenzer Nicole Cabral do ó Dorothee Guggenberger Hartmut Hecker Christian Trautwein Jens J W Tischendorf | 2012 | World Journal of Gastroenterology2012，18，6： | 16 |
| 3 | Physiological responses of Brassica napus to fulvic acid under water stress: Chlorophyll a fluorescence and antioxidant enzyme activity显示文摘The ameliorative effect of fulvic acid(0, 300, and 600 mg L-1) on photosystem II and antioxidant enzyme activity of the rapeseed(Brassica napus L.) plant under water stress(60, 100, and 140 mm evaporation from class A pan) was studied using split plots in a randomized complete block design with three replications. Results indicated that application of fulvic acid(FA) improved the maximum quantum efficiency of PSII(Fv/Fm)and performance index(PI) of plants under both well-watered and limited-water conditions. The time span from Foto Fmand the energy necessary for the closure of all reaction centers was significantly increased, but the size of the plastoquinone pool was reduced with increasing water stress levels. Plants treated with FA had higher peroxidase and catalase activities under all irrigation conditions. Activities of ascorbate peroxidase and superoxide dismutase in plants increased with increasing water stress. Malondialdehyde increased under severe water stress, but application of FA significantly decreased lipid peroxidation. Production of reactive oxygen species(ROS) is a common phenomenon in plants under stress. Under this condition, the balance between the production of ROS and the quenching activity of antioxidants is upset, often resulting in oxidative damage. In this study, application of FA significantly increased fluorescence of chlorophyll a, inhibiting ROS production and enhancing antioxidant enzymes activity that destroyed ROS. Thus, ROS in plant cells was reduced under water stress by application of FA and consequently lipid peroxidation was reduced. | Ramin Lotfi Mohammad Pessarakli Puriya Gharavi-Kouchebagh Hossein Khoshvaghti | 2015 | The Crop Journal2015，3，5： | 16 |
| 4 | Advances in greenhouse automation and controlled environment agriculture:A transition to plant factories and urban agriculture显示文摘Greenhouse cultivation has evolved from simple covered rows of open-fields crops to highly sophisticated controlled environment agriculture(CEA)facilities that projected the image of plant factories for urban agriculture.The advances and improvements in CEA have promoted the scientific solutions for the efficient production of plants in populated cities and multi-story buildings.Successful deployment of CEA for urban agriculture requires many components and subsystems,as well as the understanding of the external influencing factors that should be systematically considered and integrated.This review is an attempt to highlight some of the most recent advances in greenhouse technology and CEA in order to raise the awareness for technology transfer and adaptation,which is necessary for a successful transition to urban agriculture.This study reviewed several aspects of a high-tech CEA system including improvements in the frame and covering materials,environment perception and data sharing,and advanced microclimate control and energy optimization models.This research highlighted urban agriculture and its derivatives,including vertical farming,rooftop greenhouses and plant factories which are the extensions of CEA and have emerged as a response to the growing population,environmental degradation,and urbanization that are threatening food security.Finally,several opportunities and challenges have been identified in implementing the integrated CEA and vertical farming for urban agriculture. | Redmond Ramin Shamshiri Fatemeh Kalantari K.C.Ting Kelly R.Thorp Ibrahim A.Hameed Cornelia Weltzien Desa Ahmad Zahra Mojgan Shad | 2018 | International Journal of Agricultural and Biological Engineering2018，11，1： | 14 |
| 5 | High order aberration and straylight evaluation after cataract surgery with implantation of an aspheric,aberration correcting monofocal intraocular lens显示文摘·AIM: To evaluate the quality of vision in respect to high order aberrations and straylight perception after implantation of an aspheric, aberration correcting,monofocal intraocular lens(IOL).·METHODS: Twenty-one patients(34 eyes) aged 50 to83 y underwent cataract surgery with implantation of an aspheric, aberration correcting IOL(Tecnis ZCB00,Abbott Medical Optics). Three months after surgery they were examined for uncorrected(UDVA) and corrected distance visual acuity(CDVA), contrast sensitivity(CS)under photopic and mesopic conditions with and without glare source, ocular high order aberrations(HOA, Zywave II) and retinal straylight(C-Quant).· RESULTS: Postoperatively, patients achieved a postoperative CDVA of 0.0 log MAR or better in 97.1% of eyes. Mean values of high order abberations were +0.02±0.27(primary coma components) and-0.04 ±0.16(spherical aberration term). Straylight values of the C-Quant were 1.35±0.44 log which is within normal range of age matched phakic patients. The CS measurements under mesopic and photopic conditions in combination with and without glare did not show any statistical significance in the patient group observed(P ≥0.28).· CONCLUSION: The implantation of an aspherical aberration correcting monofocal IOL after cataractsurgery resulted in very low residual higher order aberration(HOA) and normal straylight. | Florian T A Kretz Tamer Tandogan Ramin Khoramnia Gerd U Auffarth | 2015 | International Journal of Ophthalmology(English edition)2015，8，4： | 14 |
| 6 | Simulation software and virtual environments for acceleration of agricultural robotics:Features highlights and performance comparison显示文摘Research efforts for development of agricultural robots that can effectively perform tedious field tasks have grown significantly in the past decade.Agricultural robots are complex systems that require interdisciplinary collaborations between different research groups for effective task delivery in unstructured crops and plants environments.With the exception of milking robots,the extensive research works that have been carried out in the past two decades for adaptation of robotics in agriculture have not yielded a commercial product to date.To accelerate this pace,simulation approach and evaluation methods in virtual environments can provide an affordable and reliable framework for experimenting with different sensing and acting mechanisms in order to verify the performance functionality of the robot in dynamic scenarios.This paper reviews several professional simulators and custom-built virtual environments that have been used for agricultural robotic applications.The key features and performance efficiency of three selected simulators were also compared.A simulation case study was demonstrated to highlight some of the powerful functionalities of the Virtual Robot Experimentation Platform.Details of the objects and scenes were presented as the proof-of-concept for using a completely simulated robotic platform and sensing systems in a virtual citrus orchard.It was shown that the simulated workspace can provide a configurable and modular prototype robotic system that is capable of adapting to several field conditions and tasks through easy testing and debugging of control algorithms with zero damage risk to the real robot and to the actual equipment.This review suggests that an open-source software platform for agricultural robotics will significantly accelerate effective collaborations between different research groups for sharing existing workspaces,algorithms,and reusing the materials. | Redmond Ramin Shamshiri Ibrahim A.Hameed Lenka Pitonakova Cornelia Weltzien Siva K.Balasundram Ian J.Yule Tony E.Grift Girish Chowdhary | 2018 | International Journal of Agricultural and Biological Engineering2018，11，4： | 11 |
| 7 | Microstructure and mechanical properties of Al/Cu/Mg laminated composite sheets produced by the ARB proces显示文摘In the present study, an Al/Cu/Mg multi-layered composite was produced by accumulative roll bonding(ARB) through seven passes, and its microstructure and mechanical properties were evaluated. The microstructure investigations show that plastic instability occurred in both the copper and magnesium reinforcements in the primary sandwich. In addition, a composite with a perfectly uniform distribution of copper and magnesium reinforcing layers was produced during the last pass. By increasing the number of ARB cycles, the microhardness of the layers including aluminum, copper, and magnesium was significantly increased. The ultimate tensile strength of the sandwich was enhanced continually and reached a maximum value of 355.5 MPa. This strength value was about 3.2, 2, and 2.1 times higher than the initial strength values for the aluminum, copper, and magnesium sheets, respectively. Investigation of tensile fracture surfaces during the ARB process indicated that the fracture mechanism changed to shear ductile at the seventh pass. | Davood Rahmatabadi Moslem Tayyebi Ramin Hashemi Ghader Faraji | 2018 | International Journal of Minerals,Metallurgy and Materials2018，25，5： | 10 |
| 8 | Laying hen performance,egg quality improved and yolk 5-methyltetrahydrofolate content increased by dietary supplementation of folic acid显示文摘This study was performed to evaluate the effect of folic acid(FA) on performance, egg quality and yolk5-methyltetrahydrofolate(5-MTHF) content. A total of 384 Hy-line W36 strain hens from 52 to 58 weeks of age were randomly assigned to 4 groups, and each group received one of following dietary treatments:0, 5.10 and 15 mg FA/kg diet. A completely randomized design was used. Egg production percentage, egg mass and egg weight were increased significantly(P < 0.05) and feed conversion ratio(FCR) was reduced significantly(P < 0.05) by increasing FA content in diets. No significant differences were detected among treatments on egg quality except for shell thickness. The dietary supplementations of laying hens diets with FA significantly increased yolk 5-MTHF content(P = 0.02). Overall, these data demonstrate that dietary supplementation with FA raised 5-MTHF content of yolk and productivity of egg production in laying hens. | Sattar Bagheri Hossein Janmohammadi Ramin Maleki Alireza Ostadrahimi Ruhollah Kianfar | 2019 | Animal Nutrition2019，，2： | 9 |
| 9 | Development of a new connection for precast concrete walls subjected to cyclic loading显示文摘The Industrialized Building System(IBS) was recently introduced to minimize the time and cost of project construction.Accordingly, ensuring the integration of the connection of precast components in IBS structures is an important factor that ensures stability of buildings subjected to dynamic loads from earthquakes, vehicles, and machineries.However, structural engineers still lack knowledge on the proper connection and detailed joints of IBS structure construction.Therefore, this study proposes a special precast concrete wall-to-wall connection system for dynamic loads that resists multidirectional imposed loads and reduces vibration effects(PI2014701723).This system is designed to connect two adjacent precast wall panels by using two steel U-shaped channels(i.e., male and female joints).During casting, each joint is adapted for incorporation into a respective wall panel after considering the following conditions: one side of the steel channel opens into the thickness face of the panel; a U-shaped rubber is implemented between the two channels to dissipate the vibration effect; and bolts and nuts are used to create an extension between the two U-shaped male and female steel channels.The developed finite element model of the precast wall is subjected to cyclic loads to evaluate the performance of the proposed connection during an imposed dynamic load.Connection performance is then compared with conventional connections based on the energy dissipation, stress, deformation, and concrete damage in the plastic range.The proposed precast connection is capable of exceeding the energy absorption of precast walls subjected to dynamic load, thereby improving its resistance behavior in all principal directions. | Ramin Vaghei Farzad Hejazi Hafez Taheri Mohd Saleh Jaafar Farah Nora Aznieta Abdul Aziz | 2017 | Earthquake Engineering and Engineering Vibration2017，16，1： | 8 |
| 10 | Electroconvulsive therapy and/or plasmapheresis in autoimmune encephalitis?显示文摘Autoimmune encephalitis is a poorly understood condition that can present with a combination of neurological and psychiatric symptoms, either of which may predominate. There are many autoantibodies associated with a variety of clinical syndromes-anti-N-Methyl-D-Aspartate receptor(NMDAR) is the commonest. Currently, the most widely used therapy is prompt plasmapheresis and steroid treatment(and tumour resection if indicated), followed by second line immunosuppression if this fails. Given the growing awareness of autoimmune encephalitis as an entity, it is increasingly important that we consider it as a potential diagnosis in order to provide timely, effective treatment. We discuss several previously published case reports and one new case. These reports examined the effects of electroconvulsive therapy(ECT) on patients with autoimmune encephalitis, particularly those in whom psychiatric symptoms are especially debilitating and refractory to standard treatment. We also discuss factors predicting good outcome and possible mechanisms by which ECT may be effective. Numerous cases, such as those presented by Wingfield, Tsutsui, Florance, Sansing, Braakman and Matsumoto, demonstrate effective use of ECT in anti-NMDAR encephalitis patients with severe psychiatric symptoms such as catatonia, psychosis, narcolepsy and stupor who had failed to respond to standard treatments alone. We also present a new case of a 71-year-old female who presented to a psychiatric unit initially with depression, which escalated to catatonia, delusions, nihilism and auditory hallucinations. After anti-NMDAR antibodies were isolated, she was treated by the neurology team with plasmapheresis and steroids, with a partial response. She received multiple sessions of ECT and her psychiatric symptoms completely resolved and she returned to her premorbid state. For this reason, we suggest that ECT should be considered, particularly in those patients who are non-responders to standard therapies. | Jessica L Gough Jan Coebergh Brunda Chandra Ramin Nilforooshan | 2016 | World Journal of Clinical Cases2016，4，8： | 8 |
| 11 | Diagnostic accuracy of fluorine-18-fluorodeoxyglucose positron emission tomography in gallbladder cancer: A meta-analysis显示文摘AIM: To meta-analyze published data about the diagnostic accuracy of fluorine-18-fluorodeoxyglucose(18F-FDG) positron emission tomography(PET) and PET/computed tomography(PET/CT) in the evaluation of primary tumor in patients with gallbladder cancer(GBCa).METHODS: A comprehensive literature search of studies published through 30 th June 2014 regarding the role of 18F-FDG PET and PET/CT in the evaluation of primary gallbladder cancer(GBCa) was performed. All retrieved studies were reviewed. Pooled sensitivity and specificity of 18F-FDG PET or PET/CT in the evaluation of primary GBCa were calculated. The area under the summary receiving operator characteristics curve(AUC) was calculated to measure the accuracy of these methods. Sub-analyses considering the device used(PET vs PET/CT) were carried out.RESULTS: Twenty-one studies comprising 495 patients who underwent 18F-FDG PET or PET/CT for suspicious GBCa were selected for the systematic review. The meta-analysis of 13 selected studies provided the following results: sensitivity 87%(95%CI: 82%-92%),specificity 78%(95%CI: 68%-86%). The AUC was 0.88. Improvement of sensitivity and specificity was observed when PET/CT was used.CONCLUSION: 18F-FDG-PET and PET/CT demonstrated to be useful diagnostic imaging methods in the assessment of primary tumor in GBCa patients,nevertheless possible sources of false-negative and false-positive results should be kept in mind. PET/CT seems to have a better diagnostic accuracy than PET alone in this setting. | Salvatore Annunziata Daniele Antonio Pizzuto Carmelo Caldarella Federica Galiandro Ramin Sadeghi Giorgio Treglia | 2015 | World Journal of Gastroenterology2015，21，40： | 8 |
| 12 | Application of a collaborative modelling and strategic fuzzy decision support system for selecting appropriate resilience strategies for seaport operations显示文摘The selection of an appropriate resilience investment strategy to optimize the operational efficiency of a seaport is a challenging task given that many criteria need to be considered and modelled under an uncertain environment.The design of such a complex decision system consists of many subjective and imprecise parameters contained in different quantitative and qualitative forms.This paper proposes a fuzzy multi-attribute decision making methodology for the selection of an appropriate resilience investment strategy in a succinct and straightforward manner.The decision support model allows for a collaborative modelling of the system by multiple analysts in a group decision making process.Fuzzy analytical hierarchy process(FAHP) was utilized to analyse the complex structure of the system to obtain the weights of all the criteria while fuzzy technique for order of preference by similarity to ideal solution(TOPSIS) was employed to facilitate the ranking process of the resilience strategies.Given that it is often financially difficult to invest in all the resilience strategies,it is envisaged that the proposed approach could provide decision makers with a flexible and transparent tool for selecting appropriate resilience strategies aimed at increasing the resilience of seaport operations. | Andrew John Zaili Yang Ramin Riahi Jin Wang | 2014 | Journal of Traffic and Transportation Engineering(English Edition)2014，1，3： | 6 |
| 13 | Incidence and risk factors of retinopathy of prematurity and utility of the national screening criteria in a tertiary center in Iran显示文摘AIM: To determine the incidence and risk factors of retinopathy of prematurity(ROP) and the sensitivity of current screening criteria in a tertiary eye center in Tehran, Iran. METHODS: In a cross-sectional observational study, neonates weighing ≤2000 grams at birth or born <34 wk gestational age(GA) and all other infants at risk of ROP admitted to the neonatal intensive care unit(NICU) or referred to our ROP clinic were investigated. The incidence of ROP and severe ROP(i.e. patients needing treatment) were determined. The associations between risk factors and the development and severity of ROP were assessed. We also examined the sensitivity of the current national screening guideline in Iran. RESULTS: Among 207 infants, the incidence of ROP and severe ROP was 33.3% and 11.1%, respectively. Mean GA and birth weight(BW) were significantly lower in ROP vs non-ROP infants(29±2 wk vs 33±3 wk, P<0.001;1274±489 g vs 1916±550 g, P<0.001, respectively). Univariate analysis displayed significant association between ROP incidence and GA, BW, NICU admission period, blood transfusion, surfactant usage, sepsis, intraventricular hemorrhage and patent ductus arteriosus(P<0.05 for all). BW [relative risk(RR): 0.857(0.711-0.873), P<0.001], GA [RR: 0.788(0.711-0.873), P<0.001] and blood transfusion [RR: 1.888(0.995-3.583), P=0.052] were independent ROP risk factors. The sensitivity of country-specific screening guidelines was 95.7% and 100% for overall and severe ROP detection, respectively. CONCLUSION: ROP incidence is relatively high in Iran. Identifying ROP risk factors results in more accurate screening and reduces the risk of irreversible vision loss. The ROP screening criteria utilized in Iran are efficient at the present time. | Milad Khorshidifar Homayoun Nikkhah Alireza Ramezani Morteza Entezari NarsisDaftarian Hamid Norouzi Mansoor Shahiari Mitra Radfar Ramin Norinia Saeed Karimi | 2019 | International Journal of Ophthalmology(English edition)2019，12，8： | 6 |
| 14 | Microwave promoted rapid dehydration of aldoximes to nitriles using melamine-formaldehyde resin supported sulphuric acid in dry media显示文摘为由用在没有溶剂的状况下面的三聚氰胺甲醛树脂(MFR ) 上的支持的硫的酸的 aldoxime 的脱水的 nitriles 的合成的一个简单、方便的过程被开发了。许多芳香、脂肪族的 aldoximes 被变换成相应 nitriles。树脂为随后的反应被恢复并且再使用。 | Ramin Rezaei Marzeih Karami | 2011 | Chinese Chemical Letters2011，22，7： | 6 |
| 15 | Alkali-thermal gasification and hydrogen generation potential of biomass显示文摘 | Alexander B. Koven Shitang S. Tong Ramin R. Farnood Charles Q. Jia | 2017 | Frontiers of Chemical Science and Engineering2017，11，3： | 6 |
| 16 | Adhesive wear mechanisms uncovered by atomistic simulations显示文摘In this review, we discuss our recent advances in modeling adhesive wear mechanisms using coarse-grained atomistic simulations. In particular, we present how a model pair potential reveals the transition from ductile shearing of an asperity to the formation of a debris particle. This transition occurs at a critical junction size, which determines the particle size at its birth. Atomistic simulations also reveal that for nearby asperities, crack shielding mechanisms result in a wear volume proportional to an effective area larger than the real contact area. As the density of microcontacts increases with load, we propose this crack shielding mechanism as a key to understand the transition from mild to severe wear. We conclude with open questions and a road map to incorporate these findings in mesoscale continuum models. Because these mesoscale models allow an accurate statistical representation of rough surfaces, they provide a simple means to interpret classical phenomenological wear models and wear coefficients from physics-based principles. | Jean-Fran?ois MOLINARI Ramin AGHABABAEI Tobias BRINK Lucas FRéROT Enrico MILANESE | 2018 | Friction2018，6，3： | 6 |
| 17 | Distribution of different hepatitis C virus genotypes in patients with hepatitis C virus infection显示文摘AIM:To investigate the presence of mixed infection and discrepancy between hepatitis C virus(HCV) genotypes in plasma,peripheral blood mononuclear cells(PBMCs),and liver biopsy specimens.METHODS:From September 2008 up to April 2009,133 patients with chronic hepatitis C referred to Firouzgar Hospital for initiation of an antiviral therapy were recruited in the study.Five milliliters of peripheral blood was collected from each patient and liver biopsy was performed in those who gave consent or had indications.HCV genotyping was done using INNO-LiPATM HCV in serum,PBMCs,and liver biopsy specimens and then conf irmed by sequencing of 5'-UTR fragments.RESULTS:The mean age of patients was 30.3 ± 17.1 years.Multiple transfusion was seen in 124(93.2%) of patients.Multiple HCV genotypes were found in 3(2.3%) of 133 plasma samples,9(6.8%) of 133 PBMC samples,and 8(18.2%) of 44 liver biopsy specimens.It is notable that the different genotypes found in PBMCs were not the same as those found in plasma and liver biopsy specimens.CONCLUSION:Our study shows that a signif icant proportion of patients with chronic hepatitis C are affected by multiple HCV genotypes which may not be detectable only in serum of patients. | Farah Bokharaei Salim Hossein Keyvani Afsaneh Amiri Fatemeh Jahanbakhsh Sef idi Ramin Shakeri Farhad Zamani | 2010 | World Journal of Gastroenterology2010，16，16： | 5 |
| 18 | New trends in molecular and cellular biomarker discovery for colorectal cancer显示文摘Colorectal cancer(CRC) is the third leading cause of cancer death worldwide, which is consequence of multistep tumorigenesis of several genetic and epigenetic events. Since CRC is mostly asymptomatic until it progresses to advanced stages, the early detection using effective screening approaches, selection of appropriate therapeutic strategies and efficient follow-up programs are essential to reduce CRC mortalities. Biomarker discovery for CRC based on the personalized genotype and clinical information could facilitate the classification of patients with certain types and stages of cancer to tailor preventive and therapeutic approaches. These cancer-related biomarkers should be highly sensitive and specific in a wide range of specimen(s)(including tumor tissues, patients' fluids or stool). Reliable biomarkers which enable the early detection of CRC, can improve early diagnosis, prognosis, treatment response prediction, and recurrence risk. Advances in our understanding of the natural history of CRC have led to the development of different CRC associated molecular and cellular biomarkers. This review highlights the new trends and approaches in CRC biomarker discovery, which could be potentially used for early diagnosis, development of new therapeutic approaches and follow-up of patients. | Parisa Aghagolzadeh Ramin Radpour | 2016 | World Journal of Gastroenterology2016，22，25： | 5 |
| 19 | 等通道转角挤压及后续热处理参数对半固态7075铝合金显微组织的影响(英文)显示文摘研究等通道转角挤压(ECAP)及后续加热到半固态温度对7075铝合金显微组织的影响。7075铝合金的显微组织受ECAP道次、ECAP路径、后续加热温度和保温时间等参数的影响。采用实验及Taguchi法探讨上述参数对7075铝合金的微观特性包括晶粒尺寸及形状因子的影响。结果表明:5道次ECAP、路径BA及后续630°C等温处理15 min是合金获得半固态显微组织的较佳工艺条件;加工路径和保温时间对晶粒尺寸的影响最大,而ECAP道次和加热温度对晶粒尺寸的影响最小。形状因子受加工路径、保温时间和加热温度的影响较大,而受ECAP道次的影响较小。 | Ramin MESHKABADI Ghader FARAJI Akbar JAVDANI Vahid POUYAFAR | 2016 | Transactions of Nonferrous Metals Society of China2016，26，12： | 4 |
| 20 | Where long noncoding RNAs meet DNA methylation显示文摘 | Fan Lai Ramin Shiekhattar | 2014 | Cell Research2014，24，3： | 4 |
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