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| 1 | Al6013/Mg搅拌摩擦焊接的材料流动及相变(英文)显示文摘研究搅拌摩擦焊接铝合金6013和纯镁板在接头界面处的材料流动及相变。将铝合金6013和纯镁板分别放置在焊缝的前进侧和返回侧,搅拌针放在焊缝中央偏向铝合金侧1mm处,可以获得无缺陷的焊缝。为了研究搅拌摩擦焊时材料流动情况,将钢丸嵌入焊接材料中作为示踪材料,焊接完成后,采用X射线分析钢丸在材料中的位置。结果表明,嵌在前进侧材料中的钢丸焊后进入了返回侧材料中,而嵌在返回侧材料中的钢丸仍留在返回侧中。对焊接试样进行热处理,研究热处理对焊接接头力学性能的影响和接头处金属间化合物层的生成情况。结果表明,在接头界面处生成了2种金属间化合物:Al3Mg2和Al12Mg17。 | Pooya POURAHMAD Mehrdad ABBASI | 2013 | Transactions of Nonferrous Metals Society of China2013，23，5： | 16 |
| 2 | Aerodynamic drag reduction of heavy vehicles using append devices by CFD analysis显示文摘Improving vehicle fuel consumption,performance and aerodynamic efficiency by drag reduction especially in heavy vehicles is one of the indispensable issues of automotive industry.In this work,the effects of adding append devices like deflector and cab vane corner on heavy commercial vehicle drag reduction were investigated.For this purpose,the vehicle body structure was modeled with various supplementary parts at the first stage.Then,computational fluid dynamic(CFD) analysis was utilized for each case to enhance the optimal aerodynamic structure at different longitudinal speeds for heavy commercial vehicles.The results show that the most effective supplementary part is deflector,and by adding this part,the drag coefficient is decreased considerably at an optimum angle.By adding two cab vane corners at both frontal edges of cab,a significant drag reduction is noticed.Back vanes and base flaps are simple plates which can be added at the top and side end of container and at the bottom with specific angle respectively to direct the flow and prevent the turbulence.Through the analysis of airflow and pressure distribution,the results reveal that the cab vane reduces fuel consumption and drag coefficient by up to 20 % receptively using proper deflector angle.Finally,by adding all supplementary parts at their optimized positions,41% drag reduction is obtained compared to the simple model. | Mehrdad khosravi Farshid Mosaddeghi Majid Oveisi Ali Khodayari Bavil | 2015 | Journal of Central South University2015，22，12： | 15 |
| 3 | CFD-DEM study of effect of bed thickness for bubbling fluidized beds显示文摘The effect of bed thickness in rectangular fluidized beds is investigated through the CFD-DEM simula- tions of small-scale systems. Numerical results are compared for bubbling fluidized beds of various bed thicknesses with respect to particle packing, bed expansion, bubble behavior, solids velocities, and particle kinetic energy. Good two-dimensional (2D) flow behavior is observed in the bed having a thickness of up to 20 particle diameters. However, a strong three-dimensional (3D) flow behavior is observed in beds with a thickness of 40 particle diameters, indicating the transition from 2D flow to 3D flow within the range of 20-40 particle diameters. Comparison of velocity profiles near the walls and at the center of the bed shows significant impact of the front and back walls on the flow hydrodynamics of pseudo-2D fluidized beds. Hence, for quantitative comparison with experiments in pseudo-2D columns, the effect of walls has to be accounted for in numerical simulations. | Tingwen Li Pradeep Gopalakrishnan Rahul Garg Mehrdad Shahnam | 2012 | Particuology2012，10，5： | 14 |
| 4 | On the nature of tip clearance flow in subsonic centrifugal impellers显示文摘Increasing demand for downsizing of engines to improve CO2 emissions has resulted in renewed efforts to improve the efficiency and expend the stable operating range of the centrifugal compressors used in petro-chemical equipment and turbochargers. The losses in these compressors are dominated by tip clearance flow. In this paper, the tip clearance flow in the subsonic impeller is numerically investigated. The nature of the tip clearance in inducer, axial to radial bend and exducer are studied in detail at design and off-design conditions by examining the detailed flow field through the clearance and the interaction of the clearance flow with the shear effect with the endwalls. The correlation between blade loading and span wise geometry and clearance flow at different locations are presented. | LIU ZhengXian PING Yan ZANGENEH Mehrdad | 2013 | Science China(Technological Sciences)2013，56，9： | 9 |
| 5 | Obstructive jaundice in Iran:factors affecting early outcome显示文摘BACKGROUND:Understanding any factors which influence the morbidity and mortality in patients with obstructive jaundice in each society will better guide appropriate management and lead to improved survival This study aimed to assess baseline etiologies,clinical manifestations,diagnostic results,and morbidity and mortality related to obstructive jaundice in Iranian patients. METHODS:The hospital recorded files of 133 patients with the final diagnosis of obstructive jaundice who had been admitted to the Taleqhani Hospital in Tehran between January 2001 and September 2004 were reviewed. RESULTS:The most common etiologies of obstructive jaundices were neoplasia and then common bile duct stone in the two genders.The results of ultrasonography were positive in less than half of the patients.However,the most positive results were related to endoscopic retrograde cholangiopancreatography(ERCP).The in-hospital mortality rate in patients less than 50 years old and elderly patients was 0%and 6.76%,respectively.The in-hospital morbidity rate was 2.25%and 7.51%,respectively in both patients and it was commonly related to infection of ulcer (44.46%),pneumonia(14.75%),myocardial infarction (14.75%),and subdiaphragmatic abscess(11.29%).In patients with a diagnosis of benign obstruction,only one patient died of severe sepsis.In malignant group preoperative characteristics,such as weight loss(P=0.015) and serum bilirubin concentration more than 16 mg/dl and postoperative complications,such as sepsis(P<0.001) cardiac arrest(P<0.001),and hepatic coma(P<0.001)were main predictors for the in-hospital mortality rate.CONCLUSION:Although the mortality and morbidity of obstructive jaundice in our study are less than those in other studies,the determination of preoperative clinical and laboratory indices and postoperative complications of patients is needed for the control of mortality and morbidity rate. | Mehrdad Moghimi Seyed Ali Marashi Mohammad Taghi Salehian Mehrdad Sheikhvatan | 2008 | Hepatobiliary & Pancreatic Diseases International2008，7，5： | 9 |
| 6 | Pharmacokinetics and pharmacodynamics of lignocaine: A review显示文摘Lignocaine is an essential drug on World Health Organisation essential drug list, considered efficacious, safe and cost-effective for any health-care system. Despite its ubiquitous use in medicine and surgery, there are few detailed reviews of its pharmacokinetics and pharmacodynamics. Being an amide-type local anesthetic and Class 1b antiarrhythmic, lignocaine is most frequently used clinically for its anesthetic and antiarrhythmic benefits. However, lignocaine has important antinociceptive, immuno-modulating, and antiinflammatory properties. Information pertaining to the pharmacokinetics and pharmacodynamics of lignocaine was examined by performing a literature search of Pub Med, Embase and MEDLINE(via Ovid), pharmacology textbooks and online sources. We present a focused synopsis of lignocaine's pharmacological composition, indications for use and mechanisms of action, focusing on its anti-inflammatory, immuno-modulating and analgesia effects. In addition we review the dosing regimes and infusion kinetics of lignocaine in the clinical setting. Finally, we review the evidence for ligocaine's modulation of the inflammatory response during major surgery and its specific effects on cancer recurrence. These indirect effects of local anesthetics in tumor development may stem from the reduction of neuroendocrine responses to the stress response elicited by major surgery and tissue damage, enhanced preservation of immune-competence, in addition to opioid-sparing effects of modulating tumor growth. | Laurence Weinberg Benjamin Peake Chong Tan Mehrdad Nikfarjam | 2015 | World Journal of Anesthesiology2015，4，2： | 9 |
| 7 | 车载电源性能测试平台驱动电机调速系统控制策略研究显示文摘纯电动汽车电源性能测试平台是研究电动汽车综合性能的必备条件。为研究纯电动汽车电源性能,提出由直流电机-飞轮组成的车载电源性能测试方案,直流电机用来模拟电动汽车驱动电机,飞轮用来模拟电动汽车的负载和惯量。建立了驱动电机直流调速系统的控制模型,运用Simulink和Psim软件对驱动电机的直流调速系统进行联合仿真,分析并比较了PID控制和模糊-PID控制两种控制策略下驱动电机的直流调速效果;建立了基于dSPACE的车载电源性能测试硬件在环测试平台,以简单循环工况为直流调速系统的参考转速,通过实验对两种控制策略下的仿真结果进行了实验验证。仿真和实验结果均表明模糊-PID控制策略在控制精度和动态性能方面优于PID控制策略。 | 李勇 马飞 KAZERANI Mehrdad | 2014 | 中国电机工程学报2014，34，21： | 8 |
| 8 | Smartphones,tele-ophthalmology,and VISION 2020显示文摘Telemedicine is an emerging field in recent medical achievements with rapid development.The 'smartphone' availability has increased in both developed and developing countries even among people in rural and remotes areas.Telebased services can be used for screening ophthalmic diseases and also monitoring patients with known diseases.Electronic ophthalmologic records of the patients including captured images by smartphones from anterior and posterior segments of the eye will be evaluated by ophthalmologists,and if patients require further evaluations,they will be referred to experts in the relevant field.Eye diseases such as cataract,glaucoma,age-related macular degeneration,diabetic retinopathy,and retinopathy of prematurity are the most common causes of blindness in many countries and beneficial use of teleophthalmology with smartphones will be a good way to achieve the aim of VISION 2020 all over the world.Numerous studies have shown that teleophthalmology is similar to the conventional eye care system in clinical outcomes and even provides more patient satisfaction as it saves time and cost.This review explains how teleophthalmology helps to improve patient outcomes through smartphones. | Mehrdad Mohammadpour Zahra Heidari Masoud Mirghorbani Hassan Hashemi | 2017 | International Journal of Ophthalmology(English edition)2017，10，12： | 8 |
| 9 | Effect of sex and rearing system on the quality and mineral content of fiber from raeini cashmere goats显示文摘The aim of this study was to compare the quality characteristics and mineral content of the fiber from male and female cashmere goats raised under different management systems. Male and female Raeini cashmere goats (<1.5 years of age, n = 48) were selected from flocks raised at a government breeding station or raised commercially under either rural or nomadic conditions. The staple length, cashmere fiber diameter, coefficient of variation for fiber diameter, percentage of cashmere in a fleece, percentage of guard hair in a fleece and cashmere tenacity averaged 4.6 ±0.1 cm, 18.0 ±0.1 m, 20.9 ± 0.4%, 66.1 ± 1.5%, 33.8 ± 1.5% and 1.8 ± 0.2 gf/tex, respectively. The sulfur, copper and zinc content of the cashmere averaged 2.8 ± 0.1%, 0.00065 ± 0.00002% and 0.01276 ± 0.00025%, respectively. Rearing method significantly affected staple length, coefficient of variation of fiber diameter, cashmere tenacity and copper content. Males had a higher coefficient of variation of fiber diameter and cashmere tenacity than females (P < 0.05). | Mehrdad Shamsaddini-Bafti Mahnaz Salehi Ali Maghsoudi Ali Mostafa Tehrani Farhad Mirzaei Syed Mojtaba Syed Momen | 2012 | Journal of Animal Science and Biotechnology2012，3，3： | 7 |
| 10 | p21-activated kinase signalling in pancreatic cancer: New insights into tumour biology and immune modulation显示文摘Pancreatic cancer is one of the most aggressive and lethal malignancies worldwide, with a very poor prognosis and a five-year survival rate less than 8%. This dismal outcome is largely due to delayed diagnosis, early distant dissemination and resistance to conventional chemotherapies. Kras mutation is a well-defined hallmark of pancreatic cancer, with over 95% of cases harbouring Kras mutations that give rise to constitutively active forms of Kras. As important down-stream effectors of Kras, p21-activated kinases(PAKs) are involved in regulating cell proliferation, apoptosis, invasion/migration and chemo-resistance. Immunotherapy is now emerging as a promising treatment modality in the era of personalized anti-cancer therapeutics. In this review, basic knowledge of PAK structure and regulation is briefly summarised and the pivotal role of PAKs in Kras-driven pancreatic cancer is highlighted in terms of tumour biology and chemoresistance. Finally, the involvement of PAKs in immune modulation in the tumour microenvironment is discussed and the potential advantages of targeting PAKs are explored. | Kai Wang Graham S Baldwin Mehrdad Nikfarjam Hong He | 2018 | World Journal of Gastroenterology2018，24，33： | 7 |
| 11 | Polyp detection rate and pathological features in patients undergoing a comprehensive colonoscopy screening显示文摘AIM To identify the prevalence, and clinical and pathologic characteristic of colonic polyps among Iranian patients undergoing a comprehensive colonoscopy, and determine the polyp detection rate(PDR) and adenoma detection rate(ADR).METHODS In this cross-sectional study, demographics and epidemiologic characteristics of 531 persons who underwent colonoscopies between 2014 and 2015 at Mehrad gastrointestinal clinic were determined. Demographics, indication for colonoscopy, colonoscopy findings, number of polyps, and histopathological characteristics of the polyps were examined for each person.RESULTS Our sample included 295(55.6%) women and 236(44.4%) men, with a mean age of 50.25 ± 14.89 years. Overall PDR was 23.5%(125/531). ADR and colorectal cancer detection rate in this study were 12.8% and 1.5%, respectively. Polyps were detected more significantly frequently in men than in women(52.8% vs 47.2%, P < 0.05). Polyps can be seen in most patients after the age of 50. The average age of patients with cancer was significantly higher than that of patients with polyps(61.3 years vs 56.4 years, P < 0.05). The majority of the polyps were adenomatous. More than 50% of the polyps were found in the rectosigmoid part of the colon.CONCLUSION The prevalence of polyps and adenomas in this study is less than that reported in the Western populations. In our patients, distal colon is more susceptible to developing polyps and cancer than proximal colon. | Hamid Asadzadeh Aghdaei Ehsan Nazemalhosseini Mojarad Sara Ashtari Mohmad Amin Pourhoseingholi Vahid Chaleshi Fakhrosadat Anaraki Mehrdad Haghazali Mohammad Reza Zali | 2017 | World Journal of Gastrointestinal Pathophysiology2017，8，1： | 6 |
| 12 | Challenging loop-mediated isothermal amplification(LAMP) technique for molecular detection of Toxoplasma gondii显示文摘Objective:To compare analytical sensitivity and specificity of a newly described DNA amplification technique.LAMP and nested PCR assay targeting the RE and Bl genes for the detection of Toxoplasma gondii(T.gondii) DNA.Methods:The analytical sensitivity of LAMP and ncstcd-PCR was obtained against 10-fold serial dilutions of T.gondii DNA ranging from 1 ng to 0.01 fg.DNA samples of other parasites and human chromosomal DNA were used to determine the specificity of molecular assays.Results:After testing LAMP and nesled-PCR in duplicate,the detection limit of RE-LAMP.B1-LAMP,RE-nested PCR and B1-nested PCR assays was one fg.100 fg,1 pg and 10 pg of T.gondii DNA respectively.All the LAMP assays and nested PCRs were 100% specific.The RE-LAMP assay revealed the most sensitivity for the detection of T.gondii DNA.Conclusions:The obtained results demonstrate that the LAMP technique has a greater sensitivity for detection of T.gondii.Furthermore,these findings indicate that primers based on the RE are more suitable than those based on the B1 gene.However,the B1-LAMP assay has potential as a diagnostic tool for detection of T.gondii. | Shirzad Fallahi Zahra Arab Mazar Mehrdad Ghasemian Ali Haghighi | 2015 | Asian Pacific Journal of Tropical Medicine2015，8，5： | 6 |
| 13 | 搅拌铸造法制备AA2024−TiO2纳米复合材料显示文摘考虑到在非原位铸造法制备复合材料时不使用TiO2纳米颗粒作为AA2024合金的增强相,采用搅拌铸造法制备AA2024−x%TiO2(np)(x=0,0.5%,1%,体积分数)纳米复合材料。利用光学显微镜和扫描电子显微镜研究样品的结构性能,并采用硬度和拉伸试验研究其力学性能。结果表明,添加1%TiO2(体积分数)纳米颗粒后,样品的晶粒尺寸和枝晶臂间距分别减小约66%和31%;硬度、抗拉强度、屈服强度和伸长率分别提高约25%、28%、4%和163%。在拉伸试样的断口表面观察到团聚在基体中的纳米颗粒。纳米复合材料结构中纳米颗粒的团聚是其强度在强化机制下减弱的因素。 | Mehrdad SHAYAN Beitallah EGHBALI Behzad NIROUMAND | 2020 | Transactions of Nonferrous Metals Society of China2020，30，11： | 6 |
| 14 | Combination of thrombolytic therapy and angioplastic stent insertion in a patient with Budd-Chiari syndrome显示文摘A 31-year-old female who had well-established polycythemia vera one year before, presented with the sudden onset. She had severe ascites and hepatic encephalopathy 12 d prior to admission. Real-time ultrasonography revealed a supra hepatic thrombosis extending toward the inferior vena cava (lVC). Thrombolytic therapy with systemic streptokinase (250 000 IU loading + 100 000 IU/h infusion) was started. At the end of 72 h infusion, the patient's general condition improved. A color Doppler ultrasonography then showed complete and partial resolution of the thrombosis in the supra hepatic vein and IVC, respectively. Despite this good response, 12 d later, the symptoms recurred. Venography detected complete obstruction of the lVC. Percutanous balloon angioplasty with stent insertion was performed successfully and the patient was discharged without any evidence of liver disease. A combination of systemic streptokinase and radiological intervention was effective in our patient. | Fatemi Reza Daryani E Naser Ganaati Hossein Zahmatkesh Mehrdad | 2007 | World Journal of Gastroenterology2007，13，27： | 6 |
| 15 | IL-33, an Interleukin-1-like Cytokine that Signals via the IL-1 Receptor-Related Protein ST2 and Induces T Helper Type 2-Associated Cytokines显示文摘 | Jochen Schmitz Alexander Owyang Elizabeth Oldham Yaoli Song Erin Murphy Terril K. McClanahan Gerard Zurawski Mehrdad Moshrefi Jinzhong Qin Xiaoxia Li Daniel M. Gorman J. Fernando Bazan Robert A. Kastelein | 2005 | Immunity2005，，5： | 6 |
| 16 | Evaluation of kefir as a potential probiotic on growth performance,serum biochemistry and immune responses in broiler chicks显示文摘This experiment was conducted to evaluate the effect of milk or molasses kefir as a probiotic on growth performance, carcass traits, serum biochemistry and humoral immune responses in broiler chickens. A total of 192 one-d-old as hatched broiler chicks(Ross 308) were randomly allotted to 4 treatments, each with 4 replicate pens of 12 chicks. The following treatments were applied: 1) a basal diet(C) and normal drinking water, 2) 2% milk kefir in drinking water, 3) 2% molasses kefir in drinking water, and 4) the diet C supplemented with commercial probiotic. At d 42, eight birds per treatment were killed for determination of carcass traits. Broilers at 28 days of age were bled for measuring antibody titers against Newcastle disease virus(NDV) and avian influenza virus(AIV), at 30 days of age for antibody titers against sheep red blood cell(SRBC), and at 42 days of age for biochemical analysis. Supplementing 2%milk kefir increased body weight of broilers at 28 and 42 days of age(P < 0.05). Supplementing 2%molasses kefir improved feed conversation ratio(FCR) of broilers during growth period(P < 0.05), but FCR of broilers in other periods was not affected. Daily feed intake, internal organ weights, and carcass traits were not influenced by the treatments except for small intestine and ceca length. Small intestinal length significantly decreased in broilers supplemented with milk and molasses kefir(P < 0.05). Molasses kefir supplementation significantly(P < 0.05) increased antibody titer against SRBC at 31 days of age but other immune related parameters were not statistically different among treatments. Biochemical parameters including serum protein, albumin, and triglyceride concentrations were not statistically(P> 0.05) influenced. Broilers supplemented with molasses kefir, had a significantly lower concentration of serum total cholesterol, low density lipoprotein cholesterol and elevated high density lipoprotein cholesterol at 42 days of age(P < 0.05). In conclusion, the results indicated that inclusion of 2% milk kefir in drinking water would improve growth performance of broiler chickens. | Majid Toghyani Seyed kazem Mosavi Mehrdad Modaresi Nasir Landy | 2015 | Animal Nutrition2015，，4： | 6 |
| 17 | Weldability of Ferritic Ductile Cast Iron Using Full Factorial Design of Experiment显示文摘The weldability of a ferritic ductile cast iron was investigated as a function of different consumables and welding conditions.A 23 full factorial experimental design was used to analyze the effect of factors and their interactions on ultimate tensile strength of weldments.The shielded metal arc welding(SMAW)process was used with two types of consumables(E7018and ENi-CI)under eight different conditions using as-cast samples.The microstructural evolution and fracture mechanisms were investigated by optical microscopy and scanning electron microscopy(SEM),respectively.The hardness,tensile and impact tests were also performed to determine the weld quality.Based on experiment design,preheat,consumable,cooling condition,preheat-cooling and preheat-consumable interactions were significant factors.Preheat is the most effective factor and in the case of E7018,preheat and cooling conditions were the most sensible factors.It was found that buttering was the most appropriate welding method for ferritic ductile cast iron. | Mohsen Askari-Paykani Mehrdad Shayan Morteza Shamanian | 2014 | Journal of Iron and Steel Research(International)2014，21，2： | 5 |
| 18 | Multi-terminal VSC HVDC for the European supergrid: Obstacles显示文摘 | Dirk Van Hertem Mehrdad Ghandhari | 2010 | Renewable and Sustainable Energy Reviews2010，，9： | 5 |
| 19 | Leaf macro-and micro-morphological altitudinal variability of Carpinus betulus in the Hyrcanian forest (Iran)显示文摘We investigated the altitudinal variation of Carpinus betulus L. in the Hyrcanian forest using leaf macro-morphological and micro-morphological traits. We collected a total of 1600 leaves from two locations. In each location, we sampled six populations along an altitudinal gradient ranging from 100 m to 1,150 m. We found that trees in the higher elevations have smaller leaf lamina than those in the lower elevations. In contrast, leaf mass per area was high at low altitudes and increased newly at the higher ones. Stomatal dimension was negatively correlated with elevation, while stomatal density was positively correlated with elevation. We also found that two transects showed the same plasticity trend. Leaf area showed the highest plasticity, while the number of veins showed the lowest plasticity. This study shows that altitude, and related temperature and rainfall, represents an important driving force in Carpinus betulus leaf morphological variation. Moreover, our results suggest that leaf area, leaf mass per area and stomatal density could influence the species responses to different ecological conditions. | Iman Chapolagh Paridari Seyed Gholamali Jalali Ali Sonboli Mehrdad Zarafshar Piero Bruschi | 2013 | Journal of Forestry Research2013，24，2： | 4 |
| 20 | Hybrid intelligent water drop bundled wavelet neural network to solve the islanding detection by inverter-based DG显示文摘在这份报纸,被动 neuro 小浪为连接格子的转换基于基于 islanding 察觉技术分布式的产生被开发。神经网络的重量参数被聪明的水落下(IWD ) 优化处于建议问题改进建议技术的能力。建议方法利用并且联合小浪分析和人工的神经网络(ANN ) 检测 islanding。到分发网络的连接分布式的生成器有象增加格子的电容并且提高功率质量那样的许多好处。然而,它产生许多问题。这主要由于在任何产生单位外面,分发网络在那水平被设计的事实。因此,把分布式的发电机集成到存在分发网络不是没有问题的。非故意的 islanding 是遇到的问题之一。分离小浪变换(DWT ) 能够把信号分解成不同频率乐队。它能在从获得的电压信号提取歧视的特征被利用。在有一个大非察觉地区(NDZ ) 的被动计划,担心由于它的降级的力量质量效果在活跃方法上被提起了。建议计划的主要强调是把 NDZ 归结为尽可能近并且到使产量力量质量未改变。从 Matlab/Simulink 的模拟结果证明建议方法有一个小非察觉地区,并且能够在最小的标准时间以内精确地检测 islanding。 | Mehrdad TARAFDAR HAGH Homayoun EBRAHIMIAN Noradin GHADIMI | 2015 | Frontiers in Energy2015，9，1： | 4 |
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