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Flow pattern analysis of linear gradient flow distribution

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Applied Mathematics and Mechanics(English Edition) 2015年第1期36卷 81-106页

作者： Da-ming LI Xiao-yu LI Yan-qing LI R.J.farahani School of Civil Engineering & Key Laboratory of Harbor & Ocean Engineering Ministry of Education Tianjin University Civil and Environmental Engineering Johns Hopkins University Civil Engineering The University of Adelaide

This paper uses the Oseen transformation to solve the differential equations governing motion of the vertical linear gradient flow distribution close to a wall surface. The Navier-Stokes equations are used to consider the inertia term along the flow direction. A novel contour integral method is used to solve the complex Airy function. The boundary conditions of linear gradient flow distribution for finite problems are determined. The vorticity function, the pressure function, and the turbulent velocity profiles are provided, and the stability of particle trajectories is studied. An Lx-function form of the third derivative circulation is used to to simplify the solution. Theoretical results are compared with the experimental measurements with satisfactory agreement.

关键词： linear gradient distribution flow contour integral stability analysis Airyfunction Oseen transformation

Nonlinear Free Vibration of Reinforced Skew Plates with SWCNs Due to Finite Strain

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Advances in Applied Mathematics and Mechanics 2018年第6期10卷 1344-1364页

作者： S.Jafari Mehrabadi S.M.Nodeh farahani Department of Mechanical Engineering Arak BranchIslamic Azad UniversityArakIran Department of Mechanical Engineering Kashan UniversityKashanIran

This paper is an attempt to investigate the nonlinear free vibration of skew plates reinforced by carbon nanotubes(CNTs)due to finite strain *** material properties of the nano-composite are estimated using the molecular dynamic results and the rule of ***,the differential equations governing the motions are derived on the basis of Classical Plate Theory(CPT)regarding the nonlinear Green-Lagrange strain *** order to solve the nonlinear equations,Galerkin’s method,Frechet derivative and differential quadrature method are *** effects of volume fraction of functionally graded materials(FGM),skew angle,distribution of CNTs and geometrical features of the plate on the nonlinear vibration of system have been *** results of this study have been compared with other researches and a good agreement has been achieved.

关键词： Finite strains nonlinear vibration skew plate carbon nanotubes functionally graded materials

Simplified microsatellite instability detection protocol provides equivalent sensitivity to robust detection strategies in Lynch syndrome patients

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Cancer Biology & Medicine 2017年第2期14卷 142-150页

作者： Hadi Babaei Mehrdad Zeinalian Mohammad Hassan Emami Mortaza Hashemzadeh Najmeh farahani Rasoul Salehi Department of Genetics and Molecular Biology School of MedicineIsfahan University of Medical Sciences Clinic of Gastrointestinal Diseases Poursina Hakim Research CenterIsfahan University of Medical Sciences Cellular and Molecular Research Center Shahrekord University of Medical Sciences

Objective:Germline mutations in mismatch repair(MMR)genes cause Lynch syndrome(LS).LS is an inherited disease,and an important consequence of MMR deficiency is microsatellite instability(MSI)*** phenotype influences the efficacy of5 fluorouracil(5-FU)***,cost effective,and easy to perform laboratory tests are required to include MSI detection in routine laboratory *** of CAT25 as monomorphic short tandem repeat sequence enables CAT25 to be an efficient screening tool among hereditary nonpolyposis colorectal cancer(HNPCC)patients compared with other methods used ***:Based on Amsterdam II criteria,31 patients in 31 families were shortlisted from a total number of 1,659 colorectal cancer *** status was examined in these patients using CAT25 and a commercially available Promega MSI five-markerbased detection system as well as immunohistochemical(IHC)staining of four important MMR *** were scored as high microsatellite instable(MSI-H),low(MSI-L),or stable(MSS).MSI status determined by CAT25 single mononucleotide marker was compared with that of five mononucleotide markers,Promega commercial kit,and IHC ***:MMR protein deficiency was observed on 7/31 probands using IHC methodology and 6/31 categorized as MSI-H using commercial kit or CAT25 single *** sensitivity and specificity of the CAT25 single marker were the same as those detected by five-marker Promega commercial kit in our ***:Based on our results,the performance of the CAT25 single mononucleotide marker for MSI status determination in our HNPCC patients is the same as that of the five-marker-based commercial kit.

关键词： Lynch syndrome HNPCC DNA mismatch repair IHC microsatellite instability

Identification of climatic and environmental factors associated with incidence of cutaneous leishmaniasis in Central Iran using satellite imagery

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Asian Pacific Journal of Tropical Biomedicine 2021年第1期11卷 40-46页

作者： Mohammad Javanbakht Abedin Saghafipour Keyvan Ezimand Amir Hamta Leyli Zanjirani farahani Nazanin Soltani Department of Remote Sensing and GIS Faculty of GeographyTehran UniversityTehranIran Department of Public Health Faculty of HealthQom University of Medical SciencesQomIran Department of Remote Sensing and GIS Faculty of Earth ScienceShahid Beheshti UniversityTehranIran Department of Social Medicine Faculty of Medical SciencesQom University of medical sciencesQomIran Department of Medical Parasitology and Mycology School of Public HealthTehran University of Medical SciencesTehranIran Student Research Committee Qom University of Medical SciencesQomIran

Objective:To determine the effect of climatic and environmental factors on the incidence of cutaneous leishmaniasis in Qom province in ***:In this cross-sectional study,the data on cutaneous leishmaniasis incidence were collected from the Disease Control and Prevention Center in Qom *** and environmental data including Normalized Difference Vegetation Index(NDVI),Land Surface Temperature(LST),and soil moisture were extracted using satellite *** of altitude and sunny hours were provided based on shuttle radar topography mission digital elevation model and hemispherical viewshed algorithm,*** associations of climatic and environmental variables with the incidence of the disease were analyzed by Pearson correlation *** Arc GIS 10.3 software was used to determine the geographical distribution of these ***:There were positive correlations between cutaneous leishmaniasis incidence and the two climatic factors:LST and sunny hours per day(P=0.041,P=0.016),and it had weak negative correlations with the digital elevation model(P=0.27),soil moisture(P=0.54),and NDVI(P=0.62).The time delay analysis showed that in one-,two-,and three month periods,the correlations increased with a 95%confidence ***,the correlation with the three-month time delay was positive and relatively strong between the cutaneous leishmaniasis incidence and LST and sunny hours(P=0.027,P=0.02);nevertheless,there were negative correlations between the cutaneous leishmaniasis incidence and the soil moisture(P=0.27)and NDVI(P=0.62).Conclusions:As Qom is located in one of the semi-arid climate zones,topography and solar energy are important factors affecting the incidence of cutaneous leishmaniasis in ***,appropriate disease control programs are recommended.

关键词： Environmental factors Incidence Satellite imagery Cutaneous leishmaniasis Iran

Some Topological Values of Supramolecular Chain of Different Complexes of N-Salicylidene-L-Valine

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Computer Modeling in Engineering & Sciences 2023年第8期136卷 1899-1916页

作者： Yonghong Liu Muhammad Waheed Umair Saleem Muhammad Kamran Jamil Muhammad Naveed Mohammad Reza farahani School of Computer Science Chengdu UniversityChengduChina Punjab School Education Department Govt Higher Secondary School Nangal Sahdan MuridkeSheikhupuraPakistan Muslim Model Girls Higher Secondary School Zafarwal NarowalPakistan Department of Mathematics Riphah International UniversityLahorePakistan School of Packaging Michigan State UniversityEast LansingUSA Department of Mathematics Iran University of Science and Technology(IUST)NarmakTehranIran

L-valine is a glycogen-type amino acid regarded among the necessary mammalian amino *** is an amino acid that is essential for protein synthesis.N-salicylidene-L-valine is gaining a lot of attention because of its unique structure and increased catalytic and cytotoxic *** explore the chain of supramolecular dialkyltin N-salicylidene-L-valine complexes 2,3,and 4 to learn more about this structure and its features regarding topological *** computed the first and second Randi′c index,harmonic index,sum-connectivity index,atom-bond-connectivity index,geometric arithmetic index and reduced reciprocal Randi′c index of Supramolecular Chain of Different Complexes of ***,we present an analysis of such structures using specific examples,as well as a comparison of topological indices.

关键词： Molecular compounds supramolecular chains topological indices

Invasive aspergillosis in liver transplant recipients, an infectious complication with low incidence but significant mortality

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World Journal of Transplantation 2023年第5期13卷 264-275页

作者： Azam farahani Fereshteh Ghiasvand Setareh Davoudi Zahra Ahmadinejad Department of Infectious Diseases Imam Khomeini Hospital ComplexTehran University of Medical SciencesTehran ***Iran Liver Transplantation Research Center Imam Khomeini Hospital ComplexTehran University of Medical SciencesTehran ***Iran

BACKGROUND Infections,including invasive fungal infections(IFIs),are among the leading causes of mortality in liver transplant recipients during the first year *** To investigate the epidemiology,clinical manifestations,risk factors,treatment outcomes,and mortality rate of post-liver transplantation invasive aspergillosis(IA).METHODS In this case-control study,22 patients with IA were identified by reviewing the archived and electronic medical records of 850 patients who received liver transplants at the Imam Khomeini Hospital complex in Tehran,Iran,between 2014 and *** control group comprised 38 patients without IA infection matched for age and *** information obtained included the baseline characteristics of liver transplant patients,operative reports,post-transplantation characteristics of both groups and information about the fungal infection of the patient *** The prevalence rate of IA among liver transplant recipients at Imam Khomeini Hospital was 2.7%.The risk factors of IA among studied patients included high serum creatinine levels before and post-transplant,renal replacement therapy,antithymocyte globulin induction therapy,post-transplant bile leakage,posttransplant hepatic artery thrombosis,repeated surgery within 30 d after the transplant,bacterial pneumonia before the aspergillosis diagnosis,receiving systemic antibiotics before the aspergillus infection,cytomegalovirus infection,and duration of post-transplant hospitalization in the intensive care *** most prevalent form of infection was invasive pulmonary aspergillosis,and the most common chest computed tomography scan findings were nodules,pleural effusion,and the halo *** the case group,prophylactic antifungal therapy was administered more frequently than in the control *** antifungal therapy response rate at 12 wk was 63.7%.The 3-and 12-mo mortality rates of the patients with IA were 36.4%and 45.4%,respectively(compared with the mortality rate o

关键词： Aspergillosis Cytomegalovirus infection Immunosuppression therapy Liver transplantation Risk factors Fungal infections Fungal pneumonia

Water storage variations of the Yangtze,Yellow,and Zhujiang river basins derived from the DEOS Mass Transport (DMT-1) model

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Science China Earth Sciences 2011年第5期54卷 667-677页

作者： ZHAO QiLe LIU XiangLin Pavel DITMAR Christian SIEMES Elena REVTOVA Hassan HASHEMI-farahani Roland KLEES Delft Institute of Earth Observation and Space Systems (DEOS) Faculty of Aerospace Engineering Delft University of Technology Kluverweg 1 2629 HS Delft the Netherlands GNSS Research Center Wuhan University Wuhan 430079 China

In general, China is short of water resources and some regions even experience a shortage of daily water supply. This could threaten the stability and economic development of the nation. A study on the water storage variations is especially important for the water management and storage prediction in three largest river basins of China, namely, Yangtze, Yellow, and Zhujiang, where the most dense population and leading economic regions are located. The satellite gravity mission GRACE （Gravity Recovery and Climate Experiment） provides an opportunity to macroseopically identify water （or mass） variations in the Earth＇s system with a spatial resolution of 300-400 km and a temporal resolution of about one month. We use the first release of the DEOS （Delft Institute of Earth Observation and Space Systems） Mass Transport （DMT-1） model based on GRACE data to analyze water storage changes in the three river basins. The DMT-1 model consists of monthly solutions, which are computed using an innovative methodology. The methodology includes, in particular, the application of a statistically optimal Wiener-type filter based on full varianee-covariance matrices of noise and signal. This results in particularly sharp mass variation maps. Taking one monthly solution as an example, we compare the results derived from the DMT-1 model with ones produced with the standard post-processing scheme based on a combination of the de-striping and Gaussian filtering. The comparison shows that the DMT-1 model outperforms the other models and is suitable for the analysis of the mass changes in river basins. A subset of the DMT-1 solutions in the interval between February 2003 and May 2008 is used to estimate the secular trends and seasonal variations for the three river basins. The estimated trends show that the water storage of the Yellow River basin does not have significant changes, while the Zhujiang and Yangtze river basins have a large and statistically significant water storage increase. T

关键词： GRACE DMT-1 water storage variation equivalent water layer thickness Yangtze-Yeilow-Zhujiang river basins secular and seasonal variation

Cost-effectiveness analysis of tele-retinopathy of prematurity screening in Iran

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International Journal of Ophthalmology(English edition) 2021年第4期14卷 560-566页

作者： Seyed-Farzad Mohammadi Ameneh Rahban Sahel Darabeigi Nastaran Salimi Afsar farahani Alireza Lashay Cyrus Alinia Translational Ophthalmology Research Center Farabi Eye HospitalTehran University of Medical SciencesTehran ***Iran Department of Health Management and Economics School of Public HealthUrmia University of Medical SciencesUrmia 571478334Iran

AIM:To conduct a cost-utility analysis of the teleretinopathy of prematurity(ROP)screening program against no ***:A decision tree model was developed to identify and treat the infants with threshold ROP through the tele-screening system compared with no screening program from the societal *** used the quality adjusted life years(QALY)index to measure the scenarios’effectiveness,which was discounted for the future years by *** hundred twenty-six randomly selected newborns with ROP required treatment were investigated to extract the treatment *** considered the direct medical and non-medical costs in cost calculations analysed by the bottom-up *** figures of the model’s inputs were calculated using the Monte Carlo simulation that generated 1000 random iteration of the data,and a one-way sensitivity analysis was performed on the model to cope with the potential ***:The total and per capita needed the budget to establish a tele-ROP screening system were estimated at over 1.5 million and 35.13 USD,*** total cost of identifying and treating an ROP case in tele-screening and no screening strategies were obtained as 108.72 and 63.52 USD,respectively,and their lifetime discounted QALY gained were calculated as 15.39 and 15.11,***,incremental cost-effectiveness ratio(ICER)of tele-screening strategy against the competitive strategy was achieved as 161.43 ***:Tele-ROP screening program is one of the most cost-effective interventions in the Iranian health system and has a high priority to receive a budget for implementation.

关键词： cost-utility analysis incremental cost-effectiveness ratio quality adjusted life years tele-retinopathy of prematurity

Statistical Properties of Aftershocks for Ahar-Varzeghan Twin Earthquakes on 11 August 2012, NW Iran, and Investigation of Seismicity of North Tabriz Fault

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International Journal of Geosciences 2018年第2期9卷 106-118页

作者： Jamileh Vasheghani farahani Institute of Geophysics University of Tehran Tehran Iran

Two earthquakes occurred on 11 August 2012 in East Azerbaijan province, NW Iran with Mw 6.3 at 12:23:15.9 and Mw 6.1;11 minutes after the first shock at 12:34:34.8 GMT time. In this study, we concentrated on the properties of the aftershock sequences in a duration of 7.5-month time-period data after the main shocks, recorded by Broadband Iranian Network (BIN). We obtained p, c and K parameters with the maximum likelihood method and the occurrence rate was modeled by the modified Omori formula. Besides, we showed that aftershocks of the aftershock in 7 Nov. 2012 (M = 5.6) also decay according to the modified Omori law. We investigated the spatial and temporal variations of b-values before and after the twin earthquakes with Mw 6.3 and Mw 6.1 approximately 20 km around North Tabriz Fault (NTF) in the region from 1996 to 2013 using Iranian Seismological Center (IRSC). We believed that a research of the past 17 years has clearly established that spatial b-value changes and seismicity rate are highly significant and meaningful. Moreover, our research led to a warning for a probable strong motion along NTF for the coming couple of years.

关键词： Ahar-Varzeghan Twin Earthquakes Aftershocks B-Value Modified Omori Law Azerbaijan Province