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Predict Edges in Fliker Social Network Using Data Mining Method

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Intelligent Information Management 2012年第3期4卷 60-65页

作者： amir hossein Rasekh Zeinab Liaghat Ala Mahdavi Sharif University of Technology Tehran Iran Young Researchers Club Sepidan Branch Islamic Azad University Sepidan Iran Young Researchers Club Shiraz Branch Islamic Azad University Shiraz Iran

Using social networking services is becoming more popular day by day. The websites of the social networks like face-book currently are among the most popular internet services just after giant portals such as Yahoo, MSN and search engines like Google. One of the main problems in analyzing these networks is the prediction of relationships between people in the network. The purpose of this paper is to forecast the friendship of a person with a new person using existing data on Flickr website accurately. In this paper, we achieved about 90% percent correct prediction with regards to the results which are obtained by using data mining methods.

关键词： Social Network Data Mining Link Prediction Regression

<i>Helicobacter pylori</i>microbe and detecting with data mining algorithms

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Open Journal of Gastroenterology 2013年第2期3卷 93-98页

作者： amir hossein Rasekh Zeinab Liaghat Alireza Tabebordbar Computer Science and Engineering Department Shiraz University Shiraz Iran

Nowadays medicines believe that the only definite method to diagnose the existence of Helicobacter pylori microbe is performing endoscope, however it’s painful and insufferable for young children. Thus in this paper we used data mining algorithms to diagnose the existence of this microbe and eventually we succeeded in predicting the existence of this bacterium in stomach that guides medicines to perform Endoscopy just in cases where percentage of finding this bacterium is high.

关键词： Data Mining Helicobacter pylori Regression RBF Network Part

Effects of Fillerwire Composition along with Different Pre- and Post-Heat Treatment on Mechanical Properties of AISI 4130 Welded by the GTAW Process

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Materials Sciences and Applications 2010年第3期1卷 135-140页

作者： Ali Emamian Ardalan Emamian amir hossein Kowkabi 不详

This research intends to find out the optimal mechanical properties of AISI 4130 steel welded by the GTAW process. Six test plates were joined by two types of filler wire with similar chemical composition to the base metal, and with lower carbon content and slightly higher alloy elements content compared to the first one. Test plates then exerted three different pre-heat and post-heat treatments on both groups. The three types of heat treatments were alternatively without pre-heat and post-heat, with pre-heat only, and finally with pre-heat and post-heat. Tensile, side bends and impact tests (for weld zone and HAZ) have been conducted. Results show that using low-carbon filler wire along with pre- and post-heat resulted in outstanding mechanical properties.

关键词： HAZ (Heat Affected Zone) Filler Wire Pre- and Post-heat Treatments GTAW Process

Interventions of natural and synthetic agents in inflammatory bowel disease, modulation of nitric oxide pathways

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World Journal of Gastroenterology 2020年第24期26卷 3365-3400页

作者： Aida Kamalian Masoud Sohrabi Asl Mahsa Dolatshahi Khashayar Afshari Shiva Shamshiri Nazanin Momeni Roudsari Saeideh Momtaz Roja Rahimi Mohammad Abdollahi amir hossein Abdolghaffari Department of Medicine Tehran University of Medical SciencesTehran ***Iran Students'Scientific Research Center Tehran University of Medical SciencesTehran ***Iran Department of Traditional Pharmacy School of Persian MedicineTehran University of Medical SciencesTehran ***Iran Department of Toxicology and Pharmacology Faculty of PharmacyTehran Medical SciencesIslamic Azad UniversityTehran ***Iran Medicinal Plants Research Center Institute of Medicinal PlantsACECRTehran ***Iran Toxicology and Diseases Group(TDG) Pharmaceutical Sciences Research Center(PSRC)The Institute of Pharmaceutical Sciences(TIPS)and Department of Toxicology and PharmacologySchool of PharmacyTehran University of Medical SciencesTehran ***Iran Gastrointestinal Pharmacology Interest Group Universal Scientific Education and Research NetworkTehran ***Iran Department of Toxicology and Pharmacology Faculty of PharmacyTehran University of Medical SciencesTehran ***Iran

Inflammatory bowel disease(IBD)refers to a group of disorders characterized by chronic inflammation of the gastrointestinal(GI)*** elevated levels of nitric oxide(NO)in serum and affected tissues;mainly synthesized by the inducible nitric oxide synthase(iNOS)enzyme;can exacerbate GI inflammation and is one of the major biomarkers of GI *** natural and synthetic agents are able to ameliorate GI inflammation and decrease iNOS expression to the extent comparable with some IBD ***,the purpose of this study was to gather a list of natural or synthetic mediators capable of modulating IBD through the NO *** databases including Google Scholar and PubMed were searched from 1980 to May *** found that polyphenols and particularly flavonoids are able to markedly attenuate NO production and iNOS expression through the nuclear factorκB(NF-κB)and JAK/STAT signaling *** and probiotics can also alter the GI microbiota and reduce NO expression in IBD models through a broad array of mechanisms.A number of synthetic molecules have been found to suppress NO expression either dependent on the NF-κB signaling pathway(i.e.,dexamethasone,pioglitazone,tropisetron)or independent from this pathway(i.e.,nicotine,prednisolone,celecoxib,β-adrenoceptor antagonists).Co-administration of natural and synthetic agents can affect the tissue level of NO and may improve IBD symptoms mainly by modulating the Toll like receptor-4 and NF-κB signaling pathways.

关键词： Inflammatory bowel disease Ulcerative colitis Crohn’s disease Nitric oxide Nuclear factor-κB Natural or synthetic mediators

Effect of hemovigilance education on nursing students’knowledge:the application of a conceptual map

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Frontiers of Nursing 2022年第3期9卷 295-301页

作者： Mohammad Behnammoghadam Zahra Fazelniya amir hossein Bayat Abdolhadi Jahanfar Mohammad Saeed Mirzaee Sobhan Mirzaee Allahyar Shahnavazi Zeinab Mahmoudi School of Nursing Yasuj University of Medical SciencesIsfahanYasuj ***Iran Department of Nursing Yasuj BranchIslamic Azad UniversityYasuj ***Iran School of Nursing and Midwifery Saveh University of Medical SciencesSavehSaveh ***Iran Student Research Committee Yasuj University of Medical SciencesYasujYasuj ***Iran Nursing Management Department School of Nursing and MidwiferyIran University of Medical SciencesTehranTehran ***Iran Department of Nursing School of MedicineIranshahr University of Medical SciencesIranshahrIranshahr ***Iran School of Nursing Yasuj University of Medical SciencesYasujYasuj ***Iran

Objective:Given the importance of having knowledge on the hemovigilance process in nursing care,the present study was conducted to investigate the effect of the hemovigilance education on nursing students’knowledge using a conceptual *** current research was a semi-experimental ***:The samples consisted of 60 nursing students who were selected based on the inclusion criteria using the census sampling ***,these participants were randomly assigned into the two groups:experimental and control *** required data were collected before,immediately after,and 1 month after the education using the hemovigilance knowledge ***,the validity of this questionnaire was confirmed,and its reliability using the Cronbach’s alpha coefficient was reported as *** education process was conducted during a 4-week ***,the collected data were analyzed using descriptive and inferential statistics by SPSS ***:The results reveal that a significant difference existed between the knowledge scores of students in the experimental group compared with that of the control group during different times(including before,immediately after,and 1 month after the education)(P<0.0001).Of note,hemovigilance education had a significant effect on the students’knowledge(P<0.0001).Conclusions:Due to the effect of the hemovigilance education on the students’knowledge and by applying the conceptual map in the easy transfer of the educational concepts,it is recommended that the results of the present study be used to strengthen the theoretical and clinical education of nursing students.

关键词： concept map hemovigilance knowledge

Monte Carlo Simulation of a Combined-Cycle Power Plant Considering Ambient Temperature Fluctuations

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Journal of Power and Energy Engineering 2022年第5期10卷 116-131页

作者： amir hossein Jafari Yeganeh Ali Behbahaninia Parastoo Ghadamabadi Department of Energy System Engineering Faculty of Mechanical Engineering K.N. Toosi University of Technology Tehran Iran Department of Mechanical Engineering Science and Research Branch Islamic Azad University Tehran Iran

A combined-cycle power plant (CCPP) is broadly utilized in many countries to cover energy demand due to its higher efficiency than other conventional power plants. The performance of a CCPP is highly sensitive to ambient air temperature (AAT) and the generated power varies widely during the year with temperature fluctuations. To have an accurate estimation of power generation, it is necessary to develop a model to predict the average monthly power of a CCPP considering ambient temperature changes. In the present work, the Monte Carlo (MC) method was used to obtain the average generated power of a CCPP. The case study was a combined-cycle power plant in Tehran, Iran. The region’s existing meteorological data shows significant fluctuations in the annual ambient temperature, which severely impact the performance of the mentioned plant, causing a stochastic behavior of the output power. To cope with this stochastic nature, the probability distribution of monthly outdoor temperature for 2020 was determined using the maximum likelihood estimation (MLE) method to specify the range of feasible inputs. Furthermore, the plant was accurately simulated in THERMOFLEX to capture the generated power at different temperatures. The MC method was used to couple the ambient temperature fluctuations to the output power of the plant, modeled by THERMOFLEX. Finally, the mean value of net power for each month and the average output power of the system were obtained. The results indicated that each unit of the system generates 436.3 MW in full load operation. The average deviation of the modeling results from the actual data provided by the power plant was an estimated 3.02%. Thus, it can be concluded that this method helps achieve an estimation of the monthly and annual power of a combined-cycle power plant, which are effective indexes in the economic analysis of the system.

关键词： Combined-Cycle Power Plant Monte Carlo Method Ambient Air Temper-ature Maximum Likelihood Estimation Stochastic Behavior

二氧化硅包覆NiFe_2O_4担载Preyssler杂多酸用于合成双(二氢嘧啶酮)苯和3,4-二氢嘧啶-2(1H)-酮（英文）

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催化学报 2015年第3期36卷 299-307页

作者： hossein Eshghi Ali Javid amir Khojastehnezhad Farid Moeinpour Fatemeh F. Bamoharram Mehdi Bakavoli Masoud Mirzaei Department of Chemistry Faculty of Sciences Ferdowsi University of Mashhad Mashhad Iran Department of Chemistry Ahvaz Branch Islamic Azad University Ahvaz Iran Department of Chemistry Bandar Abbas Branch Islamic Azad University Bandar Abbas *** Iran Department of Chemistry College of Science Mashhad Branch Islamic Azad University Mashhad Iran

A novel magnetic acidic catalyst comprising Preyssler(H14[Na P5W30O110]) heteropoly acid support‐ed on silica coated nickel ferrite nanoparticles (Ni Fe2O4@Si O2) was *** catalyst was characterized by Fourier transform infrared,scanning electron microscopy,transmission electron microscopy,X‐ray diffraction,energy dispersive spectrum,VSM and particle size *** catalytic activity was investigated for the synthesis of bis(dihydropyrimidinone)benzene and 3,4‐dihydropyrimidin‐2(1H)‐ones derivatives by the Biginelli *** the catalyst,the reac‐tions occurred in less than 1 h with good to excellent *** importantly,the catalyst was easily separated from the reaction mixture by an external magnet and reused at least five times without degradation in the activity.

关键词：二氢嘧啶酮催化合成纳米颗粒镍铁二氧化硅扫描电子显微镜透射电子显微镜反应混合物

Low gradient ascites: A seven-year course review

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World Journal of Gastroenterology 2005年第15期11卷 2337-2339页

作者： Fariborz Mansour-Ghanaei Afshin Shafaghi amir-hossein Bagherzadeh Mohammad-Sadegh Fallah Gastrointestinal and Liver Diseases Research Center (GLDRC)

AIM: To study the patients with low gradient ascites in hospitals of Guilan Province (northern Iran).METHODS: Patients admitted in hospitals of Guilan Province with low gradient ascites from 1993 to 2000 were enrolled in the study. Serum and ascitic fluid albumin levels were determined by biochemical reactions. The serum-ascitic albumin gradient (SAAG) less than 1.1 g/dL was considered low. Statistical analysis was performed with SPSS 9.0software and P＜0.05 was considered statistically ***: Of the 148 patients enrolled in the study, 72(48.6%) were males and 76 (51.4%) were females with a mean age of 59.03±13.54 years. Tuberculous peritonitis was the most frequent cause of low gradient ascites in 68 (45.9%). Other most frequent causes were cancer in 62 (41.9%), nephrotic syndrome in 9 (6%), pancreatitis in 6 (4%). Peritoneal cancer was found in 22 (35%),ovarian and gastric cancers were found in 14 (22.5%)and 12 (19.3%), respectively. All of which were the causes of ascites. The mean SAAG was 0.68±0.19 g/dL. The mean serum and ascitic fluid albumin concentrations were higher in tuberculous patients (P＜0.006), but lactate dehydrogenase (LDH) level was higher in cancer patients (P＜0.0001). In peritoneal tuberculosis, mean ascitic glucose concentration was significantly lower than other patients (P＜0.0001).CONCLUSION: Tuberculosis should be considered in all patients with low gradient ascites especially in developing countries (like Iran), as the first cause of ascites. In the approach to patients with low gradient ascites, ascitic fluid glucose, and LDH level are useful indicators for decision making.

关键词： Ascites Tuberculosis Cancer Albumin

A new analytical solution for calculation the displacement and shear stress of fully grouted rock bolts and numerical verifications

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International Journal of Mining Science and Technology 2016年第6期26卷 1073-1079页

作者： Ghadimi Mostafa Shariar Koroush Jalalifar hossein Department of Mining Engineering Science and Research Branch Islamic Azad University Tehran *** Iran Faculty of Mining Metallurgy and Petroleum Engineering Amir Kabir University of Technology Tehran 158754413 Iran Department of Petroleum and Mining Engineering Shahid Bahonar University of Kerman Kerman *** Iran

In presence of difficult conditions in coal mining roadways, an adequate stabilization of the excavation boundary is required to ensure a safe progress of the construction. The stabilization of the roadways can be improved by fully grouted rock bolt, offering properties optimal to the purpose and versatility in use. Investigations of load transfer between the bolt and grout indicate that the bolt profile shape and spacing play an important role in improving the shear strength between the bolt and the surrounding strata. This study proposes a new analytical solution for calculation displacement and shear stress in a fully encapsulated rock bolt in jointed rocks. The main characteristics of the analytical solution consider the bolt profile and jump plane under pull test conditions. The performance of the proposed analytical solution, for three types of different bolt profile configurations, is validated by ANSYS software. The results show there is a good agreement between analytical and numerical methods. Studies indicate that the rate of displacement and shear stress from the bolt to the rock exponentially decayed. This exponential reduction in displacement and shear stress are dependent on the bolt characteristics such as: rib height, rib spacing, rib width and grout thickness, material and joint properties.

关键词： Fully grouted bolt Jointed rock Displacement Shear stress