Dynamic Type-2 Fuzzy Time Warping (DT2FTW): A Hybrid Model for Uncertain Time-Series Prediction

Aref Safari,Rahil Hosseini,Mahdi Mazinani 한국지능시스템학회 2021 INTERNATIONAL JOURNAL of FUZZY LOGIC and INTELLIGE Vol.21 No.4

Prediction of time series is associated with nondeterministic pattern analysis for uncertain conditions. Therefore, it is necessary to develop high-quality prediction methods for real-world applications. Type-2 fuzzy systems can handle high-order uncertainties, such as sequential dependencies associated with time series. Precise and reliable prediction can help to develop reasonable strategies and assist specialists in planning the best policies for modeling events in uncertain time series. In this study, a hybrid model (dynamic type-2 fuzzy time warping [DT2FTW]) was proposed for handling high-order uncertainties in time-series prediction. A type-2 fuzzy intelligent system was developed alongside a dynamic time warping algorithm for predicting the patterns’ similarity in long-time series for time-series prediction. The results demonstrate that the proposed DT2FTW model yields more reliable predictions on global standard benchmarks such as the Mackey-Glass, Dow Jones, and NASDAQ time-series. The results also confirm that the proposed DT2FTW model has lower error rates than its counterpart algorithms in terms of the root mean square error (RMSE), mean absolute error (MAE), and mean percentage error (MPE). In addition, the results confirm the superiority of the proposed model with an average area under the ROC curve (AUC) of 94%, with the 95% confidence interval (92%-95%).

Lack of Influence of the SMAD7 Gene rs2337107 Polymorphism on Risk of Colorectal Cancer in an Iranian Population

Akbari, Zahra,Safari-Alighiarloo, Nahid,Haghighi, Mahdi Montazer,Vahedi, Mohsen,Mirtalebi, Hanieh,Azimzadeh, Pedram,Milanizadeh, Saman,Shemirani, Atena Irani,Nazemalhosseini-Mojarad, Ehsan,Aghdaei, Ha Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.11

SMAD7 has been identified as a functional candidate gene for colorectal cancer (CRC). SMAD7 protein is a known antagonist of the transforming growth factor beta ($TGF-{\beta}$) signaling pathway which is involved in tumorigenesis. Polymorphisms in SMAD7 may thus alter cancer risk. The aim of this study was to investigate the influence of a SMAD7 gene polymorphism (rs2337107) on risk of CRC and clinicopathological features in an Iranian population. In total, 210 subjects including 105 patients with colorectal cancer and 105 healthy controls were recruited in our study. All samples were genotyped by TaqMan assay via an ABI 7500 Real Time PCR System (Applied Biosystems) with DNA from peripheral blood. The polymorphism was statistically analyzed to investigate the relationship with the risk of colorectal cancer and clinicopathological properties. Logistic regression analysis revealed that there was no significant association between rs2337107and the risk of colorectal cancer. In addition, no significant association between genotypes and clinicopathological features was observed (p value>0.05). Although there was not any association between genotypes and disorder, CT was the most common genotype in this population. This genotype prevalence was also higher in the patients with well grade (54.9%) and colon (72.0%) tumors. Our results provide the first evidence that this polymorphism is not a potential contributor to the risk of colorectal cancer and clinicopathological features in an Iranian population, and suggests the need of a large-scale case-control study to validate our results.

A computational intelligence scheme for prediction of interfacial tension between pure hydrocarbons and water

Kalantari Meybodi, Mahdi,Shokrollahi, Amin,Safari, Hossein,Lee, Moonyong,Bahadori, Alireza Elsevier 2015 Chemical engineering research & design Vol.95 No.-

<P><B>Abstract</B></P> <P>Interfacial tension plays a major role in many disciplines of science and engineering. Complex nature of this property has restricted most of the previous theoretical studies on thermophysical properties to bulk properties measured far from the interface. Considering the drawbacks and deficiencies of preexisting models, there is yet a huge interest in accurate determination of this property using a rather simple and more comprehensive modeling approach. In recent years, inductive machine learning algorithms have widely been applied in solving a variety of engineering problems. This study introduces least-square support vector machines (LS-SVM) approach as a viable and powerful tool for predicting the interfacial tension between pure hydrocarbon and water. Comparing the model to experimental data, an excellent agreement was observed yielding the overall squared correlation coefficient (<I>R</I> <SUP>2</SUP>) of 0.993. Proposed model was also found to outperform when compared to some previously presented multiple regression models. An outlier detection method was also introduced to determine the model applicability domain and diagnose the outliers in the gathered dataset. Results of this study indicate that the model can be applied in systems over temperature ranges of 454.40–890°R and pressure ranges of 0.1–300MPa.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Least square support vector machine (LS-SVM) algorithm is used to estimate Interfacial tension (IFT). </LI> <LI> The model has been developed and tested using several hundreds series of the data. </LI> <LI> Validity of the presented models has been evaluated by utilizing several statistical parameters. </LI> <LI> The predictions of the developed models results are in excellent agreement with data. </LI> </UL> </P>

Spinal Surgery and Subsequent ESR and WBC Changes Pattern: A Single Center Prospective Study

Akram Zare,Mohammadmahdi Sabahi,Hosein Safari,Arash Kiani,Meic H. Schmidt,Mahdi Arjipour 대한신경손상학회 2021 Korean Journal of Neurotrauma Vol.17 No.2

Objective: Postoperative inflammation and infections are common complications of spinal surgery and have similar symptoms. However, postoperative infection may lead to a poor outcome and must be differentiated from postoperative inflammation. The objective of this study is determine the changing pattern of postoperative ESR and WBC counts, and investigate the effects of different variables. Methods: A total of 61 patients who underwent spinal surgery were enrolled in this prospective study. The erythrocyte sedimentation rate (ESR) and white blood cell (WBC) counts were measured the day before surgery and on 1st, 3rd, 5th, 7th, and 14th postoperative days. Results: WBC counts increased on the 1st postoperative day in comparison with the preoperative day (p<0.001), and they gradually decreased until the preoperative value was reached on the 14th postoperative day (p=0.14). The ESR also increased postoperatively, reaching a peak on the 5th postoperative day in comparison with the preoperative day (p<0.001) and gradually decreased thereafter. However, on the 14th postoperative day, the ESR was significantly greater than the preoperative value (p<0.001). In addition, a significant positive correlation was observed between ESR and age, duration of surgery, intraoperative blood loss, and duration of anesthesia. Conclusion: WBC count continued to rise and was the highest on the 1st postoperative day, after which it gradually decreased and attained normal values on the 14th postoperative day, while the ESR increased on the 1st postoperative day, reached the highest level in patients with and without simultaneous instrumentation on 7th and 5th postoperative days, respectively, and gradually decreased.

Microstructure Analysis of the Pack Cementation Aluminide Coatings Modified by CeO2 Addition

Hamid Zahedi,Farhad Shahriari Nogorani,Mahdi Safari 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.5

Minor additions of reactive elements (Y, Ce, Hf, etc.) can improve the oxidation behavior of high temperature alloys andcoatings such as aluminide coatings. In the current investigation cerium-modified aluminide coatings were developed viaadditions of CeO2to the powder mixture of high activity pack cementation aluminizing. Nickel-based substrates were aluminizedat 750 °C and then diffusion annealed at 1080 °C. Microstructure of the coatings was studied using scanning electronmicroscopy, energy dispersive spectroscopy and X-ray diffraction. The results were compared with the characterization resultsof specimens achieved by aluminizing an electrodeposited Ni–CeO2 interlayer at 1030 °C. The coatings modified by CeO2addition to the pack showed a dense Al-rich NiAl surface layer with cerium distributed in the coating, however, the coatingsmodified by Ni–CeO2 interlayer revealed a porous Ni-rich aluminide layer containing CeO2particles. Increasing the CeO2content of the pack decreased the thickness of the final coating, but the presence of CeO2particles in the interlayer increasedthe thickness of the final aluminide coating. The observed microstructural features were explained using thermodynamicanalysis of equilibrium concentration of the involved gaseous species.

Sonocatalytic and photocatalytic efficiency of transition metal-doped ZnO nanoparticles in the removal of organic dyes from aquatic environments

Khosro Hossienzadeh,Afshin Maleki,Hiua Daraei,Mahdi Safari,Radheshyam Pawar,이승목 한국화학공학회 2019 Korean Journal of Chemical Engineering Vol.36 No.8

The present study investigated the efficiency of transition metal-doped ZnO nanoparticles (NPs) in the removal of Direct Blue 71 from aqueous solutions through photocatalytic (UV and visible light) and sonocatalytic processes. The ZnO particles were synthesized and analyzed by the SEM, XRD, FTIR, AFM, DLS, and zeta potential. The reaction conditions were optimized by concerned catalyst (i.e., dopant percentage and catalyst amount), solution pH, catalyst dose and initial dye concentration. The results demonstrated that the Ag-doped ZnO NPs could provide the highest UV light-based photocatalytic efficiency, while the Cu-doped NPs present the greatest sonocatalytic and visible light-based photocatalytic efficiencies. In all processes, the dye removal efficiency was better in acidic pH. Based on the insignificant difference of efficiency over the acidic range of pH, the natural pH of the dye, i.e., 5.6, was considered as the optimal pH value. Also, the increase of dopant percentage enhanced the decolorization efficiency of the catalysts. However, 2.5% dopant amount was selected as the optimal dopant content due to the negligible difference in the decolorization percentages observed using the 2.5 and 5% dopant percentages. Furthermore, the increase of catalyst dose and contact time increased the removal efficiency, while the increase of initial dye concentration resulted in a lower extent of dye decolorization.

The effect of bee prepolis on primary dysmenorrhea: a randomized clinical trial

Ensiyeh Jenabi,Bita Fereidooni,Manoochehr Karami,Seyedeh Zahra Masoumi,Mahdi Safari,Salman Khazaei 대한산부인과학회 2019 Obstetrics & Gynecology Science Vol.62 No.5

ObjectivePrimary dysmenorrhea typically occurs with no associated pelvic pathology and is common in adolescents and youngwomen. This study evaluated the effect of bee propolis on relief of primary dysmenorrhea. MethodsThe study was performed in 2018 in Hamadan, in western Iran, among female students with primary dysmenorrhea. Participants were randomly divided into two groups, using balanced block randomization, and were administereda placebo or bee propolis capsules for 5 days during two menstruation cycles. The number of participants requiredwas estimated to be 86 in total, with 43 students in each group according to the inclusion criteria. We used the visualanalog scale to assess pain severity. The independent t-test was conducted for comparing between two groups, usingSPSS 16.0. ResultsA significant change was found in the mean pain scores during the first (P<0.001) and second (P<0.001) months afterusing bee propolis in comparison with placebo. The means of the pain scores in the bee propolis group were 5.32±2.28and 4.74±2.40 in first and second months after the intervention, respectively, whereas the means of the pain scores inthe placebo group were 7.40±1.21 and 7.17±1.24 in first and second months after the intervention, respectively. ConclusionOur study showed that the use of bee propolis for two months compared with placebo reduced primary dysmenorrheaduring the first and second months after use, with no adverse effects. Therefore, it could be used as an alternative tononsteroidal anti-inflammatory drugs for relief of primary dysmenorrhea.

Photocatalytic degradation of organic dyes using WO3-doped ZnO nanoparticles fixed on a glass surface in aqueous solution

Roya Ebrahimi,Afshin Maleki,Yahya Zandsalimi,Reza Ghanbari,Behzad Shahmoradi,Reza Rezaee,Mahdi Safari,주상우,Hiua Daraei,Shivaraju Harikaranahalli Puttaiah,Omid Giahi 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.73 No.-

The present study aimed at evaluating the application of tungsten oxide-doped zinc oxide nanoparticlesfor the photocatalytic degradation of Direct Blue 15 dye in a sequencing batch reactor. ZnO nanoparticleswere doped with WO3 through hydrothermal synthesis method. To characterize the synthesizednanoparticles scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy,atomic force microscopy, zeta potential analysis, and ultraviolet–visible spectroscopy were used. Theradiation source in this study wasfive 6 W UV lamps. Operational parameters affecting the process,namely pH, light intensity, dopant percentage, dye concentration, and contact time, were evaluated. Theresults of the present study revealed that the efficiency of the photocatalytic process for the degradationof organic dyes was higher at acidic pH values than neutral or basic values. In addition, upon increasingthe light intensity from 172 to 505 W/m2, the efficacy of dye degradation was enhanced from 27.8 to73.5%. Increasing the concentration of the dopant percentage from 1 to 5% w/v increased the degradationefficacy from 30.69 to 73.1%. Increasing the initial dye concentration from 20 to 100 mg/L decreased thedegradation efficacy from 86.9 to 37.5%. Photocatalytic process using WO3-doped ZnO nanoparticlesfixedon a glass surface thus was proven to show a good efficiency for the degradation of organic dye in aquaticsolutions.