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Some New Results about Trigonometry in Finite Fields

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Advances in Pure Mathematics 2016年第7期6卷 493-497页

作者： amiri naser Hasani Fysal Department of Mathematics Payame Noor University Tehran Iran

In this paper, we study about trigonometry in finite field, we know that , the field with p elements, where p is a prime number if and only if p = 8k + 1 or p = 8k -1. Let F and K be two fields, we say that F is an extension of K, if K⊆F or there exists a monomorphism f: K→F. Recall that , F[x] is the ring of polynomial over F. If (means that F is an extension of K), an element is algebraic over K if there exists such that f(u) = 0 (see [1]-[4]). The algebraic closure of K in F is , which is the set of all algebraic elements in F over K.

关键词： Trigonometry Finite Field Primitive Root of Unity

Fire resistance evaluation through synthetic fire tests and generative adversarial networks

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Frontiers of Structural and Civil Engineering 2024年第4期18卷 587-614页

作者： Aybike Özyüksel Çiftçioğlu M.Z.naser Department of Civil Engineering Manisa Celal Bayar University45140Türkiye School of Civil&Environmental Engineering and Earth Sciences(SCEEES) Clemson UniversityClemsonSC 29631USA Artificial Intelligence Research Institute for Science and Engineering(AIRISE) Clemson UniversityClemsonSC 29631USA

This paper introduces a machine learning approach to address the challenge of limited data resulting from costly and time-consuming fire experiments by enlarging small fire test data sets and predicting the fire resistance of reinforced concrete *** approach begins by creating deep learning models,namely generative adversarial networks and variational autoencoders,to learn the spatial distribution of real fire *** then use these models to generate synthetic tabular samples that closely resemble realistic fire resistance values for reinforced concrete *** generated data are employed to train state-of-the-art machine learning techniques,including Extreme Gradient Boost,Light Gradient Boosting Machine,Categorical Boosting Algorithm,Support Vector Regression,Random Forest,Decision Tree,Multiple Linear Regression,Polynomial Regression,Support Vector Machine,Kernel Support Vector Machine,Naive Bayes,and K-Nearest Neighbors,which can predict the fire resistance of the columns through regression and *** learning analyses achieved highly accurate predictions of fire resistance values,outperforming traditional models that relied solely on limited experimental *** study highlights the potential for using machine learning and deep learning analyses to revolutionize the field of structural engineering by improving the accuracy and efficiency of fire resistance evaluations while reducing the reliance on costly and time-consuming experiments.

关键词： deep learning fire resistance generative adversarial networks machine learning

Rice Husk at a Glance:From Agro-Industrial to Modern Applications

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Rice science 2024年第1期31卷 14-32页

作者： Masoumeh KORDI naser FARROKHI Martin I.PECH-CANUL Asadollah AHMADIKHAH Department of Cell&Molecular Biology Faculty of Life Sciences and BiotechnologyShahid Beheshti UniversityTehran ***Iran 1062 Metallurgical Industry Avenue Industrial Park Saltillo-Ramos ArizpeRamos ArizpeCoahuila 25900Mexico

Excessive waste production has led to the concept of a circular bioeconomy to deliver valuable by-products and improve environmental *** annual worldwide rice production accounts for more than 750 million tons of grain and 150 million tons of *** husk(RH)contains valuable biomaterials with extensive applications in various *** proportions of each component depend primarily on rice genotype,soil chemistry,and climatic *** and its derivatives,including ash,biochar,hydrochar,and activated carbon have been placed foreground of applications in agriculture and other *** the investigation on RH’s compositions,microstructures,and by-products has been done copiously,owing to its unique features,it is still an open-ended area with enormous scope for innovation,research,and ***,we reviewed the latest applications of RH and its derivatives,including fuel and other energy resources,construction materials,pharmacy,medicine,and nanobiotechnology to keep this versatile biomaterial in the spotlight.

关键词： circular bioeconomy rice husk activated carbon rice husk ash rice husk biochar rice husk hydrochar rice husk application

The nature and movement of thrusts in the eastern Iranian orogen:Sechengi Area on the northern border of Lut and Sistan

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Journal of Mountain Science 2024年第9期21卷 3157-3171页

作者： Shahriar KESHTGAR Mahmoud Reza HEYHAT Sasan BAGHERI Ebrahim GHOLAMI Seyed naser RAISOSSADAT Department of Geology Faculty of ScienceUniversity of BirjandBirjand ***Iran Department of Geology Faculty of ScienceUniversity of Sistan and BaluchestanZahedan 98167-45845Iran

The eastern Iranian range,known as the Sistan suture zone in the past,has recently been identified as the Sistan *** Paleogene orogeny is located between the Lut and Afghan *** structural analysis shows that most of the thrusts dip towards the NW so that the Permo-Triassic sediments and Jurassic micro-diorites of the Lut Block overthrusted over the younger *** studies show that the tectonic vergence was from the NW to the SE of the Sechengi area in the NW part of Sistan *** recognized three deformation phases in eastern *** first N-S deformation event(D1)resulted in the formation of tight E-W folds(F1)and associated cleavages(S1).The second E-W deformation event(D2),which occurred in the late Paleogene led to the bending of older structures,including the axial plane of the first-generation folds giving them a new northwest direction(F2).Additionally,the ramp of the first-phase thrusts(striking E-W)was reactivated,acquiring a new NNW orientation and exhibiting SSE tectonic *** third deformation event(D3)resulted in the formation of NNE and WNW conjugate faults in eastern *** consecutive deformation events perpendicular to each other are inconsistent with the models of simple linear orogen presented for eastern Iran(*** of eastern Iran continental crust and subsequence linear collision)and seem more consistent with the buckling orogeny(Orocline).

关键词： Thrust Tectonic vergence Orocline Buckling Sechengi Eastern Iranian ranges.

Tilt Angle Optimality Criteria for Stand Alone PV Systems

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Journal of Power and Energy Engineering 2024年第3期12卷 1-18页

作者： Mohammad Abu-naser Faculty of Engineering and Technology Philadelphia University Amman Jordan

The conventional approach to optimizing tilt angles for fixed solar panels aims to maximize energy generation over the entire year. However, in the context of a supply controlled electric grid, where solar energy availability varies, this criterion may not be optimal. This study explores two alternative optimization criteria focused on maximizing baseload supply potential and minimizing required storage capacity to address seasonality in energy generation. The optimal tilt angles determined for these criteria differed significantly from the standard approach. This research highlights additional factors crucial for designing solar power systems beyond gross energy generation, essential for the global transition towards a fully renewable energy-based electric grid in the future.

关键词： Electric Grid Fixed Solar Panels Optimal PV Tilt Angle Seasonal Solar Variability Renewable Energy Supply-Demand Balance

Influence of joint spacing and rock characteristics on the toppling stability of cut rock slope through a simplified limit equilibrium method

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Journal of Central South University 2024年第8期31卷 2694-2702页

作者： Zhang, Xue-peng Jiang, Yu-jing Du, Yan Wang, Ke-peng Cai, Yue Wang, Xing-da Su, Hang Golsanami, naser Liu, Bao-guo State Key Laboratory of Strata Intelligent Control and Green Mining Co-founded by Shandong Province and the Ministry of Science and Technology Shandong University of Science and Technology Qingdao China College of Energy and Mining Engineering Shandong University of Science and Technology Qingdao China School of Engineering Nagasaki University Nagasaki Japan Beijing Key Laboratory of Urban Underground Space Engineering University of Science and Technology Beijing Beijing China The 4th Engineering Company China Railway No.3 Engineering Group Co. Ltd. Beijing China Fukumichi Limited Liability Company Fukuoka Japan College of Electrical Engineering and Automation Shandong University of Science and Technology Qingdao China School of Civil Engineering Beijing Jiaotong University Beijing China

Toppling failure of rock mass/soil slope is an important geological and environmental problem. Clarifying its failure mechanism under different conditions has great significance in engineering. The toppling failure of a cutting slope occurred in a hydropower station in Kyushu, Japan illustrates that the joint characteristic played a significant role in the occurrence of rock slope tipping failure. Thus, in order to consider the mechanical properties of jointed rock mass and the influence of geometric conditions, a simplified analytical approach based on the limit equilibrium method for modeling the flexural toppling of cut rock slopes is proposed to consider the influence of the mechanical properties and geometry condition of jointed rock mass. The theoretical solution is compared with the numerical solution taking Kyushu Hydropower Station in Japan as one case, and it is found that the theoretical solution obtained by the simplified analysis method is consistent with the numerical analytical solution, thus verifying the accuracy of the simplified method. Meanwhile, the Goodman-Bray approach conventionally used in engineering practice is improved according to the analytical results. The results show that the allowable slope angle may be obtained by the improved Goodman-Bray approach considering the joint spacing, the joint frictional angle and the tensile strength of rock mass together.

关键词： flexural toppling rock slope simplified limit equilibrium method slope stability

The nature and movement of thrusts in the eastern Iranian orogen: Sechengi Area on the northern border of Lut and Sistan

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Journal of Mountain Science 2024年第09期 3157-3171页

作者： Shahriar KESHTGAR Mahmoud Reza HEYHAT Sasan BAGHERI Ebrahim GHOLAMI Seyed naser RAISOSSADAT Department of Geology Faculty of Science University of Birjand Department of Geology Faculty of Science University of Sistan and Baluchestan

The eastern Iranian range,known as the Sistan suture zone in the past,has recently been identified as the Sistan *** Paleogene orogeny is located between the Lut and Afghan *** structural analysis shows that most of the thrusts dip towards the NW so that the Permo-Triassic sediments and Jurassic micro-diorites of the Lut Block overthrusted over the younger *** studies show that the tectonic vergence was from the NW to the SE of the Sechengi area in the NW part of Sistan *** recognized three deformation phases in eastern *** first N-S deformation event（D1）resulted in the formation of tight E-W folds（F1） and associated cleavages（S1）.The second E-W deformation event（D2）,which occurred in the late Paleogene led to the bending of older structures,including the axial plane of the first-generation folds giving them a new northwest direction（F2）.Additionally,the ramp of the first-phase thrusts（striking E-W） was reactivated,acquiring a new NNW orientation and exhibiting SSE tectonic *** third deformation event（D3） resulted in the formation of NNE and WNW conjugate faults in eastern *** consecutive deformation events perpendicular to each other are inconsistent with the models of simple linear orogen presented for eastern Iran（*** of eastern Iran continental crust and subsequence linear collision） and seem more consistent with the buckling orogeny（Orocline）.

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Cardiovascular risk factors affecting COVID-19 outcomes at a tertiary referral hospital in northwest Iran: A prospective cohort study

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Journal of Acute Disease 2024年第1期13卷 8-13页

作者： Mahsa Behnemoon Mojdeh Mehrno naser Gharebaghi Milad Hamdi Department of Cardiology School of MedicineUrmia University of Medical ScienceUrmiaIran Medical Center Urmia University of Medical ScienceUrmiaIran Department of Dermatology and Infectious Disease School of MedicineUrmia University of Medical ScienceUrmiaIran

Objective:To investigate cardiovascular risk factors affecting COVID-19 outcomes in a tertiary referral ***:This prospective cohort study analyzed 269 participants with *** primary outcomes were ICU admission,prolonged hospital stay duration,and in-hospital *** secondary outcomes included death,chronic symptoms,and NYHA functional class during follow-up ***:A total of 412 patients with COVID-19 symptoms were enrolled in the study,and out of which 269 patients had complete medical records and positive SARS-CoV-2 PCR test results,fulfilling the study criteria were *** patients were divided into two groups,with cardiovascular comorbidities(group A,n=122),such as established cardiovascular disease,diabetes mellitus,and hypertension,and without cardiovascular comorbidities(group B,n=147).Binary logistic regression analysis showed that patients with underlying hypertension,diabetes,and established cardiovascular disease had a 1.55(95%CI:1.28-2.26),1.62(95%CI:1.34-2.13),and 1.63(95%CI:1.07-5.34)-fold risk of mortality,respectively in the adjusted ***:Hospitalized COVID-19 patients with predisposing cardiovascular risk factors are more susceptible to develop worse *** attention should be paid to the management and follow-up of these patients.

关键词： COVID-19 Outcome Cardiovascular Chronic symptoms Diabetes mellitus Hypertension

Pediatric and adult liver transplantation in Bahrain: The experiences in a country with no available liver transplant facilities

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World Journal of Transplantation 2024年第1期14卷 96-111页

作者： Hasan M Isa Fatema A Alkharsi Jawad K Khamis Sawsan A Hasan Zainab A naser Zainab N Mohamed Afaf M Mohamed Shaikha A Altamimi Department of Pediatrics Salmaniya Medical ComplexManama 26671Bahrain Department of Pediatrics Arabian Gulf UniversityManama 26671Bahrain Department of Medicine Salmaniya Medical ComplexManama 26671Bahrain Public Health Directorate Ministry of HealthManama 26671Bahrain The Overseas Office Supreme Committee for Treatment AbroadMinistry of HealthManama 26671Bahrain

BACKGROUND Liver transplantation(LT)is a life-saving procedure for patients with end-stage liver disease and has become the standard and most effective treatment method for these *** are many indications for LT that vary between countries and *** outcome of LT depends on the available facilities and surgical expertise,as well as the types of liver graft donors *** To assess the clinical characteristics of patients from Bahrain who underwent LT overseas,and analyze factors affecting their *** In this retrospective cohort study,we reviewed the medical records and overseas committee registry information of all pediatric and adult patients who were sent overseas to undergo LT by the Pediatric and Medical Departments of Salmaniya Medical Complex and Bahrain Defence Force Hospital via the Overseas Treatment Office,Ministry of Health,Kingdom of Bahrain,between 1997 and *** data,LT indication,donor-recipient relationship,overseas LT center,graft type,post-LT medications,and LT complications,were *** measured included the overall and 5-year LT survival ***’s exact,Pearsonχ2,and Mann-Whitney U tests were used to compare the pediatric and the adults’group in terms of clinical characteristics,donor-recipient relationship,medication,complications,and *** analysis was estimated via the Kaplan-Meier’s *** and multivariate analyses were used to detect predictors of *** Of the 208 eligible patients,170(81.7%)were sent overseas to undergo LT while 38(18.3%)remained on the waiting *** the 170 patients,167(80.3%)underwent LT and were included in the *** majority of the patients were Bahraini(91.0%),and most were males(57.5%).One-hundred-and-twenty(71.8%)were adults and 47(28.3%)were *** median age at transplant was 50.0[interquartile range(IQR):14.9–58.4]*** main indication for pediatric LT was biliary atresia(31.9%),while that of adult LT was

关键词： Overseas liver transplantation End-stage liver disease Liver transplant facilities Liver donor Biliary atresia Hepatitis C