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Folded Radiolarite Unit as a Kinematic Indicator of the Zagros Collision Processes, Southwestern Iran

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Journal of Earth Science 2018年第1期29卷 210-222页

作者： Abdolreza Partabian Ahmad Nourbakhsh khalil Sarkarinejad Department of Geology College of Science University of Sistan and Baluchestan Department of Earth Sciences College of Sciences Shiraz University

Radiolarites have an important role in the reconstruction of the paleogeography, bathymetry and their coexistence with ophiolites gives an opportunity to determine the tectonic his- tory of collisional zones. The radiolarite units of the southwestern Neyriz are part of the Zagros ac- cretionary prism and positioned beneath the thick bedded carbonate sediments of Tarbur Forma- tion. The existing various structural elements within this unit give a unique fortunate for investiga- tion on the deformation history and studying of the kinematics of the Zagros collision zone. The nu- merous evidence show that this unit has experienced different deformation conditions during ongo- ing evolution, including ductile, brittle-ductile and brittle deformation conditions. The main strike of E-W for axial planes of folds, eastward trend and plunge of fold axes, boudins＇ neck axes and Type III of the fold interference patterns are indicators of formation and evolution of folds during tran- spressional deformation. Structural evolution of the study area has been affected by an NE-dipping subduction zone of Neo-Tethyan oceanic lithosphere below the Iranian microcontinents. These structural elements suggest that high mechanical anisotropy and two successive generations of fold- ing simultaneously with thrusting and extrusion of this unit had led to formation and evolution of this highly asymmetrical folded unit on top of the subducted oceanic crust.

关键词： Iran Zagros suture zone kinematic indicator transpression deformation conditions.

First Record of Sexual Dimorphism in Toxasterid Echinoid Heteraster from the Early Cretaceous Deposits of the Kopet-Dagh Basin,NE Iran

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Acta Geologica Sinica(English Edition) 2023年第5期97卷 1318-1334页

作者： Hossein KAmYABI SHADAN morteza TAHERPOUR khalil-ABAD Exploration Directorate of the National Iranian Oil Company TehranIran Young Researchers and Elite Club Mashhad BranchIslamic Azad UniversityMashhadIran

Spatangoid echinoids belonging to Heteraster found in the Lower Cretaceous limestones and calcareous deposits of the Tirgan and Sarcheshmeh formations(Barremian-Aptian)in the Bahman jan-Bala stratigraphic section on the northern flank of the Borouj syncline,situated in the eastern Kopet-Dagh Basin,northeastern Iran are assessed as a sexually dimorphic *** dimorphism is a common feature in echinoids and,in this study of Heteraster renngarteni Poretzkaja,1961,sexual dimorphism has been detected for the first time in the family Toxasteridae.

关键词： invertebrate paleontology echinodermata Heteraster sexual dimorphism Barremian–Aptian Kopet-Dagh Iran

magnetic and Heat Resistant Poly(imide-ether) Nanocomposites Derived from methyl Rich 9H-xanthene: Synthesis and Characterization

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Chinese Journal of Polymer Science 2018年第7期36卷 822-834页

作者： khalil Faghihi Hassan moghanian Fatemeh mozafari meisam Shabanian Organic Polymer Chemistry Research Laboratory Department of Chemistry Faculty of Science Arak University Department of Chemistry Dezful Branch Islamic Azad University Faculty of Chemistry and Petrochemical Engineering Standard Research Institute (SRI)

In this study a new series of magnetic and heat resistant nanocomposites were prepared based on a highly soluble poly（imideether）（PIE） reinforced with two different types of magnetic nanoparticles via a solution intercalation technique. New PIE with good solubility and desired molar mass containing bulky xanthene rings and amide groups in the side chains was synthesized via thermal cyclization of the poly（amic acid） precursor, obtained from the reaction of a new diamine derived from 9H-xanthene and 4,4＇- oxydiphthalic dianhydride （ODPA）. Improved solubility was attributed to the presence of xanthene group and flexible ether linkage in the polyimide backbones that reduce the chain-chain interaction and enhance solubility by penetrating solvent molecules into the polyimide chains. Fe3O4 nanoparticles （mNPs） which synthesized from chemical co-precipitation route were coated with silica （SiO2）, sequentially with （3-aminopropyl）triethoxysilane and poly-melamine-terephthaldehyde （mNPs-PmT）, and then separately dispersed in the poly（amic acid） solutions and thermally imidized to form PIE/Fe3O4 and PIE/mNPs-PmT nanocomposites. The nanostructures and properties of the resultant materials were investigated using FTIR spectroscopy, X-ray diffraction （XRD）, field emission scanning electron microscopy （FE-SEm）, transmission electron microscopy （TEm）, vibrating sample magnetometer （VSm）, thermal gravimetric analysis （TGA） and differential scanning calorimetry （DSC）. The properties of the nanocomposites were strongly related to the dispersion and interaction between the nanoparticles and PIE matrix. The thermogravimetric analysis （TGA） results showed that the addition of mNPs-PmT nanoparticles resulted in a substantial increase in the thermal stability of the corresponding PIEN. The temperature at 10% weight loss （T10） was increased from 416℃to 428℃ for PIEN containing 3 wt% mNPs-PmT as compared to neat PIE, as well the char yield enhanced. Furthermore, the mNPs-PmT nanoparticles

关键词： Poly(imide-ether) Nanocomposite 9H-xanthene magnetic nanoparticles

Polyimide-silver nanocomposite containing phosphine oxide moieties in the main chain:Synthesis and properties

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Chinese Chemical Letters 2010年第11期21卷 1387-1390页

作者： khalil Faghihi mohsen Hajibeygi meisam Shabanian Organic Polymer Research Laboratory Department of ChemistryFaculty of ScienceArak University

New flame-retardant polyimide-silver nanocomposite containing phosphine oxide moiety in the main chain was synthesized by a convenient ultraviolet irradiation technique.A precursor such as AgNO_3 was used as the source of the silver *** 6 as a source of polymer was synthesized by polycondensation reaction of bis（3-aminophenyl） phenyl phosphine oxide 4 with pyromellitic anhydride 5 in the presence of iso-quinoline as base and in m-cresol *** resulting composite film was characterized by FTIR spectroscopy,X-ray diffraction（XRD）,transmission electron microscopy（TEm）,thermogravimetry（TGA） and differential scanning calorimetry（DSC）.The average size of the nanometer Ag particles is about 10 *** temperature of 5 and 10%weight loss and also the char yield at 600℃of polyimide-silver nanocomposite 6a were higher than the pure PI 6.

关键词： Flame-retardant Polyimide-silver nanocomposite Phosphine oxide moiety

Robust Stabilization of Load Frequency Control System Under Networked Environment

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International Journal of Automation and computing 2017年第1期14卷 93-105页

作者： Ashraf khalil Ji-Hong Wang Omar mohamed Electrical and Electronics Engineering Department University of Benghazi Benghazi Libya School of Engineering University of Warwick Coventry UK King Abdullah Ⅱ Faculty of Engineering Princess Sumaya University of Technology Amman Jordan

The deregulation of the electricity market made the open communication infrastructure an exigent need for future power system. In this scenario dedicated communication links are replaced by shared networks. These shared networks are characterized by random time delay and data loss. The random time delay and data loss may lead to system instability if they are not considered during the controller design stage. Load frequency control systems used to rely on dedicated communication links. To meet future power system challenges these dedicated networks are replaced by open communication links which makes the system stochastic. In this paper, the stochastic stabilization of load frequency control system under networked environment is investigated. The shared network is represented by three states which are governed by markov chains. A controller synthesis method based on the stochastic stability criteria is presented in the paper. A one-area load frequency control system is chosen as case study. The effectiveness of the proposed method for the controller synthesis is tested through simulation. The derived proportion integration （PI） controller proves to be optimum where it is a compromise between compensating the random time delay effects and degrading the system dynamic performance. The range of the PI controller gains that guarantee the stochastic stability is determined. also the range of the PI controller gains that achieve the robust stochastic stability is determined where the decay rate is used to measure the robustness of the system.

关键词： Load frequency control load frequency control (LFC) markov chains networked control system robust stabilization.

Bidirectional Recurrent Nets for ECG Signal Compression

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Journal of Computer Science Research 2022年第4期4卷 15-25页

作者： Eman al-Saidi khalil El Hindi Computer Science Department King Saud UniversityRiyadhSaudi Arabia

Electrocardiogram(ECG)is a commonly used tool in biological diagnosis of heart *** allows the representation of electrical signals which cause heart muscles to contract and ***,accurate deep learning methods have been developed to overcome manual diagnosis in terms of time and ***,most of current automatic medical diagnosis use long electrocardiogram(ECG)signals to inspect different types of heart ***,ECG signal files tend to require large storage to store and may cause significant overhead when exchanged over a computer *** raises the need to come up with effective compression methods for ECG *** this work,the authors investigate using BERT(Bidirectional Encoder Representations from Transformers)model,which is a bidirectional neural network that was originally designed for natural *** authors evaluate the model with respect to its compression ratio and information preservation,and measure information preservation in terms of the of the accuracy of a convolutional neural network in classifying the decompressed *** results show that the method can achieve up to 83%saving in ***,the classification accuracy of the decompressed signals is around 92.41%.Furthermore,the method enables the user to balance the compression ratio and the required accuracy of the CNN classifiers.

关键词： BERT model Convolutional neural networks(CNN) Data compression Deep learning ECG diagnosis

A selective, sensitive and label-free visual assay of fructose using anti-aggregation of gold nanoparticles as a colorimetric probe

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Chinese Chemical Letters 2016年第6期27卷 847-851页

作者： Foroogh Keshvari morteza Bahram khalil Farhadi Department of analytical Chemistry Faculty of chemistry Urmia University

A new convenient colorimetric sensor for fructose based on anti-aggregation of citrate-capped gold nanoparticles（Au NPs） is presented. 4-mercaptophenylboronic acid（mPBA） induces the aggregation of Au NPs, leading to a color change from red to blue. Fructose as a potent competitor has strong affinity for mPBA and a borate ester is formed between mPBA and fructose. There is an obvious color change from blue to red with increasing the concentration of fructose. The anti-aggregation effect of fructose on Au NPs was seen by the naked eye and monitored by UV–vis spectra. Our results showed that the absorbance ratio（A（519）/A（640）） was linear with fructose concentration in the range of 0.032–0.96 μmol/L（R^2= 0.996）, with a low detection limit of 0.01 μmol/L（S/N = 3）. Notably, a highly selective recognition of fructose was shown against other monosaccharide and disaccharide（glucose, mannose, galactose,lactose and saccharose）. With anti-aggregation assays higher selectivity is achievable. The results of this work provide a rapid method for evaluating the quantitative analysis of fructose in human plasma at physiologically meaningful concentrations and at neutral pH. The proposed procedure can be used as an efficient method for the precise and accurate determination of fructose.

关键词： Colorimetric sensor Gold nanoparticles Anti-aggregation Fructose

Shape retention of injection molded stainless steel compacts

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Journal of Central South University of Technology 2005年第2期12卷 107-112页

作者：李益民 K.A.khalil 黄伯云 State Key Laboratory of Powder metallurgy Central South UniversityChangsha 410083 China

The effects of the binder composition, the powder loading, the thermal properties of feedstocks, and the injection molding parameters on the compact shape retention for metal injection molding 17-4PH stainless steel were investigated. The high-density polyethylene is more effective than ethylene vinyl acetate as a second component of the wax-based binder to retain compact shape due to its higher pyrolytic temperature and less heat of fusion. The compact distortion decreases with increasing the powder loading, molding pressure and molding temperature. There exists an optimal process combination including the powder loading of 68%, molding pressure of 120mPa and molding temperature of 150℃. Under this process condition, the percentage of distorted compacts is the lowest.

关键词： injection molding shape retention stainless steel

Linear and Nonlinear Electron Beam Heating of magnetized, motional, and Dusty Plasma

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Journal of modern Physics 2016年第14期7卷 1889-1900页

作者： Sherif mohamed khalil Badriah mesfer al alotaibi Physics Department Faculty of Science Princess Nora Bint Abdurrahman University Riyadh KSA Plasma Physics & Nuclear Fusion Department N.R.C. Atomic Energy Authority Cairo Egypt

Recent theoretical work on electron beam heating of magneto-active motional Plasma is presented. Power transfer from beam (plasma heating) and generated electric fields for different physical situations of linear and nonlinear beam-plasma interaction, are studied. Based on previous works [1] [2], we shall study the effects of dusts and plasma motion () on plasma heating. Besides, the case of an inhomogeneity of beam velocity () is also considered. Taking into consideration nonlinear process, dust, plasma motion, and beam velocity inhomogeneity, are found to play a crucial role via power absorbed by the beam and the generated electric field in the system.

关键词： Beam-Plasma Interaction motional Plasma Dusty Plasmas Plasma Heating Electric Field Generation