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Effect of axial length and anterior chamber depth on the peripheral refraction profile

International Journal of Ophthalmology(English edition) 2021年第2期14卷 292-298页

作者： Masoud Khorrami-Nejad Raha Moradi Alireza Akbarzadeh Baghban bahram khosravi Translational Ophthalmology Research Center Farabi Eye HospitalTehran University of Medical SciencesTehran ***Iran School of Rehabilitation Shahid Beheshti University of Medical SciencesTehran ***Iran Proteomics Research Center Department of BiostatisticsSchool of Allied Medical SciencesShahid Beheshti University of Medical Sciences

AIM:To evaluate the effect of axial length(AL)and anterior chamber depth(ACD)on peripheral refractive profile in myopic patients compared to emmetropic ***:This cross-sectional study was conducted in right eyes of 58 participants of whom 38 were emmetropic and 20 were *** and peripheral refraction were measured at 10°,20°,and 30°eccentricities in nasal and temporal fields using an open-field *** Lenstar LS900 was used to measure ACD and *** participants were divided into three groups of short(24.5 mm)according to AL and three groups of low ACD(3.60 mm)according to ***:The mean age of the participants was 22.26±3.09 y(range 18-30 y).The peripheral mean spherical refractive error showed a hypermetropic shift in myopic and emmetropic groups although this shift was more pronounced in the myopic *** results showed significant changes in the spherical equivalent,J0,and J45 astigmatism in all gazes with an increase in eccentricity(P<0.001).The pattern of refractive error changes was more noticeable in long and short eyes versus normal AL ***,the pattern of peripheral refractive changes was much more prominent in the high ACD group versus the normal ACD group and in the normal ACD group versus the low ACD ***:Peripheral refraction changes are greater in participants with AL values outside the normal range and deeper ACD values compared to participants with normal AL and ACD.

关键词： anterior chamber depth axial length peripheral refraction

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Higher order aberration comparison between two aspherical intraocular lenses: MC6125AS and Akreos advanced optics

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International Journal of Ophthalmology(English edition) 2015年第3期8卷 565-568页

作者： Mohammad Taher Rajabi Sara Korouji Mahgol Farjadnia Mohammad Naderan Mohammad Bagher Rajabi bahram khosravi Seyed Mehdi Tabatabaie Eye Research Center Farabi Eye Hospital Qazvin SquareTehran University of Medical Sciences

AIM: To compare higher order aberrations in two aspherical intraocular lenses(IOLs): Akreos advanced optics(AO) and Dr. Schmidt Microcrystalline 6125 aspheric anterior surface(MC6125AS) with each other. METHODS: Forty eyes of 39 patients underwent phacoemulsification and Akreos AO and MC6125 AS were implanted in their eyes in a random manner. Three months post-operatively, higher order aberrations including spherical aberration, coma aberration, and total aberrations were measured and ***: The total aberration was 0.24±0.17 in eyes with Dr. Schmidt and 0.20 ±0.01 in eyes with Akreos AO(P =0.361). The mean of coma aberration was 0.17 ±0.21 and 0.09 ±0.86 in Dr. Schmidt and Akreos lenses,respectively(P =0.825). Total spherical aberration was almost the same in both groups(mean: 0.05, P =0.933).Best corrected visual acuity in Akreos AO(0.10±0.68) and Dr. Schmidt(0.09±0.67) did not differ significantly(P =0.700). CONCLUSION: There is no statistically significant difference in the higher order aberrations between these two aspherical lenses.

关键词： aspherical lenses higher order aberrations cataract intraocular lens

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Shear stress distribution prediction in symmetric compound channels using data mining and machine learning models

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Frontiers of Structural and Civil Engineering 2020年第5期14卷 1097-1109页

作者： Zohreh SHEIKH KHOZANI Khabat khosravi Mohammadamin TORABI Amir MOSAVI bahram REZAEI Timon RABCZUK Institute of Structural Mechanics Bauhaus Universität-WeimarWeimar D-99423Germany Department of Watershed Management Engineering Faculty of Natural ResourcesSari Agricultural Science and Natural Resources UniversitySari 48181Iran Department of Civil and Environmental Engineering Idaho State UniversityPocatelloID 83209USA School of the Built Environment Oxford Brookes UniversityOxford OX30BPUK Kando Kalman Faculty of Electrical Engineering Obuda UniversityBudapest 1034Hungary Department of Civil Engineering Bu-Ali Sina UniversityHamedan 65178Iran

Shear stress distribution prediction in open channels is of utmost importance in hydraulic structural engineering as it directly affects the design of stable *** this study,at first,a series of experimental tests were conducted to assess the shear stress distribution in prismatic compound *** shear stress values around the whole wetted perimeter were measured in the compound channel with different floodplain widths also in different flow depths in subcritical and supercritical conditions.A set of,data mining and machine learning algorithms including Random Forest(RF),M5P,Random Committee,KStar and Additive Regression implemented on attained data to predict the shear stress distribution in the compound *** indicated among these five models;RF method indicated the most precise results with the highest R2 value of ***,the most powerful data mining method which studied in this research compared with two well-known analytical models of Shiono and Knight method(SKM)and Shannon method to acquire the proposed model functioning in predicting the shear stress *** results showed that the RF model has the best prediction performance compared to SKM and Shannon models.

关键词： compound channel machine learning SKM model shear stress distribution data mining models

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Preparation of CO2 selective composite membranes using Pebax/CuBTC/PEG-ran-PPG ternary system

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Journal of Energy Chemistry 2017年第3期26卷 530-539页

作者： Tayebeh khosravi Mohammadreza Omidkhah Faculty of Chemical Engineering Tarbiat Modares UniversityP.O.Box 14115-143TehranIran

Three phase PebaxMH 1657/PEG-ran-PPG/CuBTC（polymer/liquid/solid） was successfully deposited as a selective layer on a porous Polysulfone（PSF） support. In fact, the beneficial properties of PEG（high selectivity） with those of PPG（high permeability, amorphous） have been combined with superior properties of mixed matrix membrane（MMMs）. The membranes were characterized by DSC, TGA and SEM, while CuBTC was characterized by COand CHadsorption test. Statistically based experimental design（central composite design, CCD） was applied to analyze and optimize the effect of PEG-ran-PPG（10–50 wt%） and CuBTC（0–20 wt%） mass contents on the COpermeance and CO/CHideal selectivity. Based on the regression coefficients of the obtained models, the COpermeance was notably influenced by PEG-ran-PPG,while CuBTC has the most significant effect on the CO/CHideal selectivity. Under the optimum conditions（PEG-ran-PPG: 32.76 wt% and CuBTC: 20 wt%）, nearly 620% increase in the COpermeance and43% enhancement in the CO/CHideal selectivity was observed compared to the neat Pebax. The effect of pressure（3, 9 and 15 bar） on the pure and mixed gas separation performance of the composite membranes was also investigated. The high solubility of COin the membranes resulted in the enhancement of COpermeability with increase in gas pressure.

关键词： CO2 separation Pebax Composite membrane CuBTC PEG-ran-PPG

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Mobile Multimedia Computing in Cyber-Physical Surveillance Services Through UAV-Borne Video-SAR:A Taxonomy of Intelligent Data Processing for IoMT-Enabled Radar Sensor Networks

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Tsinghua Science and Technology 2022年第2期27卷 288-302页

作者： Mohammad R.khosravi Sadegh Samadi Department of Electrical and Electronics Engineering Shiraz University of TechnologyShiraz 313-71555Iran

This study investigates the different aspects of multimedia computing in Video Synthetic Aperture Radar(Video-SAR)as a new mode of radar imaging for real-time remote sensing and *** research also considers new suggestions in the systematic design,research taxonomy,and future trends of radar data *** the conventional modes of SAR imaging,Video-SAR can generate video sequences to obtain online monitoring and green surveillance throughout the day and night(regardless of light sources)in all ***,an introduction to Video-SAR is ***,some specific properties of this imaging mode are ***,this research covers one of the most important aspects of the Video-SAR systems,namely,the systematic design requirements,and also some new types of visual distortions which are different from the distortions,artifacts and noises observed in the conventional imaging *** addition,some topics on the general features and high-performance computing of Video-SAR towards radar communications through Unmanned Aerial Vehicle(UAV)platforms,Internet of Multimedia Things(IoMT),Video-SAR data processing issues,and real-world applications are investigated.

关键词： Video Synthetic Aperture Radar(Video-SAR)imaging radar networks radar image processing high-performance computing Internet of Multimedia Things(IoMT) cybersecurity

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Undrained seismic bearing capacity of strip footing adjacent to a heterogeneous excavation

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Frontiers of Structural and Civil Engineering 2023年第4期17卷 566-583页

作者： Ramin VALI Saeed khosravi Majid BEYGI Department of Civil Engineering Technical and Vocational UniversityTehran ***Iran Department of Mining Engineering Shahid Bahonar University of KermanKerman ***Iran Department of Civil Engineering Yazd UniversityYazd ***Iran

The analysis of the bearing capacity of strip footings sited near an excavation is critical in *** this study,the effects of the geometrical features of the excavation and the soil strength properties on the seismic bearing capacity of a strip footing resting on an excavation were evaluated using the lower and upper bounds of the finite element limit analysis *** effects of the setback distance ratio(L/B),excavation height ratio(H/B),soil strength heterogeneity(kB/cu),and horizontal earthquake coefficient(kh)were *** charts and tables were produced to clarify the relationship between the undrained seismic bearing capacity and the selected parameters.

关键词： excavation finite element limit analysis heterogeneous soil strip footing undrained bearing capacity

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Evaluation of restoration success in arid rangelands of Iran based on the variation of ecosystem services

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Journal of Arid Land 2023年第11期15卷 1290-1314页

作者： Mohsen SHARAFATMANDRAD Azam khosravi MASHIZI Department of Ecological Engineering Faculty of Natural ResourcesUniversity of JiroftJiroft ***Iran

The plantation of non-native species is one of the most expensive ecological restoration measures in arid and semi-arid areas,while its impacts on local communities are largely *** study assessed the rate of change and the dynamic degree of the economic values of ecosystem services related to local conservation(water yield,stocking rate and aesthetic value)and preserving the future(carbon sequestration,soil protection,soil stability and habitat provision)to determine the restoration success of the plantation of non-native species Haloxylon ammodendron(***.)Bunge ex Fenzl(15-and 30-year-old)in parts of arid rangelands of Bardsir region,Kerman Province,*** investigated the impacts of the two plantations on the seven ecosystem services and ecosystem structures(horizontal and vertical structures,vegetation composition and species diversity)based on field sampling and measurements at four sampling sites(i.e.,control,degraded,and 15-and 30-year-old plantation sites)in spring and summer of *** restoration success of the plantation of non-native species was then examined by assessing the rate of change and the dynamic degree of the total economic value of all ecosystem services as well as the rate of change and the dynamic degree of the economic values of ecosystem services for the two groups(local conservation and preserving the future).Although the plantation of non-native species *** enormously improved the vertical and horizontal structures of ecosystems,it failed to increase species diversity and richness ***,despite the plantation of non-native species *** had significantly increased the economic values of all ecosystem services,it was only quite successful in restoring carbon *** analysis showed that plantation age had a significant impact on restoration success directly and indirectly(through changing ecosystem structures and services).The dynamic degree of the economic values of ecosystem services r

关键词： Haloxylon ammodendron restoration success ecosystem services ecosystem structures arid ecosystems path analysis Iran

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Autonomous fault-diagnosis and decision-making algorithm for determining faulty nodes in distributed wireless networks

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Frontiers of Information Technology & Electronic Engineering 2016年第9期17卷 885-896页

作者： Adel khosravi Yousef SEIFI KAVIAN Electrical Engineering Department Faculty of Engineering Shahid Chamran University of Ahvaz

In this paper, we address fault-diagnosis agreement(FDA) problems in distributed wireless networks(DWNs) with arbitrary fallible nodes and healthy access points. We propose a new algorithm to reach an agreement among fault-free members about the faulty ones. The algorithm is designed for fully connected DWN and can also be easily adapted to partially connected networks. Our contribution is to reduce the bit complexity of the Byzantine agreement process by detecting the same list of faulty units in all fault-free members. Therefore, the malicious units can be removed from other consensus processes. Also, each healthy unit detects a local list of malicious units, which results in lower packet transmissions in the network. Our proposed algorithm solves FDA problems in 2t+1 rounds of packet transmissions, and the bit complexity in each wireless node is O(nt+1).

关键词： Fault diagnosis Decision making Byzantine agreement Distributed wireless networks Consensus

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Plant community dynamics in arid lands: the role of desert ants

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Journal of Arid Land 2021年第3期13卷 303-316页

作者： Mohsen SHARAFATMANDRAD Azam khosravi MASHIZI Department of Ecological Engineering Faculty of Natural ResourcesUniversity of JiroftJiroft ***Iran

Ants (Formicidae, Hymenoptera) play an important role in seed bank, seedling establishment andplant composition of arid ecosystems. Thus, knowing plant-ant interaction provides useful information formanagers to design restoration and conservation plans. In this study, the roles of desert harvester ants (Messorintermedius and Messor melancholicus) and scavenger ants (Cataglyphis nodus and Lepisiota semenovi) on plantcommunities were investigated in arid ecosystems of southeastern Iran. Two vegetation types weredistinguished in the study area and the nest density of ant species was determined. Furthermore, plantcomposition and soil seed bank were estimated at different distances from the ant nests. Results showed thatthe density of M. intermedius and M. melancholicus nests was higher in dwarf shrub-shrub vegetation type and thedensity of C. nodus and L. semenovi nests was higher in dwarf shrub vegetation type. The harvester and scavengerants had enhanced the seed bank to 55% and 70%, respectively. Therefore, the role of scavenger ants on theplant communities' seed bank was greater than that of harvester ants. Although the scavenger ants were moreinfluential on the annuals and the invasive plant species, the radius impact of the harvester ants on theperennials was greater, i.e., a positive interaction existed between the perennial plants and the harvester ants. *** and L. semenovi played an important role in enhancing the ecosystem's potential for restoration throughestablishment of pioneer species in early stage of succession. The activity of M. intermedius is crucial for thedevelopment and maintenance of climax plant communities in arid ecosystems through assisting the plantspecies' establishment in late stage of succession. It is essential to preserve the diversity of these key ant speciesfor the maintenance and sustainability of shrubs in arid ecosystems.

关键词： ants ecological succession ecosystem rangelands shrubs vegetation

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Green,mild and efficient bromination of aromatic compounds by HBr promoted by trans-3,5-dihydroperoxy-3,5-dimethyl-1,2-dioxolane in water as a solvent

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Chinese Chemical Letters 2012年第4期23卷 387-390页

作者： Kaveh khosravi Samira Kazemi Department of Chemistry Faculty of ScienceUniversity of Arak Department of Chemistry Shahr-e-Rey branchIslamic Azad University

A combination of HBr and trans-3,5-dihydroperoxy-3,5-dimethyl-1,2-dioxolane as anew and powerful oxidant was found effective for facile brotnination of different aromatic compounds at room temperature in water as a green *** reaction conditions,high selectivity and yield,high reaction rate and non-toxicity are some of the major advantages of this synthetic protocol.

关键词： Trans-3 5-dihydroperoxy-3 5-dimethyl-1 2-dioxolane HBr Bromination Anilines Phenoles

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