检索结果-南通市图书馆

Parametric study on the mixed solvent synthesis of ZIF-8 nano- and micro-particles for CO adsorption: A response surface study

在线全文

学校读者我要写书评

暂无评论

Frontiers of Chemical Science and Engineering 2020年第4期14卷 579-594页

作者： alireza Hadi Javad Karimi-Sabet Abolfazl Dastbaz Department of Chemical Engineering Faculty of EngineeringUniversity of TehranTehranIran Material and Nuclear Fuel Research School(MNFRS) Nuclear Science and Technology Research InstituteTehranIran

The room temperature synthesis of ZIF-8 micro-and nano-particles was investigated using a mixed methanol-water solvent ***-8 particles of good quality and high crystallinity were *** surface methodology was used to determine the effect of the synthesis conditions on the ZIF-8 yield,particle size distribution,and mean particle *** ligand/metal salt molar ratio followed by the amount of sodium formate(the deprotonating agent)and then the amount of water(i.e,the composition of the mixed solvent)respectively had the largest effects on both the ZIF-8 yield and particle *** showed that mixing of solvents with different strengths in producing ZIF-8 crystals is a practical method to size-controlled synthesis of ZIF-8 *** method is more favorable for industrial-scale ZIF-8 synthesis than using excess amounts of ligands or chemical additives(like sodium formate).In addition,ZIF-8 samples with different mean particle sizes(100,500,and 1000 nm)were used for CO adsorption and the mid-sized ZIF-8 particles had the highest adsorption capacity.

关键词： metal organic frameworks zeolitic imidazo-late frameworks ZIF-8 response surface methodology Box Behnken design CO adsorption

Qubit movement-assisted entanglement swapping

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics B 2020年第5期29卷 92-100页

作者： Sare Golkar Mohammad Kazem Tavassoly alireza Nourmandipour Atomic and Molecular Group Faculty of PhysicsYazd UniversityYazd 89195-741Iran Photonic Research Group Engineering Research CenterYazd UniversityYazd 89195-741Iran Department of Physics Faculty of ScienceSirjan University of TechnologySirjanIran

We propose a scheme to generate entanglement between two distant qubits(two-level atom)which are separately trapped in their own(in general)non-Markovian dissipative cavities by utilizing entangling swapping,considering the case in which the qubits can move along their cavity axes rather than a static state of *** first examine the role of movement of the qubit by studying the entropy evolution for each *** average entropy over the initial states of the qubit is *** by performing a Bell state measurement on the fields leaving the cavities,we swap the entanglement between qubit-field in each cavity into qubit-qubit and field-field *** entangling power is used to measure the average amount of swapped entanglement over all possible pure initial *** results are presented in two weak and strong coupling regimes,illustrating the positive role of movement of the qubits on the swapped *** is revealed that by considering certain conditions for the initial state of qubits,it is possible to achieve a maximally long-leaving stationary entanglement(Bell state)which is entirely independent of the environmental variables as well as the velocity of *** happens when the two qubits have the same velocities.

关键词： dissipative systems quantum entanglement entanglement swapping

Secure ticket-based authentication method for IoT applications

在线全文

学校读者我要写书评

暂无评论

Digital Communications and Networks 2023年第3期9卷 710-716页

作者： Mojtaba Alizadeh Mohammad Hesam Tadayon alireza Jolfaei Computer Engineering Department Lorestan UniversityKhorramabadIran Iran Telecommunication Research Center(ITRC) TehranIran Department of Computing Macquarie UniversitySydneyAustralia

The recent surge in the number of machines,appliances,and services connected to the Internet demands secure processing and transmission of sensory *** plays a crucial role in a typical security model used in the Internet of Things(IoT),and it protects data communications from various attacks,such as impersonation and denial of service,by verifying and allowing legitimate users to access the IoT ***,recent authentication literature has not addressed the need for developing a scalable and efficient authentication method in this *** paper proposes a secure and anonymous ticket-based authentication method for the *** proposed method protects the network from various security and privacy threats such as data alternation and denial of service while also offering mutual authentication and sensor *** security and performance evaluations confirm the improvement.

关键词： IoT Internet of things Authentication Privacy Security

The power of microsatellite markers and AFLPs in revealing the genetic diversity of Hashemi aromatic rice from Iran

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Integrative Agriculture 2016年第6期15卷 1186-1197页

作者： alireza Tarang Anahita Bakhshizadeh Gashti Gilan Branch Agricultural Biotechnology Research Institute of Iran/Agricultural Research Education and Extension Organization (AREO)

Hashemi, a popular aromatic rice among Iranians, is famous for its fragrance and taste. Such features are major reasons for its higher price compared to non-aromatic varieties available in Iran. Therefore, the knowledge of genetic diversity of this profitable crop is a fundamental ineterst for plant breeders in future breeding programs. In the present research, genetic diversity among 35 genotypes of Hashemi aromatic rice （Oryza sativa L.） from Guilan and Mazandaran provinces of Iran was estimated using simple sequence repeat （SSR） and amplified fragment length polymorphism （AFLP） markers. Out of 21 SSR and 12 EcoRI-Msel AFLP marker combinations, only 16 SSRs and 10AFLPs exhibited polymorphic patterns while others were monomorphic. The 10 AFLP primer combinations produced a total of 142 of bands and 20 were polymorphic （14.08%）. Moreover, 40 out of 47 bands amplified with 16 SSR markers showed polymorphism （85.1%）. The average num- ber of alleles identified by SSR primers was 2.56 alleles per locus with a range of 2 to 4. The average value of polymorphic information content （PIC） was 0.393 and 0.468 for AFLP and SSR markers, respectively. However, the genetic similarity values ranged from 0.26 to 1 for SSRs and 0.21 to 1 forAFLPs. Later, a unweighted pair group method with arithmetic mean （UPGMA） dendrogram was generated and genotypes were clustered into four groups with SSRs at similarity coefficient of 0.55 while AFLPs clustered them into six groups at similarity coefficient of 0.41. Cluster analysis revealed a narrow genetic diversity and low correlation between geographical differentiation and genetic distance within cultivars.

关键词： Hashemi aromatic rice genetic diversity SSR AFLP

Electron-acoustic supernonlinear waves and their multistability in the framework of the nonlinear Schrödinger equation

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2020年第7期72卷 71-80页

作者： alireza Abdikian Jharna Tamang Asit Saha Department of Physics Malayer UniversityMalayer 65719-95863Iran Department of Mathematics Sikkim Manipal Institute of TechnologySikkim Manipal UniversityMajitarRangpoEast-Sikkim 737136India

Finite-amplitude supernonlinear electron-acoustic waves(EAWs)are investigated under the nonlinear Schrödinger(NLS)equation in a plasma system that is composed of cold electronfluid,immobile ions and q-nonextensive hot *** the wave transfiguration,the NLS equation is deduced in a dynamical *** presence of finite-amplitude nonlinear and supernonlinear EAWs is shown by phase plane *** effects of the nonextensive parameter(q)and the speed of waves(v)on different traveling wave solutions of EAWs are ***,by introducing a small external periodic force in the dynamical system,multistability behaviors of EAWs under the NLS equation are shown for the first time in classical plasmas.

关键词： electron-acoustic wave dynamical system phase plane analysis nonextensive plasma

Bending Efficiency of Bent Multiple-Slot Waveguides

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2009年第12期26卷 118-121页

作者： Hamid Keivani alireza Kargar Department of Electrical and Electronic Engineering Islamic Azad University Kazerun Branch Kazerun Iran Department of Electrical and Computer Engineering Shiraz University Shiraz *** Iran

The bending efficiency of three-dimensional bent multiple-slot waveguides is studied by applying a combined method of effective-index and modified transfer-matrix methods. The effects of asymmetric structure, asymmetric slots, and asymmetric middle strips on the bending efficiency are investigated. We show that the bending efficiency can be improved by the use of asymmetric structures and asymmetric middle strips. The bending efficiency of different slot waveguides （up to quintuple-slot structure） is compared. It is revealed that although the single-slot waveguide in general provides the lowest bending loss for the same waveguide parameters, it is possible that the multiple-slot waveguide can present a lower bending loss than the single-slot one.

关键词： Electronics and devices Optics quantum optics and lasers

Fracture analyses of different pre-holed concrete specimens under compression

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Mechanica Sinica 2015年第6期31卷 855-870页

作者： Hadi Haeri alireza Khaloo Mohammad Fatehi Marji Department of Civil Engineering Sharif University of Technology Member of National Elites Foundation Center of Excellence in Structure and Earthquake Engineering Sharif University of Technology Mine Exploitation Engineering Department Faculty of Mining and Metallurgy Yazd University

Crack propagation processes in specially prepared concrete discs and rectangular specimens containing a single cylindrical hole or multiple holes of varying diameters have been studied both experimentally and numerically. In this research, the cracks coalescence paths in Brazilian disc and rectangular specimens made from rock-like material containing multi-holes are investigated. These concrete specimens are specially prepared from an appropriate mixture of Portland Pozzolana Cement （PPC）, fine sands, and water. The pre-holed Brazilian discs and rectangular specimens are experimentally tested under compression. The breakage load in the ring type disc specimens containing an axial hole with varying diameters is measured and the distribution of the induced lateral stress is obtained. The mechanism of cracks propagation in the wall of the ring type specimens is also stud- ied. In the case of multi-hole Brazilian disc and rectangular specimens, the cracks propagation and cracks coalescence are also investigated. These experiments are numerically modeled by a modified higher order displacement discontinuity method. It has been shown that the corresponding experimental and numerical results are in good agreement with each other. The results presented in this research vali date the accuracy and applicability of these crack analyses procedures.

关键词： Concrete rings Pre-holed Brazilian disc ·Rectangular specimens Crack analyses Coalescence ·Induced lateral stress

Development of fragility curves by incorporating new spectral shape indicators and a weighted damage index:case study of steel braced frames in the city of Mashhad,Iran

在线全文

学校读者我要写书评

暂无评论

Earthquake Engineering and Engineering Vibration 2017年第2期16卷 383-395页

作者： Hamid Kazemi Mohsen Ghafory-Ashtiany alireza Azarbakht Department of Civil Engineering Science and Research Branch Islamic Azad University Tehran Iran International Institute of Earthquake Engineering and Seismology (IIEES) Tehran Iran Department of Civil Engineering Faculty of Engineering Arak University Arak Iran

In this study, strong ground motion record （SGMR） selection based on Eta （~/） as a spectral shape indicator has been investigated as applied to steel braced flame structures. A probabilistic seismic hazard disaggregation analysis for the definition of the target Epsilon （ε） and the target Eta （η） values at different hazard levels is presented, taking into account appropriately selected SGMR＇s. Fragility curves are developed for different limit states corresponding to three representative models of typical steel braced frames having significant irregularities in plan, by means of a weighted damage index. The results show that spectral shape indicators have an important effect on the predicted median structural capacities, and also that the parameter r/is a more robust predictor of damage than searching for records with appropriate c values.

关键词： vulnerability spectral shape indicator incremental dynamic analysis damage index hazard disaggregation record selection

Determinants of Adaptation to Climate Change:A Case Study of Rice Farmers in Western Province,Iran

在线全文

学校读者我要写书评

暂无评论

Chinese Geographical Science 2022年第1期32卷 110-126页

作者： JAMSHIDI alireza JAMSHIDI Masomeh ABADI Bijan Department of Geography Faculty of Literature and HumanitiesUrmia UniversityUrmia 57561-51818Iran Department of Entrepreneurship and Rural Development Ham UniversityHam 14666-64891Iran Department of Biosystem Mechanics Engineering Faculty of AgricultureUniversity of MaraghehMaragheh 55181-83111Iran

The decisions made by agricultural households to adjust to climate change(CC)in Iran are not well *** study is intended to investigate the influence of perceptions and socioeconomic,institutional features on farmers’adaptation decisions about CC,which constitute the hypothetical statements of the *** undertook a survey of 200 farm householders from 31 villages of Ilam Province,situated in the western Iran,as randomly *** result discloses that the proposed discriminant model matches the dataset well,with a strong effect size of partial eta-squared(η^(2)=0.38).The analysis further signals that adapters are younger and more welleducated than *** are also knowledgeable about CC risks and institutional policy *** adapters have subsidiary work,better access to credit,and have good contacts with expansion agents and *** paper concludes that government authorities should provide farmers with the enriched capabilities and competencies enabling them to adapt to CC.

关键词： climate change(CC) drought adaptation management rice farmers Iran