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A Method for Directly Counting and Quantitatively Comparing Aggregated Structures during cluster formation

Chinese Journal of Chemical Physics 2021年第2期34卷 137-148,I0001页

作者： Xi Yang Zhong-yuan Lu State Key Laboratory of Supramolecular Structure and Materials Institute of Theoretical ChemistryJilin UniversityChangchun 130021China

Assembling of a few particles into a cluster commonly occurs in many ***,it is still challenging to precisely control particle assembling,due to the various amorphous structures induced by thermal fluctuations during cluster *** these structures may have very different degrees of aggregation,a quantitative method is lacking to describe them,and how these structures evolve remains *** a significant step towards precise control of particle self-assembly is to describe and analyze various aggregation structures during cluster formation *** this work,we are motivated to propose a method to directly count and quantitatively compare different aggregated *** also present several case studies to evaluate how the aggregated structures during cluster formation are affected by external controlling factors,e.g.,different interaction ranges,interaction strengths,or anisotropy of attraction.

关键词： Self-assembly cluster formation Aggregated structures Quantitative analysis

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Mechanism of cluster formation on Cerium Borosilicate Glasses Based on TEM-EDP and SEM-EDEX Investigations

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Journal of Minerals and Materials Characterization and Engineering 2022年第2期10卷 153-162页

作者： Salma Ahmeed Gomaa El Damrawi Physics Department Sirte University Sirte Libya Physics Department Faculty of Science Mansoura University Mansoura Egypt

Cerium oxide has a great capacity to remove nonbridging oxygen atoms (NBO) from the glass network and serves as glass former units. The well formed CeO4 units played the role of decreasing NBO from the silicate network and cause a reduction in the concentration of tetrahedral boron groups (N4). The highest content of NBO in glass of lower CeO2 (1 mol%) has a dominant role in constructing crystalline clusters in the glass. Higher CeO2 concentration leads to formation of an amorphous glass network as documented by XRD and TEM-EDP spectra. Coordination of cerium with oxygen atoms gives uniform units of spherical morphology in the pure CeO2 as well as in cerium rich glass. clustered species has a great benefit in the field of application, used as a shielding material for ionized radiations.

关键词： TEM-EDP SEM-EDEX cluster formation Cerium Borosilicate Glasses

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Fluorescence Behavior and Emission Mechanisms of Poly(ethylene succinamide)and Its Applications in Fe^(3+)Detection and Data Encryption

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Chinese Journal of Polymer Science 2023年第1期41卷 129-142页

作者： Xubao Jiang Qinghui Wang Bin Li Shusheng Li Xiang Zheng Kong College of Chemistry and Chemical Engineering University of JinanJinan250022China Québec Center for Functional Materials Department of ChemistryUniversitéde SherbrookeSherbrookeQCJ1K2R1Canada

Conventional fluorescent polymers are featured by large conjugation *** contrast,a new class of fluorescent polymers without any conjugations is gaining great interest in immerging *** is a typical member of the conjugation-free fluorescent ***,studies on their electrophotonic property are hardly available,although widely used in many ***,poly(ethylene succinamide),PA24,is synthesized;its chemical structure confirmed through multiple techniques(NMR,FTIR,XRD,etc.).PA24 is highly emissive as solid and in its solution at room temperature,and the emission is excitation and concentration dependant,with an unusual blue shift under excitation from 270 nm to 320 nm,a hardly observed phenomenon for all fluorescent *** similar emission behavior is also observed under cryogenic condition at 77 *** emission behavior is thoroughly studied;the ephemeral emission blue-shift is interpreted through Förster resonance energy *** on its structures,the emission mechanism is ascribed to cluster-triggered emission,elucidated from multianalyses(NMR,FTIR,UV absorbance and DLS).In presence of a dozen of competitive metal ions,PA24 emission at 450 nm is selectively quenched by Fe^(3+).PA24 is used as probe for Fe^(3+)and H_(2)O_(2) detections and in data ***,this work provides a novel face of polyamide with great potential applications as sensors in different fields.

关键词： Polyamide Fluorescent emission cluster formation Ferric ion detection Data encryption

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Trusted cluster-Based Communication for Wireless Sensor Network Using Meta-Heuristic Algorithms

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Computer Systems Science & Engineering 2023年第5期45卷 1935-1951页

作者： Pankaj Kumar Sharma Uma Shankar Modani Department of Computer Engineeing Mahila Engineering CollegeAjmerIndia Department of E&C Engineering Engineering CollegeAjmerIndia

The mobile transient and sensor network’s routing algorithm detects available multi-hop paths between source and destination ***,some methods are not as reliable or trustworthy as ***,finding a reliable method is an important factor in improving communication *** further enhancement of protected communication,we suggest a trust cluster based secure routing(TCSR)framework for wireless sensor network(WSN)using optimization ***,we introduce an efficient cluster formation using a modified tug of war optimization(MTWO)algorithm,which provides loadbalanced clusters for energy-efficient data ***,we illustrate the optimal head selection using multiple design constraints received signal strength,congestion rate,data loss rate,and throughput of the *** parameters are optimized by a butterfly optimal deep neural network(BO-DNN),which provides first-level security towards the selection of the best head ***,we utilize the lightweight signcryption to encrypt the data between two nodes during data transmission,which provides second-level *** model provides an estimation of the trust level of each route to help a source node to select the most secure *** nodes of the network improve reliability and security by maintaining the reliability *** results showed that the proposed scheme achieved 45.6%of delivery ratio.

关键词： Trust model WSN secure routing cluster formation load-balanced clusters

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Performance Analysis of Malicious Node Detection and Elimination Using clustering Approach on MANET

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Circuits and Systems 2016年第6期7卷 748-758页

作者： S. Gopalakrishnan P. Mohan Kumar Department of Electronics & Communication Engineering PSNA College of Engineering and Technology Dindigul India Department of Computer Science and Engineering Jeppiaar Engineering College Chennai India

Mobile Ad hoc Network (MANET) is a significant concept of wireless networks which comprises of thousands of nodes that are mobile as well as autonomous and they do not requires any existing network infrastructure. The autonomous nodes can freely and randomly move within the network which can create temporary dynamic network and these networks can change their topology frequently. The security is the primary issue in MANET which degrades the network performance significantly. In this paper, cluster based malicious node detection methodology is proposed to detect and remove the malicious nodes. Each node within the cluster gets the cluster key from the cluster head and this key is used for the data transaction between cluster head and node. The cluster head checks this key for every data transaction from node and match with their cluster table. If match is valid, and then only it will recognize that this node is belongs to this cluster, otherwise it is decided as malicious node. This paper also discusses the detection of link failure due to the presence of malicious node by determining the gain of each link in the network. The performance of the proposed method is analyzed using packet delivery ratio, network life time, and throughput and energy consumption. The proposed malicious node detection system is compared with the conventional techniques as OEERP (Optimized energy efficient routing protocol), LEACH (Low energy adaptive clustering hierarchy), DRINA (Data routing for In-network aggregation) and BCDCP (Base station controlled dynamic clustering protocol).

关键词： Malicious Node cluster formation MANET cluster Head

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