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Engineering of multiple bound states in the continuum by latent representation of freeform structures

Photonics Research 2021年第4期9卷 I0016-I0023页

作者： Ronghui Lin zahrah alnakhli Xiaohang Li Advanced Semiconductor Laboratory King Abdullah University of Science and Technology(KAUST)Thuwal 23955-6900Saudi Arabia

We demonstrate a neural network capable of designing on-demand multiple symmetry-protected bound states in the continuum(BICs)in freeform structures with predefined *** latent representation of the freeform structures allows the tuning of the geometry in a differentiable,continuous *** show the rich band inversion and accidental degeneracy in these freeform structures by interacting with the latent representation ***,a high design accuracy is demonstrated for arbitrary control of multiple BIC frequencies by using a photonic property readout network to interpret the latent representation.

关键词： representation continuum differentiable

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TBDDoSA-MD:Trust-Based DDoS Misbehave Detection Approach in Software-defined Vehicular Network(SDVN)

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Computers, Materials & Continua 2021年第12期69卷 3513-3529页

作者： Rajendra Prasad Nayak Srinivas Sethi Sourav Kumar Bhoi Kshira Sagar Sahoo Nz Jhanjhi Thamer A.Tabbakh zahrah A.Almusaylim Department of CSE Government College of Engineering(BPUT UniversityRourkela)Kalahandi766002India Department of CSE Indira Gandhi Institute of Technology(BPUT University Rourkela) Sarang759146India Department of CSE Parala Maharaja Engineering College(BPUT University Rourkela)Berhampur761003India Department of CSE SRM UniversityAmaravati522502APIndia School of Computer Science and Engineering Taylor’s UniversitySubang Jaya47500Malaysia Material Research Science Institute King Addulaziz City for Science and Technology(KACST)Riyad6086Kingdom of Saudi Arabia King Addulaziz City for Science and Technology(KACST) Riyad6086Kingdom of Saudi Arabia

Reliable vehicles are essential in vehicular networks for effective *** vehicles in the network are dynamic,even a short span of misbehavior by a vehicle can disrupt the whole network which may lead to catastrophic *** this paper,a Trust-Based Distributed DoS Misbehave Detection Approach(TBDDoSA-MD)is proposed to secure the Software-Defined Vehicular Network(SDVN).A malicious vehicle in this network performs DDoS misbehavior by attacking other vehicles in its *** uses the jamming technique by sending unnecessary signals in the network,as a result,the network performance *** vehicles in that network will no longer meet the service requests from other ***,in this paper,we proposed an approach to detect the DDoS misbehavior by using the trust values of the *** values are calculated based on direct trust and recommendations(indirect trust).These trust values help to decide whether a vehicle is legitimate or *** simply discard the messages from malicious vehicles whereas the authenticity of the messages from legitimate vehicles is checked further before taking any action based on those *** performance of TBDDoSA-MD is evaluated in the Veins hybrid simulator,which uses OMNeT++and Simulation of Urban Mobility(SUMO).We compared the performance of TBDDoSA-MD with the recently proposed Trust-Based Framework(TBF)scheme using the following performance parameters such as detection accuracy,packet delivery ratio,detection time,and energy *** results show that the proposed work has a high detection accuracy of more than 90%while keeping the detection time as low as 30 s.

关键词： Software-defined vehicular network trust evaluator node denial of service misbehavior

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Solvothermal Synthesis of Polyhedron Cobalt Nanomaterials

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Computer Aided Drafting,Design and Manufacturing 2010年第1期20卷 78-82页

作者： ALHALILI zahrah School of Chemistry and Environment Beijing University of Aeronautics and Astronautics

Co nanostructure tetradecahedron shape like were prepared via a simple solvothermal route. The shape and size of Co nanopolyhedron were tuned by changing the volume composition of the solvents and the synthesis temperature. Phase purity was confirmed by X-ray diffraction （XRD） and crystal size was determined by scanning electron microscopy （SEM）. The magnetic hysteresis loops of the polyhedron wareneasured using a SQUID magnetometer at 5 and 300 K. The results show ferromagnetic characteristics with coercivities of 22 and 15 Oe, respectively.

关键词： fabrication polyhedron cobalt nanomaterials magnetic

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A Vicenary Analysis of SARS-CoV-2 Genomes

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Computers, Materials & Continua 2021年第12期69卷 3477-3493页

作者： Sk Sarif Hassan Ranjeet Kumar Rout Kshira Sagar Sahoo Nz Jhanjhi Saiyed Umer Thamer A.Tabbakh zahrah A.Almusaylim Department of Mathematics Pingla Thana MahavidyalayaPaschim Medinipur721140India Computer Science&Engineering National Institute of Technology SrinagarHazratbal190006J&KIndia Department of Computer Science and Engineering SRM UniversityAmaravatiAP522502India School of Computer Science and Engineering Taylor’s UniversitySubang Jaya47500Malaysia Department of Computer Science and Engineering Aliah UniversityKolkataIndia Materials Science Research Institute King Addulaziz City for Science and Technology(KACST)Riyad6086Kingdom of Saudi Arabia General Administration of Research and Development Laboratories King Abdulaziz City for Science and Technology(KACST)Riyad6086Kingdom of Saudi Arabia

Coronaviruses are responsible for various diseases ranging from the common cold to severe infections like the Middle East syndromes and the severe acute respiratory ***,a new coronavirus strain known as COVID-19 developed into a pandemic resulting in an ongoing global public health ***,there is a need to understand the genomic transformations that occur within this family of viruses in order to limit disease spread and develop new therapeutic *** nucleotide sequences of SARS-CoV-2 are consist of several *** bases can be classified into purines and pyrimidines according to their chemical *** include adenine(A)and guanine(G),while pyrimidines include cytosine(C)and tyrosine(T).There is a need to understand the spatial distribution of these bases on the nucleotide sequence to facilitate the development of antivirals(including neutralizing antibodies)and epitomes necessary for vaccine *** study aimed to evaluate all the purine and pyrimidine associations within the SARS-CoV-2 genome sequence by measuring mathematical parameters including;Shannon entropy,Hurst exponent,and the nucleotide guanine-cytosine *** Shannon entropy is used to identify closely associated *** Hurst exponent is used to identifying the auto-correlation of purine-pyrimidine bases even if their organization *** frequency patterns can be used to determine the distribution of all four proteins and the density of each *** GC-content is used to understand the stability of the *** relevant genome sequences were extracted from the National Center for Biotechnology Information(NCBI)virus ***,the phylogenetic properties of the COVID-19 virus were characterized to compare the closeness of the COVID-19 virus with other coronaviruses by evaluating the purine and pyrimidine distribution.

关键词： Fractal dimension shannon entropy hurst exponent GCcontent SARS-CoV-2

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印尼学习者汉语条件复句的习得研究

印尼学习者汉语条件复句的习得研究

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作者： TIKA MUTIA zahrah（穆帝卡）福建师范大学

学位级别：硕士

条件复句是汉语中使用频率相当高的一种复句句式,由于其在语义、句式、语用及搭配使用等方面具有着一定的复杂性,因此对于母语非汉语者而言是较难掌握的语法点,印尼汉语学习者也不例外。为了更好地了解汉语条件复句与印尼语相关表达式... 详细信息

条件复句是汉语中使用频率相当高的一种复句句式,由于其在语义、句式、语用及搭配使用等方面具有着一定的复杂性,因此对于母语非汉语者而言是较难掌握的语法点,印尼汉语学习者也不例外。为了更好地了解汉语条件复句与印尼语相关表达式的异同点,本文选取汉语条件复句和印尼语相关表达式的比较作为研究对象,从结构、语义以及语用等方面进行多方面的研究及探讨,并通过北京语言大学HSK语料库和设计调查问卷来考察印尼汉语学习者使用条件复句的偏误情况以及归纳出偏误类型以及分析偏误来源,同时基于对比和偏误分析的结果,得出印尼学习者汉语条件复句的习得情况。最后,为汉语条件复句的教学以及为印尼学习者学习汉语提供一些建议。

关键词：条件复句印尼学习者对比分析偏误分析习得研究

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Hairy Polyp of the Oropharynx: An Unusual Cause of Choking, Feeding Problems in a Newborn

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International Journal of Otolaryngology and Head & Neck Surgery 2022年第2期11卷 75-81页

作者： Giridhar Guntreddi Jayasree Vasudevan Nair zahrah Taufique Swayam P. Nirujogi SANFORD Medical Center Bemidji MN USA Des Moines University Des Moines IA USA University of Minnesota Medical School Duluth MN USA Sutter Health Jackson CA USA Pediatrics ENT/Craniofacial Surgery Fellow Minneapolis MN USA Family Medicine PGY-2 Tower Health Reading Hospital West Reading PA USA

Hairy polyp is an unusual, rare benign developmental malformation of neonates and infants. Embryologically, they are benign lesions containing of both ectodermal and mesodermal origin. Based on size, location of the lesion, they can produce symptoms such as feeding difficulties, airway obstructions, apneic episodes. We present a case of hairy polyp at Oro/Nasopharynx causing feeding difficulties immediately after birth. We explained the mode of presentation, imaging studies, treatment, and review of literature of congenital hairy polyp/choristoma.

关键词： HP-Hairy Polyp MRI-Magnetic Resonance Imaging CT-Computed Tomography ET-Endotracheal Tube SP-Soft Palate FS-Fibrous Stalk Choristoma Stridor Choking

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