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Deployment of Polar Codes for Mission-Critical Machine-Type Communication Over Wireless Networks

Computers, Materials & Continua 2022年第4期71卷 573-592页

作者： Najib Ahmed Mohammed Ali Mohammed Mansoor rodina Binti ahmad Saaidal Razalli Bin Azzuhri Department of Software Engineering Faculty of Computer Science and Information TechnologyUniversity of Malaya50603Kuala Lumpur Malaysia 2Department of Computer System&TechnologyFaculty of Computer Science and Information TechnologyUniversity of Malaya50603Kuala LumpurMalaysia

Mission critical Machine-type Communication(mcMTC),also referred to as Ultra-reliable Low Latency Communication(URLLC),has become a research *** is primarily characterized by communication that provides ultra-high reliability and very low latency to concurrently transmit short commands to a massive number of connected *** the reduction in physical(PHY)layer overhead and improvement in channel coding techniques are pivotal in reducing latency and improving reliability,the current wireless standards dedicated to support mcMTC rely heavily on adopting the bottom layers of general-purpose wireless standards and customizing only the upper *** mcMTC has a significant technical impact on the design of all layers of the communication protocol *** this paper,an innovative bottom-up approach has been proposed for mcMTC applications through PHY layer targeted at improving the transmission reliability by implementing ultra-reliable channel coding scheme in the PHY layer of IEEE 802.11a standard bearing in mind short packet transmission *** achieve this aim,we analyzed and compared the channel coding performance of convolutional codes(CCs),low-density parity-check(LDPC)codes,and polar codes in wireless network on the condition of short data packet *** Viterbi decoding algorithm(VA),logarithmic belief propagation(Log-BP)algorithm,and cyclic redundancy check(CRC)successive cancellation list(SCL)(CRC-SCL)decoding algorithm were adopted to CC,LDPC codes,and polar codes,***,a new PHY layer for mcMTC has been *** reliability of the proposed approach has been validated by simulation in terms of Bit error rate(BER)and packet error rate(PER)***-to-noise ratio(SNR).The simulation results demonstrate that the reliability of IEEE 802.11a standard has been significantly improved to be at PER=10−5 or even better with the implementation of polar *** results also show that the general-purpose wireless net

关键词： Machine-type communication mission-critical applications MTC URLLC M2M wireless networks polar codes

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OffSig-SinGAN: A Deep Learning-Based Image Augmentation Model for Offline Signature Verification

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Computers, Materials & Continua 2023年第7期76卷 1267-1289页

作者： M.Muzaffar Hameed rodina ahmad Laiha Mat Kiah Ghulam Murtaza Noman Mazhar Faculty of Computer Science and Information Technology University of MalayaKuala Lumpur46400Malaysia Department of Computer Science Bahauddin Zakariya UniversityMultan60000Pakistan Department of Computer Science Sukkur Institute of Business Administration UniversitySukkur65200Pakistan

Offline signature verification(OfSV)is essential in preventing the falsification of *** learning(DL)based OfSVs require a high number of signature images to attain acceptable ***,a limited number of signature samples are available to train these models in a real-world *** researchers have proposed models to augment new signature images by applying various ***,on the other hand,have used human neuromotor and cognitive-inspired augmentation models to address the demand for more signature ***,augmenting a sufficient number of signatures with variations is still a challenging *** study proposed OffSig-SinGAN:a deep learning-based image augmentation model to address the limited number of signatures problem on offline signature *** proposed model is capable of augmenting better quality signatures with diversity from a single signature image *** is empirically evaluated on widely used public datasets;*** quality of augmented signature images is assessed using four metrics like pixel-by-pixel difference,peak signal-to-noise ratio(PSNR),structural similarity index measure(SSIM),and frechet inception distance(FID).Furthermore,various experiments were organised to evaluate the proposed image augmentation model’s performance on selected DL-based OfSV systems and to prove whether it helped to improve the verification accuracy *** results showed that the proposed augmentation model performed better on the GPDSsyntheticSignature dataset than other augmentation *** improved verification accuracy rate of the selected DL-based OfSV system proved the effectiveness of the proposed augmentation model.

关键词： Signature forgery detection offline signature verification deep learning image augmentation generative adversarial networks

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马克西莫夫绘画艺术研究

马克西莫夫绘画艺术研究

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作者：卡佳（rodina Ekaterina）中国美术学院

学位级别：硕士

本文是对康斯坦丁·米弗基叶维奇·马克西莫夫的艺术创作、生活与教学工作展开的详细研究。本文写作的主要目的是将马克西莫夫的艺术完整地呈现给世人,同时填补了前人对他创作与生活研究的疏漏,从而解决了目前对马克西莫夫缺少完整性研... 详细信息

本文是对康斯坦丁·米弗基叶维奇·马克西莫夫的艺术创作、生活与教学工作展开的详细研究。本文写作的主要目的是将马克西莫夫的艺术完整地呈现给世人,同时填补了前人对他创作与生活研究的疏漏,从而解决了目前对马克西莫夫缺少完整性研究的问题。本文是以在俄罗斯和中国收集到的所有材料为依据,以苏联画家和教育家马克西莫夫与其同代人撰写的中俄文资料,以及他的中国学生与俄罗斯朋友的采访资料为基础,并对其进行了分析与梳理,是自画家去世以后关于他最全面的撰写。本文讲述了马克西莫夫创作与中国艺术的相互影响。介绍了马克西莫夫在中国工作时对中国油画和美术教育体系发展的影响,同时中国也为马克西莫夫后来的艺术创作带来了灵感。本文包含了马克西莫夫关于绘画艺术的想法与批评家们对他的评价,利于将来对马克西莫夫的艺术创作进行更完整的相关研究。

关键词：马克西莫夫马训班苏联绘画中国油画

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Kinetics and Mechanism of Spontaneous Crystallization of Potassium Nitrate from Its Supersaturated Aqueous Potassium Nitrate from Its Supersaturated Aqueous Solutions

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Crystal Structure Theory and Applications 2013年第1期2卷 16-27页

作者： Oleg D. Linnikov Irina V. rodina Igor G. Grigorov Evgeniy V. Polyakov Institute of Solid State Chemistry Ural Branch of the Russian Academy of Sciences Ekaterinburg Russia

Kinetics of spontaneous crystallization of potassium nitrate from its supersaturated aqueous solutions has been studied simultaneously by electrical conductance and optical transmittance methods. It was found that spontaneous crystallization of potassium nitrate was accompanied by aggregation of crystals. Growth of salt crystals was in the kinetic mode of the growth process, and was described by the equation of the first order regarding supersaturation of solution. The mechanism of aggregation and intergrowth of crystals during bulk crystallization via formation of nucleus-bridges between crystals found earlier for several salts was confirmed. Specific surface energy of potassium nitrate was evaluated on the basis of the above mechanism of aggregation and intergrowth of crystals. The established value of the specific surface energy was reasonable and agreed satisfactorily with the available literature data. Examination of crystal deposit after completion of crystallization allowed detecting crystal agglomerates of freakish and irregular forms, which may be considered as the direct confirmation of the above mechanism of intergrowth of crystals. Kinetics of crystallization, aggregation and size distribution of salt crystals after completion of crystallization have been satisfactory described by the earlier proposed model of the crystallization process. An excellent agreement was established between the experimental data on potassium nitrate solubility in aqueous solutions found in the present work and those available in the literature.

关键词： Potassium Nitrate Aggregation Crystallization Solubility Activation Energy Crystal Growth Intergrowth Agglomerates

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赫尔岑与屠格涅夫的“汉尼拔誓言”：神话与现实

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俄罗斯文艺 2018年第2期 12-21页

作者：瓦·卢金娜[俄] 刘雅仪不详湖南师范大学外国语学院俄语系

本文探讨的是两个誓言的发展始末,这两个誓言是赫尔岑和屠格涅夫这两位为解放农奴做出了巨大贡献的作家在年少时许下并坚守了一生的誓言。文章重点阐明了屠格涅夫"汉尼拔誓言"的起誓时间和状况,目前该誓言是否存在,正受到一些研究者的怀... 详细信息

本文探讨的是两个誓言的发展始末,这两个誓言是赫尔岑和屠格涅夫这两位为解放农奴做出了巨大贡献的作家在年少时许下并坚守了一生的誓言。文章重点阐明了屠格涅夫"汉尼拔誓言"的起誓时间和状况,目前该誓言是否存在,正受到一些研究者的怀疑,它常被看做是作者晚期艺术思想的成果,是作者对自身创作"原则"的独特性评价。本文涉及到对屠格涅夫往后命运产生了重要影响的事件,即1838—1839年在国外认识并结交了Н.В.斯坦科维奇及他的"柏林小组"^(1);特别值得一提的是,本文还研究了一种假设,即屠格涅夫不仅认识小组中的人,而且还参加了他们的活动。根据Я.М.涅韦罗夫的回忆,他们向Н.В.斯坦科维奇做出了为人民教育和解放事业做出力所能及的贡献之"庄严承诺"。

关键词： “汉尼拔誓言”农奴制斯坦科维奇屠格涅夫的世界观

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