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Comprehensive literature review on the radiographic findings, imaging modalities, and the role of radiology in the COVID-19 pandemic

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World Journal of Radiology 2021年第9期13卷 258-282页

作者： Aman Pal Abulhassan Ali Timothy R Young Juan Oostenbrink Akul Prabhakar Amogh Prabhakar Nina Deacon Amar Arnold Ahmed Eltayeb charles yap David M Young Alan Tang Subramanian Lakshmanan Ying Yi Lim Martha Pokarowski Pramath Kakodkar School of Medicine National University of Ireland GalwayGalway H91 TK33GalwayIreland Department of Computer Science Yale UniversityNew HavenCO 06520United States Department of Health Science Duke UniversityDurhamNC 27708United States The Hospital for Sick Kids University of TorontoToronto M5SOntarioCanada

Since the outbreak of the coronavirus disease 2019(COVID-19)pandemic,over 103214008 cases have been reported,with more than 2231158 deaths as of January 31,*** the gold standard for diagnosis of this disease remains the reverse-transcription polymerase chain reaction of nasopharyngeal and oropharyngeal swabs,its false-negative rates have ignited the use of medical imaging as an important adjunct or *** imaging assists in identifying the pathogenesis,the degree of pulmonary damage,and the characteristic features in each imaging *** literature review collates the characteristic radiographic findings of COVID-19 in various imaging modalities while keeping the preliminary focus on chest radiography,computed tomography(CT),and ultrasound *** the higher sensitivity and greater proficiency in detecting characteristic findings during the early stages,CT scans are more reliable in diagnosis and serve as a practical method in following up the disease time *** research rapidly expands,we have emphasized the CO-RADS classification system as a tool to aid in communicating the likelihood of COVID-19 suspicion among healthcare ***,the utilization of other scoring systems such as MuLBSTA,Radiological Assessment of Lung Edema,and Brixia in this pandemic are reviewed as they integrate the radiographic findings into an objective scoring system to risk stratify the patients and predict the severity of ***,current progress in the utilization of artificial intelligence via radiomics is ***,the lesson from the first wave and preparation for the second wave from the point of view of radiology are summarized.

关键词： Coronavirus COVID-19 Computed tomography Ultrasound MuLBSTA Scoring system Radiological Assessment of Lung Edema classification Brixia score

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Artificial Intelligence Based MPPT Techniques for Solar Power System: A review

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Journal of Modern Power Systems and Clean Energy 2020年第6期8卷 1043-1059页

作者： Kah Yung yap charles R.Sarimuthu Joanne Mun-Yee Lim the Department of Electrical and Computer Systems Engineering(ECSE) School of EngineeringMonash UniversitySubang JayaMalaysia

In the last decade,artificial intelligence(AI)techniques have been extensively used for maximum power point tracking(MPPT)in the solar power *** is because conventional MPPT techniques are incapable of tracking the global maximum power point(GMPP)under partial shading condition(PSC).The output curve of the power versus voltage for a solar panel has only one GMPP and multiple local maximum power points(MPPs).The integration of AI in MPPT is crucial to guarantee the tracking of GMPP while increasing the overall efficiency and performance of *** selection of AI-based MPPT techniques is complicated because each technique has its own merits and *** general,all of the AI-based MPPT techniques exhibit fast convergence speed,less steady-state oscillation and high efficiency,compared with the conventional MPPT ***,the AI-based MPPT techniques are computationally intensive and costly to ***,the hybrid MPPT is favorable in terms of the balance between performance and complexity,and it combines the advantages of conventional and AI-based MPPT *** this paper,a detailed comparison of classification and performance between 6 major AI-based MPPT techniques have been made based on the review and MATLAB/Simulink simulation *** merits,open issues and technical implementations of AI-based MPPT techniques are *** intend to provide new insights into the choice of optimal AI-based MPPT techniques.

关键词： Maximum power point tracking(MPPT) artificial intelligence(AI) fuzzy logic control(FLC) artificial neural network(ANN) genetic algorithm(GA) swarm intelligence(SI) machine learning(ML)

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Fuzzy Logic Controller-based Synchronverter in Grid-connected Solar Power System with Adaptive Damping Factor

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Chinese Journal of Electrical Engineering 2021年第2期7卷 37-49页

作者： Kah Yung yap Chee Ming Beh charles R.Sarimuthu Department of Electrical and Computer Systems Engineering(ECSE) School of EngineeringMonash University MalaysiaSubang Jaya 47500Malaysia

In recent years,renewable energy sources,specifically solar power systems,have developed rapidly owing to their technological maturity and cost ***,its grid integration deteriorates frequency stability because of insufficient rotating masses and inertial ***,a synchronverter,which is an inverter that mimics the operation of a synchronous generator,is crucial to interface solar power in a power *** stabilizes the power grid by emulating a virtual ***,a conventional proportional-integral(PI)-based synchronverter is not equipped with an adaptive damping factor(Dp)or a digitalized smart controller to manage fast-responding solar ***,a novel fuzzy logic controller(FLC)framework is proposed such that the synchronverter can operate in a grid-connected solar power *** this study,Dp is controlled in real time using an FLC to achieve balance between speed and stability for frequency error correction based on frequency *** of four case studies performed in Matlab/Simulink show that the proposed FLC-based synchronverter can stabilize the grid frequency by reducing the frequency deviation by at least 0.2 Hz(0.4%),as compared with the conventional PI-based synchronverter.

关键词： Fuzzy logic controller(FLC) synchronverter renewable energy system(RES) grid stability solar power system

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Interpretation of locally high gravity anomalies using terrestrial gravity data in Bagodo, North Cameroon

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Earth and Planetary Physics 2022年第4期6卷 378-384页

作者： Apollinaire Bouba Kasi Njeudjang Loudi yap Bouba Saidou Joseph Kamguia Tabod charles Tabod Department of Physics Higher Teachers’Training CollegeUniversity of MarouaCameroon Department of Quality Industrial Safety and Environment National Advanced School of Mines and Petroleum IndustriesUniversity of MarouaCameroon Research Laboratory in Geodesy National Institute of CartographyYaoundéCameroon Department of Physics Faculty of ScienceUniversity of MarouaCameroon Department of Physics Faculty of ScienceUniversity of Yaounde ICameroon

In this work,we interpreted gravity data to determine the structural characteristics responsible for high-gravity anomalies in Bagodo,North *** anomalies had not previously been characterized through a local ***,we undertook a regional-residual separation of the gravity anomalies by using the polynomial *** signatures of near-surface small-extent geological structures were *** conduct a quantitative interpretation of the gravity anomalies,one profile was drawn on a residual Bouguer anomaly map and then interpreted by spectral analysis,the ideal body solution,and 2.5-dimensional *** results showed that the intrusive body in the Bagodo area consists of two trapezoidal *** first and second blocks have roofs approximately 7.5 and 14 km deep,respectively,whereas their bases are approximately 17 km *** values are in agreement with those obtained by the ideal body solution,which showed two cells with a density contrast of 0.3 g·cm^(−3) in comparison with the surrounding *** density of this body was estimated to be approximately 3 g·cm^(−3).The topography of these rocks showed that they are basaltic rocks that would have cooled in fracture zones as an intrusion.

关键词： spectral analysis ideal body solution 2.5-dimensional modeling

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The labio-mandibular flap for upper lip and peri-commissural defects

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Plastic and Aesthetic Research 2018年第1期5卷 28-33页

作者： Ruben yap Kannan charles Nduka Department of Plastic Surgery Queen Victoria HospitalEast Grinstead RH193DZUK

Aim: Peri-commisural defect reconstruction using the Abbe or Estlander flaps tend to pilfer tissue from the lower lip, contributing to microstomia, with its attendant problems. In this study, we aim to design a flap for more superficial defects, in which the underlying orbicularis oris muscle can be preserved when resecting peri-commisural skin malignancies whilst also ensuring completeness of excision. Methods: In a retrospective case review of 7 cases at our institution over a 12-month period (2016-2017), we conceptually designed a perforator-plus fascio-cutaneous flap from within the labio-mandibular fold with a 6-month follow-up in terms of oncological clearance and aesthetic outcome. The cohort was composed of patients with skin cancers e.g. basal and squamous cell carcinomas, presenting to a tertiary care facial plastic surgery centre. The technique involved raising a flap from within the peri-oral area, with a scar disguised along the labio-mandibular and naso-labial folds which allows for both an aesthetic reconstruction and the preservation of the oral sphincter mechanism, by avoiding microstomia. The outcomes measured were (1) to ascertain whether this procedure is oncologically safe, (2) there were instances of microstomia and (3) aesthetic appearance. Results: All oncological lesions were completely excised in all cases and at up to six months' follow-up, there were no instances of recurrence. Functionally, oral sphincter function was preserved in all instances as was aesthetic appearance. Conclusion: The labio-mandibular flap is an oncologically safe procedure for skin cancers whilstpreserving oral sphincter function and maintaining aesthetics. It is hence, a superior alternative to Abbe and Estlander flaps, for more superficial defects, not requiring mucosal excision.

关键词： Peri-commisural reconstruction Abbe flap Estlander flap labio-mandibular flap

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Subsurface Structural Mapping Using Combined Terrestrial and Grace Gravity Data of the Adamawa Plateau (North-Cameroon)

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International Journal of Geosciences 2017年第7期8卷 869-887页

作者： Bouba Apollinaire Kamguia Joseph Tabod charles Tabod yap Loudi Nouayou Robert Kande Houetchak Ludovic Oyoa Valentin Department of Physics Higher Teachers’ Training College University of Maroua Maroua Cameroon Department of Physics Faculty of Science University of Yaounde I Yaounde Cameroon National Institute of Cartography Yaounde Cameroon

In order to analyze and determine the geological structures of the Adamawa plateau, the terrestrial gravity data were combined to data computed from GGM02C gravity model. The dense gravity net obtained were further introduced into qualitative and quantitative interpretations. The resulting Bouguer anomaly map obtained from combined data shows NE-SW direction which nearly coincides with the main direction of the fractures affecting the basement in the region and indicates strong gradients marking the presence of discontinuities between heavy and negative gravity anomaly. In order to conduct the quantitative interpretation of the combined gravity data, three profiles were drawn on the residual Bouguer anomaly map and therefore were interpreted using spectral analysis method and 3D density inversion. The knowledge of the depth and density of the geological structures show an uplift of dense rocks under the granite-gneiss substratum. This dense material found in the ENE-WSW direction of the Adamawa Plateau is interpreted as basaltic intrusion probably resulting from tectonic processes. According to this study, the depths of 3.83 km and 9.62 km are the new values of depths obtained for futures investigations in the Adamawa plateau.

关键词： GGM02C Adamawa Plateau Bouguer Anomaly 3D Density Model Spectral Analysis

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Wikicliki: 在智能手机时代下的储存习惯

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当代美术家 2021年第3期 78-81页

作者：叶淑惠沙布尔·侯赛因·穆斯塔法不详

美术馆能否激发讨论,让艺术家探讨收藏的意义?对此,新加坡美术馆从艺术家不断变化的创作和呈现方式中汲取灵感,推出展览“Wikicliki:在智能手机时代下的储存习惯”,以探索如今当代艺术收藏所需的关键策略。“Wikicliki”展出了6位艺术... 详细信息

美术馆能否激发讨论,让艺术家探讨收藏的意义?对此,新加坡美术馆从艺术家不断变化的创作和呈现方式中汲取灵感,推出展览“Wikicliki:在智能手机时代下的储存习惯”,以探索如今当代艺术收藏所需的关键策略。“Wikicliki”展出了6位艺术家的作品,他们通过各自的工作模式为新加坡当代艺术家面临的一系列问题提供了独特的见解。此次展览将呈现6组艺术家与策展员的合作成果——分别为张奕满(Heman Chong)与叶淑惠(Selene yap)、蔡财德(Chua Chye Teck)与郑嘉韵(Cheng Jia Yun)、陈美美(Debbie Ding)与沙布尔·侯赛因·穆斯塔法(Shabbir Hussain Mustafa)、巴尼·海卡尔(Bani Haykal)与Chanon Kenji Praepipatmongkol、王良吟(Amanda Heng)与丁彦惠(Teng Yen Hui)及林育荣(charles Lim Yi Yong)与郑伟汉(Kenneth Tay)。《当代美术家》采访策展人叶淑惠和沙布尔·侯赛因·穆斯塔法,就展览主题和策划等话题展开了讨论。

关键词：收藏数码时代

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