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A minimalist approach for detecting sensor abnormality in oil and gas platforms

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Petroleum Research 2022年第2期7卷 177-185页

作者： Pauline wong w.k.wong Filbert H.Juwono Lenin Gopal Mohd Amaluddin Yusoff Curtin Malaysia Digital Innovation(CMDI) Curtin University Malaysia98009MiriSarawakMalaysia Department of Electrical and Computer Engineering Curtin University Malaysia98009MiriSarawakMalaysia

Compressors play an important role in day-to-day operation in most oil and gas platforms,especially in the case for maintaining gas pressure in transportation *** complex problem to detect the sensors health and abnormality as the sensor reading would reflect the various states of the *** ideal situation,sensor readings offer vast amounts of information on compressor health and could possibly indicate early fault of ***,due to harsh site and process operating conditions,sensors are often found to have drifted or failed,and there is no standard methodology to predict abnormality apart from applying emerging industrial smart sensor *** this paper,we investigate a minimalist approach for detecting abnormality of compressor's shaft's RPM *** the sensors in the compressor are correlated,we first use the outputs of other sensors to predict the shaft's RPM using regression-based models(neural networks and multiple linear regression).Second,we calculate the histogram of residuals by taking the difference between the predicted sensor value and the actual sensor value plus the abnormality in terms of bias/miscalibration and *** histogram of residuals can be used for sensor abnormality *** general,sensor states can be monitored by observing the shifting of the mean in the histogram of *** sensor readings contaminated with noise can be seen by a shifted mean whose value is between the normal condition mean and the biased condition *** method is compact and would be relevant to monitor irregularity of the sensors.

关键词： Sensor fault detection Multistage turbine air compressor Multiple linear regression Neural network Oil and gas industry

Machine learning for weed–plant discrimination in agriculture 5.0:An in-depth review

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Artificial Intelligence in Agriculture 2023年第4期10卷 13-25页

作者： Filbert H.Juwono w.k.wong Seema Verma Neha Shekhawat Basil Andy Lease Catur Apriono Department of Electrical and Electronic Engineering Xi'an Jiaotong-Liverpool UniversitySuzhou 215123China Dpartment of Electrical and Computer Engineering Curtin University MalaysiaMiri 98009Malaysia School of Physical Sciences Banasthali VidyapithRajasthan 304022India Department of Electrical Engineering Universitas IndonesiaDepok 16424Indonesia

Agriculture 5.0 is an emerging concept where sensors,big data,Internet-of-Things(IoT),robots,and Artificial In-telligence(AI)are used for agricultural *** from Agriculture 4.0,robots and AI become the focus of the implementation in Agriculture *** of the applications of Agriculture 5.0 is weed management where robots are used to discriminate weeds from the crops or plants so that proper action can be performed to remove the *** paper discusses an in-depth review of Machine Learning(ML)techniques used for discriminating weeds from crops or *** specifically present a detailed explanation of five steps required in using ML algorithms to distinguish between weeds and plants.

关键词： Agriculture 5.0 Machine learning Unmanned aerial vehicle weed-plant discrimination

Antimicrobial Activity of Traditional Chinese Medicines on Common Oral Bacteria

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Chinese Medicine 2011年第2期2卷 37-42页

作者： Michelle k.Z.Yuen Ricky w.k.wong Urban Hagg Lakshman Samaranayake Orthodontics Faculty of DentistryThe University of Hong KongHong KongChina Oral Biosciences Faculty of DentistryThe University of Hong KongHong KongChina

Objective: To evaluate twenty Traditional Chinese Medicines (TCM) against four oral bacteria. Methods: Twenty TCM were tested for sensitivity against Streptococcus mitis, Streptococcus sanguis, Streptococcus mutans and Porphyromonas gingivalis. Aliquots of suspension of each bacterial species were inoculated on a horse blood agar (HBA) plate, 6 mm diameter paper disks was soaked in different drug suspensions were placed concentrically on a HBA plate. Disks soaked in 0.2% w/v chlorhexidine were used as positive controls. These HBA plates were incubated for 48 hours anaerobically and the diameters of growth inhibition of three different areas were measured using a calibrated computer software and the mean diameter obtained for each bacteria. Broth microdilution assay was used to determine minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC). The experiment was repeated on three separate occasions. Results: The TCMs that consistently against Porphyromonas gingivalis, included Folium artemisiae argyi, Fructus crataegi, Rhizoma dryopteris crassirhizomae, Flos magnoliae, Rhizoma polygoni cuspidati, Radix scrophulariae ningpoensis, Galla chinensis, Radix scutellariae baicalensis and Rhizoma coptidis;against Streptococcus mutans included Fructus crataegi, Galla chinensis and Rhizoma copitidis;against Streptococcus mitis and Streptococcus sanguis included Galla chinensis and Rhizoma copitidis. Conclusion: Rhizoma copitidis and Galla chinensis had inhibitory effects on Streptococcus mitis, Streptococcus sanguis, Streptococcus mutans and Porphyromonas gingivalis in vitro.

关键词： Chinese Medicine Antimicrobial Activity Streptococcus Mutans Streptococcus Sanguis Streptococcus Mitis Porphyromonas Gingivalis Oral Biofilm

边缘骨性Ⅲ类错手术与非手术效果的对比分析

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口腔医学研究 2009年第5期25卷 611-614页

作者：辜岷 A-Bakr M.Rabie Ricky w.k.wong 深圳市第二人民医院口腔科广东深圳518035 香港大学牙学院正畸科

目的:比较边缘骨性Ⅲ类错正颌手术与正畸掩饰治疗(拔牙)后的效果差异。方法:对两组骨性Ⅲ类手术边缘病例治疗前后的X线头颅侧位片进行对比分析,其中手术治疗组12例,单纯正畸组13例,所有病例治疗前ANB角都>-5°。结果:手术组治疗的主... 详细信息

目的:比较边缘骨性Ⅲ类错正颌手术与正畸掩饰治疗(拔牙)后的效果差异。方法:对两组骨性Ⅲ类手术边缘病例治疗前后的X线头颅侧位片进行对比分析,其中手术治疗组12例,单纯正畸组13例,所有病例治疗前ANB角都>-5°。结果:手术组治疗的主要变化是下颌骨前齿槽区的后移及下切牙的直立,正畸组的主要变化是下切牙的后倾及后移。两组治疗后的X线头影测量值经Mann-whitney U检验显示ANB角,上下颌骨长度比(M/M ratio),NAPog角,下切牙倾斜角(∠L1/ML),上下切牙交角(∠U1/L1)有显著性差异,而标志软组织凹陷度的Holdaway角和Z角没有差异。结论:对于骨性Ⅲ类手术边缘错而言,选择合适的病例,手术与正畸掩饰治疗都可以获得可接受的咬合和美观效果。

关键词：骨性Ⅲ类错[牙合]手术边缘

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医药瓶塞和密封件用HIIR（英文）

医药瓶塞和密封件用HIIR（英文）

2004年国际橡胶会议

作者： w.k.wong 埃克森化学欧洲公司

埃克森公司的HUR在全世界广泛用于医药瓶塞和密封件。埃克森HIIR因有的高度不透气、不透水性、化学惰性和纯净性（助剂和杂质含量低）使其成为医药瓶塞和密封件等用途的必然选择。医药瓶塞和密封件目前用途非常广泛,其中包括注射药水瓶...

埃克森公司的HUR在全世界广泛用于医药瓶塞和密封件。埃克森HIIR因有的高度不透气、不透水性、化学惰性和纯净性（助剂和杂质含量低）使其成为医药瓶塞和密封件等用途的必然选择。医药瓶塞和密封件目前用途非常广泛,其中包括注射药水瓶、输液瓶、预充液注射器、医疗设备、冻干制品容器、血液和生物样品采集管等。药品开发（例如新一代抗菌素）和人体健康标准的进步导致对药品储存过程中与之接触的包装材料的纯净度要求越来越高。在药品生产厂批准使用任何瓶塞时,该产品都必须根据包装药品的不同,通过一系列的严格试验。由于CIIR和BUR可以用低用量的、“清洁”硫化剂硫化,使用BIIR制造的瓶塞将获得高度商业成功。但是,新一代抗菌素以及工业标准（例如在中国）要求瓶塞制造公司执行更高的纯净标准。本文将介绍一些进一步改善使用埃克森HIIR制造的医药瓶塞“药品相容性”的最新研究成果,以帮助中国用户满足非常严格的“药品浊度”标准要求。本文还将讨论药品浊度的产生机理和影响因素。通过对先锋5号抗菌素用各种瓶塞进行的实际药品浊度研究,重点阐明所用聚合物品种和硫化剂对获得良好药品相容性的重要性。

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呼出气体中的一氧化氮检测与哮喘

中华儿科杂志 2005年第6期43卷 421-422页

作者：马煜刘传合黄永坚首都儿科研究所哮喘中心北京100020 香港中文大学儿科学系

哮喘的病理基础是慢性气道炎症。支气管镜下支气管灌洗液和支气管内膜活检的方法是检测评估气道炎症的金标准，因其有创伤性和较高的花费使其很难成为哮喘儿童常用的检查方法。其他无创伤性的方法如外周血嗜酸细胞计数、尿白三烯E4(leuk... 详细信息

哮喘的病理基础是慢性气道炎症。支气管镜下支气管灌洗液和支气管内膜活检的方法是检测评估气道炎症的金标准，因其有创伤性和较高的花费使其很难成为哮喘儿童常用的检查方法。其他无创伤性的方法如外周血嗜酸细胞计数、尿白三烯E4(leukotnene-E4)的检测、痰诱导细胞分析等也被用来评价气道炎症的程度，但这些方法缺乏敏感性和特异性，操作费时费力。

关键词：一氧化氮检测哮喘呼出气体支气管内膜活检慢性气道炎症支气管灌洗液嗜酸细胞计数病理基础无创伤性细胞分析金标准外周血白三烯痰诱导特异性敏感性

骨性Ⅲ类错手术与非手术治疗边缘病例的颅面特征分析

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广东牙病防治 2009年第12期17卷 571-573页

作者：辜岷 A.Bakr M.Rabie Ricky w.k.wong 深圳市第二人民医院口腔科广东深圳518035 香港大学牙学院正畸科

目的探讨骨性Ⅲ类错手术与非手术边缘病例的颅面特征,为选择临床治疗方法提供参考。方法选择完成治疗的骨性Ⅲ类错边缘病例,单纯正畸组13例,手术治疗组12例,统计分析2组病例治疗前的X线头影测量值。结果Mann-whitneyu检验显示2组下... 详细信息

目的探讨骨性Ⅲ类错手术与非手术边缘病例的颅面特征,为选择临床治疗方法提供参考。方法选择完成治疗的骨性Ⅲ类错边缘病例,单纯正畸组13例,手术治疗组12例,统计分析2组病例治疗前的X线头影测量值。结果Mann-whitneyu检验显示2组下颌骨前颅底长度比Go-Me/S-N(P=0.026)、上下颌切牙的交角U1-L1(P=0.030)、Holdaway角(P=0.026)的差异有统计学意义,逐步判别分析后仅有Holdaway角能对2组进行预测区分,区分值为12°,总判别准确率为72%。结论制定骨性Ⅲ类错边缘病例治疗计划时,下颌骨前颅底长度比、上下颌切牙的交角以及软组织的凹陷度是要重点分析的颅面结构项目,小于12°的Holdaway角可以作为需手术改善软组织侧貌的初步判定指标。

关键词：骨性Ⅲ类错[牙合] 手术 X线头影测量颅面特征

The electroweak monopole–antimonopole pair in the standard model

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Communications in Theoretical Physics 2024年第3期76卷 113-119页

作者： Dan Zhu khai-Ming wong Guo-Quan wong School of Physics Universiti Sains Malaysia11800 USMPenangMalaysia

we present the first numerical solution that corresponds to a pair of Cho–Maison monopoles and antimonopoles(MAPs) in the SU(2) × U(1) weinberg–Salam(wS) *** monopoles are finitely separated,while each pole carries a magnetic charge ±4π/*** positive pole is situated in the upper hemisphere,whereas the negative pole is in the lower *** Cho–Maison MAP is investigated for a range of weinberg angles,0.4675≤ tan θ_(w)≤10,and Higgs self-coupling,0 ≤ β ≤ *** magnetic dipole moment(μm) and pole separation(d_(z)) of the numerical solutions are calculated and *** total energy of the system,however,is infinite due to point singularities at the locations of monopoles.

关键词： magnetic monopole Cho-Maison monopole weinberg-Salam model

Synthetic brochosomes:Design,synthesis,and applications

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Nano Research 2024年第2期17卷 734-742页

作者： Lin wang Jinsol Choi Tak-Sing wong Department of Mechanical Engineering The Pennsylvania State UniversityUniversity ParkPA 16802USA Materials Research Institute The Pennsylvania State UniversityUniversity ParkPA 16802USA Department of Biomedical Engineering The Pennsylvania State UniversityUniversity ParkPA 16802USA

Brochosomes,which are nanoscopic buckyball-shaped granules produced by leafhoppers,are one of the most intricate structures discovered in *** functions of brochosomes have been proposed but only a few have been experimentally validated due to the challenge of fabricating their synthetic *** in micro-and nanofabrication have recently led to the emergence of synthetic brochosomes,opening up new possibilities for innovative *** review explores the early discovery of natural brochosomes and their geometrical features,followed by the recent progress in fabricating synthetic brochosomes and their *** on future applications and challenges in the scalable manufacturing of synthetic brochosomes are discussed.

关键词： synthetic brochosomes leafhopper antireflection superhydrophobicity surface-enhanced Raman scattering photocatalyst energy harvesting