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海岸工程 1998年第2期17卷 74-78页

作者：尹逊福 c.Y.Liaw c.g.koh 国立新加坡大学

用某些简单模式对二类海上建筑物的非线性特性（非线性波力和非线性刚性）进行了分析研究指出，在某些场合中即使如此简单的模式也可以显示其浑沌性；还讨论了噪声对带有双线性刚性模式浑沌响应的作用。

关键词：非线性波力非线性刚度浑沌噪声海上建筑物

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受任意激励矩形液体阻尼器的理论和实验研究

世界地震工程 1994年第4期10卷 66-74,23页

作者： c.g.koh S.Mahatma c.M.Wang 贲凯

一、前言柔性小阻尼结构产生的振动,不仅会使结构内部的人员感到不舒服,而且会导致结构内的设备发生故障,甚至结构本身发生破坏。因此,对设计者来说,要设法将这些(强迫的或自激的)振动抑止在可以接受的范围内,这是十分重要的。在这方面... 详细信息

一、前言柔性小阻尼结构产生的振动,不仅会使结构内部的人员感到不舒服,而且会导致结构内的设备发生故障,甚至结构本身发生破坏。因此,对设计者来说,要设法将这些(强迫的或自激的)振动抑止在可以接受的范围内,这是十分重要的。在这方面,常常采用被动阻尼器。通常采用的一种被动阻尼器是调谐质量阻尼器(TMD),它在结构振动控制方面很有效。本文讨论另一种利用装有部分粘性液体的容器的被动控制系统。

关键词：阻尼器液体阻尼器实验研究

A new strain-based pentagonal membrane finite element for solid mechanics problems

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Theoretical & Applied Mechanics Letters 2024年第3期14卷 211-216页

作者： Wei Hao koh Logah Perumal cheeKuang Kok Faculty of Engineering and Technology Multimedia UniversityMelaka 75450Malaysia

Polygonal finite elements remain an attractive option in finite element analysis due to their flexibility in modelingarbitrary shapes compared to *** this study,a pentagonal membrane element was developed with thestrain approach for the first *** element possesses invariance,and the equilibrium constraint was appliedto the assumed strain field using corrective *** by the advancing front technique,a pentagonalmesh was generated,and the mesh quality was enhanced with Laplacian *** performance of thedeveloped pentagonal element was assessed in a few numerical tests,and the results revealed its suitability inmodeling the bending of ***,the numerical results are enhanced when pentagonal elements are usedin mesh transitions along boundaries to smoothen curved edges and capture distributed loads.

关键词： Strain-based pentagonal element corrective coefficients EquilibriumLaplacian smoothing Pentagonal mesh Mesh transition

Image enhancement with intensity transformation on embedding space

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cAAI Transactions on Intelligence Technology 2024年第1期9卷 101-115页

作者： Hanul Kim Yeji Jeon Yeong Jun koh Department of Applied Artificial Intelligence Seoul National University of Science and TechnologySeoulSouth Korea Department of computer Science and Engineering Chungnam National UniversityDaejeonSouth Korea

In recent times,an image enhancement approach,which learns the global transformation function using deep neural networks,has gained ***,many existing methods based on this approach have a limitation:their transformation functions are too simple to imitate complex colour transformations between low-quality images and manually retouched high-quality *** order to address this limitation,a simple yet effective approach for image enhancement is *** proposed algorithm based on the channel-wise intensity transformation is ***,this transformation is applied to the learnt embedding space instead of specific colour spaces and then return enhanced features to *** this end,the authors define the continuous intensity transformation(cIT)to describe the mapping between input and output intensities on the embedding ***,the enhancement network is developed,which produces multi-scale feature maps from input images,derives the set of transformation functions,and performs the cIT to obtain enhanced *** experiments on the MIT-Adobe 5K dataset demonstrate that the authors’approach improves the performance of conventional intensity transforms on colour space ***,the authors achieved a 3.8%improvement in peak signal-to-noise ratio,a 1.8%improvement in structual similarity index measure,and a 27.5%improvement in learned perceptual image patch ***,the authors’algorithm outperforms state-of-the-art alternatives on three image enhancement datasets:MIT-Adobe 5K,Low-Light,and google HDRþ.

关键词： computer vision deep learning image enhancement image processing

Quantifying droplet–solid friction using an atomic force microscope

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Droplet 2024年第2期3卷 105-112页

作者： Xue Qi koh calvin Thenarianto Ville Jokinen Dan Daniel Institute of Materials Research and Engineering(IMRE) Agency for ScienceTechnology and Research(A*STAR)SingaporeSingapore Department of chemistry and Materials Science School of Chemical EngineeringAalto UniversityEspooFinland Division of Physical Sciences and Engineering King Abdullah University of Science and Technology(KAUST)ThuwalSaudi Arabia

controlling the wetting and spreading of microdroplets is key to technologies such as microfluidics,ink-jet printing,and surface *** angle goniometry is commonly used to characterize surface wetting by droplets,but the technique is ill-suited for high contact angles close to 180°.Here,we attach a micrometric-sized droplet to an atomic force microscope cantilever to directly quantify droplet–solid friction on different surfaces(superhydrophobic and underwater superoleophobic)with sub-nanonewton force *** demonstrate the versatility of our approach by performing friction measurements using different liquids(water and oil droplets)and under different ambient environments(in air and underwater).Finally,we show that underwater superoleophobic surfaces can be qualitatively different from superhydrophobic surfaces:droplet–solid friction is highly sensitive to droplet speeds for the former but not for the latter surface.

关键词： surface. underwater latter

Fault Location Method for Overhead Feeders with Distributed generation Units Based on Direct Load Flow Approach

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Journal of Modern Power Systems and clean Energy 2024年第4期12卷 1135-1146页

作者： charalampos g.Arsoniadis Vassilis c.Nikolaidis Department of Electrical and computer Engineering Democritus University of ThraceXanthi 67100Greece

This paper proposes a novel fault location method for overhead feeders,which is based on the direct load flow *** method is developed in the phase domain to effec-tively deal with unbalanced network conditions,while it can al-so handle any type of distributed generation(Dg)units without requiring equivalent *** utilizing the line series parame-ters and synchronized or unsynchronized voltage and current phasor measurements taken from the sources,the method reli-ably identifies the most probable faulty *** the aid of an index,the exact faulty section among the multiple candi-dates is *** simulation studies for the IEEE 123-bus test feeder demonstrate that the proposed method accu-rately estimates the fault position under numerous short-circuit conditions with varying pre-fault system loading conditions,fault resistances,and measurement *** proposed meth-od is promising for practical applications due to the limited number of required measurement devices as well as the short computation time.

关键词： Fault location distribution system direct load flow distributed generation

critical appraisal of novel prediction models and risk calculators for post-hepatectomy liver failure and complications: practicability and generalisability in the real-world setting

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Hepatobiliary Surgery and Nutrition 2024年第4期13卷 696-698页

作者： Darren Weiquan chua Yun Zhao Ye Xin koh Department of Hepatopancreatobiliary and Transplant Surgery Singapore General Hospital and National Cancer Centre SingaporeSingaporeSingapore Duke-National University of Singapore Medical School SingaporeSingapore Liver Transplant Service SingHealth Duke-National University of Singapore Transplant CentreSingaporeSingapore

Over the last few decades,the evolution of liver resection has progressed through numerous milestones in peri-operative management,operative techniques and novel technologies that have dramatically improved patient safety and outcomes(1).consequently,such developments have enabled surgeons to embark on liver resections of lesions in technically challenging locations,whereby extended resection or bilovascular reconstruction may be required to ensure oncologic *** the context of extended resections or resection of lesions from heavily diseased livers,concerns remain regarding the adequacy of the remnant future liver remnant(FLR)and liver function,placing patients at risk of the clinical phenomenon known as post-hepatectomy liver failure(PHLF).Although relatively uncommon,PHLF has a reported incidence of up to 32%in the literature and remains an important cause of post-hepatectomy morbidity and mortality(2).Presently,several definitions have been proposed to describe PHLF,the most recent of which was proposed by the International Study group of Liver Surgery(ISgLS).In this definition,PHLF was defined as an increased international normalized ratio(INR)or hyperbilirubinemia on or after post-operative day 5,with further stratification of severity grades(A,B or c)based on the extent of clinical management(3).While definitions in PHLF assist in providing a common diagnostic framework among physicians,establishing predictors in PHLF is conceivably more helpful as it allows surgeons to have important decision-making details prior to planned liver resection.

关键词： Hepatectomy post-hepatectomy liver failure(PHLF) predictive model risk calculation

Microstructural evolution in lithium plating process and its effect on the calendar storage life

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Nano Research 2024年第10期17卷 8834-8841页

作者： Ki Hwan koh Dong Ju Lee Anthony Mu Kangwoon Kim Taehee Kim Zheng chen Department of chemical and Nano Engineering University of California San DiegoLa JollaCA 92093USA Program of Materials Science and Engineering University of California San DiegoLa JollaCA 92093USA Sustainable Power and Energy center University of California San DiegoLa JollaCA 92093USA

The growing demand for electric vehicles highlights the need for energy storage solutions with higher densities,spotlighting Li metal anodes as potential successors to traditional Li-ion batteries(LIBs).Achieving longer calendar aging life for Li metal anodes is crucial for their practical use,given their propensity for corrosion due to a low redox potential,which leads to compromised cycling stability and significant capacity loss during *** research investigated that this susceptibility is mainly dependent on the surface area of Li metal anode and the properties of the solid electrolyte interphase(SEI),particularly its stability and growth *** research adds to this understanding by demonstrating that the amount of Li plating is a key factor in its corrosion during open-circuit storage,as assessed across various *** discovered that increasing the Li plating amount effectively reduces coulombic efficiency(c.E.)loss during aging,due to a lower surface area-to-Li *** implies that the choice of electrolyte for optimal storage life should consider the amount of Li plating,with higher capacities promoting better storage characteristics.

关键词： lithium metal batteries anode-free batteries calendar life of batteries lithium anode corrosion

Death from caustic ingestion:A case report

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Journal of Acute Disease 2024年第2期13卷 81-84页

作者： Shao Hui koh Jacqueline c.L.Tan Department of Emergency Medicine Sengkang General HospitalSingapore

Rationale:Acute caustic ingestion from suicidal intent is not usual in emergency departments in developed *** of the substances commonly ingested by suicidal patients,phosphoric acid,tends to cause multi-system ***’s concern:A 41-year-old male patient presented with complaints of throat discomfort,severe generalized abdominal pain,and multiple episodes of hematemesis after ingesting a restroom cleaning ***:Poisoning by acute caustic ingestion(containingc acid andglycol).Interventions:The patient was administered 50 mL of 8.4%sodium bicarbonate solution followed by an isotonic sodium bicarbonate solution running at 500 mL/h,a hyperkalemia kit,ceftriaxone,metronidazole,omeprazole,and *** patient then underwent urgent ***:The patient suffered gastrointestinal bleeding as a result of local caustic *** addition,his course of illness was complicated by severe acidemia from high anion gap metabolic acidosis and deranged electrolytes(hyperphosphatemia,hyperkalemia,and hypocalcemia).He developed multi-organ failure and eventually ***:The clinician needs to be mindful of the multi-system complications arising from such a caustic *** patients need to be monitored closely for deterioration,and have prompt management of the various arising complications,to reduce the high morbidity and mortality associated with this condition.

关键词： Phosphoric acid poisoning caustic ingestion Acid ingestion cleaner ingestion corrosive ingestion

Immediate secondary rhinoplasty using a folded dermofat graft for resolving complications related to silicone implants: A case report

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World Journal of clinical cases 2024年第14期12卷 2426-2430页

作者： Hoon Kim Jong Hyup Kim In chang koh Soo Yeon Lim Department of Plastic and Reconstructive Surgery Konyang University HospitalUniversity of Konyang College of MedicineMyunggok Medical Research InstituteDaejeon 35365South Korea

BAcKgROUND Various surgical techniques have been developed to enhance the nose shapes of Asian *** implant augmentation rhinoplasty is widely used because it is relatively easy to perform and often yields satisfactory ***,this technique may lead to complications,including ischemia,necrosis,and *** most appropriate management of these complications,including infection,is immediate implant removal and revision surgery once the accompanying inflammation has ***,the patient may experience distress from nasal deformities during the intervention *** SUMMARY Herein,we describe the case of a patient who underwent a secondary dorsal augmentation,with a folded dermofat graft harvested from the inguinal area and simultaneous implant removal,successfully preventing dimpling of the nasal *** This surgical method can effectively manage implant-related complications following augmentation rhinoplasty using a silicone implant and provide satis-factory patient outcomes.

关键词： complications Nose deformities Acquired Rhinoplasty Dermofat Surgery Plastic case report