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Synthesis of zinc oxide nanocrystals by thermal decomposition of Zn-oleate in organic medium

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Science China(Technological Sciences) 2008年第12期51卷 2075-2079页

作者： Beng S.ong Rafik O.LOUTFY Materials Design & Integration Laboratory Xerox Research Centre of Canada Department of Chemical Engineering McMaster UniversityOntario L8S 4L7

We report the synthesis of uniform-sized hexagonal ZnO nanocrystals by the thermolysis of Zn-oleate complex,which was prepared from the reaction of inexpensive and environmentally friendly reagents such as zinc nitrate and sodium *** organic compounds with different boiling points,octadecene and octylether,were selected as the medium for thermolysis of Zn-oleate *** optimized reaction conditions,we were able to synthesize ZnO nanoparticles with the size being about 10 nm.X-ray diffraction and transmission electron micrograph(TEM) images confirmed the high crystallinity of the nanocrystals.

关键词： zinc oxide nanocrystal transmission electron micrograph thermal decomposition

Intermediate Energy Pion-^(20)Ne Elastic Scattering in the α+^(16)O Model of (20)~Ne

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Communications in Theoretical Physics 2013年第11期60卷 588-592页

作者：杨永栩 ong Piet-Tjing 李清润 Department of Physics Guangxi Normal University Institute of High Energy Physics Chinese Academy of Sciences

We present an analysis of π-^20Ne elastic scattering at intermediate energy basing on the α＋^16O model of the ^20Ne nucleus and in the framework of Glauber multiple scattering theory. Satisfactory agreement with the general features of the experimental data of pion elastic scattering on the neighboring 4N-type nuclei is obtained without any free parameters. Compared with the experimental angular distributions of pion elastic scattering on ^12 C, ^16O, ^24Mg, and ^28Si nuclei, the diffractive patterns and the positions of the dips and peaks in the angular distributions of ^π-^20Ne elastic scattering are reasonably predicted by the calculations.

关键词： pion-nucleus elastic scattering nuclear cluster model

Notch-δ-doped InP Gunn diodes for low-THz band applications

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Journal of Electronic Science and Technology 2023年第2期21卷 30-43页

作者： Duu Sheng ong Siti Amiera Mohd Akhbar Kan Yeep Choo Faculty of Engineering Multimedia UniversityCyberjaya63100Malaysia

The viability of the indium phosphide(InP)Gunn diode as a source for low-THz band applications is analyzed based on a notch-δ-doped structure using the Monte Carlo *** presence of theδ-doped layer could enhance the current harmonic amplitude(A0)and the fundamental operating frequency(f0)of the InP Gunn diode beyond 300 GHz as compared with the conventional notch-doped structure for a 600-nm length *** its superior electron transport properties,the notch-δ-doped InP Gunn diodes outperform the corresponding gallium arsenide(GaAs)diodes with up to 1.35 times higher in f0 and 2.4 times larger in A0 under DC *** optimized InP notch-δ-doped structure is estimated to be capable of generating 0.32-W radio-frequency(RF)power at 361 *** Monte Carlo simulations predict a reduction of 44%in RF power,when the device temperature is increased from 300 K to 500 K;however,its operating frequency lies at 280 GHz which is within the low-THz *** shows that the notch-δ-doped InP Gunn diode is a highly promising signal source for low-THz sensors,which are in a high demand in the autonomous vehicle industry.

关键词： Gunn diode δ-doped Monte Carlo Indium phosphide(InP) Terahertz source

Comparing a non-invasive hemodynamic monitor with minimally invasive monitoring during major open abdominal surgery

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The Journal of Biomedical Research 2014年第4期28卷 320-325页

作者： Lawrence ong Hong Liu Cedars-Sinai Medical Center Department of AnesthesiologyLos AngelesCA 90048USA University of California DavisDepartment of Anesthesiology and Pain MedicineSacramentoCA 95817USA

As part of the enhanced recovery after surgery （ERAS） protocol, the goal-directed fluid management with hemodynamic monitoring can effectively guide perioperative fluid use and significantly improve the outcomes in highrisk patients undergoing major surgeries. Several minimally invasive and non-invasive monitoring devices are commercially available for clinical use. As part of an internal evaluation, we reported the results from three different hemodynamic monitoring devices used in a patient undergoing a major abdominal surgery.

关键词： enhanced recovery after surgery non-invasive hemodynamic monitoring goal directed therapy

Noise robustness of an operational modal-based structural damage-detection scheme using impact-synchronous modal analysis

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浙江大学学报(英文版)A辑:应用物理与工程 2023年第9期24卷 782-800页

作者： Pei Yi SIOW Zhi Chao ong Shin Yee KHOO Kok-Sing LIM Department of Mechanical Engineering Faculty of EngineeringUniversiti MalayaKuala Lumpur 50603Malaysia Photonics Research Centre Deputy Vice Chancellor(Research and Innovation)OfficeUniversiti MalayaKuala Lumpur 50603Malaysia

Data-driven damage-detection schemes are usually unsupervised machine-learning models in practice,as these do not require any ***-based features are commonly used in these schemes but often require several other parameters to accurately correlate with damage,as they may not globally represent the model,making them less sensitive to *** data,such as frequency response functions(FRFs)and principal component analysis(PCA)reduced FRFs(PCA-FRFs),inherits the dynamic characteristics of the structure,and it changes when damage occurs,thus showing sensitivity to ***,noise from the environment or external sources such as wind,operating machines,or the in-service system itself,can reduce the modal data's sensitivity to damage if not handled properly,which affects damage-detection *** study proposes a noise-robust operational modal-based structural damage-detection scheme that uses impact-synchronous modal analysis(ISMA)to generate clean,static-like FRFs for damage *** allows modal data collection without requiring shutdown conditions,and its denoising feature aids in generating clean,static-like FRFs for damage *** results showed that the FRFs obtained through ISMA under noise conditions have frequency response assurance criterion(FRAC)and cross signature assurance criterion(CSAC)scores greater than 0.9 when compared with FRFs obtained through experimental modal analysis(EMA)under static conditions;this validates the denoising feature of *** the denoised FRFs are reduced to PCA-FRFs and used in an unsupervised learning-based damage-detection scheme,zero false alarms occur.

关键词： Impact-synchronous modal analysis(ISMA) Frequency response function(FRF) Principal component analysis(PCA) Unsupervised learning Damage detection

两种气相色谱质谱联用技术在人体尿液代谢组学研究中的应用对比

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环境与健康杂志 2015年第4期32卷 342-346,377页

作者：王晶杨杏芬 ong choon nam 高亮高燕红梁旭霞许瑛华汤柳英陈文才广东省疾病预防控制中心广东广州511430 中山大学公共卫生学院新加坡国立大学公共卫生学院暨南大学医学院预防医学系

目的对比研究气相色谱-四极杆飞行时间串联质谱(GC/QTOF-MS)法与气相色谱-四极杆质谱(GC/Q-MS)法在人体尿液代谢组学研究中的应用。方法将采集到的94份环境镉暴露人群与对照人群尿液样品采用相同的前处理,通过两种气质联用技术采集质谱... 详细信息

目的对比研究气相色谱-四极杆飞行时间串联质谱(GC/QTOF-MS)法与气相色谱-四极杆质谱(GC/Q-MS)法在人体尿液代谢组学研究中的应用。方法将采集到的94份环境镉暴露人群与对照人群尿液样品采用相同的前处理,通过两种气质联用技术采集质谱数据,比较两组人群尿液代谢组谱图差异,并利用质谱数据建立模式识别模型,考察建模效果。结果 GC/QTOF-MS技术采集到的尿液代谢组信息较GC/Q-MS技术更为丰富、全面;基于GC/QTOF-MS的数据建立的偏最小二乘模型(R2Y=0.757,Q2=0.5)效果不及基于GC/Q-MS的数据建立的模型(R2Y=0.875,Q2=0.558)。结论 GC/QTOF-MS法具有超高的分辨率与质量准确度,决定该技术在代谢组学研究中的代谢产物识别与结构鉴定方面有着传统GC/Q-MS法无法比拟的优势;但该技术由于较传统GC/Q-MS技术能够采集更多的碎片离子,而显著加强了碎片子离子之间存在的共线性关系,导致模式识别建模效果有所下降,但在代谢组学研究中仍然充满应用前景。

关键词：代谢组学气相色谱-质谱气相色谱-四级杆飞行时间质谱人体尿液

Improving maintenance efficiency and safety through a human-centric approach

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Advances in Manufacturing 2021年第1期9卷 104-114页

作者： C.Y.Siew S.K.ong A.Y.C.Nee Graduate School for Integrative Sciences and Engineering National University of Singapore28 Medical DriveSingapore 117456Singapore Department of Mechanical Engineering National University of Singapore9 Engineering Drive 1Singapore 117576Singapore

This paper presents an adaptive human-machine interface(HMI)that can provide appropriate sets of digital maintenanceinformation and guidance to an operator during *** takes into consideration the expertise level of the operator and the maintenance context and *** proposed human-centric methodology considers the heart rate,intention,and expertise level of the operator,which can be captured using sensors during maintenance.A set of rules is formulated based on the sensor data to infer the state of the operator during a maintenance *** on the operator state,the adaptive HMI can augment the operator's senses using a scheme that combines visual,audio,and haptic guidance cues during maintenance to enhance the operator's ability to perceive information and perform maintenance *** schemes of visual,audio,and haptic cues are developed based on a comparison of the best practices obtained from experienced operators.

关键词： Augmented reality(AR) Ergonomics Product development Maintenance

不同类型橡胶园间作对竹芋生产力、经济效益和净温室气体排放的影响

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西南农业学报 2024年第6期37卷 1239-1246页

作者：黄坚雄魏元姁董天站潘剑王秀全中国热带农业科学院橡胶研究所海口570102 省部共建国家重点实验室培育基地-海南省热带作物栽培生理学重点实验室海口571101 农业农村部儋州热带作物科学观测试验站海南詹州571737 中国农业大学三亚研究院海南三亚572025

【目的】构建和发展橡胶农林复合模式提高综合产出和生态效益,为保障海南省天然橡胶种植业可持续发展提供参考。【方法】以淀粉作物竹芋(Maranta arundinacea L.)为对象,在幼龄常规胶园(6龄)、幼龄(6龄)和成龄(20龄)的全周期胶园中进行... 详细信息

【目的】构建和发展橡胶农林复合模式提高综合产出和生态效益,为保障海南省天然橡胶种植业可持续发展提供参考。【方法】以淀粉作物竹芋(Maranta arundinacea L.)为对象,在幼龄常规胶园(6龄)、幼龄(6龄)和成龄(20龄)的全周期胶园中进行间作,从光照、土壤养分、生产力、经济效益和温室气体排放方面,综合分析竹芋在不同类型胶园中的适宜性。【结果】幼龄常规胶园间作的光照条件最差,间作竹芋产量仅4750 kg/hm^(2),而幼龄和成龄全周期胶园中间作区域的光照条件较好,产量分别为27470和11190 kg/hm^(2),不同处理之间存在显著差异(P<0.05)。不同间作处理竹芋的生物量亦呈相同趋势。不同处理竹芋的营养成分(淀粉、粗蛋白和可溶性糖)总体上无显著变化。幼龄和成龄全周期胶园间作竹芋的经济效益分别为86185和9285元/hm^(2),而在幼龄常规胶园中间作则为-21415元/hm^(2)。从净温室气体排放方面看,仅幼龄全周期胶园间作竹芋处理为温室气体的汇(368 kg/hm^(2)),而其他两种处理则为温室气体的源。【结论】幼龄的全周期胶园间作竹芋具有最佳的生产力和经济效益,同时能兼顾一定的生态效益,是海南省适宜的橡胶农林复合模式。

关键词：橡胶农林复合模式竹芋生产力经济和生态效益

Biomarkers in Barrett's esophagus and esophageal adenocarcinoma:Predictors of progression and prognosis

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World Journal of Gastroenterology 2010年第45期16卷 5669-5681页

作者： Chin-Ann J ong Pierre Lao-Sirieix Rebecca C Fitzgerald MRC Cancer Cell Unit Hutchison-MRC Research CentreCambridgeCB20XZUnited Kingdom

Barrett’s esophagus is a well-known premalignant lesion of the lower esophagus that is characterized by intestinal metaplasia of the squamous epithelium. It is clinically important due to the increased risk (0.5% per annum) of progression to esophageal adenocarcinoma (EA), which has a poor outcome unless diagnosed early. The current clinical management of Barrett’s esophagus is hampered by the lack of accurate predictors of progression. In addition, when patients develop EA, the current staging modalities are limited in stratifying patients into different prognostic groups in order to guide the optimal therapy for an individual patient. Biomarkers have the potential to improve radically the clinical management of patients with Barrett’s esophagus and EA but have not yet entered mainstream clinical practice. This is in contrast to other cancers like breast and prostate for which biomarkers are utilized routinely to inform clinical decisions. This review aims to highlight the most promising predictive and prognostic biomarkers in Barrett’s esophagus and EA and to discuss what is required to move the field forward towards clinical application.

关键词： Barrett’s esophagus Esophageal adenocar cinoma Esophageal dysplasia Prognosis