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Needle knife fstulotomy in flat and diverticular papillae:Is it time for redemption?

Hepatobiliary & Pancreatic Diseases International 2022年第2期21卷 175-181页

作者： João Fernandes Jorge Canena Marta Moreira Gonçalo Alexandrino Luísa Figueiredo Tarcísio Araújo Luís Lourenço David Horta Luís Lopes Department of Gastroenterology Santa Luzia Hospital-Unidade Local de Saúde Alto MinhoViana do CasteloPortugal Department of Gastroenterology Professor Doutor Fernando Fonseca HospitalAmadoraPortugal Department of Gastroenterology Nova Medical School/Faculty of Medical SciencesLisbonPortugal University Center of Gastrenterology-Hospital Cuf Tejo LisbonPortugal Life and Health Sciences Research Institute(ICVS) School of MedicineUniversity of MinhoBragaPortugal ICVS/3B’s-PT Government Associate Laboratory Braga/GuimarãesPortugal

Background: European Society of Gastrointestinal Endoscopy( ESGE) recommends needle-knife fstulotomy(NKF) as the preferred precut technique in cases when standard cannulation techniques fail. Despite scarce scientifc evidence, flat and diverticular papillae are thought not to be ideal for NKF, as they are associated with poor outcomes. The present study aimed to determine the outcomes of the use of NKF in relation to flat and intradiverticular papillae. Methods: This prospective multicenter study enrolled consecutive patients, evidencing na?ve flat(group A, n = 49) or diverticular papilla(group B, n = 28), who underwent NKF after failure of standard cannulation techniques. Diverticular morphology was subdivided into intradiverticular(group B1, n = 14) and diverticular border papillae(group B2, n = 14), using a previously validated endoscopic classifcation of the major papilla. The success of biliary cannulation at initial endoscopic retrograde cholangiopancreatography(ERCP), overall biliary cannulation, overall cannulation time, and the rate of adverse events were assessed in the study. Results: The initial cannulation rates were 93.9%, 64.3% and 71.4% for group A, B1, and B2, respectively( P = 0.005);overall cannulation rates after a second ERCP were 98.0%, 92.9% and 85.7%, respectively( P = 0.134). Adverse events occurred in 11.7% of patients, with post-ERCP pancreatitis(PEP) being the most common adverse event(10.4%). Although there was a trend towards a higher incidence of PEP in flat papillae, univariate and multivariate analyses did not show any signifcant relationship between pancreatitis and trainee involvement, papillary morphology, nor overall cannulation time. Conclusions: Although flat papillae are associated with high success rates of biliary cannulation using NKF, the rate of PEP is not negligible. NKF is feasible in diverticular papillae, but it is associated with a modest success rate in the initial ERCP.

关键词： Endoscopic retrograde cholangiopancreatography Needle-knife fstulotomy Small papilla Diverticular papilla Complications

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具有蜂窝薄片状高比表面积氢氧化镁的制备

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盐科学与化工 2024年第4期53卷 30-34页

作者：郭彦彦赵飒唐山三友新材料股份有限公司河北唐山063600 生特瑞(河北)工程设计有限公司河北石家庄050000

文章以普通氢氧化镁为原料,采用溶剂热法,考察了水溶剂和非水溶剂对氢氧化镁热处理结果的影响。采用扫描电子显微镜(SEM)、X射线衍射仪(XRD)和低温氮气吸附比表面积测定仪对氢氧化镁的形貌和晶体结构进行了表征。结果表明,以15 mL正丁... 详细信息

文章以普通氢氧化镁为原料,采用溶剂热法,考察了水溶剂和非水溶剂对氢氧化镁热处理结果的影响。采用扫描电子显微镜(SEM)、X射线衍射仪(XRD)和低温氮气吸附比表面积测定仪对氢氧化镁的形貌和晶体结构进行了表征。结果表明,以15 mL正丁醇为溶剂,4 g氢氧化钠为矿化剂,加1 g氢氧化镁干粉,在150℃下维持5 h,制备出了蜂窝状有序排列的薄片氢氧化镁,比表面积高达108.13 m^(2)/g。以正丙醇和异丙醇为溶剂也可得到同样的氢氧化镁产品,所得产品比表面积分别为140.65 m^(2)/g和139.04 m^(2)/g。

关键词：氢氧化镁高比表面积正丁醇

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面向大数据的分布式存储与访问优化框架

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通信电源技术 2024年第7期41卷 225-227页

作者：马洒尹孟洋南阳科技职业学院河南南阳474150

文章针对大数据时代的存储与访问挑战,提出一种面向大数据的分布式存储与访问优化框架。提出总体框架设计,明确了分布式存储与访问系统的整体架构和功能模块。针对数据存储问题,研究了数据压缩和存储技术的优化方法,以提高存储效率和数... 详细信息

文章针对大数据时代的存储与访问挑战,提出一种面向大数据的分布式存储与访问优化框架。提出总体框架设计,明确了分布式存储与访问系统的整体架构和功能模块。针对数据存储问题,研究了数据压缩和存储技术的优化方法,以提高存储效率和数据可靠性。针对分布式访问问题,研究了基于负载均衡的数据访问优化方法,以提高系统的整体性能和吞吐量。通过分析和讨论,探讨了方法的特点和改进空间,为分布式存储与访问技术的进一步研究提供了参考。

关键词：大数据分布式存储小波变换负载均衡

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贵州苦苣苔科植物新种资料(8)

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贵州科学 2024年第1期42卷 17-21页

作者：李飒汤升虎贵州省植物园贵州贵阳550000

贵州地处中国西南,苦苣苔科植物物种丰富,近年来有若干个新种在贵州被发现,并被合格发表。为了让研究人员、学生更好地理解贵州植物区系,现逐步将这些新类群进行介绍。本篇收录了德江石蝴蝶Petrocosmea dejiangensis Sheng ***&Jian Xu... 详细信息

贵州地处中国西南,苦苣苔科植物物种丰富,近年来有若干个新种在贵州被发现,并被合格发表。为了让研究人员、学生更好地理解贵州植物区系,现逐步将这些新类群进行介绍。本篇收录了德江石蝴蝶Petrocosmea dejiangensis Sheng ***&Jian Xu、盘州石蝴蝶Petrocosmea panzhouensis Sheng ***&***、开阳半蒴苣苔Hemiboea kaiyangensis ***&***以及黔渝马铃苣苔oreocharis qianyuensis Lei Cai,***&***。

关键词：新分类群石蝴蝶属半蒴苣苔属马铃苣苔属贵州植物区系

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新工科背景下校地合作模式的探索与实践——以风景园林设计课程为例

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创新创业理论研究与实践 2024年第12期7卷 147-150页

作者：陈飒张淑英辽宁工业大学文化传媒与艺术设计学院辽宁锦州121001

地方工科高校在新工科背景下为了更好地适应当前的教育形势,服务区域经济社会发展,进行了风景园林设计课程改革。该文对其校地合作模式进行了实践探索,贯穿风景园林设计课程教学全过程,创新课程体系,改革考核方式,优化课程过程管理。通... 详细信息

地方工科高校在新工科背景下为了更好地适应当前的教育形势,服务区域经济社会发展,进行了风景园林设计课程改革。该文对其校地合作模式进行了实践探索,贯穿风景园林设计课程教学全过程,创新课程体系,改革考核方式,优化课程过程管理。通过对校地合作模式的探索与实践,形成了协同育人的目标,提高了风景园林专业学生的实践能力,探索出校地合作的风景园林课程新教学模式,课程充分体现了产教深度融合的新理念,使学生更好地适应未来的工作环境。

关键词：新工科风景园林校地合作设计课程探索与实践课程改革

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A location-based fog computing optimization of energy management in smart buildings:DEVS modeling and design of connected objects

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中国计算机科学前沿:英文版 2023年第2期17卷 179-195页

作者： Abdelfettah MAAToUG Ghalem BELALEM saïd MAHMoUDI Computer Science Department Faculty of Exact and Applied SciencesUniversity of Oran 1 Ahmed Ben BellaOran 31000Algeria Science and Technology Department Faculty of Science and TechnologyUniversity of TIARETTiaret 14000Algeria Computer Science Department Faculty of EngineeringUniversity of MonsMons 7000Belgium

Nowadays,smart buildings rely on Internet of things(loT)technology derived from the cloud and fog computing paradigms to coordinate and collaborate between connected *** is characterized by low latency with a wider spread and geographically distributed nodes to support mobility,real-time interaction,and location-based *** provide optimum quality of user life in moderm buildings,we rely on a holistic Framework,designed in a way that decreases latency and improves energy saving and services efficiency with different *** EVent system Specification(DEVS)is a formalism used to describe simulation models in a modular *** this work,the sub-models of connected objects in the building are accurately and independently designed,and after installing them together,we easily get an integrated model which is subject to the fog computing *** results show that this new approach significantly,improves energy efficiency of buildings and reduces ***,with DEVS,we can easily add or remove sub-models to or from the overall model,allowing us to continually improve our designs.

关键词： smart building energy consumption IoT fog computing Framework DEVS simulation models

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Practices of backuping homomorphically encrypted databases

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Frontiers of Computer Science 2019年第2期13卷 220-230页

作者： sa WANG Yiwen SHAo Yungang BAo SKL Computer Architecture Institute of Computing Technology Chinese Academy of Sciences Beijing 100190 China University of Chinese Academy of Sciences Beijing 100049 China

Ideal homomorphic encryption is theoretically achievable but impractical in reality due to tremendous computing overhead. Homomorphically encrypted databases, such as CryptDB, leverage replication with partially homomorphic encryption schemes to support different SQL queries over encrypted data directly. These databases reach a balance between security and efficiency, but incur considerable storage overhead, especially when making backups. Unfortunately, general data compression techniques relying on data similarity exhibit inefficiency on encrypted data. We present CryptZip, a backup and recovery system that could highly reduce the backup storage cost of encrypted databases. The key idea is to leverage the metadata information of encryption schemes and selectively backup one or several columns among semantically redundant columns. The experimental results show that CryptZip could reduce up to 90.5% backup storage cost on TPC-C benchmark.

关键词： homomorphic encryption security deduplication

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A new series of environment-friendly reddish inorganic pigments based on AFeo_(3)(A=Ln,Y) with high NIR solar reflectance

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Journal of Materiomics 2021年第5期7卷 1061-1073页

作者： Maria Fortuño-Morte Pablo Serna-Gallén Héctor Beltrán-Mir Eloísa Cordoncillo Departamento de Química Inorgánica y orgánica Universitat Jaume IAv.Sos Baynat s/n12071Castellóde la PlanaSpain

Environment-friendly pigments based on AFeo_(3)(A=La,Pr,Nd,Sm,Gd,Tb,Y or Yb)with high nearinfrared(NIR)reflectance were synthesised by a coprecipitation method at 1200℃.The Rietveld refinement analysis showed single-phase orthorhombic perovskite for all *** pigments,which showed reddish hues,offered good colour stability after mixing these pigments in powder form with siloxane transparent paint and two different *** powderepaint mixtures produced with GdFeo_(3),TbFeo_(3) and YFeo_(3) pigments have the highest NIR solar reflectance,reaching values of R=50%.The temperature shielding studies conducted using TbFeo_(3) pigmentepaint mixture for a roof coating yielded a reduction of 3.2℃ in comparison to a commercial ***,the glazes that were pigmented using GdFeo_(3),TbFeo_(3) and YFeo_(3) compositions also presented the most intense reddish colours.A study of the thermal and chemical stability of the pigment with the highest NIR solar reflectance showed good stability in both *** reddish pigments that were prepared can therefore be good candidates for use in different applications such as cool pigments or pigments for ceramic glazes at high temperatures.

关键词： High NIR reflectance Cool pigment Reddish pigment Environment-friendly Coprecipitation

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Artificial intelligence-based predictive model of nanoscale friction using experimental data

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Friction 2021年第6期9卷 1726-1748页

作者： Marko PERČIĆ saša ZELENIKA Igor MEZIĆ University of Rijeka Faculty of Engineering51000 RijekaCroatia University of Rijeka Centre for Micro-and Nanosciences and Technologies&Center for Artificial Intelligence and Cybersecurity51000 RijekaCroatia University of California santa Barbara Department of Mechanical EngineeringSanta BarbaraCA 93105USA

A recent systematic experimental characterisation of technological thin films,based on elaborated design of experiments as well as probe calibration and correction procedures,allowed for the first time the determination of nanoscale friction under the concurrent influence of several process parameters,comprising normal forces,sliding velocities,and temperature,thus providing an indication of the intricate correlations induced by their interactions and mutual *** created the preconditions to undertake in this work an effort to model friction in the nanometric domain with the goal of overcoming the limitations of currently available models in ascertaining the effects of the physicochemical processes and phenomena involved in nanoscale *** to the stochastic nature of nanoscale friction and the relatively sparse available experimental data,meta-modelling tools fail,however,at predicting the factual *** on the acquired experimental data,data mining,incorporating various state-of-the-art machine learning(ML)numerical regression algorithms,is therefore *** results of the numerical analyses are assessed on an unseen test dataset via a comparative statistical *** is therefore shown that the black box ML methods provide effective predictions of the studied correlations with rather good accuracy levels,but the intrinsic nature of such algorithms prevents their usage in most practical *** programming-based artificial intelligence(AI)methods are consequently finally *** the marked complexity of the analysed phenomena and the inherent dispersion of the measurements,the developed AI-based symbolic regression models allow attaining an excellent predictive performance with the respective prediction accuracy,depending on the sample type,between 72%and 91%,allowing also to attain an extremely simple functional description of the multidimensional dependence of nanoscale friction on the studied variable process param

关键词： nanoscale friction thin films data mining machine learning(ML) predictive artificial intelligence(AI)-based model

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Synthesis,Structures,and Fluorescence Property of a Novel Heterometallic Complex Constructed by Imidazole

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Chinese Journal of Structural Chemistry 2020年第5期39卷 942-948页

作者： LI sa-Ying Department of Chemistry Chemical Engineering Shaanxi Xueqian Normal UniversityXi'an 710100China

A novel heterometallic complex constructed by imidazole ligand,CoZn(C3N2H3)4(1),has been synthesized under hydrothermal *** 1 was characterized by IR spectra,thermal analysis,powder X-ray diffraction and single-crystal X-ray ***-crystal X-ray diffraction studies reveals that compound 1 is in the tetragonal system,space group I41cd with a=23.4371(5),b=23.4371(5),c=12.4430(7)?,V=6834.9(4)?3,Z=16,C12H12CoN8Zn,Mr=392.60,Dc=1.526 g/cm^3,F(000)=3152,μ=2.381 mm–1,R=0.0323 and w R=*** CoZn(C3N2H3)4 is one-dimensional heterometallic molecular chains,which are further extended into a 3D open ***,the solid-state fluorescence property of the complex has also been investigated at room temperature.

关键词： heterometallic complex crystal structure fluorescence property

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