OWL‐based acquisition and editing of computer‐interpretable guidelines with the CompGuide editor

Computer‐Interpretable Guidelines (CIGs) are the dominant medium for the delivery of clinical decision support, given the evidence‐based nature of their source material. Therefore, these machine‐readable versions have the ability to improve practitioner performance and conformance to standards, with availability at the point and time of care. The formalisation of Clinical Practice Guideline knowledge in a machine‐readable format is a crucial task to make it suitable for the integration in Clinical Decision Support Systems. However, the current tools for this purpose reveal shortcomings with respect to their ease of use and the support offered during CIG acquisition and editing. In this work, we characterise the current landscape of CIG acquisition tools based on the properties of guideline visualisation, organisation, simplicity, automation, manipulation of knowledge elements, and guideline storage and dissemination. Additionally, we describe the CompGuide Editor, a tool for the acquisition of CIGs in the CompGuide model for Clinical Practice Guidelines that also allows the editing of previously encoded guidelines. The Editor guides the users throughout the process of guideline encoding and does not require proficiency in any programming language. The features of the CIG encoding process are revealed through a comparison with already established tools for CIG acquisition.     

An Advanced Analysis of Cloud Computing Concepts Based on the Computer Science Ontology

Our primary research hypothesis stands on a simple idea: The evolution of top-rated publications on a particular theme depends heavily on the progress and maturity of related topics. And this even when there are no clear relations or some concepts appear to cease to exist and leave place for newer ones starting many years ago. We implemented our model based on Computer Science Ontology (CSO) and analyzed 44 years of publications. Then we derived the most important concepts related to Cloud Computing (CC) from the scientific collection offered by Clarivate Analytics. Our methodology includes data extraction using advanced web crawling techniques, data preparation, statistical data analysis, and graphical representations. We obtained related concepts after aggregating the scores using the Jaccard coefficient and CSO Ontology. Our article reveals the contribution of Cloud Computing topics in research papers in leading scientific journals and the relationships between the field of Cloud Computing and the interdependent subdivisions identified in the broader framework of Computer Science.     

Direct repair of self-intersecting meshes

A fast and exact algorithm to eliminate intersections from arbitrary triangle meshes is presented, without any strict requirement on the input. Differently from most recent approaches, our method does not rely on any intermediate representation of the solid. Conversely, we directly cut and stitch mesh parts along the intersections, which allows to easily inherit possible surface attributes such as colors and textures. We rely on standard floating point arithmetics whenever possible, while switching to exact arithmetics only when the available fixed precision is insufficient to guarantee the topological correctness of the result. Our experiments show that the number of these switches is extremely low in practice, and this makes our algorithm outperform all the state-of-the-art methods that provide a guarantee of success. We show how our method can be exploited to quickly extract the so-called outer hull even if the resulting model is non manifold by design and the single parts have boundaries, as long as the outer hull itself is unambiguously definable.     

粉末循环老化对GH4169激光熔覆修复组织和性能的影响

目的 探究激光熔覆修复工艺中,循环使用对粉末造成的老化效应及其对组织和性能造成的影响,为粉末循环工艺提供相关理论依据和指导。方法 针对GH4169高温合金,进行了粉末循环利用的实验,将激光熔覆制造过程中的残余粉末再次投入送粉器,进行多次回收循环制造过程。使用扫描电子显微镜、X射线能谱仪、万能力学试验机等设备,研究了粉末在循环使用过程中的演变,以及循环使用前后熔覆修复组织的微观形貌、维氏硬度、弯曲强度性能的差异。结果 随着回收循环次数增加,粉末粒径增大,表面出现熔融现象,粉末的成分出现了变化,其中Nb元素含量显著上升。在回收粉末中发现了具有磁性的杂质颗粒。相比于使用新粉末,使用回收粉末得到的熔覆组织中的Nb元素偏析程度增大,晶粒组织粗化。经过4轮循环后,熔覆层硬度自325.13HV下降至282.81HV,修复试样弯曲强度自785.85 MPa下降至739.41 MPa,下降幅度约为5%。结论 循环工艺对粉末产生了明显的老化影响,这一老化行为从能量和成分两个方面导致了激光熔覆修复GH4169合金组织和性能的劣化。     

居住建筑室内空间与环境质量调查与分析

通过对武汉关山区各个住宅小区内居住室内环境的调查，分析了影响居住空间与环境质量的各个因素，并对今后的居住建筑空间与环境设计提出一些建议。     

FRP约束混凝土柱的研究和应用简述

纤维增强复合材料(FRP)在土木工程中的研究应用是目前国内外土木工程领域研究开发的一个热点。本文总结了目前FRP约束混凝土柱的研究现状,并对其应用中的几个关键问题进行了探讨,同时对其今后的发展与应用进行了展望。     

混凝土施工缺陷及修补措施

分析了产生混凝土缺陷的原因，对各种缺陷介绍了修补措施，阐述了修补作业工艺，指出混凝土施工中应加强施工管理，避免出现缺陷，及时修补缺陷，以利于工程的顺利进行。     

沿海混凝土建筑破坏原因与修复办法

对沿海混凝土工程破坏的主要形式 :氯化物侵蚀、碳化侵蚀、碱—集料反应、冻融循环、盐类侵蚀的破坏机理、条件及特征进行分析 ,并介绍了切实可行的修复办法