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Technical Conditions of Diamond Vaults in Poland 波兰金刚石拱顶的技术条件
Pub Date : 2024-07-19 DOI: 10.59440/ceer/191066
Łukasz Drobiec
Diamond vaults represent the greatest achievement of the Gothic architecture. Only about 130 buildings with such vaults have remained to our times, including 30 buildings in Poland. Diamond vaults are less stiff than rib vaults, and consequently more prone to damage. This paper presents technical conditions of diamond vaults in Poland, their typical damage and repair methods.
钻石拱顶是哥特式建筑最伟大的成就。时至今日,只有大约 130 座建筑保留了这种拱顶,其中包括波兰的 30 座建筑。菱形拱顶的刚度低于肋拱顶,因此更容易损坏。本文介绍了波兰菱形拱顶的技术条件、典型损坏情况和修复方法。
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引用次数: 0
Artificial Neural Network-aided Mathematical Model for Predicting Soil Stress-strain Hysteresis Loop Evolution 人工神经网络辅助数学模型预测土壤应力-应变滞后环演变
Pub Date : 2024-07-19 DOI: 10.59440/ceer/190839
Marta Bocheńska, P. Srokosz
This study presents a novel approach to forecasting the evolution of hysteresis stress-strain response of different types of soils under repeated loading-unloading cycles. The forecasting is made solely from the knowledge of soil properties and loading parameters. Our approach combines mathematical modeling, regression analysis, and Deep Neural Networks (DNNs) to overcome the limitations of traditional DNN training. As a novelty, we propose a hysteresis loop evolution equation and design a family of DNNs to determine the parameters of this equation. Knowing the nature of the phenomenon, we can impose certain solution types and narrow the range of values, enabling the use of a very simple and efficient DNN model. The experimental data used to develop and test the model was obtained through Torsional Shear (TS) tests on soil samples. The model demonstrated high accuracy, with an average R² value of 0.9788 for testing and 0.9944 for training.
本研究提出了一种新方法,用于预测不同类型土壤在重复加载-卸载循环下的滞后应力-应变响应演变。预测完全基于对土壤特性和加载参数的了解。我们的方法结合了数学建模、回归分析和深度神经网络(DNN),克服了传统 DNN 训练的局限性。作为一项创新,我们提出了滞后环演化方程,并设计了 DNNs 系列来确定该方程的参数。了解了现象的本质,我们就可以规定某些解类型并缩小取值范围,从而使用非常简单高效的 DNN 模型。用于开发和测试模型的实验数据是通过对土壤样本进行扭转剪切(TS)测试获得的。该模型具有很高的准确性,测试和训练的平均 R² 值分别为 0.9788 和 0.9944。
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引用次数: 0
Prioritization of the Requirements Formulated in the European Standard EN 206 in Assessment of Concrete Quality - Multicriteria Analysis Using the AHP Method 欧洲标准 EN 206 中制定的混凝土质量评估要求的优先排序 - 使用 AHP 方法进行多标准分析
Pub Date : 2024-03-12 DOI: 10.59440/ceer/185167
I. Skrzypczak, Agnieszka Leśniak, R. Jasiński, Eduardo Natividade
The technological process of ready-mixed concrete production, which is designed to ensure the quality of concrete and the durability of the constructed buildings in accordance with the European Standard EN 206, consists of several stages. In this standard, to ensure the stability of both the concrete production process itself and its individual stages, appropriate requirements have been formulated. Some of these requirements pertain to the on line stage of the production process, and some to the off-line stage. Some of these requirements, if not properly controlled, can disrupt the stability of the production process and also negatively impact the quality and durability of concrete structures. The article analyzes the significance of these standard requirements. For this purpose, the AHP method was used, and the Pareto principle was applied to interpret the results. The AHP analysis showed that three out of seven requirements have the most significant impact on the quality of concrete and concrete structures. These are: the constituents of concrete, the limitations for concrete composition, and the delivery of fresh concrete. The applied Pareto principle confirmed their dominant role. These three criteria account for almost 80% of the importance in ensuring the quality of concrete.
根据欧洲标准 EN 206,预拌混凝土的生产技术过程由几个阶段组成,旨在确保混凝土的质量和建筑的耐久性。为了确保混凝土生产过程本身及其各个阶段的稳定性,该标准制定了相应的要求。其中一些要求与生产过程的在线阶段有关,另一些则与离线阶段有关。其中一些要求如果控制不当,会破坏生产过程的稳定性,也会对混凝土结构的质量和耐久性产生负面影响。本文分析了这些标准要求的重要性。为此,采用了 AHP 方法,并运用帕累托原则对结果进行了解释。AHP 分析表明,七项要求中有三项对混凝土和混凝土结构的质量影响最大。它们是:混凝土的成分、混凝土成分的限制和新拌混凝土的交付。应用帕累托原则证实了它们的主导作用。这三项标准在确保混凝土质量方面的重要性几乎占到了 80%。
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引用次数: 0
Methodology of Spatial Data Acquisition and Development of High-Definition Map for Autonomous Vehicles – Case Study from Wrocław, Poland 为自动驾驶汽车获取空间数据和开发高清地图的方法--波兰弗罗茨瓦夫案例研究
Pub Date : 2024-03-08 DOI: 10.59440/ceer/185736
Martyna Siejek, D. Kasza, J. Wajs
Autonomous drive systems are a dynamically developed sector of the automotive industry. The key problem in such technological solutions is to provide a reliable navigation system, which is typically based on high-definition (HD) maps supporting the identification of the position of a maneuvering vehicle. HD maps should include possibly up-to-date and detailed information on traffic lanes and on the traffic rules and regulations on such lanes. An effective development of an HD map should be based on the geodetic measurement methods, which ensure efficient and accurate acquisition of spatial data. This article presents the results of an experiment consisting in the manipulation of data obtained with the use of the mobile laser scanning method and further in employing this data in the development of an HD map in an open-source environment. The applied measurement technology and the processing method allowed data of high resolution (frequently above 1000 points per m2) and of high accuracy (3D accuracy down to less than 5 cm). The obtained data were processed in the Vector Map Builder environment (which is accessible from the level of an internet browser) and the final product - HD map was created in the Lanelet2 open-source environment. The above-described experiments allowed two main conclusions. Most importantly, they demonstrate the importance of planning and performing in-field mobile laser scanning measurements. They also point to the important role of the human analyst who needs to manually vectorize the key elements of road infrastructure and to define traffic rules.
自动驾驶系统是汽车行业中一个蓬勃发展的领域。此类技术解决方案的关键问题是提供可靠的导航系统,该系统通常基于支持识别操纵车辆位置的高清(HD)地图。高清地图应包括有关交通线路和交通规则的最新详细信息。高清地图的有效开发应以大地测量方法为基础,以确保高效、准确地获取空间数据。本文介绍了一项实验的结果,该实验包括对使用移动激光扫描方法获得的数据进行处理,并进一步将这些数据用于在开源环境中开发高清地图。所采用的测量技术和处理方法使得数据具有高分辨率(通常每平方米超过 1000 个点)和高精度(三维精度小于 5 厘米)。获得的数据在矢量地图生成器环境(可通过互联网浏览器访问)中进行处理,最终产品--高清地图在 Lanelet2 开放源码环境中创建。上述实验得出了两个主要结论。最重要的是,它们证明了规划和执行实地移动激光扫描测量的重要性。它们还指出了人工分析师的重要作用,即需要手动矢量化道路基础设施的关键要素并定义交通规则。
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引用次数: 0
Proposal of an Encapsulation-led Disposal Method for Tannery Sludge – A Circularity Approach 制革污泥的封装主导型处置方法建议--一种循环方法
Pub Date : 2024-03-08 DOI: 10.59440/ceer/183669
S. J, V. P., Pulijala Bhavani, Ravindran T, Venkata Siva Sai G.C
In the context of achieving sustainable development goals, continuously pushing possible extended research and attempting to implement the respective outcomes in expanding a circular economy for a broad range of products are high priorities. In this paper, we considered disposable tannery sludge as a matter of concern and proposed an innovative framework for placing tannery sludge in the economic value chain via an encapsulation technique-based construction product development. We used polypropylene plastic and a cement-water matrix as encapsulation materials, and the encapsulated tannery sludge bodies were tested for their drop strength, water absorbing behaviour, ability to leach chromium and tendency to lose weight upon ignition. Value of water absorption for the prepared double layered encapsulated tannery sludge bodies was 1.332%, the drop strength performance index arrived was 90% and 0.0001 µg/g of Chromium leaching was found in Toxicity Characteristic Leaching Procedure (TCLP) and shown 67% weight loss in thermogravimetric (TGA) analysis. The results confirmed the possibility of ecocompatible disposal and recirculation of tannery sludge for the sustainable production of building blocks in the form of encapsulated bodies. The outcomes of our work add upon a new perspective to the existing literature regarding the environmentally positive utilization of tannery sludge in the production of building blocks.
在实现可持续发展目标的背景下,不断推动可能的扩展研究并尝试将各自的成果应用于扩大各种产品的循环经济是当务之急。在本文中,我们将一次性制革污泥视为一个值得关注的问题,并提出了一个创新框架,通过基于封装技术的建筑产品开发,将制革污泥置于经济价值链中。我们使用聚丙烯塑料和水泥-水基质作为封装材料,对封装后的制革污泥体进行了跌落强度、吸水性、铬浸出能力和点火失重倾向测试。制备的双层封装制革污泥体的吸水率为 1.332%,落下强度性能指数为 90%,在毒性特征浸出程序(TCLP)中发现铬浸出率为 0.0001 µg/g,在热重分析(TGA)中显示失重率为 67%。这些结果证实了生态兼容处理和再循环制革污泥的可能性,从而可持续地生产封装体形式的建筑砌块。我们的工作成果为现有文献提供了一个新的视角,即在生产建筑砌块过程中对制革污泥进行环境积极利用。
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引用次数: 0
Identification of Criteria for Evaluating the Location of Youth Recreation and Leisure Centers 确定青年娱乐休闲中心选址评估标准
Pub Date : 2024-03-08 DOI: 10.59440/ceer/184342
Natalia Rzeszowska, Adriana Jasiak
Mental comfort for any individual is an important factor on the way to achieving one's goals and objectives. Based on research focused on young people, and conducted in relation to the COVID-19 pandemic, physical activity positively affects mental comfort and is one of the social preventive measures for maintaining mental comfort. Thus, designing spaces dedicated to young people has become a common social interest. The purpose of the article was to identify criteria for locating recreational and leisure centers for young people. For the purposes of the study, a detailed literature review was conducted, following which the most relevant locational features were listed, defining criteria for evaluating their location. In addition, a keyword co-occurrence network was developed using VOSviewer software. The research was conducted on the basis of the Scopus database. The presented review highlighted the lack of comprehensive studies on the analysis of the location of youth recreation and leisure centers, which is definitely a gap that needs to be filled. Taking such a study into consideration when conducting planning work would certainly be a valuable effort to help creating a friendly urban infrastructure and an effective network of services.
对任何一个人来说,心理舒适都是实现目标和目的的重要因素。根据针对 COVID-19 大流行病开展的以年轻人为重点的研究,体育活动对心理舒适度有积极影响,是保持心理舒适度的社会预防措施之一。因此,设计专属于年轻人的空间已成为一种普遍的社会兴趣。这篇文章的目的是确定青少年娱乐休闲中心的选址标准。为了进行这项研究,我们进行了详细的文献综述,然后列出了最相关的地点特征,确定了评价其位置的标准。此外,还使用 VOSviewer 软件开发了关键词共现网络。研究是在 Scopus 数据库的基础上进行的。所提交的综述突出表明,缺乏对青少年娱乐休闲中心位置分析的全面研究,这无疑是一个需要填补的空白。在进行规划工作时,将此类研究纳入考虑范围无疑将是一项有价值的工作,有助于创建友好的城市基础设施和有效的服务网络。
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引用次数: 0
The Effect of Soil-Structure Interaction (SSI) on Structural Stability and Sustainability of RC Structures 土-结构相互作用(SSI)对钢筋混凝土结构稳定性和可持续性的影响
Pub Date : 2024-03-01 DOI: 10.59440/ceer/184254
Ragi Krishnan, Vidhyalakshmi Sivakumar
The issue of SSI involves how the ground or soil reacts to a building built on top of it. Both the character of the structure and the nature of the soil have an impact on the stresses that exist between them, which in turn affects how the structure and soil beneath it move. The issue is crucial, particularly in earthquake regions. The interaction between soil and structure is an extremely intriguing factor in increasing or reducing structural damage or movement. Structures sitting on deformable soil as opposed to strong soil will experience an increase in static settlement and a decrease in seismic harm. The engineer must take into account that the soil liquefaction problem occurs for soft ground in seismic areas. A reinforced concrete wall-frame dual framework's dynamic reaction to SSI has not been sufficiently studied and is infrequently taken into consideration in engineering practice. The structures’ seismic performance when SSI effects are taken into account is still unknown, and there are still some misconceptions about the SSI idea, especially regarding RC wall-frame dual systems. The simulation study of the soil beneath the foundations significantly impacts the framework's frequency response and dynamic properties. Therefore, the overall significance of SSI in the structural aspect and sustainability aspects will be reviewed in this research.
SSI 问题涉及地面或土壤对建在其上的建筑物的反应。结构的特性和土壤的性质都会对它们之间存在的应力产生影响,进而影响结构和其下的土壤如何移动。这个问题至关重要,尤其是在地震地区。土壤与结构之间的相互作用是增加或减少结构损坏或移动的一个极其重要的因素。与坚固的土壤相比,位于易变形土壤上的结构会增加静态沉降,减少地震危害。工程师必须考虑到地震区的软土地基会出现土壤液化问题。钢筋混凝土墙体框架双层结构对 SSI 的动力反应尚未得到充分研究,在工程实践中也很少得到考虑。考虑到 SSI 影响时结构的抗震性能仍是未知数,人们对 SSI 的概念仍存在一些误解,尤其是在钢筋混凝土墙框双系统方面。地基下土壤的模拟研究对框架的频率响应和动态特性有重大影响。因此,本研究将对 SSI 在结构和可持续性方面的整体意义进行审查。
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引用次数: 0
Strategy and Models of Buildings Maintenance – a Literature Survey 建筑物维护的战略和模式--文献调查
Pub Date : 2024-03-01 DOI: 10.59440/ceer/185397
Plebankiewicz Edyta, J. Grącki
In the article comprehensive insights into the field of building maintenance, emphasizing the importance of keywords, collaborative efforts among authors, and the evolving research landscape are provided. The study conducts a thorough literature review using Scopus as a search engine, employing the full-counting method for authorship, and VOSviewer software for bibliometric analysis. The results reveal distinct data sets focusing on building maintenance from general to specific, with each set reflecting unique aspects and considerations. Bibliometric maps illustrate author collaboration and keyword connections within each set, highlighting evolving research trends and areas of focus. The study concludes with recommendations for future research, emphasizing the ongoing need for exploration and development in building maintenance.
文章对建筑维护领域提出了全面的见解,强调了关键词的重要性、作者之间的合作努力以及不断变化的研究状况。本研究使用 Scopus 作为搜索引擎,采用作者全计数法和 VOSviewer 软件进行文献计量学分析,对文献进行了全面审查。研究结果表明,从一般到特殊的建筑维护数据集各不相同,每个数据集都反映了独特的方面和考虑因素。文献计量图显示了每组数据中的作者合作和关键词联系,突出了不断发展的研究趋势和重点领域。研究最后提出了未来研究的建议,强调了在建筑维护方面不断探索和发展的必要性。
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引用次数: 0
Mechanical and Durability Studies about the use of Municipal Solid Waste Landfill in Concrete 关于在混凝土中使用城市固体废弃物填埋场的机械和耐久性研究
Pub Date : 2024-03-01 DOI: 10.59440/ceer/184030
Arya R Nair, Nirmala D B
The best way to keep the required format of the manuscript is to overwrite these instructions with its text. Papers should be written in English. Manuscripts s Landfilling is the most common and cheapest method of waste management practice in India. Municipal Solid Waste Landfills (MSWL) became a nuisance affecting the health, hygiene, sanitation and aesthetics of the surrounding area. Aggregates occupy almost 70% of concrete, so replacing waste materials with them could be a rewarding choice. In the current work, an experimental investigation is being carried out to test the addition of MSWL as a substitution with fine aggregate for concrete production. Out of the different aged samples available at the dumpsite, the most aged sample is chosen for experimental investigations according to the basic physical properties. Concrete mixes, with 0%, 4%, 5%, 7% and 10% partial replacement of fine aggregate with MSWL are tested for mechanical properties such as compressive strength, split tensile strength, flexural strength, and non-destructive test and have proved to be a partial substitute for fine aggregate. Durability studies such as water absorption, acid attack and sulphate attack also gave better experimental proof for the sustainable reuse of this waste material. The research reveals 5% replacement is the optimum considering all the test result values. The paper leads to advanced research for the suitability of the material in the construction industry.
保持稿件所需格式的最佳方法是用其正文覆盖这些说明。论文应以英文撰写。手稿 s 垃圾填埋是印度最常见、最廉价的废物管理方法。城市固体废弃物填埋场(MSWL)已成为影响周边地区健康、卫生、环境和美观的公害。骨料几乎占混凝土的 70%,因此用骨料代替废料可能是一个有益的选择。在目前的工作中,正在进行一项实验调查,以测试在混凝土生产中添加 MSWL 作为细骨料的替代品。根据基本物理性质,从垃圾场现有的不同陈化样本中,选择陈化程度最高的样本进行实验研究。用 0%、4%、5%、7% 和 10%的城市固体废物部分替代细骨料的混凝土混合料进行了机械性能测试,如抗压强度、劈裂拉伸强度、抗弯强度和无损测试,结果证明可以部分替代细骨料。吸水性、酸侵蚀和硫酸盐侵蚀等耐久性研究也为这种废料的可持续再利用提供了更好的实验证明。研究表明,考虑到所有测试结果值,5% 的替代率是最佳的。这篇论文有助于对该材料在建筑行业的适用性进行深入研究。
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引用次数: 0
Effectiveness of Financing Measures to Reduce Low Emissions in Poland - a Case Study 波兰减少低排放融资措施的有效性--案例研究
Pub Date : 2024-03-01 DOI: 10.59440/ceer/179712
Karolina Godzisz
Local authorities are increasingly facing the challenges of climate change, which requires adaptation of various elements of local government systems, including infrastructure, communities and local economies. Operating in an ever-changing reality, local government units should plan for the necessary sustainable local government investments, with particular attention to structural gaps and financial mismatches. Local government is responsible for ensuring local energy security and thus for 'environmental sustainability'. The overall objective of this study is to assess the effectiveness of financing low-emission lowering measures from the Environmental Protection and Water Management Fund in municipalities in Lubusz Province in 2020. The article uses cause-effect relationship analysis (regression models). Investments implemented by local governments generally have a positive impact on the reduction of low emissions, although the results of the study indicate a negative impact of financing investments in alternative energy sources (RES). This may be related to large investment outlays, as well as difficulties in spatial planning, environmental impact and administrative inefficiency.
地方政府正日益面临气候变化的挑战,这就要求地方政府系统的各种要素,包括基础设 施、社区和地方经济,都要适应气候变化。在不断变化的现实中,地方政府部门应规划必要的可持续地方政府投资,尤其要关注结构性差距和财政错配问题。地方政府有责任确保地方能源安全,从而实现 "环境可持续性"。本研究的总体目标是评估 2020 年卢布斯省各市由环境保护与水管理基金资助低排放降低措施的有效性。文章采用了因果关系分析法(回归模型)。地方政府实施的投资一般会对减少低排放产生积极影响,但研究结果表明,资助替代能源(RES)投资会产生负面影响。这可能与巨额投资支出以及空间规划困难、环境影响和行政效率低下有关。
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引用次数: 0
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