121 research outputs found
Exploring Noise as Information
No full textMy art practice is based on the study of machines. Instead of focusing on how machines usually work, I discover and explore the noise of machines – both visually and aurally. In my work, I use a photocopier to scan and print the same image repeatedly, which results in the original image becoming distorted and abstracted with noise. This work was initially influenced by the distorted homework paper handouts I regularly received at the school in China as a child – many of which were nearly illegible. In my practice, I explore the idea of noise as information. To help provide background to this work, I discuss three main aspects: glitch art, the actor-network theory, and how it connects to my work. Through my studio projects I have explored how noise, which is often viewed as an unwanted by product, can be used as the main content of a piece of work. Each form of communication technology has its own types of noise, which has its own aesthetic and style – and my hope is that my projects highlight the beauty and texture of noise that is usually only considered in a negative way
A Cloud-Based DevOps Toolchain for Efficient Software Development
No full textIn the traditional software development life cycle, development and operation are divided into different departments. The conflict between departments and, besides, the lack of automation usually leads to low software development efficiency and slow software delivery. Thus, the concept of DevOps is introduced, which combines different departments and automates the process to make software delivery faster and easier. The DevOps toolchain is one important component for adopting DevOps. On the other hand, the adaptation of cloud technology, especially serverless computing makes it tempting for us to investigate what benefits serverless computing brings to the DevOps toolchain. In the first research question, we examine the benefits that AWS serverless platforms bring to DevOps toolchain. To answer this research question, we develop a DevOps toolchain hosted in Amazon Web Services (AWS) and leverage the serverless computing service. In addition, we examine what does each serverless computing service brings to the DevOps toolchain, examine how does the performance of the DevOps toolchain changes with or without using serverless computing service. Our research shows that serverless computing services such as AWS Fargate could reduce the cost, operation effort, and improves performance by enabling parallel execution. Our experiments show that in contrast to a toolchain hosted in a traditional cloud server vs the toolchain that was developed by us using serverless computing service could reduce the total runtime of parallel execution up to 65%. In the second research question, we focus on the integrated toolchain build with AWS DevOps tools from AWS serverless platform. We build a demo integrated DevOps toolchain with AWS DevOps tools and compare the integrated toolchain with the non-integrated toolchain that we built. We find that the integrated toolchain significantly reduces the development time by providing an out-of-box solution for the software team. In addition, the better integration with underlying cloud infrastructure provides more functionality such as global monitoring and blue/green deployment. However, we also find that from the experiment that the performance of the integrated toolchain is lower due to the limitation of resources which also come with a high cost.Computer Scienc
Multi-objective coordinated control of wind turbines in wind farms based on active yaw control
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A novel analytical wake model for floating offshore wind turbines with pitch motion effects
No full textWith the growing scale of offshore wind farms, the resulting intensification of wake effects between floating offshore wind turbines (FOWTs) adversely affects the overall power generation efficiency. Traditional wake models demonstrate limitations in predicting the complex wakes generated by FOWTs experiencing motions in marine conditions, particularly the pitch motion induced by waves. This paper presents a novel three-dimensional anisotropic analytical wake model, which incorporates the influence of periodic pitch motion and wind shear. Additionally, the model employs Gaussian distribution to characterize the wake in the near-wake region (pressure-dominated), resolving the limitations of traditional three-dimensional wake models that rely on top-hat distributions in this region. The detailed derivation process is demonstrated in the paper. The model is validated against published wind tunnel measurement and high-fidelity CFD data, demonstrating its accuracy and applicability. Finally, the impact of varying pitch amplitudes on the wake velocity distribution is analyzed. The results show that at the downwind position of X/D=5, which is a typical interval among wind turbines, the normalized speed at pitch amplitudes of 2, 5, 8, 10 degrees is 1.015, 1.036, 1.055 and 1.069 times that of 0 degrees, respectively. The proposed wake model can effectively evaluate the wake distribution of FOWTs with different pitch amplitudes. This study can provide reference for the wake modeling of FOWTs
Analyzing Online News Dissemination Patterns via Social Network Hypergraph Model
No full textThis study aims to develop a novel method for analyzing the complex dissemination patterns of online media news using a social network hypergraph model, addressing the limitations of traditional graph models in capturing many-to-many relationships in news dissemination. The author integrates news content, user nodes, and topic tags into a multi-dimensional hypergraph structure. The approach includes detailed analysis of key elements of news dissemination across four dimensions (subject, content, channel, and effect), construction of the hypergraph model, and design of mechanisms for extracting dissemination paths and evaluating influencing factors. Experiments were conducted on real-world data from multiple social platforms to validate the method's effectiveness. The results demonstrate that the proposed hypergraph model outperforms traditional models (GCN, GAT, and RF) in terms of accuracy, F1 value, and error control. The model effectively reflects the complex structure and dynamic evolution of news dissemination, revealing significant factors such as user activity, topic sensitivity, and structural entropy. This research offers a new perspective on understanding and optimizing online news dissemination by leveraging the hypergraph model's ability to capture multi-dimensional interactions. It provides a more comprehensive and accurate analysis framework, laying a theoretical foundation for constructing efficient information dissemination models
Effective mechanisms in the formation of pool-rimstone dams in continental carbonate systems: The case study of Huanglong, China
No full textThe tufa/travertine landscape is an important heritage and ecological wealth given to mankind by nature, of which rimstone dam limiting pools are important features that allow their development. This study explores the mechanisms influencing the formation of rimstone dams through the study of depositional behavior in the short-term under hydrodynamic action, hydrochemical changes, and biological characterization, independent from the long-term dynamics. Numerical simulations clearly show the complex flow regimes of the paired pool and rimstone dam. Differences in flow regime and particle transport distribution in different areas of the pool lead to differences in deposition at different areas of the pool. Hydrodynamic effects generate morphological changes of the pool-rimstone dam by promoting the deposition on the outer wall of the dam and causing no-deposition and remobilization (erosion in a broad sense) in the inner wall. Significant changes in the ion concentrations of Ca2+ and HCO3− occur at short distances in the external upper and lower parts of the dam, suggesting that the thin layer of water and high velocity conditions in the outer wall of the rimstone dam facilitate precipitation. Biological processes influence the development of rimstone dam and promote its thickening. The plant remains of leaves, branches, and roots provide the basic depositional framework and depositional template for rimstone dam growth. Besides, microorganisms affect the micro-morphology of calcite through their own metabolism. This study aims to clarify the mechanisms of pool-rimstone dam formation by exploring the interactions between abiogenic and biogenic controls within a hydrodynamic model.Fil: Zhang, Ting. Southwest University Of Science And Technology; ChinaFil: Dai, Qunwei. Southwest University Of Science And Technology; ChinaFil: An, Dejun. Huanglong National Scenic Resort Administrative Bureau; ChinaFil: Mors, Rodolfo Agustín. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; ArgentinaFil: Li, Qiongfang. Southwest University Of Science And Technology; ChinaFil: Astini, Ricardo Alfredo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; ArgentinaFil: He, Jingwen. Southwest University Of Science And Technology; ChinaFil: Cui, Jie. Southwest University Of Science And Technology; ChinaFil: Jiang, Ruiyang. Southwest University Of Science And Technology; ChinaFil: Dong, Faqin. Southwest University Of Science And Technology; ChinaFil: Dang, Zheng. Southwest University Of Science And Technology; Chin
Route-Friendly Navigation With 3D Curved City Visualization
No full text3D city navigation can provide spatial information services in the rapidly changing geographical context and is widely used in commercial systems and scientific research. Traditional 3D navigation has an occlusion effects because of 3D buildings that impedes the transmission, acquisition, and perception of geographic information. This paper introduces 3D curved city visualization with visualization of unobstructed paths, customized visualization of landmarks, and multiple navigation modes into 3D city navigation. The results indicate that the proposed technique can effectively decrease the occlusion effects in 3D visual scenes, enhance users' spatial information acquisition and perception ability in 3D city navigation scenes with dynamic changes which improves users' wayfinding ability and enhances the user-friendliness of navigation
ON THE USE OF MODERN APPLICATIONS IN ENGLISH CLASS
No full textRecently, more and more modern applications have been applied to the English learning class, among which the most outstanding ones are the ‘The Rain Classroom’ and ‘The Super Star’. The first one, ‘The Rain Classroom’ is a mini-program in Wechat, through which the students can get connected to the teacher directly; they can do homework online and express their ideas on the class’ screen simultaneously. The second one, ‘The Super Star’ is an application that the students have to download on the mobile-phone, and then they can scan the teachers’ material and assignment in the app. In this essay, in order to make a comparison between the two apps, the author tries to carry an investigation and an experiment into the students, so as to find a better way of using the modern applications, in which case, can attract the students’ attention, arouse their interest and guarantee their speaking and writing hours at the same time. Furthermore, more scholars can get a better understanding of these two apps through the essay, and the producers of the app will be able to make some adjustment to them timely. This essay will form a new viewpoint on the multimedia English teaching in China, even in the world
Optimal yaw strategy and fatigue analysis of wind turbines under the combined effects of wake and yaw control
No full text202303 bcwwAccepted ManuscriptOthersResearch Institute for Sustainable Urban Development (RISUD)PublishedGreen (AAM
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