Obstacle identification for the development of pumped hydro storage using abandoned mines: A novel multi-stage analysis framework

2022 ◽  
Vol 48 ◽  
pp. 104022
Author(s):  
Jingguo Xue ◽  
Xueliang Hou ◽  
Jianli Zhou ◽  
Xiaobing Liu ◽  
Yu Guo
Keyword(s):  
Abandoned Mines ◽  
Analysis Framework ◽  
Multi Stage ◽  
Stage Analysis

Analysis of the Effect of Multi-Row and Multi-Passage Aerodynamic Interaction on the Forced Response Variation in a Compressor Configuration: Part 2 — Effects of Additional Structural Mistuning

2017 ◽  
Author(s):  
Johann Gross ◽  
Malte Krack ◽  
Harald Schoenenborn
Keyword(s):  
Epistemic Uncertainty ◽  
Element Model ◽  
Forced Response ◽  
Aerodynamic Loading ◽  
Multi Stage ◽  
Blade Row ◽  
Random Mistuning ◽  
Response Variation ◽  
Stage Analysis ◽  
Turbomachinery Design

The prediction of aerodynamic blade forcing is a very important topic in turbomachinery design. Usually, the wake from the upstream blade row and the potential field from the downstream blade row are considered as the main causes for excitation, which in conjunction with relative rotation of neighboring blade rows, give rise to dynamic forcing of the blades. In addition to those two mechanisms so-called Tyler-Sofrin (or scattered or spinning) modes, which refer to the acoustic interaction with blade rows further up- or downstream, may have a significant impact on blade forcing. In particular, they lead to considerable blade-to-blade variations of the aerodynamic loading. In part 1 of the paper a study of these effects is performed on the basis of a quasi 3D multi-row and multi-passage compressor configuration. Part 2 of the paper proposes a method to analyze the interaction of the aerodynamic forcing asymmetries with the already well-studied effects of random mistuning stemming from blade-to-blade variations of structural properties. Based on a finite element model of a sector, the equations governing the dynamic behavior of the entire bladed disk can be efficiently derived using substructuring techniques. The disk substructure is assumed as cyclically symmetric, while the blades exhibit structural mistuning and linear aeroelastic coupling. In order to avoid the costly multi-stage analysis, the variation of the aerodynamic loading is treated as an epistemic uncertainty, leading to a stochastic description of the annular force pattern. The effects of structural mistuning and stochastic aerodynamic forcing are first studied separately and then in a combined manner for a blisk of a research compressor without and with aeroelastic coupling.

An Analysis of the Working Memories of Expert Sport Instructors

2006 ◽  
Vol 25 (2) ◽  
pp. 149-165 ◽  
Author(s):  
Bryan McCullick ◽  
Paul Schempp ◽  
Shan-Hui Hsu ◽  
Jin Hong Jung ◽  
Brad Vickers ◽  
...  
Keyword(s):  
Knowledge Base ◽  
Teaching And Learning ◽  
Expert Teachers ◽  
Distinguishing Characteristic ◽  
Analysis Framework ◽  
Memory Aids ◽  
Skill Analysis ◽  
Stage Analysis ◽  
Hierarchical Manner ◽  
Instructional Situations

A distinguishing characteristic of expert teachers appears to be an excellent memory (Berliner, 1986; Tan, 1997). Possessing an excellent memory aids experts in building a substantial knowledge base relative to teaching and learning. Despite its importance, the memory skills of expert teachers have yet to be investigated. Therefore, the purpose of this study was to analyze the working memories of expert sport instructors. Forty-three expert teachers served as subjects for this study. Each teacher was shown a series of slides depicting play and instructional situations in their respective domains. The test required that the subjects view a slide for 5 seconds and then recall as much as they could from the slide. The audio taped responses were transcribed and then analyzed inductively using Huberman and Miles’ (1995) four stage analysis framework to draw themes and commonalities from the data. The findings revealed three themes of experts’ working memories: (a) voluminous and rich, (b) a dominant order, and (c) include a thorough skill analysis. There is support for Berliner (1986) and Tan’s (1997) contention that experts have excellent memories, arrange their knowledge in a hierarchical manner, and are able to discern the important from the unimportant.

scholarly journals From hanging out to figuring it out: Socializing online as a pathway to computational thinking

2020 ◽  
pp. 146144482092367
Author(s):  
Samantha Shorey ◽  
Benjamin Mako Hill ◽  
Samuel Woolley
Keyword(s):  
New Media ◽  
Social Engagement ◽  
Computational Thinking ◽  
User Engagement ◽  
Youth Engagement ◽  
Online Platforms ◽  
Multi Stage ◽  
Media Environments ◽  
Stage Analysis ◽  
Over Time

Although socializing is a powerful driver of youth engagement online, platforms struggle to leverage social engagement to promote learning. We seek to understand this dynamic using a multi-stage analysis of over 14,000 comments on Scratch, an online platform designed to support learning about programming. First, we inductively develop the concept of “participatory debugging”—a practice in which users learn through the process of collaborative technical troubleshooting. Second, we use a content analysis to establish how common the practice is on Scratch. Third, we conduct a qualitative analysis of user activity over time and identify three factors that serve as social antecedents of participatory debugging: (1) sustained community, (2) identifiable problems, and (3) what we call “topic porousness” to describe conversations that are able to span multiple topics. We integrate these findings in a framework that highlights a productive tension between the desire to promote learning and the interest-driven sub-communities that drive user engagement in many new media environments.

Multi-stage analysis and design of power turbines using APNASA

2000 ◽  
Author(s):  
Jiang Luo ◽  
Chris Twardochleb ◽  
Ulrich Stang ◽  
Eli Razinsky
Keyword(s):  
Analysis And Design ◽  
Multi Stage ◽  
Stage Analysis

scholarly journals Multi-stage analysis of gene expression and transcription regulation in C57/B6 mouse liver development

Genomics ◽  
2009 ◽  
Vol 93 (3) ◽  
pp. 235-242 ◽  
Author(s):  
Tingting Li ◽  
Jian Huang ◽  
Ying Jiang ◽  
Yan Zeng ◽  
Fuchu He ◽  
...  
Keyword(s):  
Gene Expression ◽  
Transcription Regulation ◽  
Mouse Liver ◽  
Liver Development ◽  
Multi Stage ◽  
Stage Analysis

A multi-stage analysis of network slicing architecture for 5G mobile networks

2019 ◽  
Vol 73 (2) ◽  
pp. 205-221 ◽  
Author(s):  
Salman A. AlQahtani ◽  
Waseem A. Alhomiqani
Keyword(s):  
Mobile Networks ◽  
Network Slicing ◽  
Multi Stage ◽  
Stage Analysis ◽  
5G Mobile Networks
Sign in / Sign up

Export Citation Format

Share Document