scholarly journals Numerical Analysis of Thermal Behaviour of DC Fuse

Energies ◽  
2020 ◽  
Vol 13 (14) ◽  
pp. 3736
Author(s):  
Adrian Plesca
Keyword(s):  
Thermal Behaviour ◽  
Thermal Model ◽  
Three Dimensional ◽  
Experimental Tests ◽  
Three Dimensional Model ◽  
Simulation Data ◽  
Different Types ◽  
Short Circuits ◽  
Good Concordance ◽  
Electrical Apparatus

One of the very well-known protections for electrical apparatus against overloads or short circuits is the fuse. It can be used to protect both AC or DC electrical installations and it has also proven its effectiveness in the protection of different loads. This paper describes a three-dimensional model of a DC fuse with two different types of fuselink notches: circular and rhombic. The obtained 3D thermal model can be used to investigate the thermal behaviour of DC fuses in both steady-state and transient conditions at different values of overloads or short circuits. With the aim to validate the proposed 3D thermal model, a series of experimental tests have been achieved. The thermal simulated values are in good concordance with the experimental results (a relative error less than ±6% has been obtained between experimental and simulation data).

scholarly journals Figurative analogies and how they are resisted in British Public Bill Committee debates

2019 ◽  
Vol 9 (1) ◽  
pp. 107-130 ◽  
Author(s):  
Kiki Y. Renardel de Lavalette ◽  
Corina Andone ◽  
Gerard J. Steen
Keyword(s):  
Case Studies ◽  
Three Dimensional ◽  
Complex Phenomenon ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Dialectical Theory ◽  
Different Types ◽  
Metaphor Use ◽  
Qualitative Analyses ◽  
The Way

Abstract This paper studies metaphor use in British Public Bill Committee debates. It focuses on the way in which legislators frame their arguments in metaphorical terms under the form of figurative analogies. Because these figurative analogies can be misleading by oversimplifying the issue under discussion, resisting them by putting forward counter-argumentation is a crucial and necessary skill. The purpose of this paper is to explore the phenomenon of countering figurative analogies in legislative debates, and to show that resistance to figurative analogies is a complex phenomenon comprising various types of criticisms to different types of metaphor. To this end, we present qualitative analyses of a number of case studies of resistance to figurative analogies found in the British Public Bill Committee debates on the Education Bill 2010–11 by employing the three-dimensional model of metaphor (Steen, 2011) and the pragma-dialectical theory of argumentation (Van Eemeren, 2010).

scholarly journals The influence of busbars connection on fuselink temperature at fast fuses

2019 ◽  
Vol 32 (2) ◽  
pp. 303-314
Author(s):  
Adrian Plesca
Keyword(s):  
Finite Element Method ◽  
Thermal Analysis ◽  
Finite Element ◽  
Thermal Behaviour ◽  
Software Package ◽  
Thermal Model ◽  
Three Dimensional ◽  
Real Situation ◽  
Load Variations ◽  
The One

The paper, based on three-dimensional thermal modelling and simulation finite element method software package, presents a comparison between the thermal behaviour of a fast fuse without busbar terminals and the one with these busbars mounted on it. The maximum fuselink temperature is lower in the second case when the thermal model had taken into consideration the busbar connections, actually, the real situation. Also, a thermal analysis for different type of load variations has been done in both cases of the fast fuse geometry with and without busbar terminals.

scholarly journals Emotional Metaphors in the Glorious Quran with Reference to Their Realizations in English

2019 ◽  
Vol 5 (3) ◽  
pp. 182
Author(s):  
Sufyan Mahdi Hammood ◽  
Raneen Waleed Khalid
Keyword(s):  
Three Dimensional ◽  
Decisive Role ◽  
Ordinary Language ◽  
Abstract Concepts ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Cognitive Perspective ◽  
Daily Experience ◽  
Linguistic System ◽  
Different Types

Metaphors are an essential part of human experience. Each person depends on their everyday experience in relation to the linguistic system so that an image is created in their mind. The purpose of this study is to investigate metaphors of emotions in the Glorious Quran from a cognitive perspective. Throughout conceptual metaphors, readers structure and understand the abstract concepts in terms of more concrete ones. They perform more significant functions when they are used in the language of the Glorious Qur’an which has intellectual, psychological and aesthetical significances. Using a three-dimensional model to analyze the data which consists of the following; First, Lakoff and Johnson's Metaphors We Live By in its two editions (1980) and (2003). Second, Arabic data depends on Al-Hayani (Metaphor in The Glorious Qur'an: Its Patterns and Rhetorical Meanings) (2016) who classifies meanings into three types; intellectual, psychological and aesthetic. Third, Newmarks' (1988) model of translation is also adopted. In this study, six Ayahs contain different types of emotions from the Glorious Quran are analyzed. The miraculous nature of the Glorious Qur'an is represented by its language which, unlike ordinary language, underlies variety of meanings. As a result, three translations are chosen; Pickhtall (1930), Ali (1987) and Hilali and Khan (1996). This study concludes that metaphors of emotions have a decisive role in our daily experience.

Design and Dynamic Simulation for Hydraulic Support

2013 ◽  
Vol 456 ◽  
pp. 230-233
Author(s):  
Dong Min Li ◽  
Yong Hai Tan ◽  
Rui Yin Xu ◽  
Jian Jun Yuan ◽  
Bao Yin Li ◽  
...  
Keyword(s):  
Dynamic Simulation ◽  
Three Dimensional ◽  
Structure Design ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Hydraulic Support ◽  
Simulation Data ◽  
Simulation Based ◽  
Screen Shot ◽  
Special Working

The whole structure of a new hydraulic support is designed according to the special working conditions, and the main parameters on its structure and dimension are calculated based on the whole structure and the corresponding formula about the structure design of hydraulic support. The entity of the new hydraulic support is modeled with Pro/E, and the whole assembling of hydraulic support is accomplished based on the former structure and dimension. Thus the dynamic simulation based on the entity model is done with Pro/E given the simulation data derived from the actual working status, and the screen shot of 3 key time nodes among the whole movement process is got, finally the simulation results prove that the design and three dimensional model are correct and available.

scholarly journals Seismic Fragility Assessment of an Isolated Multipylon Cable-Stayed Bridge Using Shaking Table Tests

2017 ◽  
Vol 2017 ◽  
pp. 1-12 ◽  
Author(s):  
Yutao Pang
Keyword(s):  
Fragility Curves ◽  
Three Dimensional ◽  
Experimental Tests ◽  
Shaking Table ◽  
Seismic Fragility ◽  
Shaking Table Tests ◽  
Three Dimensional Model ◽  
Cable Stayed Bridge ◽  
High Flexibility ◽  
Cable Stayed Bridges

In recent decades, cable-stayed bridges have been widely built around the world due to the appealing aesthetics and efficient and fast mode of construction. Numerous studies have concluded that the cable-stayed bridges are sensitive to earthquakes because they possess low damping characteristics and high flexibility. Moreover, cable-stayed bridges need to warrant operability especially in the moderate-to-severe earthquakes. The provisions implemented in the seismic codes allow obtaining adequate seismic performance for the cable-stayed bridge components; nevertheless, they do not provide definite yet reliable rules to protect the bridge. To date, very few experimental tests have been carried out on the seismic fragility analysis of cable-stayed bridges which is the basis of performance-based analyses. The present paper is aimed at proposing a method to derive the seismic fragility curves of multipylon cable-stayed bridge through shake table tests. Toward this aim, a 1/20 scale three-dimensional model of a 22.5 m cable-stayed bridge in China is constructed and tested dynamically by using the shaking table facility of Tongji University. The cable-stayed bridge contains three pylons and one side pier. The outcomes of the comprehensive shaking table tests carried out on cable-stayed bridge have been utilized to derive fragility curves based on a systemic approach.

scholarly journals THREE-DIMENSIONAL MODEL OF METASTATIC TUMOR ANGIOGENESIS IN RESPONSE TO ANTI-ANGIOGENIC FACTOR ANGIOSTATIN

2017 ◽  
Vol 17 (06) ◽  
pp. 1750094 ◽  
Author(s):  
GAIPING ZHAO ◽  
ERYUN CHEN ◽  
XIAOLI YU ◽  
HAIPO CUI ◽  
JIE LV ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Experimental Tests ◽  
Metastatic Tumor ◽  
Theoretical Models ◽  
Inhibitory Effect ◽  
Angiogenic Factor ◽  
Three Dimensional Model ◽  
Primary Tumors ◽  
Angiogenic Therapy ◽  
Therapy Strategies

Surgeons observed that primary tumors are capable of suppressing the growth of their metastases by generating anti-angiogenic factor angiostatin. A three-dimensional (3D) mathematical model of development of the metastatic tumor vasculature is presented to simulate the morphology and construction of 3D microvascular networks under the inhibitory effect of anti-angiogenic factor angiostatin excreted by the primary tumor. The simulation results demonstrate that metastatic tumor microvascular density (MVD) decreases by about 60%, 58% and 52%, respectively, at [Formula: see text], 7 and 14 days under the effect of anti-angiogenic factor angiostatin. The abnormal geometric and morphological features of 3D microvasculature networks inside and outside the metastatic tumor improve in the presence of angiostatin. The present model may allow to simulate experimental tests and may provide theoretical models for clinical research of anti-angiogenic therapy strategies.

scholarly journals Theoretical Thermal-Mechanical Modelling and Experimental Validation of a Three-Dimensional (3D) Electrothermal Microgripper with Three Fingers

Micromachines ◽  
2021 ◽  
Vol 12 (12) ◽  
pp. 1512
Author(s):  
Guoning Si ◽  
Liangying Sun ◽  
Zhuo Zhang ◽  
Xuping Zhang
Keyword(s):  
Degrees Of Freedom ◽  
Experimental Validation ◽  
Three Dimensional ◽  
Experimental Tests ◽  
Rectilinear Motion ◽  
The Novel ◽  
Mechanical Modeling ◽  
Polyimide Films ◽  
Electrothermal Actuator ◽  
Different Types

This paper presents the theoretical thermal-mechanical modeling and parameter analyses of a novel three-dimensional (3D) electrothermal microgripper with three fingers. Each finger of the microgripper is composed of a bi-directional Z-shaped electrothermal actuator and a 3D U-shaped electrothermal actuator. The bi-directional Z-shaped electrothermal actuator provides the rectilinear motion in two directions. The novel 3D U-shaped electrothermal actuator offers motion with two degrees of freedom (DOFs) in the plane perpendicular to the movement of the Z-shaped actuator. As a result, each finger possesses 3D mobilities with three DOFs. Each beam of the actuators is heated externally with polyimide films. In this work, the static theoretical thermal-mechanical model of the 3D U-shaped electrothermal actuator is established. Finite-element analyses and experimental tests are conducted to verify and validate the model. With this model, parameter analyses are carried out to provide insight and guidance on further improving the 3D U-shaped actuator. Furthermore, a group of micro-manipulation experiments are conducted to demonstrate the flexibility and versality of the 3D microgripper on manipulate different types of small/micro-objects.

An Efficient Quasi-Three-Dimensional Model of Tilting Pad Journal Bearing for Turbomachinery Applications

2015 ◽  
Vol 137 (6) ◽  
Author(s):  
Andrea Rindi ◽  
Stefano Rossin ◽  
R. Conti ◽  
A. Frilli ◽  
E. Galardi ◽  
...  
Keyword(s):  
High Speed ◽  
Computational Cost ◽  
Three Dimensional ◽  
Experimental Tests ◽  
Journal Bearings ◽  
Three Dimensional Model ◽  
Accurate Analysis ◽  
Technical Data ◽  
Plant Behavior ◽  
Tilting Pad

The constant increase of turbomachinery rotational speed has brought the design and the use of journal bearings to their very limits: tilting pad journal bearings (TPJBs) have been introduced for high-speed/high-load applications due to their intrinsic stability properties and can be used both in transient and steady-state operations obtaining superior performances. An accurate analysis of the TPJBs behavior is essential for a successful design and operation of the system; however, it is necessary to reach a compromise between the accuracy of the results provided by the TPJB model and its computational cost. This research paper exposes the development of an innovative and efficient quasi-3D TPJB modeling approach that allows the simultaneous analysis of the system rotordynamics and the supply plant behavior; the majority of existing models describe these aspects separately but their complex interaction must be taken into account to obtain a more accurate characterization of the system. Furthermore, the proposed model is characterized by a high numerical efficiency and modularity, allowing for complex transient simulations of the complete plant and for the representation of different kind of bearings. The TPJB model has been developed and experimentally validated in collaboration with an industrial partner which provided the technical data of the system and the results of experimental tests.

Ultrastructural Investigations of the Contractile Filaments of Amoebae

1974 ◽  
Vol 32 ◽  
pp. 188-189
Author(s):  
P.L. Moore
Keyword(s):  
Cytoplasmic Streaming ◽  
Three Dimensional ◽  
Freeze Fracture ◽  
Amoeboid Movement ◽  
Different Types ◽  
Chemical Conditions ◽  
Complete Interpretation

Previous freeze fracture results on the intact giant, amoeba Chaos carolinensis indicated the presence of a fibrillar arrangement of filaments within the cytoplasm. A complete interpretation of the three dimensional ultrastructure of these structures, and their possible role in amoeboid movement was not possible, since comparable results could not be obtained with conventional fixation of intact amoebae. Progress in interpreting the freeze fracture images of amoebae required a more thorough understanding of the different types of filaments present in amoebae, and of the ways in which they could be organized while remaining functional.The recent development of a calcium sensitive, demembranated, amoeboid model of Chaos carolinensis has made it possible to achieve a better understanding of such functional arrangements of amoeboid filaments. In these models the motility of demembranated cytoplasm can be controlled in vitro, and the chemical conditions necessary for contractility, and cytoplasmic streaming can be investigated. It is clear from these studies that “fibrils” exist in amoeboid models, and that they are capable of contracting along their length under conditions similar to those which cause contraction in vertebrate muscles.

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