Study on Thickness Control and Quantitative of Converter Lining

2013 ◽  
Vol 433-435 ◽  
pp. 2156-2163
Author(s):  
Hong Xin Zhao ◽  
Zhang Fu Yuan ◽  
Yan Wu ◽  
Yi Fang Pan ◽  
Shu Qing Li ◽  
...  
Keyword(s):  
Stability Control ◽  
Control Area ◽  
Economic Life ◽  
Converter Lining ◽  
Measuring Technique ◽  
Normal Operation ◽  
Stable Range ◽  
Late Period ◽  
Thickness Control ◽  
Campaign Life

The thickness control of lining is vital to the normal operation of converter. Vulnerable parts of the furnace would be found and repaired timely by applying thickness measuring technique by laser. According to the measured results, the load part of the facet of the converter is the weakest location of the lining in the early campaign life, while the section of the trunnion is the weakest in the middle campaign life. When it comes to the later stage of campaign, the erosion of lining is severe. In line with the quantification of erosion parts, the lining thickness range can be divided into three parts, which are safety smelting area, stability control area and dangerous area. The economic life of the furnace life, which is 20 to 23 thousand heats, can be maintained as the thinnest lining is still above the stable range when the campaign reaches mid-late period.

scholarly journals A Novel VSG-Based Accurate Voltage Control and Reactive Power Sharing Method for Islanded Microgrids

2019 ◽  
Vol 11 (23) ◽  
pp. 6666 ◽  
Author(s):  
Bowen Zhou ◽  
Lei Meng ◽  
Dongsheng Yang ◽  
Zhanchao Ma ◽  
Guoyi Xu
Keyword(s):  
Reactive Power ◽  
Control Method ◽  
Low Voltage ◽  
Voltage Drop ◽  
Reference Value ◽  
Voltage Control ◽  
Synchronous Generator ◽  
Stability Control ◽  
Control Area ◽  
Power Sharing

Islanded microgrids (IMGs) are more likely to be perturbed by renewable generation and load demand fluctuation, thus leading to system instability. The virtual synchronous generator (VSG) control has become a promising method in the microgrids stability control area for its inertia-support capability. However, the improper power sharing and inaccurate voltage control problems of the distributed generations (DGs) in microgrids still has not been solved with a unified method. This paper proposes a novel VSG equivalent control method named Imitation Excitation Control (IEC). In this method, a multi-objective control strategy for voltage and reactive power in a low voltage grid that considers a non-negligible resistance to reactance ratio (R/X) is proposed. With the IEC method, the voltage drop across feeders is compensated, thus the terminal voltage of each inverter will be regulated, which will effectively stabilize the PCC (point of common coupling) voltage and inhibit the circular current. Meanwhile, this method can realize accurate reactive power tracking the reference value, making it accessible for reactive power scheduling. What is more, the reasonability of the IEC model, namely the equivalent mechanical characteristic and transient process inertia support between VSGs and conventional synchronous generators (SG), is illustrated in this paper. Moreover, steady-state stability is proved by the small-signal modeling method, and the energy required by inertia support is given. Finally, the simulation result validates the effectiveness of the proposed method, and it is also demonstrated that the proposed method outperforms the conventional droop control method.

Measurement of the Displacement Across a Coincidence Grain Boundary

1977 ◽  
Vol 35 ◽  
pp. 124-125
Author(s):  
J. W. Matthews ◽  
W. M. Stobbs
Keyword(s):  
Grain Boundary ◽  
Grain Boundaries ◽  
Stacking Fault ◽  
The Other ◽  
Measuring Technique ◽  
High Angle ◽  
Twin Boundaries ◽  
Rigid Displacement ◽  
Cubic Crystals ◽  
Lattice Displacement

Many high-angle grain boundaries in cubic crystals are thought to be either coincidence boundaries (1) or coincidence boundaries to which grain boundary dislocations have been added (1,2). Calculations of the arrangement of atoms inside coincidence boundaries suggest that the coincidence lattice will usually not be continuous across a coincidence boundary (3). There will usually be a rigid displacement of the lattice on one side of the boundary relative to that on the other. This displacement gives rise to a stacking fault in the coincidence lattice.Recently, Pond (4) and Smith (5) have measured the lattice displacement at coincidence boundaries in aluminum. We have developed (6) an alternative to the measuring technique used by them, and have used it to find two of the three components of the displacement at {112} lateral twin boundaries in gold. This paper describes our method and presents a brief account of the results we have obtained.

Low - Voltage Scanning Electron Microscopy Imaging, Secondary and Backscatter, With Microchannel Plate Detector

1990 ◽  
Vol 48 (1) ◽  
pp. 442-442
Author(s):  
Galen Powers ◽  
Ray Cochran
Keyword(s):  
Low Voltage ◽  
Beam Current ◽  
Microchannel Plate ◽  
Normal Operation ◽  
Microscopy Imaging ◽  
Backscatter Signal ◽  
Vacuum Interface ◽  
Width Measurements ◽  
Working Distance ◽  
Beam Currents

The capability to obtain symmetrical images at voltages as low as 200 eV and beam currents less than 9 pico amps is believed to be advantageous for metrology and study of dielectric or biological samples. Symmetrical images should allow more precise and accurate line width measurements than currently achievable by traditional secondary electron detectors. The low voltage and current capability should allow imaging of samples which traditionally have been difficult because of charging or electron beam damage.The detector system consists of a lens mounted dual anode MicroChannel Plate (MCP) detector, vacuum interface, power supplies, and signal conditioning to interface directly to the video card of the SEM. The detector has been miniaturized so that it does not interfere with normal operation of the SEM sample handling and alternate detector operation. Biasing of the detector collection face will either add secondaries to the backscatter signal or reject secondaries yielding only a backscatter image. The dual anode design allows A−B signal processing to provide topological information as well as symmetrical A+B images.Photomicrographs will show some of the system capabilities. Resolution will be documented with gold on carbon. Variation of voltage, beam current, and working distance on dielectric samples such as glass and photoresist will demonstrate effects of common parameter changes.

Economic Culture of the East: China

2014 ◽  
pp. 150-160
Author(s):  
G. Lopatkin
Keyword(s):  
Economic Model ◽  
New Age ◽  
The State ◽  
Economic Life ◽  
East China ◽  
Chinese Model ◽  
Economic Culture

The article discusses the features of China’s economic culture. The author traces the genesis of the economic model of the Chinese civilization and determine its potential as an alternative to the Western one. Among the characteristic properties of the Chinese model for much of the New Age one can note technological and organizational backwardness due to the restrictions imposed on the economic life of the state-bureaucratic model of the economy. The author comes to the conclusion that the Chinese model cannot act as an alternative to the Western one.

A Realist Perspective on Contemporary "Economic Theory" (Foreword by O. Ananyin)

2006 ◽  
pp. 75-98 ◽  
Author(s):  
T. Lawson
Keyword(s):  
Economic Theory ◽  
Life Events ◽  
Alternative Model ◽  
Economic Life ◽  
Social Phenomenon ◽  
Methodological Issues ◽  
Neoclassical Theory ◽  
Fundamental Feature ◽  
Major Powers ◽  
Realist Perspective

The author elaborates on methodological issues of current tendencies in neoclassical theory and demonstrates the necessity of an alternative model of science, which he calls "realist". According to this perspective, constant and regular conjunctions of economic life events should not be the main object of analysis. Rather, the author proposes to consider structures and mechanisms governing events in question. Instead of deductivism, which, as Lawson believes, is a fundamental feature of orthodox economics, the abductive method of economic explanation is proposed that entails investigation of major powers, on which any social phenomenon depends. Society is thereby regarded not as a closed, but rather as an open system.

Campaign Life Extension of Blast Furnace Offgas System

2020 ◽  
Author(s):  
C. Lopes ◽  
C. Van der Woude ◽  
H. Ghorbani ◽  
J. Luiz de Oliveira ◽  
M. Al-Dojayli ◽  
...  
Keyword(s):  
Blast Furnace ◽  
Life Extension ◽  
Campaign Life

Palestinian Diaspora Communities in Latin America and Palestinian Statehood

2020 ◽  
Vol 19 (1) ◽  
pp. 101-120
Author(s):  
Yousef M. Aljamal ◽  
Philipp O. Amour
Keyword(s):  
Latin America ◽  
South America ◽  
Latin American ◽  
Economic Life ◽  
Self Determination ◽  
The Political ◽  
Middle Classes ◽  
Latin Americans ◽  
Political Views ◽  
The Right

There are some 700,000 Latin Americans of Palestinian origin, living in fourteen countries of South America. In particular, Palestinian diaspora communities have a considerable presence in Chile, Honduras, and El Salvador. Many members of these communities belong to the professional middle classes, a situation which enables them to play a prominent role in the political and economic life of their countries. The article explores the evolving attitudes of Latin American Palestinians towards the issue of Palestinian statehood. It shows the growing involvement of these communities in Palestinian affairs and their contribution in recent years towards the wide recognition of Palestinian rights — including the right to self-determination and statehood — in Latin America. But the political views of members of these communities also differ considerably about the form and substance of a Palestinian statehood and on the issue of a two-states versus one-state solution.

Nicolas Gueudeville's Enlightenment Utopia

Moreana ◽  
2018 ◽  
Vol 55 (Number 209) (1) ◽  
pp. 24-60
Author(s):  
Russ Leo
Keyword(s):  
Political Economy ◽  
Eighteenth Century ◽  
New World ◽  
Economic Life ◽  
Political Anthropology ◽  
French Translation ◽  
Natural Religion ◽  
Original Length ◽  
English Law

Nicolas Gueudeville's 1715 French translation of Utopia is often dismissed as a “belle infidèle,” an elegant but unfaithful work of translation. Gueudeville does indeed expand the text to nearly twice its original length. But he presents Utopia as a contribution to emergent debates on tolerance, natural religion, and political anthropology, directly addressing the concerns of many early advocates of the ideas we associate with Enlightenment. In this sense, it is not as much an “unfaithful” presentation of More's project as it is an attempt to introduce Utopia to eighteenth-century francophone audiences—readers for whom theses on political economy and natural religion were much more salient than More's own preoccupations with rhetoric and English law. This paper introduces Gueudeville and his oeuvre, paying particular attention to his revisions to Louis-Armand de Lom d'Arce, Baron de Lahontan's 1703 Nouveaux Voyages dans l'Amérique Septentrionale. Published in 1705, Gueudeville's “revised, corrected, & augmented” version of Lahontan's Voyages foregrounds the rational and natural religion of the Huron as well as their constitutive aversion to property, to concepts of “mine” and “yours.” Gueudeville's revised version of Lahontan's Voyages purports to be an anthropological investigation as well as a study of New World political economy; it looks forward, moreover, to his edition of Utopia, framing More's work as a comparable study of political economy and anthropology. Gueudeville, in other words, renders More's Utopia legible to Enlightenment audiences, depicting Utopia not in terms of impossibility and irony but rather as a study of natural religion and attendant forms of political, devotional, and economic life. Gueudeville's edition of Utopia even proved controversial due, in part, to his insistence on the rationality as well as the possibility of Utopia.

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