scholarly journals Extension of Elastic Models to Decagonal Quasicrystals

Crystals ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 469
Author(s):  
Wu Li ◽  
Yiqing Shi
Keyword(s):  
Potential Function ◽  
Function Theory ◽  
Potential Functions ◽  
Two Dimensional ◽  
Positive Role ◽  
Main Design ◽  
Decagonal Quasicrystals ◽  
The Future ◽  
Plane Defect

The main design of this paper is to adopt potential functions for solving plane defect problems originating from two-dimensional decagonal quasicrystals. First, we analyze the strict potential function theory for the plane problems of two-dimensional quasicrystals. To clarify effectiveness of the method, we give some examples and the results which can be precisely determined, including the elasticity and fracture theories of two-dimensional quasicrystals. These results maybe play a positive role in studying the fracture of two-dimensional quasicrystals in the future.

scholarly journals Effects of Value Perception, Environmental Regulation and Their Interaction on the Improvement of Herdsmen’s Grassland Ecological Policy Satisfaction

2021 ◽  
Vol 18 (6) ◽  
pp. 3078
Author(s):  
Mingyue Li ◽  
Pujie Zhao ◽  
Lianbei Wu ◽  
Kai Chen
Keyword(s):  
Environmental Regulation ◽  
Economic Benefits ◽  
Incentive Regulation ◽  
Two Dimensional ◽  
Ecological Compensation ◽  
Positive Role ◽  
Value Perception ◽  
Environmental Value ◽  
Ecological Protection ◽  
Ecological Conservation

Sustainable utilization of grassland resources was an important topic concerned by worldwide countries and regions, and ecological compensation had gradually become the main policy tool for grassland environmental management and ecological protection. This study adopted face-to-face interviews and questionnaires, and multiordered Logit model was then used to explore herdsmen’s satisfaction with Grassland Ecological Conservation Subsidy and Reward Policy (GECSRP) focusing on identifying the key factors behind it. Results showed that herdsmen were not satisfied with GECSRP on the whole, while value perception, environmental regulation and their interaction played a positive role on improving the satisfaction. Specifically, economic benefits had the strongest promotion impacts, followed by social identity in the two-dimensional variables of value perception. The guiding regulation had stronger promoting impacts, followed by the incentive regulation in the two-dimensional variables of environmental regulation. Interestingly, incentive regulation played an enhanced interaction on the influence of economic benefits and environmental value on herdsmen’s satisfaction, yet the interaction between guiding regulation and environmental value was not significant. These indicated that herdsmen paid more attention to substantial subsidies and rewards in the process of ecological livestock husbandry, and environmental regulation formulated by government had a phenomenon of “relative system failure”. Thus, the grassland ecological environment policy should be further adjusted and improved to promote the economic development of pastoral areas.

scholarly journals Strong second harmonic generation in SiC, ZnO, GaN two-dimensional hexagonal crystals from first-principles many-body calculations

2015 ◽  
Vol 17 (14) ◽  
pp. 9533-9540 ◽  
Author(s):  
C. Attaccalite ◽  
A. Nguer ◽  
E. Cannuccia ◽  
M. Grüning
Keyword(s):  
Second Harmonic Generation ◽  
Real Time ◽  
Harmonic Generation ◽  
First Principles ◽  
Function Theory ◽  
Second Harmonic ◽  
Two Dimensional ◽  
Many Body ◽  
Ti:Sapphire Laser ◽  
Hexagonal Crystals

By using a real-time approach based on Green's function theory we predict a strong second-harmonic generation (SHG) for frequencies at which Ti:sapphire laser operates and for which the materials are transparent.

The derivation of the rotational potential function from atom–atom potentials. III. Borohydride compounds

1988 ◽  
Vol 66 (4) ◽  
pp. 791-793 ◽  
Author(s):  
David Smith
Keyword(s):  
Transition Temperature ◽  
Experimental Method ◽  
Potential Function ◽  
Ground Level ◽  
Potential Functions ◽  
The Difference ◽  
Level Degeneracy ◽  
Entropy Of Transition ◽  
Good Agreement

The rotational potential functions for the borohydride ion embedded in potassium and rubidium halides are derived from atom–atom potentials of the Buckingham (exp-6) type. The librational frequencies computed from the potential functions are in good agreement with the observed frequencies. The potential functions for rubidium and potassium borohydrides derived from the atom–atom potentials yield librational frequencies that are about 10% higher than the observed values. Since the entropy of transition for potassium and rubidium borohydrides is less than expected, there is a possibility that there is some ordering of the borohydride ions above the transition temperature. An experimental method is presented for studying the ordering of the borohydride ions based on the difference in the ground level degeneracy of a tetrahedral ion in ordered and disordered states.

Control of Multiple Mobile Agents Via Artificial Potential Functions and Random Motion

2007 ◽  
Author(s):  
Manish Kumar ◽  
Devendra P. Garg ◽  
Randy Zachery
Keyword(s):  
Potential Function ◽  
Mobile Agents ◽  
Formation Control ◽  
Cluster Formation ◽  
Limited Range ◽  
Random Motion ◽  
Potential Functions ◽  
Random Behavior ◽  
Artificial Potential Function ◽  
Multiple Mobile Agents

This paper investigates the effectiveness of designed random behavior in cooperative formation control of multiple mobile agents. A method based on artificial potential functions provides a framework for decentralized control of their formation. However, it implies heavy communication costs. The communication requirement can be replaced by onboard sensors. The onboard sensors have limited range and provide only local information, and may result in the formation of isolated clusters. This paper proposes to introduce a component representing random motion in the artificial potential function formulation of the formation control problem. The introduction of the random behavior component results in a better chance of global cluster formation. The paper uses an agent model that includes both position and orientation, and formulates the dynamic equations to incorporate that model in artificial potential function approach. The effectiveness of the proposed method is verified via extensive simulations performed on a group of mobile agents and leaders.

Research on Two-dimensional MXenes Based Synaptic Devices for the Future In-memory Computing

2021 ◽  
Author(s):  
Chun Zhao ◽  
Tianshi Zhao ◽  
Zongjie Shen ◽  
Yixin Cao ◽  
Yina Liu ◽  
...  
Keyword(s):  
Two Dimensional ◽  
The Future

scholarly journals The Challenge of Using Future SWOT Data for Oceanic Field Reconstruction

2016 ◽  
Vol 33 (1) ◽  
pp. 119-126 ◽  
Author(s):  
Lucile Gaultier ◽  
Clément Ubelmann ◽  
Lee-Lueng Fu
Keyword(s):  
High Resolution ◽  
General Circulation ◽  
Circulation Model ◽  
Ocean General Circulation Model ◽  
Two Dimensional ◽  
Satellite Mission ◽  
The Future ◽  
Resolution Model ◽  
Mapping Techniques ◽  
Ocean Topography

AbstractConventional altimetry measures a one-dimensional profile of sea surface height (SSH) along the satellite track. Two-dimensional SSH can be reconstructed using mapping techniques; however, the spatial resolution is quite coarse even when data from several altimeters are analyzed. A new satellite mission based on radar interferometry is scheduled to be launched in 2020. This mission, called Surface Water and Ocean Topography (SWOT), will measure SSH at high resolution along a wide swath, thus providing two-dimensional images of the ocean surface topography. This new capability will provide a large amount of data even though they are contaminated with instrument noise and geophysical errors. This paper presents a tool that simulates synthetic observations of SSH from the future SWOT mission using SSH from any ocean general circulation model (OGCM). SWOT-like data have been generated from a high-resolution model and analyzed to investigate the sampling and accuracy characteristics of the future SWOT data. This tool will help explore new ideas and methods for optimizing the retrieval of information from future SWOT missions.

Die Brücke [The Bridge]

2018 ◽  
Author(s):  
Dagmar Grimm
Keyword(s):  
Twentieth Century ◽  
Two Dimensional ◽  
Technical Institute ◽  
New Era ◽  
Dimensional Effect ◽  
The Future ◽  
Leave Of Absence ◽  
German Art ◽  
The Times

Convinced that art should be an expression of life representing the vitality of the times, four architecture students in Dresden joined together to found Die Brücke [The Bridge] in 1905. The name, suggested by one of their founding members, Karl Schmidt-Rottluff, reflected their intention to provide a bridge between the art of previous generations and that of the new era of the twentieth century. As the initiator of Die Brücke and its chief spokesman, Ernst Ludwig Kirchner had the audacious idea of renewing German art. He was joined by Fritz Bleyl, Erich Heckel, and Karl Schmidt-Rottluff, fellow students studying at Dresden’s Technische Hochschule [Dresden Technical Institute]. In preceding years, both Kirchner, who had taken leave of absence to study art, and Bleyl had been working on woodcuts influenced heavily by the earlier Jugendstil. While Bleyl remained interested in the illusion of space, Kirchner had begun to simplify his style to include greater planarity, with jagged lines providing delineation and contour, creating a two-dimensional effect that was already indicative of his signature stylistic innovations of the future.

scholarly journals Some Uses of Spectral Classification in HR Diagrams

1978 ◽  
Vol 80 ◽  
pp. 3-4
Author(s):  
W.W. Morgan
Keyword(s):  
Class Diagram ◽  
Two Dimensional ◽  
Spectral Classification ◽  
Luminosity Class ◽  
Local Perturbations ◽  
The Future ◽  
Continuity Of The Spectrum ◽  
Unlimited Variety ◽  
Morphological System ◽  
Hr Diagram

The MK spectrum-luminosity class diagram (S-LC diagram) between types 09 and G0 is a two-dimensional array containing approximately 100–150 information elements; each information element is a single cell denoted by a spectral type and a luminosity class. These individual, non-dimensional cells (i.e. AO III) can be considered as carriers of observational information toward the HR diagram. Some categories of peculiar spectra (for example, spectra resembling that of the “silicon star” θ Aur) can be attached to certain cells, and can be considered as local perturbations upon the underlying continuity of the spectrum-luminosity class sequences. By such a procedure, the S-LC diagram cells can be considered open-ended, in that progressive additions to the cells can be made indefinitely into the future. Such a procedure can incorporate successfully an unlimited variety of “normal” and “peculiar” categories of spectra - both those already known and those still to be discovered. A morphological system that is unitary thus comes into existence - a system of considerable astrophysical interest. The translation of the detailed language of this system into that of the classical HR diagram is a task for the future.

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