scholarly journals Experimental study of flexural-torsional deformations and stability of curved elements of steel arches with l-shaped cross-section

2020 ◽  
Vol 17 (1) ◽  
pp. 94-99
Author(s):  
D. V. Urazgildeev ◽  
Keyword(s):  
Experimental Study ◽  
Cross Section ◽  
Theoretical Study ◽  
Experimental Studies ◽  
Limit Loads ◽  
The Core ◽  
Core Elements ◽  
The Stability ◽  
Curved Elements ◽  
Shaped Cross Section

The method and results of experimental studies of flexural and torsional displacements, as well as the stability of curved elements of steel arches with I-shaped cross-section are presented.The author presents graphs of the dependence of flexural-torsional movements on the load for three different loading schemes obtained during the experiment. The limit loads on the core elements of the arches were obtained. The results of the experiment were compared with the theoretical study.

scholarly journals Experimental Study of the Chaotic Jerk Circuit Application for Chaos Shift Keying

2021 ◽  
Vol 58 (4) ◽  
pp. 55-68
Author(s):  
F. Capligins ◽  
A. Litvinenko ◽  
A. Aboltins ◽  
E. Austrums ◽  
A. Rusins ◽  
...  
Keyword(s):  
Experimental Study ◽  
Voltage Drop ◽  
Experimental Studies ◽  
Chaotic Synchronization ◽  
Channel Noise ◽  
Error Feedback ◽  
Shift Keying ◽  
The Stability ◽  
Chaos Shift Keying ◽  
The Impact

Abstract The paper presents a study of the chaotic jerk circuit (CJC) employment capabilities for digital communications. The concept of coherent chaos shift keying (CSK) communication system with controlled error feedback chaotic synchronization is proposed for a specific CJC in two modifications. The stability of chaotic synchronization between the two CJCs was evaluated in terms of voltage drop at the input of the slave circuit and the impact of channel noise using simulations and experimental studies.

Sledge-boats

Polar Record ◽  
1958 ◽  
Vol 9 (58) ◽  
pp. 20-22
Author(s):  
J. A. Exley
Keyword(s):  
Sea Ice ◽  
Cross Section ◽  
Falkland Islands ◽  
Oxford University ◽  
Centre Of Gravity ◽  
Marguerite Bay ◽  
Ice Conditions ◽  
The Stability ◽  
Shaped Cross Section

Unstable sea ice conditions in 1955 and 1956 made it advisable to carry some form of boat during sledge journeys from the Falkland Islands Dependencies Survey (F.I.D.S.) station at Horseshoe Island, in Marguerite Bay, Graham Land. The account given of a sledge-boat in Hints to travellers (Vol. 2, 11th ed., 1938, p. 137) was followed, and a craft similar to that employed by the Oxford University Arctic Expedition of 1935-36 was constructed. When this boat was tested it was found to be unstable. This was due both to the saucer-shaped cross-section and to the fact that the whole load has to be placed on top of the sledge. These disadvantages were overcome by the incorporation into the design of a pair of skis, extended from the sledge outer longitudinal and runner on plywood struts. These widened the bottom of the boat and increased the stability. The new shape was intrinsically more stable, and it was also possible to place cargo in the bottom of the boat, thus lowering the centre of gravity.

Experiments on Wall Panels with One-Sided Board Sheathing for Timber Structures

2017 ◽  
Vol 1144 ◽  
pp. 3-8
Author(s):  
Jiří Celler ◽  
Jakub Dolejs ◽  
Vera Hlavata
Keyword(s):  
Bearing Capacity ◽  
Cross Section ◽  
Timber Structures ◽  
Bearing Material ◽  
Load Bearing Capacity ◽  
Load Bearing ◽  
Glued Laminated Timber ◽  
Wall Panels ◽  
The Stability ◽  
Shaped Cross Section

Timber elements with an I-shaped cross-section are used as supporting elements in wall, ceiling and roof panels of light timber frames. The reinforcement of the panel (I-stud) is provided by means of glued timber composite I-shaped element consisting of a web made of a wood-based desk embedded into flanges of solid or glued laminated timber. The stability of the wall panels is usually ensured by sided board sheathing, which prevents buckling of studs in the plane of the wall or their twist. Walls with one-side board sheathing are used for some types of modern timber structures and their load bearing capacity is determined for situation when one-side sheathing burns down during fire or sheathing is not made of a load-bearing material.

Experimental study of penetration interfaces in the overflow fluid-assisted co-injection molding process

2016 ◽  
Vol 36 (2) ◽  
pp. 139-148 ◽  
Author(s):  
Tangqing Kuang ◽  
Chuncong Yu ◽  
Baiping Xu ◽  
Lih-Sheng Turng
Keyword(s):  
Experimental Study ◽  
Injection Molding ◽  
Cross Section ◽  
High Density Polyethylene ◽  
Flow Direction ◽  
Injection Molding Process ◽  
Molding Process ◽  
The Difference ◽  
The Stability ◽  
Plastic Products

Abstract The fluid-assisted co-injection molding (FACIM) process can be used to produce hollow plastic products with outer and inner layers. It can be divided into two categories: water-assisted co-injection molding (WACIM) and gas-assisted co-injection molding (GACIM). An experimental study of penetration interfaces in overflow FACIM was carried out based on a lab-developed FACIM system. High-density polyethylene and polypropylene were used as the outer layer and inner layer plastics, respectively, in the experiments and the injection sequence was reversible. Six cross-section cavities were investigated in the experiments. The penetration behaviors of water and gas in different sequences and cavities were compared and analyzed. The penetration interfaces were characterized by the residual wall thickness (RWT). The experimental results showed that the RWT of the inner layer in WACIM fluctuated along the flow direction, while that in GACIM was more even. The difference of viscosity between the outer and inner layer melts affected the stability of the interface between them. The penetration sections of the inner layer and the gas were closer to the cavity sections in GACIM, while the penetration sections of the inner layer and the water were closer to the circular forms in WACIM.

scholarly journals India's Claim for Pacifism & Arms Modernization: Changing Postures and Outcomes for Pakistan

2021 ◽  
Vol VI (I) ◽  
pp. 1-11
Author(s):  
Muhammad Umer Hayat ◽  
Alina Zaid ◽  
Farrukh Shahzad
Keyword(s):  
United States ◽  
South Asia ◽  
Prime Minister ◽  
Great Powers ◽  
The Core ◽  
Core Elements ◽  
Different Dimensions ◽  
The Stability ◽  
Relationship Of ◽  
Shed Light

This article highlights the aims under Indian Prime Minister Modi concerning to foreign policy of India since 2014. Moreover, it determines those factors that are working as an impetus along with great powers intentions and motives behind them in playing such geostrategic politics in different dimensions, specifically in the nuclear relationship of India and Pakistan. It will also be summarised the assistance and neutrality of Asian power, United States role in South Asia. This paper evaluates the prospects of escalation and de-escalation furthermore as it will discuss the opacity of No First Use, logic and attempt for eradication. This article critically analyses the changing postures in terms of nuclear motivations, the ideology of the Hindutva effect and the comparison of arms and weapons, which are creating risks of miscalculations and essentially at the core of the stability-instability paradox. An attempt is also made to shed light on the core elements that are formulating under Modi.

Experimental Study of FPCA on its Generalization Performance in Image Classification

2014 ◽  
Vol 496-500 ◽  
pp. 2299-2302
Author(s):  
Ke Wang Huang
Keyword(s):  
Experimental Study ◽  
Feature Extraction ◽  
Sample Size ◽  
Performance Metrics ◽  
Theoretical Study ◽  
Experimental Studies ◽  
Performance Criterion ◽  
Large Sample Size ◽  
Theoretical Conclusion ◽  
Generalization Performance

The theoretical study of FPCA shows that FPCA algorithm has better generalization performance than existing PCA and its extended algorithms. But this theoretic conclusion was not confirmed by existing experimental results because of the problems of evaluation criterion. Introducing the idea of clustering performance criterion of LDA, we proposed a general performance metrics for PCA and performed numbers of experimental studies to compare FPCA with existing PCA and its extended algorithms by using our metrics. We found in the feature extraction of image samples that FPCA really has better generalization performance than existing PCA and its extended algorithms under the condition of large sample size. The results confirmed theoretical conclusion of FPCA and improved relevant experimental study.

Fractionation of polymethylene chains: An electron crystallographic investigation

1986 ◽  
Vol 44 ◽  
pp. 794-795
Author(s):  
Douglas L. Dorset
Keyword(s):  
Cross Section ◽  
Binary Systems ◽  
Linear Chain ◽  
Pure Component ◽  
Organic Substrates ◽  
Crystallographic Investigation ◽  
X Ray Diffraction ◽  
X Ray ◽  
Molecular Sizes ◽  
The Stability

A variety of linear chain materials exist as polydisperse systems which are difficultly purified. The stability of continuous binary solid solutions assume that the Gibbs free energy of the solution is lower than that of either crystal component, a condition which includes such factors as relative molecular sizes and shapes and perhaps the symmetry of the pure component crystal structures.Although extensive studies of n-alkane miscibility have been carried out via powder X-ray diffraction of bulk samples we have begun to examine binary systems as single crystals, taking advantage of the well-known enhanced scattering cross section of matter for electrons and also the favorable projection of a paraffin crystal structure posited by epitaxial crystallization of such samples on organic substrates such as benzoic acid.

Experimental Studies Of Multilayer Glass Structures On Compression, Compression With Bending And Simple Bending

2019 ◽  
pp. 22-30
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Applied Load ◽  
Experimental Studies ◽  
Strength Properties ◽  
Research Topic ◽  
Normative Values ◽  
Laminated Glass ◽  
The Cross ◽  
Experimental Values

The work of multilayer glass structures for central and eccentric compression and bending are considered. The substantiation of the chosen research topic is made. The description and features of laminated glass for the structures investigated, their characteristics are presented. The analysis of the results obtained when testing for compression, compression with bending, simple bending of models of columns, beams, samples of laminated glass was made. Overview of the types and nature of destruction of the models are presented, diagrams of material operation are constructed, average values of the resistance of the cross-sections of samples are obtained, the table of destructive loads is generated. The need for development of a set of rules and guidelines for the design of glass structures, including laminated glass, for bearing elements, as well as standards for testing, rules for assessing the strength, stiffness, crack resistance and methods for determining the strength of control samples is emphasized. It is established that the strength properties of glass depend on the type of applied load and vary widely, and significantly lower than the corresponding normative values of the strength of heat-strengthened glass. The effect of the connecting polymeric material and manufacturing technology of laminated glass on the strength of the structure is also shown. The experimental values of the elastic modulus are different in different directions of the cross section and in the direction perpendicular to the glass layers are two times less than along the glass layers.

What is the Core Elements of Social Innovation?

2019 ◽  
Vol 45 ◽  
pp. 83-109
Author(s):  
SangMi Cho ◽  
JongSerl Chun ◽  
SoYoung An ◽  
JiYeon Jung
Keyword(s):  
Social Innovation ◽  
The Core ◽  
Core Elements
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