On the possibility of recording and studying human movement activity with seismic sensors of a new type: Advantages and prospects of the single-layer flat-coil-oscillator technology based sensors

A new type of single‑layer transrefleсtor structure based on microstrip reflective antenna array is described. The developed device is a single‑layer printed circuit board on one side of which a system of printed reflectors is located, and on the other is a polarization structure consisting of parallel metal conductors, in contrast to a microstrip reflectarray antenna. The shape and geometrical dimensions of printed reflectors arranged in a rectangular or hexagonal (triangular) pattern are chosen in such a way that they transform a spherical front of an incident vertically polarized electromagnetic wave into a flat front of reflected wave. In the case of irradiation of the developed transreflector with a horizontal polarization wave, the printed structure makes minimal electromagnetic energy loss during its passage. The results of characteristics modeling (including phase curves) of an element of the reflective lattice in the W‑band for different angles of incidence of the wave on the planar structure under study are given. Based on the results obtained, the sizes of the reflective elements of the transreflector, which provide for the correction of the incident wave with the necessary phase discrete, are determined and an electrodynamic model of the transreflector antenna is built. The simulation of the main radiation characteristics of the antenna with the developed single‑layer transreflector was carried out.

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Effect of the Thick-Walled Steel Tubular Joint Stiffness on the Overall Stability of a Single-Layer Latticed Shell

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.501-504.791 ◽

2014 ◽

Vol 501-504 ◽

pp. 791-795

Author(s):

Lan Chen ◽

Bo Yin

Keyword(s):

Great Influence ◽

Joint Stiffness ◽

Single Layer ◽

Steel Tube ◽

Tube Section ◽

Overall Stability ◽

Rectangular Tube ◽

New Type ◽

Tubular Joint ◽

Geometric Nonlinear Analysis

As a new type of joint, the thick-walled steel tubular joint is applied in the single-layer latticed shell to solve the connectivity problem of rectangular tube. In combination with the design of practical project, the effect of the new joint stiffness on the overall stability of a single-layer latticed shell and the value of joint stiffness are studied by ANSYS. Some parameters as the rectangular tube section, the thickness of thick-walled steel tube and connecting plate are taken into account in the process of geometric nonlinear analysis. The results show that joint stiffness has great influence on the overall stability of a single-layer latticed shell and the range of effect gradually increases with the growth of rectangular tube section.

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Early bearing fault diagnosis based on improved SFLA and ELM network

Transactions of the Canadian Society for Mechanical Engineering ◽

10.1139/tcsme-2017-0066 ◽

2018 ◽

Vol 42 (2) ◽

pp. 187-193 ◽

Cited By ~ 1

Author(s):

Jingwen Xu ◽

Yunxuan Zhang ◽

Ziqi Yin

Keyword(s):

Neural Networks ◽

Fault Diagnosis ◽

Single Layer ◽

Shuffled Frog Leaping Algorithm ◽

Bearing Fault ◽

Bearing Fault Diagnosis ◽

Chaotic Mapping ◽

New Type ◽

Shuffled Frog Leaping ◽

Learning Machine

In this paper, an extreme learning machine (ELM) network based on an improved shuffled frog leaping algorithm (CCSFLA) is applied in early bearing fault diagnosis. ELM is a new type of single layer forward network. Although the generalization is stronger compared with traditional neural networks, a random setup of initial parameters increases instability of the network. An improved SFLA based on sinusoidal chaotic mapping with infinite collapses and constriction factors (CCSFLA) is proposed in this paper to optimize the ELM and obtain a CCSFLA–ELM model. Results show that the CCSFLA–ELM model can be used for optimization and that it improved the recognition of early bearing fault diagnosis.

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The structural and functional development of the retina in larval Xenopus

Development ◽

10.1242/dev.33.4.915 ◽

1975 ◽

Vol 33 (4) ◽

pp. 915-940

Author(s):

S. H. Chung ◽

R. Victoria Stirling ◽

R. M. Gaze

Keyword(s):

Ganglion Cells ◽

Single Layer ◽

Plexiform Layer ◽

Distinct Pattern ◽

Inner Plexiform Layer ◽

Retinal Ganglion ◽

Response Characteristics ◽

Functional Development ◽

New Type ◽

Plexiform Layers

The structural transformations of the larval Xenopus retina at successive stages of development, and concomitant changes in response characteristics of retinal ganglion cells, were studied using histological and electrophysiological techniques. The first sign of visually evoked electrical responses appears at about the time when the ganglion cells spread out into a single layer and shortly after the inner and outer plexiform layers become discernible. Initially giving simple ‘on’ responses, the cells progressively change their response characteristics and become ‘event’ units. Subsequently, ‘dimming’ units can be identified. Throughout larval life, response properties of these two types become more distinct from one another and approximate to those found in the adult. So do the arborization patterns of the dendritic trees of the ganglion cells. Two types of branching patterns are identifiable in Golgi preparations. Around metamorphic climax, a new type of ganglion cell appears, coinciding with the emergence of ‘sustained’ units electrophysiologically. After metamorphosis, the retina still grows both in thickness (mainly in the inner plexiform layer) and diameter. The three unit types change such that they come to show pronounced inhibitory effects from the peripheral visual field on the receptive field and each unit type acquires a distinct pattern of endogenous discharge.

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IoT based Testbed for Human Movement Activity Monitoring and Presentation

Proceedings of the 6th International Conference on Information and Communication Technologies for Ageing Well and e-Health ◽

10.5220/0009347800610068 ◽

2020 ◽

Author(s):

Akash Gupta ◽

. Khalid-Al-Naime ◽

. Adnan-Al-Anbuky

Keyword(s):

Human Movement ◽

Activity Monitoring ◽

Movement Activity

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Advances in Application and Research of Suspendome Structures

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.243-249.920 ◽

2011 ◽

Vol 243-249 ◽

pp. 920-928

Author(s):

Kai Rong Shi ◽

Yi Liang Zhang ◽

Long Wang

Keyword(s):

Shell Structure ◽

Single Layer ◽

Structural System ◽

Engineering Applications ◽

Research Status ◽

New Type ◽

Dome Structure ◽

Research Orientations ◽

Cable Dome ◽

Application Prospects

The suspendome structure is a new-type of hybrid prestressed spatial structural system which has been developing on the basis of single-layer latticed shell structure and cable dome structure. The wide application prospects of this type of structure have been presented initially since its emergence around ten years ago. Several representative engineering applications of suspendome structures are introduced, and the research status of this structure at home and abroad is summarized. Moreover, further research orientations of suspendome structures are discussed and prospected.

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Mechanical Behavior of Single-Layer Two-Way Grid Cylindrical Latticed Shell with Out-of-Plane Tension Members

The Open Civil Engineering Journal ◽

10.2174/1874149501408010311 ◽

2014 ◽

Vol 8 (1) ◽

pp. 311-319 ◽

Cited By ~ 1

Author(s):

Zhang Zhonghao ◽

Ma Huihuan ◽

Fujimoto Masumi ◽

Fu Qiang

Keyword(s):

Load Distribution ◽

Single Layer ◽

Distribution Patterns ◽

Stability Behavior ◽

Initial Imperfections ◽

Tension Member ◽

Grid Shell ◽

Out Of Plane ◽

New Type ◽

Tension Members

Single layer two-way grid shell with in-plane and out-of-plane tension members is a new type of single-layer latticed shell roof. This study treats the effects of tension member installation on the buckling load and strength of a single layer two-way grid cylindrical shell roof by the numerical method. The tension members are installed to stiffen the rigidity of a single layer two-way grid shell roof and improve its stability behavior. Tension member installation and placement pattern is focused as both diagonal members of two-way grids and out-of-plane stiffened members in a cylindrical surface. The diagonal member and the out-of-plane member are used to increase the in-plane and the out-of-plane rigidity of a single layer two-way grid shell, respectively. The tension member placement pattern, the load distribution patterns, the initial imperfections and the initial axial force are considered for the numerical calculation parameters. It is confirmed by the numerical analysis that the tension members in out-of-plane and diagonals caused the increase in the buckling and strength of two-way grid shell.

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Theoretical Prediction of the Structural and Electronic Properties of a Single Layer Graphene-like Two-dimensional Janus GaInSTe

VNU Journal of Science Mathematics - Physics ◽

10.25073/2588-1124/vnumap.4408 ◽

2021 ◽

Vol 37 (2) ◽

Author(s):

Nguyen Van Chuong ◽

Nguyen Ngoc Hieu ◽

Nguyen Van Hieu

Keyword(s):

Electric Field ◽

Band Gap ◽

Electronic Properties ◽

Single Layer ◽

Single Layer Graphene ◽

Two Dimensional ◽

Direct Band Gap ◽

Structural And Electronic Properties ◽

Direct Band ◽

New Type

This paper constructs a new type of two-dimensional graphene-like Janus GaInSTe monolayer and systematically investigates its structural and electronic properties as well as the effect of external electric field using first-principles calculations. In the ground state, Janus GaInSTe monolayer is dynamically stable with no imaginary frequencies in its phonon spectrum and possesses a direct band gap semiconductor. The band gap of Janus GaInSTe monolayer can be tuned by applying an electric field, which leads the different transitions from semiconductor to metal, and from indirect to direct band gap. These findings show a great potential application of Janus GaInSTe material for designing next-generation devices.

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