Neuron dynamics and synchronous transition of symmetrical electrically coupled Sherman

2021 ◽  
pp. 2150261
Author(s):  
Kaijun Wu ◽  
Tao Li ◽  
Mingjun Yan
Keyword(s):  
Transition Process ◽  
Experimental Results ◽  
Electrical Synapse ◽  
Cluster Synchronization ◽  
Neuron System ◽  
System Synchronization ◽  
Discharge Behavior ◽  
The Rich ◽  
Parameter Values ◽  
Neuron Dynamics

Based on the study of the synchronization of two electric synapse-coupled Sherman neuron systems, this paper analyzes the rich discharge behavior of Sherman neurons through the peak-to-peak interval bifurcation diagram, which determines the parameter values for the study of the electrical synapse coupling Sherman neuron system synchronization. By using the synchronization difference and the correlation coefficient value, this paper analyzes the synchronous transition process of the two electrical synapse-coupled Sherman neuron systems with the change of coupling intensity and studies the bifurcation behavior of neurons in the two electrical synapse-coupled Sherman neuron systems. The experimental results show the transition process of two electrical synapse-coupled Sherman neurons from nonsynchronized, peak-independent cluster synchronization to fully synchronized. In addition, we study the synchronization process of the ring-connected electrical synapse-coupled Sherman neuron system. The experimental results show that the two electrical synapse-coupled Sherman neuron systems show a similar synchronous transition process.

Musical Expression Generation Reflecting User’s Impression by Kansei Space and Fuzzy Rules

2012 ◽  
Vol 16 (2) ◽  
pp. 227-238
Author(s):  
Mio Suzuki ◽  
◽  
Takehisa Onisawa
Keyword(s):  
Fuzzy Inference ◽  
Estimation Procedure ◽  
Experimental Results ◽  
Fuzzy Rules ◽  
Musical Expression ◽  
Image Estimation ◽  
Music Genres ◽  
Parameter Values ◽  
Derivation Procedure

This paper proposes a generation method of musical expression based on a performer’s impression. The musical expression generation method consists of two procedures: image estimation and derivation of parameter values ofmusical expressions. In the image estimation procedure, an adjective, i.e., an image word, is mapped into the Kansei space. In the parameter values derivation procedure, parameter values of musical expression, tempo, volume and length of a note, are obtained by mapping from the Kansei space to the parameters’ space by fuzzy inference. The validity of the proposed method and the influence of music genres on musical expression generation are confirmed by subject experiments. From the experimental results it is found that the proposedmethod successfully generates musical expression reflecting impressions and musical expression in several genres.

scholarly journals Material Characterization for FEM Simulation of Sheet Metal Stamping Processes

2014 ◽  
Vol 6 ◽  
pp. 167147 ◽  
Author(s):  
Alejandro Quesada ◽  
Antonio Gauchia ◽  
Carolina Álvarez-Caldas ◽  
José Luis San Román
Keyword(s):  
Sheet Metal ◽  
Manufacturing Industry ◽  
Fem Simulation ◽  
Main Tool ◽  
Material Model ◽  
Experimental Results ◽  
Simulation Tools ◽  
Sheet Metal Parts ◽  
Simulation Results ◽  
Parameter Values

Sheet metal forming is an important technology in manufacturing, especially in the automotive industry. Today, engineering simulation tools based on the finite elements method are employed regularly in the design of stamping dies for sheet metal parts. However, a bad material model choice or the use of nonaccurate enough parameters can lead to imprecise simulation results. This work uses ANSYS LS-DYNA software to analyze several material models and the influence of their parameter values in FEM simulation results. The main tool to solve these problems is an application designed to assist die stamp designers. The program allows a procedure to be defined to obtain the values of the properties of an unknown material, which combines finite element simulations with real experimental results. Results obtained for the simulation of a real automotive part are analyzed and compared with the real experimental results. Parameters involved in each material model have been identified, and their influence in final results has been quantified. This is very useful to fit material properties in other simulations. This paper fulfils an identified need in the manufacturing industry. In fact, the proposed application is currently being used by a manufacturer of automotive components.

scholarly journals ATOMIC: An Atlas of Machine Commonsense for If-Then Reasoning

2019 ◽  
Vol 33 ◽  
pp. 3027-3035 ◽  
Author(s):  
Maarten Sap ◽  
Ronan Le Bras ◽  
Emily Allaway ◽  
Chandra Bhagavatula ◽  
Nicholas Lourie ◽  
...  
Keyword(s):  
Hierarchical Structure ◽  
Mental States ◽  
Experimental Results ◽  
Commonsense Reasoning ◽  
Neural Models ◽  
Human Evaluation ◽  
Inferential Knowledge ◽  
The Hierarchical Structure ◽  
The Rich

We present ATOMIC, an atlas of everyday commonsense reasoning, organized through 877k textual descriptions of inferential knowledge. Compared to existing resources that center around taxonomic knowledge, ATOMIC focuses on inferential knowledge organized as typed if-then relations with variables (e.g., “if X pays Y a compliment, then Y will likely return the compliment”). We propose nine if-then relation types to distinguish causes vs. effects, agents vs. themes, voluntary vs. involuntary events, and actions vs. mental states. By generatively training on the rich inferential knowledge described in ATOMIC, we show that neural models can acquire simple commonsense capabilities and reason about previously unseen events. Experimental results demonstrate that multitask models that incorporate the hierarchical structure of if-then relation types lead to more accurate inference compared to models trained in isolation, as measured by both automatic and human evaluation.

Systematic study of rapidity dispersion parameter in high energy nucleus–nucleus interactions

2014 ◽  
Vol 23 (03) ◽  
pp. 1450012 ◽  
Author(s):  
Swarnapratim Bhattacharyya ◽  
Maria Haiduc ◽  
Alina Tania Neagu ◽  
Elena Firu
Keyword(s):  
Experimental Data ◽  
Monte Carlo ◽  
Systematic Study ◽  
Nuclear Emulsion ◽  
Quantitative Measure ◽  
High Energy ◽  
Average Multiplicity ◽  
Experimental Results ◽  
Dispersion Parameter ◽  
Parameter Values

A systematic study of rapidity dispersion parameter as a quantitative measure of clustering of particles has been carried out in the interactions of 16 O , 28 Si and 32 S projectiles at 4.5 A GeV/c with heavy ( AgBr ) and light (CNO) groups of targets present in the nuclear emulsion. For all the interactions, the total ensemble of events has been divided into four overlapping multiplicity classes depending on the number of shower particles. For all the interactions and for each multiplicity class, the rapidity dispersion parameter values indicate the occurrence of clusterization during the multiparticle production at Dubna energy. The measured rapidity dispersion parameter values are found to decrease with the increase of average multiplicity for all the interactions. The dependence of rapidity dispersion parameter on the average multiplicity can be successfully described by a relation D(η) = a + b〈ns〉 + c〈ns〉2. The experimental results have been compared with the results obtained from the analysis of Monte Carlo simulated (MC-RAND) events. MC-RAND events show weaker clusterization among the pions in comparison to the experimental data.

Experimental and Theoretical Investigations of a Mechanical Lever System Driven by a DC Motor

2018 ◽  
Vol 28 (02) ◽  
pp. 1850022
Author(s):  
B. Nana ◽  
G. Fautso Kuiate ◽  
S. B. Yamgoué
Keyword(s):  
Magnetic Force ◽  
Nonlinear Behavior ◽  
Dc Motor ◽  
Experimental Results ◽  
Phase Portraits ◽  
Oscillatory Solutions ◽  
Lever System ◽  
Theoretical Investigations ◽  
Theoretical Predictions ◽  
The Rich

This paper presents theoretical and experimental results on the investigation of the dynamics of a nonlinear electromechanical system made of a lever arm actuated by a DC motor and controlled through a repulsive magnetic force. We use the method of harmonic balance to derive oscillatory solutions. Theoretical tools such as, bifurcation diagrams, Lyapunov exponents, phase portraits, are used to unveil the rich nonlinear behavior of the system including chaos and hysteresis. The experimental results are in close accordance with the theoretical predictions.

Transition Process From Contact to Floating State in a Squeeze Air Film

1998 ◽  
Vol 120 (1) ◽  
pp. 60-68 ◽  
Author(s):  
K. Kajiwara ◽  
Y. Harayama ◽  
R. Ueda ◽  
T. Sonoda
Keyword(s):  
Parallel Plate ◽  
Direct Detection ◽  
Transition Process ◽  
Experimental Results ◽  
Experimental Result ◽  
Test Material ◽  
Squeeze Film ◽  
The Time Domain ◽  
Dc Current ◽  
Air Film

This paper presents a series of trials of direct detection of the transition process of a squeeze film, from the contacting state into the floating one. The material was initially placed on the surface of a vibrator constituting a squeeze air film. Three electrical trials were performed to certify whether the material could be elevated after the vibrator was excited. When this is done, clearance is expected between the surfaces of the test material and the vibrator. This may be regarded as the equivalent of a change in electrical resistance from almost zero to infinity, with a kind of parallel-plate capacitor being formed. First, detection through DC current was carried out. The experimental result, however, reveals that the resistance never does become infinite, although the equivalent contacting area calculated from this value is very small. Second, detection through DC voltage was performed by terminating the clearance with parallel resistance. The experimental results verify the appearance of the floating state. Third, the average clearance could be detected by regarding it as a parallel-plate type capacitor. Here a Langevin type piezoelectric transducer was used as the vibrator. Through these experimental results an important fact was observed: the waveform of the voltage applied to the transducer is closely related to the movement of the clearance in the time domain.

Assessment of RQL Trapped Vortex Combustor for Stationary Gas Turbines

2003 ◽  
Author(s):  
Douglas L. Straub ◽  
Kent H. Casleton ◽  
Robie E. Lewis ◽  
Todd G. Sidwell ◽  
Daniel J. Maloney ◽  
...  
Keyword(s):  
Gas Turbines ◽  
Operating Conditions ◽  
Experimental Results ◽  
Reactor Model ◽  
Lean Burn ◽  
Wide Range ◽  
The Rich ◽  
Detailed Kinetics ◽  
Trapped Vortex ◽  
Simple Network

This paper describes the evaluation of an alternative combustion approach to achieve low emissions for a wide range of fuel-types. This approach combines the potential advantages of a staged Rich-burn, Quick-mix, Lean-burn (RQL) combustor with the revolutionary Trapped Vortex Combustor (TVC) concept. Although RQL combustors have been proposed for low-BTU fuels, this paper considers the application of an RQL combustor for high-BTU natural gas applications. This paper will describe the RQL/TVC concept and experimental results conducted at 10 atmospheres (1013 kPa or 147 psia) and an inlet-air temperature of 644K (700°F). The results from a simple network reactor model using detailed kinetics are compared to the experimental observations. Neglecting mixing limitations, the simplified model suggests that NOx and CO performance below 10 parts-per-million could be achieved in an RQL approach. The CO levels predicted by the model are reasonably close to the experimental results over a wide range of operating conditions. The predicted NOx levels are reasonably close for some operating conditions, however, as the rich-stage equivalence ratio increases, the discrepancy between the experiment and the model increases. Mixing limitations are critical in any RQL combustor, and the mixing limitations for this RQL/TVC design are discussed.

Intermediate-coupling structure of odd-A nuclei in the 2s–1d shell

1970 ◽  
Vol 48 (12) ◽  
pp. 1490-1498 ◽  
Author(s):  
B. Castel ◽  
K. W. C. Stewart ◽  
M. Harvey
Keyword(s):  
Coupling Model ◽  
Experimental Results ◽  
Energy Spectra ◽  
Positive Parity ◽  
Intermediate Coupling ◽  
Coupling Structure ◽  
Calculated Energy ◽  
Intermediate Coupling Model ◽  
Parameter Values

The positive parity energy spectra of 29Si, 31P, and 35Cl are calculated in terms of a modified intermediate-coupling model. The vibrating cores are assumed to be 28Si, 32S, and 36Ar respectively, with the 1d3/2, 2s1/2, and 1d5/2 orbits available to particle and hole states. Account is taken of the anharmonicity of the two-phonon core states. The calculated energy spectra and decay schemes are in agreement with recent experimental results with parameter values consistent with previous studies in the s–d shell.

scholarly journals Study on the Optimization of Double Parameters of the Air Flow Resistance and the Permeability of Electrospun Nanofiber Nonwovens

2019 ◽  
pp. 1-12
Author(s):  
Ying Chen ◽  
Yong Liu ◽  
Lu Qi ◽  
Lei Zhang ◽  
Qinwei Fan ◽  
...  
Keyword(s):  
Neural Network ◽  
Flow Resistance ◽  
Orthogonal Experiment ◽  
Air Flow ◽  
Experimental Results ◽  
Electrospun Nanofiber ◽  
Factors Affecting ◽  
Optimization Function ◽  
Major Factors ◽  
Parameter Values

In this paper, neural network is used as the tool to study the factors affecting the air flow resistance and the permeability of electrospun nanofiber nonwovens and analyze the major factors affecting the air flow resistance and the permeability such as concentration, distance, voltage and solution filling speed. First, design a five-level orthogonal table for all factors in accordance with the orthogonal experiment theory, select the corresponding parameter values, use polyvinyl alcohol (PVA) to prepare 50 samples on DXES-01 automatic electrostatic spinning machine, train them with neural network model and obtain the precise fitting function. The optimization function is constructed by the idea of two- objective optimization, and its three relative optimal values are calculated, 8.135611, 8.134624, 8.115814. Compared with the experimental results, the average relative error is 12.89 and 8.34. The experimental results show that the error is also ideal.

scholarly journals DESAIN PARAMETRIK PADA PERANCANGAN DESAIN STUDI BENTUK BANGUNAN BERTINGKAT BANYAK

NALARs ◽  
2019 ◽  
Vol 18 (2) ◽  
pp. 153
Author(s):  
Hendro Trieddiantoro Putro ◽  
Luhur Sapto Pamungkas
Keyword(s):  
Parametric Design ◽  
Design Method ◽  
Design Methods ◽  
Design Tool ◽  
Experimental Results ◽  
Design Parameters ◽  
Processing Parameter ◽  
Ground Floor ◽  
Parameter Values ◽  
Story Building

ABSTRAK. Melalui penelitian ini, peneliti menggunakan metode Desain Parametrik untuk studi bentuk bangunan bertingkat banyak. Rhinoceros dan Grasshopper digunakan sebagai alat studi bentuk bangunan bertingkat banyak. Desain parametrik dilakukan dengan parameter, yaitu berupa bentuk lantai dasar, jumlah lantai, ketebalan lantai, jarak antar lantai, derajat putar, dan olah bentuk. Eksperimen ditunjukkan dengan jumlah alternatif yang dihasilkan dari mengolah nilai parameter. Tujuan penelitian ini adalah mendapatkan gambaran proses mendesain bangunan berlantai banyak menggunakan metode desain parametrik. Hasil penelitian menunjukkan kreativitas dalam mengolah bentuk dasar menjadi bentuk bangunan bertingkat banyak.Kata kunci: Desain Parametrik, Software Rhinoceros dan Grasshopper, Bangunan Bertingkat Banyak ABSTRACT. The researcher has used the Parametric Design method to do form studies of a multi-story building. The Rhinoceros and Grasshopper software have been used as a design tool.  Design parameters were ground floor shapes, number of floors, the thickness of the story, the distance between levels, degree of rotation, and graph mapper. The experimental results are indicated by the number of alternatives generated from processing parameter values. The purpose of this study is to get a description of the process of designing many-story buildings using parametric design methods. The results of the study showed that creativity in processing basic forms into multi-story buildings. Keywords: Parametric Design, Rhinoceros and Grasshopper Software, Multi-storey Buildings

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