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GENERALIZED((□,□)-) SOFT INTERIOR Г-HYPERIDEALS OF Г-SEMIHYPERGROUPS
( M. Y. Abbasi ),( A. Basar ),( A. F. Talee ),( S. A. Khan ) 호남수학회 2018 호남수학학술지 Vol.40 No.1
In this paper, we introduce the notion of (□,□)-soft Г- hyperideals and (□,□)-soft interior Г-hyperideals of Г-semihypergroups by a new approach called soft intersection (briey, S. I.). It is proved that in regular Г-semihypergroups the (□,□)-soft Г-hyperideals and the (□,□)-soft interior Г-hyperideals coincide. Further, we introduce the concept of (□,□)-soft simple Г-semihypergroup and characterize the simple Г-semihypergroups in terms of (□,□)-soft Г-hyperideals and (□,□)-soft interior Г-hyperideals.
GENERALIZED((ξ, ζ)-) SOFT INTERIOR Γ-HYPERIDEALS OF Γ-SEMIHYPERGROUPS
Abbasi, M.Y.,Basar, A.,Talee, A.F.,Khan, S.A. The Honam Mathematical Society 2018 호남수학학술지 Vol.40 No.1
In this paper, we introduce the notion of ($\xi$, ${\zeta}$)-soft ${\Gamma}$-hyperideals and ($\xi$, ${\zeta}$)-soft interior ${\Gamma}$-hyperideals of ${\Gamma}$-semihypergroups by a new approach called soft intersection (briefly, S. I.). It is proved that in regular ${\Gamma}$-semihypergroups the ($\xi$, ${\zeta}$)-soft ${\Gamma}$-hyperideals and the ($\xi$, ${\zeta}$)-soft interior ${\Gamma}$-hyperideals coincide. Further, we introduce the concept of ($\xi$, ${\zeta}$)-soft simple ${\Gamma}$-semihypergroup and characterize the simple ${\Gamma}$-semihypergroups in terms of ($\xi$, ${\zeta}$)-soft ${\Gamma}$-hyperideals and ($\xi$, ${\zeta}$)-soft interior ${\Gamma}$-hyperideals.
이형우 ( Lee Hyunwoo ),염승혁 ( Yeom Seunghyeok ),정형도 ( Jung Hyeongdo ),조혜민 ( Cho Hyemin ),박기웅 ( Park Kiwoong ),박신영 ( Park Shinyoung ),이한얼 ( Lee Hanall ),이태리 ( Lee Talee ),윤희정 ( Yoon Heejeong ),지민제 ( Ji Min 인천대학교 스포츠과학연구소 2021 스포츠科學硏究誌 Vol.34 No.0
본 연구는 서로 다른 목표 힘 수준에 따른 양손 힘 조절 과제 시 힘 조절 능력의 변화 패턴을 시도 내 분석과 시도 간 분석을 통해 평가하고자 하였다. 건강한 성인 11명이 연구에 참여하였으며, 이들은 개인의 최대 자발적 수축의 10% 및 60%의 힘 조절목표를 제시받아 20초 동안 목표 힘 수준에 최대한 머무르는 과제를 실시하였다. 본 연구에서 분석한 시도 내 분석의 변인은 힘의 오차, 가변성, 규칙성, 협응력이고, 시도 간 분석 변인으로는 비제어 다양체 분석을 사용하여 시도 간의 양손 협응력을 평가하였다. 변인의 측정과 분석을 위해 등척성 잡기 힘 조절 장비를 사용하였다. 본 연구의 통계처리는 대응 표본 t-검정을 통해 분석하였으며, 시도 내의 변인과 시도 간 변인의 관계성을 분석하기 위해 피어슨 선형 상관관계 분석을 수행하였다. 연구 결과, 목표 힘 수준이 높아졌을 때 힘의 오차, 가변성 및 규칙성은 증가하였다. 양손 힘 협응력은 반대 위상에서 동일 위상 협응 패턴으로 전환되었고 시도 간 운동 시너지가 감소되었다. 상관 관계분석에서 양측 운동 시너지 와 힘의 오차 및 가변성이 유의한 음의 상관관계가 나타났다. This study aimed to evaluate the pattern of change in the force control capability during bimanual force control task with different targeted force levels through within and between-trial analysis. 11 healthy adults who had no disorders in musculoskeletal and nervous system were recruited to perform bimanual force control task. Subjects measured maximal voluntary contraction(MVC), and perfomed tasks of sustaining at targeted force level at 10% and 60% of individual MVC. Variables in the within a trial analysis were force error, variability, regularity, and coordination. Additionally, our study examined bilateral motor synergies by conducting uncontrolled manifold(UCM) analysis. Isometric grip force control device was used to measure force outputs. The data analysis was performed using the Matlab program (Math Works TM Inc., Natick, USA). For the statistical analysis, the paired t-test and Pearson's linear correlation analysis were performed to analyze the relationship between variables from within and between trials by using SPSS 25.0 for Windows. The findings revealed that force error, variability and regularity was increased when the higher targeted force level was provided. Additionally, bilateral force coordination showed that force exertions between two hands were shifted anti-phase to in-phase force pattern. In the correlation analysis, decreased bilateral motor synergy was significantly related to greater values in force error and variability.
Consensus for Double-Integrator Dynamics with Velocity Constraints
Tales A. Jesus,Luciano C. A. Pimenta,Leonardo A. B. Tôrres,Eduardo M. A. M. Mendes 제어·로봇·시스템학회 2014 International Journal of Control, Automation, and Vol.12 No.5
The problem of consensus for double-integrator dynamics with velocity constraints and a constant group reference velocity is addressed such that: (i) the control law of an agent does not depend on the local neighbors' velocities or accelerations, but only on the neighbors' positions and on the own agent velocity; (ii) the constraints are non-symmetric; (iii) the class of nonlinear functions used to account for the velocity constraints is more general than the ones that are normally considered in the literature. We propose a decentralized control strategy with the neighboring topology described by an undirected interaction graph that is connected. Mathematical guarantees of convergence without violating the constraints are given. A numerical experiment is provided to illustrate the effectiveness of our approach.
An effective locally-defined time marching procedure for structural dynamics
Tales Vieira Sofiste,Delfim Soares Jr,Webe João Mansur 국제구조공학회 2020 Structural Engineering and Mechanics, An Int'l Jou Vol.73 No.1
The present work describes a new time marching procedure for structural dynamics analyses. In this novel technique, time integration parameters are automatically evaluated according to the properties of the model. Such parameters are locally defined, allowing the user to input a numerical dissipation property for each element, which defines the amount of numerical dissipation to be introduced. Since the integration parameters are locally defined as a function of the structural element itself, the time marching technique adapts according to the model, providing enhanced accuracy. The new methodology is based on displacement-velocity relations and no computation of accelerations is required. Furthermore, the method is second order accurate, it has guaranteed stability, it is truly self-starting and it allows highly controllable algorithm dissipation in the higher modes. Numerical results are presented and compared to those provided by the Newmark and the Bathe methods, illustrating the good performance of the new time marching procedure.
SARIKA TALE,T.R.SONTAKKE 한국멀티미디어학회 2011 한국멀티미디어학회 국제학술대회 Vol.2011 No.-
The analysis of heart rate variability (HRV) signal is an important tool for studying the autonomic nervous system, as it allows the evaluation of the balance between the sympathetic and parasympathetic influences on heart rhythm. Time-frequency analysis of HRV makes it easier to evaluate how this balance varies with time. Among the various forms of autonomic disorders, Diabetic Cardiovascular Autonomic Neuropathy (DCAN) is a dreadful complication of diabetes therefore the use of HRV analysis in timely detection of diabetic autonomic neuropathy become of almost significance. This work presents a Electrocardiogram (ECG) signal preprocessing algorithm using Wavelet transform, a Pan-Tompkins algorithm for reliable QRS complex detection and to derive HRV signal from raw ECG signal. A tool for time domain analysis, Frequency domain analysis (Fast Fourier Transform (FFT), Auto-Regressive Model ing) of HRV signal developed in Matlab, Following the guidelines suggested by the Task force of the European Society of Cardiology. ECG data of 10 Diabetes Mellitus (DM) and 10 normal control volunteers were recorded and autonomic nervous system activities are quantified using the developed system. The analysis results shows a lower variation in time-frequency domain parameters of the Diabetics Mellitus (DM) patient group compared to normal subjects and p value <0.01.
Morteza Daneshmand,Mohammad Hossein Saadatzi,Mohammad Hadi Farzaneh Kaloorazi,Mehdi Tale Masouleh,Gholamreza Anbarjafari 대한기계학회 2016 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.30 No.3
This study aims to provide an optimal design for a Spherical parallel manipulator (SPM), namely, the Agile Eye. This aim is approached by investigating kinetostatic performance and workspace and searching for the most promising design. Previously recommended designs are examined to determine whether they provide acceptable kinetostatic performance and workspace. Optimal designs are provided according to different kinetostatic performance indices, especially kinematic sensitivity. The optimization process is launched based on the concept of the genetic algorithm. A single-objective process is implemented in accordance with the guidelines of an evolutionary algorithm called differential evolution. A multi-objective procedure is then provided following the reasoning of the nondominated sorting genetic algorithm-II. This process results in several sets of Pareto points for reconciliation between kinetostatic performance indices and workspace. The concept of numerous kinetostatic performance indices and the results of optimization algorithms are elaborated. The conclusions provide hints on the provided set of designs and their credibility to provide a well-conditioned workspace and acceptable kinetostatic performance for the SPM under study, which can be well extended to other types of SPMs.