Results 151 to 160 of about 1,493,991 (168)

Investigation of Mode 0 Acoustic Noise Reduction of Interior Permanent Magnet Motor with a Principle of Radial Force Sum Flattening

European Conference on Cognitive Ergonomics, 2020
In automotive traction drive, Interior Permanent Magnet (IPM) motors are generally used. In acoustic noise reduction, torque ripple reduction is effective, however, some components still remain.
Leping Wang, Ryo Umeoka, A. Chiba
semanticscholar   +1 more source

Constant regression of permanental statistics on the sum of sample elements

Publicationes Mathematicae Debrecen, 1993
Summary: Let \(n\) and \(m\) be arbitrary positive integers. Let the entries of the matrix (1) \(X=(X_{jk})^ n_{j,k=1}\) be identically and independently distributed random variables with moment of order \(m\). Denote by \(f(t)\) their common characteristic function, i.e., let \[ f(t)=\int^ \infty_{-\infty} e^{itx} dF(x),\quad t \in \mathbb{R ...
openaire   +2 more sources

Lower bounds for Sum and Sum of Products of Read-once Formulas

ACM Transactions on Computation Theory, 2019
We study limitations of polynomials computed by depth-2 circuits built over read-once formulas (ROFs). In particular: • We prove a 2Ω(n) lower bound for the sum of ROFs computing the 2n-variate polynomial in VP defined by Raz and Yehudayoff [21].
RamyaC., RaoB. V. Raghavendra
semanticscholar   +1 more source

Polynomial control design for polynomial systems: A non-iterative sum of squares approach

Transactions of the Institute of Measurement and Control, 2018
This paper proposes a non-iterative state feedback design approach for polynomial systems using polynomial Lyapunov function based on the sum of squares (SOS) decomposition.
M. Rakhshan, N. Vafamand, M. Mardani, M. Khooban, T. Dragičević   +4 more
semanticscholar   +1 more source

Model-Free Current Predictive Control for PMSMs With Ultralocal Model Employing Fixed-Time Observer and Extremum-Seeking Method

IEEE transactions on power electronics
Conventional model predictive current control of permanent magnet synchronous machines (PMSMs) relies heavily on a precise mathematical model, which may be challenging to obtain in certain cases.
Xinpo Lin, Jianxing Liu, Zhuangyu Liu, Yabin Gao, Luca Peretti, Ligang Wu   +5 more
semanticscholar   +1 more source

Error Analysis and Design of Sliding-Mode-Observer-Based Sensorless PMSM Drives Under a Low Sampling Ratio

IEEE transactions on power electronics
Sliding-mode observer (SMO) is widely used to achieve high-performance sensorless control of permanent-magnet-synchronous-motor drives. However, the conventional SMO presents increased position estimation error as the sampling ratio decreases even ...
Haitao Yang, Aoyang Xu, Yongchang Zhang, Xiaofeng Chai   +3 more
semanticscholar   +1 more source

Real τ-Conjecture for Sum-of-Squares: A Unified Approach to Lower Bound and Derandomization

Computer Science Symposium in Russia, 2021
P. Dutta
semanticscholar   +1 more source

Extremal Unicyclic Graphs of the Small Diameter with Respect to Permanental Sum

Pure Mathematics, 2021
openaire   +1 more source

On the Normalized Laplacian Permanental Polynomial of a Graph

Bulletin of the Iranian Mathematical Society, 2019
Xiaogang Liu, Tingzeng Wu
semanticscholar   +1 more source

On some permanental conjectures

, 1994
K. Kopotun
semanticscholar   +1 more source