Results 31 to 40 of about 156,630 (288)

Inverse Kinematics of a New Quadruped Robot Control Method

open access: yesInternational Journal of Advanced Robotic Systems, 2013
Design of redudant joints has been widely used in quadruped robots, so new kinds of techniques for sloving inverse kinematics are needed. In this paper we propose a new control method called Time-Pose control method and choose the enhanced extended ...
Cai RunBin   +4 more
doaj   +1 more source

Challenges of inversely estimating Jacobian from metabolomics data

open access: yesFrontiers in Bioengineering and Biotechnology, 2015
Inferring dynamics of metabolic networks directly from metabolomics data provides a promising way to elucidate the underlying mechanisms of biological systems, as reported in our previous studies [1-3] by a differential Jacobian approach. The Jacobian is
Xiaoliang eSun   +4 more
doaj   +1 more source

A Jacobian-based Redundant Control Strategy for the 7-DOF WAM [PDF]

open access: yes, 2002
The mapping between the Cartesian space and joint space of robot manipulators has long been a difficult task for redundant robots. Two main methods are used in the classical approach. One is by using direct kinematic inversion in the position regime; the
Lau, HYK, Wai, LCC
core   +1 more source

Power Flow Calculation Methods for Power Systems with Novel Structure UPFC

open access: yesApplied Sciences, 2020
Latest unified power flow controller (UPFC) projects adopt novel device structures to meet the requirements of practical applications. Developing power flow calculation methods for these new UPFC structures is of great significance for the design and ...
Jian Yang, Zheng Xu
doaj   +1 more source

Radio interferometric gain calibration as a complex optimization problem

open access: yes, 2015
Recent developments in optimization theory have extended some traditional algorithms for least-squares optimization of real-valued functions (Gauss-Newton, Levenberg-Marquardt, etc.) into the domain of complex functions of a complex variable.
Smirnov, Oleg, Tasse, Cyril
core   +2 more sources

Collective Hamiltonians with Kac-Moody Algebraic Conditions [PDF]

open access: yes, 1994
We describe the general framework for constructing collective--theory Hamiltonians whose hermicity requirements imply a Kac--Moody algebra of constraints on the associated Jacobian. We give explicit examples for the algebras $sl(2)_k$ and $sl(3)_k$.
Antal Jevicki   +17 more
core   +2 more sources

Multipoint secant and interpolation methods with nonmonotone line search for solving systems of nonlinear equations

open access: yes, 2017
Multipoint secant and interpolation methods are effective tools for solving systems of nonlinear equations. They use quasi-Newton updates for approximating the Jacobian matrix.
Burdakov, Oleg, Kamandi, Ahmad
core   +1 more source

Short-term voltage stability analysis in power systems: A voltage solvability indicator

open access: yesInternational Journal of Electrical Power & Energy Systems
This paper presents an analytical study for short-term voltage stability based on a novel indicator. First, it is shown that the reduced Jacobian matrix of network equations can be transformed to obtain an approximately symmetric matrix which is usually ...
Wenqing Hao   +4 more
doaj   +1 more source

The Jacobian of a Riemann surface and the geometry of the cut locus of simple closed geodesics

open access: yes, 2017
To any compact Riemann surface of genus g one may assign a principally polarized abelian variety of dimension g, the Jacobian of the Riemann surface. The Jacobian is a complex torus, and a Gram matrix of the lattice of a Jacobian is called a period Gram ...
Muetzel, Bjoern
core   +1 more source

Topology and Material Optimization in Ultra‐Soft Magneto‐Active Structures: Making Advantage of Residual Anisotropies

open access: yesAdvanced Materials, EarlyView.
Residual magnetization induces pronounced mechanical anisotropy in ultra‐soft magnetorheological elastomers, shaping deformation and actuation even without external magnetic fields. This study introduces a computational‐experimental framework integrating magneto‐mechanical coupling into topology optimization for designing soft magnetic actuators with ...
Carlos Perez‐Garcia   +3 more
wiley   +1 more source

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