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On the Absolute Quadratic Complex and Its Application to Autocalibration [PDF]

2005 IEEE Computer Society Conference on Computer Vision and Pattern Recognition (CVPR'05), 2005
This article introduces the absolute quadratic complex formed by all lines that intersect the absolute conic. If ω denotes the 3 × 3 symmetric matrix representing the image of that conic under the action of a camera with projection matrix P, it is shown that ω ≈ P~Ω_P~T where V is the 3 × 6 line projection matrix associated with P and Ω_ is a 6 × 6 ...
Ponce, Jean, Mc Henry, Kenton, Papadopoulo, Théodore, Teillaud, Monique, Triggs, Bill   +4 more
core   +5 more sources

Optimal tracking control in photovoltaic using linear quadratic tracking

Journal of Aceh Physics Society, 2022
Abstrak. Penelitian ini membahas tentang masalah penjejak pasif photovoltaic terhadap posisi matahari secara optimal. Penjejak pasif digunakan ketika penjejak aktif tidak berfungsi.
Mohd Iqbal Muttaqin, Said Munzir, Marwan Ramli, Muhammad Ikhwan   +3 more
doaj   +3 more sources

Adaptive Control for Finite-Time Cluster Synchronization of Fractional-Order Fully Complex-Valued Dynamical Networks

Fractal and Fractional, 2023
This paper aims to address finite-time cluster synchronization (FTCS) issues for fractional-order fully complex-valued dynamical networks (FFCVDNs) with time delay.
Kaiquan Xiang, Qiaokun Kang, Hao Chang, Jing Yang   +3 more
doaj   +2 more sources

A Vibration Isolation System Using the Negative Stiffness Corrector Formed by Cam-Roller Mechanisms with Quadratic Polynomial Trajectory

Applied Sciences, 2020
The vibration isolator equipped with a negative stiffness corrector (NSC) excels at vibration isolation, but its stiffness often presents complex nonlinearity which needs to be approximated in calculation.
Mengnan Sun, Zhixu Dong, Guiqiu Song, Xingwei Sun, Weijun Liu   +4 more
doaj   +2 more sources

Synchronization in Finite-Time of Delayed Fractional-Order Fully Complex-Valued Dynamical Networks via Non-Separation Method

Entropy, 2022
The finite-time synchronization (FNTS) problem for a class of delayed fractional-order fully complex-valued dynamic networks (FFCDNs) with internal delay and non-delayed and delayed couplings is studied by directly constructing Lyapunov functions instead
Qiaokun Kang, Qingxi Yang, Jing Yang, Qintao Gan, Ruihong Li   +4 more
doaj   +2 more sources

Research on obstacle avoidance path planning of UAV in complex environments based on improved Bézier curve

Scientific Reports, 2023
Obstacle avoidance path planning is considered an essential requirement for unmanned aerial vehicle (UAV) to reach its designated mission area and perform its tasks.
Zhihao Zhang, Xiaodong Liu, Boyu Feng
doaj   +2 more sources

Finite-Time Cluster Synchronization of Delayed Fractional-Order Fully Complex-Valued Community Networks

IEEE Access, 2022
This paper focuses on the finite-time (FNT) cluster synchronization issues for a class of delayed fractional-order fully complex-valued community networks (FFCVCNs).
Qiaokun Kang, Qingxi Yang, Zhilong Lin, Qintao Gan   +3 more
doaj   +1 more source

Pore-scale modeling of pore structure properties and wettability effect on permeability of low-rank coal

International Journal of Mining Science and Technology, 2023
Permeability is a key parameter for coalbed methane development. Although the absolute permeability of coal has been extensively studied, wettability and pore structure properties continue to challenge the microscopic description of water-gas flow in ...
Xiangjie Qin, Jianchao Cai, Gang Wang
doaj   +1 more source

Swing up and stabilization control of rotary inverted pendulum based on energy balance, fuzzy logic, and LQR controllers

Measurement + Control, 2021
Rotary Inverted Pendulum (RIP) mimics the behavior of many practical control systems like crane mechanism, segway, unicycle robot, traction control in vehicles, rocket stabilization, and launching.
Muhammad Abdullah, Arslan Ahmed Amin, Sajid Iqbal, Khalid Mahmood-ul-Hasan   +3 more
doaj   +1 more source

Optimal metaheuristic state-dependent parameter proportional-integral-plus control: Alternative to gain-scheduled controller for control of a nonlinear continuous stirred tank reactor

Systems and Soft Computing, 2023
The continuous stirred-tank reactors have complex dynamic behavior. In the reactor, the residual concentration decreases during an exothermic chemical reaction.
Behrouz Kiani Talaei, Farhad Shahraki, Jafar Sadeghi, Mir Mohammad Khalilipour   +3 more
doaj   +1 more source