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🔍 seiichiro tani 📂 Engineering
Showing 281 results for "seiichiro tani" in Engineering
Engineering Preprint PDF DOI

A 21-24 GHz Low-Phase-Noise mmWave VCO with Third-Harmonic Expansion using a Triple-Coupled Transformer based Tank

Narahari N. Moudhgalya · 2026

This work presents the design and analysis of a sixth-order triple-coupled transformer-based tank, enabling third-harmonic expansion for mmWave VCOs. Unlike conventional fourth-order tanks, the propos…

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Engineering Preprint PDF DOI

Cross-Linguistic Rhythmic and Spectral Feature-Based Analysis of Nyishi and Adi: Two Under-Resourced Languages of Arunachal Pradesh

Deepshikha Gogoi, Parismita Gogoi, Yang Saring · 2026

Under-resourced languages remain underrepresented in quantitative rhythm research,particularly in systematic intra-branch analysis of acoustic differentiation within closely related linguistic groups.…

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Engineering Preprint PDF DOI

Wave Tank Experiment for Sea State Monitoring with Distributed Acoustic Sensing

Yoshiyuki Yajima, Sakiko Mishima, Noriyuki Tonami, Tomoyuki Hino, Shugo Aibe, Junichiro Saikawa, Koji Mizuguchi · 2026

Monitoring sea states across the offshore wind farm areas is essential to keep their structures safe, efficiently operate the systems, and assess the environmental effects of wind turbines. Convention…

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Engineering Preprint PDF DOI

Monitoring exposure-length variations in submarine power cables using distributed fiber-optic sensing

Sakiko Mishima, Yoshiyuki Yajima, Noriyuki Tonami, Tomoyuki Hino, Shugo Aibe, Junichiro Saikawa, Koji Mizuguchi · 2026

This study proposes an anomaly-detection framework for monitoring exposure-length variations in submarine free-span cables using Distributed Acoustic Sensing (DAS), which is one of the distributed fib…

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Engineering Preprint PDF DOI

Deep Learning-Enabled Dissolved Oxygen Sensing in Biofouling Environments for Ocean Monitoring

Nikolaos Salaris, Adrien Desjardins, Manish K. Tiwari · 2026

The escalating climate crisis and ecosystem degradation demand intelligent, low-cost sensors capable of robust, long-term monitoring in real-world environments. Absolute dissolved oxygen (DO) concentr…

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Engineering Preprint PDF DOI

Adaptive Tuning of Online Feedback Optimization for Process Control Applications

Marta Zagorowska, Lukas Ortmann, Giuseppe Belgioioso, Lars Imsland · 2026

Online Feedback Optimization leverages properties of optimization algorithms to develop controllers for systems with limited model availability, which is often the case in process control. The interpl…

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Engineering Preprint PDF DOI

Data-driven Learning of LPV Surrogate Models of Fuel Sloshing

E. Javier Olucha, Valentin Preda, Amritam Das, Roland Toth · 2026

This paper aims to enhance the efficiency of validation and verification campaigns involving fuel sloshing phenomena. Our first contribution is the development of an open-source, high-fidelity and com…

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Engineering Preprint PDF DOI

Robust IMMPC: An Offset-free MPC for Rejecting Unknown Disturbances

Felix Brandle, Frank Allgower · 2026

Output regulation is the problem of finding a control input to asymptotically track reference trajectories and reject disturbances. This can be addressed by using the internal model principle to embed…

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Engineering Preprint PDF DOI

Evaluating Factor-Wise Auxiliary Dynamics Supervision for Latent Structure and Robustness in Simulated Humanoid Locomotion

Chayanin Chamachot · 2026

We evaluate whether factor-wise auxiliary dynamics supervision produces useful latent structure or improved robustness in simulated humanoid locomotion. DynaMITE -- a transformer encoder with a factor…

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Engineering Preprint PDF DOI

Sim-to-reality adaptation for Deep Reinforcement Learning applied to an underwater docking application

Alaaeddine Chaarani, Narcis Palomeras, Pere Ridao · 2026

Deep Reinforcement Learning (DRL) offers a robust alternative to traditional control methods for autonomous underwater docking, particularly in adapting to unpredictable environmental conditions. Howe…

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Engineering Preprint PDF DOI

Swimming Under Constraints: A Safe Reinforcement Learning Framework for Quadrupedal Bio-Inspired Propulsion

Xinyu Cui, Fei Han, Hang Xu, Yongcheng Zeng, Luoyang Sun, Ruizhi Zhang, Jian Zhao, Haifeng Zhang, Weikun Li, Hao Chen, Jun Wang, Dixia Fan · 2026

Bio-inspired aquatic propulsion offers high thrust and maneuverability but is prone to destabilizing forces such as lift fluctuations, which are further amplified by six-degree-of-freedom (6-DoF) flui…

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Engineering Preprint PDF DOI

Wukong-Omni: Design, Modeling and Control of a Multi-mode Robot for Air, Land, and Underwater Exploration with All-in-One Propulsion Unit

Yufan Liu, Rixi Yu, Junjie Li, Yishuai Zeng, Zhenting Wen, Cheng Li, Haifei Zhu, Shikang Lian, Wei Meng, Fumin Zhang · 2026

In flood disaster rescue scenarios, partially submerged buildings prevent aerial robots from accessing lower levels, limiting mission effectiveness. To address this challenge, this paper presents Wuko…

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Engineering Preprint PDF DOI

Observer-Based Estimation and Hydrostatic Inertia Modeling for Cooperative Transport of Variable-Inertia Loads with Quadrotors

Jacob Goodman, Leonardo Colombo, Juan Giribet · 2026

We address load-parameter estimation in cooperative aerial transport with time-varying mass and inertia, as in fluid-carrying payloads. Using an intrinsic manifold model of the multi-quadrotor-load dy…

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Engineering Preprint PDF DOI

Marinarium: a New Arena to Bring Maritime Robotics Closer to Shore

Ignacio Torroba, David Dorner, Victor Nan Fernandez-Ayala, Mart Kartasev, Joris Verhagen, Elias Krantz, Gregorio Marchesini, Carl Ljung, Pedro Roque, Chelsea Sidrane, Linda Van der Spaa, Nicola De Carli, Petter Ogren, Christer Fuglesang, Jana Tumova, Dimos V. Dimarogonas, Ivan Stenius · 2026

This paper presents the Marinarium, a modular and stand-alone underwater research facility designed to provide a realistic testbed for maritime and space-analog robotic experimentation in a resource-e…

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Engineering Preprint PDF DOI

Gradient-Based Adaptive Prediction and Control for Nonlinear Dynamical Systems

Yujing Liu, Xin Zheng, Zhixin Liu, Lei Guo · 2026

This paper investigates gradient-based adaptive prediction and control for nonlinear stochastic dynamical systems under a weak convexity condition on the prediction-based loss. This condition accommod…

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Engineering Preprint PDF DOI

Affordable Data Collection System for UAVs Taxi Vibration Testing

Chaoyi Lin Yang, Gabriele Dessena, Oscar E. Bonilla-Manrique · 2026

Structural vibration testing plays a key role in aerospace engineering for evaluating dynamic behaviour, ensuring reliability and verifying structural integrity. These tests rely on accurate and robus…

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Engineering Preprint PDF DOI

Stochastic Power-Water Coordination: Unlocking Flexibility in Hybrid RO Desalination Plants via Variable-Speed Pumps and Tank Mixing

Rongxing Hu, Charalambos Konstantinou · 2026

Water desalination plants (DPs) are among the most critical infrastructures and largest electricity loads in water-scarce regions worldwide. Although reverse osmosis (RO) desalination is the most ener…

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Engineering Preprint PDF DOI

InsSo3D: Inertial Navigation System and 3D Sonar SLAM for turbid environment inspection

Simon Archieri, Ahmet Cinar, Shu Pan, Jonatan Scharff Willners, Michele Grimaldi, Ignacio Carlucho, Yvan Petillot · 2026

This paper presents InsSo3D, an accurate and efficient method for large-scale 3D Simultaneous Localisation and Mapping (SLAM) using a 3D Sonar and an Inertial Navigation System (INS). Unlike tradition…

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Engineering Preprint PDF DOI

Exact Continuous Reformulations of Logic Constraints in Nonlinear Optimization and Optimal Control Problems

Jad Wehbeh, Eric C. Kerrigan · 2026

Many nonlinear optimal control and optimization problems involve constraints that combine continuous dynamics with discrete logic conditions. Standard approaches typically rely on mixed-integer progra…

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Engineering Preprint PDF DOI

VISO: Robust Underwater Visual-Inertial-Sonar SLAM with Photometric Rendering for Dense 3D Reconstruction

Shu Pan, Simon Archieri, Ahmet Cinar, Jonatan Scharff Willners, Ignacio Carlucho, Yvan Petillot · 2026

Visual challenges in underwater environments significantly hinder the accuracy of vision-based localisation and the high-fidelity dense reconstruction. In this paper, we propose VISO, a robust underwa…

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