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control Conference (ICC), 2019 Sixth indian

作者： Anant A. Joshi Maulik C. Bhatt Arpita Sinha Mechanical Engineering Indian Institute of Technology Bombay India Aerospace Engineering Indian Institute of Technology Bombay India Systems and Control Engineering Indian Institute of Technology Bombay India

ISBN: (数字)9781728138602

ISBN: (纸本)9781728138619

This paper addresses the problem of exploring a region using Hilbert's space-filling curve in the presence of obstacles. No prior knowledge of the region being explored is assumed. An online algorithm is proposed which can implement evasive strategies to avoid up to two obstacles placed side by side and successfully explore the entire region. The strategies are specified changing the waypoint array followed by the robot, locally at the hole. The fractal nature of Hilbert's space-filling curve has been exploited in proving the validity of the solution. Extension of algorithm for bigger obstacles is briefly shown.

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Backstepping-Induced Terminal Sliding Mode control with Strict Lyapunov Function

Backstepping-Induced Terminal Sliding Mode Control with Stri...

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control technology and Applications (CCTA),

作者： Lars Watermann Johann Reger Bijnan Bandyopadhyay Control Engineering Group Technische Universität Ilmenau P.O. Box 10056598684 Ilmenau Germany Interdisciplinary Program in Systems and Control Engineering Indian Institute of Technology Bombay Mumbai India

ISBN: (数字)9781728171401

ISBN: (纸本)9781728171418

In this paper a different view on the classical Terminal Sliding Mode (TSM) control is presented. The backstepping procedure is used to synthesize a new TSM-like control law for the second and third order integrator chain. A strict Lyapunov function (LF) for the entire closed loop dynamics is given naturally by design. Further, it is shown, under a certain choice of parameters, that the LF is valid for the classical TSM control law, as well. Finite-time convergence of all states to the origin is proven for both control algorithms using this LF. Finally, the new TSM-like control law is validated in simulations for the third order case.

关键词： Convergence Backstepping Lyapunov methods Sliding mode control Closed loop systems control engineering Manifolds

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Defect engineering approaches for metal oxide semiconductor-based chemiresistive gas sensing

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Coordination Chemistry Reviews 2025年 541卷

作者： Kumar, Amit Mazumder, Julaiba Tahsina Joyen, Kenza Favier, Frédéric Mirzaei, Ali Kim, Jin-Young Kwoka, Monika Bechelany, Mikhael Jha, Ravindra Kumar Kumar, Mahesh Kim, Hyoun Woo Kim, Sang Sub Department of Electrical Engineering Indian Institute of Technology Jodhpur Jodhpur 342030 India Department of Electronics Assam Skill University Assam Mangaldai 784125 India European Institut of Membranes (IEM) – UMR 5635 University of Montpellier ENSCM CNRS Montpellier 34090 France Institut Charles Gerhardt Montpellier (ICGM) – UMR 5253 University of Montpellier ENSCM CNRS Montpellier 34090 France Department of Materials Science and Engineering Shiraz University of Technology Shiraz 715557-13876 Iran Customized manufacturing R&D department Korea Institute of Industrial Technology Gyeonggi-do 15014 South Korea Department of Cybernetics Nanotechnology and Data Processing Faculty of Automatic Control Electronics and Computer Science Silesian University of Technology Akademicka 16 Gliwice 44-100 Poland Functional Materials Group Gulf University for Science and Technology (GUST) Mubarak Al-Abdullah 32093 Kuwait Department of Electronics and Electrical Engineering & Centre for Intelligent Cyber-Physical Systems Indian Institute of Technology Guwahati Guwahati 781039 India Division of Materials Science and Engineering Hanyang University Seoul 04763 South Korea Department of Materials Science and Engineering Inha University Incheon 22212 South Korea

Defect engineering in metal oxides presents a promising approach for tailoring material properties. This strategy enhances gas sorption, catalysis, and control over key physical characteristics such as bandgap, magnetic behavior, and electrical conductivity. Despite its potential, the role of defect engineering in advancing metal oxide semiconductor (MOS) gas-sensing performance remains underexplored. This review introduces defect engineering strategies, emphasizing their applications in gas sensing. Gas sensors play a vital role in environmental monitoring, industrial safety, healthcare, and in improving energy efficiency. The demand for advanced gas sensors has never been more critical, given the need for real-time, accurate, and cost-effective detection of pollutant gases. MOS-based gas sensors are widely used in air quality monitoring, industrial safety, and health diagnostics. Vacancies and defect architectures in MOS have been widely studied for their role in sensing performance, as they fundamentally influence sensor efficiency. The effectiveness of MOS sensors largely depends on the type and concentration of defects. This review introduces vacancies and defects in MOS, followed by an in-depth discussion of defect types, factors influencing defect formation, and their role in charge transport. Additionally, it examines the correlation between elemental chemical properties and defect chemistry. Special attention is given to the defect chemistry of metal oxides, including TiO₂, ZnO, Co₃O₄, ZrO₂, WO₃, and CeO₂. It concludes with an examination of surface engineering methods for defect control to improve gas-sensing capabilities. © 2024

关键词： Chemiresistive gas sensing Defect engineering Metal-oxide semiconductor

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Pedestrian perception-based level-of-service model at signalized intersection crosswalks

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Journal of Modern Transportation 2019年第4期27卷 266-281页

作者： S.Marisamynathan P.Vedagiri Transportation Engineering and Management Department of Civil EngineeringNational Institute of Technology TiruchirappalliTiruchirappalliTamil Nadu 400076India Transportation Systems Engineering Department of Civil EngineeringIndian Institute of Technology BombayMumbai 400076India

Pedestrian level of service(PLOS)is an important measure of performance in the analysis of existing pedestrian crosswalk *** researchers have developed PLOS models based on pedestrian delay,turning vehicle effect,etc.,using the conventional regression ***,these factors may not effectively reflect the pedestrians'perception of safety while crossing the *** conventional regression method has failed to estimate accurate PLOS because of the primary assumption of an arbitrary probability distribution and vagueness in the input ***,PLOS categories in existing studies are based on rigid threshold values and the boundaries that are not well ***,it is an important attempt to develop a PLOS model with respect to pedestrian safety,convenience,and efficiency at signalized *** this purpose,a video-graphic and user perception surveys were conducted at selected nine signalized intersections in Mumbai,*** data such as pedestrian,traffic,and geometric characteristics were extracted,and significant variables were identified using Pearson correlation analysis.A consistent and statistically calibrated PLOS model was developed using fuzzy linear regression *** was categorized into six levels(A–F)based on the predicted user perception score,and threshold values for each level were estimated using the fuzzy c-means clustering *** developed PLOS model and threshold values were validated with the fieldobserved *** performance tests were conducted and the results provided more accurate and reliable *** conclusion,this study provides a feasible alternative to measure pedestrian perception-based level of service at signalized *** developed PLOS model and threshold values would be useful for planning and designing pedestrian facilities and also in evaluating and improving the existing conditions of pedestrian facilities at signalized intersections.

关键词： Pedestrian Signalized intersection Level of service Fuzzy regression Fuzzy c-means

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A Concise Method of Pole Placement to Stabilize the Linear Time Invariant MIMO System

A Concise Method of Pole Placement to Stabilize the Linear T...

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control Conference (ICC), 2019 Sixth indian

作者： Justin Jacob Sreya Das Navin Khaneja Department of Systems and Control Engineering Indian Institute of Technology Bombay Mumbai India Faculty of Systems and Control Engineering Department Indian Institute of Technology Bombay Mumbai India

ISBN: (数字)9781728138602

ISBN: (纸本)9781728138619

Stabilization of linear time-invariant multi-inputmulti-output (LTI-MIMO) systems is presented distinctively and efficiently in this paper. The idea is to decouple the system state matrix depending on different inputs and outputs using the special canonical transformation proposed. Due to the decoupled form of the observer based controller system, it's possible to use separate transformation for observer and controller design. Since the decoupled state matrix resembles the single-input-single-output (SISO) case, the generalized equation for the system is first obtained, and then it's extended to the MIMO system. The computational complexity in getting the controller and observer gain matrix coefficients are further reduced due to the special form of gain matrices taken.

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A semantic notion of secure information-flow 1

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2nd ISEA International Conference on Security and Privacy, ISEA-ISAP 2018

作者： Narendra Kumar, N.V. Shyamasundar, R.K. Centre for Payment Systems IDRBT Hyderabad India Department of Computer Science and Engineering Indian Institute of Technology Bombay Mumbai India

ISBN: (数字)9789811375613

ISBN: (纸本)9789811375606

It is highly desirable to have a safety property characterizing a general notion of secure information flow that succinctly captures the underpinnings of language-based security for general purpose programming languages. Such a notion must necessarily consider both implicit and explicit flows, and the need to provide labeled outputs. The notion must also embed access control and information-flow control considering that the program output is usually a set of multilevel labeled outputs. Finally, it must be based on a notion of security violations, as the latter plays a vital role in compositionality of security properties. The widely used notion of non-interference does not meet many of these criteria, and its use has crippled the progress of secure programming systems and operating systems. A notion of security that takes the desired criteria into account is proposed, and its advantages in comparison with non-interference and other related notions is established. We further relate our notion to the early works of Fenton and Denning to highlight its succinctness in defining language-based security, and also with that of Boudol’s notion of secure information flow as a safety property. An added advantage of our approach compared to Boudol’s approach is that it generalizes to non-deterministic systems and systems with rich constructs such as exceptions etc. © Springer Nature Singapore Pte Ltd. 2019.

关键词： Semantics

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Enhancing customer repurchase prediction: Integrating classification algorithms with RFM analysis for precision and actionable insights

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IIMB Management Review 2025年第2期37卷

作者： Rakesh Verma Devesh Rathor Saurabh Kumar Mayank Mishra Mayank Baranwal Data Science and Analytics Indian Institute of Management Mumbai Maharashtra India Mondelez International Lower Parel Mumbai Maharashtra India Adani Group Mumbai Maharashtra India Tata Consultancy Services Thane Maharashtra India Department of Systems and Control Engineering Indian Institute of Technology Mumbai Maharashtra India

Accurate prediction of customer repurchase behaviour is vital for businesses aiming to boost customer retention. This study introduces an advanced approach that merges classification algorithms with RFM analysis, a widely adopted framework in customer relationship management. The proposed models utilise RFM scores as input features to categorise customers into likely or unlikely repurchasers. The developed models demonstrate strong accuracy (74%) and performance on an online UK retail store dataset, showcasing their efficacy in identifying customers likely to make future purchases. Furthermore, a feature importance analysis identifies key RFM dimensions influencing repurchase behaviour, empowering businesses to tailor targeted marketing strategies.

关键词： Customer repurchase intent RFM analysis Interpretable machine learning Customer segmentation

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Strict Lyapunov functions for consensus under directed connected graphs

Strict Lyapunov functions for consensus under directed conne...

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European control Conference (ECC)

作者： Elena Panteley Antonio Loría Srikant Sukumar Laboratoire des signaux et systèmes CNRS Universit Paris-Saclay CentraleSupelec France Dept. of Systems and Control Engineering Indian Institute of Technology Bombay Mumbai India

ISBN: (数字)9783907144022

ISBN: (纸本)9781728188133

It is known that for consensus of systems interconnected under a general directed graph topology a necessary and sufficient condition for consensus is that there exist at least one rooted spanning tree. In this paper we present an original statement of linear algebra that serves to characterise the spanning-tree condition for directed graphs in terms of a Lyapunov equation involving the graph's Laplacian. Our results apply to the case of systems described by simple first and second order integrators. As a result, we provide strict Lyapunov functions that ensure, via direct constructive proof, global exponential stability of the consensus manifold.

关键词： Eigenvalues and eigenfunctions Lyapunov methods Laplace equations Matrix decomposition Stability criteria Graph theory

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Assessing and Modelling Perceived Safety and Comfort of Women during Ridesharing

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Transportation Research Procedia 2020年 48卷 2852-2869页

作者： Aditi Meshram Pushpa Choudhary Nagendra R Velaga Currently perceiving Masters in Transportation Engineering at University of California Davis. The work was carried out when Meshram was in IIT Bombay India Transportation Systems Engineering Department of Civil Engineering Indian Institute of Technology (IIT) Bombay Powai Mumbai-400 076 India

Ridesharing is one of the effective tools to solve some of the environmental and congestion problems; however, it is not very well used by women in developing countries due to safety and comfort issues. Lack of prior planning of addressing the issues which influence the ridesharing choices of women is one of the main hurdles to the growth of ridesharing practices in developing countries like India. This study is designed to examine the safety and comfort perceptions during ridesharing among women residing in India. A comprehensive questionnaire with six different thematic sections (such as demographic attributes, safety perceptions with different co-riders, the importance given to cost, privacy, etc. and various other situational factors concerning ridesharing for women) is prepared. The data from 293 female respondents are collected through a survey. Factor analysis is performed on the perception variables to find out any underlying correlation; and the results showed a four-factor solution. The factors accounting for safety and comfort perceptions during ridesharing are modelled with an ordered logistic regression approach. The model results suggest that young women due to fear of being victimized and unemployed women due to their less exposure to ridesharing have lesser trust in such facilities. Women feel less safe and comfortable when sharing a ride with unknown males or during night. A focus group discussion is also conducted to validate the results and to obtain in-depth knowledge of safety and comfort issues during ridesharing.

关键词： Ridesharing Women safety Comfort Factor analysis Ordered logistic regression

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Round-robin temporal scheduling of exponentially stabilizing controllers

Round-robin temporal scheduling of exponentially stabilizing...

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Asian control Conference

作者： Chinmay Maheshwari Sukumar Srikant Debasish Chatterjee Department of Mechanical Engineering Indian Institute of Technology Bombay Mumbai India Systems and Control Engineering Indian Institute of Technology Bombay Mumbai India

ISBN: (纸本)9781728102634

We study the behavior of a control-affine nonlinear system under periodic switching of the active control channel. The periodic switching between the control channels is implemented in a round-robin fashion. We claim that if a globally exponentially stabilizing feedback controller is sparsified using the round-robin scheme and the control action to each channel is scaled appropriately, then the resulting system is stabilized. For numerical proof of concept, we illustrate the effect of such sparsification on a linearized model of a coupled inverted pendulum - simple harmonic oscillator system.

关键词： Differential equations Trajectory Standards Switches control design Wireless sensor networks

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