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Formal modelling of list based dynamic memory allocators

Science China(Information Sciences) 2018年第12期61卷 81-96页

作者： Bin FANG Mihaela SIGHIREANU Geguang PU Wen SU Jean-Raymond ABRIAL Mengfei YANG Lei QIAO Shanghai Key Laboratory of Trustworthy Computing East China Normal University IRIF University Paris Diderot and CNRS School of Computer Engineering and Science Shanghai University Marseille Beijing Institute of Control Engineering

Existing implementations of dynamic memory allocators(DMA) employ a large spectrum of policies and techniques. The formal specifications of these techniques are quite complicated in isolation and very complex when combined. Therefore, the formal reasoning on a specific DMA implementation is difficult for automatic tools and mostly single-use. This paper proposes a solution to this problem by providing formal models for a full class of DMA, the class using various kinds of lists to manage the memory blocks controlled by the DMA. To obtain reusable formal models and tractable formal reasoning, we organise these models in a hierarchy ranked by refinement relations. We prove the soundness of models and the refinement relations using the modeling framework Event-B and the theorem prover Rodin. We demonstrate that our hierarchy is a basis for an algorithm theory for list based DMA: it abstracts various existing implementations of DMA and leads to new DMA implementations. The applications of this formalisation include model-based code generation, testing, and static analysis.

关键词： dynamic memory allocators formal methods refinement Event-B Rodin model-based design

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Software for Small-scale Robotics: A Review

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International Journal of Automation and computing 2018年第5期15卷 515-524页

作者： Tobias Tiemerding Sergej Fatikow Department of Computing Science Division Microrobotics and Control Engineering (AMiR) University of Oldenburg OFFIS–Institute for Information Technology R&D Division Automation and Integration Technology (AIT)

In recent years, a large number of relatively advanced and often ready-to-use robotic hardware components and systems have been developed for small-scale use. As these tools are mature, there is now a shift towards advanced applications. These often require automation and demand reliability, efficiency and decisional autonomy. New software tools and algorithms for artificial intelligence（AI） and machine learning（ML） can help here. However, since there are many software-based control approaches for small-scale robotics, it is rather unclear how these can be integrated and which approach may be used as a starting point. Therefore, this paper attempts to shed light on existing approaches with their advantages and disadvantages compared to established requirements. For this purpose, a survey was conducted in the target group. The software categories presented include vendor-provided software, robotic software frameworks（RSF）, scientific software and in-house developed software（IHDS）. Typical representatives for each category are described in detail, including Smar Act precision tool commander, Math Works Matlab and national instruments Lab VIEW, as well as the robot operating system（ROS）. The identified software categories and their representatives are rated for end user satisfaction based on functional and non-functional requirements, recommendations and learning curves. The paper concludes with a recommendation of ROS as a basis for future work.

关键词： Robotic control software engineering micro/nano robotics artificial intelligence （AI） machine learning （ML） open

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Design of Missile Roll Autopilot based on Linear Extended State Observer 34

Design of Missile Roll Autopilot based on Linear Extended St...

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第34届中国控制与决策会议

作者： Xu Xieyu Cui Xiaoxi Yu Wenbo Luo Penghao Gao Mi Norinco Group Institute of Navigation and Control Technology Beijing Aeronautic Technology Research Center Beijing JingHang Research Institute of Computing and Communication

ISBN: (纸本)9781665478977

With the expansion of missile envelope and the improvement of missile combat effect in recent years,the control of missile roll channel is faced with many kinds of unknown disturbances,such as oblique-blowing moment,additional torque at high angle-of-attack periodic interference of spin tail,severe noise and so on,which are very difficult to be modeled or analyzed *** traditional PID roll autopilot cannot keep the command tracking effectively under these *** on the ADRC idea,this paper designs a kind of LESO observer for missile roll channel without changing the original control parameters or structure,which can effectively estimate the disturbance and realize stable tracking of the roll angle command under all kinds of disturbance conditions.

关键词： LESO roll autopilot disturbance estimation and compensation ADRC

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A hierarchical hybrid architecture for mission-oriented robot control 1

A hierarchical hybrid architecture for mission-oriented robo...

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ROBOT 2013: 1st Iberian Robotics Conference

作者： Muñoz, Manuel Munera, Eduardo Blanes, J. Francisco Simó, Jose E Institute of Control Systems and Industrial Computing Polytechnic City of Innovation Polytechnic University of Valencia Spain

ISBN: (纸本)9783319034126

In this work is presented a general architecture for a multi physical agent network system based on the coordination and the behavior management. The system is organised in a hierarchical structure where are distinguished the individual agent actions and the collective ones linked to the whole agent network. Individual actions are also organised in a hybrid layered system that take advantages from reactive and deliberative control. Sensing system is involved as well in the behaviour architecture improving the information acquisition performance. © Springer International Publishing Switzerland 2014

关键词： Embedded systems

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Exploring Dynamics of Open Quantum Systems in Naturally Inaccessible Regimes

arXiv

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arXiv 2025年

作者： Gu, Xu-Ke Tan, Li-Zhou Nori, Franco You, J.Q. Zhejiang Key Laboratory of Micro-Nano Quantum Chips and Quantum Control School of Physics State Key Laboratory for Extreme Photonics and Instrumentation Zhejiang University Hangzhou310027 China Theoretical Quantum Physics Laboratory Cluster for Pioneering Research RIKEN Saitama Wakoshi351-0198 Japan Center for Quantum Computing RIKEN Saitama Wakoshi351-0198 Japan Quantum Research Institute The University of Michigan Ann ArborMI48109-1040 United States College of Optical Science and Engineering Zhejiang University Hangzhou310027 China

Markovian open quantum systems are governed by the Lindblad master equation where the dissipation contains two parts, i.e., the anti-Hermitian operator and the quantum jumps, which share a common dissipation rate. We generalize the Lindblad master equation via postselection to a generalized Liouvillian formalism in which the effective damping rate of the anti-Hermitian operator can be different from the quantum jump rate. Our formalism provides a parameter space with regimes inaccessible in naturally-occurring systems. We explore these new regimes and find several interesting results including negative damping rates and generalized Liouvillian exceptional points. In a previously unexplored zero-damping Liouvillian regime where the damping rate is negligible, we investigate the effect only due to the quantum jumps and show an unusual polynomial decay of the excited state. This generalized Liouvillian formalism offers opportunities to explore novel phenomena and quantum technologies associated with the peculiar behavior of quantum jumps. Copyright © 2025, The Authors. All rights reserved.

关键词： Damping

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Video description with spatial-temporal atention 25

Video description with spatial-temporal atention

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25th ACM International Conference on Multimedia, MM 2017

作者： Tu, Yunbin Zhang, Xishan Liu, Bingtao Yan, Chenggang Institute of Information and Control Hangzhou Dianzi University Hangzhou China Institute of Computing Technology CAS Beijing100190 China

ISBN: (纸本)9781450349062

Temporal attention has been widely used in video description to adaptively focus on important frames. However, most existing methods based on temporal attention suffer from the problems of recognition error and detail missing, because only coarse frame-level global features are employed. Inspired by recent successful work in image description using spatial attention, we propose a spatial-temporal attention (STAT) method to address such problems. In particular, first, we take advantage of object-level local features to address the problem of detail missing. Second, the STAT method further selects relevant local features by spatial attentionand then attend to important frames by temporal attention to recognize related semantics. The proposed two-stage attention mechanism can recognize the salient objects more precisely with high recall and automatically focus on the most relevant spatial-temporal segments given the sentence context. Extensive experiments on two well-known benchmarks suggest that STAT method outperforms the state-of-the-art methods on MSVD with BLEU4 score 0.511, and achieves superior BLEU4 score 0.374 on MSR-VTT-10K. Compared to the method without local features, the relative improvements derived from our STAT method are 10.1% and 0.8% respectively on two benchmarks. Compared to the method using only temporal attention, the relative improvements derived from our STAT method are 18.3% and 9.0% respectively on two benchmarks. © 2017 Association for computing Machinery.

关键词： Semantics

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The propositional normal default logic and the finite/infinite injury priority method

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Science China(Information Sciences) 2017年第9期60卷 99-108页

作者： Wei LI Yuefei SUI Yuhui WANG State Key Laboratory of Software Development Environment Beihang University Key Laboratory of Intelligent Information Processing Institute of Computing TechnologyChinese Academy of Sciences School of Computer and Control Engineering University of Chinese Academy of Sciences

In propositional normal default logic, given a default theory(?, D) and a well-defined ordering of D, there is a method to construct an extension of(?, D) without any injury. To construct a strong extension of(?, D) given a well-defined ordering of D, there may be finite injuries for a default δ∈ D. With approximation deduction ?s in propositional logic, we will show that to construct an extension of(?, D) under a given welldefined ordering of D, there may be infinite injuries for some default δ∈ D.

关键词： default extension strong extension finite/infinite injury priority method recursively enumerable sets

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COMPARISON OF COMPUTATIONAL METHODS FOR SIMULATING NUCLEAR OVERHAUSER EFFECTS IN NMR-SPECTROSCOPY

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JOURNAL OF COMPUTATIONAL CHEMISTRY 1991年第3期12卷 292-300页

作者： FORSTER, MJ Division of Computing and Statistics National Institute for Biological Standards and Control Blanche Lane South Mimms Hertfordshire EN6 3QG United Kingdom

Various algorithms for solving the Solomon equations describing nuclear Overhauser effects (nOes) in NMR spectroscopy have been compared. The applicability of the eigenvalue/eigenvector and the numerical integration approaches have been investigated. The eigenvalue/eigenvector approach is not a computationally efficient means of simulating nOe experiments in which a saturating radiofrequency field is applied during the time course. For experiments in which nOes develop in the absence of an RF field, this approach should only be used in simulating a full NOESY spectrum. Integration schemes have been found to be more efficient at simulating nOe experiments in which the nOe evolves in the presence of a saturating field, at simulating a partial set of initial perturbation experiments and at simulating a few rows or columns in a NOESY spectrum. Various integration schemes were applied to a two-spin system for which an analytic solution is available and to a model B-DNA oligonucleotide hexamer. The previously unused Taylor series algorithm was found to be superior to the Euler, midpoint, and fourth-order Runge-Kutta methods with regard to integration accuracy/computation time. An adaptive step size control routine for the Taylor series integration scheme was developed. Integration schemes can be speeded up in a simple fashion by introducing a distance cutoff for the dipolar interaction. Using a cutoff of 8 angstrom the Taylor series algorithm was able to compute the NOESY spectrum more rapidly than the eigenvalue/eigenvector algorithm for large spin systems at short mixing times. At longer mixing times the eigenvalue/eigenvector approach becomes the more efficient scheme.

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Application driven inverse type constraint satisfaction problems

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Pattern Recognition and Image Analysis 2017年第3期27卷 418-425页

作者： Zhuravlev, Yu. I. Aslanyan, L. Ryazanov, V.V. Sahakyan, H. Dorodnicyn Computing Centre Federal Research Centre "Informatics and Control" of RAS Moscow119333 Russia Institute for Informatics and Automation Problems National Academy of Sciences Yerevan Armenia

Mathematical science in tight integration with the natural and life sciences provide sophisticated models and algorithms of knowledge acquisition. Overall rapid development of nowadays science and technologies is a direct consequence of such interdisciplinary developments. The same time, there exist particular research domains, e.g., the biological research domain, that appears as a semi-exact discipline (except of its genomics part). This is due to insufficient level of readiness of mathematical, physical and chemical sciences, being in power to provide the proper interpretation of the real size biological interrelations. Enrichment of mathematics to this new sophisticated level may be a long lasting but unavoidable process. Current series of studies is driven by a number of applied problems that are focused around the unique integrative technique of getting knowledge from fragmented data and descriptions. A large number of links connect these ideas to the problems of: artificial intelligence, intelligent information management, high performance computation, and other research domains. Our objective is in provision of integrated solutions of inverse type combinatorial problems that will help to sustain a set of applied problems. The base set of applied problems we consider involves the radiation therapy planning, the wireless sensor network integrated-connectivity-coverage protocols with its decentralized management, and the network tomography scenario devoted to the issue of energy minimization in networks. As we will see the necessary mathematical technique of solving these problems is focused around the model description by the sets of constraints and relations, by integration of the partial knowledge about these models. Two scenarios have been considered. One is based on the use of projections and their interpretation, and the second is based on the local neighbourhood analysis (generic projections). Given projections and/or neighbourhoods (in inverse manner),

关键词： Genome

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Robust Model Predictive control for Signal Temporal Logic Synthesis

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IFAC-PapersOnLine 2015年第27期48卷 323-328页

作者： Farahani, Samira S. Raman, Vasumathi Murray, Richard M. Department of Computing and Mathematical Sciences California Institute of Technology PasadenaCA United States Department of Control and Dynamical Systems California Institute of Technology PasadenaCA United States

Most automated systems operate in uncertain or adversarial conditions, and have to be capable of reliably reacting to changes in the environment. The focus of this paper is on automatically synthesizing reactive controllers for cyber-physical systems subject to signal temporal logic (STL) specifications. We build on recent work that encodes STL specifications as mixed integer linear constraints on the variables of a discrete-time model of the system and environment dynamics. To obtain a reactive controller, we present solutions to the worst-case model predictive control (MPC) problem using a suite of mixed integer linear programming techniques. We demonstrate the comparative effectiveness of several existing worst-case MPC techniques, when applied to the problem of control subject to temporal logic specifications; our empirical results emphasize the need to develop specialized solutions for this domain. © 2015, IFAC (International Federation of Automatic control) Hosting by Elsevier Ltd. All rights reserved.

关键词： Temporal logic Automation Computer circuits controllers Embedded systems Hybrid systems Integer programming Logic Synthesis Model predictive control Predictive control systems Robust control Specifications Uncertain systems Comparative effectiveness Discrete time model Environment dynamics Mixed integer linear Mixed integer linear programming techniques Robust model predictive control Robust optimization Temporal logic specifications

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