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Towards machine-checked compiler correctness for higher-order pure functional languages 8th

Towards machine-checked compiler correctness for higher-orde...

8th Workshop on computer science Logic, at the Annual Conference of the European-Association-for-computer-science-Logic (CSL 94)

作者： Lester, D Mintchev, S Functional Programming Group Department of Computer Science Manchester University Oxford Road Manchester M13 9PL United Kingdom

ISBN: (纸本)3540600175

In this paper we show that the critical part of a correctness proof for implementations of higher-order functional languages is amenable to machine-assisted proof. An extended version of the lambda-calculus is considered, and the congruence between its direct and continuation semantics is proved. The proof has been constructed with the help of a generic theorem prover - Isabelle. The major part of the problem lies in establishing the existence of predicates which describe the congruence. This has been solved using Milne's inclusive predicate strategy [5]. The most important intermediate results and the main theorem as derived by Isabelle are quoted in the paper.

关键词： Compiler correctness Congruence proof Denotational semantics Lambda calculus Theorem prover

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Novel Approach of a Smart Medical Mirror System for Medical Applications 5

Novel Approach of a Smart Medical Mirror System for Medical ...

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5th IEEE Middle East and Africa Conference on Biomedical Engineering, MECBME 2020

作者： Halaby, Shady Khoury, George Zeid Daou, Roy Abi Hayek, Ali Boercsoek, Josef Lebanese German University Biomedical Technologies Department Jounieh Lebanon Lebanese German University Biomedical Technologies Department Jounieh Lebanon Lebanese German University Biomedical Technologies Department Jounieh Lebanon University of Kassel Faculty of Electrical Engineering/Computer Science Department of Computer Architecture and System Programming Germany University of Kassel Faculty of Electrical Engineering/Computer Science Department of Computer Architecture and System Programming Germany

ISBN: (纸本)9781728123585

Humans always face problems when it comes to medical check-up due to lack of time or laziness. However, lots of medical problems and fatal illnesses can be detected at earlier stages if the person is subject to continuous check-up. Hence, the idea of the proposed system is to design a tool enabling the measurement of the basic vital signs with the smallest effort possible from the person's side. Thus, this paper proposes a smart medical mirror system that acts as a normal mirror and also delivers the basic vital signs of the user such as the heart rate, SPO2, body temperature, and Body Mass Index (BMI). The system takes five seconds for initialization and starts the measurements and displays the results. The user will not lose time as this check-up can be performed every morning while the person is wearing his clothes and getting ready to start his daily activities. The system was tested by multiple users having different body statuses. The recorded values showed very small differences with the exact ones. At the end, the system was able to meet the user specifications concerning its portability, sensitivity, accuracy and, most importantly, its low cost. © 2020 IEEE.

关键词： Mirrors

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Crosscutting concerns in parallelization by invasive software composition and aspect weaving

Crosscutting concerns in parallelization by invasive softwar...

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39th Annual Hawaii International Conference on System sciences, HICSS'06

作者： Chalabine, Mikhail Kassler, Christoph Programming Environments Laboratory Department of Computer and Information Science Linköping University SE-581 83 Linköping Sweden

ISBN: (纸本)0769525075

We take a step forward towards invasive parallelization of sequential programs, where invasiveness amounts to weaving of parallel code into sequential cores on adaptable composition interfaces. In this paper we suggest a set of seven basic parallelization-specific crosscutting concerns, namely: data distribution, parallelism, synchronization , communication, cross-processor data flow, data dependence restructuring and load balancing. These are necessary for the introduction of complex forms of parallelism. We show them to be highly interdependent and moreover environment specific. We also develop motivating examples for how and where such concerns appear in sequential programs. We then propose a hierarchical concern model comprising basic and compound concerns to which platform specific aspects can be mapped. © 2006 IEEE.

关键词： Software engineering

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The weakest failure detectors to solve certain fundamental problems in distributed computing 04

The weakest failure detectors to solve certain fundamental p...

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Proceedings of the 23rd Annual ACM Symposium on Principles of Distributed Computing

作者： Delporte-Gallet, Carole Hadzilacos, Vassos Fauconnier, Hugues Kouznetsov, Petr Guerraoui, Rachid Toueg, Sam LIAFA Université Paris 7 France Department of Computer Science University of Toronto Canada Distributed Programming Laboratory EPFL Switzerland

ISBN: (纸本)9781581138023

We determine the weakest failure detectors to solve several fundamental problems in distributed message-passing systems, for all environments - i.e., regardless of the number and timing of crashes. The problems that we consider are: implementing an atomic register, solving consensus, solving quittable consensus (a variant of consensus in which processes have the option to decide 'quit' if a failure occurs), and solving non-blocking atomic commit.

关键词： Distributed computer systems

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On-demand content delivery grid

On-demand content delivery grid

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5th International Conference on Information Technology and Applications, ICITA 2008

作者： Luk, Vincent Wing-Hei Chan, Jacky Ng, Kam-Wing Wong, Albert Kai-Sun Department of Electronic and Computer Engineering Hong Kong University of Science and Technology Hong Kong Programming Practices Laboratory Department of Computer Science and Engineering Chinese University of Hong Kong Hong Kong Department of Computer Science and Engineering Chinese University of Hong Kong Hong Kong

ISBN: (纸本)9780980326727

In this paper, we propose an On-Demand Content Delivery Grid system that supplements the traditional content delivery network to deal with problems such as the huge influx of network traffic in a short period of time and the high cost in renting a fixed number of servers. We present its system architecture and describe its implementation in details. An experimental high-definition movie streaming site was setup using our content delivery grid system to demonstrate its capabilities with performance analysis.

关键词： Grid computing

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Hybrid Dipper Throated and Grey Wolf Optimization for Feature Selection Applied to Life Benchmark Datasets

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computers, Materials & Continua 2023年第2期74卷 4531-4545页

作者： Doaa Sami Khafaga El-Sayed M.El-kenawy Faten Khalid Karim Mostafa Abotaleb Abdelhameed Ibrahim Abdelaziz A.Abdelhamid D.L.Elsheweikh Department of Computer Sciences College of Computer and Information SciencesPrincess Nourah bint Abdulrahman UniversityP.O.Box 84428Riyadh11671Saudi Arabia Department of Communications and Electronics Delta Higher Institute of Engineering and TechnologyMansoura35111Egypt Faculty of Artificial Intelligence Delta University for Science and TechnologyMansoura35712Egypt Department of System Programming South Ural State UniversityChelyabinsk454080Russia Computer Engineering and Control Systems Department Faculty of EngineeringMansoura UniversityMansoura35516Egypt Department of Computer Science Faculty of Computer and Information SciencesAin Shams UniversityCairo11566Egypt Department of Computer Science College of Computing and Information TechnologyShaqra University11961Saudi Arabia Department of Computer Science Faculty of Specific EducationMansoura UniversityEgypt

Selecting the most relevant subset of features from a dataset is a vital step in data mining and machine *** feature in a dataset has 2n possible subsets,making it challenging to select the optimum collection of features using typical *** a result,a new metaheuristicsbased feature selection method based on the dipper-throated and grey-wolf optimization(DTO-GW)algorithms has been developed in this *** can result when the selection of features is subject to metaheuristics,which can lead to a wide range of ***,we adopted hybrid optimization in our method of optimizing,which allowed us to better balance exploration and harvesting chores more *** propose utilizing the binary DTO-GW search approach we previously devised for selecting the optimal subset of *** the proposed method,the number of features selected is minimized,while classification accuracy is *** test the proposed method’s performance against eleven other state-of-theart approaches,eight datasets from the UCI repository were used,such as binary grey wolf search(bGWO),binary hybrid grey wolf,and particle swarm optimization(bGWO-PSO),bPSO,binary stochastic fractal search(bSFS),binary whale optimization algorithm(bWOA),binary modified grey wolf optimization(bMGWO),binary multiverse optimization(bMVO),binary bowerbird optimization(bSBO),binary hysteresis optimization(bHy),and binary hysteresis optimization(bHWO).The suggested method is superior 4532 CMC,2023,vol.74,no.2 and successful in handling the problem of feature selection,according to the results of the experiments.

关键词： Metaheuristics dipper throated optimization grey wolf optimization binary optimizer feature selection

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Knowledgesheet: A graphical spreadsheet interface for interactively developing a class of constraint programs 2nd

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2nd International Workshop on Practical Aspects of Declarative Languages, PADL 2000

作者： Gupta, Gopal Akhter, Shameem F. Laboratory for Logic Databases and Advanced Programming Department of Computer Science New Mexico State University Las CrucesNM United States

ISBN: (纸本)3540669922

We introduce a generalization of the spreadsheet paradigm, called Knowledgesheet, for solving a class of constraint satisfaction problems. The traditional spreadsheet paradigm is based on attaching arithmetic expressions to individual cells and then evaluating them;our Knowledgesheet interface instead allows finite domain constraints to be attached to individual cells that are then solved to obtain a solution. This extension provides an easy-to-use interface for solving a large class of constraint satisfaction problems|those whose specification and solution conforms to a 2-dimensional structure, e.g., scheduling problems, timetabling problems, etc. A prototype for the Knowledgesheet has been developed and applied to solve many different types of problems. © Springer-Verlag Berlin Heidelberg 2000.

关键词： Spreadsheets

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A Minimal Graphical User Interface for the Jape Proof Calculator

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Formal Aspects of Computing 1999年第3期11卷 244-271页

作者： Bornat, Richard Sufrin, Bernard Programming Research Group University of Oxford Oxford United Kingdom Department of Computer Science Queen Mary and Westfield College University of London London E1 4NS United Kingdom

GUI design isn't simply a matter of putting a nice front-end on a capable program. It requires thought about the way in which people might be expected to use a system, and investigation of the ways that they actually use it. Jape's GUI has been designed to be as simple as possible, so that it will not get in the way of the business of proof. It is designed to be minimal in the information that it displays and the gestures that it requires from the user. In this paper we introduce and give a rationale for the design of Jape's user interface, then note some of its drawbacks.

关键词： Keywords: GUI proof Proof calculator

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Case study: Simulation of a LAN

Case study: Simulation of a LAN

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Workshop on Software Evolution Through Transformations - Toward Uniform Support Throughout the Software Life-Cycle

作者： Janssens, Dirk Demeyer, Serge Mens, Tom Department of Mathematics and Computer Science Universitaire Instelling Antwerpen Antwerp Belgium Programming Technology Lab Vrije Universiteit Brussel Brussels Belgium

A case study on the simulation of a local area network (LAN) that has been used at Vrije Universiteit Brissel (VUB) and the University of Bern to illustrate evolution of object-oriented programs, is reported. The study is intended to illustrate modeling support for software evolution. The case consists of an initial version of the simulation program and a series of changes in the specification that require it to evolve. The evolution of the program corresponds to a series of four consecutive requirements at the level of the LAN, which must be incorporated into the simulation program.

关键词： computer simulation

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A Generalization of σ-Permutability

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Communications in Mathematics and Statistics 2022年第3期10卷 565-579页

作者： Zhigang Wang Jin Guo Inna N.Safonova Alexander N.Skiba School of Science Hainan UniversityHaikou 570228HainanPeople’s Republic of China Department of Applied Mathematics and Computer Science Belarusian State University220030 MinskBelarus Department of Mathematics and Technologies of Programming Francisk Skorina Gomel State University246019 GomelBelarus

Throughout this paper,all groups are finite and G always denotes a finite group;σis some partition of the set of all primes P.A group G is said to beσ-primary if G is aπ-group for someπ∈σ.Aπ-semiprojector of G[29]is a subgroup H of G such that HN/N is a maximalπ-subgroup of G/N for all normal subgroups N of ***П⊆σ.Then we say thatχ={X_(1),...,X_(t)}is aП-covering subgroup system for a subgroup H in G if all members of the setχareσ-primary subgroups of G and for eachπ∈Пwithπ∩π(H)≠φthere are an index i and aπ-semiprojector U of H such that U≤X_(i).We study the embedding properties of subgroups H of G under the hypothesis that G has aП-covering subgroup systemχsuch that H permutes with X^(x)for all X∈χand x∈*** well-known results are generalized.

关键词： Finite group σ-nilpotent group П-semiprojector П-covering subgroup system σ-subnormal subgroup

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