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Approximation Algorithms for Process Systems Engineering [article]

Dimitrios Letsios, Radu Baltean-Lugojan, Francesco Ceccon, Miten Mistry, Johannes Wiebe, Ruth Misener
2019 arXiv   pre-print
This paper aims to motivate further research at the intersection of approximation algorithms and process systems engineering.  ...  Despite the significant contributions of approximation algorithms in engineering, only limited and isolated works contribute from this perspective in process systems engineering.  ...  We substantiate our claims by offering applications where approximation algorithms can be particularly useful for solving challenging process systems engineering optimization problems.  ... 
arXiv:1909.12328v1 fatcat:tsrrywz63jfalk5xifvpnrqyqu

Ensuring Reliability of Control Data in Engineering Systems

A. Dychko, I. Yeremeyev, V. Kyselov, N. Remez, A. Kniazevych
2019 Latvian Journal of Physics and Technical Sciences  
Algorithms for identifying the states of system have been developed on the basis of theorems of identification.  ...  The paper presents the approach of determination of rationality coefficients of control system, inputted uncertainty, control of the process, system errors, and uncertainty.  ...  CONCLUSIONS The algorithms for identifying the states of the engineering system have been developed on the basis of the theorems of identification.  ... 
doi:10.2478/lpts-2019-0035 fatcat:zearp2cmjjev5ocgcr6r4xgtge

Integrated planning of spare parts and service engineers with partial backlogging

S. Rahimi-Ghahroodi, A. Al Hanbali, W. H. M. Zijm, J. K. W. van Ommeren, A. Sleptchenko
2017 OR spectrum  
When a failure occurs, a spare part and a service engineer are requested for the repair call.  ...  In this paper, we consider the integrated planning of resources in a service maintenance logistics system in which spare parts supply and service engineers deployment are considered simultaneously.  ...  Now, we have an approximation for the coefficient of variation of the arrival process to the service engineers queue.  ... 
doi:10.1007/s00291-017-0473-3 fatcat:wc6xjanvdbdulg54o45howvp4u

Automated tuning of an engine management unit for an automotive engine

C Hardie, H Tait, S Craig, J G Chase, B W Smith, G Harris
2002 Proceedings of the Institution of mechanical engineers. Part D, journal of automobile engineering  
Closed-loop control of an engine dynamometer and EMU, combined with an overall engine tuning algorithm, is used to automate the tuning of the engine map for a four-cylinder engine.  ...  The tuning algorithm determines the air-to-fuel ratio necessary for each region of engine speed and throttle position to obtain the desired performance, automatically moving to each operating region in  ...  The engine tuning algorithm that governs the process is designed to optimize automatically the engine The following sections address the test system and software developed to enable the automated tuning  ... 
doi:10.1177/095440700221600107 fatcat:o54ktlertzg57bzzph5uqaiznq

IMACS: A Framework for Performance Evaluation of Image Approximation in a Closed-loop System

Sajid Mohamed, Sayandip De, Konstantinos Bimpisidis, Vishak Nathan, Dip Goswami, Henk Corporaal, Twan Basten
2019 2019 8th Mediterranean Conference on Embedded Computing (MECO)  
Image approximation has been proposed by recent works for an energy-efficient design of these applications. It also reduces the impact of long processing times.  ...  Image Processing (IP) applications have become popular with the advent of efficient algorithms and low-cost CMOS cameras with high resolution.  ...  IMACS uses V-REP as the physics simulation engine for simulating the plant/system. IMACS currently supports C++ and Matlab codes for SiL and the Nvidia Drive PX2 platform for HiL simulations.  ... 
doi:10.1109/meco.2019.8760055 dblp:conf/meco/MohamedDBNGCB19 fatcat:7zedjm3ekrdqdd7s2z2aolfaoe

MapReduce based Betweenness Approximation Engineering in Large Scale Graph

Xiaolong Deng, Yuxiao Li
2012 Systems Engineering Procedia  
Recently with the rapid increase of information in society activities, distributed information system engineering such as MapReduce based cloud computing distributed system is becoming more and more important  ...  In this article, a novel MapReduce based SNA (Social Network Analysis) system was proposed on layered distributed system.  ...  In this paper, we proposed a novel MapReduce based SNA system on layered distributed system for Betweenness approximation algorithm .It can be used to find most important cellphone users in call graph  ... 
doi:10.1016/j.sepro.2012.04.026 fatcat:y2ledttgy5eblklik2pmar3eza

Engineering Surveying and Mapping System Based on 3D Point Cloud and Registration Communication Algorithm

Liu Qiang, Lin Ling
2022 Wireless Communications and Mobile Computing  
The registration algorithm is applied to the engineering system.  ...  Combined with the improved algorithm, the system framework of the engineering surveying and mapping system is constructed, and the system algorithm is verified by a simulation example.  ...  Combined with the improved algorithm, the system framework of engineering surveying and mapping system is constructed, and the system algorithm is verified by a simulation example.  ... 
doi:10.1155/2022/4579565 doaj:34ca05cee59a4ad99a713620ec479fec fatcat:hyt5mjq2qvhslfyzdwier46v4a

Modified Smith Predictor Based on H 2 and Predictive PI Control Strategy

Shiqing Sang, Pengcheng Nie, Omar-Jacobo Santos
2021 Mathematical Problems in Engineering  
By introducing a time delay term, the modified Smith predictor controller overcomes the shortcoming that the conventional control algorithm can only use the low-order approximation of time delay term to  ...  Simultaneously, the modified Smith predictor controller is applied to conventional process systems based on dynamic optimization estimation in the case study to show absolute superiority over the nonpredictive  ...  For linear systems, we may use the high-order approximation method to deal with the corresponding controller.  ... 
doi:10.1155/2021/7228637 fatcat:3dgp7h6l6rblpbc4ps6jljc7ri

The Importance of Energy Efficiency in Engineering and Informatics

2021 International Journal on Engineering Technologies and Informatics  
Techniques for reducing power consumption in digital circuits that underly automatic control of modern engineering systems are of paramount importance due to the simultaneously growing demands for portable  ...  We review an algorithmic approach to low power frequency-selective digital filtering, an essential ingredient for energy efficient technological innovation in many domains.  ...  A natural extension to variable source coding in signal processing is approximate processing, in which the algorithms for computation are intelligently abbreviated to conserve power instead of the signals  ... 
doi:10.51626/ijeti.2021.02.000012 fatcat:o5q5imrvineapn6qup6374sgem

An Overview of Soft Computing

Dogan Ibrahim
2016 Procedia Computer Science  
Soft computing is based on techniques such as fuzzy logic, genetic algorithms, artificial neural networks, machine learning, and expert systems.  ...  Unlike hard computing, soft computing is tolerant of imprecision, uncertainty, partial truth, and approximations. In effect, the role model for soft computing is the human mind.  ...  A genetic algorithm can be used for finding solutions complex search problems found in engineering applications.  ... 
doi:10.1016/j.procs.2016.09.366 fatcat:szguf3nbdzel7o26tsd7iuwhl4

Optimal Scheduling for an Automated Three-Machine Flowshop Manufacturing System
3機械フローショップ型自動生産システムの最適スケジューリング

Jinliang CHENG, Hiroshi KISE, Hironori MATSUMOTO
1995 Transactions of the Society of Instrument and Control Engineers  
Second, an approximation algorithm that utilizes a fuzzy inference based on a dominance relation for the 4 FSP is proposed.  ...  Third, a branch-andbound (BAB) algorithm that utilizes the fuzzy approximation is proposed.  ...  R.) by the fuzzy search (%) (tAGV=0.3, p, p: mean processing time) Table 2 2 Rate of problem instances solved by branch-and- bound algorithms (%) (tAGV=0.3, p, p: mean processing time) Table 3  ... 
doi:10.9746/sicetr1965.31.658 fatcat:3cwjxmjlnjc5dpxkppahpqvadi

Fast IQ Amplitude Approximation Method for ASIC Digital System

Giao N. Pham, Department of Computing Fundamentals, FPT University, Hanoi, Vietnam, Anh N. Bui, Binh A. Nguyen, Tung V. Nguyen, Hai T. Nguyen
2021 International Journal of Emerging Technology and Advanced Engineering  
So, in this paper, we present a fast approximation method for above problem which takes a small delay but acceptable accuracy for AISC digital system design.  ...  Keywords—ASIC, Digital system design, FFT, DFT, Fast amplitude approximation, Max-Min approximation.  ...  Acknowledgement This work is supported by FPT University, Hanoi, Vietnam; and Hutech Institute of Engineering, Ho Chi Minh City University of Technology (HUTECH), Vietnam.  ... 
doi:10.46338/ijetae0821_03 fatcat:mfc5itt3lzfahbpd5mbnosxaou

Approximate Computing: From Circuits to Applications

Weiqiang Liu, Fabrizio Lombardi, Michael Schulte
2020 Proceedings of the IEEE  
Approximate algorithms and systems have been studied for emerging computing applications, such as deep neural networks (DNNs) and stochastic computation. Design 0018-9219  ...  design processes; various processing and memory architectures have been proposed for supporting approximate computing applications.  ...  It shows that an algorithm-softwarehardware codesign is critical for the design of efficient AI systems using approximate computing. C.  ... 
doi:10.1109/jproc.2020.3033361 fatcat:ydu7l65envhendynfccof3gjri

Database support for concurrent digital mock-up [chapter]

S. Berchtold, H.-P. Kriegel, M. Pötke
1998 Globalization of Manufacturing in the Digital Communications Era of the 21st Century  
This includes methods for representing and indexing CAD files as well as multi-step query processing.  ...  We propose a database architecture for the efficient management of spatial, structural, and thematic engineering data.  ...  For the generation of approximations we employed the voxel-based algorithm described above.  ... 
doi:10.1007/978-0-387-35351-7_40 fatcat:ozgab4zufzenbekrb2znylpr6q

Framework for Multidisciplinary Design Based on Response-Surface Approximations

Stephen M. Batill, Marc A. Stelmack, Richard S. Sellar
1999 Journal of Aircraft  
As a result, the engine rpm can be affected by changes in any of the system design variables. For this reason, the engine rpm was described as a system state.  ...  The next step in the process is the fully approximate system coordination problem.  ... 
doi:10.2514/2.2436 fatcat:nm5exbnftrff7nm6xkid56iree
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