Graffiti: A Computer-Aided Construction Process Knowledge-Based System

This paper describes EKSPRO, a knowledge-based system integrating a 3-D computer-aided design system for materials, heating, ventilation, lighting equipment, building codes and occupational health regulations, and design guidelines user-defined by architects and engineers. The system features an object-oriented predicate logic knowledge representation, and interfaces with calculation packages (CAD, thermal balance, illumination, daylight).

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Building a knowledge based system for computer aided diagnosis

KES'2000. Fourth International Conference on Knowledge-Based Intelligent Engineering Systems and Allied Technologies. Proceedings (Cat. No.00TH8516) ◽

10.1109/kes.2000.884108 ◽

2002 ◽

Author(s):

L. Torres ◽

C. Frydman

Keyword(s):

Computer Aided Diagnosis ◽

Knowledge Based System ◽

Knowledge Based ◽

Computer Aided ◽

Aided Diagnosis

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A dynamic logistics process knowledge-based system – An RFID multi-agent approach

Knowledge-Based Systems ◽

10.1016/j.knosys.2006.08.004 ◽

2007 ◽

Vol 20 (4) ◽

pp. 357-372 ◽

Cited By ~ 73

Author(s):

Harry K.H. Chow ◽

K.L. Choy ◽

W.B. Lee

Keyword(s):

Process Knowledge ◽

Knowledge Based System ◽

Knowledge Based ◽

Multi Agent ◽

Logistics Process

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Formulasi sistematika knowledge-based engineering untuk penanganan permasalahan proses

Jurnal Teknik Kimia Indonesia ◽

10.5614/jtki.2008.7.1.6 ◽

2018 ◽

Vol 7 (1) ◽

pp. 743

Author(s):

Surahmad W Widodo ◽

Yazid Bindar ◽

P Praharso

Keyword(s):

Equilibrium Model ◽

Cfd Simulation ◽

System Model ◽

Molar Ratio ◽

Synthesis Process ◽

Urea Synthesis ◽

Heuristic Knowledge ◽

Process Knowledge ◽

Knowledge Based System ◽

Knowledge Based

Urea plant is a petrochemical plant considered as one of strategic industries in Indonesia. Knowledge is important asset for the company that should be managed well in order to give the optimal profit. Without the adequate knowledge to operate the process plant, the process problems tend to be solved by trial-error effort in the field with unknown result and can cause the losses for the company. With the knowledge-based system, the knowledge can be stored, organized can be accessed again to solve the process problem and minimize the trial-error losses in this thesis knowledge-based system formulation for process problem solving in urea synthesis process unit done by study the heuristic knowledge, study the urea synthesis equilibrium model, study the urea tray reactor with CFD simulation and study of development of process knowledge-based system model. Urea reaction equilibrium model used can explain the impact of temperature, NH3/C02 molar ratio and H2O/C02 molar ratio to the urea conversion. Calculation results of conversion and reactor outlet composition show the agreement with the reactor data. Results of CFD simulation show that the new configuration of reactor tray give the better mixing effect of liquid and gas phase than the conventional tray. Heuristic knowledge based on the experience and the knowledge based on process model become the knowledge base for development of knowledge-based system model for process problem solving.Keywords: knowledge-based, process knowledge, heuristic, simulation, CFD, urea reactor AbstrakPabrik pupuk adalah pabrik petrokimia yang termasuk salah satu industri strategis nasional. Pengetahuan merupakan aset penting bagi perusahaan yang harus dikelola sebaik-baiknya agar memberikan manfaat dan keuntungan yang optimal. Tanpa pengetahuan yang cukup dalam mengoperasikan pabrik, maka masalah proses yang dihadapi cenderung diselesaikan dengan percobaan di lapangan yang hasilnya tidak pasti dan mengakibatkan kerugian bagi perusahaan. Dengan sistem berbasis pengetahuan, maka pengetahuan disimpan, terorganisasi dan dapat diakses kembali untuk menyelesaian masalah proses, serta tindakan coba-coba yang menghasi/kan kesalahan dapat diminimalkan. Dalam tesis ini formulasi sistem berbasis pengetahuan untuk penanganan permasalahan proses pada unit reaktor sintesis urea dilakukan dengan melakukan kajian pengetahuan heuristis, kajian model kesetimbangan reaksi sintesis urea, kajian simulasi CFD tray reaktor, serta kajian model pengembangan sistem berbasis pengetahuan proses. Model kesetimbangan yang digunakan dapat menjelaskan pengaruh suhu, rasio NH3/CO2 dan rasio H20/C02 terhadap konversi. Hasil perhitungan untuk konversi dan komposisi keluaran reaktor menunjukkan kesesuaian dengan data rancangan pabrik. Hasil kajian simulasi CFD menunjukkan bahwa dengan konjigurasi tray baru dihasilkan efek pencampuran fasa cair dan gas yang lebih baik daripada dengan tray konvensional. Pengetahuan heuristis dari pengalaman dan pengetahuan berdasarkan model proses menjadi basis pengetahuan yang dikembangkan sebagai model sistem berbasis pengetahuan untuk menyelesaikan masalah proses.Kata Kunci: basis pengetahuan, pengetahuan proses, pengetahuan heuristis, simulasi, CFD, reaktor urea

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