Développement et usage d'un système expert pour le choix des évacuateurs de crues

Expert systems are computer tools allowing the management of nonnumerical, qualitative knowledge. In that way, they depart from the numerical tools used for solving complex equation systems in computer assisted design. The integration of both types of tools is therefore desirable. Typically, the design of spillways involves long and tedious calculations, dependant on the type and nature of the structure. An expert system was developed to assist the design engineer in the initial and crucial task of choosing the baseline conditions. This expert system is based solely on technical criterion and integrates the knowledge of several experts in the field. A management tool for this multiple-source knowledge was therefore developed and integrated to the many design criterions. The system, currently being developed and implemented in an industry, was tested against approximately 40 worldwide existing structures. The responses, very promising, are presented with the system structure and its technical content. Key words: expert system, design, spillway, hydraulics.

Download Full-text

SEXTANG : système expert d'aide à l'exploitation des stations d'épuration par étangs aérés facultatifs

Canadian Journal of Civil Engineering ◽

10.1139/l93-064 ◽

1993 ◽

Vol 20 (3) ◽

pp. 500-508

Author(s):

J. Gagnon ◽

J. B. Sérodes ◽

G. Simian

Keyword(s):

Wastewater Treatment ◽

Expert System ◽

Key Words ◽

Municipal Wastewater ◽

Environmental Regulations ◽

Computer Assisted ◽

System A ◽

Système Expert ◽

Data Record ◽

User Friendly

When completed, the actual program of municipal wastewater abatment of Quebec will comprise, among many treatment stations, approximately 400 facultative aerated lagoons. This type of station needs some supervision to maintain a good performance. Failure to adequately supervise the process could result in partly treated waters, not meeting environmental regulations, being released, SEXTANG is a prototype of expert system developed to assist operators of these stations in their every day duties and to identify the causes of misfunctions and propose solutions. Four different functions are available: (i) diagnosis and solutions to identified problems, (ii) data record and processing of current parameters, (iii) sludge management, and (iv) information on environmental regulations, SEXTANG presents also a user friendly interface with functions like an explanation of questions asked by the system, a dictionary of wastewater treatment terminology, and the access, at any time during a consultation, to the values and answers given by the operator since the beginning of the consultation. Key words: expert system, wastewater treatment, facultative aerated lagoons, computer-assisted operation.

Download Full-text

Divisions of labor in computer-assisted design

10.3115/1599773.1599805 ◽

1997 ◽

Author(s):

Reed Stevens

Keyword(s):

Computer Assisted ◽

Computer Assisted Design

Download Full-text

Computational Approaches for the Design of Mosquito Repellent Chemicals

Current Medicinal Chemistry ◽

10.2174/0929867325666181029165413 ◽

2020 ◽

Vol 27 (1) ◽

pp. 32-41 ◽

Cited By ~ 1

Author(s):

Subhash C. Basak ◽

Apurba K. Bhattacharjee

Keyword(s):

Computational Design ◽

Quantitative Structure Activity Relationship ◽

Computer Assisted ◽

Quantitative Structure ◽

Mosquito Repellent ◽

Computational Approaches ◽

Qsar Studies ◽

Computer Assisted Design ◽

Structure Activity ◽

Mosquito Repellents

Background: In view of many current mosquito-borne diseases there is a need for the design of novel repellents. Objective: The objective of this article is to review the results of the researches carried out by the authors in the computer-assisted design of novel mosquito repellents. Methods: Two methods in the computational design of repellents have been discussed: a) Quantitative Structure Activity Relationship (QSAR) studies from a set of repellents structurally related to DEET using computed mathematical descriptors, and b) Pharmacophore based modeling for design and discovery of novel repellent compounds including virtual screening of compound databases and synthesis of novel analogues. Results: Effective QSARs could be developed using mathematical structural descriptors. The pharmacophore based method is an effective tool for the discovery of new repellent molecules. Conclusion: Results reviewed in this article show that both QSAR and pharmacophore based methods can be used to design novel repellent molecules.

Download Full-text

Challenges in Bridge Health Monitoring: A Review

Sensors ◽

10.3390/s21134336 ◽

2021 ◽

Vol 21 (13) ◽

pp. 4336

Author(s):

Piervincenzo Rizzo ◽

Alireza Enshaeian

Keyword(s):

United States ◽

Health Monitoring ◽

Highway Bridges ◽

The United States ◽

Anomalous Behavior ◽

Existing Structures ◽

Bridge Health Monitoring ◽

Using Data ◽

The Many ◽

Major Factors

Bridge health monitoring is increasingly relevant for the maintenance of existing structures or new structures with innovative concepts that require validation of design predictions. In the United States there are more than 600,000 highway bridges. Nearly half of them (46.4%) are rated as fair while about 1 out of 13 (7.6%) is rated in poor condition. As such, the United States is one of those countries in which bridge health monitoring systems are installed in order to complement conventional periodic nondestructive inspections. This paper reviews the challenges associated with bridge health monitoring related to the detection of specific bridge characteristics that may be indicators of anomalous behavior. The methods used to detect loss of stiffness, time-dependent and temperature-dependent deformations, fatigue, corrosion, and scour are discussed. Owing to the extent of the existing scientific literature, this review focuses on systems installed in U.S. bridges over the last 20 years. These are all major factors that contribute to long-term degradation of bridges. Issues related to wireless sensor drifts are discussed as well. The scope of the paper is to help newcomers, practitioners, and researchers at navigating the many methodologies that have been proposed and developed in order to identify damage using data collected from sensors installed in real structures.

Download Full-text

Is computer-assisted design and manufacturing technology useful in the surgical management of trigonocephaly?

Journal of Cranio-Maxillofacial Surgery ◽

10.1016/j.jcms.2021.06.003 ◽

2021 ◽

Author(s):

C.H.A.U.V.E.L.-P.I.C.A.R.D. Julie ◽

B.E.U.R.I.A.T. Pierre-Aurélien ◽

D.A.U.R.A.D.E. Mathieu ◽

S.Z.A.T.H.M.A.R.I. Alexandru ◽

M.O.T.T.O.L.E.S.E. Carmine ◽

...

Keyword(s):

Surgical Management ◽

Manufacturing Technology ◽

Computer Assisted ◽

Computer Assisted Design ◽

Design And Manufacturing

Download Full-text

Current Developments and Best Practice in Open and Distance Learning

The International Review of Research in Open and Distributed Learning ◽

10.19173/irrodl.v1i1.7 ◽

2000 ◽

Vol 1 (1) ◽

Cited By ~ 1

Author(s):

Armando Rocha Trinidade ◽

Hermano Carmo ◽

José Bidarra

Keyword(s):

Learning Strategies ◽

Best Practice ◽

Intrinsic Value ◽

Good Practice ◽

Poor Quality ◽

Technical Content ◽

Support Mechanisms ◽

The Many ◽

Absolute Concept ◽

Near Future

Through the many documents regularly emitted by those dedicated to this activity, it is comparatively easy to describe factual developments in the field of open and distance education in different places in the world. However, it is much more difficult to produce judgements of value about their quality. Quality is a subjective rather than an absolute concept and may be examined from different analytical perspectives: consumers' satisfaction level, intrinsic value of scientific and technical content of learning materials, soundness of learning strategies, efficiency of organisation and procedures, adequate use of advanced technologies, reliability of student support mechanisms, etc. These parameters should be put into the context of specific objectives, nature of target populations and availability of different kinds of resources. In a specific geographic, social, economic and cultural situation a given set of solutions might be judged as adequate and deserving the qualification of "good practice", while in a different context it could be considered of rather poor quality. The selection of examples in this article is the sole responsibility of the authors: neither should the chosen cases be considered as clearly better than any other one, nor missing cases be interpreted as lack of appreciation or a negative judgement. Finally, the authors are aware of the risks of interpreting trends and trying to extrapolate them into the near future: readers should use their own judgement in accepting (or forcefully rejecting) these projections.

Download Full-text