The gray clustering decision of technical risk of large-scale complex construction engineering design

2014 ◽  
Author(s):  
W. Ma
Keyword(s):  
Engineering Design ◽  
Large Scale ◽  
Construction Engineering ◽  
Technical Risk ◽  
Complex Construction

Technical Risk Assessment of Large-Scale Construction Project Based on Triangle Whitening Weight Function

2014 ◽  
Vol 989-994 ◽  
pp. 5294-5299
Author(s):  
Wei Ma
Keyword(s):  
Risk Assessment ◽  
Weight Function ◽  
Large Scale ◽  
Construction Project ◽  
Scale Construction ◽  
Assessment Model ◽  
Grey Theory ◽  
Risk Assessment Model ◽  
Technical Risk

Technical risk assessment model of large-scale construction project has been established by using triangle whitening weight function of grey theory against the problems of technical risk assessment of large-scale construction project. In the end, through example verification, this model is approved to be feasible and have certain value of reference and utilization in similar problems.

A Data-Driven Text Mining and Semantic Network Analysis for Design Information Retrieval

2017 ◽  
Vol 139 (11) ◽  
Author(s):  
Feng Shi ◽  
Liuqing Chen ◽  
Ji Han ◽  
Peter Childs
Keyword(s):  
Information Retrieval ◽  
Network Analysis ◽  
Text Mining ◽  
Engineering Design ◽  
Large Scale ◽  
Semantic Network ◽  
Document Retrieval ◽  
Design Information ◽  
Improve Design ◽  
Correlation Degree

With the advent of the big-data era, massive information stored in electronic and digital forms on the internet become valuable resources for knowledge discovery in engineering design. Traditional document retrieval method based on document indexing focuses on retrieving individual documents related to the query, but is incapable of discovering the various associations between individual knowledge concepts. Ontology-based technologies, which can extract the inherent relationships between concepts by using advanced text mining tools, can be applied to improve design information retrieval in the large-scale unstructured textual data environment. However, few of the public available ontology database stands on a design and engineering perspective to establish the relations between knowledge concepts. This paper develops a “WordNet” focusing on design and engineering associations by integrating the text mining approaches to construct an unsupervised learning ontology network. Subsequent probability and velocity network analysis are applied with different statistical behaviors to evaluate the correlation degree between concepts for design information retrieval. The validation results show that the probability and velocity analysis on our constructed ontology network can help recognize the high related complex design and engineering associations between elements. Finally, an engineering design case study demonstrates the use of our constructed semantic network in real-world project for design relations retrieval.

scholarly journals Views on Differential Management in Safety Supervision of Construction Engineering

2018 ◽  
Vol 2 (2) ◽  
Author(s):  
Song Yinghua
Keyword(s):  
Large Scale ◽  
Rapid Development ◽  
Science And Technology ◽  
Deep Foundation ◽  
Safety Risk ◽  
Construction Engineering ◽  
Engineering Construction ◽  
Engineering Structure ◽  
High Level ◽  
Socialist Market

Given the advances in science and technology, rapid development of socialist market economy and continuous advance of urbanization, it is necessary to enlarge the scale of engineering construction. As the form of engineering structure becomes more complex, large-scale and high-level projects with deep foundation have appeared in engineering construction. For construction engineering, one of its technologies includes solving the difficulties in construction. It is required to deal with the safety risk of construction in time to guarantee safety construction, timely solve the management difficulties and contradictory problems of the project and ensure both the safety of engineering construction and the rationalization of the institution setting of the safety supervision on the project. 

Design of the viaducts for the Line 3 of the Riyadh Metro LRT in Saudi Arabia

2018 ◽  
Author(s):  
Paul-Emile Durand ◽  
Lucas Wise ◽  
Emmanuel Joy ◽  
Alain Rossetto
Keyword(s):  
Saudi Arabia ◽  
Large Scale ◽  
Parametric Design ◽  
Full Range ◽  
Design Approach ◽  
Construction Site ◽  
Box Girder ◽  
Construction Engineering ◽  
Long Span ◽  
Metro Project

<p>In June 2013, three consortia were awarded the three construction packages that constitute the whole Riyadh Metro Project in Saudi Arabia for a total of 6 lines and 180 kilometres.</p><p>International Bridge Technologies was in charge, as a subconsultant of Idom, of the complete structural scope of services for the 25.6 km of elevated viaduct that Riyadh Metro Package 2 comprises (Line 3, around 41.6 km, out of which 25.6 km are elevated). This scope consisted of the full range of services from conceptual tender design to final detailed design, including shop drawings production, construction engineering and construction site support.</p><p>The Line 3 elevated viaduct consists of a three-cells precast segmental box-girder with typical simply-supported spans of 37 m and special continuous spans of 50 m. Six long span structures with spans varying from 60 m to 95 m were required for the special crossings over existing interchanges. Typical and continuous spans are erected span-by-span with an overhead truss while long spans are erected in balanced cantilever with cranes on the ground or lifting frames on the deck.</p><p>The present paper is centred on the design of the elevated viaduct and presents the different structures with key features and how they were constructed to permit large scale standardisation and speed of construction. Some key design aspects are developed, in particular the design approach for the 3-cells box-girder as the most effective solution to satisfy the imposed aesthetic criteria. This paper also exposes the design approach adopted to produce a “design-for-demand” by relying as much as practically possible on a realistic modelling of the alignment and by limiting parametric design. This allowed for an optimisation of material quantities.</p>

scholarly journals Profit Sharing Mechanism of Large EPC Project considering the Behavior of Fairness Concern

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Huimin Li ◽  
Lelin Lv ◽  
Xiaowei An ◽  
Guanghua Dong
Keyword(s):  
Large Scale ◽  
Joint Venture ◽  
Simulation Analysis ◽  
Profit Sharing ◽  
Construction Engineering ◽  
Construction Enterprises ◽  
Cost Coefficient ◽  
Research Findings ◽  
Fairness Concern ◽  
Project Optimization

A large-scale engineering procurement and construction (EPC) project is often conducted by a joint venture. Many factors affect the success of cooperation among participating enterprises, such as trust and the degree of effort of both parties. The most important one is a rational profit sharing mechanism. Reasonable profit sharing mechanism concerns whether the advantages of the EPC model can be fully utilized. In this study, the proposed EPC project is undertaken by a joint venture integrating design and construction enterprises. Moreover, the profit sharing problem arises from the project optimization implemented by both parties. The fairness concern behavior of both parties is considered, and the profit sharing model for the EPC project is established on the basis of game theory. The effect of the fairness concern behavior of both parties on the EPC project optimization and its profit sharing is further analyzed by simulation analysis. The research findings show that the project optimization profit and its sharing are related to not only the efforts and cost coefficient but also the fairness concern behavior of both parties. The research results are conducive to the application of the EPC model in the field of construction engineering.

Aerospace Simulation and Human Performance Research

1967 ◽  
Vol 9 (2) ◽  
pp. 149-159 ◽  
Author(s):  
William B. Knowles
Keyword(s):  
Engineering Design ◽  
Systems Engineering ◽  
Large Scale ◽  
Human Performance ◽  
Experiment Planning ◽  
Considerable Potential ◽  
Basic Characteristics ◽  
The Many ◽  
Performance Research

The many large-scale aerospace simulation facilities now available offer considerable potential for the generation of data on human performance that can be used in systems engineering design efforts. To realize this potential requires an understanding of the methodological limitations imposed by the basic characteristics of human performance, the application of efficient organizational techniques, and the development of more efficient techniques of experiment planning, design, and execution.

Engineering Study of an Oil Gellation Technique to Control Spills from Distressed Tankers

1973 ◽  
Vol 1973 (1) ◽  
pp. 247-253
Author(s):  
Arnold M. Goldstein ◽  
Robert M. Koros ◽  
Barry L. Tarmy
Keyword(s):  
Crude Oil ◽  
Engineering Design ◽  
Environmental Protection Agency ◽  
Large Scale ◽  
Organic Liquid ◽  
Mixing Time ◽  
Gel Strength ◽  
Scale Model ◽  
Experimental Unit ◽  
Design Data

ABSTRACT Crude oil gellation is a potentially attractive technique for minimizing or preventing the loss of oil from a distressed tanker by converting the liquid oil into a rigid solid. The procedure involves the chemical reaction of two organic liquid gelling agents dissolved in the oil to form a gelant compound which entraps the oil. The resulting gel would float as a coherent mass if it were extruded from a ship or escape as a result of tanker break-up. This paper presents the results of a program undertaken to demonstrate in situ gellation on a large scale, and to gather engineering design information for this technique. The work was jointly funded in part by the U.S. Environmental Protection Agency. Engineering design data gathered during this study include the effect of mixing energy, mixing time, gellation time and temperature on gel strength. In addition, rheological properties of the gel were examined to relate gel strength to the maximum fluid static head that may be maintained without flow through a certain hull hole. Details of a gellation test with 500 bbl of South Louisiana crude oil will be discussed. The experimental unit was 7′ × 14′ × 30′ high and represented the region between two transverse frames in a wing compartment of a 21,000 dwt tanker. The design criteria for the mixing equipment required for gellation was validated by tracer mixing studies in both the 500 bbl tank and a one-seventh scale model of the larger unit. This work forms the basis for the further efforts on equipment development, selection and evaluation required before this technique can be used in the field.

Cultural Interaction Patterns in the Bronze Age: Ritual Bronze Artifacts from Korea and Japan

2019 ◽  
Vol 47 (3) ◽  
pp. 68-73
Author(s):  
A. L. Nesterkina ◽  
E. A. Solovieva ◽  
I. S. Gnezdilova
Keyword(s):  
Social Status ◽  
Bronze Age ◽  
Large Scale ◽  
Distribution Center ◽  
Interaction Patterns ◽  
Cultural Interaction ◽  
Complex Construction ◽  
Korean Type ◽  
High Social Status ◽  
The Bronze Age

This study focuses on ritual bronze items that are very informative for reconstructing cultural ties and migrations between Korea and Japan in 400 BC to 300 AD. Their large-scale introduction to Korea is related to the culture of Korean-type daggers, whose distribution center was located in northwestern Korea. We give a detailed description of Bronze Age artifacts, including weapons and ritual items from that area. They occur mostly in single burials with a complex construction, possibly attesting to high social status. In Japan, Korean-type artifacts fi rst appear in northern Kyushu during the Yayoi age, in burials with wooden coffi ns and urns. The analysis of molds for casting narrow-bladed daggers, socketed spearheads, and picks suggests that Korean-type items spread from northern Kyushu. Late Yayoi ritual bronze artifacts include mostly mirrors of the Han type, evidently indicating migrations from the mainland.

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