scholarly journals Near Optimum Selection of Module Configuration for Efficient Modular Construction

2015 ◽  
pp. 95-104
Author(s):  
Osama Moselhi ◽  
Tarek Salama
Keyword(s):  
Volume Index ◽  
Construction Site ◽  
Modular Construction ◽  
Suitability Index ◽  
Optimum Selection ◽  
The Matrix ◽  
Project Construction ◽  
Cost Penalty ◽  
Selection Of

Modular construction has received considerable attention in recent years. This has been attributed to its impact on cost and time reduction and improved productivity and quality of constructed facilities. Modular construction can also result in improved safety on construction jobsites and reduced material waste. Most recent work in this field focused cranes selection and location, more suited scheduling methods and issues pertinent to logistics, without due consideration to optimized modules configuration. This paper introduces a newly developed unified modular suitability index to accomplish a near optimum selection of module configuration for efficient modular residential construction. The developed modular suitability index (MSI) utilizes five indices; 1) connections index (CI) that evaluates the module connections using the matrix clustering technique along with the bond energy algorithm, 2) transportation dimensions index (TDI) that accounts for the module dimensions’ effects on transportation, 3) transportation shipping distance index (TSDI) to evaluate the distance between modules fabrication and assembly facility and the project construction site, 4) crane cost penalty index (CCPI) to evaluate the crane cost relevant to the module placing rate, and 5) concrete volume index (CVI) to evaluate the project’s foundation concrete quantities. Calculating the modular suitability index (MSI) provides a unified indicator for the project stakeholders to assess the suitability of different modular configuration and support near optimum modules.

Procedure for Admittance of the Contractor Companies to Perform the Work at the Construction Site

2021 ◽  
pp. 24-28
Author(s):  
E.V. Glebova ◽  
◽  
E.A. Fomin ◽  
M.V. Ivanova ◽  
◽  
...  
Keyword(s):  
Injury Rate ◽  
Construction Site ◽  
Matrix Elements ◽  
Current Period ◽  
The Matrix ◽  
Industrial Injuries ◽  
High Level ◽  
The Given ◽  
Selection Of

The article is devoted to the assessment of the contractor companies activity in the field of safety both before the start of work execution and during the execution of work at the construction site of the Client’s company. Analysis is given concerning the industrial injuries from 2009 to 2018 in Russia, based on which the tendency to reduce industrial injuries for the current period is determined, and the coefficients of the frequency of injuries in various countries for 2015 are calculated. Based on the performed analysis, the injury rate in Russia is still at a high level. Economic component for the materials, personnel qualifications, and savings on safety from the Client’s company can also lead to injuries at the construction site. The main reasons for low quality of the work performed at the construction site, which in turn lead to injuries, are given in the article. Matrix for the assessment of the contractor companies was developed, with the help of which it is proposed to assess all the aspects of their activities that effect on safety of the work performed. Among the assessed aspects there are sections related to training, behavior and motivation of the personnel, audits conducted by the contractor companies in relation to the subcontractors, investigation of incidents by using the current procedures and contractor personnel responsibilities. One of the matrix elements is presented for assessment. Each element from the given section is proposed to be assessed on a scale from 0 to 3, where each aspect is presented in the form of an action, an assessment of this action and its result. Recommendations on the use of this methodology in the selection of contractors are provided.

scholarly journals QUALITY PREDICTION OF DENSE POINTS GENERATED BY STRUCTURE FROM MOTION FOR HIGH-QUALITY AND EFFICIENT AS-IS MODEL RECONSTRUCTION

2019 ◽  
Vol XLII-2/W13 ◽  
pp. 95-101
Author(s):  
R. Moritani ◽  
S. Kanai ◽  
H. Date ◽  
Y. Niina ◽  
R. Honma
Keyword(s):  
Structure From Motion ◽  
Point Clouds ◽  
Quality Prediction ◽  
Construction Site ◽  
Model Reconstruction ◽  
High Quality ◽  
Bridge Column ◽  
Dense Point ◽  
Selection Of

<p><strong>Abstract.</strong> In this paper, we introduce a method for predicting the quality of dense points and selecting low-quality regions on the points generated by the structure from motion (SfM) and multi-view stereo (MVS) pipeline to realize high-quality and efficient as-is model reconstruction, using only results from the former: sparse point clouds and camera poses. The method was shown to estimate the quality of the final dense points as the quality predictor on an approximated model obtained from SfM only, without requiring the time-consuming MVS process. Moreover, the predictors can be used for selection of low-quality regions on the approximated model to estimate the next-best optimum camera poses which could improve quality. Furthermore, the method was applied to the prediction of dense point quality generated from the image sets of a concrete bridge column and construction site, and the prediction was validated in a time much shorter than using MVS. Finally, we discussed the correlation between the predictors and the final dense point quality.</p>

Elements and Materials Improve the FDM Products: A Review

2016 ◽  
Vol 16 ◽  
pp. 33-51 ◽  
Author(s):  
Abduladim Salem Bala ◽  
Saidin bin Wahab ◽  
Mazatusziha binti Ahmad
Keyword(s):  
Matrix Material ◽  
Process Parameter ◽  
Correct Selection ◽  
Complex Environment ◽  
Technology Process ◽  
The Matrix ◽  
Additive Materials ◽  
Insight Into ◽  
Selection Of

This work aims to provide a review of available published literature that explores the opportunities to improve the quality of fused deposit modelling (FDM) products, particularly in medical applications. The paper presents details concerning the basis of the technology, process parameter settings and their responses, and reviews the properties of common FDM engineering/bio-materials and the available methods applied for improving their performance. Based on the researches which have been reviewed, FDM technology works within a complex environment from process parameters. Thus, it can achieve good results only with the proper settings for these parameters according to the properties of the material used. Improving the polymers is essentially based on the correct selection of additive materials, which can particularly enhance the key property/properties in the matrix material. This review provides a brief insight into FDM technology, provides an idea of the process parameter settings, the available materials and ways of modifying their properties to consequently improve the quality of FDM products.

Near optimum selection of module configuration for efficient modular construction

2017 ◽  
Vol 83 ◽  
pp. 316-329 ◽  
Author(s):  
Tarek Salama ◽  
Ahmad Salah ◽  
Osama Moselhi ◽  
Mohamed Al-Hussein
Keyword(s):  
Modular Construction ◽  
Optimum Selection ◽  
Selection Of

scholarly journals Research on construction site management of environmental protection engineering

2018 ◽  
Author(s):  
Huimin Zhao ◽  
Zilong Li ◽  
Xiaoqing Ma ◽  
Zhiyong Ma ◽  
Na Li
Keyword(s):  
Environmental Protection ◽  
Construction Site ◽  
Site Management ◽  
Protection Effect ◽  
Engineering Construction ◽  
The Social ◽  
Project Construction ◽  
Control And Management ◽  
Protection Engineering

With the improvement of the social and economic level, the quality of people's lives has been significantly improved, and environmental protection has gradually attracted people's attention. Environmental protection projects have developed rapidly in this environment. In order to further improve the environmental protection effect of the project construction, it is necessary to do a good job of control and management of the construction site. Judging from the current situation, there are still many problems in China's environmental protection engineering construction site management. Based on this, this article analyzes the deficiencies in the field management of environmental protection projects and proposes corresponding solutions, hoping to promote the overall level of environmental protection projects.

scholarly journals Exploring the Perfection Measures of Quality Management in Construction Site of Industrial and Civil Buildings

2017 ◽  
Vol 1 (3) ◽  
Author(s):  
Zhang Wei
Keyword(s):  
Construction Industry ◽  
Construction Projects ◽  
Rapid Development ◽  
Construction Workers ◽  
Construction Site ◽  
Construction Enterprises ◽  
Existing Problems ◽  
Project Construction ◽  
The Cost

At the present stage, China's construction industry has achieved rapid development with the rapid development of our society and economy. In the construction of our country's construction industry, scientific and rational project construction management can not only effectively improve the safety quality of construction workers, strengthen the personnel management of construction workers, effectively reduce the accidents of construction projects, but also can save the cost of construction projects and improve the economic efficiency of construction enterprises to the greatest extent. In view of this, this paper first analyzes the existing problems in the management of industrial and civil construction site and puts forward corresponding solutions.

Construction Site Layout Evaluation by Intuitionistic Fuzzy TOPSIS Model

2011 ◽  
Vol 71-78 ◽  
pp. 583-588 ◽  
Author(s):  
Xin Ning ◽  
Li Guo Wang
Keyword(s):  
Fuzzy Topsis ◽  
Construction Site ◽  
Construction Operations ◽  
Intuitionistic Fuzzy ◽  
Site Layout ◽  
Qualitative Factors ◽  
Construction Site Layout ◽  
Intuitionistic Fuzzy Topsis ◽  
Selection Of

Effective construction site layout planning (CSLP) shall improve construction operations efficiently and enhance work environment safety. The majority researches works on CSLP focused on developing different algorithms and program to generate site layout alternatives using quantitative and qualitative factors involved in the interaction flows. However, some qualitative factors, such as security and noise control are not taken into consideration. This study proposed intuitionistic fuzzy TOPSIS method to evaluate and select the best site layout from site layout alternatives in terms of the project-specific attributes, which are neglected and hard to quantify in generating site layout alternatives. The results show that the proposed method improves the quality of decision making in evaluation and selection of the best construction site layout.

scholarly journals Research on construction site management of environmental protection engineering

2018 ◽  
Vol 2 (3) ◽  
Author(s):  
Huimin Zhao ◽  
Zilong Li ◽  
Xiaoqing Ma ◽  
Zhiyong Ma ◽  
Na Li
Keyword(s):  
Environmental Protection ◽  
Construction Site ◽  
Site Management ◽  
Protection Effect ◽  
Engineering Construction ◽  
The Social ◽  
Project Construction ◽  
Control And Management ◽  
Protection Engineering

With the improvement of the social and economic level, the quality of people's lives has been significantly improved, and environmental protection has gradually attracted people's attention. Environmental protection projects have developed rapidly in this environment. In order to further improve the environmental protection effect of the project construction, it is necessary to do a good job of control and management of the construction site. Judging from the current situation, there are still many problems in China's environmental protection engineering construction site management. Based on this, this article analyzes the deficiencies in the field management of environmental protection projects and proposes corresponding solutions, hoping to promote the overall level of environmental protection projects.

scholarly journals DETERMINING THE OPTIMAL DIMENSIONS FOR A MECHANISM FROM A WHEELCHAIR USING LABVIEW

2018 ◽  
Vol 6 (1) ◽  
pp. 240-247
Author(s):  
Vlad Gheorghita ◽  
Catalin Gheorghita
Keyword(s):  
Development Process ◽  
Product Development Process ◽  
Improve Performance ◽  
Software Model ◽  
Design Changes ◽  
Optimum Selection ◽  
The Stability ◽  
Experimental Values ◽  
Selection Of

The optimum selection of process parameters plays a very important role to ensure quality of product, to reduce the machining cost and to increase the productivity. Customizing a product to improve performance requires a reliable method to measure performance, in order to evaluate the effects that design changes have on them. A product development process can be thought as a sequence of activities to be completed. This paper has the purpope to analyse the influence of the parameters for equipment from a wheelchair that will overcome obstacles. The fuzzy logic is used through specialized software to optimize several parameters of the proposed mechanism with the purpose to ensure the stability through maintaining horizontality of the equipment. Comparing experimental values with those obtained through the software model, is determined whether the model used is consistent.

The study of sewing damage and defects in garments

2018 ◽  
Vol 22 (2) ◽  
pp. 109-125 ◽  
Author(s):  
Awadhesh Kumar Choudhary ◽  
Monica Puri Sikka ◽  
Payal Bansal
Keyword(s):  
Review Paper ◽  
Woven Fabric ◽  
Content Type ◽  
Sewing Thread ◽  
Fabric Structure ◽  
Optimum Selection ◽  
Fabric Construction ◽  
And Control ◽  
Selection Of

PurposeThe purpose of this review paper is to define the dominating factors (such as fiber, yarn, fabric structure, sewing thread, sewing needle and machine parameters) that affect the seam damages and causing defects. It also describes the various explanations of sewing defects in garment production and critically analyzes them for optimum selection of parameters and speeds for minimizing such faults. Hence, the knowledge of various factors which affect the sewing damages/defects will be helpful for garment manufacturers/researchers to know influence of the parameters and control the quality of producing seam.Design/methodology/approachThis section is not applicable for a review paper.FindingsSewing damages such as needle cut and other sewing damages/defects are studied mostly in woven fabric. There are very few studies conducted on knitted fabric sewing damages/defects. The sewing damage problems do not have single solution that is capable of removing these damages in fabric. All the determined and affecting parameters related to fiber, yarn, fabric construction, sewing thread and sewing machine must be examined to design appropriate remedial measurement related to machine design, fabric parameters and sewing thread. This could help in minimizing or eliminating the needle cut and other sewing damage problems.Originality/valueIt is an original review work and is helpful for garment manufacturers/researchers to reduce the defects and be able to produce good quality seam.

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