scholarly journals Statistical analysis of large building contractors’ awareness on cost-significant elements of high-rise condominium projects

2018 ◽  
Vol 1053 ◽  
pp. 012140
Author(s):  
Cheng-Sim Lim ◽  
Wah-Peng Lee ◽  
Tien-Choon Toh
Keyword(s):  
Statistical Analysis ◽  
High Rise ◽  
Large Building

scholarly journals Monitoring the Impact of the Large Building Investments on the Neighborhood

2021 ◽  
Vol 11 (14) ◽  
pp. 6537
Author(s):  
Marian Łupieżowiec
Keyword(s):  
Groundwater Level ◽  
Soil Improvement ◽  
Deep Excavation ◽  
Large Area ◽  
Safety Measures ◽  
High Rise ◽  
The Impact ◽  
Large Building ◽  
Additional Safety ◽  
Made In

The article presents the concept of monitoring buildings and infrastructure elements located near large construction investments (the construction of high-rise buildings of the Oak Terraces housing estate in Katowice and the construction of a tunnel under the roundabout in Katowice along the intercity express road DTŚ). The impacts include deep excavation, lowering of the groundwater level over a large area, and dynamic influences related to the use of impact methods of soil improvement. The presented monitoring includes observation of the groundwater level with the use of piezometers, geodetic measurements of settlement and inclinations, as well as the measurement of vibration amplitudes generated during the works involving shocks and vibrations. It was also important to observe the development of cracks on the basis of a previously made inventory of damage. The results of the monitoring allow corrections to be made in the technology of works (e.g., reduction of vibration amplitudes, application of additional protections at excavations, etc.) or the use additional safety measures. Currently, there are also monitoring systems used during the operation of completed facilities.

Cracking and Temperature Control in Mass Concrete Construction

2012 ◽  
Vol 446-449 ◽  
pp. 841-845 ◽  
Author(s):  
Zhong Qing Xu ◽  
Yong Gang Ding ◽  
Chang Yi Zhai ◽  
Qiang Jun Li
Keyword(s):  
Temperature Field ◽  
Mass Concrete ◽  
Infinite Element ◽  
High Rise ◽  
Curing Period ◽  
Cracking Control ◽  
Infinite Element Method ◽  
National Stadium ◽  
Large Building ◽  
Element Method

With the development of economy, the area of construction grows fast, the use of mass concrete basic of the high-rise and large building also becomes normal. So the cracking control of mass concrete has become an important topic nowadays. In this paper, the mechanism of the cracking and the methods to control the cracking will be studied. And then the stress and temperature field of the basic platform of the national stadium in the mass concrete curing period will be studied by infinite element method. After that, results of the infinite element method will be compared with the results of monitoring. At last, we can come to a conclusion that the cracking of the mass concrete can be controlled in reasonable limits by some measures.

scholarly journals Difference in S-Curve for Different Types of Construction Projects

2021 ◽  
Author(s):  
Ehab Soliman ◽  
◽  
Khaled Alrasheed ◽  
Keyword(s):  
Statistical Analysis ◽  
Cash Flow ◽  
Construction Projects ◽  
Middle Part ◽  
Project Duration ◽  
Cash Flow Management ◽  
High Rise ◽  
Different Types ◽  
S Curve ◽  
The State Of Kuwait

Project cash flow and contractor S-curve are tools that can be used to measure, control and anticipate project progress. Few studies dedicated to evaluate and judge the behaviour of the original S-curve. This study aims to evaluate the similarities and changes of construction projects S curves between different project types. More than 40 S-curves were collected from the state of Kuwait for different types of construction projects. The list of collected curves divided into six groups based on the type of client, no of buildings and number of floors. Statistical analysis used to compare the curves inside each group of projects. Statistical analysis using test of normality, T-paired test then Standard Euclidean Distance were applied to evaluate the similarity and changes between groups. This study revealed that there is a level of similarity of S-curves for high rise buildings and there is no similarity of S-curves for one or multi-building projects. The maximum gap between S-curves for one and high rise building laying in the middle part of project duration, while the maximum gap between S-curves for multi-building project laying in 70% to 80% of project duration. This study revealed that the variance of S-curve behaviour indicating there is no common attitude for all types of construction project types. This study can help construction stakeholders to anticipate their expected expenses and help in project cash flow management.

Statistical analysis of classification

1966 ◽  
Vol 24 ◽  
pp. 188-189
Author(s):  
T. J. Deeming
Keyword(s):  
Multivariate Analysis ◽  
Statistical Analysis ◽  
Classification Scheme ◽  
Analytical Procedure ◽  
Narrow Band ◽  
Scientific Research ◽  
Maximum Amount ◽  
Amount Of Information

If we make a set of measurements, such as narrow-band or multicolour photo-electric measurements, which are designed to improve a scheme of classification, and in particular if they are designed to extend the number of dimensions of classification, i.e. the number of classification parameters, then some important problems of analytical procedure arise. First, it is important not to reproduce the errors of the classification scheme which we are trying to improve. Second, when trying to extend the number of dimensions of classification we have little or nothing with which to test the validity of the new parameters.Problems similar to these have occurred in other areas of scientific research (notably psychology and education) and the branch of Statistics called Multivariate Analysis has been developed to deal with them. The techniques of this subject are largely unknown to astronomers, but, if carefully applied, they should at the very least ensure that the astronomer gets the maximum amount of information out of his data and does not waste his time looking for information which is not there. More optimistically, these techniques are potentially capable of indicating the number of classification parameters necessary and giving specific formulas for computing them, as well as pinpointing those particular measurements which are most crucial for determining the classification parameters.

Quantitative parallel EELS spectrum imaging developed as a new tool in AEM

1992 ◽  
Vol 50 (2) ◽  
pp. 1202-1203
Author(s):  
Gianluigi Botton ◽  
Gilles L'espérance
Keyword(s):  
Statistical Analysis ◽  
Spatial Resolution ◽  
Personal Computer ◽  
Systematic Study ◽  
Present Author ◽  
Chemical Elements ◽  
Detection Limits ◽  
Research Groups ◽  
Quantitative Performance ◽  
Spectrum Imaging

As interest for parallel EELS spectrum imaging grows in laboratories equipped with commercial spectrometers, different approaches were used in recent years by a few research groups in the development of the technique of spectrum imaging as reported in the literature. Either by controlling, with a personal computer both the microsope and the spectrometer or using more powerful workstations interfaced to conventional multichannel analysers with commercially available programs to control the microscope and the spectrometer, spectrum images can now be obtained. Work on the limits of the technique, in terms of the quantitative performance was reported, however, by the present author where a systematic study of artifacts detection limits, statistical errors as a function of desired spatial resolution and range of chemical elements to be studied in a map was carried out The aim of the present paper is to show an application of quantitative parallel EELS spectrum imaging where statistical analysis is performed at each pixel and interpretation is carried out using criteria established from the statistical analysis and variations in composition are analyzed with the help of information retreived from t/γ maps so that artifacts are avoided.

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