Improving Accuracy in Predicting City-Level Construction Cost Indices by Combining Linear ARIMA and Nonlinear ANNs

2022 ◽  
Vol 38 (2) ◽  
Author(s):  
Sooin Kim ◽  
Chi-Young Choi ◽  
Mohsen Shahandashti ◽  
Kyeong Rok Ryu
Keyword(s):  
Construction Cost ◽  
Improving Accuracy

High-voltage Electron Microscopy: Where it is and where it may be going

1995 ◽  
Vol 53 ◽  
pp. 80-81
Author(s):  
Charles W. Allen
Keyword(s):  
Electron Microscopy ◽  
High Voltage ◽  
Construction Cost ◽  
Research Community ◽  
High Voltage Electron Microscopy ◽  
Voltage Electron ◽  
High Voltage Electron ◽  
Materials Research

High voltage TEMs were introduced commercially thirty years ago, with the installations of 500 kV Hitachi instruments at the Universities of Nogoya and Tokyo. Since that time a total of 51 commercial instruments, having maximum accelerating potentials of 0.5-3.5 MV, have been delivered. Prices have gone from about a dollar per volt for the early instruments to roughly twenty dollars per volt today, which is not so unreasonable considerinp inflation and vastly improved electronics and other improvements. The most expensive HVEM (the 3.5 MV instrument at Osaka University) cost about 5 percent of the construction cost of the USA's latest synchrotron.Table 1 briefly traces the development of HVEM in this country for the materials sciences. There are now only three available instruments at two sites: the 1.2 MeV HVEM at Argonne National Lab, and 1.0 and 1.5 MeV instruments at Lawrence Berkeley National Lab. Fortunately, both sites are user facilities funded by DOE for the materials research community.

Improving Accuracy and Consistency in Child Maltreatment Severity Assessment in Spain

2012 ◽  
Author(s):  
Ignacia Arruabarrena ◽  
Joaquin de Paasl ◽  
Silvia Indias ◽  
Maria Ullate
Keyword(s):  
Child Maltreatment ◽  
Severity Assessment ◽  
Improving Accuracy

Improving Accuracy of a Self-Report Measure of Substance Use

2007 ◽  
Author(s):  
Elizabeth R. Rahdert ◽  
David L. Wyrick ◽  
Melodie Fearnow-Kenney
Keyword(s):  
Substance Use ◽  
Self Report ◽  
Improving Accuracy ◽  
Report Measure

Construction Cost of KP Mill Construction for Bioethanol Production

2015 ◽  
Vol 69 (5) ◽  
pp. 518-531
Author(s):  
Tokiya Yaguchi ◽  
Makoto Iwasaki ◽  
Youichiro Isono
Keyword(s):  
Construction Cost ◽  
Bioethanol Production

Diagnostics of the location of damage to tubing oil well pipes

2019 ◽  
Vol 5 (4) ◽  
pp. 115-128
Author(s):  
Timur A. Ishmuratov ◽  
Rif G. Sultanov ◽  
Milyausha N. Khusnutdinova
Keyword(s):  
Fluid Motion ◽  
Oil Well ◽  
General Belief ◽  
Oil Flow ◽  
Specialized Equipment ◽  
Improving Accuracy ◽  
Analytical Expressions ◽  
Technical Measures ◽  
Quick Determination

The study is devoted to the mathematical description of the process of oil outflow in places of leakage of the tubing string, which allows a computer to locate a leakage in the tubing. The authors propose methodology for identifying defects in the tubing and determining the location of the leak. The uniqueness of this methodology lies in quick determination of the place of leakage without the use of specialists, sophisticated and specialized equipment. Mathematical modeling of oil flow in the tubing requires the apparatus of continuum mechanics. It is a general belief that the movement of oil in the pipe flows at low speeds due to its outflow from the hole. Using the general equations of mass and energy balance, the authors have obtained differential equations of fluid motion in a vertical pipe in the process of its outflow from the tubing and in the process of injection. Analytical expressions are the solution to these equations, as they can help in estimating the degree of damage and its location, as well as the feasibility of its eliminating. The results show that an increase in the leakage and injection times leads to improving accuracy of locating damage. Thus, when conducting various geological and technical measures (GTM) at the well, it is possible to assess the presence of leakage and its intensity when deciding on the repair of tubing.

METHODS OF IMPROVING ACCURACY OF MEASURING OUTPUT CHARACTERISTICS OF TENSOMETRIC ELEMENTS AND TESTMODULES

2018 ◽  
pp. 10-19
Author(s):  
S. A. Adarchin ◽  
A. V. Mazin
Keyword(s):  
Pressure Sensors ◽  
Control Object ◽  
Complete Information ◽  
Substrate Material ◽  
Automated Control ◽  
Urgent Task ◽  
Technical Specifications ◽  
Output Characteristics ◽  
Improving Accuracy ◽  
Microprocessor Technology

Over the past few years, thanks to the success of microprocessor technology, there has been a significant leap in the development and application of automated control systems. In such systems, information obtained from a set of sensors installed on the control object and giving complete information about it is used to form the control action. Improving the accuracy of measurement of their characteristics becomes an urgent task. This paper is considered to study of the processes of degradation of microelectromechanical structures of integral measuring tensometric elements, for example, pressure sensors, expressed in the obtaining of the output characteristics of the sensor for the regulations set forth in the technical specifications. The technique allowing to measure the parameters of the output signal of the strain cell with the help of a special installation is developed. The results of the experiments determined that when using material with a small modulus of elasticity can be used for the planting element, any substrate material of test module. The developed technique can be used in the production and design of the strain gauge, and the sensor as a whole.

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