scholarly journals Use of the Distance Transform for Integration of Local Measurements: Principle and Application in Chemical Engineering

2016 ◽  
Vol 22 (2) ◽  
pp. 422-431 ◽  
Author(s):  
Loïc Sorbier ◽  
Frédéric Bazer-Bachi ◽  
Yannick Blouët ◽  
Maxime Moreaud ◽  
Virginie Moizan-Basle
Keyword(s):  
Chemical Engineering ◽  
Least Square ◽  
Infinite Cylinder ◽  
Distance Transform ◽  
High Symmetry ◽  
Object A ◽  
Local Measurements ◽  
Symmetrical Object ◽  
Relative Errors ◽  
The Cost

AbstractWe propose an original methodology to integrate local measurement for nontrivial object shape. The method employs the distance transform of the object and least-square fitting of numerically computed weighting functions extracted from it. The method is exemplified in the field of chemical engineering by calculating the global metal concentration in catalyst grains from uneven metal distribution profiles. Applying the methodology on synthetic profiles with the help of a very simple deposition model allows us to evaluate the accuracy of the method. For high symmetry objects such as an infinite cylinder, relative errors on global concentration are lower than 1% for well-resolved profiles. For a less symmetrical object, a tetralobe, the best estimator gives a relative error below 5% at the cost of increased measurement time. Applicability on a real case is demonstrated on an aged hydrodemetallation catalyst. Sampling of catalyst grains at the inlet and outlet of the reactor allowed conclusions concerning different reactivity for the trapped metals.

scholarly journals Use of the Distance Transform for the Integration of Local Measurements: Principle and Application in the Field of Chemical Engineering

2014 ◽  
Vol 20 (S3) ◽  
pp. 866-867 ◽  
Author(s):  
Loïc Sorbier ◽  
Maxime Moreaud ◽  
F. Bazer-Bachi ◽  
Virginie Moizan-Basle
Keyword(s):  
Chemical Engineering ◽  
Distance Transform ◽  
Local Measurements

scholarly journals Pengaruh Sikap, Norma Subyektif dan Kontrol Perilaku yang Dirasakan Terhadap Niat Beli Pupuk Petroganik di Kabupaten Boyolali

2018 ◽  
Vol 14 (2) ◽  
pp. 95
Author(s):  
Novitasari Dika Kusuma Dewi ◽  
Eny Lestari ◽  
Heru [email protected] Irianto
Keyword(s):  
Structural Equation ◽  
Structural Equation Models ◽  
Environmental Awareness ◽  
Subjective Norms ◽  
Partial Least Square ◽  
Least Square ◽  
Product Attributes ◽  
Survey Techniques ◽  
Multi Stage ◽  
The Cost

<em>This   research   aims   to   find   out   the   effects   of   product   attributes, environmental awareness, the cost of fertilizer usage, subjective norms to the attitude of Petroganik fertilizer purchases also to find out the effects of attitude, subjective norms and cost of fertilizer usage to the intentions of purchasing Petroganik fertilizer. The method used in this research is explanatory methods by using survey techniques. Method taken to determine research location was conducted purposively and this research is done in Nogosari District and Musuk District. The method used for gathering samples with multi stage random sampling. Samples in this research were collected  from  64  respondents  split  from  4  villages  and  8  group  farmers.  The technique of collecting data was solved through observation, interviews, and logging. The analysis of the sample data used for this research is Structural Equation Models (SEM) method and also Partial Least Square (PLS) as an altiernative method. The research finds that (1) product attributes and  environmental awareness positively determinants of  purchase attitudes. (2) subjective norms, purchase attitudes, and cost of fertilizer usage affects the purchase intentions for Petroganik fertilizer.</em>

scholarly journals Different Nonlinear Regression Techniques and Sensitivity Analysis as Tools to Optimize Oil Viscosity Modeling

Resources ◽  
2021 ◽  
Vol 10 (10) ◽  
pp. 99
Author(s):  
Dicho Stratiev ◽  
Svetoslav Nenov ◽  
Dimitar Nedanovski ◽  
Ivelina Shishkova ◽  
Rosen Dinkov ◽  
...  
Keyword(s):  
Sensitivity Analysis ◽  
Nonlinear Regression ◽  
Information Criterion ◽  
Least Square ◽  
Gas Oil ◽  
Oil Viscosity ◽  
Prediction Ability ◽  
Regression Techniques ◽  
Comparable Accuracy ◽  
Relative Errors

Four nonlinear regression techniques were explored to model gas oil viscosity on the base of Walther’s empirical equation. With the initial database of 41 primary and secondary vacuum gas oils, four models were developed with a comparable accuracy of viscosity calculation. The Akaike information criterion and Bayesian information criterion selected the least square relative errors (LSRE) model as the best one. The sensitivity analysis with respect to the given data also revealed that the LSRE model is the most stable one with the lowest values of standard deviations of derivatives. Verification of the gas oil viscosity prediction ability was carried out with another set of 43 gas oils showing remarkably better accuracy with the LSRE model. The LSRE was also found to predict better viscosity for the 43 test gas oils relative to the Aboul Seoud and Moharam model and the Kotzakoulakis and George.

The effects of corporate disclosure on firm value and firm performance: evidence from Turkey

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Hüseyin Temiz
Keyword(s):  
Firm Performance ◽  
Firm Value ◽  
Fixed Effects ◽  
Ordinary Least Squares ◽  
Least Square ◽  
Corporate Disclosure ◽  
Content Type ◽  
Regulatory Bodies ◽  
Transparency And Disclosure ◽  
The Cost

Purpose The purpose of this study is to investigate the effects of firms’ disclosure practices on firm value and firm performance. Design/methodology/approach Firms’ disclosure scores were calculated based on unique hand-collected data by using the S&P transparency and disclosure index (S&P TD index). Ordinary least squares with year/firm fixed effects and two-stage least square methods were used to test the hypothesis. Findings It is observed that firms’ disclosure scores have positive and statistically significant effects on firm value. However, firms’ disclosure scores do not have significant effects on firm performance. This result is mostly observed in sub-categories of the index. Practical implications Results show that disclosed information has an impact on firm value. Therefore, standardization and increasing the reliability of this information are necessary for both information users and firms. It is important to standardize the information published by the firms and to increase their reliability by implementing new regulations by regulatory bodies in Turkey. Social implications Firms bear the costs due to their disclosure practices. However, the benefits derived from this situation may be higher than the cost incurred. Hence, it is suggested that firms that are traded in Turkey consider this in the determination of their disclosure policy. Originality/value This is the first study that investigates the effects of firms’ disclosure scores on both firm value and firm performance by using the S&P TD index in the Turkish context.

Characterization of Micro-Fluidic Exhaust Sensors Through Fully Coupled Modeling of Multi-Component Gas Transport and Reaction

2008 ◽  
Author(s):  
Stephan Go¨ll ◽  
Manfred Piesche
Keyword(s):  
Gas Flow ◽  
Chemical Engineering ◽  
Equations Of Motion ◽  
Gas Mixtures ◽  
Transport Processes ◽  
Coupled Modeling ◽  
Transient Transport ◽  
Chemically Induced ◽  
The Cost

Transport and reaction of gas mixtures in porous media are common phenomena in many chemical engineering applications. One favored method of modeling the transport processes is to notionally substitute a uniform bundle of tortuous channels for the irregular porous structure. Then, accurate equations of motion for the gas flow and diffusion inside these small-sized channels can be used. This advantage comes at the cost of two additional parameters that enter into the equations, the tortuosity factor and the equivalent capillary diameter. In this work, an existing model for transient transport of multi-component gas mixtures has been expanded to comprise heterogeneous fluid domains and chemical reaction. It can be applied to fluid domains that partially or completely enclose porous regions. The potential of the present model is demonstrated by simulating the electro-chemically induced and transport-limited signal formation inside an exhaust gas sensor.

scholarly journals Determination of Resonance terms using Optical Observations of Two Meteosat Satellites

1997 ◽  
Vol 165 ◽  
pp. 355-360
Author(s):  
U. Hugentobler ◽  
T. Schildknecht ◽  
G. Beutler
Keyword(s):  
Radiation Pressure ◽  
Ccd Camera ◽  
Least Square ◽  
Optical Observations ◽  
Laser Ranging ◽  
Time Interval ◽  
Orbital Parameters ◽  
Adjustment Procedure ◽  
Relative Errors

AbstractDuring an observation campaign in winter 94/95 astrometric positions from Meteosat 4 and 5 were acquired at the Zimmerwald observatory using a CCD camera mounted in the prime focus of the 0.5 m Satellite Laser Ranging telescope. The measurements cover a time interval of four months, their precision is of the order of .The modeling of radiation pressure for the small, cylindrically shaped satellites is relatively easy and they are therefore excellent objects to probe the geopotential. The orbital parameters and the radiation pressure coefficients for the two satellites as well as the resonant coefficients C22, S22 of the geopotential were determined by a single least square adjustment procedure including all the Zimmerwald observations. The relative errors estimated for the terms C22 and S22 are of the order of 1 ÷ 3 · 10−4.

A Method to Obtain the Position of Space Object Based on Monocular Vision and Laser Ring

2011 ◽  
Vol 308-310 ◽  
pp. 1619-1626
Author(s):  
Nan Yin ◽  
Xing Long Zhu ◽  
Xin Zhao ◽  
Shang Gao
Keyword(s):  
Light Source ◽  
Target Object ◽  
Closed Curve ◽  
Monocular Vision ◽  
Least Square ◽  
Virtual Object ◽  
Space Object ◽  
Object A ◽  
Curve Equation ◽  
Laser Ring

When the cylindrical laser shines on the target object, a spot can be obtained, which the edge is a closed curve, marked as C1. The imaging of the curve C1 on the image surface of CCD is a closed curve C2 too. Coordinate system is established to describe the position relationship among camera, image and light source, and to analyze the principle for monocular vision and laser ring to get the information about the object depth. In order to solve the problem and make the above principle clear, the key is to work out the expression for the curve C2 on the image surface of CCD. In order to calculate the closed curve C2 expression, the curve C2 will firstly be divided into two parts, the upper curve and the lower one. According to least-square polynomial, discrete points on the curves of two parts are drawn out, constraints are established and the curve equations are fitted. Then, to verify practicality of this method, a virtual model scene will be created, through which relevant data describing edge of virtual CCD image and that of a virtual spot when the virtual light source alights on the virtual object will be obtained. At last, closed curve equation will be fitted in accordance with data describing edge of virtual image; the position of space object will be fixed by making use of light source equation and closed curve equation; and a contrast will be made between the calculated value and data of the spot edge to prove whether a method to obtain the position of space objects based on monocular vision and laser ring is feasible.

scholarly journals State estimation in a decentralized discrete time LQG control for a multisensor system

2017 ◽  
Vol 27 (1) ◽  
pp. 29-39 ◽  
Author(s):  
Zdzislaw Duda
Keyword(s):  
Discrete Time ◽  
Global State ◽  
Linear Quadratic ◽  
Control Laws ◽  
Decentralized System ◽  
Multisensor System ◽  
State Estimators ◽  
Local Measurements ◽  
Information Pattern ◽  
The Cost

Abstract In the paper a state filtration in a decentralized discrete time Linear Quadratic Gaussian problem formulated for a multisensor system is considered. Local optimal control laws depend on global state estimates and are calculated by each node. In a classical centralized information pattern the global state estimators use measurements data from all nodes. In a decentralized system the global state estimates are computed at each node using local state estimates based on local measurements and values of previous controls, from other nodes. In the paper, contrary to this, the controls are not transmitted between nodes. It leads to nonconventional filtration because the controls from other nodes are treated as random variables for each node. The cost for the additional reduced transmission is an increased filter computation at each node.

Structural Optimization of Drilling Bed for Deep Hole Drilling Machine

2014 ◽  
Vol 599-601 ◽  
pp. 473-477 ◽  
Author(s):  
Yin Sai Guo ◽  
Yi Zhang ◽  
Ming Ke Cheng
Keyword(s):  
Structural Parameters ◽  
Dynamic Stiffness ◽  
Plate Thickness ◽  
Hole Drilling ◽  
Drilling Machine ◽  
Deep Hole ◽  
Deep Hole Drilling ◽  
Object A ◽  
Design Variables ◽  
The Cost

Taking the drilling bed of Z8016 deep hole drilling machine as the research object, a modal analysis of drilling bed structure is performed by ANSYS software. Assuming that the low-order natural frequencies basically remain unchanged, the structure of the drilling bed is analyzed and modified so as to decrease its weight. The bed structure is selected based on ANSYS, that is to say, the structural parameters of the drilling bed are optimized in the condition of fundamental frequency constraints, which takes wall thickness, ribbed plate thickness and the diameter of ribbed plate holes of the drilling bed as design variables. Compared with the original one, the optimal drilling bed has better dynamic stiffness, reduces material consumption, lowers the cost of the drilling bed and achieves the optimal goal.

scholarly journals CAPITAL INVESTMENTS: NORMATIVE LEGAL AND ACCOUNTING

2021 ◽  
pp. 166-181
Author(s):  
Olena PODOLIANCHUK ◽  
Nataliya GUDZENKO
Keyword(s):  
Capital Investment ◽  
Legal Framework ◽  
Legal Regulation ◽  
Capital Investments ◽  
Object A ◽  
Separate Object ◽  
The Difference ◽  
Definition Of ◽  
The Cost

The article evaluates the legal regulation and accounting of capital investments and determines that a single and precise term that would determine their essence has not yet been developed. The difference in the definitions of capital investments is outlined, which leads to confusion in their evaluation and reflection in the system of accounting accounts. There are two approaches to determining the nature of capital investment in the legal framework: economic and accounting. The dynamics and structure of capital investments by types of assets in terms of 2015-2019 are presented. Based on the results of elaboration of the regulatory framework and scientific opinions of scientists, their own opinion on the definition of capital investment has been expressed. It is noted that in the organization of accounting for capital investments it is important to assess, classify, justify objects, as well as the allocation of costs to current (to maintain the object in working order) and attribute investments to capital (improving the functional properties of the object ). A generalized classification of capital investments is proposed, which will help to timely and fully systematize the accounts and reflect in the reporting of objective and reliable information. It was found that one of the problems of accounting for capital investments is the distribution of costs and investments incurred between current costs and capital investments. Entities are invited to develop their own criteria for identifying capital investment objects and assigning the cost of repairs (capital repairs) to capital investments and approve them in the accounting policy and order. In order to ensure the objectivity of the information on capital investments, alternative changes to the Chart of Accounts have been proposed in the part of the Capital Investments account. The submitted proposals will provide an opportunity to consider capital investments as a separate object of accounting and to assess the rationality of investments.

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