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Dissertations / Theses on the topic 'The method of ratios'

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Published: 30 May 2022
Last updated: 31 July 2025

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1

Foss, Olav A. "The Rotation Ratios Method - A Method to describe altered spatial orientation in sequential radiographs from one pelvis." Doctoral thesis, Norwegian University of Science and Technology, Department of Neuroscience, 2008. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-2127.

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<p><b>The Rotation Ratios Method</b></p><p>En metode for beskrivelse av endret romlig bekkeninnstilling svedsekvensielle røntgenopptak av samme bekken</p><p><b>Sammendraget:</b></p><p>Sekvensielle røntgenopptak av ett og samme bekken blir rutinemessig brukt bl.a. innen ortopedisk kirurgi. Ofte sammenliknes korresponderende røntgenmål for å vurdere sykdomsutvikling eller vurdere effekten av en behandling. Tre-dimensjonale objekt blir transformert til to-dimensjonale bilder ved røntgenopptak. Både den romlige innstillingen av objektet og fokusering av røntgenrøret i forhold til objektet påvirker
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2

UYANIK, Öznur. "FAIR VALUE, FIRM PERFORMANCE RATIOS AND CEO COMPENSATION : An Investigation of the Association between Use of Fair Value and Firm Performance Ratios and its effect over CEO Compensation, in Sweden." Thesis, Linnéuniversitetet, Institutionen för ekonomistyrning och logistik (ELO), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-67436.

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The purpose of this study is to test the relation, if any, between use of fair value measurement and reported performance ratios of the firms and finally its effect on CEO compensation in Sweden. This research aims to contribute knowledge of decision makers about the performance-pay link in Sweden by comparing the changes of CEO compensations across the years, before and after the use of fair value method. In this sense, firms divided in two models of ownership structure: firms with family concentration and firms with dispersed ownership structure. This paper intent to contribute the explanati
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3

Ghemraoui, Adam. "Using risk ratios as a method of calculating substantial racial and ethnic disproportionality rates in school discipline." Thesis, University of British Columbia, 2017. http://hdl.handle.net/2429/63186.

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The discipline gap – a phenomenon by which students of colour (e.g., Black students) are disproportionately affected by school exclusionary discipline compared to their White peers – has been reliably documented for more than 50 years. Researchers have relied on different metrics, analysis methods, and data sources to measure the discipline gap. Regulators have proposed the standard use of risk ratios as a metric to measure disproportionality. Risk ratios require that the target group (e.g., Black students) be compared to another group (e.g., White students), however, there is a paucity of stu
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4

Sisman, Fatma Nurten. "Estimation Of Dynamic Soil Properties And Soil Amplification Ratios With Alternative Techniques." Master's thesis, METU, 2013. http://etd.lib.metu.edu.tr/upload/12615501/index.pdf.

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Earthquakes are among the most destructive natural disasters affecting urban populations. Structural damage caused by the earthquakes varies depending not only on the seismic source and propagation properties but also on the soil properties. The amplitude and frequency content of seismic shear waves reaching the earth&rsquo<br>s surface is dependent on local soil conditions. It is well known that the soft sediments on top of hard bedrock can greatly amplify the ground motion and cause severe structural damage. When the fundamental period of the soil is close to the fundamental period of a stru
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5

Kim, Hyunsun-Sunny. "Evaluation of the distributions of cost-effectiveness ratios and comparison of methods to constructing confidence intervals for such ratios /." The Ohio State University, 2000. http://rave.ohiolink.edu/etdc/view?acc_num=osu1488195633519149.

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6

Miskun, Ivan [Verfasser]. "A Novel Method for the Measurement of Half-Lives and Decay Branching Ratios of Exotic Nuclei with the FRS Ion Catcher / Ivan Miskun." Gieߟen : Universitätsbibliothek, 2020. http://d-nb.info/1209135299/34.

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7

Darssan, Darsy. "Novel sequential methods in dose-finding designs : extensions of the continual reassessment method." Thesis, Queensland University of Technology, 2014. https://eprints.qut.edu.au/69374/1/Darsy_Darssan_Thesis.pdf.

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Dose-finding trials are a form of clinical data collection process in which the primary objective is to estimate an optimum dose of an investigational new drug when given to a patient. This thesis develops and explores three novel dose-finding design methodologies. All design methodologies presented in this thesis are pragmatic. They use statistical models, incorporate clinicians' prior knowledge efficiently, and prematurely stop a trial for safety or futility reasons. Designing actual dose-finding trials using these methodologies will minimize practical difficulties, improve efficiency of dos
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8

Leydold, Josef. "Automatic Sampling with the Ratio-of-uniforms Method." Department of Statistics and Mathematics, Abt. f. Angewandte Statistik u. Datenverarbeitung, WU Vienna University of Economics and Business, 1999. http://epub.wu.ac.at/84/1/document.pdf.

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Applying the ratio-of-uniforms method for generating random variates results in very efficient, fast and easy to implement algorithms. However parameters for every particular type of density must be precalculated analytically. In this paper we show, that the ratio-of-uniforms method is also useful for the design of a black-box algorithm suitable for a large class of distributions, including all with log-concave densities. Using polygonal envelopes and squeezes results in an algorithm that is extremely fast. In opposition to any other ratio-of-uniforms algorithm the expected number of uniform r
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9

Donaldson, Michael Wayne. "Examining the Relationship between Selected Ratios and Market Capitalization of an IPO." ScholarWorks, 2015. https://scholarworks.waldenu.edu/dissertations/1821.

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This study examined the relationship between return on equity (ROE) and return on assets (ROA), the business sector, and long-term performance of new firms 5 years after the initial public offer (IPO) date. IPOs have a high rate of delisting from stock exchanges, and understanding possible predictors of long-term performance will benefit business owners and investors. The purpose of this study was to determine if ROE and ROA are predictors of long-term performance of IPOs on U.S. stock exchanges. The research question examined whether there is a statically significant relationship between the
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10

Hörmann, Wolfgang, and Gerhard Derflinger. "The Transformed Rejection Method for Generation Random Variables, an Alternative to the Ratio of Uniforms Method." Department of Statistics and Mathematics, Abt. f. Angewandte Statistik u. Datenverarbeitung, WU Vienna University of Economics and Business, 1994. http://epub.wu.ac.at/1314/1/document.pdf.

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Theoretical considerations and empirical results show that the one-dimensional quality of non-uniform random numbers is bad and the discrepancy is high when they are generated by the ratio of uniforms method combined with linear congruential generators. This observation motivates the suggestion to replace the ratio of uniforms method by transformed rejection (also called exact approximation or almost exact inversion), as the above problem does not occur for this method. Using the function $G(x) =\left( \frac(a)(1-x)+b\right)x $ with appropriate $a$ and $b$ as approximation of the inverse distr
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11

Leydold, Josef. "Short Universal Generators Via Generalized Ratio-of-Uniforms Method." Department of Statistics and Mathematics, Abt. f. Angewandte Statistik u. Datenverarbeitung, WU Vienna University of Economics and Business, 2000. http://epub.wu.ac.at/348/1/document.pdf.

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We use inequalities to design short universal algorithms that can be used to generate random variates from large classes of univariate continuous or discrete distributions (including all log-concave distributions). The expected time is uniformly bounded over all these distributions for a particular generator. The algorithms can be implemented in a few lines of high level language code. (author's abstract)<br>Series: Preprint Series / Department of Applied Statistics and Data Processing
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12

O'Hare, Eugene. "A psychopharmacological evaluation of the cyclic-ratio schedule method." Thesis, University of Ulster, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.287227.

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13

Kölblová, Lucie. "Hodnocení finanční situace podniku a návrhy na její zlepšení." Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2010. http://www.nusl.cz/ntk/nusl-222519.

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The master‘s thesis deals with analysis of the financial situation of the company Znovín Znojmo, a.s. in years 2005 – 2008 by means of selected methods of the financial analysis. At the basis of identified problematic areas proposal of measures for an improvement of the present status of the company are formulated.
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14

Chang, Chee Kean. "SPARSE DIRECT SOLUTION METHODS FOR CAPACITIVE EXTRACTION PROBLEMS ON CLOSELY-SPACED GEOMETRIES WITH HIGH ASPECT RATIOS." UKnowledge, 2017. http://uknowledge.uky.edu/ece_etds/108.

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The method of moment (MoM) [1] is a widely used method in electromagnetics to solve static and dynamic electromagnetic problems on varying geometries. However, in closely spaced geometries coupled with large aspect ratios, e.g. a large parallel plate capacitor with very small separation gap, the problem exhibits several challenges. Firstly, the close proximity of the field and source elements presents problems with convergence in numerical evaluations of the interactions between them. Secondly, the aspect ratio of the geometry gives an approximation whereby to far field points, the source cont
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15

Bolinius, Damien Johann. "Methods to measure mass transfer kinetics, partition ratios and atmospheric fluxes of organic chemicals in forest systems." Doctoral thesis, Stockholms universitet, Institutionen för miljövetenskap och analytisk kemi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-136008.

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Vegetation plays an important role in the partitioning, transport and fate of hydrophobic organic contaminants (HOCs) in the environment. This thesis aimed at addressing two key knowledge gaps in our understanding of how plants exchange HOCs with the atmosphere: (1) To improve our understanding of the uptake of HOCs into, and transfer through, leaves of different plant species which can significantly influence the transport and fate of HOCs in the environment; and (2) To evaluate an experimental approach to measure fluxes of HOCs in the field. The methods presented in papers I, II and III cont
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16

DeYoung, Clara. "Biomass Estimation Using the Component Ratio Method for White Oak." Thesis, Virginia Tech, 2014. http://hdl.handle.net/10919/50421.

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With higher demands on biomass, the ability to accurately estimate the amount in a stand is more important now than ever before. Existing models currently in use by the Forest Inventory and Analysis (FIA) program of the United States Department of Agriculture (USDA) Forest Service include the Component Ratio Method (CRM). However, testing of the CRM models is needed to validate and calibrate them. The objective of this research was to test and develop a system of equations capable of producing consistent volume and biomass estimates for standing trees of commercially important hardwood species
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17

Wiles, Kenton Broyhill. "Determination of Reactivity Ratios for Acrylonitrile/Methyl Acrylate Radical Copolymerization Via Nonlinear Methodologies Using Real Time FTIR." Thesis, Virginia Tech, 2002. http://hdl.handle.net/10919/34888.

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Reactivity ratios for the homogeneous free radical initiated copolymerization of acrylonitrile and methyl acrylate were measured by NMR on isolated, low conversion copolymers and by real time in situ FTIR. The system utilized azobisisobutyronitrile (AIBN) initiator in dimethyl formamide (DMF) at 62°. The FTIR technique allowed rapid generation of extensive copolymer compositions, which permitted application of nonlinear least squares methodology for the first time to this copolymer system. Thus, reactivity ratios at the 95% confidence level were determined to be 1.29 ± 0.2 and 0.96 ± 0.2
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18

Karakurt, Necdet. "Estimating attenuation properties of bentonite layer in Cut Bank oil field, Glacier County, Montana." Texas A&M University, 2005. http://hdl.handle.net/1969.1/3282.

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Acquisition and interpretation of 3-D seismic data led DeAngelo and Hardage (2001) to describe the channel system in the south central Cut Bank area in Glacier County, Montana. The presence of a low velocity layer called Bentonite was also discovered in the area with the help of well-logs. Bentonite is a volcanic ash, which lies on both sides of the channel system and is absent within the channel. DeAngelo and Hardage (2001) shot a vertical seismic profiling (VSP) survey at well # 54-8 to analyze the formation structure in depth, since seismic signals around the reservoir area were unclear in
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19

Huset, Regina Anne. "Methyl halides : concentrations, fluxes and stable carbon isotope ratios measured in the atmosphere, coastal waters, and soils /." Thesis, Connect to this title online; UW restricted, 2007. http://hdl.handle.net/1773/11576.

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20

Bhasin, Ankush. "Method for determination of octane rating by flame quenching experiments." Thesis, University of Iowa, 2010. https://ir.uiowa.edu/etd/782.

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There are numerous numerical and experimental studies to find correlations of octane rating with fuel properties. This thesis was based on the hypothesis that quenching characteristics at ignition locations impact the flame development. Conversely, determination of quenching characteristics might serve as an effective measure to determine the fuel mixture octane number. This hypothesis was tested with premixed flame experiments using primary reference fuels (iso-octane and n-heptane) and commercial grade gasoline. Premixed flame experiments were conducted on a flat flame burner. Primary refere
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21

Sowazi, Khanyisa. "Investigating the Gamma-ray Strength Function in 74Ge using the Ratio Method." University of the Western Cape, 2018. http://hdl.handle.net/11394/6513.

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>Magister Scientiae - MSc<br>An increasing number of measurements reveal the presence of a low-energy enhancement in the gamma-ray strength function (GSF). The GSF, which is the ability of nuclei to absorb or emit rays, provides insight into the statistical properties of atomic nuclei. For this project the GSF was studied for 74Ge which was populated in the reaction 74Ge(p,p')74Ge* at a beam energy of 18 MeV. The data were collected with the STARS-LIBERACE array at Lawrence Berkeley National Laboratory. Silicon detector telescopes were used for particle identi cation and rays in c
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22

Mutakwa, Darlington. "Analysis of the projected parity progression ratio method using two successive censuses." Master's thesis, University of Cape Town, 2013. http://hdl.handle.net/11427/5892.

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Includes abstract.<br>Includes bibliographical references.<br>The objective of this study is to assess how well the projected parity progression ratio method works when applied to two successive censuses or Demographic Health Surveys. Four countries, namely Malawi, Zimbabwe, Cambodia and Panama, each with two recent censuses which are ten years apart, are used. Each of the census and survey used is taken through a data quality assessment process to check for inconsistencies. Using age-order specific fertility rates derived from births in the past year, parity progression ratios are projected t
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23

Guerrini, K. "DEVELOPMENT OF A LC/MS-MS METHOD FOR THE STUDY OF THE RATIOS BETWEEN MORPHINE, MORPHINE-3-beta-D-GLUCURONIDE AND MORPHINE-6-beta-D-GLUCURONIDE IN BLOOD SAMPLES FROM HEROIN FATALITIES"." Doctoral thesis, Università degli Studi di Milano, 2012. http://hdl.handle.net/2434/170503.

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In heroin fatalities the diagnosis of the cause of death may be particularly difficult because of several reasons, such as the relationship between lethal dose and current individual tolerance, the complexity of heroin metabolism, the presence of systemic dysfunction, and the contemporary use of other drugs of abuse. Thus, a wide variability is present in post-mortem blood concentration of morphine (MOR), the main metabolite of heroin, which is usually the most important analytical result for the interpretation of the cause of death. Recently, increasing interest has grown towards the role of
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24

Kökény, Antonín. "Zhodnocení finanční situace podniku a návrhy na zlepšení." Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2021. http://www.nusl.cz/ntk/nusl-443013.

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The aim of the work is to evaluate the financial situation of the selected company, identify weaknesses in this area and based on the analysis to propose measures to improve the financial health of the company.
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25

Ding, Feng. "Peak-ratio analysis method for enhancement of LOM protection using M class PMUs." Thesis, University of Strathclyde, 2017. http://digitool.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=28852.

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Loss of Mains (LOM) occurs when part of the utility network containing distributed generation (DG) is disconnected from the remainder of the system. Detecting LOM will become more important in the future as higher amounts of DG will be connected to increase the use of renewable energy sources, to reduce emissions and to reduce power transmission losses. In some cases, DG can be capable of supplying loads within an island and the islanded system can remain stable. However, safety issues arise if LOM persists and, accordingly, islanded operation is not permitted in the majority of utility system
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Kuzura, Jevgenija. "Veiklą pradedančių įmonių vertės modeliavimas." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2014. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2014~D_20140603_111541-28036.

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Magistro baigiamajame darbe išanalizuoti veiklą pradedančių įmonių vertės nustatymo ypatumai. Pirmojoje, konceptualiojoje, darbo dalyje teoriniu aspektu analizuojami įmonės vertinimo ypatumai. Pateikiama įmonės vertės samprata ir reikšmė, išskiriami įmonės vertę įtakojantys veiksniai, aptarti įmonės vertės vertinimo principai. Išnagrinėti, susisteminti ir palyginti įmonės vertės nustatymo metodai, apžvelgiami tokių metodų parinkimo ypatumai. Antrojoje darbo dalyje atskleista veiklą pradedančių įmonių vertės modeliavimo tyrimo metodika. Trečiojoje, empirinėje, darbo dalyje atliktas išsamus UAB
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27

Callert, Gustaf, and Dahlström Filip Halén. "A performance investigation and evaluation of selected portfolio optimization methods with varying assets and market scenarios." Thesis, KTH, Matematisk statistik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-190997.

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This study investigates and evaluates how different portfolio optimization methods perform when varying assets and financial market scenarios. Methods included are mean variance, Conditional Value-at-Risk, utility based, risk factor based and Monte Carlo optimization. Market scenarios are represented by stagnating, bull and bear market data from the Bloomberg database. In order to perform robust optimizations resampling of the Bloomberg data has been done hundred times. The evaluation of the methods has been done with respect to selected ratios and two benchmark portfolios. Namely an equally w
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28

Wicks, Keisha. "USING A CONTINGENCY-BASED METHOD FOR COMBINING INDIVIDUAL ASSESSMENT CENTER DIMENSION RATINGS INTO OVERALL ASSESSMENT RATINGS." Doctoral diss., University of Central Florida, 2008. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3969.

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The current study applies a newly proposed mechanical combination method along with four traditional mechanical combination methods to assessment center scoring. These comparisons were made for two job levels (Fire Lieutenant and Fire Captain). The study further assesses the level of adverse impact for the various methods at three cut-off scores. Results indicated that the new contingency-based scoring method was successfully implemented in the assessment center. Results were mixed regarding whether the contingencies developed for the two job levels were different. Further, results indicated t
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29

Nichkawde, Chetan. "Nonlinear aeroelastic analysis of high aspect-ratio wings using the method of numerical continuation." Texas A&M University, 2003. http://hdl.handle.net/1969.1/3846.

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This research explores the impact of kinematic structural nonlinearities on the dynamics of a highly deformable cantilevered wing. Two different theoretical formulations are presented and analysed for nonlinear behavior. The first formulation, which is more conventional, assumes zero equilibrias and structural nonlinearities occur as terms up to third order in the Taylor series expansion of structural nonlinearities. In the second approach, no prior assumption about equilibria states of the wing is made. Kinematic nonlinearities due to curvature and inertia were retained in their exact form. T
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30

Newey, William Barton D. "A STUDY OF THE UTILIZATION OF PANEL METHOD FOR LOW ASPECT RATIO WING ANALYSIS." DigitalCommons@CalPoly, 2020. https://digitalcommons.calpoly.edu/theses/2220.

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This study demonstrates the applicability of using a modified application strategy of panel method to analyze low aspect ratio wings at preliminary design phases. Conventional panel methods fail to capture the leading edge vortex (LEV) that is shed by wings with low aspect ratios, typically below 2 depending on planform. This aerodynamic phenomenon contributes to a significant amount of the lift of these wings and the result is a drastic underestimation of the lift characteristics when analyzed by conventional panel method. To capture the effect of the leading edge vortex, a panel method code
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31

Tuo, Mingguang, Min Liang, Jitao Zhang, and Hao Xin. "Time-Domain THz Near-Field Imaging Incorporating Hadamard Multiplexing Method." IEEE, 2016. http://hdl.handle.net/10150/622785.

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Photoconductive antenna (PCA) array based THz near-field imager incorporating Hadamard multiplexing method is developed in this work. By using a 2 × 2 dipole antenna array as the THz transmitter, the system signal-to-noise ratio (SNR) is demonstrated to be improved by a factor of 2 as the theory predicts. Additionally, a 2-D scanning of a metallic structure on a THz-transparent substrate (with a total scanning area of 1 × 1 mm2) is experimentally implemented. Correlation coefficient estimation is made afterwards to quantify the reconstructed image quality.
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32

Hsu, Mimg-Hsiu, and 許名秀. "Optimal Hedge Ratios Estimate :Comparison Among Alternative EWMA Method." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/65532171318311960987.

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碩士<br>國立高雄第一科技大學<br>風險管理與保險所<br>97<br>This study applies the restricted least squares estimator(RLS),the absolute restricted least squares estimator(A-RLS), and Bias-Corrected EWMA model to estimate optimal hedge ratios for stock index futures. Using for stock index futures ,we compare the optimal hedge ratios and hedge performances with EWMA mode which under normal distribution and Power EWMA model which considers the distribution of assets return is leptokutic. Empirical result shows that the (1) Two stock index futures under any of models, using the hedge performances we can find Power EWMA
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Farahi, Kamyar. "Determining the evolution of the aminoacyl-trna synthetases by the ratios of evolutionary distance method." 2002. http://purl.galileo.usg.edu/uga%5Fetd/farahi%5Fkamyar%5F200212%5Fphd.

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Thesis (Ph. D.)--University of Georgia, 2002.<br>Directed by William B. Whitman. Includes articles submitted to Journal of molecular evolution, and Bioinformatics. Includes bibliographical references.
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Li, Jiajie. "Characterization and Performance Improvement of Chitosan Films as Affected by Preparation Method, Synthetic Polymers, and Blend Ratios." 2008. http://trace.tennessee.edu/utk_graddiss/464.

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Chitosan films prepared with addition of other polymers have been widely studied for their modified properties. In this dissertation, poly (ethylene oxide) (PEO) and poly (N-vinyl-2- pyrrolidone) (PVP) were blended with chitosan. The objectives of the study were (1) to investigate the the effects of film thickness, blend ratios, and preparation methods on the physical, and mechanical properties and functional performance of chitosan/PEO films, and (2) to compare characteristics and functional properties of chitosan/PVP and chitosan/PEO films. The results demonstrated that regular cast chitosan
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Yen, Shang-Wei, and 顏上為. "Identification of Flutter Derivatives of Bridge Decks with Different Width/Depth Ratios using Indirect Forced Oscillation Method." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/06545140569991299441.

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碩士<br>淡江大學<br>土木工程學系碩士班<br>97<br>In wind engineering application, although the conventional technique using free oscillation method to obtain flutter derivatives of bridge decks has been mature, the results thus obtained might be sensitive to the test and/or environmental conditions. To improve the reliability of test results, this thesis presents a new identification approach by utilizing indirect forced actuation in the wind tunnel tests. In the experiment setup, the bridge section model is connected to a two-axis actuating device through serial connection of springs. Under the excitation o
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Shen, Chien-Chih, and 沈建置. "Hybrid Methods for the Determination of Modal Damping Ratios." Thesis, 1987. http://ndltd.ncl.edu.tw/handle/03974929831178080905.

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碩士<br>國立臺灣大學<br>應用力學研究所<br>75<br>Substantial effort has been expended in attempts to estimate dynamic response parameters of structures, damping ratios have been estimated with varying degrees of success. A portion of hte effort has been motivated by active research and development of structural integrity monitoring systems. for design purpose, accurate estimates of damping ratios are important. 　　In our work, the spectral shape of the response near the natual frequency is estimated first as the basis for further analysis. Hal-fpower bandwidth and spectral moments are derived fromt he spect
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Tang, Gwo-Yann, and 湯國彥. "A Study on SN Ratios for Smaller-is-better and Larger-is-better Quality Properties of Taguchi Method." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/79345262494136597271.

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碩士<br>國立交通大學<br>工業工程研究所<br>82<br>The basic concept of Taguchi method is that we can iimprove the qualities of products efficiently with low cost by means of parameter design. Although Taguchi method has many advantages in practical application, there are still some drawbacks. For example: 1. The signal to noise ratio (SN) for smaller-is-better (SNs) and larger-is-better (SNL) quality properties only emphasize on u. They can not really reflect the importance of σ2. 2. In the case where u and σ2 conflict, SNs and SNL lose the ability of trading off between u and σ2. The values of the
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Rodiouchkina, Katerina. "Development of a multi-collector inductively coupled plasma massspectrometry method for measurement of stable sulphur isotope ratios in aerosol sulphate." Thesis, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-357614.

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Sulphur stable isotope ratios are useful tracers in geological and environmental studies. They can for example be used to trace the origin of atmospheric sulphate aerosols, because anthropogenic sulphate and natural sulphate have distinguishable δ34S-values (δ34S value of approximately +0 to +8 ‰ for anthropogenic and approximately +12 to +19 ‰ for natural). This is useful for climate modelling research, due to the net cooling effect of aerosol sulphate. In the present study a Nu Plasma II (Nu Instruments) multi collector inductively coupled plasma mass spectrometer (MC-ICP-MS) method for meas
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Mohammed, Mohammed A., B. N. Manktelow, and T. P. Hofer. "Comparison of four methods for deriving hospital standardised mortality ratios from a single hierarchical logistic regression model." 2012. http://hdl.handle.net/10454/6103.

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There is interest in deriving case-mix adjusted standardised mortality ratios so that comparisons between healthcare providers, such as hospitals, can be undertaken in the controversial belief that variability in standardised mortality ratios reflects quality of care. Typically standardised mortality ratios are derived using a fixed effects logistic regression model, without a hospital term in the model. This fails to account for the hierarchical structure of the data - patients nested within hospitals - and so a hierarchical logistic regression model is more appropriate. However, four methods
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St, John Rodney Alan. "Soil testing methods and basic cation saturation ratios of creeping bentgrass greens /." 2005.

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Beaumont, Julia, and Janet Montgomery. "Oral Histories: a simple method of assigning chronological age to isotopic values from human dentine collagen." 2015. http://hdl.handle.net/10454/7172.

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Yes<br>Background: stable isotope ratios of carbon (δ13C) and nitrogen (δ15N) in bone and dentine collagen have been used for over 30 years to estimate palaeodiet, subsistence strategy, breastfeeding duration and migration within burial populations. Recent developments in dentine microsampling allow improved temporal resolution for dietary patterns. Aim: We propose a simple method which could be applied to human teeth to estimate chronological age represented by dentine microsamples in the direction of tooth growth, allowing comparison of dietary patterns between individuals and populations.
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Dong, Bin. "Empirical Likelihood Method for Ratio Estimation." Thesis, 2011. http://hdl.handle.net/10012/5817.

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Empirical likelihood, which was pioneered by Thomas and Grunkemeier (1975) and Owen (1988), is a powerful nonparametric method of statistical inference that has been widely used in the statistical literature. In this thesis, we investigate the merits of empirical likelihood for various problems arising in ratio estimation. First, motivated by the smooth empirical likelihood (SEL) approach proposed by Zhou & Jing (2003), we develop empirical likelihood estimators for diagnostic test likelihood ratios (DLRs), and derive the asymptotic distributions for suitable likelihood ratio statistics under
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Chiou, De-Zeng, and 邱德正. "Using Bootstrap Method to Construct the Confidence Intervals of the Taguchi's Larger-the-Better and Smaller-the-Better Signal-to-Noise Ratios." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/80943939387055293891.

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碩士<br>國立雲林科技大學<br>工業工程與管理研究所碩士班<br>91<br>Signal-to-Noise Ratio(S/N Ratio) is the important measurement of the quality performance in the Taguchi Method, because the purpose of the parameter design is to determine the optimum factor level combination, and it is according to the Signal-to-Noise Ratios, so , it’s very important to estimate the S/N Ratios rationally. However, because of considering the cost、time and the experimental configure, we cannot but use the less samples to estimate the statistic and implement the continuous statistical inference, moreover, the statistical distributions of
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Lin, Jia Long, and 林家隆. "The effect of argon/methane ratios on the properties of hermetically carbon-coated optical fibers prepared by plasma enhanced chemical vapor deposition method." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/32230212942199323117.

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碩士<br>國立中興大學<br>材料工程學研究所<br>93<br>The effect of argon/methane ratios on the properties of hermetically carbon-coated optical fibers prepared by plasma enhanced chemical vapor deposition method is investigated. The flow rate of methane gas is fixed at 9 sccm, and the flow rate of argon gas is set at 0, 6, 12, 18, 24, 30, 36, 42 and 48sccm, respectively. The microstructures, optical property, mechanical property, surface roughness and appearances of carbon coatings are observed and analyzed by Raman scattering spectrum, UV/Vis spectrophotometer, Nanoindentation, atomic force microscope and optic
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Chen, Chia-Chun, and 陳嘉俊. "Green Rating Method for Motor Vehicles." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/95720355335242025628.

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碩士<br>國立交通大學<br>工學院碩士在職專班永續環境科技組<br>96<br>Vehicle exhaust emission is one of the major reasons to cause air pollution and greenhouse gas accumulation. In order to resolve these problems, in addition to establishing stringent standards, green rating of vehicles is an effective strategy. Although the government has implemented a similar vehicle rating, the items considered are primarily adopted from administrative standards, and major factors such as the environmental impacts induced from vehicle exhaust emissions were not assessed. In other countries, several vehicle green rating methods have b
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"Automatic Sampling with the Ratio-of-uniforms Method." Department of Statistics and Mathematics, Abt. f. Angewandte Statistik u. Datenverarbeitung, 1999. http://epub.wu-wien.ac.at/dyn/dl/wp/epub-wu-01_9e0.

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Chen, Hung-Ju, and 陳紅朱. "Inference on Common Odds Ratio with Bayesian Method." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/31707298937591423544.

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Huang, Jin-Hsiang, and 黃晉祥. "Forecasting credit rating using data mining method." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/58379835554405861570.

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碩士<br>國立彰化師範大學<br>企業管理學系<br>95<br>The objective of this study is in developing a reliable credit rating forecasting model for lenders as the important criteria of enterprise risk assessment to reduce the loss resulting from financial distress. We adopt 453 High-Tech companies from TEJ as samples and use 35 financial indices as our input data. This study adopts three measurements, including Support vector machines, logistic model and back-propagation neural networks, to analyze credit rating forecasting; furthermore, we combine them with Genetic Algorithm so as to compare the six different resu
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Chen, Yu Ching, and 陳鈺清. "Application of Taguchi method for the study of optimal Environment Setup Parameters for Machine vision Inspection on the Bearing Points and Contact Ratios of Scraped Surfaces." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/j4775y.

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碩士<br>國立勤益科技大學<br>機械工程系<br>105<br>Scraping is one of the key technologies of machine tool manufacturing and assembly it In machine tool. Assembly, contacting surfaces of assembled parts are scraped in order to make two planes engage with each other more closely. Scraping is a technology using scraping tool to minutely scrap, cut or shovel the surface to correct machining errors. However, the scraping quality is often easy to neglect. In this study, Taguchi method is applied to a machine vision system inspecting the scraped surface to find the optimal environmental set-up when capturing the sur
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Huang, Chih-Min, and 黃志民. "Analytical method studies of determining geniposide and its metabolite genipin in Zhi-Zi : using LC-MS/MS to develop the methods and combine with signal processing techniques to improve the signal-to-noise ratios." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/74479023851380198633.

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博士<br>國立中正大學<br>化學所<br>95<br>The first project of this dissertation is using LC-MS/MS to develop the methods of determining geniposide and its metabolite genipin, and also can combine with microdialysis sampling technique. Zhi-Zi is the fruit of Gardenia. It has been utilized as a Chinese herbal medicine and a source of natural pigment. The representative compounds in this crude drug are iridoid glycosides; geniposide is one of the major constituents. The hydrolytic product of geniposide is genipin. Because geniposide is a polar compound and has a sugar moiety on its structure, hydroxyl grou
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