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Academic literature on the topic 'Criterion of characteristic functions'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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Journal articles on the topic "Criterion of characteristic functions"

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Gneiting, Tilmann. "Kuttner’s problem and a Pólya type criterion for characteristic functions." Proceedings of the American Mathematical Society 128, no. 6 (October 27, 1999): 1721–28. http://dx.doi.org/10.1090/s0002-9939-99-05200-4.

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Trigub, R. M. "A Criterion for a Characteristic Function and a Polyá-Type Criterion for Radial Functions of Several Variables." Theory of Probability & Its Applications 34, no. 4 (January 1990): 738–42. http://dx.doi.org/10.1137/1134097.

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Aubertin, Michel, and Richard Simon. "Un critère de rupture multiaxial pour matériaux fragiles." Canadian Journal of Civil Engineering 25, no. 2 (April 1, 1998): 277–90. http://dx.doi.org/10.1139/l97-092.

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Most brittle materials show little straining at failure and an ultimate strength that depends upon loading geometry. The surface that defines failure in stress space has a characteristic shape that may be defined by an appropriate mathematical criterion. In this paper, the authors present a simple multiaxial criterion formulated from two quadric functions. Under conventional triaxial compression, the MSDP criterion reduces to the Mises-Schleicher criterion at low mean stress and it takes the shape of the conical Nadai-Drucker-Prager criterion at higher mean stress. The MSDP criterion can be expressed from the three principal stresses or from the usual invariantsI1, J2, and J3. It includes four characteristic parameters, each having a particular significance regarding material properties. The validity of the criterion is shown using experimental results taken from the literature on rock, concrete, and grey cast iron.Key words: failure, brittle materials, rock, concrete, cast iron.

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KANG, Sungkook, and Kazuo YOSHIDA. "Criterion Functions and Control Characteristics in Active Vibration Control." Transactions of the Japan Society of Mechanical Engineers Series C 58, no. 552 (1992): 2373–80. http://dx.doi.org/10.1299/kikaic.58.2373.

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WANG, ZAI HUA. "A VERY SIMPLE CRITERION FOR CHARACTERIZING THE CROSSING DIRECTION OF TIME-DELAY SYSTEMS WITH DELAY-DEPENDENT PARAMETERS." International Journal of Bifurcation and Chaos 22, no. 03 (March 2012): 1250048. http://dx.doi.org/10.1142/s0218127412500484.

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In this paper, a very simple criterion has been established for checking the crossing direction of a characteristic root crossing the imaginary axis for a class of time-delay systems with delay-dependent parameters, an important topic both in stability analysis and Hopf bifurcation. The criterion uses two easy-to-obtain functions with clear physical meaning from the critical stability condition and it generalizes a popular result in the literature.

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Sokolov, A. V., and O. N. Zhdanov. "STRICT AVALANCHE CRITERION OF FOUR-VALUED FUNCTIONS AS THE QUALITY CHARACTERISTIC OF CRYPTOGRAPHIC ALGORITHMS STRENGTH." Siberian Journal of Science and Technology 20, no. 2 (2019): 183–90. http://dx.doi.org/10.31772/2587-6066-2019-20-2-183-190.

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Thillaigovindan, N., S. Anita Shanthi, and J. Vadivel Naidu. "New Method for Solving a General Multiple Criteria Decision-Making Problem Under Risk in Fuzzy Environment." International Journal of Information Technology & Decision Making 15, no. 05 (September 2016): 1157–79. http://dx.doi.org/10.1142/s0219622016500279.

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This paper considers a multiple criteria decision-making (MCDM) problem under risk in fuzzy environment in its general form. There are m alternatives which need to be ranked on the basis of a set of n criteria. The alternatives and the criteria are evaluated based on a set of l characteristics. The entire data is presented in the form of interval valued intuitionistic fuzzy soft set of root type. In addition each criterion is assigned a subjective criterion weight based on expert’s evaluation and each characteristic is assigned a probability weight on the basis of decision maker’s knowlege and understanding of the importance of the characteristic. This problem may be called as a MCDM problem under risk in fuzzy environment in its general form. A method for ranking the alternatives using the new score functions, prospect theory and method of determining the optimum criteria weights is explained. An algorithm is developed for this purpose and its working illustrated with a suitable example.

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Vasilyev, Gleb S., Oleg R. Kuzichkin, Dmitriy I. Surzhik, and Igor A. Kurilov. "Algorithms for analysis of stability and dynamic characteristics of signal generators at the physical level in FANET networks." MATEC Web of Conferences 309 (2020): 03019. http://dx.doi.org/10.1051/matecconf/202030903019.

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To ensure the reliability of the physical level of Flying Ad Hoc Networks (FANET), the article substantiates the relevance of the study of stability and dynamic processes of signal formation and processing paths in the terminal and intermediate network equipment. The limitations of the known methods of the theory of automatic control, which make it difficult to perform the analysis of essentially nonlinear high-order signal generators, are shown. To analyze the stability of such formations proposed algorithm based on the use of the Nyquist criterion and approximation of the characteristic polynomial of a device by continuous piecewise functions; to analyze the dynamic characteristics of the algorithm based on spectral method of the input signal approximation and the frequency characteristics of a device by continuous piecewise functions.

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Sung, Soo Hak, Seongtaek Chee, and Choonsik Park. "Global avalanche characteristics and propagation criterion of balanced Boolean functions." Information Processing Letters 69, no. 1 (January 1999): 21–24. http://dx.doi.org/10.1016/s0020-0190(98)00184-7.

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Kang, Sungkook, and Kazuo Yoshida. "Criterion Functions and Their Control Characteristics for Active Vibration Control." JSME international journal. Ser. C, Dynamics, control, robotics, design and manufacturing 37, no. 3 (1994): 456–61. http://dx.doi.org/10.1299/jsmec1993.37.456.

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Dissertations / Theses on the topic "Criterion of characteristic functions"

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Gaerke, Tiffani M. "Characteristic Functions and Bernoulli-Gaussian Impulsive Noise Channels." University of Akron / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=akron1408040080.

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Yu, Jung-Suk. "Essays on Fine Structure of Asset Returns, Jumps, and Stochastic Volatility." ScholarWorks@UNO, 2006. http://scholarworks.uno.edu/td/431.

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There has been an on-going debate about choices of the most suitable model amongst a variety of model specifications and parameterizations. The first dissertation essay investigates whether asymmetric leptokurtic return distributions such as Hansen's (1994) skewed tdistribution combined with GARCH specifications can outperform mixed GARCH-jump models such as Maheu and McCurdy's (2004) GARJI model incorporating the autoregressive conditional jump intensity parameterization in the discrete-time framework. I find that the more parsimonious GJR-HT model is superior to mixed GARCH-jump models. Likelihood-ratio (LR) tests, information criteria such as AIC, SC, and HQ and Value-at-Risk (VaR) analysis confirm that GJR-HT is one of the most suitable model specifications which gives us both better fit to the data and parsimony of parameterization. The benefits of estimating GARCH models using asymmetric leptokurtic distributions are more substantial for highly volatile series such as emerging stock markets, which have a higher degree of non-normality. Furthermore, Hansen's skewed t-distribution also provides us with an excellent risk management tool evidenced by VaR analysis. The second dissertation essay provides a variety of empirical evidences to support redundancy of stochastic volatility for SP500 index returns when stochastic volatility is taken into account with infinite activity pure Lévy jumps models and the importance of stochastic volatility to reduce pricing errors for SP500 index options without regard to jumps specifications. This finding is important because recent studies have shown that stochastic volatility in a continuous-time framework provides an excellent fit for financial asset returns when combined with finite-activity Merton's type compound Poisson jump-diffusion models. The second essay also shows that stochastic volatility with jumps (SVJ) and extended variance-gamma with stochastic volatility (EVGSV) models perform almost equally well for option pricing, which strongly imply that the type of Lévy jumps specifications is not important factors to enhance model performances once stochastic volatility is incorporated. In the second essay, I compute option prices via improved Fast Fourier Transform (FFT) algorithm using characteristic functions to match arbitrary log-strike grids with equal intervals with each moneyness and maturity of actual market option prices.

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Dutschke, Cynthia F. (Cynthia Fleming). "The Characteristics and Properties of the Threshold and Squared-Error Criterion-Referenced Agreement Indices." Thesis, North Texas State University, 1988. https://digital.library.unt.edu/ark:/67531/metadc331415/.

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Educators who use criterion-referenced measurement to ascertain the current level of performance of an examinee in order that the examinee may be classified as either a master or a nonmaster need to know the accuracy and consistency of their decisions regarding assignment of mastery states. This study examined the sampling distribution characteristics of two reliability indices that use the squared-error agreement function: Livingston's k^2(X,Tx) and Brennan and Kane's M(C). The sampling distribution characteristics of five indices that use the threshold agreement function were also examined: Subkoviak's Pc. Huynh's p and k. and Swaminathan's p and k. These seven methods of calculating reliability were also compared under varying conditions of sample size, test length, and criterion or cutoff score. Computer-generated data provided randomly parallel test forms for N = 2000 cases. From this, 1000 samples were drawn, with replacement, and each of the seven reliability indices was calculated. Descriptive statistics were collected for each sample set and examined for distribution characteristics. In addition, the mean value for each index was compared to the population parameter value of consistent mastery/nonmastery classifications. The results indicated that the sampling distribution characteristics of all seven reliability indices approach normal characteristics with increased sample size. The results also indicated that Huynh's p was the most accurate estimate of the population parameter, with the smallest degree of negative bias. Swaminathan's p was the next best estimate of the population parameter, but it has the disadvantage of requiring two test administrations, while Huynh's p index only requires one administration.

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Diaz-Vargas, Javier Arturo 1952. "On zeros of characteristic p zeta functions." Diss., The University of Arizona, 1996. http://hdl.handle.net/10150/290585.

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The location and multiplicity of the zeros of zeta functions encode interesting arithmetic information. We study characteristic p zeta functions of Carlitz and Goss. We present a simpler proof of the fact that "non-trivial" zeros of a characteristic p zeta function satisfy Goss' analogue of the Riemann Hypothesis for F(q)[T]. We also prove simplicity of these zeros, and give partial results for F(q)[T] where q is not necessarily prime. Then we focus on "trivial" zeros, but for characteristic p zeta functions for general function fields over finite fields. Here, we prove a theorem on zeros at negative integers for characteristic p zeta functions, showing more vanishing than that suggested by naive analogies. We also compute some concrete examples providing the extra vanishing, when the class number is more than one. Finally, we give an application of these results related to the non-vanishing of certain class group components for cyclotomic function fields. In particular, we give examples of function fields, where all the primes of degree more than two are "irregular", in the sense of the Drinfeld-Hayes cyclotomic theory.

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Chevyrev, Ilya. "Characteristic functions of path signatures and applications." Thesis, University of Oxford, 2015. https://ora.ox.ac.uk/objects/uuid:3dd5e063-bde0-434f-a781-61d3fe22aaa1.

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The main object of study in this work is the extension of the classical characteristic function to the setting of path signatures. Our first fundamental result exhibits the following geometric interpretation: the path signature is completely determined by the development of the path into compact Lie groups. This faithful representation of the signature is the primary tool we use to define and study the characteristic function. Our investigation of the characteristic function can be divided into two parts. First, we employ the characteristic function to study the expected signature of a path as the natural generalisation of the moments of a real random variable. In this direction, we provide a solution to the moment problem, and study analyticity properties of the characteristic function. In particular, we solve the moment problem for signatures arising from families of Gaussian and Markovian rough paths. Second, we study the characteristic function in relation to the solution map of a rough differential equation. The connection stems from the fact that the signature of a geometric rough path completely determines the path's role as a driving signal. As an application, we demonstrate that the characteristic function can be used to determine weak convergence of flows arising from rough differential equations. Along the way, we develop tools to study càdlàg processes as rough paths and to determine tightness in p-variation topologies of random walks. As a consequence, we provide a classification of Lévy processes possessing sample paths of finite p-variation and determine a Lévy-Khintchine formula for the characteristic function of the signature of a Lévy process.

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Binkowski, Karol Patryk. "Pricing of European options using empirical characteristic functions." Phd thesis, Australia : Macquarie University, 2008. http://hdl.handle.net/1959.14/28623.

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Thesis (PhD)--Macquarie University, Division of Economic and Financial Studies, Dept. of Statistics, 2008.
Bibliography: p. 73-77.
Introduction -- Lévy processes used in option pricing -- Option pricing for Lévy processes -- Option pricing based on empirical characteristic functions -- Performance of the five models on historical data -- Conclusions -- References -- Appendix A. Proofs -- Appendix B. Supplements -- Appendix C. Matlab programs.
Pricing problems of financial derivatives are among the most important ones in Quantitative Finance. Since 1973 when a Nobel prize winning model was introduced by Black, Merton and Scholes the Brownian Motion (BM) process gained huge attention of professionals professionals. It is now known, however, that stock market log-returns do not follow the very popular BM process. Derivative pricing models which are based on more general Lévy processes tend to perform better. --Carr & Madan (1999) and Lewis (2001) (CML) developed a method for vanilla options valuation based on a characteristic function of asset log-returns assuming that they follow a Lévy process. Assuming that at least part of the problem is in adequate modeling of the distribution of log-returns of the underlying price process, we use instead a nonparametric approach in the CML formula and replaced the unknown characteristic function with its empirical version, the Empirical Characteristic Functions (ECF). We consider four modifications of this model based on the ECF. The first modification requires only historical log-returns of the underlying price process. The other three modifications of the model need, in addition, a calibration based on historical option prices. We compare their performance based on the historical data of the DAX index and on ODAX options written on the index between the 1st of June 2006 and the 17th of May 2007. The resulting pricing errors show that one of our models performs, at least in the cases considered in the project, better than the Carr & Madan (1999) model based on calibration of a parametric Lévy model, called a VG model. --Our study seems to confirm a necessity of using implied parameters, apart from an adequate modeling of the probability distribution of the asset log-returns. It indicates that to precisely reproduce behaviour of the real option prices yet other factors like stochastic volatility need to be included in the option pricing model. Fortunately the discrepancies between our model and real option prices are reduced by introducing the implied parameters which seem to be easily modeled and forecasted using a mixture of regression and time series models. Such approach is computationaly less expensive than the explicit modeling of the stochastic volatility like in the Heston (1993) model and its modifications.
Mode of access: World Wide Web.
x, 111 p. ill., charts

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Sagdicoglu, Serhat. "Cryptological Viewpoint Of Boolean Functions." Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/1082403/index.pdf.

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Boolean functions are the main building blocks of most cipher systems. Various aspects of their cryptological characteristics are examined and investigated by many researchers from different fields. This thesis has no claim to obtain original results but consists in an attempt at giving a unified survey of the main results of the subject. In this thesis, the theory of boolean functions is presented in details, emphasizing some important cryptological properties such as balance, nonlinearity, strict avalanche criterion and propagation criterion. After presenting many results about these criteria with detailed proofs, two upper bounds and two lower bounds on the nonlinearity of a boolean function due to Zhang and Zheng are proved. Because of their importance in the theory of boolean functions, construction of Sylvester-Hadamard matrices are shown and most of their properties used in cryptography are proved. The Walsh transform is investigated in detail by proving many properties. By using a property of Sylvester-Hadamard matrices, the fast Walsh transform is presented and its application in finding the nonlinearity of a boolean function is demonstrated. One of the most important classes of boolean functions, so called bent functions, are presented with many properties and by giving several examples, from the paper of Rothaus. By using bent functions, relations between balance, nonlinearity and propagation criterion are presented and it is shown that not all these criteria can be simultaneously satisfied completely. For this reason, several constructions of functions optimizing these criteria which are due to Seberry, Zhang and Zheng are presented.

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Alcantara, Helene Deborah-Lynne. "Characteristic Memory Functions in Subtypes of Arithmetic Disabled Children." Thesis, University of North Texas, 1994. https://digital.library.unt.edu/ark:/67531/metadc277591/.

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Song, Qiang. "Non-euler-lagrangian pareto-optimality conditions for dynamic multiple-criterion decision problems." Diss., Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/24920.

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Wang, Wen-Chyi. "Regularized variable selection in proportional hazards model using area under receiver operating characteristic curve criterion." College Park, Md.: University of Maryland, 2009. http://hdl.handle.net/1903/9972.

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Thesis (Ph. D.) -- University of Maryland, College Park, 2009.
Thesis research directed by: Dept. of Mathematics. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

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Books on the topic "Criterion of characteristic functions"

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Alpay, Daniel, and Victor Vinnikov, eds. Characteristic Functions, Scattering Functions and Transfer Functions. Basel: Birkhäuser Basel, 2010. http://dx.doi.org/10.1007/978-3-0346-0183-2.

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Multivariate characteristic and correlation functions. Berlin: De Gruyter, 2013.

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Stépán, G. Retarded dynamical systems: Stability and characteristic functions. Burnt Mill, Harlow, Essex, England: Longman Scientific & Technical, 1989.

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Kuzhel, A. Characteristic functions and models of nonself-adjoint operators. Dordrecht: Kluwer Academic, 1996.

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Kuzhel, A. Characteristic Functions and Models of Nonself-Adjoint Operators. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-009-0183-4.

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1955-, Lin Yizhong, and ebrary Inc, eds. Dual sets of envelopes and characteristic regions of quasi-polynomials. Hackensack, NJ: World Scientific, 2009.

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Characteristic based planning with mySAP SCM: Scenarios, processes, and functions. Berlin: Springer, 2005.

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Evelina, Rossi Maria, and SpringerLink (Online service), eds. Hilbert Functions of Filtered Modules. Berlin, Heidelberg: Springer-Verlag Berlin Heidelberg, 2010.

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Iarrobino, Anthony A. Associated graded algebra of a Gorenstein Artin algebra. Providence, RI: American Mathematical Society, 1994.

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Herzog, Bernd. Kodaira-Spencer maps in local algebra. Berlin: Springer-Verlag, 1994.

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Book chapters on the topic "Criterion of characteristic functions"

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Zhang, Xian-Mo, and Yuliang Zheng. "GAC — the Criterion for Global Avalanche Characteristics of Cryptographic Functions." In J.UCS The Journal of Universal Computer Science, 320–37. Berlin, Heidelberg: Springer Berlin Heidelberg, 1996. http://dx.doi.org/10.1007/978-3-642-80350-5_30.

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Fristedt, Bert, and Lawrence Gray. "Characteristic Functions." In A Modern Approach to Probability Theory, 209–40. Boston, MA: Birkhäuser Boston, 1997. http://dx.doi.org/10.1007/978-1-4899-2837-5_13.

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Karr, Alan F. "Characteristic Functions." In Springer Texts in Statistics, 163–82. New York, NY: Springer New York, 1993. http://dx.doi.org/10.1007/978-1-4612-0891-4_7.

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Huzak, Miljenko. "Characteristic Functions." In International Encyclopedia of Statistical Science, 238–39. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-04898-2_636.

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Koralov, Leonid, and Yakov G. Sinai. "Characteristic Functions." In Theory of Probability and Random Processes, 119–30. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-540-68829-7_9.

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Capiński, Marek, and Tomasz Zastawniak. "Characteristic Functions." In Problem Books in Mathematics, 213–32. New York, NY: Springer New York, 2001. http://dx.doi.org/10.1007/978-0-387-21659-1_12.

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Borovkov, Alexandr A. "Characteristic Functions." In Probability Theory, 153–84. London: Springer London, 2013. http://dx.doi.org/10.1007/978-1-4471-5201-9_7.

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Sinai, Yakov G. "Characteristic Functions." In Probability Theory, 120–26. Berlin, Heidelberg: Springer Berlin Heidelberg, 1992. http://dx.doi.org/10.1007/978-3-662-02845-2_14.

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Kuzhel, A. "Characteristic Functions." In Characteristic Functions and Models of Nonself-Adjoint Operators, 33–109. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-009-0183-4_3.

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Gut, Allan. "Characteristic Functions." In Springer Texts in Statistics, 157–200. New York, NY: Springer New York, 2012. http://dx.doi.org/10.1007/978-1-4614-4708-5_4.

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Conference papers on the topic "Criterion of characteristic functions"

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Yoshimura, Masataka, and Takatoshi Nishikawa. "Flexible Optimization of Machine Products Considering the Working Environment." In ASME 1996 Design Engineering Technical Conferences and Computers in Engineering Conference. American Society of Mechanical Engineers, 1996. http://dx.doi.org/10.1115/96-detc/dac-1057.

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Abstract In order to obtain product designs which enhance the flexibility for change in the working environment of the product, a flexible design optimization method is proposed in which any change is clearly evaluated at the design stage. Here, a criterion of maximization of the flexibility for the product working environment is added to the conventional criteria such as the product performance and the manufacturing cost and a multiobjective optimization problem is formulated. The influence that enhancing flexibility has on the other characteristics is integratedly evaluated by the tradeoff analysis of the Pareto optimum solution set. Then, the preference structure of the decision maker is formulated by the preference function for each evaluative characteristic. The preference functions are interactively modified based on the tradeoff analysis between the evaluative characteristics. The solution most sufficiently reflecting the preference structure of the decision maker is finally determined as the design solution.

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Medenica, M. S., and D. Lj Debeljkovic. "A Short Note on Stability of Linear Time Delay Systems." In ASME 8th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2006. http://dx.doi.org/10.1115/esda2006-95055.

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Our research on stability criteria for linear systems with time delay in a frequency domain has brought in a new stability criterion that belongs to the group of graph-analytical stability criteria. Via the theory of functions with a complex variable, this criterion is based upon Cauchy’s theorem of argument and condition that for frequency ω varying from −∞ to +∞ the argument of function f*(jω,ejωτ) has positive change. In solution, as a graphic interpretation in the f* - plane, a spiral curve is obtained, which possesses some characteristics crucial for the stability of a system with time delay. Through given examples, simplicity and facility of criteria application to different cases of systems are shown.

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Aluko, O. "A Parametric Study on Failure of Pin-Loaded Unidirectional-Woven Composite Joints." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-63961.

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An analysis was performed to predict the failure load of unidirectional and woven pinned loaded composite joints using the characteristic curve model. The characteristic dimensions used to determine the characteristic curve were evaluated from stress functions without experimental tests. A parametric study was carried out for different coefficient of friction ranging between 0 and 0.15 to evaluate the effect of friction on joints failure using Tsai-Wu failure criterion along the characteristic curve. A comparison of analytical results with the available experimental data showed that the friction coefficient of 0.05 generally gave the best prediction for the joint configurations evaluated.

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Aluko, Olanrewaju. "Effect of Graphene on Mechanical Performance of Pin-Loaded Circular Hole in Laminated Composites." In ASME 2018 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/imece2018-87566.

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An analytical modeling was performed to investigate the effect of Nano filler on the mechanical performance of carbon fiber reinforced composite joints using the characteristic curve method. The joints were prepared from carbon fiber reinforced laminated plates with and without graphene nanoplatelet (GNP) and the characteristic dimensions used to determine the characteristic curve were evaluated from stress functions without experimental tests. The load-bearing capacity of the joints were carried out using different coefficient of friction and Yamada-Sun failure criterion along the characteristic curve. The evaluated results showed that the infusion of graphene nanoplatelet into the epoxy matrix of fiber reinforced composite plate increases the failure load of the composite joints.

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Da, Z. J., J. P. Sadler, and I. S. Jawahir. "Multiple Criteria Optimization of Finish Turning Operations Based on a Hybrid Model." In ASME 1996 Design Engineering Technical Conferences and Computers in Engineering Conference. American Society of Mechanical Engineers, 1996. http://dx.doi.org/10.1115/96-detc/dac-1480.

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Abstract In this paper a multiple criteria optimization method is used to achieve the optimum selection of cutting conditions and tool inserts for finish turning operations. The utility function which maps criterion vectors into the real line is constructed based on tool-life and material removal rate. This unified objective function serves as an arbiter balancing the values of the individual objective functions. Different formats of utility functions are developed and their physical significance is analyzed. Other major machining performance characteristics such as surface roughness, cutting force, power requirements and chip breakability are used as constraints to define acceptable limits on these criteria, along with the limits on the ranges of the process variables. A hybrid process model which uses combinations of the metal cutting theories and an expandable database of experimental results is used to describe the interrelationships between the machining performance criteria and the process variables. Nonlinear programming techniques coupled with numerical methods for data interpolation are then applied to identify optimum process conditions for a given tool insert. Furthermore, for any specified application a cutting tool can be selected through comparative analyses. A sample case for a typical tool insert was studied and the results are presented.

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Chen, Jian, Jun Hong, Jinhua Zhang, Linbo Zhu, and Zhigang Liu. "Micro-Contact Models for Metallic Line-Contact Based on Measured Surface Profile." In ASME 2017 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/imece2017-70472.

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In order to study the dry rough line-contact mechanism between two longitudinally rough metallic surfaces, the measured profile is mathematically described by quadratic functions for the application of the existing micro-contact models. The mechanical parameters are determined using the different approximating criteria. Next, based on these deterministic parameters, different micro-contact models are employed and extended to predict the characteristics of a line-contact. Comparison of different theoretical calculation results reveals that the greater maximum values of the contact deformation and the ratio of real to nominal contact area are predicted by the Hertz model as compared to the micro-contact models considering the elastoplastic deformation, and that the KE (Kogut and Etsion) and JG (Jackson and Green) models predict closer results. It is also found that when the rough surfaces are described by quadratic functions according to the same area criterion or same root mean square (RMS) criterion, the line-contact responses between them prescribed by any micro-contact models have the same tendency.

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Yoshimura, Masataka, Kazuhiro Izui, and Shigeaki Komori. "Optimization of Machine System Designs Using Hierarchical Decomposition Based on Criteria Influence." In ASME 2002 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/detc2002/dac-34042.

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Machine product designs routinely have so many mutually related characteristics that common design optimization methods often result in an unsatisfactory local optimum solution. In order to overcome this problem, this paper proposes a design optimization method based on the clarification of the conflicting and cooperative relationships among the characteristics. First of all, each performance characteristic is divided into simpler basic characteristics according to its structure. Next, the relationships among the basic characteristics are systematically identified and clarified. Then, based on this clarification, the optimization problem is expressed using hierarchical constructions of these basic characteristics and design variables related to the most basic characteristics. Finally, an optimization strategy and detailed hierarchical optimization procedures are constructed, after clarifying the influence levels of each basic characteristic upon the objective functions and setting a core characteristic for the product under consideration. Here, optimizations are sequentially repeated starting with the basic optimal unit group at the bottom hierarchical level and proceeding to higher levels by the hierarchical genetic algorithms. Then, the Pareto optimum solutions at the top hierarchical level are obtained. With the proposed optimization methods, optimization can be more easily applied after the optimization problems have been simplified by decomposition. In doing so, the volume of design spaces for each optimization is reduced, while useful and unique rules and laws may be uncovered. The optimization strategy expressed by the hierarchical structures can be used for the optimization of similar product designs, which realize these breakthroughs, yielding improved product performances. The proposed method is applied to a machine-tool structural model.

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Koh, Sung K., and G. K. Ananthasuresh. "Design of HP Models of Proteins by Energy Gap Criterion Using Continuous Modeling and Optimization." In ASME 2004 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/detc2004-57598.

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The sequence of 20 types of amino acid residues in a heteropolymer chain of a protein is believed to be the basis for the 3-D conformation (folded structure) that a protein assumes to serve its functions. We present a deterministic optimization method to design the sequence of a simplified model of proteins for a desired conformation. A design methodology developed for the topology optimization of compliant mechanisms is adapted here by converting the discrete combinatorial problem of protein sequence design to a continuous optimization problem. It builds upon our recent work which used a minimum energy criterion on a deterministic approach to protein design using continuous models. This paper focuses on the energy gap criterion, which is argued to be one of the most important characteristics determining the stable folding of a protein chain. The concepts, methodology, and illustrative examples are presented using HP models of proteins where only two types (H: hydrophobic and P: polar) of monomers are considered instead of 20. The highlight of the method presented in this paper is the drastic reduction in computational costs.

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Oizumi, Kazuya, and Naochika Tokuoka. "Evaluation Method of Design Products Based on Eco-Efficiency." In ASME 2007 International Mechanical Engineering Congress and Exposition. ASMEDC, 2007. http://dx.doi.org/10.1115/imece2007-41686.

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Evaluation methods of Environmental burdens have been improved. Some of those methods indicate intensity of environmental burdens in money unit to make them comparable to production cost. Moreover, from sustainability point of view, improvement of functions is as important as reduction of environmental burdens. Namely, environmental burdens and functions have to be balanced. Therefore, we aimed to develop the evaluation method of design products that is able to optimize balance between them. We had developed the evaluation method of environmental burdens, which indicates potential of economical loss caused by environmental impacts and defined it as Societal Cost. This is used for evaluation of environmental burden. In this paper, we improve this method by adding the Function Value. To compare the value of functions with environmental burdens, every evaluation criterion has to be integrated in single score, and it is desired to be money unit. We derived value of functions by using the information theory and defined it as Function Value. Eco-Efficiency Index evaluates products. This is based on the concept of Eco-Efficiency and calculated by dividing Function Value by Societal Cost. Societal Cost: Pollutants cause many environmental impacts and many kinds of losses through their lifetimes, and most of them can not be converted into money except the loss of productivity. Societal Cost indicates the social loss of productivity by the decrease of human health caused by the increase of disease or disaster originates on emission of pollutants. Function Value: To evaluate products’ value in single score, value of each functions existing in product has to be quantified and integrated. The information theory is applied for this method. Amount of information of each function is derived from probability of satisfying consumer. However, functions have different importance. Therefore, amounts of information of functions are added up after weighted by Relative Importance of each function, which is determined by using QFDE. We defined it as Integrated Amount of Information. It is also important to think the span of utilization. To express the relation between product’s value and time in use, three types of depreciation methods are applied. They should be chosen in accordance with aging characteristics of product. Eco-Efficiency Index: Eco-Efficiency Index is defined as Function Value divided by Societal Cost. This definition is based on the concept of Eco-Efficiency advocated world wide, which mean obtained value per unit amount of environmental burden.

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Wesołowski, Mariusz, Krzysztof Blacha, and Piotr Barszcz. "Multi-Criteria Analysis in Assessment of the Degree of Degradation Pavement Elements Functional Airports Made of Cement Concrete." In Environmental Engineering. VGTU Technika, 2017. http://dx.doi.org/10.3846/enviro.2017.125.

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An important factor that affects the safety of flight operations is the proper management of airports, which should be based on the obtained in systematic way information about the state of the surface of the functional elements. One of the characteristic quantities of the technical condition of airport indicator is the assessment of the degree of degradation. It should be noted that the degradation is a slow process extended in time and is the lowering of the properties of the structure by external influences, which in turn generates the changes in their structure. Rating degrade surface should be conducted periodically, which period shall be estimated on the basis of information obtained from the process of the operation of aircraft. Demotions surface is determined on the basis of the type and quantity survey found damage and made repairs. The basis for evaluating the degree of surface degradation is to obtain data from surveys conducted using the method of visual and inventory of them. Research by visual method, despite its apparent simplicity, it is difficult to implement. Qualification of damage or repairs to the appropriate group is often not clear, and therefore the inventory process is described in the documentation of quality management system. The multi-criteria analysis is a method of evaluating the weighted supporting estimating the degree of degradation airfield pavements based on data obtained through inspections performed. Its base is included in the determination of a number of criteria for the selection variant, taking into account different weights to each criterion. The value of the indicator characterizing the degree of surface degradation in relation to estimated criteria allows you to schedule the necessary resources needed to carry out repairs and rational planning of repairs.

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Reports on the topic "Criterion of characteristic functions"

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Zhao, Ying, and George Karypis. Soft Clustering Criterion Functions for Partitional Document Clustering. Fort Belvoir, VA: Defense Technical Information Center, May 2004. http://dx.doi.org/10.21236/ada439425.

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Paulson, A. S., Ho-Ling Hwang, and J. L. Bryant. Goodness of Fit Based on Integrated Squared Errors in Characteristic Functions or Densities. Fort Belvoir, VA: Defense Technical Information Center, January 1986. http://dx.doi.org/10.21236/ada179027.

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Bryant, J. L., and A. S. Paulson. Goodness-of-Fit Based on Integrated Squared Discrepancies Between Sample and Population Characteristic Functions,. Fort Belvoir, VA: Defense Technical Information Center, January 1986. http://dx.doi.org/10.21236/ada178763.

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Villez, Kris. Computation and illustration of the generalized order restricted criterion (GORIC) for shape constrained spline functions. Office of Scientific and Technical Information (OSTI), September 2020. http://dx.doi.org/10.2172/1659607.

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Jalil, Yorschua, and Ruvistay Gutierrez. Myokines secretion and their role in critically ill patients. A scoping review protocol. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, September 2021. http://dx.doi.org/10.37766/inplasy2021.9.0048.

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Review question / Objective: 1-How and by which means stimulated muscle from critically ill patients can liberate myokines?, 2-Which are the main characteristics of the critically ill population studied and if some of these influenced myokine´s secretion?, 5-Can myokines exert local or distant effects in critically ill patients?, 5-Which are the potential effects of myokines in critically ill patients? Eligibility criteria: Participants and context: We will include primary studies (randomized or non-randomized trials, observational studies, case series or case report) that consider hospitalized critically ill adult patients (18 years or older) in risk for developing some degree of neuromuscular disorders such as ICU-AW, diaphragmatic dysfunction, or muscle weakness, therefore the specific setting will be critical care. Concept: This review will be focused on studies regarding the secretion or measure of myokines or similar (exerkines, cytokines or interleukin) by any mean of muscle activation or muscle contraction such as physical activity, exercise or NMES, among others. The latter strategies must be understood as any mean by which muscle, and there for myocytes, are stimulated as result of muscle contraction, regardless of the frequency, intensity, time of application and muscle to be stimulated (upper limb, lower limb, thoracic or abdominal muscles). We also will consider myokine´s effects, local or systemic, over different tissues in terms of their structure or function, such as myocytes function, skeletal muscle mass and strength, degree of muscle wasting or myopathies, among others.

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Carney, Nancy, Tamara Cheney, Annette M. Totten, Rebecca Jungbauer, Matthew R. Neth, Chandler Weeks, Cynthia Davis-O'Reilly, et al. Prehospital Airway Management: A Systematic Review. Agency for Healthcare Research and Quality (AHRQ), June 2021. http://dx.doi.org/10.23970/ahrqepccer243.

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Objective. To assess the comparative benefits and harms across three airway management approaches (bag valve mask [BVM], supraglottic airway [SGA], and endotracheal intubation [ETI]) by emergency medical services in the prehospital setting, and how the benefits and harms differ based on patient characteristics, techniques, and devices. Data sources. We searched electronic citation databases (Ovid® MEDLINE®, CINAHL®, the Cochrane Central Register of Controlled Trials, the Cochrane Database of Systematic Reviews, and Scopus®) from 1990 to September 2020 and reference lists, and posted a Federal Register notice request for data. Review methods. Review methods followed Agency for Healthcare Research and Quality Evidence-based Practice Center Program methods guidance. Using pre-established criteria, studies were selected and dual reviewed, data were abstracted, and studies were evaluated for risk of bias. Meta-analyses using profile-likelihood random effects models were conducted when data were available from studies reporting on similar outcomes, with analyses stratified by study design, emergency type, and age. We qualitatively synthesized results when meta-analysis was not indicated. Strength of evidence (SOE) was assessed for primary outcomes (survival, neurological function, return of spontaneous circulation [ROSC], and successful advanced airway insertion [for SGA and ETI only]). Results. We included 99 studies (22 randomized controlled trials and 77 observational studies) involving 630,397 patients. Overall, we found few differences in primary outcomes when airway management approaches were compared. • For survival, there was moderate SOE for findings of no difference for BVM versus ETI in adult and mixed-age cardiac arrest patients. There was low SOE for no difference in these patients for BVM versus SGA and SGA versus ETI. There was low SOE for all three comparisons in pediatric cardiac arrest patients, and low SOE in adult trauma patients when BVM was compared with ETI. • For neurological function, there was moderate SOE for no difference for BVM compared with ETI in adults with cardiac arrest. There was low SOE for no difference in pediatric cardiac arrest for BVM versus ETI and SGA versus ETI. In adults with cardiac arrest, neurological function was better for BVM and ETI compared with SGA (both low SOE). • ROSC was applicable only in cardiac arrest. For adults, there was low SOE that ROSC was more frequent with SGA compared with ETI, and no difference for BVM versus SGA or BVM versus ETI. In pediatric patients there was low SOE of no difference for BVM versus ETI and SGA versus ETI. • For successful advanced airway insertion, low SOE supported better first-pass success with SGA in adult and pediatric cardiac arrest patients and adult patients in studies that mixed emergency types. Low SOE also supported no difference for first-pass success in adult medical patients. For overall success, there was moderate SOE of no difference for adults with cardiac arrest, medical, and mixed emergency types. • While harms were not always measured or reported, moderate SOE supported all available findings. There were no differences in harms for BVM versus SGA or ETI. When SGA was compared with ETI, there were no differences for aspiration, oral/airway trauma, and regurgitation; SGA was better for multiple insertion attempts; and ETI was better for inadequate ventilation. Conclusions. The most common findings, across emergency types and age groups, were of no differences in primary outcomes when prehospital airway management approaches were compared. As most of the included studies were observational, these findings may reflect study design and methodological limitations. Due to the dynamic nature of the prehospital environment, the results are susceptible to indication and survival biases as well as confounding; however, the current evidence does not favor more invasive airway approaches. No conclusion was supported by high SOE for any comparison and patient group. This supports the need for high-quality randomized controlled trials designed to account for the variability and dynamic nature of prehospital airway management to advance and inform clinical practice as well as emergency medical services education and policy, and to improve patient-centered outcomes.

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