Tesi sul tema "Matching rates"
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Furlan, Benjamin, Martin Gächter, Bob Krebs e Harald Oberhofer. "Democratization and real exchange rates". Wiley, 2016. http://dx.doi.org/10.1111/sjpe.12088.
Olsen, Karl R. "Matching military skills to civilian jobs : does military training enhance veteran's civilian wage rates? /". Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1995. http://handle.dtic.mil/100.2/ADA295241.
Thesis advisor(s): Stephen L. Mehay, Julie A. Dougherty. "March 1995." Includes bibliographical references. Also available online.
Chen, Hanyi. "Probabilistic matching systems : stability, fluid and diffusion approximations and optimal control". Thesis, University of Edinburgh, 2015. http://hdl.handle.net/1842/10570.
Oliveira, Gabriela Barbosa Sobral de. "The evolutionary origins of impedance-matching hearing in Archosauria". Doctoral thesis, Humboldt-Universität zu Berlin, Lebenswissenschaftliche Fakultät, 2014. http://dx.doi.org/10.18452/17065.
Impedance-matching hearing is considered an important refinement of the auditory system of tetrapods because it reduces energy loss during sound transmission. Anatomically, it is characterized by the sub-division of the metotic foramen into a posterior vagus foramen and an anterior fenestra pseudorotunda. Impedance-matching hearing has evolved independently in several tetrapod groups including archosaurs and although it has been suggested that it represents a homoplasy, this hypothesis has never been tested. Therefore, 17 braincase characters were coded for 111 taxa and mapped on an informal supertree. Optimization of the characters revealed that the fenestra pseudorotunda appeared eight times independently in Archosauria, with five reversals. While this character is plastic in dinosaurs, it appeared only once in pseudosuchians. A tree-shape analysis revealed that pseudosuchians had six shifts in diversification rates, while dinosaurs had seven. Of these, only ornithischian ones are correlated to the appearance of impedance-matching hearing. Many of the overall state changes occur at the origin of major dinosaurian clades, but for pseudosuchians they are concentrated prior to the origin of Crocodyliformes and at the origin of Notosuchia and Thalattosuchia. The overall number of correspondences between character state changes and shifts in diversification rates is higher for dinosaurs, whereas in Pseudosuchia only Mesoeucrocodylia has a similar amount. It is thus possible to conclude that impedance-matching hearing is not homologous for archosaurs, and that it cannot be considered a key innovation triggering diversification. However, it may have played some role in ornithischian diversification. In general, the braincase anatomy of dinosaurs is more plastic than that of pseudosuchians. The abutting of the pterygo-quadrate complex against the lateral braincase wall was a strong anatomical constraint for crocodyliforms broken only by notosuchians and thalatosuchians.
Berry, Meredith Steele. "Reinforcer Magnitude and Resistance to Change of Forgetting Functions and Response Rates". DigitalCommons@USU, 2012. https://digitalcommons.usu.edu/etd/1269.
Subramanian, Shiva Shankar [Verfasser], Andreas [Akademischer Betreuer] Herkersdorf, Ulf [Gutachter] Schlichtmann e Andreas [Gutachter] Herkersdorf. "Memory Efficient Signature Matching in Deep Packet Inspection Applications at Line Rates / Shiva Shankar Subramanian ; Gutachter: Ulf Schlichtmann, Andreas Herkersdorf ; Betreuer: Andreas Herkersdorf". München : Universitätsbibliothek der TU München, 2019. http://d-nb.info/1202921906/34.
Begeot, Jocelyn. "Autour de la stabilité de différents modèles d'appariements aléatoires". Electronic Thesis or Diss., Université de Lorraine, 2022. http://www.theses.fr/2022LORR0201.
Stochastic matching models represent many concrete stochastic systems in which elements of different classes are matched according to specified compatibility rules. For example, we can cite systems dedicated to organs allocation, job search sites, housing allocation programs, etc. Such models are typically associated to a triplet of elements: a connected graph, called compatibility graph, whose vertices represent the classes of elements that can enter the system and whose edges connect two compatible classes, amatching policy which decides the matches to be concretely executed, in case of multiple choices, and an arrival rate according to which the elements enter within it. In this thesis, we consider generalized graphs, meaning that we allow the matching of two elements of the same class, and we therefore extend to this framework some results already known in the case of simple graphs.The stability of a system governed by a matching model is a very important property. It ensures that the admissions within the system under study, are regulated, so that the elements do not accumulate in the system in the long run. It is therefore essential that the arrival rate of the elements allows the system to be stable. In this manuscript, we characterize, algebraically, this stability region for some matching models (general, general with reneging, bipartite, extended bipartite) or skill-based queueing systems.Moreover, we demonstrate that the matching policy called First Come, First Matched (FCFM) has the property of being (generalized) maximal, meaning that the stability region of the general matching model associated with a compatibility graph and with any policy is always included in the one associated with this same graph and ruled by FCFM. Note that this latter then coincides with a set of measures defined by purely algebraic conditions. In this case, the study of stability of the matching model at hand boils down to the more elementary question of characterizing of a deterministic set of measures. We then givea (simple) way to construct the measures belonging to the latter set. This turns out to be very useful for admission control, as checking the algebraic conditions requires a number of operations which is polynomial in the number of vertices of the considered compatibility graph, and therefore becomes very expensive as the number of vertices grows large.We also give, in a product form, the expression of the stationary distribution of the number-in-system process of a stable system governed by a general matching model and under the FCFM policy, allowing, in particular, to explicitly calculate characteristics at equilibrium of concrete systems and to estimate their long-time performance. We can thus, for example, calculate the size average at equilibrium of a waiting list in the case of cross-donation of kidneys, or even, estimate the average waiting time on a peer-to-peerinterface or on a dating website.Finally, the matching rates associated with a stable matching model (general or extended bipartite) are studied. They are defined as the asymptotic frequencies of the executed respective matchings, and provide an insightful performance criterion for the corresponding matching systems, as well as the policy-insensitivity and fairness properties of the matching rates, which are also discussed
Diallo, Ibrahima. "Some topics in mathematical finance: Asian basket option pricing, Optimal investment strategies". Doctoral thesis, Universite Libre de Bruxelles, 2010. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210165.
In Chapter 2, we concentrate upon the derivation of bounds for European-style discrete arithmetic Asian basket options in a Black and Scholes framework.We start from methods used for basket options and Asian options. First, we use the general approach for deriving upper and lower bounds for stop-loss premia of sums of non-independent random variables as in Kaas et al. [Upper and lower bounds for sums of random variables, Insurance Math. Econom. 27 (2000) 151–168] or Dhaene et al. [The concept of comonotonicity in actuarial science and finance: theory, Insurance Math. Econom. 31(1) (2002) 3–33]. We generalize the methods in Deelstra et al. [Pricing of arithmetic basket options by conditioning, Insurance Math. Econom. 34 (2004) 55–57] and Vanmaele et al. [Bounds for the price of discrete sampled arithmetic Asian options, J. Comput. Appl. Math. 185(1) (2006) 51–90]. Afterwards we show how to derive an analytical closed-form expression for a lower bound in the non-comonotonic case. Finally, we derive upper bounds for Asian basket options by applying techniques as in Thompson [Fast narrow bounds on the value of Asian options, Working Paper, University of Cambridge, 1999] and Lord [Partially exact and bounded approximations for arithmetic Asian options, J. Comput. Finance 10 (2) (2006) 1–52]. Numerical results are included and on the basis of our numerical tests, we explain which method we recommend depending on moneyness and time-to-maturity
In Chapter 3, we propose some moment matching pricing methods for European-style discrete arithmetic Asian basket options in a Black & Scholes framework. We generalize the approach of Curran M. (1994) [Valuing Asian and portfolio by conditioning on the geometric mean price”, Management science, 40, 1705-1711] and of Deelstra G. Liinev J. and Vanmaele M. (2004) [Pricing of arithmetic basket options by conditioning”, Insurance: Mathematics & Economics] in several ways. We create a framework that allows for a whole class of conditioning random variables which are normally distributed. We moment match not only with a lognormal random variable but also with a log-extended-skew-normal random variable. We also improve the bounds of Deelstra G. Diallo I. and Vanmaele M. (2008). [Bounds for Asian basket options”, Journal of Computational and Applied Mathematics, 218, 215-228]. Numerical results are included and on the basis of our numerical tests, we explain which method we recommend depending on moneyness and
time-to-maturity.
In Chapter 4, we use the stochastic dynamic programming approach in order to extend
Brennan and Xia’s unconstrained optimal portfolio strategies by investigating the case in which interest rates and inflation rates follow affine dynamics which combine the model of Cox et al. (1985) [A Theory of the Term Structure of Interest Rates, Econometrica, 53(2), 385-408] and the model of Vasicek (1977) [An equilibrium characterization of the term structure, Journal of Financial Economics, 5, 177-188]. We first derive the nominal price of a zero coupon bond by using the evolution PDE which can be solved by reducing the problem to the solution of three ordinary differential equations (ODE). To solve the corresponding control problems we apply a verification theorem without the usual Lipschitz assumption given in Korn R. and Kraft H.(2001)[A Stochastic control approach to portfolio problems with stochastic interest rates, SIAM Journal on Control and Optimization, 40(4), 1250-1269] or Kraft(2004)[Optimal Portfolio with Stochastic Interest Rates and Defaultable Assets, Springer, Berlin].
Doctorat en Sciences
info:eu-repo/semantics/nonPublished
Li, Tuo. "Fingerprint Identification by Improved Method of Minutiae Matching". Miami University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=miami1484672769912832.
Thomas, Rhiannon D. "Olfactory matching-to-sample in rats using a novel apparatus /". Electronic version (PDF), 2006. http://dl.uncw.edu/etd/2006/thomasr/rhiannonthomas.pdf.
Penã, Tracy M. "Generalized identity matching-to-sample in rats using olfactory stimuli /". Electronic version (PDF), 2003. http://dl.uncw.edu/etd/2003/penat/tracypena.html.
Poerstel, L. Brooke. "Evaluating equivalence relations in rats using an olfactory matching-to-sample procedure /". Electronic version (PDF), 2007. http://dl.uncw.edu/etd/2007-3/poerstell/laurelpoerstel.pdf.
Lefever, Timothy W. "Effects of olanzapine on olfactory delayed matching-to-sample in rats". View electronic thesis (PDF), 2009. http://dl.uncw.edu/etd/2009-3/lefevert/timothylefever.pdf.
Indra, Isara. "Very low bit rate video coding using adaptive nonuniform sampling and matching pursuit". Diss., Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/15779.
Elton, Mark David. "Matching feedback with operator intent for efficient human-machine interface". Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/50152.
Spaulding, Aleigha, Jessica R. Barbee, Nathan L. Hale, Shimin Zheng, Michael G. Smith, Edward Francis Leinaar e Amal Jamil Khoury. "Analysis of Birth Rate and Predictors Using Linear Regression Model and Propensity Score Matching Method". Digital Commons @ East Tennessee State University, 2019. https://dc.etsu.edu/asrf/2019/schedule/35.
Minnenok, Lindsay R. "The matching of relative heart rate and VOp2s during graded exercise testing in healthy adults". Virtual Press, 2000. http://liblink.bsu.edu/uhtbin/catkey/1164856.
School of Physical Education
Albertazzi, Victoria Boni. "Um procedimento para o estabelecimento de discriminações condicionais com o responder do sujeito como estímulo modelo". Pontifícia Universidade Católica de São Paulo, 2013. https://tede2.pucsp.br/handle/handle/16704.
Conselho Nacional de Desenvolvimento Científico e Tecnológico
Operant behavior can be placed under stimulus control, and the relationship between discriminated responding and such stimuli can also be controlled by other stimuli, generating the behavioral process named conditional discrimination. Utilizing a rat as a subject, in order to study if it s own behavior could be used as conditional stimulus, controlling choice behavior in a simulateneous discrimination, a procedure was planed based on the proposal by Lionello-DeNolf and Urcuioli (2003). After preliminary training, central lever pressing was placed under the control of a buzzer, in a procedure in which responses emmited in tone cycle accessed a reinforcer (water) and terminated the presentation of the tone, with mean intertrial intervals (ITIs) of initially 30 seconds (range 15-45s), and passing, after two sessions, for 10 seconds mean (range 5-15s). The ratio of lever presses required for water access was gradually increased, and, after reaching FR10, a mixed schedule training was implemented, in which trials with requirements of one or 10 responses were randomically presented. The subject was then placed in a matching-to-sample situation, in which two other levers were presented, and the behavior established in the previous phase accessed comparison stimuli: a blinking and a steady lights, which alternated positions randomically. With the introduction of such condition, central lever press behavior deteriorated; in trials in which comparison stimuli were accessed, choice behavior seemed to be under the control of the position of the stimuli. The role of the ITIs duration in the establishment of simple discriminations was discussed, as well as diferences in the results of such procedures with pigeons and rats
O comportamento operante pode ser colocado sob controle de estímulos antecedentes, e a relação entre o responder discriminado e tais estímulos resultante desse processo pode, por sua vez, ser controlada por outros estímulos, gerando o processo comportamental chamado de discriminação condicional. Utilizando-se de um rato como sujeito, a fim de se estudar se o responder do mesmo poderia servir de estímulo condicional, controlando o comportamento de escolha em uma situação de discriminação simultânea, foi elaborado um procedimento com base no proposto por Lionello-DeNolf e Urcuioli (2003). Após passar por fases preliminares de treino ao bebedouro e seleção de pressão à barra central, esse responder foi colocado sob controle de um tom, em um procedimento no qual o responder em períodos de tom acessava o reforçador e terminava a apresentação do tom, com intervalos entre tentativas (ITIs) tendo inicialmente média de 30 segundos (amplitude 15-45s), e passando, após duas sessões, para média de 10 segundos (amplitude 5-15s). A razão de pressões à barra requeridas para acessar gotas de água foi aumentada, e, após chegar em FR10, foi feito um treino em esquemas mistos, no qual se alternavam, de maneira randômica, tentativas nas quais a água era liberada em CRF e tentativas nas quais a água era liberada em FR10. O sujeito foi então colocado em uma situação experimental de matching-to-sample, na qual foram apresentadas duas outras barras na caixa, e o comportamento estabelecido na fase anterior acessava estímulos comparação: uma luz constante e uma piscante, que alternavam em posição. Com a introdução do procedimento, o responder do sujeito na barra central se deteriorou; nas tentativas em que conseguiu acessar os estímulos comparação, seu comportamento de escolha pareceu estar sob controle da posição dos estímulos. Discute-se o papel do tamanho dos ITIs no estabelecimento das discriminações simples, bem como diferenças nos resultados do procedimento com pombos e ratos
Buchta, Martin. "Řízení kurzového rizika v mezinárodním obchodě". Master's thesis, Vysoká škola ekonomická v Praze, 2009. http://www.nusl.cz/ntk/nusl-16565.
Burns, Stephanie Tursic. "The Predictive Validity of Person Matching Methods in Interest Measurement". Kent State University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=kent1327781557.
Arwini, Saleh. "Improving the convergence rate of seismic history matching with a proxy derived method to aid stochastic sampling". Thesis, Heriot-Watt University, 2013. http://hdl.handle.net/10399/2651.
Stagner, Jessica P. "INVESTIGATION OF THE MONTY HALL DILEMMA IN PIGEONS AND RATS". UKnowledge, 2013. http://uknowledge.uky.edu/psychology_etds/31.
Toivonen, T. (Tuukka). "Efficient methods for video coding and processing". Doctoral thesis, University of Oulu, 2008. http://urn.fi/urn:isbn:9789514286957.
Anderson, Jesse Glenn Sigrid S. "An examination of the effects of accuracy+rate versus accuracy+observing response training methods on matching-to-sample performance". [Denton, Tex.] : University of North Texas, 2007. http://digital.library.unt.edu/permalink/meta-dc-3708.
Anderson, Jesse. "An examination of the effects of accuracy+rate versus accuracy+observing response training methods on matching-to-sample performance". Thesis, University of North Texas, 2007. https://digital.library.unt.edu/ark:/67531/metadc3708/.
Sandlund, Jonas. "Position-matching and goal-directed reaching acuity of the upper limb in chronic neck pain : associations to self-rated characteristics". Doctoral thesis, Umeå : Gävle : Univ. ; Centre for Musculoskeletal Research, University of Gävle, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-1635.
Nåtman, Jonatan. "The performance of inverse probability of treatment weighting and propensity score matching for estimating marginal hazard ratios". Thesis, Uppsala universitet, Statistiska institutionen, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-385502.
Sanaullah, Irum. "Real-time estimation of travel time using low frequency GPS data from moving sensors". Thesis, Loughborough University, 2013. https://dspace.lboro.ac.uk/2134/11938.
Warren, Kristen Marie. "Multichannel Pulse Oximetry: Effectiveness in Reducing HR and SpO2 error due to Motion Artifacts". Digital WPI, 2016. https://digitalcommons.wpi.edu/etd-theses/1219.
Chen, Xi. "Exploiting BioPortal as Background Knowledge in Ontology Alignment". Miami University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=miami1407331095.
Silva, Hélio Rodrigo Serra. "Imunização dos efeitos cíclicos no cálculo das provisões técnicas em ambiente solvência II : counter-cyclical premium e matching premium". Master's thesis, Instituto Superior de Economia e Gestão, 2012. http://hdl.handle.net/10400.5/10800.
A recente instabilidade dos mercados financeiros contribuiu para o aumento do debate em torno da avaliação das responsabilidades e dos ativos das empresas de seguros e de resseguros. Tal decorre do desvio significativo que os preços de mercado podem sofrer em relação aos fundamentos económicos implícitos, refletindo a aversão ao risco e o interesse próprio dos investidores. Este texto é o relatório de um estágio curricular realizado no Instituto de Seguros de Portugal. O projeto subjacente consistiu no estudo aprofundado de dois inovadores instrumentos, agora propostos pelas instâncias da União Europeia, para a imunização dos efeitos cíclicos no cálculo das provisões técnicas, em ambiente Solvência II: o counter-cyclical premium e o matching premium. Ambos atuam sobre a Estrutura Temporal das Taxas de Juro, mas enquanto que o primeiro é utilizado apenas em períodos de elevado stress financeiro, o outro tem em vista as empresas que utilizam uma estratégia de buy-and-hold de ativos.
The recent instability of financial markets has raised the debate on the area of the valuation of the liabilities and assets of the insurance and reinsurance undertakings. This follows from the significant deviation that market prices may suffer in relation to their implied economic fundamentals, reflecting the risk aversion and self-interest of investors. This internship report explains the insightful study that was developed about two new instruments, as proposed by European Union bodies: the counter-cyclical premium and the matching premium. The purpose is the immunization of cyclical effects in the calculation of technical provisions, under Solvency II environment. They are both added to the risk free interest rate term structure, but while the first is applied only during stressed periods the other can be used whenever insurers take a buy-and-hold strategy, being able to hold the relevant assets until maturity. The internship was with the Portuguese Insurance and Pension Funds Supervisory Authority (Instituto de Seguros de Portugal).
Choudhary, Saumya. "On Plasmonic Superradiance, the Scaling Laws of Spontaneous Parametric Downconversion, and the Principles and Recent Advances in Nonlinear Optics". Thesis, Université d'Ottawa / University of Ottawa, 2016. http://hdl.handle.net/10393/35132.
Brückner, Markus. "Essays in Macroeconomics". Doctoral thesis, Universitat Pompeu Fabra, 2010. http://hdl.handle.net/10803/7593.
between foreign aid and economic growth in the Least Developed Countries. Instrumental
variables techniques are used to estimate the effect that economic growth has on foreign aid
and to adjust for the reverse causal effect that growth has on aid when estimating the effect that
aid has on growth. The second chapter examines the effects that fiscal expansions have on the
unemployment rate. The chapter presents SVAR evidence for ten OECD countries and builds a
DSGE model with a labor force participation choice and workers' heterogeneity to explain the
empirical findings. The third chapter examines the effects that economic growth has on the
support for extreme political platforms. The chapter provides a theoretical model in favor of
growth effects (as opposed to level effects) on the support for extreme political parties, and
investigates empirically the relationship between growth and extremist votes for 16 OECD
countries.
Esta tesis consiste en tres capítulos. El primer capítulo examina empíricamente la relación entre
la ayuda exterior y crecimiento económico en los países menos adelantados. Técnicas de
variables instrumentales se utilizan para estimar el efecto que el crecimiento económico tiene
sobre la ayuda exterior y para ajustar el efecto de causalidad inversa que el crecimiento tiene en
la ayuda al estimar el efecto que la ayuda tiene sobre el crecimiento. El segundo capítulo
analiza los efectos que las expansiones fiscales tienen sobre la tasa de desempleo. El capítulo
presenta pruebas SVAR para diez países de la OCDE y construye un modelo DSGE con una
participación en la fuerza de trabajo y heterogeneidad de los trabajadores para explicar los
resultados empíricos. El tercer capítulo analiza los efectos que el crecimiento económico tiene
en el apoyo a las plataformas políticas extremas. El capítulo ofrece un modelo teórico a favor
de los efectos del crecimiento (en contraposición a los efectos de nivel) con el apoyo de
partidos políticos de extrema, e investiga empíricamente la relación entre el crecimiento de
votos y extremistas para 16 países de la OCDE.
Mayberry, Curtis Lee. "Interface circuits for readout and control of a micro-hemispherical resonating gyroscope". Thesis, Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/53116.
Singh, Harshvardhan P. "Towards Achieving Highly Parallelized Publish/Subscribe Matching at Line-rates Using Reconfigurable Hardware". Thesis, 2011. http://hdl.handle.net/1807/31445.
Lin, Chih-wei, e 林志威. "LTE Downlink Systems Using Adaptive Rate Matching". Thesis, 2011. http://ndltd.ncl.edu.tw/handle/24577405581166372554.
國立中央大學
通訊工程研究所
99
This thesis focuses on LTE downlink systems with shared channel coding between medium access control layer (MAC) and physical layer, using turbo coding, and hybrid automatic repeat request (HARQ). It made reference to Incremental redundancy type II HARQ (IR Type II HARQ), and proposed adaptive rate matching, Its purpose is not IR Type II HARQ retransmission method, We want to adjust the way through the training code rate, allows the system to adapt to different channel environments. After adjust code rate, LTE systems can save computing time. And we also use OFDM, beamforming technology and simulation in different environments. The simulation results showed that adaptive rate matching can enhance the code rate according to different environments, saving transmission bits, and will not affect the decoding success rate, need to use very few number of HARQ.
FU, CHEN-YOU, e 傅晨祐. "Improvement on Rate Matching for 5G Polar Codes". Thesis, 2019. http://ndltd.ncl.edu.tw/handle/nhyccb.
國立臺灣科技大學
電子工程系
107
With the development of communication technology, 3GPP NR standards discussions for 5G, polar codes have been adopted as the control channel coding because of its good performance. Although the polar code has the advantage of low block error rates, it has the disadvantage that its code length can only be limited to a power of two, resulting in a large limitation in various applications. In order to be able to choose the code length of the polar code, the fifth-generation mobile communication specification also proposes a rate matching mechanism, which can select the code length to transmit. There are three ways to rate matching, namely puncturing, shortening, and repetition. In this paper, we will only discuss how to improve the two mechanisms of puncturing and shortening in the existing 5G rate matching. The puncturing mechanism works by selecting not to transfer certain bits after coding, so that the effect of decreasing the code length is achieved. Shortening is also achieves the effect of decreasing the code length. The difference between puncturing and shortening is that the values of punctured bits are unknown to the receiver and the values of shortened bits are known in advance. The repetition mechanism works by selecting to retransfer certain bits after coding, so that the effect of extending the code length is achieved. The method we propose is based on the sub-channel reliability estimation by GA(Gaussian Approximation) and the 5G rate matching circular buffer. It turns out that our method achieves a better BLER.
Lee, Da-Huei, e 李大輝. "Dynamic Element Matching Approaches for Oversampling-Rate and Nyquist-Rate Data Converters". Thesis, 2008. http://ndltd.ncl.edu.tw/handle/97751080152686237249.
國立成功大學
電機工程學系碩博士班
96
Data converters have become very important building blocks for integrated circuits (ICs) due to the fast growth of digital signal processing systems recently. Lower cost high-performance data converters are strongly demanded to satisfy the requirements of more complicated system-on-a-chip (SOC) systems. Element mismatch is one of the major impairments for low-cost high-resolution data converters. Dynamic element matching (DEM) approaches have been widely used to suppress the harmonic distortions caused by element mismatches. In this dissertation, several DEM approaches are proposed and analyzed. For oversampling-rate data converters, advancing data weighted averaging (ADWA) is proposed to remedy baseband tone problems of conventional DWA. For Nyquist-rate data converters, random multiple DWA (RMDWA), random incrementing DWA (RIDWA) and randomized thermometer-coding (RTC) are proposed to achieve high spurious-free dynamic range (SFDR) and small maximum output error. Furthermore, an ultra low-cost Nyquist-rate current-steering digital-to-analog converter (DAC) is implemented to experimentally verify the proposed RTC. For oversampling-rate data converters, multibit sigma–delta modulators usually employ the DWA to suppress the element mismatch effect but are plagued by baseband tone problems. The existing DWA-like approaches for solving these problems are categorized in this dissertation as tone-suppressing and tone-transferring approaches. Although tone-transferring approaches can achieve a better signal-to-noise-plus-distortion ratio than tone-suppressing approaches, they may behave unfavorably for input signals with dc components. A flexible DWA-like approach, ADWA, which can achieve both tone-suppressing and tone-transferring functions, is proposed. Moreover, ADWA can be a reconfigurable approach that uses input signal detection schemes to set its configuration. For Nyquist-rate data converters, three DEM approaches are proposed to be used with a proper layout switching scheme in a proposed new DAC structure. RMDWA and RIDWA have randomization and consecutive selection properties. Randomization effectively suppresses harmonic distortions to achieve good SFDR. Consecutive selection obtains small static output errors when it is used with the presented rotated walk switching scheme. The third DEM approach proposed for Nyquist-rate DACs is RTC, which provides randomization, consecutive selection, and low element switching activity properties. In addition to the benefits of the proposed RMDWA and RIDWA, low element switching activity can achieve small dynamic errors caused by element switching. To experimentally verify the proposed RTC, a 14-bit ultra low-cost current-steering DAC is implemented in a 1P6M 0.18-μm 1.8-V CMOS process. The measured SFDR is up to 80dB for single-tone tests at a 10MHz sampling frequency. The measurement results show that the RTC can improve the SFDR by 16dB. The 14-bit current-steering DAC has an active area of less than 0.28-mm2. The active area of the DAC is smaller than those of the state-of-the-art DACs with 14-bit resolution. The active area of the DAC is also smaller than those of other published 12-bit and 10-bit DACs.
Reis, Sofia Santos dos. "Um olhar sobre os diplomados: a relação entre área de formação e posto de trabalho, em Portugal". Master's thesis, 2012. http://hdl.handle.net/10071/5465.
Este estudo enquadra-se nos estudos sobre a correspondência entre o nível de escolaridade e o posto de trabalho e centra-se exclusivamente no tipo de correspondência horizontal, em que se estabelece a correspondência entre a área de formação e o posto de trabalho. Procurando assim inovar e demarcar pela diferença ao não seguir a tendência dos estudos focados na correspondência vertical, em que se analisa se os indivíduos estão a ocupar postos de trabalho que correspondem ao seu nível de escolaridade. Os dados utilizados foram fornecidos pelo GEP – Gabinete de Planeamento e Estratégia, do Ministério do Trabalho e Solidariedade Social, provenientes dos Quadros Pessoal, abrangendo um período de dez anos, de 1999 a 2009, com um ano de quebra de série, correspondente a 2001, sendo seleccionados apenas os indivíduos com o ensino superior distribuídos pelas áreas de formação e pelos postos de trabalho. O foco da análise incide no cálculo de taxas de eficácia em duas leituras: sobre o total de diplomados no conjunto dos postos de trabalho da área correspondente e sobre o conjunto de diplomados com um posto de trabalho na sua área de formação no total de diplomados da área correspondente. Os resultados, marcados pela diversidade de resultados entre as diferentes áreas e nos dois tipos de leitura, confirmam taxas de eficácia abaixo dos 50%, em ambas as leituras, indicando que uma maioria significativa de diplomados trabalha fora da sua área de formação. Mediante resultados tão baixos em termos de eficácia, segue-se a problemática da ineficácia de correspondência, com a discussão sobre a concentração de diplomados em postos de trabalho fora das suas áreas, bem como a possível influência das taxas de desemprego das áreas, já que áreas de formação com a taxa de desemprego superior à da eficácia se traduzem num valor elevado de ineficácia, e a hipótese de mobilidade profissional, verificando que não houve um melhoramento da eficácia no decorrer do período em análise.
This study was based on studies of the matching between the level of education and the job and focuses exclusively on horizontal matching type, which establishes the correspondence between the study area and the job. Looking for innovating and demarcating by the difference to not following the trend of the studies focused on vertical matching, it analyzes whether individuals are occupying jobs that match your education level. The data used were provided by the GEP - Planning and Strategy Office, Ministry of Labour and Social Solidarity, from the Personnel Boards, covering a period of ten years, from 1999 to 2009, with one break series year, corresponding to 2001, being selected only individuals with higher education distributed by the study areas and jobs. The focus of the analysis concerns on the calculation of rates of efficacy in two readings: on total graduates in the jobs of the match area and on the number of graduates with a job in their study field in total graduates matching area. The results, marked by the diversity of results between the different areas and the two types of reading, confirm efficacy rates below 50% in both readings, indicating that a significant majority of graduates is working outside their area of training. Through such low results in terms of effectiveness, it follows the issue of ineffectiveness of correspondence with the discussion on the concentration of graduates in jobs outside their areas, as well as the possible influence of unemployment areas, since study areas with unemployment rates higher than the efficiency translate into high value of inefficiency, and mobility hypothesis, indicating that there was an improvement in efficiency, during the period under analysis.
Shen, Richar Jyh Sheen, e 沈志賢. "A Fast Predictive Block-Matching Motion Estimation Algorithm for Low Bit-Rate Coding". Thesis, 2000. http://ndltd.ncl.edu.tw/handle/83875101746092077786.
國立中興大學
電機工程學系
88
For low bit-rate video coding, predictive block-matching motion estimation algorithms have been used to replace the logarithmic step search algorithms because the motion vector searching time can be greatly reduced by utilizing the correlation existing in motion vectors. However, these algorithms still suffer from their large computations if the initial prediction is not accurate enough. As a result, the motion vector searching time can vary acutely from frame to frame. In this article, we investigate the correlation among motion vectors (MV). Our study shows that the x component of MV is more related to its vertical neighbor MVs while the y component of MV is more depedent on its horizontal neighbor MVs. Based on the observation, we design a modified three-block median predictor to improve the motion vector predicting accuracy. By employing the predictor, a fast predictive block-matching motion estimation algorithm, the vector search algorithm (VSA), is proposed. Instead of checking all locations in the search area, the VSA only searches locations in the most probable direction. Simulation results indicate that our algorithm is much faster than other fast search algorithms as well as maintaining similar or better performance in terms of mean-square error measurement.
Lu, Wei-Yuan, e 呂偉元. "A Low Bitrate Video System Using New Block Matching And Rate Control Schemes". Thesis, 1998. http://ndltd.ncl.edu.tw/handle/92340124721772058595.
CHEN, HO-CHIAN, e 陳和謙. "Map Matching for Low-Sampling-Rate GPS Trajectories by Exploring Real-time Moving Directions". Thesis, 2016. http://ndltd.ncl.edu.tw/handle/rxqjq5.
國立中正大學
資訊工程研究所
104
Map matching is the process of matching a series of recorded geographic coordinates (e.g., a GPS trajectory) to a road network. Due to GPS positioning errors and the sampling constraints, the GPS data collected by the GPS device are not precise, and the location of a user can not always be correctly shown on the map. Therefore, map matching is an important preprocessing step for many applications such as navigation systems, traffic flow analysis, and autonomous cars. Unfortunately, most current map-matching algorithms only consider the distance between the GPS points and the road segments, the topology of the road network, and the speed constraint of the road segment to determine the matching results. Moreover, most current map-matching algorithms can not handle the matching problem at junctions. In this paper, we propose a spatio-temporal-direction based matching algorithm (STD-matching) for low-sampling-rate GPS trajectories. STD-matching considers (1) the spatial features such as the distance information and topology of the road network, (2) the speed constraints of the road network, and (3) the real-time moving direction which shows the movement of the user. Moreover, we also reduce the running time by performing GPS clustering, GPS smoothing, and the A* shortest path algorithms. In our experiments, we compare STD-matching with two baseline algorithms, the ST-matching algorithm and the stMM algorithm, using a real data set. The experiment results show that our STD-matching algorithm outperforms the two baseline algorithms in terms of matching accuracy.
Shih, Liang-chun, e 石良俊. "Rate-distortion optimization based on quality layer assignment for scalable matching pursuit video coding". Thesis, 2009. http://ndltd.ncl.edu.tw/handle/5ehehf.
國立中山大學
通訊工程研究所
97
Although fine granularity scalability (FGS) video coding based on matching pursuits and bit-plane coding have been proven to have better coding efficiency than discrete-cosine-transform-based FGS at low bit rates, it might not be the most efficient method in terms of rate-distortion optimization (RDO). We propose a rate-distortion optimization FGS video coding by dividing a frame into blocks to generate block-based embedded bit-streams and reorganize the bit-streams into several quality layers according to the rate-distortion slopes. The comparison between FGS matching pursuit video coding and RDO-FGS matching pursuit video coding is shown in the experimental results.
Cheng, Li-Jie, e 鄭立傑. "A Link-Adapted Fragment and Rate Matching (FaRM) MAC Protocol for Mobile Ad Hoc Networks". Thesis, 2004. http://ndltd.ncl.edu.tw/handle/96732255557812977502.
淡江大學
資訊工程學系碩士班
94
In the wireless environment, the channel condition varies due to several factors, especially in mobile ad hoc networks. Previous researches use SNR thresholds to determine the channel condition. However, SNR thresholds may not be an accurate decision, especially in a quickly varied environment. This paper proposes a fragment and rate matching (FaRM) MAC protocol for mobile ad hoc networks. In FaRM, stations dynamically detect the current signal-noise-ratio (SNR) to present the channel quality through the control frame exchange. Then FaRM uses Finite State Markov Chain to predict the variation of the channel quality. FaRM therefore can get closer results of the error occurrence in the channel than previous researches. According to the results generated from Finite State Markov Chain, FaRM dynamically selects the transmission rate with an acceptable fragment length. FaRM not only gains better throughput through the selection of high rate, but also increases the reliability by fragmentation. Comparing to other researches, the simulation results show FaRM has better performance, higher transmission reliability and lower transmission delay time by fragmentation according to the prediction of the network.
CHEN, PING-SHEN, e 陳丙紳. "Relationship between Different Testing and Judo Matchon Heart Rate". Thesis, 2014. http://ndltd.ncl.edu.tw/handle/35834528917697198409.
國立體育大學
競技與教練科學研究所
102
Relationship between Different Testing and Judo Match on Heart Rate Abstract Research purposes: to explore the relationship between the different test methods and the heartbeat rates of special judo loads. Research Method: the research objects were eight lightweight ((<66 kg) and (<73kg)) university Group A judo players (average age: 21±1.06 years old; height: 171±6.84 cm; weight: 69±5.59 kg; training years: 10±2 years). Each player performed the continuous suplex attack for 10 seconds, the cross run and the 150m speed run. Then, the comparison was made between the Judo match play and 90-second attack in terms of the heartbeat rate. The data were analyzed with the Pearson product-moment correlation and the repeated measures one-way ANOVA. Results: there a correlation between 150m sprint and the test of the 90-second special judo (r2=0.5); the correlation coefficient of the coordination and the special test is r2=0.3; there is a correlation between special judo UKSN and the coordination test (r2=0.7); there is no correlation between special Judo UKSN and the 3m cross run (r2=0.1). Conclusion: the basic and special abilities of all players can be observed from the four-quadrant analysis model. The poor basic judo abilities affects the special athletic performance. In the future training, the sections needing to be strengthened by the players can be clearly known and the predicted basic abilities of the training preparation period can be planned through the four-quadrant analysis model. Keywords: Special judo training, 3m cross run, coordination, 150m
Greguson, Lezlee Ann. "Differential effects of reinforcement rate and delay on response allocation a systematic approach utilizing the matching law /". 2008. http://digital.library.okstate.edu/etd/umi-okstate-2803.pdf.
Park, Han-Young. "A Hierarchical Multiscale Approach to History Matching and Optimization for Reservoir Management in Mature Fields". Thesis, 2012. http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11779.
Lin, I.-chi, e 林沂錡. "A research on the matching rate of foreign health caring labors - take K international labor agency for example". Thesis, 2012. http://ndltd.ncl.edu.tw/handle/85348191955726310630.
國立中山大學
高階經營碩士班
100
According to the lower birth rate and more mature demographic structure, our society is facing the problem about aging of population. The market need for long term care is getting more and more obvious in recent years, and especially the atmosphere to hire the foreign care assistant is quite common and widely-spread in Taiwan. Also by viewing the statistic survey, it is pretty obvious to know that the number about foreign worker who were imported into Taiwan is increasing year by year in a quite significant way. However the processes and paper work are with great complicated, so most of the people who have the demand of foreign care assistant will tend to apply through the international humanity agency. Then the original motive of our research is from the prospect of the agency to elevate its value of their service. Therefore at the very beginning we will focus on the related factors which influence the rate of match, and then we will go deeper to explore the more specific cause which has the relevant connection with the foreign workers’ job satisfaction. In addition, we conclude that there were two significant dimensions which might influence the job satisfaction, and then they are the relationship between employer and employee, and the other dimension is about the qualification of the workers to meet the requirement and the characteristic of caring job. This thesis will utilize some questionnaires which include: performance, job satisfaction, leader-member exchange relationship, empathy, hardness and social personality. This Research used the foreign health care assistants working in Taiwan from Indonesia as samples to do the actual research. We gave out 100 questionnaires in total, and collected 93 effective. And we used SPSS statistic software to analyses the relation between every parameter.The result of study is found as follows: 1. The match rate will be demonstrated by the performance which received by the employer. 2. The Job satisfaction will influence the performance as care assistants. 3. The Job satisfaction will be influenced by the leader-member exchange relationship, empathy and social personality tendency.
Lyons, Laura. "The Effects of the Mastery of Auditory Matching of Component Sounds to Words on the Rate and Accuracy of Textual and Spelling Responses". Thesis, 2014. https://doi.org/10.7916/D8542KRM.
Lee, Heung Ki. "Adaptive Resource Management Schemes for Web Services". 2009. http://hdl.handle.net/1969.1/ETD-TAMU-2009-12-7608.