computational models and empirical studies

... Bottom-Up Models In the remainder of the paper we provide simple models that nevertheless accurately capture the varying magnitudes and exponents seen for different grammar encodings and tree ... magnitudes and exponents 4.4 Traversals Now that we have models for active and passive edges, we can combine them to model traversal counts as well We assume that the chance for a passive edge and an ... see past this effect, which inflates the empirical exponents, we turn to the actual traversal counts, which better illuminate the issues at hand Figures (a) and (b) show the traversal curves corresponding...

Ngày tải lên: 17/03/2014, 07:20

... by-participants and by-items ANOVAs (both p < 0.05) and in a linear mixedeffects analysis with participants- and item-specific random interactions (t > 2; see Baayen et al., 2008) The same pattern persists and ... Proceedings of the 13th Conference on Empirical Methods in Natural Language Processing, pages 234–243 Levy, R and Andrew, G (2006) Tregex and Tsurgeon: tools for querying and manipulating tree data structures ... true sentence) and PC (·) terms reflect the comprehender’s linguistic knowledge and beliefs about the noise processes intervening between intended sentences and perceptual input w∗ and w must be...

Ngày tải lên: 30/03/2014, 21:20

... Labels and Protected Geographical Indication (PGI) Labels Regional and local origin labeling is also gaining prominence The increasing demand for high-quality and high-status products and a desire ... and quality-signal variables (supermarket and label) perform better statistically than the standard intrinsic-quality cue variables (fat and color) In a similar study, Jekanowski, Williams, and ... information issues and their implications for foodsupply chains, markets, and trade will continue to gain prominence More research is needed to understand these markets and information issues and evaluate...

Ngày tải lên: 08/04/2014, 18:33

... 9385 4734 [MFIN6210 – Empirical Studies in Finance] 10 COURSE SCHEDULE Week (March 3rd) Agency theory and empirical tests  Ang, J., Cole, R and J Wuh Lin, ‘Agency costs and ownership structure’ ... familiar with and adhere to university policies in relation to class attendance and general conduct and behaviour, including maintaining a safe, respectful environment; and to understand their obligations ... datasets, develop econometric models and test hypotheses and theories using market-based data; Have developed sound critical and analytical skills, be able to discuss and write-up your own research...

Ngày tải lên: 20/06/2014, 14:20

... 9385 4734 [MFIN6210 – Empirical Studies in Finance] 10 COURSE SCHEDULE Week (March 3rd) Agency theory and empirical tests  Ang, J., Cole, R and J Wuh Lin, ‘Agency costs and ownership structure’ ... familiar with and adhere to university policies in relation to class attendance and general conduct and behaviour, including maintaining a safe, respectful environment; and to understand their obligations ... datasets, develop econometric models and test hypotheses and theories using market-based data; Have developed sound critical and analytical skills, be able to discuss and write-up your own research...

Ngày tải lên: 20/06/2014, 14:20

... square (OLS) and their standard errors (SE) The ordinary least square estimates and standard errors are obtained from R function lm 81 3.6 Posterior means, standard deviations, ... median and 97.5% quantile of α0 , βc and σ simulated from BayEL by two-step Metropolis Hastings (TMH) and HMC 84 3.7 Acceptance rate for each node 86 4.1 ¯ The means and standard ... effects Based on the first and second Bartlett identities, the empirical likelihood were then constructed for both area and unit level models Hierarchical priors were used and finally more accurate...

Ngày tải lên: 09/09/2015, 08:17

... area and has become a powerful tool in other research fields, especially chemistry, biology and interdisciplinary subjects, which focus on simple and complicated molecular-system studies Computational ... stimulating discussion and useful suggestions I also profoundly give my sincere thanks to my colleagues and friends who helped and supported me through the whole Ph.D studies, Enyi Ye, Jing Shi, ... Energy Supply and Requirement for Constructing a Molecular 94 machine 4.1.4 Pseudorotaxanes, Rotaxanes, and Catenanes 95 iv 4.1.5 Cyclodextrin 96 4.2 Computational Methods 99 4.3 Results and Discussion...

Ngày tải lên: 14/09/2015, 13:07

... Damiani Return of the Ether (1999) Sid Deutsch To my wife Mary, and to our children Jennifer, Michael, and Thomas, and grandchildren Andrew and Sylvia Foreword MIT Lincoln Laboratory was founded in ... technological, and economic circumstances occurring in the late 1970s and early 1980s allowed the Lincoln Laboratory land clutter measurement project to be implemented and thereafter continued in studies and ... strengths of the land clutter returns and their statistical attributes as they vary from pulse to pulse and cell to cell The problem of bringing statistical order and predictability to land clutter...

Ngày tải lên: 12/10/2016, 13:33

... simultaneously handle both traffic that is sent to the standby MAC address and the private MAC address The commands for enabling HSRP and configuring an HSRP group are standby ip and standby group ... of bandwidth and bandwidth efficiency For example, all technologies and features used to connect campuses over a WAN are developed to meet the following design requirements: q Optimize WAN bandwidth ... switches build and maintain switching tables and search for loops Routers build and maintain both routing tables and service tables There are two methods of switching data frames: Layer and Layer...

Ngày tải lên: 22/10/2013, 20:15

... students and researchers It is hoped that this book will provide a reference to students, researchers and practitioners in both introducing the topic of data streams and understanding the practical and ... Dimensionality Reduction and Forecasting on Streams Spiros Papadimitriou, Jimeng Sun, and Christos Faloutsos Related work Principal component analysis (PCA) Auto-regressive models and recursive least ... researchers, the topics and content will be organized in such a way so as to present the most important models, algorithms, and applications in the data mining field in a structured and concise way In...

Ngày tải lên: 08/11/2013, 02:15

... environments with limited bandwidth such as sensor networks and handheld devices Thus knowledge structure representation is an important issue After extracting models and patterns locally from ... STREAMS: MODELS AND ALGORITHMS rn Tradeoff between Accuracy and Efficiency: The main tradeoff in data stream mining algorithms is between the accuracy of the output with regard to the application and ... remove this watermark 36 DATA STREAMS: MODELS AND ALGORITHMS Discussion In this paper, we have discussed effective and efficient methods for clustering and classification of data streams The...

Ngày tải lên: 08/11/2013, 02:15

... STREAMS: MODELS AND ALGORITHMS On Demand Classification Aggarwal et al have adopted the idea of micro-clusters introduced in CluStream [2] in On-Demand classification in [3] The on-demand classification ... Demand Classification of Data Streams, Proc 2004 Int Con$ on Knowledge Discovery and Data Mining (KDD '04), Seattle, WA [4] Babcock B., Babu S., Datar M., Motwani R., and Widom J (2002) Models and ... Holder and Diane Cook, Springer Verlag, to appear lease purchase PDF Split-Merge on www.verypdf.com to remove this watermark 58 DATA STREAMS: MODELS AND ALGORITHMS [15] Gama J., Rocha R and Medas...

Ngày tải lên: 08/11/2013, 02:15

... simultaneously handle both traffic that is sent to the standby MAC address and the private MAC address The commands for enabling HSRP and configuring an HSRP group are standby ip and standby group ... of bandwidth and bandwidth efficiency For example, all technologies and features used to connect campuses over a WAN are developed to meet the following design requirements: q Optimize WAN bandwidth ... switches build and maintain switching tables and search for loops Routers build and maintain both routing tables and service tables There are two methods of switching data frames: Layer and Layer...

Ngày tải lên: 10/12/2013, 14:16

... and whose counts are less than An item whose counts exceeds is called Hierarchy Heavy Hitter (HHH), and we want to find all HHHs in a data stream They have presented both deterministic and randomized ... Shinji Kawasoe, and Setsuo Arikawa Online algorithms for mining semi-structured data stream In ICDM, pages 27-34,2002 [4] B Babcock, S Babu, M Datar, R Motwani, and J Widom Models and f Issues in ... time was reversed and the data stream arrived in reverse order, starting at t ht and ending at t Examples of the forward and reverse density profiles are illustrated in Figures 5.1 and 5.2 respectively...

Ngày tải lên: 15/12/2013, 13:15

... response, and both space and time are critical in processing, we examine both time and space consumption In our study, besides presenting the total time and memory taken to compute and store ... beforehand, which does not fit the single-scan and dynamic nature of data streams Recently, there have been intensive studies on the management and querying of stream data ([8, 17, 18, 16]), and ... ,XN be N random variables, such that 1.1 each random variable X j takes the value vj/P with probability P and the value zero otherwise Let & be the sum of these random variables and let A~ =...

Ngày tải lên: 15/12/2013, 13:15

... them A load shedder, on the other hand, involves little more than a single call to a random number generator and thus can be very efficiently implemented In empirical tests using the STREAM system, ... data elements at a given time instant and window size refers to N 0.1 Motivation and Road Map Our aim is to develop algorithms for maintaining statistics and models that use space sublinear in ... studied by Das, Gehrke and Riedwald [6] and Kang, Naughton and Viglas [16] This further motivates the need to maintain various statistics over sliding windows, using small space and update time This...

Ngày tải lên: 15/12/2013, 13:15

... watermark 174 DATA STREAMS: MODELS AND ALGORITHMS The Chernoff bound [14] applies when X is the sum of several independent and identical Bernoulli random variables, and has a lower tail bound ... to remove this watermark DATA STREAMS: MODELS AND ALGORITHMS the wavelet coefficient definition i.e half the difference between the left hand and right hand side of the time series While this ... point with each of these random vectors Each component of the k random vectors is drawn from the normal distribution with zero mean and unit variance In addition, the random vector is normalized...

Ngày tải lên: 15/12/2013, 13:15

... watermark 212 DATA STREAMS: MODELS AND ALGORITHMS duration w, we simply regard the stream join between S 1and S2as a relational join view over append-only bags S 1and S2with an extra "window join ... sensors, which is slower and less reliable The resulting distribution has a higher variance and looser bounds, and lags slightly behind that of S1 To correlate measurements from S1 and S2by time, we ... tuples sl and s2, SI'S ECB dominates S ~ ' SECB if and only if b(sl) b(s2) Therefore, + lease purchase PDF Split-Merge on www.verypdf.com to remove this watermark DATA STREAMS: MODELS AND ALGORITHMS...

Ngày tải lên: 15/12/2013, 13:15

... STREAMS :MODELS AND ALGORITHMS Introduction Raw stream data, such as faults and alarms generatedby network traffic monitors and log records generated by web servers, are almost always at low level and ... Keogh and T Folias Time Series Data Mining Archive In http://www.cs.ucr:edu/"eamonn/TSDMA, 2002 [I 91 Y Law, H Wang, and C Zaniolo Query languages and data models for database sequences and data ... models such as stochastic models and multivariate regression enable capturing intra-sensor and inter-sensor dependencies in order to model sensor network data accurately Such models can be used in...

Ngày tải lên: 15/12/2013, 13:15

... most streams exhibit a slow dip and then ascent (e.g., see 2, and and, to a lesser extent, 3, and 8) However, a number of them start fluctuating more quickly and violently when the second hidden ... a succinct summary to the user, they can help to fast forecasting and detect outliers, and they facilitate interpolations and handling of missing values, as we discuss later The rest of the chapter ... related work, on data streams and stream mining Section and overview some of the background Section describes our method and Section shows how its output can be interpreted and immediately utilized,...

Ngày tải lên: 15/12/2013, 13:15