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作者:Kahmann, Sydney; Hartman, Erin; Leap, Jorja; Brantingham, P. Jeffrey
作者单位:University of California System; University of California Los Angeles; University of California System; University of California Berkeley; University of California System; University of California Los Angeles; University of California System; University of California Los Angeles
摘要:In 2011, the Los Angeles Police Department (LAPD), in conjunction with other governmental and nonprofit groups, launched the Community Safety Partnership (CSP) in several public housing developments in Los Angeles. Following a relationship-based policing model, officers were assigned to work collaboratively with community members to reduce crime and build trust. However, evaluating the causal impact of this policy intervention is difficult, given the notable differences between communities whe...
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作者:Chen, Jiahua; Liu, Yukun; Taylor, Carilyn G.; Zidek, James, V
作者单位:University of British Columbia; East China Normal University
摘要:The distribution of lumber strength of any grade may evolve, for example, due to climate change, forest fire, changes in processing methods, and other factors. So, in North America the forest products industry monitors the evolution of their means, percentiles, or other parameters to ensure the wood products meet the industrial standard. For administrative convenience and informativeness, one may adopt a rotating sampling plan by sampling 36 mills in the initial occasion and having six of them...
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作者:D'Angelo, Nicoletta; Adelfio, Giada; Abbruzzo, Antonino; Mateu, Jorge
作者单位:University of Palermo; Universitat Jaume I
摘要:We analyse the spatio-temporal distribution of visitors' stops by touristic attractions in Palermo (Italy), using theory of stochastic point processes living on linear networks. We first propose an inhomogeneous Poisson point process model with a separable parametric spatio-temporal first-order intensity. We account for the spatial interaction among points on the given network, fitting a Gibbs point process model with mixed effects for the purely spatial component. This allows us to study firs...
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作者:Schneble, Marc; Kauermann, Goeran
作者单位:University of Munich
摘要:In the past decades the growing amount of network data lead to many novel statistical models. In this paper we consider so-called geometric networks. Typical examples are road networks or other infrastructure networks. Nevertheless, the neurons or the blood vessels in a human body can also be interpreted as a geometric network embedded in a three-dimensional space. A network-specific metric, rather than the Euclidean metric, is usually used in all these applications, making the analyses of net...
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作者:Wang, Tianhao; Yu, Lei; Leurgans, Sue E.; Wilson, Robert S.; Bennett, David A.; Boyle, Patricia A.
作者单位:Rush University
摘要:In studies of cognitive aging, it is crucial to distinguish subtypes of longitudinal cognition change while accounting for the effects of given covariates. The longitudinal cognition trajectories and the covariate effects can both be nonlinear with heterogeneous shapes that do not follow a simple parametric form, where flexible functional methods are preferred. However, most functional clustering methods for longitudinal data do not allow controlling for the possible functional effects of cova...
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作者:Held, Leonhard; Micheloud, Charlotte; Pawel, Samuel
作者单位:Swiss School of Public Health (SSPH+); University of Zurich
摘要:Replication studies are increasingly conducted in order to confirm original findings. However, there is no established standard how to assess replication success, and, in practice, many different approaches are used. The purpose of this paper is to refine and extend a recently proposed reverse-Bayes approach for the analysis of replication studies. We show how this method is directly related to the relative effect size, the ratio of the replication to the original effect estimate. This perspec...
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作者:Jones, David E.; Stenning, David C.; Ford, Eric B.; Wolpert, Robert L.; Loredo, Thomas J.; Gilbertson, Christian; Dumusque, Xavier
作者单位:Texas A&M University System; Texas A&M University College Station; Simon Fraser University; Pennsylvania Commonwealth System of Higher Education (PCSHE); Pennsylvania State University; Pennsylvania State University - University Park; Pennsylvania Commonwealth System of Higher Education (PCSHE); Pennsylvania State University; Pennsylvania State University - University Park; Pennsylvania Commonwealth System of Higher Education (PCSHE); Pennsylvania State University; Pennsylvania State University - University Park; Pennsylvania Commonwealth System of Higher Education (PCSHE); Pennsylvania State University; Pennsylvania State University - University Park; Duke University; Cornell University; University of Geneva
摘要:The radial velocity method is one of the most successful techniques for detecting exoplanets. It works by detecting the velocity of a host star, induced by the gravitational effect of an orbiting planet, specifically, the velocity along our line of sight which is called the radial velocity of the star. Low-mass planets typically cause their host star to move with radial velocities of 1 m/s or less. By analyzing a time series of stellar spectra from a host star, modern astronomical instruments ...
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作者:Zhu, Shixiang; Xie, Yao
作者单位:University System of Georgia; Georgia Institute of Technology
摘要:Crimes emerge out of complex interactions of human behaviors and situations. Linkages between crime incidents are highly complex. Detecting crime linkage, given a set of incidents, is a highly challenging task since we only have limited information, including text descriptions, incident times, and locations. In practice, there are very few labels. We propose a new statistical modeling framework for spatiotemporal-textual data and demonstrate its usage on crime linkage detection. We capture lin...
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作者:Parker, Paul A.; Holan, Scott H.; Janicki, Ryan
作者单位:University of Missouri System; University of Missouri Columbia
摘要:Statistical estimates from survey samples have traditionally been obtained via design-based estimators. In many cases these estimators tend to work well for quantities, such as population totals or means, but can fall short as sample sizes become small. In today's information age, there is a strong demand for more granular estimates. To meet this demand, using a Bayesian pseudolikelihood, we propose a computationally efficient unit-level modeling approach for non-Gaussian data collected under ...
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作者:Hu, Liangyuan; Zou, Jungang; Gu, Chenyang; Ji, Jiayi; Lopez, Michael; Kale, Minal
作者单位:Rutgers University System; Rutgers University New Brunswick; Columbia University; Brown University; Icahn School of Medicine at Mount Sinai; Skidmore College; Icahn School of Medicine at Mount Sinai
摘要:In the absence of a randomized experiment, a key assumption for drawing causal inference about treatment effects is the ignorable treatment assignment. Violations of the ignorability assumption may lead to biased treatment effect estimates. Sensitivity analysis helps gauge how causal conclusions will be altered in response to the potential magnitude of departure from the ignorability assumption. However, sensitivity analysis approaches for unmeasured confounding in the context of multiple trea...