نتایج جستجو برای: stocks ranking

تعداد نتایج: 49996  

Journal: :ACM Computing Surveys 2022

In the past few years, there has been much work on incorporating fairness requirements into algorithmic rankers, with contributions coming from data management, algorithms, information retrieval, and recommender systems communities. this survey, we give a systematic overview of work, offering broad perspective that connects formalizations approaches across sub-fields. An important contribution ...

Journal: :Conservation biology : the journal of the Society for Conservation Biology 2011
Trevor A Branch Olaf P Jensen Daniel Ricard Yimin Ye Ray Hilborn

There are differences in perception of the status of fisheries around the world that may partly stem from how data on trends in catches over time have been used. On the basis of catch trends, it has been suggested that about 70% of all stocks are overexploited due to unsustainable harvesting and 30% of all stocks have collapsed to <10% of unfished levels. Catch trends also suggest that over tim...

Journal: :Computational Linguistics 2001
Joel R. Tetreaul

In this paperwe comparepronoun resolution algorithmsand introduce a centering algorithm(LeftRightCentering) that adheres to the constraints and rules of centering theory and is an alternative to Brennan, Friedman, and Pollard’s (1987) algorithm. We then use the Left-Right Centering algorithm to see if two psycholinguistic claims on Cf-list ranking will actually improve pronoun resolution accura...

2013
Cheng Guo Yu Bai Jianxi Zheng Dongfeng Cai

This paper describes the approaches and results of our system for the NTCIR-10 INTENT task. We present some methods for Subtopic Mining subtask and Document Ranking subtask. In the Subtopic Mining subtask, we employ a voting method to rank candidate subtopics and semantic resource HowNet was used to merge those candidate subtopics which may impact diversity. In the Document Ranking Subtask, we ...

Journal: :J. Informetrics 2010
Loet Leydesdorff Tobias Opthof

Van Raan et al. (2010) accepted our critique for the case of journal normalization (previously CPP/JCSm); CWTS has in the meantime adapted its procedures. However, a new indicator was proposed for field normalization (previously CPP/FCSm), called the “mean normalized citation score” (MNCS; cf. Lundberg, 2007). In our opinion, this latter change does not sufficiently resolve the problems. Since ...

2013
Maria Fernanda Adame J. Boone Kauffman Israel Medina Julieta N. Gamboa Olmo Torres Juan P. Caamal Miriam Reza Jorge A. Herrera-Silveira

Coastal wetlands can have exceptionally large carbon (C) stocks and their protection and restoration would constitute an effective mitigation strategy to climate change. Inclusion of coastal ecosystems in mitigation strategies requires quantification of carbon stocks in order to calculate emissions or sequestration through time. In this study, we quantified the ecosystem C stocks of coastal wet...

2009
Guangzi Li Guozheng Tang Li Liu Harold Zhang Yu-jane Liu Dehua Xiong Chao Chen Hongjun Zhu Yihui Lan Pingyang Gao Dong Luo Rong Lu Xiongguang Fu Minshan Zhou

Using a unique sample of matching stocks in China, this paper investigates the comovement between different stocks and its driving factors. Major findings include: (1) There exists a high positive correlation between returns on two matching stocks with similar ticker symbols; (2) By analyzing changes in correlation that took place after stocks changed their ticker symbols, we find that changes ...

Journal: :CoRR 2013
Andreas Kosmatopoulos Kostas Tsichlas

Let S be a dataset of n 2-dimensional points. The top-k dominating query aims to report the k points that dominate the most points in S . A point p dominates a point q iff all coordinates of p are smaller than or equal to those of q and at least one of them is strictly smaller. The top-k dominating query combines the dominance concept of maxima queries with the ranking function of top-k queries...

2009
Zina M. Ibrahim Ahmed Y. Tawfik Alioune Ngom

This paper introduces a qualitative ranking function that uses signed integers to describe the surprise associated with the occurrence of events. The measure introduced, κ, is based on the κ calculus but differs from it in that its semantics enable an explicit representation of complements. As a result, the κ is more capable of enforcing probability theory-like constraints to carry on reasoning.

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