Abstract Relational extraction plays an important role in the field of natural language processing to predict semantic relationships between entities a sentence. Currently, most models have typically utilized tools capture high-level features with attention mechanism mitigate adverse effects noise sentences for prediction results. However, task relational classification, these mechanisms do not...

Since the late 1980s, the new phenomena of 'employment subcentres' or 'polycentricity' has appeared in the metropolises of North American and Western Europe and it has been an interesting topic for academics and researchers. This paper specifically uses one case study-Guangzhou to explore the development and the mechanism of employment subcentres and polycentricity in Chinese metropolises by sp...

a r t i c l e i n f o Available online xxxx JEL classifications: O33 O34 O41 Keywords: Intellectual Property Rights (IPR) Economic growth North–south model In this paper, we develop a general equilibrium endogenous growth model that emphasizes the IPR enforcement effects on growth, in a scenario of north–south technological knowledge diffusion. The economy consists of three sectors, and firms a...

Using copulas, in this paper we investigate the static and dynamic extreme dependence of international stock markets. We examine both the structure and the degree of the dependence. The data set are daily returns on the stock indices from countries in North America, Europe and East Asia. The results show signi…cant asymmetric tail dependence in most of the return pairs, with the overall lower t...

A recent analysis of the He abundance determined from observations of extragalactic HII regions indicates a significantly greater uncertainty for the He mass fraction. The derived value is now in line with predictions from big bang nucleosynthesis when the baryon density determined by WMAP is assumed. Based on this new analysis of He, we derive constraints on a host of particle properties which...

Founding harmonic analysis on classical simple complex groups, I.M. Gelfand and M.A. Naimark in their classical book [GN] posed three basic questions: unitary duals, characters of irreducible unitary representations and Plancherel measures. In the case of reductive p-adic groups, the only series of reductive groups where unitary duals are known are general linear groups. In this paper we reduce...