Model-based hierarchical clustering with Bregman divergences and Fishers mixture model: application to depth image analysis

Model-based clustering is a method that clusters data with an assumption of a statistical model structure. In this paper, we propose a novel model-based hierarchical clustering method for a finite statistical mixture model based on the Fisher distribution. The main foci of the proposed method are: (a) provide efficient solution to estimate the parameters of a Fisher mixture model (FMM); (b) generate a hierarchy of FMMs and (c) select the optimal model. To this aim, we develop a Bregman soft clustering method for FMM. Our model estimation strategy exploits Bregman divergence and hierarchical agglomerative clustering. Whereas, our model selection strategy comprises a parsimony-based approach and an evaluation graph-based approach. We empirically validate our proposed method by applying it on simulated data. Next, we apply the method on real data to perform depth image analysis. We demonstrate that the proposed clustering method can be used as a potential tool for unsupervised depth image analysis.     

张竹坡评点《金瓶梅》动因论析

张竹坡评点《金瓶梅》有两方面的缘由：一是揭示小说文本中蕴含的文法,二是心有寄托。寄托主要包括三点：一,借评点《金瓶梅》感慨人情冷暖,世态炎凉;二,借评点表达科场数次失利之后,对功名既失望又有期望的复杂心理;三,表达对孝德推崇以及笃孝的自豪。寄托是评点的主要动因,这也就导致了张竹坡《金瓶梅》评点主观性过强。
     

比较视野下的数据权属立法研究

大数据背景下,数据产业不正常竞争乱象丛生,个人信息被泄露和滥用事件频发,使得数据保护与数据利用之间的矛盾日益凸显。《个人信息保护法》为数据上的人格性权利提供了法律保障,而数据的财产性权利却没有专门的法律保护。企业之间的数据财产权利该如何配置,以及数据作为新型财产该如何对其进行保护的问题仍未解决。借鉴国外经验,我国亟需构建以个人信息保护为基础,以部分数据权利财产化为主要手段的数据确权体系,完善数据领域反不正当竞争规则,促进数据流通与数据市场健康发展。     

Helping Students Starting a Social Work Qualifying Programme to Learn More Effectively

This paper gives an account of how Meyer's Reflections on Learning Inventory (RoLI) was used with groups of UK social work students embarking on their professional training in higher education, to assist them to reflect on their approaches to learning and the implications for their chosen career. Social work students were offered the opportunity to complete an inventory during the induction week of their qualifying award programme. They were provided with an analysis, which they then discussed with their tutor. As a result of this, students were required to produce a brief plan outlining what they had learned and how they could address any issues arising. The original profiles of the students were compared with their end of first year assessments. The RoLIs were found to be a sound indicator of those students ‘at risk’ of failing and proved a useful trigger for reflection on learning for most students.     

Doctoral Education in Social Work: The Decade Ahead

ABSTRACT

Scientific and professional developments in the coming decade will have profound implications for social work doctoral education and the research and academic careers doctoral students are preparing for. These developments include the knowledge explosion, corporatization of the university and related effects, and the emergence of the Grand Challenges for Social Work initiative delimiting key directions for social work research and practice. We consider potential effects of these developments on doctoral social work education and proffer curricular, pedagogic, and programmatic recommendations for improving doctoral education in the coming decade.     

National,Ethnic and Religious Identities: Hybridity and the case of the Polish Tatars

Questions of hybridity and multiple identities are over-theorised but the number of empirical studies is limited. The present study examines some of the discursive devices used in two Polish Tatar magazines for managing narratives about their national, ethnic and religious identities. The Polish Tatars are a numerically small group that have lived for more than 600 years in Catholic Poland. For them, being a Tatar, Muslim and Pole at the same time, is central to their self-understanding, and they do not want to limit the importance of any of these. Two main strategies of narrative identity management were identified, related to identity definitions and identity connections. The former gives layered understandings about Polish Tatar identity: a factual one in which a local and historical connection is made and a spiritual one in which belonging to an imagined symbolic community is stressed. The latter provides reconciliation between identities by stressing their similarities and relations, by emphasizing the contributions made by Tatars to Polish society, and by presenting the Tatars as potentially being in a unique mediating position between Islam and Christianity. In the near future, Tatars’ strategies for creating a hybrid identity might be challenged by global and more local developments.     

以数字中国建设赋能经济高质量发展

数字中国是涵盖数字经济、数字社会、数字政府和数字生态等多个维度的综合性发展战略。实施国家数字中国战略,有助于通过营造良好数字生态来抢抓数字经济发展新机遇,切实赋能高质量发展,构建新发展格局并提高国际竞争力。在作用机理上,数字中国建设能够强化创新驱动、协调区域发展、保障绿色发展、促进开放发展、推动共享发展。因此,加快构建新发展格局,着力推动高质量发展需要强化数字基础设施建设、加快产业数字化转型、高质量建设数据要素市场、提升公共服务数字化水平以及完善数字化治理体系。