冯积岐小说论(上)——在回忆中凝视故乡

冯积岐所秉持的是一种独立的写作姿态,其写作方式及其作品所再现的生存经验与某一时期的写作主流是疏离的,他所讲述的"西部"也和主流批评界所想象的"西部"存在很大差异,所以,他的写作价值并没有被文坛、主流批评界、大众读者所真正认可.当代文坛存在着大量的像冯积岐这样的地方作家,他们的生存方式、写作方式、写作经验比较特殊,同样没有进入主流批评家的视野,在一种时代的"共名"状态下,他们的创作与存在往往被忽略或遮蔽.本文以冯积岐为个案,试图把一种地方性写作纳入自己的考察视野,其意义在于考察地方性的经验和记忆如何与人类共同的生存经验和记忆相链接,并以此反思当代文坛和批评界存在的问题.     

Pricing power options with a generalized jump diffusion

In this article, the valuation of power option is investigated when the dynamic of the stock price is governed by a generalized jump-diffusion Markov-modulated model. The systematic risk is characterized by the diffusion part, and the non systematic risk is characterized by the pure jump process. The jumps are described by a generalized renewal process with generalized jump amplitude. By introducing NASDAQ Index Model, their risk premium is identified respectively. A risk-neutral measure is identified by employing Esscher transform with two families of parameters, which represent the two parts risk premium. In this article, the non systematic risk premium is considered, based on which the price of power option is studied under the generalized jump-diffusion Markov-modulated model. In the case of a special renewal process with log double exponential jump amplitude, the accurate expressions for the Esscher parameters and the pricing formula are provided. By numerical simulation, the influence of the non systematic risk’s price and the index of the power options on the price of the option is depicted.     

A probabilistic approach to Wallis’ formula

We present an alternative proof of Wallis’ formula from the probabilistic point of view. Based on the classical central limit theorem, some discrete distributions with additive property, such as binomial, negative binomial, Poisson and multinomial distributions, are considered to derive π/2.     

Peeking into the past to plan the future: Assessing bird species richness in a neotropical city

Urbanization has been considered as a major threat to biodiversity, making its ecology of increasing interest. Many urban ecology studies have been developed in a short time-scale, measuring real-time patterns. However, long-term studies are imperative to understand the responses of some species to the urbanization process. In this study, we aimed to assess the information provided by a recent one-year citywide bird survey when compared to a published ‘historical’ bird list of a neotropical city (Xalapa, Mexico) that compiles information of the past three decades, mainly from urban greenspaces. Specifically, we contrasted species richness values and assessed differences in species composition between both lists. We recorded 51 species in the one-year citywide survey, representing ~15 % of those reported in the historical list. Nonetheless, the upper-bound confidence interval of the citywide survey richness prediction represented ~66 %. Most of the species recorded in the one-year citywide survey are insectivores and granivores, a pattern that agrees with previous findings that underline the importance of insectivores as part of urban bird communities in the Neotropics. Although we used robust methods to compare our one-year citywide bird list and the historical list for the city of Xalapa, we acknowledge the limitations of comparing them. However, our results shed some light on the kind and type of information that one-year citywide surveys can provide and the importance of long-term studies for comprehending the processes involved in biodiversity changes within urban areas over time. Undoubtedly, establishing long-term citywide surveys sampling birds and other biodiversity groups will allow us to better understand the response of biodiversity to urbanization over time.     

Participatory Art as a Social Practice of Commoning to Reinvent the Right to the City

The right to the city is a concept that helps rethink spatial–social dynamics, which has recently reinvigorated the field of organization studies. Following Lefebvre and considering the failure of both the market and the state, other scholars pinpoint the need to rethink social–spatial and geographical–historical relations. They do so by theorizing the city as a host for urban commons. Collective and non-commodified, these spatial–social experiences need to be constantly reproduced and preserved through commoning practices in the struggle against spatial injustice. A case study shows that a civil society organization (CSO) uses participatory art to (re)produce urban commons at the level of a local community and to redress partially spatial injustice. We theorize participatory art-making as a social practice of commoning, i.e., a process of organizing for the commons—collective art-based activities to serve a community—and of the common—to (re)produce a community while performing them. Such commoning practices are not only about sharing urban resources but also about using and experiencing differently urban spaces. By making participatory artworks in public spaces and co-designing street furniture with residents of poor areas, TDA helps to better cope with the tensions between residents and local authorities and between amateurs and professional artists. By negotiating the long-term implementation of these creative artworks in the public space with public authorities, TDA has fostered the empowerment of inhabitants as they have experienced citizens’ reappropriation of some public spaces in Marseille.     

QUALITY DIFFERENCES,THIRD‐DEGREE PRICE DISCRIMINATION,AND WELFARE

We propose a model with two markets to analyze the welfare implications of price discrimination with quality differences. In each market a local firm that operates in that market only competes against a global firm that operates in both markets. Local firms produce higher‐quality goods than the global firm. If the quality levels of the local firms' products are the same, price discrimination is never welfare‐decreasing. If they differ, discrimination is welfare‐increasing if quantity increases. Because of a positive allocation effect of price discrimination, there are parameter values such that welfare increases while total output decreases with price discrimination. (JEL D43, D60)     

传统民居色彩研究

针对传统民居色彩进行专项研究,试图通过一新的层面,即以民居色彩为一个整体效应来分析其形成因素和特征.依托四季色彩理论、色彩学、色彩地理学等相关学科,提出了色彩群理念,辨析了色彩群的内涵以及外延;并以不同的观察状态分析不同地域传统民居色彩群的特质.     

徐特立的教育中国化思想探析

针对全盘西化欧美的教育制度和照搬苏联的教育模式这样两种错误的倾向和做法,人民教育家徐特立在其光荣的革命和教育生涯中,从思想到实践始终较为自觉地进行抵制和引导。他坚持以马克思主义作为中国近现代教育事业发展的指导思想,提倡教育与劳动、理论与实践、学校与社会紧密结合,反对教条主义和经验主义,强调要建立民族化基础上的、科学的、大众的文化教育事业。     

俄语引语现象思辨——Л·Петрушевская短篇小说中的引语研究

对Л.Петрушевская短篇小说中新出现的引语现象,运用已有的俄语引语研究成果无力做出解释。中俄学界与欧美学界在引语研究领域有一些概念上的不同认识和理解,通过对其进行必要的分析,并借鉴欧美及国内英语学界在该领域及相关领域的研究成果,可以在一定程度上解决这些新问题。而在此基础上所提出的俄语引语的新体系：直接式引语和间接式引语;语境型引语和功能型引语,能够较为全面地解释Л.Петрушевская及俄罗斯其他后现代作家作品中出现的新的引语现象。     

地方综合性大学研究生招生质量分析——以宁夏大学为例

研究生招生工作是学位与研究生教育的基础工作,招生质量直接影响人才质量培养.本文以地方综合性大学宁夏大学为例,总结近五年招生整体情况,分析招生质量情况并提出建立招生质量保障体系的几点建议.