Rate efficient estimation of realized Laplace transform of volatility with microstructure noise

In this paper, we consider the problem of estimating the Laplace transform of volatility within a fixed time interval [0,T] using high‐frequency sampling, where we assume that the discretized observations of the latent process are contaminated by microstructure noise. We use the pre‐averaging approach to deal with the effect of microstructure noise. Under the high‐frequency scenario, we obtain a consistent estimator whose convergence rate is , which is known as the optimal convergence rate of the estimation of integrated volatility functionals under the presence of microstructure noise. The related central limit theorem is established. The simulation studies justify the finite‐sample performance of the proposed estimator.     

Application of FISK,an Invasiveness Screening Tool for Non‐Native Freshwater Fishes,in the Murray‐Darling Basin (Southeastern Australia)

The Fish Invasiveness Scoring Kit (FISK) is currently one of the most popular pre‐screening tools for freshwater fishes. A recent upgrade has ensured its wider climatic relevance to countries with subtropical regions. This enhancement is of particular importance to Australia, which encompasses tropical, arid, and temperate zones, and where the introduction of non‐native fish species poses a significant risk to biodiversity. In this study, 55 fish species previously evaluated in a U.K.‐based calibration of FISK are reassessed for their potential invasiveness in the Murray‐Darling Basin (MDB; southeastern Australia), the continent's largest catchment encompassing arid and temperate climates. Approximately half of the species were classed as “medium risk” and the other half as “high risk,” and the ≥19 threshold previously identified from the calibration study was confirmed. The three highest scoring species (common carp Cyprinus carpio carpio, goldfish Carassius auratus, and eastern mosquitofish Gambusia holbrooki) were those already present and invasive in the area, whereas nearly half of the tropical and subtropical species had lower scores compared to U.K. assessments, possibly because of climate change predictions of drier conditions across the MDB. There were some discordances between FISK and two Australian‐based assessment protocols, one of which is qualitative and the other represents a simplified version of FISK. Notably, the Australian origins of FISK should provide for an additional reason for further applications of the tool in other RA areas (i.e., drainage basins) of the continent, ultimately encouraging adoption as the country's reference screening tool for management and conservation purposes.     

Resettlement challenges faced by refugee claimant families in Montreal: lack of access to child care

Adult refugee claimants experience several well‐documented post‐migratory challenges. Little is known about the resettlement process for refugee claimant families with children. This study reports on 75 open‐ended, in‐depth interviews with refugee claimant families in Montreal about their resettlement challenges and their proposed solutions to them. These interviews were conducted with 33 dyads and triads of children and parents attending a paediatric hospital. Experiences accessing formal and informal child care in Montreal were addressed. Subsequently, a comparative policy analysis was conducted on residency eligibility criteria for child care subsidization. Twenty‐eight out of 39 parents (73%) report a lack of informal or formal child care and 15 out of 33 families (39%) propose improving access to formal child care services. They describe a lack of informal child care as a result of reduced social networks, and affordability as a barrier to formal child care services. Refugee claimants are not eligible for subsidized child care in Quebec. A comparative policy analysis within Canada and comparable countries reveals that this situation is not unique to Quebec. However, most provinces and European countries offer child care subsidies to refugee claimants. Refugee claimants should qualify for child care subsidies. Social workers and community organizations should consider their clients' child care needs in designing programmes and services.     

汉日反义词的对比研究

首先从词汇学的角度,对汉日反义词的概念作了简单的对比研究工作,归纳了汉日反义词概念的异同点,在此基础上就反义词的定义提出了自己的观点.其次通过对中日两国相关辞书、语言实践的对比分析,指出了汉日反义词在构成上,特别是否定接头词构成上的一些互动作用.希望能对语文教学以及对外汉语教学起到一定的参考作用.     

加强实践教学改革适应学生就业市场竞争

加强实践教学改革是面向 2 1世纪高等工科院校教育改革的需要 ,大学毕业生分配制度的改革也对实践教学环节提出了更高要求。我校给水排水工程专业对实践教学进行大胆创新 ,走出了一条“试用式”毕业实习及毕业实习、毕业设计“一条龙”的新路 ,突出了学生能力的培养 ,适应了愈来愈激烈的就业市场竞争需要     

论郭沫若的创造性思维体系

当前郭沫若研究中最迫切的课题是揭示郭沫若这一“球型天才”的创造之谜。郭沫若的价值在于他的创造。“泛神论”与其说是郭沫若的哲学思想 ,不如说是他的诗性思维方式。原逻辑思维是郭沫若创造性思维方式的生长点 ,“返祖”意识与当代意识构成郭沫若创造性思维体系中“叩其两端”的运思方式。从创造学的角度对这种思维方式进行分析 ,它呈现出整体性、运动性、开放性的总体特征。     

实现网络结点编号和添加虚工序的一种计算机处理方法

本文介绍一种算法,可对工程管理网络图的各个结点进行编号,并实现虚工序的自动添加。文末给出了算法的时间复杂度分析。     

Rushes in Large Timing Games

We develop a continuum player timing game that subsumes standard wars of attrition and pre‐emption games, and introduces a new rushes phenomenon. Payoffs are continuous and single‐peaked functions of the stopping time and stopping quantile. We show that if payoffs are hump‐shaped in the quantile, then a sudden “rush” of players stops in any Nash or subgame perfect equilibrium. Fear relaxes the first mover advantage in pre‐emption games, asking that the least quantile beat the average; greed relaxes the last mover advantage in wars of attrition, asking just that the last quantile payoff exceed the average. With greed, play is inefficiently late: an accelerating war of attrition starting at optimal time, followed by a rush. With fear, play is inefficiently early: a slowing pre‐emption game, ending at the optimal time, preceded by a rush. The theory predicts the length, duration, and intensity of stopping, and the size and timing of rushes, and offers insights for many common timing games.     

Attitudes of Palestinian pre‐school teachers from Israel towards reporting of suspected cases of child abuse and neglect

The paper documents a study conducted among 225 Palestinian pre‐school teachers from Israel. Data were collected through a self‐administered questionnaire that examined the teachers’ attitudes towards reporting child abuse and neglect. In general, the participants’ attitudes towards reporting child abuse and neglect to the child protection services (CPS) were more positive than their attitudes towards reporting to the police. Willingness to report suspected cases of child sexual abuse to the police and CPS was higher than willingness to report other types of child abuse and neglect. Inconsistent results were revealed with regard to how awareness of reporting regulations and awareness of signs and risk factors for child maltreatment affect willingness to report to CPS and to the police. A comprehensive discussion of the possible relevance of the participants’ socio‐cultural and sociopolitical values to their attitudes towards reporting child abuse and neglect is presented. The implications of the results for future studies are also discussed.     

论预售商品房权属之博弈

商品房预售在我国的房地产市场中已经成为主要的销售形式,而商品房预售的特殊性质决定了预售商品房上的权利主体较多,各权利主体均对预售商品房主张权利并由此产生争议。本文从司法实践中预售商品房上权利主体之争出发,探析预售商品房权属发生争议的原因,厘清预售商品房从开发公司建造房屋到预购人完成不动产物权登记期间,不同时间段预售商品房上权利主体及其所享有的权利性质,使各权利人明确自身权益并进行有效的权利救济。