当前我国高校非学历教育发展现状及趋势分析

本文阐述高校发展非学历教育的必要性及其发展趋势。     

The local geographies of welfare in Tunisia: Does neighbourhood matter?*

Amara M, Ayadi M. The local geographies of welfare in Tunisia: Does neighbourhood matter? The aim of this article is to show that spatial analysis techniques outperform non‐spatial statistical counterparts for understanding the geographic determinants of welfare and poverty in Tunisia. First, an Exploratory Spatial Data Analysis, based on a Geographical Information System, was conducted to visualise the local spatial structure of welfare. Second, a spatial autoregressive (SAR) model and a geographically weighted regression (GWR) model, respectively, were used to deal with both spatial autocorrelations and unobserved spatial heterogeneity of households' behaviours. Spatial and non‐spatial models were compared according to their predictive performances. Results of this case study confirm that SAR and GWR spatial models are preferable to the traditional non‐spatial regression model and that they give a better approximation of the Tunisian poverty map.     

反周期J-自伴Hill算子的谱

给出了带有复值周期系数q（x）=^∞Σk=1ake^ikx（其中^∞Σk=1∣ak∣〈∞）的常型J-自伴Hill算子在反周期边界条件下的Floquet判别式及其谱.     

Organizational Sustainability and Systemic Boundary Processes

Abstract

Every day, managers work to sustain the organizations wherein they work. In this article, the authors examine certain systemic boundary processes that are intrinsic to organizations and their sustainability. For readers of this journal, whose name points to the inherent connection between organizations and society, the authors present an argument that organizational boundary processes and their influence on organizational sustainability are important considerations for those of us interested in a viable future for our society. The importance of these processes for managers also is indicated.     

Non‐accidental injury and bone fragility disorders: the need for a multidisciplinary perspective

A case is presented of a child who was initially diagnosed with osteogenesis imperfecta following a skull fracture. However, she later presented with multiple fractures and soft tissue injuries which were considered to be due to non‐accidental injury. It can be perplexing distinguishing accidental and non‐accidental injury in children where a bone fragility disorder has been suspected. A combination of a careful review of the history, a thorough examination and expert review of the radiology is imperative. DNA testing can be helpful. Multidisciplinary case review, taking into account the social history and any concerns professionals have about the family, is invaluable in informing a difficult diagnosis. In this context, there is a definite role for other agencies in challenging the diagnosis or exclusion of non‐accidental injury. Professionals should be willing to challenge the exclusion of non‐accidental injury when such exclusion is not evidence based. Copyright © 2009 John Wiley & Sons, Ltd.     

对常规注水泥温度场预测方法的评价

为了对常规注水泥温度场预测方法进行研究评价,分析了API方法和一些常用的经验方法,并对API公布的数据和国内首次实测的大量井下循环温度实际数据进行了对比,结果表明:常规预测温度的方法其平均相对误差均高于5%;虽然对于不同井深和不同的循环时间条件可以采用不同的经验系数由地层静止温度(BHST)来估计井下循环温度,但该方法受到地区和各种因素的限制,时常与实际差别较大,不可能很好地满足钻井和固井施工的要求。要获取更准确的井下温度分布,应加强对本地区井下循环温度的实测和热交换过程的计算机模拟研究。     

一类n阶非线性微分方程多点边值问题解的唯一性

本文利用Leray-Schauder度理论建立了n阶非线性微分方程y(n)=f(x,y,y′,…y(n-1)),0