多时空交通圈的内涵、划分及其特征分析

空间和时间因素构成的时空关系或时空结构是进行区域研究的重要视角,众多研究者对区域分析中的空间、时间因素及时空分析框架进行了论述,并提出时距、等时圈、时空圈、经济圈等重要概念。基于这些分析,中心城市对外多时空交通圈就是以多种交通方式衡量的、不同时空距离的时空圈总和,其时空圈具有中心—辐射、时空收敛、非连续性、非对称性的基本特征;而按照公共交通方式时距3小时为界可将中心城市时空圈划分为近距离时空圈和远距离时空圈两大类,不同时空圈具有不同的经济活动特征。     

大学“数字校园”规划分析

本文根据国内数字化校园发展现状 ,结合大学“数字校园”建设中的实际 ,总结出数字校园建设规划和具体实施工作中的理论框架 ,即一个平台、一个门户和N个应用、N个管理、N个服务的理论思想。采用结构化的规划分析方法 ,给出了由系统目标模型归纳出对应系统设计模型的方法     

远程教育大有可为

介绍远程教育的基本概念、国内外发展情况,阐述远程教育的意义、目标和实现的功能以及社会经济效益。     

The determination of the least distance to the strongly efficient frontier in Data Envelopment Analysis oriented models: Modelling and computational aspects

Determining the least distance to the efficient frontier for estimating technical inefficiency, with the consequent determination of closest targets, has been one of the relevant issues in recent Data Envelopment Analysis literature. This new paradigm contrasts with traditional approaches, which yield furthest targets. In this respect, some techniques have been proposed in order to implement the new paradigm. A group of these techniques is based on identifying all the efficient faces of the polyhedral production possibility set and, therefore, is associated with the resolution of a NP-hard problem. In contrast, a second group proposes different models and particular algorithms to solve the problem avoiding the explicit identification of all these faces. These techniques have been applied more or less successfully. Nonetheless, the new paradigm is still unsatisfactory and incomplete to a certain extent. One of these challenges is that related to measuring technical inefficiency in the context of oriented models, i.e., models that aim at changing inputs or outputs but not both. In this paper, we show that existing specific techniques for determining the least distance without identifying explicitly the frontier structure for graph measures, which change inputs and outputs at the same time, do not work for oriented models. Consequently, a new methodology for satisfactorily implementing these situations is proposed. Finally, the new approach is empirically checked by using a recent PISA database consisting of 902 schools.     

Student isolation: the experience of distance on an international field placement

In an era of global awareness of the impact of social, political and environmental impact, the international field placement has become a feature of many social work programmes throughout Australia. A theoretical framework of international social work principles allows for a guiding platform for teaching and learning; however, the experience of the social work student is often one of cultural isolation and emotional vulnerabilities. Whilst cross-cultural learning is a core practice goal of the placement, the ability to engage with this learning is affected by the impact of distance on the student. In turn, the university responsibility for the student is heightened by the distance involved, creating an increased sense of risk for both the student and the social work educator. This article draws on a mixed-methods study, with data sourced from both questionnaires and in-depth interviews with university field education staff, former social work students, and field educators. Five lenses of distance are explored in the aim of increasing understanding of the student experience: geographical distance, cultural distance, emotional distance, pedagogical distance and technological distance. In doing so, the social work educators’ ability to monitor and support remote students is enhanced, and the capacity for the student to engage in a positive teaching and learning environment is increased.     

Disembodied politics: commitment and formal distance in Rancière*

Abstract

In light of the theme and concerns of the present collection of essays, we may ask whether ‘distance in general’, and ‘critical distance in particular’ (Fredric Jameson), has truly disappeared with postmodernity. Proposing an immediate and interruptive political engagement with local issues, Jacques Rancière’s articulation of political mobilisation does seem to confirm this claim. Upon further inspection, however, his emancipatory politics repeat the same mistake of valuing an abstract universal at the expense of a concrete particular, however paradoxical this may seem at first sight. The present article develops this thesis in three moments. On the first hand, it highlights Rancière’s notion of conflict as being institutive of politics. Secondly, it connects this ‘sensible’, and Rancière’s understanding of politics as being aesthetic, to Kant’s ‘Transcendental Aesthetics’. The French author sees in the leading section of the first Critique the grounding possibility of (I) freeing up time and space within the social realm; (II) the representation of a common political surface that can be reshaped; (III) political equality; (IV) emancipation. The last section shows how this recourse to the transcendental subject in Rancière’s politics follows and embraces a traditional position in the history of philosophy whereby identity is denigrated at the profit of a disembodied universalism.     

Critical proximity

Abstract

This article explores the relationship between critical distance and the idea of proximity. In times that are often described as ‘global’, ‘24/7’, ‘connected’, ‘networked’ and ‘immersive’, distance seems ever reduced and proximity omnipresent. The contemporary impression of ubiquitous proximity might constitute a threat to the survival of critical distance understood either as a cornerstone of enlightened and humanist critical practice or as a key metaphysical ‘technology’. The resulting ‘crisis of critical distance’ produces the question of how to position oneself with regard to the ‘other’ in a time that lacks distance and privileges proximity? In tracking the ambiguity (or the ‘aporia’) that surrounds proximity – the desire to be near and the need to maintain a distance – this article rereads some key Heideggerian and Derridean texts in order to attempt a deconstruction of the opposition of distance and proximity at work in the ‘metaphysics of presence’.     

Laughing otherwise: comic-critical approaches in alternative comedy

Abstract

The origins of ‘alternative comedy’ are difficult to pinpoint, though it coincided with the rise of Thatcher as Prime Minister in 1979 – that year saw the appearance of something called ‘alternative cabaret’, a term usually associated with Tony Allen, who combined activism and comedy. The acts this article will focus on are those which took a critical approach to comedy and/or politics – ‘alternative’ comedy (or altcom), therefore, as seeming to promise change through critical awareness. This paper will discuss parody as a means of critical (dis)engagement and transformation, in relation to context, and to influences such as punk. Altcom demonstrates an apparent eschewal of approaches which rely on irony and ambiguity, in favour of more ‘direct’ political engagement. It will be argued however that such ‘direct’ approach does not cancel out critical distance, but rather seeks alternative routes to establish it – namely comic and parodic overstatement, and the problematisation of ‘trust’. This entails the key questions of whether parody may take up critical distance without irony, as well as of the political implications of an approach which seeks to eliminate ambiguity. This more ‘direct’ approach however still depends on a balance of engagement and disengagement, requiring distancing from pre-established codes.     

Multi-objective fuzzy flexible job shop scheduling using memetic algorithm

Multi-objective flexible job shop scheduling problem with fuzzy processing time and fuzzy due date is a complicated combinatorial optimization problem. In this paper, a genetic global optimization is combined with a local search method to construct an effective memetic algorithm (MA) for simultaneously optimizing fuzzy makespan, average agreement index and minimal agreement index. First, a hybridization of different machine assignment methods with different operation sequence rules is proposed to generate a high-performance initial population. Second, the algorithm framework similar to the non-dominated sorting genetic algorithm II (NSGA-II) is adopted, in which a well-designed chromosome decoding method and two effective genetic operators are used. Then, a novel fuzzy Pareto dominance relationship based on the possibility degree and a modified crowding distance measure are defined and further employed to modify the fast non-dominated sorting. Next, a novel local search is incorporated into NSGA-II, where some candidate individuals are selected from the offspring population to experience variable neighbourhood local search by using the selection mechanism. In the experiment, the influence of four key parameters is investigated based on the Taguchi method of design of experiment. Finally, some comparisons are carried out with other existing algorithms on benchmark instances, and demonstrate the effectiveness of the proposed MA.     

Covariate selection for accelerated failure time data

Selection of appropriate predictors for right censored time to event data is very often encountered by the practitioners. We consider the ?₁ penalized regression or “least absolute shrinkage and selection operator” as a tool for predictor selection in association with accelerated failure time model. The choice of the penalizing parameter λ is crucial to identify the correct set of covariates. In this paper, we propose an information theory-based method to choose λ under log-normal distribution. Furthermore, an efficient algorithm is discussed in the same context. The performance of the proposed λ and the algorithm is illustrated through simulation studies and a real data analysis. The convergence of the algorithm is also discussed.