《学衡》论学者精神与责任

《学衡》杂志以“论究学术 ,阐求真理 ,昌明国故 ,融化新知”为宗旨 ,对 2 0世纪初期的学术弊端提出了严厉批评 ,并在此基础上呼唤对真正的学术精神的追求 ,即自信、自得、贞操、求真、审慎、创造、社会关怀和追求文德之精神 ,同时提出了学者对于前人、今人和世界的责任。     

网络工期成本优化技术

本文提出利用列表和在表上逐步进行修改,最终得到工期成本优化问题的最优解的方法。该方法的特点是直观、易于操作。     

The Multiscale Importance of Road Segments in a Network Disruption Scenario: A Risk‐Based Approach

This article addresses the problem of the multiscale importance of road networks, with the aim of helping to establish a more resilient network in the event of a road disruption scenario. A new model for identifying the most important roads is described and applied on a local and regional scale. The work presented here represents a step forward, since it focuses on the interaction between identifying the most important roads in a network that connect people and health services, the specificity of the natural hazards that threaten the normal functioning of the network, and an assessment of the consequences of three real‐world interruptions from a multiscale perspective. The case studies concern three different past events: road interruptions due to a flood, a forest fire, and a mass movement. On the basis of the results obtained, it is possible to establish the roads for which risk management should be a priority. The multiscale perspective shows that in a road interruption the regional system may have the capacity to reorganize itself, although the interruption may have consequences for local dynamics. Coordination between local and regional scales is therefore important. The model proposed here allows for the scaling of emergency response facilities and human and physical resources. It represents an innovative approach to defining priorities, not only in the prevention phase but also in terms of the response to natural disasters, such as awareness of the consequences of road disruption for the rescue services sent out to local communities.     

Topological Performance Measures as Surrogates for Physical Flow Models for Risk and Vulnerability Analysis for Electric Power Systems

Critical infrastructure systems must be both robust and resilient in order to ensure the functioning of society. To improve the performance of such systems, we often use risk and vulnerability analysis to find and address system weaknesses. A critical component of such analyses is the ability to accurately determine the negative consequences of various types of failures in the system. Numerous mathematical and simulation models exist that can be used to this end. However, there are relatively few studies comparing the implications of using different modeling approaches in the context of comprehensive risk analysis of critical infrastructures. In this article, we suggest a classification of these models, which span from simple topologically‐oriented models to advanced physical‐flow‐based models. Here, we focus on electric power systems and present a study aimed at understanding the tradeoffs between simplicity and fidelity in models used in the context of risk analysis. Specifically, the purpose of this article is to compare performance estimates achieved with a spectrum of approaches typically used for risk and vulnerability analysis of electric power systems and evaluate if more simplified topological measures can be combined using statistical methods to be used as a surrogate for physical flow models. The results of our work provide guidance as to appropriate models or combinations of models to use when analyzing large‐scale critical infrastructure systems, where simulation times quickly become insurmountable when using more advanced models, severely limiting the extent of analyses that can be performed.     

综合阻尼系统的模态分析和时序模型

本文定义同时计及粘性阻尼和结构阻尼的系统为综合阻尼系统。讨论了多自由度比例综合阻尼系统的模态分析。推导出传递函数矩阵的表达式。应用拉氏变换和Z变换间关系,得到系统的ARMA时间序列模型。     

Evaluations of Social Work Education: A Critical Review

Since the introduction in England of the social work degree in 2002, there have been a number of significant changes to social work education culminating with the implementation of the Social Work Reform Board's innovations in 2013. This article critically explores the role of evaluations of changes in social work education and their implications for social work pedagogy. Evaluations can be linked to wider trends in society such as modernity, reflexive modernity, and the audit society. These wider influences affect the use of evaluations. A way forward for social work is proposed. Social work education needs to develop a critical pedagogy of hope to transform the profession's relationship not only to evaluations but to practise as well. The key message of this article is that evaluation studies of social work education mirror the underlying tensions of late modernity. Therefore, social work education needs to adopt a critical pedagogic approach to the use of evaluation research.     

The Struggle for the Soul of Social Work in England

There is a debate or struggle for the nature and future of social work in England. This tension is between a narrow or limited type of practice and a broader and emancipatory social work, grounded in the International Federation of Social Work and the wider conception of the profession in other European states. The limited model of social work seems to provide a dominant paradigm, which may result in the loss of a more visionary and humane social work. This is a qualitative study of an undergraduate social work programme in England. There were 48 participants, comprised of academics, students, service users and practice educators. Interviews and focus groups were used and a thematic analysis was undertaken. The key finding of this study is that the paradigm of state or statutory social work in England threatens to replace a broad conception of social work as understood in such definitions as the International Federation of Social Work and social work in other European states.     

The Integration of Personal and Professional Selves: Developing Students' Critical Awareness in Social Work Practice

How social work students incorporate personal and professional selves in the contexts of field education represents a cornerstone of effective and sustainable practice. This paper presents a qualitative component of a study that tracked 15 third-year bachelor of social work students across their first field placement to document their use of self, critical reflections and experiential learning. The project examined students' assessed ‘use of self’ assignments to understand their capacity for and development of critical awareness across this placement. Students were most articulate in being able to identify stressful situations that arose from placement in terms of what they were thinking (mind) and feeling (emotion) and to a much lesser extent to what they were sensing (body). Over time, students demonstrated a growing critical awareness to better identify and respond to their self-reported tensions. The findings provide developmental insights into how students integrate personal and professional selves and potentially shift from reflective and reflexive practices to incorporating praxis in their work. Through considering the linkages between self and practice, this paper explores student experiences whilst on placement and the associated developmental tasks of critical awareness.     

基于认知分层理论的外语思辨能力研究

思辨能力培养是我国外语专业教学的薄弱环节,更是外语人才培养的软肋。外语专业教学必须以培养学生的思辨能力为导向,纠正影响思辨能力发展的外部因素。文章基于布鲁姆认知能力分层理论,以具体的写作课、语言学课、英语演讲课为例,从不同角度、不同内容和不同层次对思辨能力的培养纳入外语专业的教育过程进行了详实阐述,所以只有提升外语专业学生的思辨能力,才能提高外语人才的培养质量。     

THE CHOICE BETWEEN SETS OF REGRESSORS

This paper examines the choice of critical values for testing both non-sequential and nested sequential sets of constraints in the standard linear regression model. Modest increases in (e.g.) t-ratio critical values relative to their one-off values are often sufficient to maintain proper size. A Bayesian decision-theoretic approach, highlighted by the Schwarz (1978) criterion, provides a framework for deriving consistency and asymptotic local power properties of both forms of testing (data mining) algorithms.