硅对304不锈钢GMAW高速焊接头组织性能的影响

以不锈钢焊丝中Si元素含量不同对高速焊焊后焊缝成形以及接头组织性能为研究目的,采用GMAW焊接工艺方法,借助扫描电镜、XRD衍射图谱、拉伸以及微观硬度等力学性能测试作为分析手段,深入研究Si元素在焊缝内部空间分布规律,及其对焊后成形焊缝组织和力学性能的影响规律. 结果表明,焊丝中存在特定含量的Si元素,不仅能够增加熔池金属流动性,提高焊接过程稳定性,改善焊后焊缝成形;同时焊接速度可以大幅提高至120 cm/min;由于Si元素的存在,GMAW高速焊焊后接头组织主要为奥氏体+δ铁素体,焊缝组织得到优化. XRD衍射图谱中发现焊后接头组织中存在马氏体和渗碳体,焊后接头微观硬度有所增加,拉伸性能基本持平,且在拉伸断裂前有明显的颈缩,塑性及抗拉强度良好.     

Introduction to the special issue on diversity and leadership.

Theories of leadership have neglected diversity issues. As the population within the United States and in countries throughout the world becomes increasingly diverse, the contexts in which leadership occurs within institutions and communities will also become increasingly diverse. Attention to diversity is not simply about representation of leaders from diverse groups in the ranks of leadership. Attention to diversity means paradigm shifts in our theories of leadership so as to make them inclusive; it means incorporating explanations of how dimensions of diversity shape our understanding of leadership. It means paying attention to the perceptions and expectations of diverse leaders by diverse followers and to how bias influences the exercise of leadership. Although leadership theories have evolved and reflect changing social contexts, they remain silent on issues of equity, diversity, and social justice. Theories of leadership need to be expanded to incorporate diversity if they are to be relevant for the 21st century amidst new social contexts, emerging global concerns, and changing population demographics. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

A Career in Planning

In this essay Christensen reviews her 50-year career as a planner, researcher, and teacher. A college summer internship in New York City exposed her to urban problems and initiatives, leading to her thesis and subsequent job at the U.S. Department of Housing and Urban Development, where she worked on interagency and intergovernmental projects. Later she studied at the University of California, Berkeley’s, Department of City and Regional Planning, where she became a member of the faculty. In her research and teaching she examined wicked planning problems (Rittel & Webber, 1973), uncertainty in planning, and organizational and intergovernmental decision making, as well as housing. To help students do better at doing good, she taught savvy through a course on planning institutions, and she continues to be engaged with planning theory.     

数控设备的管理和维修

做好数控设备的管理和维修,就要建立维修机构,制定和健全规章制度,建立完善的维修档案,建立基础管理信息库;数控设备的选型,也要考虑到维修的问题;坚持设备的正确使用,坚持设备运行中的巡回检查,利用系统自诊断,利用PLC程序定位机床与CNC系统接口的故障.     

International development projects by non-governmental organizations: an evaluation of the need for specific project management and appraisal tools

International development (ID) projects are pivotal in the field of international aid, but their actual impact is difficult to assess and often questioned. Focusing on non-governmental organizations (NGOs), in this paper we analyse two aspects related to the impact of ID projects. The first concerns the characteristics of ID projects. We reviewed the literature to define the distinctive features of these projects. Second, we analyse the state of the art of project management processes and tools for ID projects. In particular, we verify the differences between standard project management methodologies (i.e. PMBOK® Guide and IPMA) and the methodologies specifically developed for NGOs (i.e. PM4NGOs and PM4DEV). The results suggest the need for specific managerial approaches and tools for ID projects. In particular, we show that standard project management methodologies could be complemented by specific tools (e.g. the logical framework) in order to increase the likelihood that high social impact is the outcome of the project.     

Response to book reviews: Relating to my reviewers.

Responds to the reviews by K. O'Doherty (see record 2011-04026-005) and J. W. Clegg (see record 2011-04026-006) of the current author's book, Relational being: Beyond self and community (see record 2009-10534-000). One of my chief reactions to the resistances represented in these reviews is that the volume failed to make clear a vision of how we might go on together in the academic world where different viewpoints dominate. To elaborate: both reviewers take issue with my relational account in terms of its seeming dismissal or eradication of cherished concepts—including for Clegg, personal experience, genuine selfknowledge, and independent moral agency; and for O’Doherty, individual awareness, agency, and causality. In a certain sense their resistances are justified. My account raises critical concerns with such concepts, and in certain cases offers a radical reconceptualization. Both reviewers also suggest that these are questions of fundamental ontology, and offer arguments against what they see as my faulty foundations. However, as I tried to explain in the work, I approach theory development from a social constructionist perspective. This means replacing the traditional goal of the theorist to “tell the truth” about the world, with the attempt to generate an intelligibility that may foster different—and possibly more viable—forms of life. In effect, I am not attempting to articulate a final philosophy; I neither propose nor wish to argue ontology. From a constructionist perspective such arguments are futile; on what grounds other than those we construct could we settle such differences? Now to be fair, both Clegg and O’Doherty recognize this constructionist background, and my attempt to avoid eliminating alternative traditions or conceptions. However, this recognition does not deter them from returning to questions of fundamentals; they seem to want a knock-down conflict in which “justified true belief” will win out. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

地勘单位人力资源管理刍议

随着地勘单位企业化改革的不断深入,传统的人事管理已不能适应地质工作的快速发展和对人才的要求,亟需进行人力资源改革,通过分析地勘单位人事管理的现状,得出进行人力资源改革的必要性,进而提出相应的对策。     

大学生社团活动对高校思想政治教育工作的影响

思想政治教育工作在高校中占有举足轻重的地位,在以“育人”为核心的高校教育理念中,培养学生的综合素质是不可忽视的。大学生是高校思想政治教育工作的对象,同时也是社团活动的主体,社团顺应当前社会对大学生的要求,通过各类活动使学生得到锻炼,提高能力,培养学生全面发展,提高学生综合素质,同时,社团活动的开展为校园文化建设注入了活力,有助于培养学生健康向上的精神风貌,丰富高校校园文化内涵,活跃校园文化氛围。     

推行党委工作绩效管理评价体系的实践与探索

随着现代企业制度的不断建立和完善,如何使基层党的自身建设不断适应社会环境的变化和企业改革发展的需要,不断完善和改进基层党组织的管理体系,保证企业目标的顺利实现,是众多企业党组织多年来孜孜以求,不断探索的目标。文章结合承载潞安新时期国企党建的特殊载体党委工作绩效管理评价体系在漳村煤矿的运用,阐述了基层党委如何在具体的工作实践中,大胆探索,积极创新,力促经济建设又好又快发展,对基层党建工作如何服从服务于企业中心的课题带来了全新的思考。     

计算数学组织理论

计算数学组织理论是采用计算和数学手段来研究人类组织的理论,是对传统组织科学一个新的领域拓展,这一领域的研究内容包括组织学习、组织适应性、组织演化、多主体系统和组织设计等等,其理论成果被广泛应用于敏捷制造、网络组织和虚拟组织的设计、战场C2结构设计等。文章综述了计算数学组织理论的发展及现状,概括了这一理论研究的内容以及相关领域的研究,并提出了类组织的概念。