时滞脉冲双曲型泛函微分方程解的振动性

本文研究脉冲双曲型泛函微分方程解的振动性质,给出了解振动的充分条件.     

艺术体操不稳定平衡旋转训练仪的研制

艺术体操运动员在转体过程中要保持身体平衡就要调整身体姿态，尽可能地使人体转动轴始终通过人体总重心且垂直于支撑面。我们根据这一原理，研制了不稳定平衡旋转训练仪。它采用机械的手段，给运动员提供了一个更加不稳定平衡的转体环境，可以提高运动员在转体过程中维持身体平衡的能力。     

网络视频监控产品测试方案的改进设计

网络视频监控产品入网检测的关键在于采用的测试策略和测试方法。本文提出了验收该类产品的测试方案和测试策略，并以“守望精灵”网络视频监控平台为实例，对重要指标的测试用例进行了改进设计。实践证明改进后的方案具有较高的测试稳定性和较小的测试误差等优点。     

一类二阶泛函边值问题正解的存在性

讨论方程u″ h(t)f(u)=0在边界条件u'(0)=1乙0b(t)u'(t)dt,u(1)=t0乙0a(t)u(t)dt-1乙t0a(t)u(t)dt下正解的存在性,给出了该问题至少存在一个正解的存在性定理。     

馆藏特色数字资源众包对图书馆核心能力及组织边界的影响研究

文章以企业能力与组织边界相关研究成果为指导,结合目前已成功实施的部分图书馆众包案例,对馆藏特色数字资源的规划、建设与服务过程展开分析研究。文章认为馆藏特色数字资源众包不仅利于增强图书馆建设数字特藏的能力,也有利于提升馆员专业能力、提高用户满意度、提升图书馆知识服务与创新能力,进而增强图书馆核心能力,不断扩大组织边界。最后文章提出图书馆需重新审视功能定位,确保核心能力与竞争优势,真正服务于知识经济和现代信息社会的建设。     

Placing Facebook

Facebook is challenging professional journalism. These challenges were evident in three incidents from 2016: the allegation that Facebook privileged progressive-leaning news on its trending feature; Facebook’s removal of the Pulitzer Prize-winning “Napalm Girl” photo from the pages of prominent users; and the proliferation of “fake news” during the US presidential election. Using theoretical concepts from the field of boundary work, this paper examines how The Guardian, The New York Times, Columbia Journalism Review and Poynter editorialized Facebook’s role in these three incidents to discursively construct the boundary between the value of professional journalism to democracy and Facebook’s ascendant role in facilitating essential democratic functions. Findings reveal that these publications attempted to define Facebook as a news organization (i.e., include it within the boundaries of journalism) so that they could then criticize the company for not following duties traditionally incumbent upon news organizations (i.e., place it outside the boundaries of journalism). This paper advances scholarship that focuses on both inward and outward conceptions of boundary work, further explores the complex challenge of defining who a journalist is in the face of rapidly changing technological norms, and advances scholarship in the field of media ethics that positions ethical analysis at the institutional level.     

Press Credentials and Hybrid Boundary Zones: The Case of WorldNetDaily and the Standing Committee of Correspondents

ABSTRACT

Press credentialing practices are a vital, yet understudied site of scholarly research on journalistic norms and practices. Press credentialing not only structures internal professional hierarchies, but they also signify the boundaries of the journalistic field itself. This paper explores the legal and theoretical implications of press credentialing to cover the United States Congress, drawing on the concepts of boundary work and journalistic authority to demonstrate the material impact of the space between fields on professional legitimation in journalism. Using WorldNetDaily (WND) as a case study, I argue that the Standing Committee of Correspondents (SCC) occupies a hybrid boundary zone between the journalistic and political fields, generating a unique tension in First Amendment jurisprudence that places journalists in a paradoxical role as both the professional embodiments of free speech and its constitutional steward. The resulting jurisdictional conflict between the SCC and WND extends the relational model of journalistic authority by articulating how journalist-state relations can fundamentally augment the process of legitimation at its fuzzy boundaries. The relevance and implications for press credentialing practices in the digital age are discussed.     

论连结热力学过程两态的任意性

所谓连结两态热力学过程的任意性,指的是连系确定的始、终两态的可能热力学过程有无穷多,包括了各种可能的做功和吸热特性的过程,当然违反热力学第一定律的过程除外。因此,给定了始、终态后对连系它们的过程的做功和吸热的特性不可能作任何判断。     

环形域上的Dirichlet问题

讨论了Laplace方程在环形域上的Dirichlet问题的求解方法,给出了该问题的求解过程和Fourier级数解的结果,并指出了Poisson积分公式在具体求解中的不适应性,对于理解S-L方程在不同边界条件下,特别是自然边界条件和周期边界条件下的本征值问题具有重要意义.     

三论文艺美学的对象、范围和学科定位

艺美学不但是客观存在的，而且是学科发展的必然结果。艺美学不是传统的艺术哲学，也不是美学与艺学交叉产生的第三种学科，而是由哲学认识论、心理学、社会学、伦理学、生存实践等各种角度、多个层次、多种方法高度融合所规定的美学的中介学科和分支学科。艺美学具有独特的研究对象、内容和范围。同时它又是艺社会学、艺心理学的并列学科。