陆生蓝藻地木耳中海藻糖研究初报   总被引：3，自引：0，他引：3  

李三相  李勃  左国防  杨亚军 《天水师范学院学报》2004,24(5):42-43

运用薄层层析法研究发现地木耳中含有海藻糖,不但提升了地木耳的应用价值,而且为海藻糖的开发提供新思路。  相似文献   

时滞脉冲双曲型泛函微分方程解的振动性     

薛秋条  张玉兰 《洛阳师范学院学报》2005,24(2):18-20,101

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.  相似文献   

略论合同约束力的层次性     

赵晓光 《锦州师范学院学报(哲学社会科学版)》2006,28(3):56-59

合同的约束力有三个层次：社会约束力;一般法律约束力;特别法律约束力.凡是成立的合同都具有第一层次的约束力;依法成立但未生效的合同具有一般法律约束力;依法成立并即时生效的合同具有特别法律约束力.约束力的层次是递进关系,高层次包含低层次.  相似文献   

赛艇运动员稳态心率的研究   总被引：3，自引：0，他引：3  

刘卫平  杜忠林 《湖北体育科技》2002,21(4):411-413

探讨了赛艇运动员在赛艇测功仪上作中等强度匀速运动时的稳态心率。  相似文献   

三元混配化合物的极谱研究--Phosphonic-、Amino-acid-Eu体系稳定性     

刘新文  卢小 《天水师范学院学报》2001,21(2):40-41

以脉冲极谱法研究了用有机磷酸和氨基酸作为配体与Eu(Ⅲ)形成两元及三元体系配合物的极谱行为.模拟生理条件,在μ=O.1(NaCl)、T=310±0.2K条件下,电极过程为准可逆;测定了配合物的稳定常数;讨论了复杂体系各配合物稳定性差异及其影响因素.  相似文献   

网络视频监控产品测试方案的改进设计     

蔡逆水  彭明星 《河北软件职业技术学院学报》2005,7(3):51-52,55

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。  相似文献   

一类二阶泛函边值问题正解的存在性     

沈文国 《天水师范学院学报》2006,26(2):10-11

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。  相似文献   

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     

黄婧  王琼 《图书馆》2022,(2)

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。  相似文献   

Placing Facebook     

Brett G. Johnson  Kimberly Kelling 《Journalism Practice》2018,12(7):817-833

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.  相似文献   

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

Jordan M. Foley 《Journalism Practice》2020,14(8):933-953

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.  相似文献