广义冠状系统中有关共轭圈的一个注记

克库勒结构和共轭圈对于苯环系统或冠状系统的分类及其结构特征的刻画起着重要作用,因此有关共轭圈的研究及其结果在诸多文献中出现.文章就广义冠状系统给出其有关共轭圈的下列结果：一个至多含有两条悬挂边且含有克库勒结构M的广义冠状系统必有一个M-共轭圈等.     

信任模型及其改进研究

在分析现有信任模型不足的基础上,提出一个改进的信任模型。改进后的信任模型增加了事务因素,并通过一系列函数来描述信任,为协同与安全决策提供依据。同时将信任值区间扩大,增加实体表达自身认知的方法,使得信任度连续化,可以更加有效地解决信任管理问题。     

一种基于相似度和信任度融合的微博内容推荐方法

[目的/意义]微博对用户获取信息和建立社交网络具有重要作用。提出一种基于相似度和信任度融合的微博内容推荐方法,能够从用户需求出发进行个性化微博内容推荐,对提高微博服务质量、改善信息过载问题具有意义。[方法/过程]基于相似度和信任度融合算法,构建微博内容推荐模型,以新浪微博为研究对象,采用编程方式获取汽车、体育、运动健身、互联网和财经5个领域的数据,展开用户相似度与信任度计算的实验分析和比较。[结果/结论]分析结果显示该方法可以有效表示和挖掘微博内容,改善微博推荐的准确性和用户满意度。     

If Only They Knew: Audience Expectations and Actual Sourcing Practices in Online Journalism

ABSTRACT

This article answers the question “Are the sourcing practices in Finnish online journalism trustworthy?” Here, trustworthiness is operationalized as the fulfillment of audience expectations towards sourcing practices. To this end, expectations of young Finnish adults (aged 18–28) were compared to the observed practices of Finnish online journalists. A total of 36 news items (from 12 journalists working in three newsrooms, published in 2013 and 2017) were analyzed. The analysis indicates that online journalists’ sourcing practices largely do not conform to this audience segment's expectations. Namely, the audience expects more comprehensive investigation and thorough verification than what is common practice in online journalism. The use of high-credibility sources is both expected and commonplace. The results imply that transparency may be harmful rather than beneficial to journalism's credibility, as the unveiled practices do not always meet audience expectations.     

知识员工对雇主信任的影响因素研究

文章首先对知识员工、雇主以及知识员工对雇主信任的概念进行了界定。在对大量相关文献进行梳理的基础上，结合知识员工对雇主信任的特征，归纳出信任的五个影响因素，分别为：雇主的正直、能力、关心、公平以及提供的报酬。进而提出相关性和影响性两组假设，并构建出知识员工对雇主信任影响因素的概念模型。实证部分在问卷设计和样本收集的基础上，使用SPSS软件对数据进行处理，利用相关分析、回归分析对文中的假设进行检验，最后得出结论：雇主的正直、能力、关心、公平，是知识员工对雇主信任的四个影响因素，并具有显著的影响效果。     

广义马氏过程及其熵率

讨论了k步广义马氏过程及其时间不变性和平稳性，给出了熵率的两种定义，说明了其等价性，还给出了平稳的广义马氏链熵率的计算公式．     

斡脱：蒙元时期民事制度的一个创新

本是对蒙元时期的特殊商业现象——斡脱进行研究。首先，对蒙元时期的斡脱语义进行了分析，认为在蒙古族中早就有发这个音的词，后来西域人到蒙古国后，这个词出现了多种意义，其中之一是成为一种商业的专称。其次，本重点论证了斡脱作为一种民事行为相当于现代的信托行为。最后，对斡脱作为信托在蒙元时期商业活动中的作用进行了评估。     

谈高职差生教育转化的方法

高职院校中转化差生工作是一项重要工作,教师要用爱心去感化差生,用真诚去关爱差生,对他们理解尊重,与他们平等交流,就一定能促使他们向好的方向转化。     

Fibonacci数列与对角形行列式

通过对Fibonacci数列与对角形行列式的研究,得到了它们之间的密切关系。     

Results of an assessment to identify potential barriers to sustainable agriculture on American Indian reservations in the Western United States

Purpose: This paper reports the results of survey research conducted with tribal producers between 2011 and 2012 on 19 of the largest American Indian reservations in Idaho, Nevada, North Dakota, Oregon, South Dakota, and Washington. The purpose of the research was to identify potential barriers to sustainable agriculture on reservation lands. This article reports the results of this research in an effort to promote Extension professionals' understanding of these barriers, which may help to improve outreach programs on American Indian reservations. Understanding the obstacles to sustaining agriculture that American Indian tribes face may inform international agricultural outreach efforts to increase food security targeting indigenous and tribal peoples worldwide.

Design/Methodology/Approach: American Indian agricultural producers comprised the study group. Study objectives included: (1) identify agricultural and natural resource issues of greatest concern to a self-selected sample of tribal agricultural producers on reservation lands; (2) evaluate access to Extension and other US Department of Agriculture outreach and assistance programs; and (3) evaluate the quality of these programs in terms of their relativity to tribal needs.

Findings: Study results indicate that tribal agricultural producers surveyed ranked 29 of 39 agricultural and natural resource issues as a concern. Similarly, they rated access to and quality of outreach programs as fair. Further, tribal producers operating on reservation trust land rated issues more severely than did tribal producers operating on fee simple lands.

Practical Implications: Results of this research will help Extension and other outreach professionals to understand the barriers indigenous and tribal peoples face in sustaining agricultural operations, particularly tribal groups living on federally reserved trust lands, such as American Indians. An increased understanding can inform agricultural policy-makers and outreach professionals in improving programs designed to increase agricultural sustainability, improve food security, enhance economic well-being and improve quality of life of indigenous and tribal peoples worldwide.

Originality/Value: This research provides important information to agricultural policy-makers and Extension professionals striving to sustain agricultural productivity and enhance food security with indigenous and tribal peoples.