国有林区缓解贫困与生态保护共生协调度及应用研究

[目的]缓解贫困与生态保护的协调发展关系到区域的可持续发展问题,对国有林区缓解贫困与保护森林生态系统安全两者关系的分析研究是生态文明建设新阶段值得高度关注的课题。正确处理生态保护与林区经济发展互促互进具有重要意义,把国有林区缓解贫困与森林生态保护看作两个相互影响相互作用的生物体,用以揭示国有林区缓解贫困与生态保护之间的协调共生关系,以期为区域可持续发展提供理论基础和现实依据。[方法]以黑龙江省国有森工林区40个林业局为研究对象,选取2016年国有森工林区贫困与森林生态综合发展水平的14个指标数据,并运用主客观赋权法确定各指标权重,构建两子系统的共生协调度模型,探究国有森工林区各林业局贫困与生态的共生协调模式的空间布局和差异。[结果]黑龙江省国有森工林区共生协调模式呈现多样化趋势,经历互利共生、寄生协调、寄生冲突和互害竞争等关系,但寄生模式是黑龙江省国有林区贫困与生态的主要模式。[结论]黑龙江省森工国有林区要想实现缓解贫困与生态保护的共生协调,一方面需要加大对森林资源的保护的投入及抚育力度,另一方面森工企业要转变生产方式,优化林业产业结构,提高对林木资源的利用效率。     

Foreign Ownership Restriction and Momentum – Evidence from Emerging Markets

This study investigates the impact of foreign investors on stock price efficiency and return predictability in emerging markets. It finds that stocks fully investible for foreign investors exhibit stronger price momentum than non‐investible stocks. The difference in momentum effects between stocks with different levels of investibility cannot be fully explained by world market risk, size, turnover, or country‐specific factors. Further tests show that fully investible stocks have no post‐earnings‐announcement drift (PEAD), and their short‐term momentum reverses over a longer horizon. These results show that the stronger momentum of highly investible stocks does not appear to be driven by foreign investors' underreaction to firm‐specific information, but is more likely to be generated by their positive feedback trading.     

消费者生活方式与物质主义价值观的相关性研究

本文主要研究生活方式与物质主义价值观的相关关系。基于495位消费者的问卷调查数据，借助因子分析方法，探索出11个生活方式因子，利用这11个因子进行聚类分析，将调查样本划分为5个子市场。随后，用方差分析法分析得出结果：5个子市场在物质主义价值观上有显著性差异，并用最小显著差异法进行两两比较，确认了具有不同生活方式的消费者在物质主义价值观上的差别。     

LearnSmart,adaptive teaching,and student learning effectiveness: An empirical investigation

Facing the growing number of digital natives entering the classroom, business professors look for innovative ways to enhance the student learning experience. The authors focus on the online interactive learning tool LearnSmart (McGraw-Hill, New York, NY), and examine its impact on student learning effectiveness by testing the direct and indirect relationships among perceived competence, perceived challenge, instructors, perceived value, and satisfaction with LearnSmart. Constructionism served as the theoretical foundation for this study. About 215 students at a public university in the United States took the survey and 197 valid responses were received. Regression analysis results showed that the use of LearnSmart improved students' perceived competency, thus increasing their perceived value of using LearnSmart, as well as their satisfaction with LearnSmart. Perceived value was also found to mediate the impact of perceived competency on satisfaction with LearnSmart, and the instructor played a significant role in facilitating and improving student learning. Perceived challenge impacted student's perceived value of using LearnSmart, but it did not influence satisfaction with LearnSmart.     

Revisiting Border Effect: Evidence from Taobao.com in China

Inherent home bias and trade barriers (particularly local protectionism in China), which are difficult to separate, are two main explanations of border effect. We attempt to solve this problem by analyzing online trade. Different from offline trade, inherent home bias is the only cause of online border effect because local governments are usually unable to restrict online trade. Thus, the difference between the border effect in online and offline trade can be reasonably interpreted as the existence of government protectionism in the offline market. We find a statistically significant difference between online and offline border effects in China, which can be interpreted as strong evidence that policy barriers remain significant and hinder interregional trade.     

我国信息产业与经济增长的协整分析

本文运用协整理论的EG两步法、格兰杰因果检验,以及回归估计方法对我国信息产业与经济增长关系进行了深入分析。研究发现我国信息产业与经济增长有长期稳定的均衡关系,信息产业对我国经济增长有显著的促进作用,而经济增长对拉动信息产业的作用在中期(2～4年)内有一定效果,在短期(1年)和长期(5年及以上)内则并不显著,并针对这些结论提出相关政策和发展建议。     

一种有限元并行共轭梯度算法在计算力学中的应用

本文以POSSION方程为研究背景,实现了有限元的并行计算.通过对定解区域进行特殊的划分,达到了不需合成结构刚度矩阵的目的,并在此基础上应用线性方程组的共轭梯度法,使计算的并行性得到了很好的拓展,实现了从网格划分、刚度矩阵的合成到方程求解的并行执行.并将该算法应用在计算力学中.程序在西北工业大学高性能计算中心的HPRX2600上进行了数值实验,结果表明,该方法具有良好的加速比.     

浅谈会计电算化与应用

二十一世纪中国经济的全面崛起,将使中国完全可能成为新兴的世界强国,"中国崛起"已经无可争议地成为了当今全球的主题.很多大企业甚至不那么大的企业都真正走出去,在世界各地做自己的生意,在世界各地都有自己的管理者、自己的股东、供应商和客户,他们真正成为了全球化的企业.各种现代化手段广泛应用于企业管理和经营中,不但节省了资源,还达到了事半功倍的效果.本丈通过对企业会计电算化的介绍,分析和阐述了会计电算化的特点作用以及一些现代化的管理软件在会计电算化中的应用.     

1GHz以上微波暗室电场强度标准及误差分析

本文阐述了利用系列角锥喇叭建立１ＧＨｚ以上微波暗室标准电场强度的原理和方法。导出了角锥喇叭近场增益的简化公式。简述了２０８０天线测试系统及三天线法测量技术，且对测量误差进行了分析。理论和实验结果表明，建立标准电场强度的误差≤０．５ｄＢ。     

旅游资源可持续利用研究框架透析

旅游资源的开发和利用伴随旅游业的发展已迈入成熟调整时期,由市场调节和宏观调控共同作用和影响下的旅游资源的开发现状和利用趋势呈现出小幅震荡、利好消弭、补仓不济的特点,而学术界针对当前情势下的相关研究则因市场秩序的自我修正出现了短期混沌,故提出了旅游资源可持续利用研究的系统框架,通过"概念体系—理论体系—认识体系—实践体系"这一阶梯型研究脉络,勾勒出较为清晰的研究思路和高效的研究方法,以此为后期研究提供依据。