选取国内沪深A股主板市场于2016—2019年连续完整披露参与精准扶贫信息的360家上市公司为研究样本,证实检验企业参与精准扶贫影响企业绩效过程中的门槛效应.结果表明:企业规模的门槛估计值为1245.69亿元,规模在此门槛值以下的企业参与精准扶贫给财务绩效带来的正向影响程度不如门槛值以上的企业;扶贫规模的门槛估计值分别为0.2965亿元及2.3419亿元,门槛值以下企业参与精准扶贫给企业带来的正向效应十分明显,每超过一个门槛值正向效应就会急剧减小.

In order to measure the value of high-speed railway in the development of Beijing-Tianjin-Hebei urban agglomeration and provide empirical support for the rationality of “eight horizontal and eight vertical” planning, based on the impact mechanism of high-speed railway on economic growth, this paper uses the data of 13 prefecture level cities in Beijing-Tianjin-Hebei urban agglomeration from 2009 to 2017 to quantitatively study the economy of Beijing-Tianjin-Hebei urban agglomeration triggered by high-speed railway Growth effect. The empirical results show that the overall effect of high-speed railway on economic growth of Beijing- Tianjin-Hebei urban agglomeration is 0.545 in the past two years, which is a large positive effect. The highspeed railway can not only directly stimulate the economic growth of Beijing-Tianjin-Hebei urban agglomeration by expanding the scale of capital investment, but also indirectly promote the economic growth of Beijing Tianjin Hebei urban agglomeration by promoting the development of system, technology, labor force and industrial structure, which proves the value of high-speed railway. Finally, according to the empirical results, it provides reasonable feasible suggestions to the relevant government departments.

为规避数字信息时代下,沉浸式体验普遍存在的技术应用商业化、声光电设计泛滥化、形式互动打卡化等"泛娱乐化"现象,真正实现沉浸式体验在叙事性、体验性、互动性和技术性方面的融合统一.基于内容故事性、情境通感性、受众主体性及技术匹配性等维度的建构原则,以《圆明园四十景图咏》之一的"坐石临流"为研究对象,通过运用文献分析法、田野调查法和案例研究法,尝试呈现坐石临流景区的沉浸式体验场景,以期能够促进圆明园文化遗产的活态发展.

在信息高速传播的当代社会,传播媒介不断发展且日益完善,资源的保存方式与信息的数字化传播方式也层出不穷,种类也趋于多样.信息的表达也渐渐从二维转向了三维;信息的传播与流动经历了从静态的点性、线性、范围性到动态的面性、覆盖性的过渡;再从动态的覆盖性到现在信息实时性传播的局面.而信息的实时传播与超大范围的覆盖性恰恰就是我国信息化建设与社会资源环境可持续利用的重要前提.