竹荪抑菌防腐作用研究进展

竹荪是著名的药食兼用真菌,具有良好的抑菌防腐功效。本文主要阐述了竹荪的抑菌、防腐作用方面的研究进展,展望竹荪作为天然防腐剂的应用前景。     

“长江经济带”对“世界水谷”建设的战略需求

分析"长江经济带"水生态文明建设存在的问题及战略需求,阐述"世界水谷"模式在破解"长江经济带"水生态文明建设问题中的应用,提出发挥"政产学研"创新驱动,为解决水污染问题提供人才支撑;创新驱动主体协同,为产业转移提供资金支持和技术保障;利用市场手段解决排污权分配问题等建议。     

乘积型指数滤波器及其在多目标时延估计中的应用

指数滤波器是一类新构造出来的输出信噪比和目标时延分辨力随指数变化的滤波器,该滤波器在损失一定输出信噪比的前提下可以有效提高目标时延分辨力,从而提高目标时延估计精度,但仅采用单个指数滤波器仍存在输出信噪比和目标时延分辨力均达不到实际需求的情况。在乘积型高阶模糊函数乘积运算的启发下,在指数滤波器的基础上提出了一种新的乘积型指数滤波器,并分析了该乘积型指数滤波器的输出信噪比及目标时延分辨力等性能。仿真实验表明,所提的乘积型指数滤波器在低信噪比情况下可以更有效提高多目标时延估计精度,且算法简单易于实现,适用于背景复杂的多目标参数估计任务。     

高科技企业成长的内生机理

在高科技企业成长初期,政府的政策支持十分重要,当企业成长到一定阶段后,往往技术发挥着关键性作用。本文通过构建内生增长模型,证实在高科技企业成长初期,政府通过采取一定的优惠政策如减税可以推动高科技企业的成长;而在成长期,推进一定的增量型人力资本向集约型人力资本转化,以培育企业强大的成长“势”非常重要。人力资本及其溢出对促进高科技企业保持持续增长发挥着关键性的作用。     

基于移动互联网的微信电子商务发展研究

随着计算机技术、网络技术和通信技术的迅猛发展,电子商务已经融入现代生活的各个方面,微信平台的兴起和开发技术的成熟,促使电商业务正由传统电子商务转向移动电子商务。针对基于移动互联网的微信电子商务发展优势进行了总结,分析了当前微信移动电子商务中存在的问题并提出应对策略,展望了微信移动电子商务的发展前景。     

Obtaining collaboration benefits: the role of collaboration-specific investment and absorptive capacity in China

This study examines the role of collaboration-specific investment and absorptive capacity on the attainment of interorganizational collaboration benefits. Grounded in the extended resource-based view, and using survey data from Chinese executives, we study the driver for, and test the impacts of, collaboration-specific investment and organizational learning on collaboration performance. Our findings indicate that resource similarity between the collaborative partners affects the level of collaboration-specific investment and learning, and demonstrate an approach that firms can use to obtain both abnormal common and private benefits from participation in an interorganizational collaboration. Specifically, the findings suggest that collaboration-specific investment has a direct effect on the enhancement of absorptive capacity and attainment of common and private collaboration benefits. Furthermore, due to the direct effect of absorptive capacity on attainment of collaboration benefits, commitment of collaboration-specific investment has an indirect effect on the attainment of common and private collaboration benefits. This study is the first to apply both the competence-capability framework and extended resource-based view to study interorganizational collaboration. In fact, this study aims to determine mechanisms for a collaboration-participating firm to obtain more benefit, whether common or private. Our findings provide support for the importance of learning capability as a factor in the acquisition of collaboration benefits.     

Political hazards and entry modes of Chinese investments in Africa

Africa has achieved the fastest growth rate of inward foreign direct investment (FDI) recently. Yet heightened political hazards present substantial challenges to foreign firms in Africa. This study examines the entry strategies that firms may take to mitigate such hazards by exploring the relationship between political hazards and entry mode choices in Africa. We further consider how an investing firm’s host country experience and foreign aid provided by its home country government to host countries in Africa can influence this relationship. In a sample of listed Chinese firms’ investments in Africa from 2000 to 2014, we find that Chinese firms tend to use the joint venture mode when political hazards are high in an African country. This relationship is weakened when they accumulate host country experience and when the Chinese government’s foreign aid to an African country increases. Our findings point to firm-level strategies to mitigate political hazards as well as instruments available to home country governments to help their multinational firms operating in host countries characterized by unstable political environments.     

建立科学的城市可持续发展指标体系

建立一种能综合地、完整地体现城市可持续发展的指标体系,是一项极具挑战意义的工作.本文在对国内外现有的可持续发展指标体系进行梳理的基础上,探讨了构建城市可持续发展指标体系的基本原则,提出了新的城市可持续发展评价指标体系.     

构建与普及理性低碳生活方式——人类文明社会演进的应然逻辑

人类的生活方式是与其社会的文明状态相适应的。原始文明社会中人类的生活方式是“朴素无碳”的,农业文明社会中人类的生活方式是“适应性低碳”的,工业文明社会中人类的生活方式是“发展性高碳”的,而生态文明社会中人类的生活方式应是“理性低碳”的。理性低碳生活方式是人类可持续发展的自我选择,是要在提高生活水平和质量的进程中实现低碳化,是生活方式的革命性发展。构建和普及理性低碳生活方式,需要树立和强化低碳生活理念,实现衣食住行等多方面的低碳化改造;需要全人类的共同努力,各个国家和地区应根据实际情况选择和普及各具特色的理性低碳生活方式;需要各生活主体的协同配合,政府、企业与居民等要全方位地、积极地、广泛地践行理性低碳生活方式。     

气候变化与旅游研究综述

全球气候变化是当今自然地理学研究的重要课题之一,同时因直接或间接地对旅游业发展产生影响而受到广泛关注。通过对全球气候变化与旅游相关的现有研究梳理发现:相关研究成果丰富,理论框架基本成熟,研究时空尺度广泛,定性与定量方法兼顾,重视以低碳旅游为热点的策略研究。在后续研究中需要进一步考虑旅游市场需求影响;在气候变化视角上重视积极影响研究;气候指数和模型的适用性和客观性仍有待深入讨论;小气候与环境的微观变化对景区或某些景观的影响讨论不足;需要重视综合指标和多维体系的构建。