清代黔东南地区森林资源变化及其社会区域响应的初步研究

17世纪-19世纪,中国西南山区普遍经历了生态环境的变迁,人地关系紧张,山地开发加剧,大量森林植被遭到损耗,生态环境出现危机。但是黔东南地区在同期却没有出现大规模的森林植被破坏,反而实现了森林资源的可持续利用。本文采用历史文献分析方法,对明代至民国初年黔东南的森林资源变迁及其社会区域响应机制进行研究得出,这种区域差异的形成受到自然地理条件和人类活动等多方面因素的影响,但是合理的社会响应机制是黔东南能够在清代至民国初期森林资源可持续利用与发展有力的驱动因素。其中少数民族的宗教崇拜、禁忌习俗,以及传统的习惯法,是黔东南山地民族原始而独特的生态观的外化表现,对森林资源的保育、树种遗传资源的保存有直接推动作用;林粮套种的农林生产结构,大大规避了单纯农垦生产模式潜在的自然灾害风险,保证了地力的充分使用,解决了佃农的口粮问题,在较大程度上实现了林区生态系统的良性循环;乡规民约和林事纠纷调解机制,构成一个强有力的林业法制管理体系,对森林资源日常管理和利用秩序进行严格规范,确保了民间法规法律效力和有序执行。鉴于历史时期山地民族生态智慧对于保护和改善生态环境的积极作用,如何充分认识、理解,并将民族社区精华的传统生态智慧有效地运用于现代资源管理中,是一个值得研究的课题。     

风险投资与我国高技术产业发展刍议

本文简要地介绍了美国风险投资情况,分析了９０年代以来风险投资新的投资领域。作者旨在对我国高技术风险投资的现状进行论述,并针对存在的不足之处提出几点建议     

University social responsibility in the context of economic displacement from the proposed upgrading of a higher education institution: The case of the University of Groningen Yantai campus

Around the world, especially in rapidly developing countries, many higher education institutions of various forms are being established. In China, many new universities have been created, including by upgrading existing tertiary education institutions. This process creates economic displacement, with livelihood consequences and social impacts on existing employees and local communities. Using the proposed (but now cancelled) University of Groningen campus in Yantai, China, as a case study, we consider the social impacts that were experienced, or were likely to be experienced, by the employees of the pre-existing institution. Existing employees experienced many negative impacts from economic displacement. They were not satisfied with the compensation offered, their views and interests were not adequately considered, and many were afraid to express their concerns. The institutions involved in the project failed to fulfil their corporate social responsibility (CSR) and environmental, social and governance (ESG) obligations to ensure no harm.     

济宁市招商引资中存在的问题及对策研究

招商引资是扩大投资、加快区域经济发展最快捷、最有效的选择。搞好济宁市的比较优势分析,找准济宁市招商引资中存在问题,扬长避短,制定科学的招商策略,将推动济宁市扩大招商引资工作的开展。     

科技期刊编排规范的编制及实施体会——以《环境工程学报》为例

为进一步有效地执行国家标准和规定,提高科技期刊整体质量和工作效率,扩大期刊的影响力,编制并实施科技期刊编排规范(企业标准)是有效手段之一.以《环境工程学报》为例,阐明科技期刊编排规范的编制原则;简明列出期刊编排规范的编制步骤;详细介绍期刊编排规范的基本内容和主要内容.结果表明:期刊编排规范的编制有利于编辑、作者更好地理解和实施国家标准和规范;利于期刊稿件体例格式的统一,提升期刊品牌形象;利于提高期刊编校质量和工作效率;利于增强编辑部团队的凝聚力并提高编辑部的整体水平和实力.科技期刊编排规范的编制和实施为提高期刊整体水平打下了坚实的基础.     

硫酸锰生产过程对环境的影响及污染治理

通过对硫酸锰生产工艺过程中影响环境质量的水、烟气、固体废弃物、噪声、地表水和环境风险等项目进行了系统的监测与评价,在监测结果基础上,拟定出一套完整的治理方案,并对该方案治理效果进行了综合评价。结果表明,我们的治理方案能够满足三废排放标准,是一种简便、经济、快速处理硫酸锰生产工艺过程污染的好办法。     

图书馆空间的审美化与阅读环境设计

人类在构建知识社会的同时,也需要构建审美社会。图书馆在认知文化与审美文化之间具有纽带和桥梁作用。图书馆能够推动读者读书生活的审美化,促进知识社会与审美社会的融合,构建真正和谐美好的社会。     

谈制约民间投资的"隐形壁垒"

民间投资在市场准入、投融资体制、行业壁垒、税收等方面受到限制,使得投资热情和投资效果大打折扣,阻碍了中国经济的快速发展.     

论国际环境法中的非政府组织

随着经济的发展,人类环境问题已越来越成为全球共同关注的一个焦点.ENGO积极地活跃在环境保护领域,并给国际环境法的发展带来了重大的影响.而ENGO的成长,也离不开国际社会的关注.     

Switching position and range-domain carrier-smoothing-code filtering for GNSS positioning in harsh environments with intermittent satellite deficiencies

Carrier-smoothing-code filtering (CSCF) is widely used in GNSS signal processing to combine code pseudoranges and carrier phases. Position-domain (PD) CSCF is generally more accurate and less sensitive to visible satellite changes than range-domain (RD) CSCF. However, PD-CSCF necessitates at least four visible satellites. Intermittent satellite deficiency with less than four visible satellites is not uncommon in harsh environments like urban canyons. At such deficiency epochs, the PD-CSCF convergence has to break off. This study aims to bridge intermittent deficiency epochs in PD-CSCF without introducing any external information. The proposed solution is called switching RD and PD CSCF in which PD filter is replaced by RD filter at deficiency epochs. Besides detailing the seamless switching algorithms from PD/RD to RD/PD filters, a global RD filter, different from the conventional one, is developed to preserve the correlations among smoothed pseudoranges corresponding to different satellites. Compared to the conventional PD and RD CSCF algorithms, smoother results can be expected from the proposed switching filter, especially after the intermittent deficiency epochs. Experiments are conducted using real BDS signals. Cases with different kinds of deficiency are considered. Superiority of the proposed method is clearly observed from the results.