浅析森林的生态效益及其保护   总被引：1，自引：0，他引：1  

姚方威 《商丘职业技术学院学报》2004,3(5):22-23

森林资源是一种重要的自然资源，从它的生态效益考虑，具有维持生态平衡，调节自然环境，保护人类的生存方面的巨大功能。人类毁林开荒，乱砍滥伐现象，给全球带来了水土流失、土地荒漠化、气候恶化等一系列生态灾难，并招致水、旱多方面自然灾害的发生。只有保护森林、大力绿化造林、提高森林覆盖率．才能成为一个风调雨顺，美丽富饶的国家或地区。  相似文献   

Rolle中值定理的一个新证明   总被引：1，自引：0，他引：1  

李万军 《宜宾学院学报》2004,4(3):140-141

本文给出了Rolle中值定理的一种新的证明方法  相似文献   

The tension between curriculum coverage and quality learning: The experiences of South African teachers     

《International Journal of Educational Development》2021

In South Africa, there is increasing state monitoring of curriculum coverage. This is a response both to classroom research which shows that teachers do not always cover the official curriculum in the specified year and to learners’ poor achievement in international tests. In the province of KwaZulu-Natal from 2013 to 2016, the provincial department of education embarked on a systemic reform programme called Jika iMfundo in 1200 schools, which is focused on improving curriculum management and coverage. We interviewed 29 Heads of Department (who are also teachers) in fifteen schools who had participated in the Jika iMfundo programme for these three years, asking them about their experiences. The findings show that teachers experience tension between the fast pace required by the curriculum trackers and slow pace of learners and they believe that increasing pacing to cover the curriculum hampers the quality of the learning. Teachers also said that the curriculum coverage trackers do not account for different school contexts. We argue that while the programme has provided clear curriculum guidance to teachers who need it, it has not sufficiently acknowledged the huge variation in learners’ competence. Nor has it yet enabled teachers to develop the content knowledge and the pedagogical content knowledge necessary to teach learners who are not at the same grade level (although they are in the same classroom). Curriculum coverage is a necessary, but not sufficient intervention, unless there is also a focus on pedagogy and teaching at the right level. We recommend an intervention that enables teachers to identify individual learner’s existing learning gaps, and equips them to teach at the right level in order to provide learners with opportunities to develop foundational knowledge and skills to succeed in further education, rather than one whose primary focus is only curriculum coverage.  相似文献   

Portrayals of Child Abuse Scandals in the Media in Australia and England: Impacts on Practice,Policy, and Systems: Most media coverage distorts the public understandings of the nature of child maltreatment     

Bob Lonne 《Child abuse & neglect》2014

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改革思想政治理论课考核体系的探索与实践     

陈玲 《沧州师专学报》2012,(2):130-132

高校思想政治理论课传统考核体系不能全面、准确地考核学生的知与行,难以实现教学目标。改革传统考核体系,必须坚持理论知识考核与能力考核并重的原则,坚持期末考核与课堂教学考核相结合的原则,坚持知与行相结合考核的原则。探索将学生日常行为和课堂表现纳入考核评价体系之中。  相似文献   

The Public Librarian and Library Education     

《Public Library Quarterly》2013,32(3):5-12

No abstract available for this article.  相似文献   

Social Gerontology—Integrative and Territorial Aspects: A Citation Analysis of Subject Scatter and Database Coverage     

Elaine M. Lasda Bergman 《Behavioral & Social Sciences Librarian》2013,32(3):154-175

To determine the mix of resources used in social gerontology research, a citation analysis was conducted. A representative sample of citations was selected from three prominent gerontology journals and information was added to determine subject scatter and database coverage for the cited materials. Results indicate that a significant portion of gerontology research, even from a social science perspective, relies roughly equally on medical resources as it does social science resources. Furthermore, there is a small but defined core of literature constituting scholarly “territory” unique to gerontology. Analysis of database indexing indicated that broad, interdisciplinary databases provide more comprehensive coverage of the cited materials than do subject-specific databases.  相似文献   

影响我国养老保险覆盖率的因素的实证分析     

段程遥 《湖南城市学院学报》2013,(6):69-72

我国已经基本建立起社会统筹的养老保险体制,但各个省市的覆盖率差别较大。通过实证分析,建立多元线性回归模型,分析近几年面板数据,结果显示社会养老保险覆盖率与教育水平显著正相关,而与家庭规模和人均可支配收入显著负相关。因此我国应扩大养老保险的覆盖面,进行养老保险征缴费率的改革,加大宣传力度,建立公平体制,保障个人账户的储蓄和收益,以提高养老保险的覆盖率。  相似文献   

Power-efficient topologies for wireless sensor networks with fixed communication range     

金彦亮  缪慧俊  王晖  葛泉  熊勇 《上海大学学报(英文版)》2010,14(1):39-44

The expectations for sensor networks are growing. The performance of wireless sensor networks （WSNs） is greatly influenced by their network topology. In this paper, we consider four patterned topologies that best support connectivity among these deployed sensor nodes in two-tiered WSNs. The theoretical and simulation results show that the triangle-based topology has smaller cell number, shorter maximum hop length, less total energy consumption, and better performance than other topologies. The analysis carried out in this paper could provide the guidelines for network deployment and protocol design in the future applications.  相似文献   

试析电视新闻的深度报道     

季虎 《泰州职业技术学院学报》2006,6(5):51-53,63

电视新闻作为一种叙事载体,通过复制、刻画、摹写现实等手段,以表现其对“社会真实”的忠实反映。而深度报道作为电视新闻的一种报道形式,由于有着形式上的犀利深刻和内容上的丰富深广。  相似文献