浅圆仓侧压力非线性分布分析

采用总体平衡方法给出了浅圆仓散体静态非线性分布侧压力计算公式。该公式计算简单,可用于浅圆仓的储料顶部为平顶和锥顶两种情况。将用本文公式计算的结果、用国家规范得出的结果和库仑公式的计算结果,与实仓测试结果进行对比分析,表明用本文公式计算得出的侧压力曲线与实仓测试得出的侧压力曲线吻合良好。     

大学生阅读现状分析与对策

本文分析了网络环境对大学生阅读行为的影响和部分阅读现象,提出了发挥图书馆导读教育功能,正确指导大学生阅读的方法,提高大学生的阅读素养。     

公共图书馆儿童阅读推广计划的实施策略研究——以唐山市丰南图书馆为例

公共图书馆开展儿童阅读推广工作,对提高儿童素养有着重要的作用,结合国外儿童阅读推广的一些做法,阐述了公共图书馆在儿童阅读推广中的作用,结合丰南图书馆的实践,探讨了开展儿童阅读推广的具体做法和措施。     

岱山等边浅蛤形态与重量性状参数的相关性及通径分析

为了研究等边浅蛤数量性状间的相关性及影响产量的因素组成,随机选取130只12月龄浙江岱山野生等边浅蛤的分别测量表型性状壳长(X1)、壳高(X2)、壳宽(X3)、壳顶至壳前(X4)、壳顶至壳后(X5)、韧带长(X6),重量性状活体重(Y1)、软体重(Y2)、壳重(Y3)等性状,并应用遗传相关、多元回归、通径分析等方法进行了分析.结果表明,9个数量性状间的相关系数均达到极显著水平(P＜0.001).对活体重起直接作用最大的是壳长,起直接决定作用,通过壳高的间接决定作用达40.34％.建立了利用形态性状估计重量性状的回归方程,该结果为等边浅蛤选择育种提供了理论依据,即以提高活体重为目标,主要选择壳长,同时加强对壳高的协同选择.计算相关系数,采用通径分析方法计算以活体重(Y)为依变量、其他性状为自变量的通径系数和决定系数.该研究可为等边浅蛤蛤的养殖和选择育种提供理论依据.     

高校图书馆阅读推广活动中的不足与对策思考

阅读是人类文明的重要活动之一,国家和社会都在重视阅读推广活动的展开。近年来高校图书馆都开展了多种阅读推广活动,但其实际效果尚有待加强。本文分析了高校在开展阅读推广活动中可能存在的不足,并针对这些不足对今后阅读推广活动的有效开展提出了对策。     

“浅阅读”语境下推广经典阅读的价值研究及策略

简述了全媒体时代的概念以及其背景下形成的"浅阅读"现状,从精神追求、国民需求、国家号召、民族希望四个方面论述了推广经典阅读的必要性和紧迫性,提出了推广经典阅读的新思考。     

Long‐term changes of marine subtidal benthic communities in North East Asia (Yellow and Japan seas) in a global change context: A review

1. A review of the long‐term changes and variations in benthic communities and the current status of the marine invasive species (MIS) in shallow waters of the Yellow Sea (Chinese sector) and the Sea of Japan (Russian and partly Korean sectors) is presented. This paper reflects on the progress and lessons learned, recommending actions for the future about the conservation of biodiversity.
2. In the Bohai Sea, the benthic ecosystem has been degenerating due to anthropogenic activities such as overfishing and pollution since the 1950s. The dominant position of K‐strategy species is gradually being lost and replaced by R‐strategy species. In the Yellow Sea, the macrobenthic community is different from other areas due to the Yellow Sea Cold Water Mass. Many economic species have been destroyed, and the biotic structure has changed significantly due to overfishing and climate change.
3. In the Russian sector of the Sea of Japan, the macrobenthic communities in the shallow‐water soft bottom have generally been in a stable condition for the last decades, except for some heavily polluted or disturbed areas due to dredging operations. The abundance of select large invertebrate species has changed considerably due to commercial fishing and poaching. Variations in macro? and meiobenthic communities under aquaculture conditions have occurred on a local scale during the last five decades.
4. MIS show obvious differences between China and Russia in the following aspects: introduction pathways of MIS, composition and number of non‐native species, threats and impacts of MIS to native communities and ecosystems, and economic and public health impacts.
5. Long‐term monitoring programmes should be developed to reveal future biotic changes and to separate the effects of cyclic variations of benthic communities from the impacts of pollution and eutrophication. Standardization of sampling procedures is required to compare changes/alternations in benthos across various regions worldwide.

     

烟草育苗研究进展

对烟草漂浮育苗、托盘育苗及浅水育苗等3种不同育苗方式的技术原理、研究动态、研究热点进行探讨,分析存在的问题,并提出解决对策及展望,以期为烟草育苗研究提供参考。     

基于水利工程特点的图样识读技巧分析

水利工程图的识读是每个从事水利工程设计、施工、管理工作的技术人员必备的工程素质。本文从水流方向、孔槽以及分缝的利用等5个方面分析了基于水利工程特点的图样阅读技巧。掌握好这些技巧,能够使技术人员更加快速、正确地阅读工程图样,提高工作效率。     

高校图书馆构建校园阅读文化策略研究

本文通过对大学校园阅读文化涵义的分析,探索了高校图书馆在校园阅读文化建设中的优势,探讨了高校图书馆构建校园阅读文化的策略。