, 2003 森林生态系统中,初级生产者和分解者之间的养分关系,是一种既互利又竞争的复杂关系。通过构建初级生产者-分解者系统的养分流动模型,分析分解者增长受碳限制或受养分限制的判断标准。在假定整个系统封闭的前提下,讨论初级生产者与分解者实现共存并保持长久稳定的条件:一是分解者必须受碳限制,这要求分解者较之初级生产者对养分吸收具有更强的竞争力;二是矿化系数与碎屑化系数之比(a41/a23)要足够大于在初级生产者中的碳/养分与在分解者中的碳/养分之比(α/β)。这表明,从化学计量论的角度来看,生态系统的持续和稳定,对碳 ...
潘开文, 刘增文, 李雅素
core
[Impact of optimizing the quality control system on newborn screening outcomes for congenital hypothyroidism]. [PDF]
Zhongguo Dang Dai Er Ke Za ZhiWang J +6 more
europepmc +1 more source
, 2007 基于1957~2003年塔里木河流域源流区长期监测资料,分析塔里木河流域源流区的主要河流年径流量和相应气温、降水变化的特点,探讨流域内气候变化与水资源量变化的关系。利用非参数检验的方法,分析温度、降水变化与径流量变化的关联性和一致性。结果显示:在塔里木河流域源流区,温度在0.05水平上呈现单调递增的趋势,降水则表现为不显著增加的走势,而径流量基本均出现了递增现象;从参数检验和非参数分析的结果看 ...
叶茂, 徐海量, 宋郁东
core
[Preparation of mesoporous covalent organic framework core-shell stationary phase and its application in the analysis of astragaloside Ⅳ content in <i>Astragalus</i>]. [PDF]
Se PuZhao XY +7 more
europepmc +1 more source
, 2017 本发明提供了一种基于Openflow协议的实时数据分发系统和方法。本发明提出的通信框架结合了DDS与SDN网络来支持高效动态分布式应用，该系统主要包括底层网络设备、DDS接口API、控制器、DDS代理、北向接口和应用服务。其中DDS代理、DDS接口API和底层网络设备中的路由代理是DDS系统的组件，北向接口、控制器、南向接口、OF交换机和Openflow协议是软件定义网络的组件。SDN为网络带来了灵活性，并且提供了按需动态通信网络服务质量的设置 ...
李栋 +5 more
core
[Revolution teaching practice in sample pretreatment supported by large-scale instrument： a case study of magnetic covalent organic framework enriching organic ultraviolet filters in seawater]. [PDF]
Se PuLi S +5 more
europepmc +1 more source
[Gait event-driven dynamic changes in brain-muscle networks and neuromuscular coordination mechanisms]. [PDF]
Sheng Wu Yi Xue Gong Cheng Xue Za ZhiLiu X, Guo A, Liang T, Liu X, Qin L.
europepmc +1 more source
[Determination of <i>S-</i>enantiomer in linagliptin by supercritical fluid chromatography-ultraviolet detection]. [PDF]
Se PuLi WJ, Jin W, Liu Q, Wang J, LE J.
europepmc +1 more source
[Expert consensus on artificial intelligence-assisted monitoring and management of neonatal jaundice in primary medical institutions (2026)]. [PDF]
Zhongguo Dang Dai Er Ke Za ZhiSubspecialty Group of Neonatology +2 more
europepmc +1 more source
[Impact of HIV-1 genotypes and population mobility on HIV-1 transmission in Guangzhou: a molecular transmission network analysis]. [PDF]
Nan Fang Yi Ke Da Xue Xue BaoHuang W +6 more
europepmc +1 more source