Results 11 to 20 of about 16,292 (168)
Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract Most terrestrial plant species form symbioses with arbuscular mycorrhizal fungi (AMF). However, the below‐ground carbon (C) allocation of plants and the nutritional and growth benefits provided by AMF within this symbiosis vary greatly across species and environments ...
Hengjun Zhao +3 more
wiley +1 more source
Journal of Animal Ecology, EarlyView.This population‐comparative study reveals that male and female parents respond differently to social and ecological conditions. This sex‐specific responsive strategy is related to the incongruent parental care systems across populations in Chinese penduline tits.
Jia Zheng +5 more
wiley +1 more source
Synthesis and Modification of LiNixCoyMnzO2 Cathode Material for Li-ion Batteries [PDF]
, 2015 LiNixCoyMnzO2正极材料因兼具镍酸锂、钴酸锂和锰酸锂的优点，具有容量较高、热稳定好、价格较低和环境污染小等优点，被认为是最有可能取代钴酸锂的新型正极材料之一。如何让LiNixCoyMnzO2正极材料在拥有更高能量密度的同时拥有更好的电化学性能和热稳定性是目前的研究热点之一。 本论文选取低Co含量的LiNi1/3Co1/3Mn1/3O2和LiNi0.5Co0.2Mn0.3O2为主要研究对象。采用共沉淀结合高温烧结法，优化一系列实验条件合成类球形LiNi1/3Co1/3Mn1/3O2正极材料 ...
蔡济钧
core
Design and Implementation of National Tax Source Monitoring and Analysis System in HaiXi County of QingHai [PDF]
, 2016 近几年来，海西州国税局系统信息化建设按照国家税务总局信息化建设一体化的思路，在全州上下不断的努力下，取得了突破性进展，包括行政、征管、稽查、执法乃至日常的办公都已经纳入了税收电子化的应用范畴，并大多实现了网络化、集中化的管理。在此基础上，为进一步做好海西州国税局的税源监控和分析，依托信息化手段提高征管质量，设计、开发了税源监控和分析系统。 本课题首先对税务局的业务现状进行了调查研究，了解到由于在税源监控和分析过程中存在的种种问题迫切需要税源监控分析系统的构建 ...
赵媛
core
Methods in Ecology and Evolution, EarlyView.Abstract Molecular identification of insect food webs can accurately reveal complex trophic interactions and serve as a foundation for understanding ecosystem functioning and advancing biodiversity conservation. This process typically involves DNA library construction, high‐throughput sequencing and subsequent steps, including data assembly, annotation,
Xiao‐man Zhang +9 more
wiley +1 more source
A study of the influence of film-formation additive and surface coating on the performance of Lithium Nickel Manganese Cathode Material [PDF]
, 2015 摘要 随着能源和环境问题的日益凸显，锂离子电池作为新的储能方式越来越广泛地应用在电动汽车(EV)，混合动力电动汽车(HEV)和插入式混合动力电动汽车(PHEV)等领域。为了获得更高的能量密度和功率密度，开发高电压正极材料如5V尖晶石LiNi0.5Mn1.5O4（LNMO）和与之相关的基础研究成为锂离子电池研究的重要方向之一。然而，造成LNMO容量衰减的因素主要有两个方面：LNMO的工作电压超出了电解液的电化学窗口（Abstract With the energy and environmental ...
姚胜之
core
Conservation Biology, EarlyView.Abstract Constructed value of information (CVoI) is an expert elicitation decision‐analytic tool used to prioritize sources of uncertainty based on their potential to improve decision outcomes if resolved. Despite increased application of CVoI, the robustness of CVoI prioritization of sources of uncertainty relative to differences in expert elicitation
Kristin P. Davis +7 more
wiley +1 more source
Gaoya dianqi, 2020 分布式储能是解决新能源并网问题的有效手段,分布式储能的选址定容将影响储能系统效率、系统网损及投资成本等,因此有必要对分布式储能进行选址定容规划。文中提出一种分布式储能选址定容规划,具体策略是以电压稳定裕度为指标,选出部分系统电压稳定性弱的节点,进行预选址;然后在考虑储能设备充放电状态的基础上,针对负荷日特性曲线,设定储能系统的调度策略;并考虑负荷、风电、光伏时序特性,以有功网损为目标函数,利用粒子群算法寻优,优化储能充放电功率;最终确定分布式储能设备的位置及容量 ...
郜宁 +6 more
doaj
Flame Retardant Modification of Epoxy Using Phosphorus-containing POSS-based Polymers [PDF]
, 2015 环氧树脂因其具有良好的粘结性、化学稳定性、低收缩、优异的机械性能、易加工成型和成本低廉等优点，而广泛应用于粘结剂、涂料及电子封装等领域，但是由于环氧树脂存在内应力大、质脆，耐热性及阻燃性能不足而使得其应用受到限制。传统含卤素尤其是含溴阻燃剂虽被证明有很好的阻燃效果并得到广泛应用，但研究发现其在燃烧时会生成有毒物质，使得含卤阻燃剂的使用受到限制。建立新型无卤、无毒的环氧阻燃体系已成为科研工作者关注的研究热点之一。 本文以DOPO（9,10-二氢-9-氧杂-10-磷杂菲-10-氧化物 ...
陈国荣
core
Effect of ZnF2 Coating on Performance of LiNi0.5Mn1.5O4 Cathode Material for Lithium-ion Batteries [PDF]
, 2017 采用溶胶-凝胶法制备了LiNi0.5Mn1.5O4正极材料，并利用Zn F2对其表面进行包覆改性。XRD、SEM和TEM测试表明，包覆处理不影响材料的晶体结构，2%(质量分数，以LiNi0.5Mn1.5O4质量计，下同)的Zn F2在LiNi0.5Mn1.5O4表面形成了约7 nm厚均匀包覆层。对未包覆的LiNi0.5Mn1.5O4和1%、2%、3%的Zn F2包覆后的LiNi0.5Mn1.5O4的电化学性能进行了考察，发现Zn F2包覆能够减弱电解液与LiNi0.5Mn1.5O4正极材料之间的相互作用，
张灵志 +4 more
core +1 more source