A link between increased temperature and avian body condition in a logged tropical forest
Conservation Biology, EarlyView.Abstract The combined effects of anthropogenic disturbances, such as logging and climate change, remain poorly understood; yet, they are the main threats to tropical biodiversity. Most tropical African countries lack long‐term climate data, so climate impacts on biodiversity cannot be assessed.
Moreen Uwimbabazi +7 more
wiley +1 more source
Design and Implementation of State Estimation and Management for a Power Enterprise [PDF]
, 2015 电力系统运行的安全性和可靠性直接关系到国家经济的发展，同时也是维系国家安全和社会稳定的重要因素，因此电力一直是国家的支柱能源和经济命脉。目前电力系统运行的各种约束条件日益强化，其运行方式和网架结构也越来越复杂，这是因为电力行业向大系统、超高压、远距离、大容量方向发展。为了给调度工作人员提供相关技术支持，通常采用电网能量管理系统(EMS)来集成各种数据。EMS能够为电网的安全运行奠定良好的基础。作为EMS的不可或缺的重要部分之一，状态估计能够为系统提供可靠完整的信息和系统状态数据 ...
莫明江.阿不力克木
core
Health status assessment for ship diesel engines based on LSTM prediction and cloud barycenter model [PDF]
ObjectiveIn response to the development needs of smart engine rooms on ships, this paper proposes an assessment method for the health status of ship diesel engines.
Chao LIU +3 more
core +1 more source
Gaoya dianqi, 2020 高压开关柜作为配电网络中应用最广泛、使用数量最多的配电设备之一,为保证高压开关柜稳定运行及电网安全,需要对其状态进行准确评估。文中提出了一种综合赋权与加权秩和比（WRSR）相结合的新的开关柜状态评估方法。首先根据高压开关柜的绝缘状态、电气状态、机械状态和历史记录等信息,建立状态评估体系,运用层次分析法和熵权法相结合分别计算指标主客观权重并实现综合赋权;其次建立基于加权秩和比（WRSR）的开关柜状态评估模型,该模型构建简便,且具有强大的信息统计分析功能,可以实现状态分类及定量评估 ...
吴晗 +5 more
doaj
Impact Resistance Evaluation of Pier Structures Subject to Corrosion in Marine Environments [PDF]
, 2016 考虑大量桥梁未设置安全岛或其它类型的防撞设施，桥墩客观存在着船撞的风险，并可能因为船撞产生局部破坏甚至整体倒塌。与此同时，桥梁还不可避免地受到腐蚀引起的性能退化，特别是海洋环境下钢筋混凝土桥梁出现的腐蚀劣化问题尤为突出。目前对于旧桥的抗冲击性能评估，鲜有学者考虑结构腐蚀劣化带来的影响，这可能造成评价结果偏于不安全。因此，有必要细致考虑腐蚀因素对桥墩柱性能的影响，在此基础上，进一步分析墩柱腐蚀对其抗冲击性能的影响。 本文首先根据结构腐蚀劣化的机理及其对桥墩柱结构的危害，确定结构腐蚀退化因素 ...
王永辉
core
How much biotic nativeness matters across human demographic groups
Conservation Biology, EarlyView.Abstract Many central concepts of conservation biology—such as nativeness—are structured by ecological and social factors. However, the social consequences of using these concepts to make conservation decisions remain inadequately understood. Some researchers argue that nativeness, rather than acting as an objective proxy for important ecological ...
Harold N. Eyster, Rachelle K. Gould
wiley +1 more source
Differences in characteristics between naturalized threatened plants and other threatened plants
Conservation Biology, EarlyView.Abstract Many non‐native plant species introduced by humans have become naturalized. At the same time many species are threatened in their native range. However, the number of plant species threatened in their native range that are naturalized elsewhere remains unknown.
Weihan Zhao +10 more
wiley +1 more source
Research on Condition-based Maintenance Technology for Power Transformer [PDF]
, 2010 变压器是电力系统中最重要的设备之一，一旦故障停电将对系统的供电可靠性造成极大的影响。近年来，变压器状态检修方式越来越受到我国电力企业的欢迎，深入开展变压器状态评估，制定合适的变压器检修策略，推行变压器状态检修，对节省运营成本和确保安全供电具有深远的意义。 论文主要介绍了变压器状态检修的主要内容，分析变压器常见的故障类型和成因，阐述了油中溶解气体的产生机理。分析并确定变压器几种油中溶解气体含量作为状态评估的状态量，对变压器状态评估的研究方法进行探讨，分析了其相应特点和功能 ...
刘继宗
core
Research on Human Health States Assessment Model Based on AHP-EWM in Multiple Scenarios [PDF]
To solve the problem of insufficient personalized monitoring in human health assessment methods and meet the demand for fine-grained health status assessment in different scenarios, a multi-scenario-based human health status assessment method is needed ...
Jiuyuan HUO, Hongyang WANG, Tao JU, Jun HU
core +1 more source
Data-driven Health Status Prediction of the Hydraulic Turbine Governing System [PDF]
, 2017 水轮机调速系统是水轮发电机组的关键控制系统。运用故障树与专家系统相结合的方法对调速系统可能发生的故障进行诊断,并基于历史数据,挖掘与故障相关的可能因素,对专家系统无法解决的故障进行分析,构建了基于数据驱动的水轮机调速系统健康状态预测系统。The hydraulic turbine governing system is the key control system of the hydro-turbine generator unit.
周绮凤 +6 more
core +1 more source