Results 11 to 20 of about 1,259,370 (186)

基于系统动力学模型的电力系统等效惯量时空演变趋势研究 [PDF]

open access: yes全球能源互联网
随着风电、光伏等新能源发电渗透率的不断提高,电力系统等效惯量水平不断下降且空间分布不均的特性日益凸显。而电力系统维持频率稳定的能力与系统等效惯量水平息息相关,因此明确电力系统等效惯量时空演变趋势具有重要意义。基于系统动力学模型,对电力系统等效惯量的时空演变趋势进行了分析。首先,明确新能源电力系统等效惯量概念及有效惯量组成,并分析惯量响应过程;其次,基于系统动力学模型,在考虑地域、技术进步率、综合成本等多因素影响下,对中国各地区光伏、风电、火电、水电、核电2025—2060年间的装机容量进行预测;最后 ...
刘学成   +7 more
doaj   +1 more source

平行港口:智慧绿色时代下港口工业智联网新形态与体系结构

open access: yes智能科学与技术学报, 2021
旨在讨论智能绿色时代下港口工业的现状需求、体系结构、新形态和其关键平台技术等问题。首先介绍了智慧绿色时代下港口工业的现状和需求,并详细描述了平行港口工业体系结构与新形态;然后讨论了智慧绿色时代下港口工业中的工业智联网、知识自动化和人机混合增强智能等新一代技术;最后讨论了平行港口在智慧绿色时代中的具体应用场景和案例,重点围绕港口船舶管理系统进行分析。
吴宇震   +4 more
doaj  

深度强化学习算法与应用研究现状综述

open access: yes智能科学与技术学报, 2020
深度强化学习主要被用来处理感知-决策问题,已经成为人工智能领域重要的研究分支。概述了基于值函数和策略梯度的两类深度强化学习算法,详细阐述了深度Q网络、深度策略梯度及相关改进算法的原理,并综述了深度强化学习在视频游戏、导航、多智能体协作以及推荐系统等领域的应用研究进展。最后,对深度强化学习的算法和应用进行展望,针对一些未来的研究方向和研究热点给出了建议。
刘朝阳, 穆朝絮, 孙长银
doaj  

Changes of Potential Suitable Areas for Lynx Under Climate Change in Mohe Area, Daxing'anling Mountains, China 气候变化下中国大兴安岭漠河地区猞猁潜在适宜区的变化

open access: yesWildlife Letters, EarlyView.
Climate change drives shifts in suitable habitats for Eurasian lynx and its prey (hare, roe deer) in Mohe, Daxing'anling Mountains. Under RCP scenarios, moderate warming (RCP4.5) promotes substantial habitat expansion, while high‐emission conditions (RCP8.5) lead to strong expansion in the 2050s but slower gains and partial contraction by the 2070s ...
Binglian Liu   +5 more
wiley   +1 more source

Using Harvest Data to Assess Factors Influencing Regional Population Declines of Muskrats (Ondatra zibethicus) 利用捕获数据评估影响麝鼠 (Ondatra zibethicus) 区域种群数量下降的相关因素

open access: yesWildlife Letters, EarlyView.
Reported annual per‐capita harvest of muskrats (PCHM) decreased as wetland complexity (total number of wetland patches) decreased in 13 state and federal wetland areas in the Midwest, USA. Our results support the hypothesis that regional‐scale declines in the abundance of muskrats are likely associated with the losses to wetland habitats throughout the
Tim L. Hiller   +5 more
wiley   +1 more source

Context‐Dependent Effects of Beavers (Castor spp.) on Freshwater Pearl Mussels (Margaritifera margaritifera) in European Rivers 河狸对欧洲河流中的淡水珍珠贝 (Margaritifera margaritifera) 存在情境依赖性影响

open access: yesWildlife Letters, EarlyView.
The study explores how beavers (Castor spp.) affect endangered freshwater pearl mussels (Margaritifera margaritifera) in European rivers. Beaver dams can harm small, fragmented mussel populations by reducing flow, increasing sediment, and potentially limiting host fish movement, while larger populations may benefit from improved bed stability and ...
Louise Lavictoire   +2 more
wiley   +1 more source

Precipitation‐mediated asymmetric fitness consequences of nectar robbing in distylous Primula florindae

open access: yesFunctional Ecology, EarlyView.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Flowers with deep corollas are frequently associated with nectar robbing, a behaviour that often reduces pollen transfer and seed production. Robbing scars, however, may further affect plant reproductive success through rainwater entry into corolla tubes.
Wu Sun   +6 more
wiley   +1 more source

基于数据引擎技术的工业互联网平台

open access: yes智能科学与技术学报, 2020
近年来,工业互联网的发展浪潮引起了学术界与工业界的高度关注,目前工业互联网的发展中仍存在设备通用性弱、软件动态重构能力差等问题。基于上述问题,设计了一种IAP工业互联网通用平台,该平台基于数据架构驱动引擎技术(数据引擎),可实现异构平台中的数据同构化、动态化处理。同时还设计了 IAP 工业互联网通用平台测试床,通过系列实验展示了该平台的特色优势,为实现工业互联网的互联互通提供了新的技术方案。
李达, 郑松
doaj  

臭氧微气泡/紫外光处理费托合成水的研究

open access: yesGongye shui chuli, 2023
利用臭氧微气泡/紫外光处理费托合成水,研究臭氧微气泡/紫外光对小分子氧化物脱除过程的影响。首先获得了微气泡的最优粒径分布,再分别对费托合成水及其主要单一组分的水溶液进行氧化处理,并对臭氧微气泡/紫外光体系的氧化效果进行表观动力学分析。结果表明,微气泡可增强气液传质,提高臭氧氧化处理效率,COD降解率随微气泡直径减小呈现先增大后减小的趋势,最佳气泡中位径为25.20 μm;在不同紫外光强、氧化体系、反应温度下,臭氧微气泡/紫外光体系氧化费托合成水的COD脱除率均符合准一级反应动力学规律,光强越强、温度越高,
贾梦磊, 李国强, 耿春宇, 高琳
doaj   +2 more sources

Advancing conservation breeding programs for marine invertebrates

open access: yesConservation Biology, EarlyView.
Abstract In the face of ecosystem change and biodiversity loss caused by climate change and other stressors, conservation breeding, or captive breeding, with the aim of reintroduction for wild population recovery, is an emerging tool for preventing species’ extinction and rehabilitating ecosystems.
Elora H. López‐Nandam   +3 more
wiley   +1 more source

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