Results 81 to 90 of about 11,053 (172)
How much biotic nativeness matters across human demographic groups
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
Background: Canine atopic dermatitis (cAD) is a common, chronic skin condition characterised by epidermal barrier dysfunction, immune dysregulation and cutaneous dysbiosis. While “emollient plus” formulations are widely used in human atopic dermatitis, their role in cAD remains underexplored. Hypothesis/Objectives: To evaluate the clinical efficacy and
Beatriz Fernandes +8 more
wiley +1 more source
考虑动态频率响应的孤岛微电网日前—日内两阶段高分辨率优化调度
高比例新能源渗透的微电网具有惯量低、系统动态频率响应能力弱等特征,处在孤岛运行模式的微电网频率更易受波动。针对微电网频率稳定性问题,将动态频率响应模型加入到优化调度中,推导系统频率安全约束以提高系统调频能力。含动态频率响应约束的调度模型具有多约束、非线性、高维等特征,现有研究中忽略了调度模型线性化的影响。基于此,在考虑动态频率响应的孤岛微电网日前—日内两阶段优化调度模型中引入日内高分辨率离散策略,在日前优化调度的基础上选取能更好的拟合系统净负荷出力曲线的高分辨率进行日内优化调度,修正日前调度计划。最后 ...
张磊, 陈轩妮, 叶婧, 郭志豪
doaj
在应对突发重大传染病时,社区防控是整个社会疫情防控的重要一环。在新型冠状病毒肺炎疫情社区防控实践经验的基础上,提出一个社区疫情排查调度问题的数学模型,根据相关疫情防控信息为社区重点住户估算风险指数,并在此基础上将重点住户分配给各个排查工作小组,为每个小组设定排查路线,从而尽可能高效地完成各项排查任务。为求解该问题,提出一种混合智能优化调度算法,它基于水波优化的启发式策略搜索解空间,并混合了两种局部搜索策略来提高解的精度,形成初步调度方案。在调度方案的实施过程中,如果排查到某个对象有特殊情况需要处置 ...
陈鑫 +4 more
doaj
Analysis of Key Technologies and Development Prospects for Renewable Energy-Powered Water Electrolysis for Hydrogen Production Based on Artificial Intelligence [PDF]
ObjectivesAs an essential sustainable energy technology, renewable energy-powered water electrolysis for hydrogen production has attracted widespread attention due to its advantages in environmental protection and low carbon emissions.
YANG Bo, ZHANG Zijian
core +1 more source
针对风电制—储氢系统的优化调度问题,提出了一种考虑碱性电解槽状态转换的日前出力优化调度模型。该模型以系统日收益最高为目标,结合分时电价,引入电解槽状态转换过程中的冷热启动成本和功率波动成本,满足各个设备动态运行约束及系统功率平衡约束条件,调用Gurobi求解器进行优化求解。采用实际的风电出力数据和电氢负荷数据,对3种典型日场景下的优化结果进行分析。算例表明:所建立的优化调度模型能够满足电氢负荷需求,合理调节电解槽的3种状态,显著降低电解槽功率波动幅度和系统总成本,验证了所提模型的有效性。
郭小龙, 亢朋朋, 田晨, 翟文辉
doaj
Coordinated Optimization of Intelligent Soft Open Points and Multiple Types of Shared Energy Storage in Distribution Networks Considering Flexibility Deficiency Risk [PDF]
ObjectivesTo address the operational security issues in the new-type distribution network caused by the high-penetration integration of renewable energy, this paper proposes a coordinated optimization method for intelligent soft open points and multiple ...
FAN Xiaochao +5 more
core +1 more source
针对游梁式抽油机不能随油井工况自动调整平衡度和冲次,且调整不方便,造成油田设备日常管理难度较大,不利于节能工作开展的现象,研发了一种自平衡智能抽油机。该抽油机在常规机的基础上设计了一套平衡调节装置和特制悬绳器,嵌入了传感器,配套了具有特殊功能的智能控制柜,具有油井功图和电参数的采集和传输,以及根据油井工况变化自动调抽油机平衡度和冲次的功能。现场应用结果表明,该自平衡智能抽油机具有装机功率低、自动化程度高、调参方便可靠的优点,自动优化模式与工频运行模式相比,平均吨液百米耗电量由1.559 kW•h下降到1.
王雪玲 +5 more
doaj
Multi-Virtual Power Plant-Oriented Dynamic Aggregation Control Strategy Based on Hierarchical Partition and Multi-Layer Complementation [PDF]
Virtual power plant (VPP) is a new type of operation mode. It can effectively aggregate a large number of demand side resources and formulate effective dynamic aggregate control strategies to achieve power complemen-tation in different time and space of ...
CHEN Wenbin +3 more
core +1 more source
介绍了 L i Nb O3M- Z干涉仪式强度调制器共面波导 (对称三电极结构 )行波电极的电极宽度、电极间隙、电极厚度以及电极长度的优化设计。
裴丽, 简水生
doaj

