Results 101 to 110 of about 9,870 (187)
Gaoya dianqi, 2022 针对大规模电动汽车（EV）随机接入电网时，电动汽车无序充电将会导致电网用电量增加，负荷峰谷差值变大，如何有效降低电动汽车带来的用电负荷风险是未来关注的重点。文中提出了基于车网互动（vehicle to grid,V2G）的电动汽车充放电双层优化调度策略。其中，上层模型以电网总负荷方差最小和代理商调度计划偏差最小为目标函数；下层模型以用户参与调度意愿和调度能力为基础，在代理商配合调度中心计划的前提下，注重提高用户参与度和用户收益最大化。采用多种群遗传算法对模型进行分析，结果表明 ...
肖丽 +7 more
doaj
, 2012 随着能源与环境危机日益严重,如何建立精确调度模型成为电力市场逐步完善过程中的一个迫切需要研究的课题.目前广泛采用的建模方式是将时间离散化,建立离散时间调度模型,本文首先举例说明离散时间调度模型中所定义的备用容量上、下限存在不可达的情况,即离散时间调度模型中的备用容量上、下限约束条件不严格,从而造成实际调度时存在旋转备用容量无法满足实际需求的情况.通过对机组出力方式与爬坡率关系的详细分析,证明了任意调度时段内机组精确可达的备用容量上、下限与该时段首末时刻机组输出功率相关,并给出了精确可达备用上 ...
吉国力 +4 more
core
Issue Attention in Public Opinion Polls: Pollsters as Agenda Responders and Agenda Setters
Policy Studies Journal, EarlyView.ABSTRACT Polling organizations, like other policy actors, must prioritize certain issues. We argue that, for normative and financial reasons, pollsters prioritize issues that are viewed as important by other institutions and the public, leading them to focus survey questions on issues that are on congressional and media agendas, and which are public ...
Qian Zhang +2 more
wiley +1 more source
Shiyou jixie, 2014 为使煤层气排采生命周期更长、煤层气产出量最大化，对地面直驱螺杆泵在煤层气排采中的生产参数进行了优化研究。综合考虑煤层气排采制度及井、泵之间的供排协调的实际约束条件，建立以生命周期内煤层气产气量最大为优化目标的数学模型。引入煤层气井生产数值模拟结果，将其作为优化过程中的参数，将煤层气井生产排采制度这一较难表征的约束条件恰当转化，以适当的时间段内压降值作为计算排水量的依据，编制优化流程图，按照优化流程及其他各约束条件对生产参数进行优化。通过具体实例验证了优化方法的有效性。
孙艳萍, 赵, 宁, 屈文涛, 刘, 庆
doaj
Veterinary Dermatology, EarlyView.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
Guangtongxin yanjiu, 2017 针对传统电力调度数据网络路由方法不能多因素综合考虑的问题,基于服务质量基本理论,结合线路规划,提出一种基于电力调度数据网的综合路由优化方法。该方法通过引入调度数据网的业务需求和优先级关系,将网络服务质量、负载和线路成本作为目标函数,可用于在电力调度数据网中寻找使用网络资源较少、链路建设成本较低且网络负载较低的路由路线。仿真结果验证了方法的可行性,并与传统的路由策略进行了对比分析。
高会生, 赵百捷
doaj
Gaoya dianqi, 2022 提出了一种基于改进天牛须算法的含固态变压器（solid-state transformer,SST）的配电网无功优化方法，通过调节SST的调制系数和相位角补偿系统的无功功率。文中首先对SST进行数学建模，其次针对天牛须搜索算法（beetle antennae search algorithm,BAS）在低维度空间表现优异，在5维及以上空间存在收敛速度慢，精度低的问题，在BAS的基础上引入了模拟退火算法（simulated annealing algorithm,SA ...
张晓英 +4 more
doaj
Review of Energy Management Systems for Islanded Microgrids [PDF]
ObjectivesAgainst the backdrop of energy resource scarcity and increasing environmental demands, distributed energy supply technologies, particularly renewable energy technologies, have attracted significant attention due to their high energy efficiency,
BIE Yu +4 more
core +1 more source
Latin American Policy, Volume 17, Issue 1, March 2026.ABSTRACT The rise of ride‐hailing platforms has profoundly transformed urban mobility in Latin America over the past decade. Transportation Network Companies such as Uber, DiDi, Cabify, InDrive, and others operating in the region have affected transportation patterns and intensified debates around labor relations, algorithmic management, regulatory ...
Ronald Sáenz‐Leandro
wiley +1 more source
Effects of landscape fragmentation on floodplain fishes as revealed by species–habitat networks
Conservation Biology, Volume 40, Issue 1, February 2026.Abstract How species interact with habitat patches is influenced primarily by habitat configuration (e.g., connectivity) and species’ functional traits. As levels of fragmentation increase, identifying the intricate connections between these components is crucial for biodiversity conservation.
Chen Zhang +8 more
wiley +1 more source