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数据与误差驱动的典型行业用电量预测方法研究 [PDF]

open access: yes全球能源互联网, 2023
在新常态经营形势下,用电量的精细化预测对于电力系统的安全、稳定、经济运行具有重要意义。采用基于数据驱动与误差修正的递进式思路,研究行业用电量主要影响因素辨识与预测方法。首先,在数据驱动层面,从相关度和冗余度角度应用最大信息系数和最大关联-最小冗余性初步识别主要影响因素。其次,在误差驱动层面,采用随机森林方法考虑误差进行影响因素精筛。再次,构建考虑了递进式主要影响因素辨识的行业用电量预测模型。预测模型应用自组织映射方法对典型行业的细分行业用电数据样本集进行聚类 ...
赵阳   +4 more
doaj   +1 more source

多因素影响下浑水膜孔肥液入渗土壤水分运移特性

open access: yesShuitu Baochi Xuebao, 2021
为研究不同因素对浑水膜孔肥液入渗土壤水分运动特性的影响,开展室内土箱入渗试验,试验设土壤初始含水率、土壤容重、含沙率和肥液浓度4因素,每个因素设3个水平,共12组试验(9组正交试验,3组验证试验)。分析影响因素对浑水膜孔灌肥液入渗单位膜孔面积累积入渗量、入渗率及湿润体平均体积含水率增量的影响。利用多元回归推求并验证单位膜孔累积入渗量和湿润体平均体积含水率增量与影响因素的经验模型和模型参数。结果表明:土壤初始含水率、土壤容重、含沙率和肥液浓度对单位膜孔累积入渗量影响极显著 ...
张全菊   +5 more
doaj  

电抗器开断过电压影响因素关键性辨识

open access: yesGaoya dianqi, 2023
针对真空断路器投切电抗器造成的过电压问题,提出了影响过电压幅值和持续时间关键因素的辨识方法:首先构建了真空断路器投切过电压事故树模型,分析了影响因素的作用过程;其次,搭建了基于神经网络的预测模型,对电抗器投切过电压影响因素灵敏度进行分析,量化各影响因素对过电压幅值与持续时间的作用程度;最后,以某一实际配电网为例构建电抗器投切仿真模型,遍历各影响因素可能取值,模拟电抗器投切过电压过程,对比与分析杂散电容、电缆长度、介电强度上升率、真空断路器分闸时刻和线路电感等8个主要影响因素的作用,结果表明,杂散电容 ...
吴伟丽, 陈文梅, 李磊, 奚涛
doaj  

降水再分配受雨强、坡度、覆盖度影响的机理研究

open access: yesShuitu Baochi Xuebao, 2006
降雨过程中有诸多因素可以影响径流量和入渗量,根据11场模拟降雨实验的数据资料,采用单因素着手多因素分析的方法,最终得出以下几点结论:①降雨强度是影响径流和入渗的决定因素,但是覆盖度的增加可以影响到雨强的作用效果,主要表现为径流量的相对减少和入渗量的相对增加。②坡度对径流和入渗的作用效果会受到降雨强度的影响,即不同因素对径流和入渗的影响并不是简单因素影响值的几何相加,它们是互相促进的,影响效果将大于几何加值。③根据覆盖度产生原因的不同.覆盖度对径流和入渗产生影响的途径是不同的,因此不能一概而论 ...
吴希媛, 张丽萍
doaj   +2 more sources

Age, embryo donor status, and insemination with chilled semen all predispose to persistent breeding‐induced endometritis in warmblood mares

open access: yesEquine Veterinary Journal, EarlyView.
Abstract Background Persistent breeding‐induced endometritis (PBIE) is a common reason for mares failing to establish pregnancy. Objective To examine the hypothesis that advancing mare age and embryo donor status predispose to PBIE and compromise fertility.
Tom Stout   +3 more
wiley   +1 more source

基于水土流失态势的山西省生态脆弱性分区研究

open access: yesShuitu Baochi Xuebao, 2003
从研究山西省生态脆弱性形成的客观条件人手,研究了山西省生态脆弱性的控制影响因素和基础影响因素,对基础影响因素的指标进行计算处理,求出了山西省各县市基础影响因素的综合指标值,在此基础上把山西省划分了5个生态脆弱类型区,并对今后进一步研究生态脆弱类型区提出了合理化的建议。
赵艺学
doaj   +2 more sources

Intangible drivers of tolerance shape human–elephant coexistence in Southwest China

open access: yesPeople and Nature, EarlyView.
Abstract Southwest China is home to a small but rapidly expanding population of Asian elephants (Elephas maximus), whose growth has intensified conflicts with people living in shared landscapes. These conflicts result in substantial economic losses and occasional human casualties. This coexistence paradox—where conservation success leads to significant
Xiaoyu Yu   +4 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

Organ‐specific ozone and nitrogen legacies strengthen substrate control over litter decomposition

open access: yesFunctional Ecology, EarlyView.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Elevated tropospheric ozone (O3) and nitrogen (N) deposition are concurrent atmospheric changes that strongly influence terrestrial carbon cycling, yet their combined effects on below‐ground decomposition remain poorly understood.
Xiaofan Hou   +8 more
wiley   +1 more source

Analysis of factors regarding the perceived distance of tourists(旅游者感知距离的影响因素分析)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2016
感知距离对旅游者的目的地选择行为具有重要影响.运用独立样本T检验法和单因素方差分析法对旅游者感知距离的影响因素进行了研究.得到:在同等实际距离水平下①性格是影响感知距离的显著因素,性格外向的旅游者的感知距离比性格内向的旅游者的感知距离近.②目的地有无亲友是影响感知距离的显著因素,在目的地有亲友的旅游者的感知距离比在目的地无亲友的旅游者的感知距离近.③旅游目的是影响感知距离的显著因素,以商务会议或探亲访友为目的的旅游者的感知距离比以纯旅游为目的的旅游者的感知距离近.④旅游次数是影响感知距离的显著因素 ...
ZHOUFangru(周芳如)   +5 more
doaj   +1 more source

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