共查询到20条相似文献,搜索用时 46 毫秒
1.
2.
3.
在深入研究目前常用的供热负荷预测方法的基础上,对热负荷预测方法进行了科学的分类,重点评析了ARMA、回归分析法,灰色预测方法,人工神经网络方法的优缺点及适用条件,并对热计量供热系统的负荷预测方法进行了探讨。 相似文献
4.
5.
6.
浅析日本区域供冷供热的负荷预测 总被引:1,自引:1,他引:0
介绍了日本区域供冷供热领域中冷负荷、热负荷、用电负荷、生活热水加热负荷的设计值和全年累计值,以及逐时逐月的变化规律.该数据是基于对大量建筑物的实际能耗进行收集、统计分析后得出的,可供中国设计师在初期规划阶段参考、借鉴. 相似文献
7.
热负荷预测中应用神经网络模型的研究 总被引:1,自引:0,他引:1
区域供热热负荷的变化是典型的非线性变化,供热系统在确定建设规模,制定运行、检修计划方面面临许多因素的影响。本文对神经网络BP算法供热热负荷预测方面的应用在理论上做了一些研究,并引入实例对所建模型进行训练和检验,取得比较满意的效果。 相似文献
8.
为使供热系统能更好更高效地向用户提供热能,对供热系统不同形式的热负荷预测方法进行了科学的分类,并逐一分析进行比较,根据各预测方法特点探讨其适用范围以及待深入研究的方向。 相似文献
9.
10.
本文基于城市建筑系统、城市供热系统以及城市电网系统的内在和外在的联系,构建了1种城市供热领域碳排放预测完整的方法。并从电网结构、供热结构、既有建筑和新建建筑等方面,建立了全场景的理论关联公式,构建了涵盖供应侧和使用侧的供热全场景模型和测算方法。所建立的预测方法具有更高的透明度、可重复性和灵活性。最后,以黑龙江省城市供热系统为例,分析了影响因素互相作用的机理,结合各因素的变动趋势,分场景定性、定量分析了各子系统变化对未来城市供热碳排放的影响,并对2020—2060年黑龙江省集中供热碳排放量进行了预测,为政府今后节能减排的政策优化及政策选择提供了有效借鉴。 相似文献
11.
针对现阶段仅依靠探空资料和潜势预报无法精准地预测雷电高发地区的现状,提出了一种基于潜势预报和雷达回波特征的雷电预报方法。首先采用L1正则化法筛选雷电预报因子,然后对3 h的潜势预报模型进行BP神经网络训练;在此基础上,利用潜势预报结果和雷达回波特征进行二次训练,构建30 min的临近预报模型;最后运用一次典型的雷暴过程进行方法检验,结果表明当概率阈值超过0.4时,临近预报的TS评分明显高于潜势预报。该雷电预报方法在空间精度和时间频率上均有明显提升,对提高雷电预报的准确率具有重要的作用。 相似文献
12.
13.
14.
Charles Jencks 《Architectural Design》2015,85(4):128-133
Charles Jencks has form. One of the most influential architectural authors and thinkers of our time, he has been forecasting futures and anticipating trends for half a century. His 1971 book Architecture 2000: Predictions and Methods gazed into the crystal ball 29 years ahead of the millennium. Here he provides a comprehensive overview of the art of prediction and its widely divergent styles and approaches. 相似文献
15.
Tide Prediction Using Neural Networks 总被引:1,自引:0,他引:1
M. C. Deo & Girish Chaudhari 《Computer-Aided Civil and Infrastructure Engineering》1998,13(2):113-120
Prediction of tides at a subordinate station located in the interior of an estuary or a bay is normally done by applying an empirical correction factor to observations at some standard or reference station. This paper presents an objective way to do so with the help of the neural network technique. In complex field conditions this approach may look more attractive to apply. Prediction of high water and low water levels as well as that of continuous tidal curves is made at three different locations. The networks involved are trained using alternative training algorithms. Testing of the networks indicated satisfactory reproduction of actual observations. This was further confirmed by a high value of the accompanying correlation coefficient. Such a correlation was better than the one obtained through use of the statistical linear regression model. The training algorithm of cascade correlation involved the lowest training time and hence is found to be more suitable for adaptive training purpose. 相似文献
16.
17.
《Planning》2022,(3):71-74
随着现代科学技术的发展,教师迫切需要提高自己知识的深度和广度,因而学科资料室的建 立势在必行。学科资料室的作用及其服务方式和管理方法也有其自身的特点。 相似文献
18.
Prediction of fire detector response 总被引:1,自引:0,他引:1
Jeffrey S. Newman 《Fire Safety Journal》1987,12(3):205-211
Reliable fire detection is an essential aspect of fire protection in residential and industrial applications, both for the safe evacuation of people and for fire control or extinguishment. Assessment of the necessary detection response requires identification/quantification of: (1) the appropriate fire detector characteristics; (2) the environment generated by the fire: and (3) the fire hazard. In this paper, a generalized response theory for fire detectors is presented together with special cases for specific detector types. The fire environment and fire hazard are examined within a defined set of detection criteria and for a selected application to duct fires. 相似文献
19.