基于ARIMA LSTM组合模型的楼宇短期负荷预测方法研究

在楼宇短期负荷预测中,针对单一预测模型难以充分学习负荷时间序列中的特性问题,提出了一种基于自回归差分移动平均-长短期记忆神经网络(ARIMA-LSTM)组合模型的楼宇负荷预测方法。首先,根据灰色关联度选取相似日时间序列数据为训练样本;然后,利用ARIMA模型预测负荷,并将原始数据和ARIM A预测数据之间的误差视为非线性分量;最后,通过LSTM神经网络对误差序列进行校正,得到楼宇短期负荷的最终预测值。通过对上海市某楼宇的预测效果分析,并将其与ARIMA模型、LSTM模型和ARIMASVM组合模型进行对比,验证了所提方法能够有效控制预测误差,提高楼宇负荷预测精度。     

底层框架砌体结构房屋震害特征及抗震对策

底层框架砌体结构房屋为上刚下柔结构体系,在"5·12"汶川地震中遭受了严重破坏.通过对汶川地震中此类房屋震害特点进行总结,分析了相关震害产生的原因.对某工程实例在底层设置不同数量抗震墙以实现第二层与底层侧移刚度比的定量计算,分析不同侧移刚度比对结构薄弱层出现位置的影响,并对此类房屋建筑设计提出了几点建议.     

基于虚拟振荡器的微网逆变器并联系统分析

对含虚拟振荡器(VOS)的微网中逆变器并联控制策略进行建模与稳定性分析。离网状态下,采用VOS控制的逆变器并联相当于VOS控制器本身的并联,且VOS采用数字控制器编程得到。系统环流抑制效果受VOS控制器中谐振参数与激励源(EXS)函数影响。建立VOS控制器二阶系统传递函数和并联同步等效模型,分析了其稳定性与稳定条件。负载阻抗的变化会影响并联逆变器输出稳定,设计EXS模块基于功率均分状态补偿负载电流扰动,提高了输出电压波形的质量。仿真结果验证了所提方法的可行性。     

压密注浆在水工建筑物纠偏中的应用

文章以某堤涵洞因地基不均匀沉降,导致闸头倾斜,压力管断裂为例,介绍了压密注浆在水工建筑物纠偏中的应用     

我国多层轻型房屋钢结构建筑的应用与展望

介绍多层轻型房屋钢结构在我国的应用概况,提出轻型房屋钢结构设计中应注意和研究的问题及其应用前景。     

平原水库浸没地下水临界埋深分析

平原水库蓄水易产生水库浸没,危害周围农作物和建筑物,需确定平原水库地下水临界埋深。对于农作物,水库浸没导致农作物发生渍害和次生盐渍化,利用作物根系层厚度计算防止农作物发生渍害的临界埋深;引入矿化度级差计算防止土壤次生盐渍化的临界埋深,选取两者最大值作为农作物浸没临界埋深。对于建筑物,引入弹塑体结构计算模型,根据承载力与地基应力的关系计算承载力影响下的临界埋深,根据应力分层总和法确定受附加应力影响的临界埋深,最后利用层次分析法计算权重大小,综合考虑各因素确定建筑物浸没临界埋深。通过提出地下水临界埋深评价方法为减轻浸没危害、预测库区可能发生浸没的地区范围提供了依据。     

冀北严寒地区农村住宅节能设计的分析

通过对冀北严寒地区农家住宅围护结构构造的技术及可再生能源利用等方面进行分析,对本区农村住宅的围护结构构造及可再生能源的利用提出一些建议。     

Sustainability assessment of dwellings – a comparison of methodologies

Building sustainability assessment tools (BSATs) aim to promote and rank the sustainability of building stock. This paper makes a deep comparative analysis on how dwellings are evaluated by five BSAT and one performance-based design tool. The comparison is based on: (i) the purpose of assessment; (ii) sustainability dimensions considered; (iii) indicators addressed; (iv) life cycle phases considered by the indicators; (v) type of indicators; (vi) measurements; (vii) aggregation processes; and (vii) life cycle phases during which the assessment was carried out. The evaluation showed that the scope of BSAT varies significantly as well as the life cycle phases addressed in the assessment. Financial issues are often excluded from the assessment. None of the schemes is totally quantitative or qualitative in their measurement system; all have different types of indicators and different ways to assess them. This research provides researchers and stakeholders with important inside knowledge on the tools that allow the development and construction of more sustainable buildings.     

西安通远坊天主教会建筑群的历史沿革及其艺术特征初探

通远坊天主教会建筑群位于西安市高陵县,是清代西北地区天主教总堂,现存的四座建筑天主堂、修女堂、圣心小修道院和育婴堂均建于清末民初,地域特征显著,建造做法肖似,作为一个整体清晰地反映出了当地的匠作传统。本文通过梳理其历史沿革,分析其艺术特征,希望将这一珍贵的内陆天主教文化遗产展示于世人面前。     

Overheating in Scotland: contributing factors in occupied homes

ABSTRACT

There is growing awareness of the overheating risks in new-build properties in the UK. However, this tends to be considered a problem principally for the southern regions in the UK, only becoming a serious issue in the north of England in the medium-term and in the long-term for Scotland. This notion tends to be largely predicated upon climate change predictions, differences in latitude and summer air temperatures. This paper describes the results from Building Performance Evaluation (BPE) studies over a two-year period from 26 occupied new-build homes across Scotland which demonstrated incidences of overheating. Results suggest that low-energy buildings are susceptible to overheating despite northerly latitudes, with 54% of houses studied overheating for more than six months annually, and 27% of homes overheating for less than 10% of the year. Evidence indicated that commonly used prediction tools do not appear to anticipate overheating adequately. This paper maps common overheating causes due to design and the role of occupants, identifying the risks due to the regulatory system, prediction and procurement processes, and design and construction. A common finding was that design and occupancy factors appear to have a greater impact on overheating more than location and climatic factors.