室外干球温度(日段部分)逐时预测研究

在许多领域的计算与应用中,常需借助室外干球温度的逐时资料。以可照时数为依据,可把室外干球温度划分为两大部分,分别为室外干球温度日段与夜段部分。本文通过改进递归神经网络,以气象站记录的室外干球温度日4值历史数据以及它的影响因素为基础,再结合室外干球温度日段部分的特性,建立了室外干球温度日段逐时预测模型。预测结果显示所建立的模型是合理可靠的。     

大瑶山隧道九号断层的特性与工程对策

本文论述了宽达465m的大断层的地质构造、岩体结构、地下水及围岩变形等特性,并介绍了为安全顺利通过断层所采取的工程措施。     

阳泉市城市河道的规划和展望

介绍了阳泉市城市河道防洪工程的发展过程 ,并提出了河道未来规划的建议 ,指出城市防洪工程作为城市的生命线工程 ,要结合自身特点 ,全面规划、综合治理 ,以实现城市的可持续发展     

北京市建筑业近期发展的预测

从2006年上半年北京经济发展综述和北京地区经济发展形势与趋势分析入手,对近期北京建筑市场热点预测进行了分析,以促进北京建筑业的发展。     

合肥市多层砖混结构房屋震害预测

多层砖混结构房屋震害研究的结论，表明了厂多层砖混结构房屋的震害状况、破坏位置状况等。对震害的预测分析，可为抗震设计及加固提供借鉴作用。     

Evaluation of the FEH Rainfall-Runoff Method for Catchments in the UK

The Flood Estimation Handbook, which was published in 1999, has substantially replaced the Flood Studies Report for design flood estimation in the UK. Although there are substantial differences between the handbook and the report, the philosophy of the rainfall-runoff method has been retained in the handbook. However, there are differences in the equations that have been used to estimate parameters of the rainfall-runoff method.
This paper provides a comprehensive evaluation of the performance of the Flood Estimation Handbook rainfall-runoff method for flood-frequency estimation, using data from eighty-eight catchments in the UK. The performance is evaluated by reference to the flood quantiles obtained from single-site frequency analysis, and comparison is made with the performance of the Flood Studies Report methodology. In general terms, the handbook over-estimates flood quantiles, with respect to (a) those estimated from observed records and (b) the report's quantiles. The paper explores the causes of these over-estimations and seeks linkages with particular catchment characteristics.     

Post-Implementation Appraisal of a Two-Stage Channel in the River Roding, Essex

T he performance of a two-stage river channel is examined from a combination of collected field data on the River Roding and a hydraulic model study. Particular attention is paid to the vegetation on the upper channel berm, including its seasonal effect on hydraulic resistance and the problem of channel maintenance. Recommendations are made with respect to (a) increasing the present capacity of the River Roding, and (b) the future design of two-stage flood channels intended to meet stringent environmental standards.     

Benefits of Flow Data for Flood-Protection Design

Stream gauging data play a vital role in the planning of flood mitigation strategies. A study of the value of stream flow data for the design of levee systems shows that the availability of a reasonable sample of pertinent data can be worth many times the cost of collecting that data.     

巷道和边坡的稳定位移与突发失稳时间预测

本文从位移时序曲线的特征出发，提出并验证了用加速度作为状态识别判据的可行性。对于稳定的情况，讨论了用灰色系统ＧＭ（１，１）模型预测最终收敛位移；对于失稳的情况，建立了用割线角估算失稳时间的一般公式。     

滑坡预测预报研究现状述评

滑坡是主要的地质灾害类型之一 ,其危害和影响程度仅居地震、火山之后。如何对滑坡发生的时间和空间进行预测预报是当今的一个研究热点。本文主要介绍了目前国内外使用较多且较成功的预测预报方法 ,分析了当前预测预报中存在的问题 ,并提出了相应的建议。