结构地震反应性态的物理随机最优控制

本研究发展了结构地震反应性态的随机最优控制理论和方法.这一研究建立在物理随机系统思想的新理论框架下,突破了以It(o)随机微分方程描述动力系统的经典随机最优控制的藩篱.提出了基于系统二阶统计量评价、单目标超越概率和多目标能量均衡的控制器参数设计准则,以及基于概率可控指标的控制器位置设计准则,并将它们统一为物理随机最优控...     

Energy and temperature performance analysis of geothermal (ground source) heat pumps integrated with permeable pavement systems for urban run-off reuse

Geothermal (ground source) heat pumps (GHP) and permeable pavement systems (PPS) have demonstrated their effectiveness in both industry and academic research during recent decades. To meet the rising demand for sustainable, recyclable and energy efficient techniques, research has focused on the combination of techniques to enhance existing or develop new applications.

This paper reports on an experimental programme that combined GHP with PPS for nutrient removal and system energy balancing. Experimental data collected over a 3-year period have provided evidence of highly efficient removal rates of up to 99% for ammonia–nitrate and biochemical oxygen demand; and 96% removal rates were obtained for orthophosphate–phosphorus. This paper also contains energy efficiency ratio (EER) and coefficient of performance (COP) calculations. Cyclic heat removal and heat rejection allowed for stable temperature and pump COP and EER sustainability. The results prove that PPS systems are appropriate for GHP installation, delivering high and stable pollutant removal with EER efficiencies between 1.5 and 5.5.

The combination of GHP with PPS has the potential to provide a new sustainable and eco-friendly practice.     

脱硫成本—地面浓度响应模型理论和案例初探

综合分析了目前二氧化硫削减技术政策现状,提出了一种评价二氧化硫治理效率的指标——单位投资地面浓度改善水平。利用该指标对一个地区SO2污染源进行评价,通过设定基金激励机制,吸引高效率的污染源积极完成污染治理任务,并应用博弈论分析基金如何影响企业污染治理决策,达到以较小成本控制污染的目的。通过案例的计算,比较A-P浓度贡献法削减方案和文章推荐方案的脱硫经济成本和环境效益。     

基于监测数据的土壤源热泵系统设计优化分析

针对建筑中地源热泵系统实际地下换热过程复杂、设计困难等问题,以苏州地区某浅埋式地源热泵系统为研究对象,运用TRNSYS软件搭建地源热泵仿真模型,对一定条件下埋管内冷却水流速与地源热泵系统性能的耦合关系进行了模拟分析。仿真结果表明相同蓄热体积下埋管深度对系统性能影响较小。增大冷却水流速有利于土壤温度恢复,但系统耗电量增加。该浅埋式地源热泵系统冷却水流速1~2 m/s均在合理范围内,且埋管深度越大,最佳设计流速越小。     

承德市隆化县茅荆坝地热资源的开发利用

承德市隆化县茅荆坝地热资源丰富,受断裂构造控制,属隐伏基岩裂隙、松散岩孔隙型热储,水温最高可达90℃,地温可达30～40℃,水量充足,水中含有多种医用保健化学成分,但在开发利用中存在着项目单一、利用率不高、资源浪费等问题。地热综合利用和地热梯级利用的开发利用模式,即多目的利用、按不同温度逐级利用,加强科学管理,采取限量打井,限制开采。     

模型预测在土地利用规划中的应用

阐述了4种预测模型的原理，并以新疆喀什市的城市用地预测为例，通过时间序列建立了4种预测模型，对城市用地实际值进行预测与分析，从而得出各种模型的特点。认为只有选择最适合的预测模型，才能为土地利用规划提供科学依据。     

IRRIGATION METHODS AND TRANSPORT OF IMAZAMETHABENZ‐METHYL TO GROUND WATER: GREENFIELDS BENCH,MONTANA1

ABSTRACT: A series of gravel terraces support a shallow aquifer that is the sole source of drinking water for three public water supplies and more than 400 private wells on the Greenfields Bench in west‐central Montana. Farming practices on the Greenfields Bench include irrigation of malting barley and the yearly application of herbicides for the control of weeds. The most commonly used herbicide (imazamethabenz‐methyl, U.S. trade name Assert®) has been found in the ground water on the Greenfields Bench. An experiment was conducted in 2000 and 2001 to characterize the transport of Assert and its acid metabolite to ground water under three irrigation methods: flood, wheel line sprinkler, and center pivot sprinkler. Results show that Assert concentrations in ground water are controlled by hydraulic loading rates of each irrigation method, Assert persistence in soil, hydraulic characteristics of the aquifer, and adsorption/desorption of Assert onto clay particles and organic matter.     

地铁深基坑变形规律参数化方法探讨

在对基坑隆起、基坑围护桩体水平变形以及基坑周边地表沉降产生机理、变形规律和影响因素分析的基础上,提出各测项的变形模式：基坑隆起为抛物线模式,围护桩体水平变形和基坑周边地表沉降为双直线模式.变形模式中的参数取值与基坑条件（包括工程、水文地质条件、岩土体物理力学性质、支护结构形式等）存在对应关系.给出了以监测数据为基础的各变形模式参数的线性回归方法,为建立以回归参数控制的预测分析库奠定基础.     

营口鲅鱼圈港疏浚物倾倒区最优化选择

本文首先将层次分析法应用于倾废区选划上。该法是一种能较好地解决定性与定量相结合的复杂问题的多准则决策方法。经过几年的验证，选择的倾倒区合理。     

小清河沿岸地下水污染强度及发展速度预测的研究

对小清河流域工业废水污染源，河水，地下水进行了监测分析和综合评价，重点进行了有机化合物的监测，研究了距河一定距离内地下水的污染强度现状。在对小清河沿岸水特征。地质钻孔资料和水质监测结果综合分析基础上，以Ｉ作示踪剂模拟污染物质，进行了潜水不质污染野外模拟，得出小清河沿岸潜水纵向弥散系数，建立了水质污染测数学模型，预测了地下水污染的发展速度。