灰色区间预测的新方法

针对具有离散程序大且总体趋势增长的一类序列，给出了一种灰色区间预测的新方法，该方法是先讨论序列的级比，对级比选取一些不同的阈值，根据不同的阈值对原始数据列进行分组，然后对各个分组序分别建立非等时距的灰色模型，由模型的解得出原始序列的预测值范围。     

非均匀推移质级配的初步研究

本文在大量实验的基础之上,对推移质级配、床沙组成和水力要素三者之间的关系进行了探讨。根据脉动流速服从正态分布和输沙平衡时床沙与推移质泥沙颗粒的交换处于平衡状态的概念,经力学分析、数学推导和试验研究,得到了适合于宽级配非均匀沙河槽的推移质级配计算式和计算方法。用本文方法预报的推移质级配曲线与实测级配曲线吻合良好。     

二元论方法在桥梁方案比选中的应用

选择桥梁设计方案,涉及诸多因素,这些因素在某些情况下相容,在某些情况下又相斥。为了协调这些复杂关系,并降低人为因素的影响,引入两级模糊优选模型及非结构性模糊决策理论。并运用此模型,进行桥梁的设计选型优化,得到了比较理想的结果,证明了此模型在桥梁方案比选中的实用性。     

Floating Car Data Based Nonparametric Regression Model for Short-Term Travel Speed Prediction

A K-nearest neighbor (K-NN) based nonparametric regression model was proposed to predict travel speed for Beijing expressway. By using the historical traffic data collected from the detectors in Beijing expressways, a specically designed database was developed via the processes including data filtering, wavelet analysis and clustering. The relativity based weighted Euclidean distance was used as the distance metric to identify the K groups of nearest data series. Then, a K-NN nonparametric regression model was built to predict the average travel speeds up to 6 min into the future. Several randomly selected travel speed data series, collected from the floating car data (FCD) system, were used to validate the model. The results indicate that using the FCD, the model can predict average travel speeds with an accuracy of above 90%, and hence is feasible and effective.     

预应力群锚锚具在非预应力吊杆中应用的关键技术

目前，中(下)承式拱桥吊杆越来越多的采用预应力钢绞线和预应力群锚锚固体系。从预应力群锚锚固原理分析，预应力群锚锚具在非预应力结构中应用的关键技术是采取工艺措施，以防止锚具尖劈效应失效的滑锚和吊杆振动发生弹性闪动而产生的退锚。     

一维沥青混凝土杆性状分析

分别采用公式法和有限单元法，对不同环境条件下的沥青混凝土杆累积温度应力计算，通过计算说明了有限单元法的有效性。接着考虑沥青混凝土因降温导致的非均匀性后，对一维沥青混凝土杆的开裂温度进行了预测，最后对沥青混凝土的应力松驰规律进行了分析。     

城市道路平面交叉口机非冲突案例分析

城市道路交叉口的机非冲突是造成交叉口拥堵的重要原因。通过对上海某机非混行交叉口进行实地调查,对影响交叉口交通安全的因素进行了分析。最后,提出了相应的道路交通改善措施。     

AN EXPERIMENTAL STUDY ON REMOVAL OF NOx IN FLUE GAS AT THENONEQUILIBRIUM PLASMA

Removal of nitrogen oxides (NOx) in flue gas by means of nonequilibrium plasma technology is a very prospect and attractive method. As the nonequilibrium plasma micro discharges can generate a powerful energy flux, imparted to the flue gas, the molecules and atoms of pollutants are motivated and decomposed, and then NOx in the flue gas are decomposed and conversed in the particular conditions. Based on nonequilibrium plasma in combination with catalytic principle, an experimental investigation on NOx decomposition and conversion with AI2 03 catalysts was carriedout and the NOx removal rate up to 95% was obtained. The NOx decomposition and conversion principle with AI2O3 catalysts was also discussed.     

“桩—土”非均质系统弹性动力响应的数值分析及其应用

为了对“桩－土”非均质系统的弹性动力响应进行研究，根据桩侧土的非均匀性以及桩结构的缺陷特征，建立了一个“桩－土”非均质系统的动力学模型，并导出了其数值解。并以模型桩为计算实例，通过计算结果与实测曲线的对比，识别出桩土参数，用于评价桩结构的完整性。     

一种新型非接触式IC卡电路

利用变压器原理并通过对需要传输的信号调频调幅，实现非接触能量和信号的双向传播，这种传播方式不仅可以用于ＩＣ卡，同时也可以应用于其它恶劣环境下信息的采集以及可编程部件内的软件更换。