苏南现代化进程中的遥感土地利用动态监测——以苏、锡、常地区为例

地少人多的广大苏南地区早在６０年代已形成了强大的经济实力,改革开放以来,乡镇企业的迅速崛起带动了地区经济的全面发展。随着苏南经济的迅速发展,土地开发和利用方式也发生了较大变化。人地矛盾、人与空间的不协调日益严重。改善投资环境、合理利用城市土地、促进苏南经济的持续、快速发展,必须更好地实现土地利用的动态监测。为了适应这种新的需求,本文以苏、锡、常地区土地动态变化研究为背景,采用人机交互式解译遥感图像,将多时相遥感信息进行复合,用地理信息系统软件进行分析处理并输出图件。并对苏、锡、常地区的土地利用动态变化特点、各类型变化情况进行了具体分析。实践证明,该方法是行之有效的     

Uncertainty analysis of predicted disturbance from off-road vehicular traffic in complex landscapes at fort hood

The US Army Engineering Research Development Center (ERDC) uses a modified form of the Revised Universal Soil Loss Equation (RUSLE) to estimate spatially explicit rates of soil erosion by water across military training facilities. One modification involves the RUSLE support practice factor (P factor), which is used to account for the effect of disturbance by human activities on erosion rates. Since disturbance from off-road military vehicular traffic moving through complex landscapes varies spatially, a spatially explicit nonlinear regression model (disturbance model) is used to predict the distribution of P factor values across a training facility. This research analyzes the uncertainty in this model's disturbance predictions for the Fort Hood training facility in order to determine both the spatial distribution of prediction uncertainty and the contribution of different error sources to that uncertainty. This analysis shows that a three-category vegetation map used by the disturbance model was the greatest source of prediction uncertainty, especially for the map categories shrub and tree. In areas mapped as grass, modeling error (uncertainty associated with the model parameter estimates) was the largest uncertainty source. These results indicate that the use of a high-quality vegetation map that is periodically updated to reflect current vegetation distributions, would produce the greatest reductions in disturbance prediction uncertainty.     

关于模糊综合指数与模糊向量加权记分

通过将模糊向量加权记分与模糊综合指数的计算步骤、计算内容和方法一一进行比较,证明模糊向量加权记分与模糊综合指数无本质差异。所采用的分制规定差异,只能使模糊向量加权记分所得结果更加不合理。采用模糊综合指数法,选用恰当的权重,可以克服“优劣倒置”现象。     

凌钢52 m2烧结机混料系统除尘设计

对58m^2烧结机混料系统原除尘状况进行了详细分析，对新建52m^2烧结机混料系统通风除尘设备选型、设计方案及效果进行了详尽的阐述。     

Learning Machines Applied to Potential Forest Distribution

The clearing of forests to obtain land for pasture and agriculture and the replacement of autochthonous species by other faster-growing varieties of trees for timber have both led to the loss of vast areas of forest worldwide. At present, many developed countries are attempting to reverse these effects, establishing policies for the restoration of older woodland systems. Reforestation is a complex matter, planned and carried out by experts who need objective information regarding the type of forest that can be sustained in each area. This information is obtained by drawing up feasibility models constructed using statistical methods that make use of the information provided by morphological and environmental variables (height, gradient, rainfall, etc.) that partially condition the presence or absence of a specific kind of forestation in an area. The aim of this work is to construct a set of feasibility models for woodland located in the basin of the River Liébana (NW Spain), to serve as a support tool for the experts entrusted with carrying out the reforestation project. The techniques used are multilayer perceptron neural networks and support vector machines. Their results will be compared to the results obtained by traditional techniques (such as discriminant analysis and logistic regression) by measuring the degree of fit between each model and the existing distribution of woodlands. The interpretation and problems of the feasibility models are commented on in the Discussion section.     

扬州电厂200MW机组烟气脱硫石灰石制粉系统

介绍了扬州电厂石灰石制粉系统、主要设计参数及其核心设备的技术特点，为同类工程提供参考。     

浅谈安全管理“三要素”

安全管理是安全科学的重要组成部分。“人—机—环境“是安全管理的 3个基本要素 ,安全管理必须围绕这 3个基本要素建立安全管理体系 ,协调“人—机—环境”的自然和谐 ,将“人—机—环境”建立在一个最优组合状态下 ,把安全问题由事后处理型转变为事先预防型 ,从而提高安全管理体系的效能和水平。     

污泥脱水机械的选择讨论

CaSO4沉淀污泥的脱水因化学性质的特殊性，在脱水机械的选用上应考虑一些影响其脱水的因素，对部分影响因素作一些探讨。     

高档普采工作面端面顶板的有效支护

端面顶板是高档普采工作面顶板管理的重点，分析了п型钢梁支护法的不足，提出了一种新的支护方法，通过应用取得了良好效果。     

基于传递熵与KELM的炼油化工过程风险传播路径分析方法

基于炼油化工过程复杂,设备众多,某一设备的监测变量发生扰动可能会传播至其相邻设备引发出一系列故障链。现有方法多是针对某一设备进行监测与诊断,以期降低事故后果,而忽视了对过程风险传播路径的预测以防止事故的发生。因此,提出一种基于传递熵与核极限学习机的炼油化工过程风险传播路径分析方法,该方法针对某一工艺扰动,分析其在风险发展过程中的扰动传播过程,基于传递熵分析法建立炼油化工过程风险传播推绎模型;并提出一种基于KELM的风险传播搜索方法,预测风险传播路径;将该方法应用于分馏塔冲塔过程。研究结果表明:该方法可辨识出未来一段时间内风险的可能传播路径,以便操作人员及时采取预防措施,保证过程安全及产品质量。