基于影响因子分析的滑坡位移预测模型研究

将滑坡的影响因索引入到滑坡的位移预测模型中．从滑坡的位移动态变化特征和响应组成组分研究入手,将滑坡的位移分解为趋势项、周期项、脉动项和随机项．针对每一项进行研究,分别选取合适的影响因子变量和函数关系来模拟,并将各项耦合在一起得到位移的初步预测模型。通过对监测数据进行非线性多元统计回归分析,得到位移的最终预测模型。以长江三峡库区的新滩滑坡为实例,通过验证研究,发现将滑坡的影响因子引入滑坡的预测预报模型中的思路是有效可行的,而且可以明显地改善预测预报的时间尺度。     

Environmental bonds and the challenge of long-term carbon sequestration

The potential to capture carbon from industrial sources and dispose of it for the long-term, known as carbon capture and sequestration (CCS), is widely recognized as an important option to reduce atmospheric carbon dioxide emissions. Specifically, CCS has the potential to provide emissions cuts sufficient to stabilize greenhouse gas levels, while still allowing for the continued use of fossil fuels. In addition, CCS is both technologically-feasible and commercially viable compared with alternatives with the same emissions profile. Although the concept appears to be solid from a technical perspective, initial public perceptions of the technology are uncertain. Moreover, little attention has been paid to developing an understanding of the social and political institutional infrastructure necessary to implement CCS projects. In this paper we explore a particularly dicey issue--how to ensure adequate long-term monitoring and maintenance of the carbon sequestration sites. Bonding mechanisms have been suggested as a potential mechanism to reduce these problems (where bonding refers to financial instruments used to ensure regulatory or contractual commitments). Such mechanisms have been successfully applied in a number of settings (e.g., to ensure court appearances, completion of construction projects, and payment of taxes). The paper examines the use of bonding to address environmental problems and looks at its possible application to nascent CCS projects. We also present evidence on the use of bonding for other projects involving deep underground injection of materials for the purpose of long-term storage or disposal.     

谈便携式风力灭火机的使用与保养

阐述了便携式风力灭火机的使用方法、二冲程汽油机所用混合油的配制、换气阀的检查、启动和停止便携式风力灭火机的注意事项、新机磨合的方法,以及使用后和防火期结束后的保养方法等。     

电梯门机智能维护系统的研究进展

探讨了研发电梯门机智能维护系统的必要性和实际意义,介绍国外在门机智能维护领域的研究进展,从理论和技术方面论述该系统的整体流程和涉及到的重要模块和硬件平台,最后指出电梯门机智能维护系统主要的研究方向并建议国内学者对该系统进行更深入的研究。     

基于深度学习和物联网技术的智慧污水管控系统

在智慧城市建设中,水资源的智慧化管理是其不可或缺的一环,智慧水务对促进城市的长期健康发展意义重大.以青岛市某精细化工厂为例,将人工智能技术与物联网技术相结合并运用于该化工厂智慧污水管控系统中,通过一系列传感器采集动态数据,实现对水质质量的实时监测.该智慧污水管控系统应用深度学习中的长短期记忆(Long Short-Te...     

污水处理场日常检维修作业的HSE管理

对污水处理场日常检维修项目进行分类，分析不同类型检维修作业工作危害，将不同类型的HSE施工作业指导书结合到进装置作业施工作业票的签批中，规范执行风险评价过程，并落实风险削减措施，以深化日常小型检维修作业的HSE管理。     

城市煤气网管系统的安全维护及运行

煤气作为一种二次能源,是城市中使用的主要能源之一.燃气行业的生产、输送、使用过程,从某种角度来讲是高危的作业过程.煤气网管系统的施工和维护过程中充满了种种困难和危险,造成了许多重大损失,其主要原因是缺乏有效的组织引导和规范的安全措施.本文着重分析了煤气网管系统发生泄露事故的原因,提出了煤气网管系统的运行和维护过程中应当遵循的安全事项和采取的安全措施,为煤气网管系统的运行和维护工作提供了理论依据.     

Prediction of potential areas of species distributions based on presence-only data

We introduce a methodology to infer zones of high potential for the habitat of a species, useful for management of biodiversity, conservation, biogeography, ecology, or sustainable use. Inference is based on a set of sites where the presence of the species has been reported. Each site is associated with covariate values, measured on discrete scales. We compute the predictive probability that the species is present at each node of a regular grid. Possible spatial bias for sites of presence is accounted for. Since the resulting posterior distribution does not have a closed form, a Markov chain Monte Carlo (MCMC) algorithm is implemented. However, we also describe an approximation to the posterior distribution, which avoids MCMC. Relevant features of the approach are that specific notions of data acquisition such as sampling intensity and detectability are accounted for, and that available a priori information regarding areas of distribution of the species is incorporated in a clear-cut way. These concepts, arising in the presence-only context, are not addressed in alternative methods. We also consider an uncertainty map, which measures the variability for the predictive probability at each node on the grid. A simulation study is carried out to test and compare our approach with other standard methods. Two case studies are also presented.     

人工湿地处理系统的运行管理与维护

人工湿地作为一种新型的处理技术，在水环境保护中具有重要的意义和广阔的应用前最。随着人工湿地处理工程数量的增多，迫切地需要建立科学的管理制度和维护方法，以充分发挥其美化水环境和提升人文环境的双重作用。本文对人工湿地处理系统中水位控制、进出水装置维护、护堤维护、植物管理、气味控制、蚊蝇控制和野生动物管理等方面进行了分析探讨，系统论述了人工湿地处理系统在运行管理和维护中需要考虑的主要事项。对将来建立完善的人工湿地处理系统的管理体系具有一定的借鉴意义。     

广州市I/M计划升级及其在机动车NOx减排中的效果

以广州市为例,系统地讨论了机动车污染控制中的检查维护计划(I/M)。评估了广州市现行的I/M计划的实施情况及存在的问题,针对广州市NO_x污染控制目标,提出了广州市I/M计划升级的技术考虑,并对建议的两种加载I/M计划ASM和IM240进行了初步的费用效果分析。