基于本体的监测组态知识表示研究     

刘坚  许楚銮  于德介  郭建文 《湖南农业大学学报(自然科学版)》2009,36(5)

为重用监测组态领域内已有知识，实现快速有效地开发监测组态系统，提出了一种基于本体的监测组态知识表示方法．该方法通过对监测组态知识的分类分析，构建基于本体的监测组态知识三层框架结构．在最低层定义一个公共的组态元模型，通过重用或继承元模型的类或关系，建立监测系统的组态知识模型，实现监测组态系统模型知识的重用．以压缩机监测系统组态为例，通过执行JESS规则引擎获得该监测系统的一个组态解决方案，验证了本文方法的可行性．  相似文献   

Experimental Investigation of Biofouling Mechanism of RO Membrane for Wastewater Advanced Reuse     

Yu Haiqin  Sun Huide  Chen Rui  Yang Chengyong  Zhou Yukun 《保鲜与加工》2013,(1):128-134

Biofouling has become the focus of RO in water and wastewater treatment. Experimental investigation of RO biofouling mechanism and characteristics in wastewater advanced reuse was carried out by static test and cross-flow dynamic test on a lab-scale membrane fouling simulator(MFS).The experimental results show that the major contributors to biofouling are coli and filamentous bacteria; there usually is no biofouling on the RO membrane surface with the absence of microbial source and nutrient composition; it is easy to cause biofouling on the fouled membrane; the germicidal treatment and the protection in the shut-down period are important for RO. Guidance for the analysis and reduction of biofouling in the practical engineering is provided.  相似文献   

Perception and preferred reuse of vegetated vacant lots along main streets in a shrinking city     

《Urban Forestry & Urban Greening》2023

Vacant land in cities is linked to generating insecurity and urban decline. However, vegetated vacant lots offer easy opportunities for reuse and have ecological, economic, and social potential. Four medium-sized vacant lots (0,7–1,5 ha) with spontaneous vegetation located along main streets in Ostrava (Czechia) have been purposefully selected for this study. Structured interviews (n = 383) were collected to assess the perception of passers-by and their reuse preferences for these lots. Structural equation models were then performed to test the effect of sociodemographic variables. This paper aims to evaluate whether vegetated vacant lots in a historic urban fabric are perceived as an asset or liability by visitors and to assess the prospects for a publicly-accepted reuse of such spaces in a shrinking Central European city. Results indicate that the selected lots are perceived ambivalently. Older visitors show a more positive perception of the vacant lots, while no significant gender differences were identified. Educated respondents visited the vegetated vacant lots less often and perceived them more negatively compared to their less educated counterparts. Policy implications are provided in the end.  相似文献   

科研事业单位科研项目存量资金盘活研究          下载免费PDF全文

王化柱  许彦阳 《农业科研经济管理》2023,(1):1-3

“放管服”背景下，科研事业单位科研项目经费存量资金累积的情况不断加大，如何在经费管理工作中落实新政策要求、盘活科研事业单位的存量资金、促进科研工作稳定持续发展，是科研事业单位面临的重要问题。文章通过分析科研事业单位存量资金形成的原因、盘活存量资金的意义以及当下面临的问题，提出了存量资金盘活的对策建议，以期为科研事业单位有效盘活存量资金提供参考。  相似文献