构式语法理论中的部分能产性问题研究

本文通过对认知构式语法中部分能产性概念的解读,分析了决定构式部分能产性的主要因素。构式的部分能产性是建立在范畴属性归纳的基础上的,统计优选作为间接负面证据提供了构式能产的客观依据,可进入某个特定构式的新成员必须具有可激活的语义因子,涉及构式的强制性制约,包括构式准入与构式赋义两个方面。     

工程价款优先受偿权保障债权范围研究

工程价款优先受偿权的理论基础是增值理论与特定的产业保护政策。对工程建设有益的债权应纳入保障范围,拟采工程全部发生款说,包括工程建设的利润、违约赔偿金和损害赔偿金,但这种排他性权利会对第三人权利的实现构成威胁,应限制在合理的范围内,以达至优先权人和第三人利益的平衡。     

建设工程危险源的类型和产生机理研究

基于问卷调查结果的细致总结和研究,结合项目施工实践,有针对性地展开施工项目危险源类型和产生机理研究,对建设工程中存在的各种可能的危险进行研究总结,力求做到进行事前控制和主动控制.     

Analysing decadal land use/cover dynamics of the Lake Basaka catchment (Main Ethiopian Rift) using LANDSAT imagery and GIS

Development of accurate classification methods for rapidly changing catchments like that of Lake Basaka is fundamental to better understanding the catchment dynamics, which were not addressed in previous studies. Thus, the aim of this study was to map the decadal land use/cover (LUC) regimes of the Lake Basaka catchment, utilizing time series of LANDSAT images and to analyse the changes that occurred at different time periods. Both unsupervised and supervised image classification systems were utilized in Earth Resources Data Analysis System (ERDAS) Imagine (9.1). Appropriate pre‐ and postprocessing also was utilized. Seven major LUC classes were identified in the final land cover maps produced after the supervised (maximum likelihood) classification exercise. The analysis results indicated the Lake Basaka catchment had experienced a drastic change in its LUC conditions over the last 4–5 decades because of rapid increases in human settlement, deforestation, establishment of irrigation schemes and Awash National Park (ANP). Approximately 18 924 ha of forest and 4730 ha of grazing lands were devastated between 1973 and 2008. At the same time, there was a shift in land cover from forests/woodlands to open woodlands, shrub and grazing lands. The land cover classifications generally were achieved at a very high overall accuracy (84.34%) and overall kappa statistics (0.802), substantiating the value of using the classified LUC in this study as an input to hydrological models. This study results provide an opportunity to better understand and quantify the hydrological response regimes of the lake catchment from the perspective of changing LUC conditions during different hydrological periods and the resulting dynamics of the lake water balance.     

提高围垦工程施工阶段跟踪审价质量的措施探讨

围垦工程均建设在滩涂软基上,不同于一般的建筑工程,其跟踪审价具有特殊性.结合浙江省几个围垦工程施工阶段跟踪审价的工作实践,总结出几条提高围垦工程施工阶段跟踪审价质量的措施,供参考.     

水利水电工程工地试验室的建设与管理

结合新疆吉林台一级水电站大坝工程工地试验室建设管理的实践,总结阐述了水利水电工程工地试验室建设管理的一般程式和要求,归纳列举了工地试验管理中一些带有普遍性的常见问题及处理方法,供交流探讨.     

浅析除险加固高压旋喷灌浆质量问题与对策

通过对高压旋喷灌浆施工技术的特点、流程及施工质量控制、工艺要求等进行探讨,对高压旋喷灌浆施工质量问题进行分析并提出相应对策;为确保工程质量,高压旋喷灌浆应严格按照技术要求进行操作,重点对水压、水量、气量、浆液密度、进浆量、提升速度、回浆密度进行控制。通过具体项目实施,结果表明:高压旋喷注浆施工质量问题通过采取措施是能有效控制的,高喷灌浆对坝体防渗堵漏效果好,对类似的坝体防渗加固工程具有借鉴作用。     

达克曲克水电站溢洪道空化空蚀问题研究

国内首个成功运用通气减蚀措施避免泄水建筑物空蚀的工程是冯家山水库.与冯家山大坝一样,达克曲克水电站属中坝工程,最大坝高62.6m,有必要讨论表孔溢洪道泄槽空化空蚀问题.采用时启燧等提出的掺气挑坎临界坎高的经典算法以及空化空蚀相关规范,通过理论计算与实际分析表明:①在溢洪道泄槽段无需设置掺气挑坎;②在没有掺气减蚀措施的情况下,计算施工不平整度按要求控制可以有效避免空化空蚀.     

顶管法在某电厂引水工程中的应用

主要介绍了华电芜湖电厂一期(2×660 MW)工程采用顶管法施工的引水钢管设计、施工方案、施工设备选型等,可供类似工程设计和施工时参考。     

双乳山水库左岸帷幕灌浆试验成果分析

帷幕灌浆试验是帷幕灌浆施工的重要依据,文中结合双乳山左岸帷幕灌浆试验,介绍了灌浆试验的施工方法,通过10个灌浆孔的透水率、单位注入量和1个检查孔的压水试验对灌浆试验结果进行了分析.