洱海水硫化物及六价铬含量的检测分析

目的:了解洱海水硫化物及六价铬含量。方法:采集洱海20个点的水样对硫化物及六价铬的含量进行检测,分别采用亚甲蓝分光光度法,二苯碳酰二肼分光光度法进行测定。结果按照《地表水环境质量标准进行评价》。结果:硫化物、六价铬合格率为100%。结论:硫化物、六价铬均达到GB 3838-2002《地表水环境质量标准》的一类水质。     

生态伦理学视阈下的大理白族传统水文化

白族传统水文化中蕴含着丰富的生态伦理思想,在历史上对人与水的和谐关系之建构起过重要的作用。从物象、制度行为、精神三个层面对白族传统水文化所蕴含的生态伦理思想进行分析,可以为解决水危机,促进生态文明建设提供一定的借鉴作用。     

一类蒸汽发生器水位控制系统的分段耗散控制

基于压水堆蒸汽发生器水位的线性变参数模型,应用耗散控制理论,设计了综合和正实性能指标的状态反馈耗散控制器。应用二次型耗散控制器存在的充分必要条件,设计了对应于一个供给率函数的分段状态反馈耗散控制器。为了提高控制性能,在状态反馈耗散控制器的基础上添加了PID控制器组成了双控制系统。仿真结果验证,所设计的两种控制器不仅能够保证闭环系统的渐进稳定,并且能够满足一定的性能指标,双控制系统与串级PID控制系统相比具有更好的控制性能。     

衡水湖水文化简论

水是源,文化是魂.衡水湖作为京南第一湖,国家级自然保护区和水利风景区,水文化十分丰富,既有水工程、水环境、水景观等物质形态的水文化,又包含水哲学、水法规、水文艺、治水理论和水著作等精神形态的水文化.     

新安煤矿16煤导水裂隙带高度研究

结合新安煤矿开采技术和水文地质条件,以岩石力学实验资料为基础,分别采用"三下开采规程"法、类比法、经验公式法和数值模拟法对新安煤矿16煤开采导水裂隙带高度进行综合对比研究。计算结果表明:数值模拟法可对裂隙带发育高度直观显示,并和最终确定的导水裂隙带高度一致;综合确定新安煤矿16煤的最大导水裂隙带高度为30m,防水煤柱高度35.5m,为确定16煤合理开采上限提供理论依据。     

搭建多学科共享实验平台 促进协同创新发展

论述了高校建立多学科共享实验平台的重要意义,分析了影响平台建设的主要因素,介绍了大连海洋大学在新校区规划过程中,理顺管理机制,强化统筹,充分利用学科专业优势,以大学科和共享实验技术为出发点,规划建设多学科共享实验平台所进行的尝试和探索。     

高职院校信息化建设路径探究

通过对濮阳职业技术学院信息化建设基础的介绍,提出了整体规划、分步实施、协调发展的建设思路,制定了进行信息基础平台、教学资源平台、管理信息平台、信息集成平台的建设规划,并在组织、制度、技术、经费等方面采取了保障性措施。该信息化校园建设路径的探索性实施,对高职院校信息化建设具有重要的借鉴作用。     

Monitoring and analysis of shock wave in water for underwater drilling blasting

Taking the underwater reef blasting in Gulei sea channel of Xiamen Port as an example, the forming characteristic of shock wave in water for underwater drilling blasting is analyzed. By field monitoring, the pres- sure of shock wave in water for different distances is attained; the major parameters such as pressure amplitude and positive action time, and the propagation attenuation rule of shock wave in water are analyzed in this paper. The results can be helpful for engineering design and construction and environmental safety assessment.     

Development of emergency water quality standard for Cr6+ and Hg2+ in Liao River basin

The acute toxicity data of Cr＋ and Hg2＋ to the aquatic organisms in Liao River basin was collected and screened. Calculated results of criteria values using popular species sensitivity distribution （SSD） methods were evaluated through data analysis. The comprehensive methodology of emergency water quality standards （EWQSs） was established on the basis of the SSD method of Australia and New Zealand according to the evalu- ation results. The affected fractions of the aquatic organisms were set to be 5 %, 15 %, 30 % and 50 %, corre- sponding to the risk grades of Ⅰ,Ⅱ,Ⅲ and IV, and four-grade EWQSs, respectively. The EWQSs for Cr6＋ and Hg2. in the Liao River were derived and the corresponding risk indicators were also proposed. The results showed that the four-grade EWQSs for Cr6＋ were 2.85 μg/L, 21.0 μg/L, 161 μg/L and 797 μ/L, respec- tively, and the risk indicators were daphnia （grade Ⅱ ）, shrimp （grade Ⅲ）, and the bighead fish or tadpole （grade IV）. The four-grade EWQSs for Hg2＋ were 0.59 μg/L, 2.32 μg/L, 6.25 μg/L and 15.6 μg/L, respective- ly, and the risk indicators were crucian carp or daphnia （grade Ⅱ）, shrimp （grade Ⅲ）, and worm or crab （grade IV）. The results provided valuable information for the risk analysis of sudden ambient water environmen- tal pollution accident.     

M地区水淹层含水饱和度的计算

以M地区测井、实验、试油等资料为研究基础,采用电阻率相对值技术,建立含水饱和度解释模型,避开了地层混合液电阻率的求取.探讨了研究区两种含水饱和度计算方法的应用过程,计算结果表明电阻率相对值法计算的含水饱和度与岩心分析饱和度匹配较好.实际应用表明,该模型效果良好,为M地区饱和度计算提供了一种行之有效的方法.