方中空夹层钢管混凝土柱火灾后剩余轴压承载力

为探究影响方中空夹层钢管混凝土火灾后剩余轴压承载力的因素,利用ABAQUS有限元软件,建立方中空夹层钢管混凝土的温度场和力学场分析模型。通过建模分析,可以得出以下结论:计算长度、空心率、受火时间、钢材强度、混凝土强度、荷载偏心率是影响方中空夹层钢管混凝土火灾后剩余轴压承载力的主要因素,其影响规律为:方中空夹层钢管混凝土柱剩余承载力随计算长度、空心率、荷载偏心率、受火时间的增加而降低;随混凝土强度和钢材强度的增加而增加。在参数分析结果的基础上,给出了该类构件火灾后剩余轴压承载力的简化计算公式,该公式的精度较高,与数值程序计算结果相近,可为此类构件火灾后剩余承载力计算提供参考。     

海上油田含油污泥对污泥-聚合物混合液性能的影响

为了回注处理海上油田含油污泥,将其与聚合物溶液混合,制备聚合物驱调剖体系。系统评价了含油污泥对污泥-聚合物混合液的溶液性能、使用性能及驱油效果的影响。实验结果表明:当含油污泥浓度小于300 mg/L时,油泥颗粒的粒径范围为0.1~100μm,d_(90)为40~60μm,污泥-聚合物混合液的黏度、抗剪切及抗老化稳定性均得到增强,注入性不受显著影响,阻力系数及残余阻力系数略有增加;当采用油泥浓度为100 mg/L的污泥-聚合物混合液进行驱油实验时,聚驱采收率增幅为7.26百分比,然而含油污泥浓度的进一步升高对提高采收率并不利。     

‘Power with’ and ‘power to’ in environmental politics and the transition to sustainability

Scholars of environmental politics demand serious reform of international governance and institutions to protect planet Earth. There is therefore an urgent need to discuss what causes change and gridlock in environmental politics. Serious reform is inextricably tied up with questions of power. The diversity with which studies on environmental politics understand power is exposed through three ideal type concepts: power with (learning and cooperation), power to (resistance and empowerment) and power over (coercion and manipulation). So far, scholars have mainly used analysis of coercive power (over) to explain gridlock in environmental politics; also needed is explicit acknowledgement of coaction and individual agency that can enable transition to more sustainable societies.     

酸化-萃取法处理丁辛醇废水

采用酸化-萃取法处理齐鲁石化公司第二化肥厂的丁辛醇废水（简称废水）,用硫酸调节废水的pH,以该厂产品异辛醇为萃取剂,考察了各种因素对萃取效率的影响,得出较佳工艺条件：废水的pH为2．5,废水与萃取剂的体积比为4,废水温度为10℃,废水与萃取剂混合时的振摇时间为60s,萃取相和萃余相的静置分离时间为10min。在该条件下对COD为42244mg/L的废水进行二级错流萃取,COD去除率为86．82％。该法可实现对废水进行处理和资源回收的双重目的。     

转变教育观念,明确培养目标,培养高素质应用型人才——在全院第三次教学工作会议上的讲话

我院由从事高等教育向从事高等职业教育转移,首先要转变观念,以社会需求为导向,以提高教育质量为核心,以培养高技能实用型人才为根本,凸显环境教育特色,注重素质教育,创建示范性专业,加强精品课建设和实践教学体系的建设,争创示范性高职高专院校.     

光辐照TiO2层柱粘土处理有机废水的研究

主要介绍了TiO2层柱粘土的制备方法,及用光辐照TiO2层柱粘土处理有机废水的机理、影响因素和提高TiO2层柱粘土光催化剂活性的途径;介绍了TiO2层柱粘土光催化剂的失活和再生.认为用光辐照TiO2层柱粘土处理有机废水是一种无污染而有效的方法,能有效解决目前废水处理过程中存在的许多问题.     

蒽醌废水生化处理的活性污泥驯化

通过比较不同的污泥驯化方法研究了活性污泥法处理蒽醌废水的可行性.结果表明,常规的CODCr负荷提升法需要50 d才可以驯化出活性污泥.在进水中添加1 g/L葡萄糖可以快速提高污泥浓度,但是驯化出的污泥活性很低,不能满足废水的处理要求.最好的方法是添加1 g/L葡萄糖和原废水交叉循环驯化法,第28天就可以驯化出高活性的污泥.在平均进水CODCr为1 050 mg/L、HRT为24 h的条件下,CODCr去除率达到95.6%.     

Reducing non-point source pollution with enhancing infiltration

The rainfall system was set up on a slope land, which was used with some materials to enhance soil infiltration. The results showed that it was effective to enhance the infiltration of rainwater in soil and reduce the pollutants of surface runoff. After the soil meliorated by the lignin polymer and zeolite, runoff was delayed about 10 min and reduced by 44.40%--50.00%, synchronously, the pollutant loads, such as total suspended solids （TSS）, chemical oxygen demand by ditromate （CODCr）, total nitroger （TN） and total phosphorus （TP）, were reduced on averages by 44.58%, 37.80%, 51.62% and 44.11%, respectively. It is an available technique to control the pollution of non-point source from sources.     

喷水冷却对混凝土受热痕迹显微结构的影响

模拟火灾现场喷水灭火的情况条件,将高温下的混凝土喷水冷却,用扫描电子显微镜（SEM）分析混凝土的显微结构。研究发现,当受热温度低于300℃时,喷水冷却混凝土的显微结构与空气中自然冷却试样没有明显的差别。当受热温度达到300℃以后,冷却过程中的水会在混凝土中产生新的水化物,显微结构中发现有新的晶体。受热温度越高,新的水化物晶体就越多,同时混凝土的显微结构破坏越严重。这些特征可以用来鉴定火场中遏水冷却混凝土的受热温度。     

A spatial-temporal system for dynamic cadastral management

A practical spatio-temporal database (STDB) technique for dynamic urban land management is presented. One of the STDB models, the expanded model of Base State with Amendments (BSA), is selected as the basis for developing the dynamic cadastral management technique. Two approaches, the Section Fast Indexing (SFI) and the Storage Factors of Variable Granularity (SFVG), are used to improve the efficiency of the BSA model. Both spatial graphic data and attribute data, through a succinct engine, are stored in standard relational database management systems (RDBMS) for the actual implementation of the BSA model. The spatio-temporal database is divided into three interdependent sub-databases: present DB, history DB and the procedures-tracing DB. The efficiency of database operation is improved by the database connection in the bottom layer of the Microsoft SQL Server. The spatio-temporal system can be provided at a low-cost while satisfying the basic needs of urban land management in China. The approaches presented in this paper may also be of significance to countries where land patterns change frequently or to agencies where financial resources are limited.