MBR工艺处理聚酯废水的运行管理要点

介绍了厌氧-MBR-氧化塘联合工艺用于聚酯废水处理的工艺流程和处理效果。重点探讨了工艺过程中主要构筑物的运行、控制要点。介绍了MBR池在运行管理中常见的故障,进行了原因分析,并给出排除的方法。采用该法处理聚酯废水,提高了活性污泥浓度,极大地改善了聚酯废水处理中好氧过程的效率,具有良好的经济技术可行性,处理效果持续稳定。     

Assessment and Mechanism Investigation of Selective Flocculation Process for Ultrafine Chromite Particle

During beneficiation of low-grade chromite ore, huge amounts of ultrafine tailings are generated and contain substantial metal values which need to be recovered. Selective flocculation technique is one of the processes for beneficiation of ultrafine particles. Here an attempt was made to establish selective flocculation process by using two types of synthetic mixtures. In addition to this, selective flocculation was also attempted on natural tailings. It was found that it is possible to enrich the chromite value using the selective flocculation process. The selectivity of the wheat starch to the chromite mineral was also investigated using image analysis, FTIR analysis, and zeta potential analysis.     

Modified gain intervention filter based dehazing technique

Haze reduces the visibility of outdoor images. The majority of existing dehazing techniques perform poorly whenever objects are similar to airlight, and no shadow is cast on them. Also, existing approaches still suffer from the problems of colour distortion, edge preservation, and halo artefacts. To solve these issues, a modified gain coefficient filter based Dark channel prior (DCP) for single image dehazing is proposed. To reduce the colour distortion, restoration model of DCP is also redefined. The experimental results indicate that the proposed technique provides better results as compared with existing approaches.     

降解瓜胶与降解黄原胶的协同凝胶化及其流变性研究

首次用降解瓜胶与降解黄原胶在一定条件下共混,形成凝胶体系。考察了总胶浓度、氯化钾浓度、制备温度、放置时间、苯甲酸钠及降解食品多糖的分子量等因素对共混凝胶体系黏度的影响,并对其流变特性进行研究。结果表明,降解瓜胶与降解黄原胶可以形成凝胶体系,该体系具有显著的黏弹性和触变性。     

一株聚丙烯酰胺降解菌株的分离培养及其系统发育分析

应用Hungate厌氧技术，从大庆油田聚合物配注站的母液罐中分离到一株水溶性超高分子量聚丙烯酰胺（HPAM）的降解菌株18，该菌株为短杆状，G^-，黑色圆形菌落，最适温度为38℃，最佳pH值为7．8，具有硫酸盐还原功能，产H2S气体，兼性厌氧．研究表明，该菌株能以HPAM为唯一碳源，降解侧链，部分官能团发生改变；浓度为600mg/L时，20d菌株生物降解率为63．17％，其溶液粘度下降效果显著．16S rDNA序列与Enterobacter cloacter cloacae础（ECL251469）的相似性为98％，通过形态、生理生化、G＋C含量以及16S rDNA序列鉴定，初步鉴定可能为肠杆菌属的一个新种，暂时命名为Enterobacter HPAM Degraded Bacteria I8，I8菌株的分离为HPAM的生物降解提供了新的微生物资源，图4,参14．     

Priming Trait Inferences Through Pictures and Moving Pictures: The Impact of Open and Closed Mindsets.

A newly developed paradigm for studying spontaneous trait inferences (STI) was applied in 3 experiments. The authors primed dyadic stimulus behaviors involving a subject (S) and an object (O) person through degraded pictures or movies. An encoding task called for the verification of either a graphical feature or a semantic interpretation, which either fit or did not fit the primed behavior. Next, participants had to identify a trait word that appeared gradually behind a mask and that either matched or did not match the primed behavior. STI effects, defined as shorter identification latencies for matching than nonmatching traits, were stronger for S than for O traits, after graphical rather than semantic encoding decisions and after encoding failures. These findings can be explained by assuming that trait inferences are facilitated by open versus closed mindsets supposed to result from distracting (graphical) encoding tasks or encoding failures (involving nonfitting interpretations). (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

塔北地区原油碳同位素组成特征及影响因素

以塔里木盆地轮南地区与哈得逊地区20个原油样品的全油碳同位素组成和正构烷烃单体烃碳同位素组成分析为基础,结合油源、区域构造演化以及成藏过程的研究,探讨影响原油碳同位素特征的主要因素.研究表明,轮南地区原油的全油碳同位素组成值均大于-32‰,而哈得逊地区原油的全油碳同位素组成值一般小于-32‰;原油正构烷烃单体烃碳同位素组成也表现出轮南地区重于哈得逊地区的特征.两地区原油碳同位素组成的这种特征是由于两地区油气成藏过程的差异造成的,轮南地区原油碳同位素组成比哈得逊地区的原油碳同位素组成重的主要原因是轮南地区原油中混入了来源于寒武系的降解原油,而非二者油源不同造成.图6表2参11     

少筋混凝土剪力墙结构抗侧力破损试验的计算机模拟方法

本文是将过去仅用于弹性结构计算的连续化分析法,推广应用于弹-塑性结构计算,用以利用计算机模拟结构试验,计算出结构破坏过程,并为提高计算精度,对首层采用原型(非连续化)分析。本文方法与现有的离散化有限元法相比,具有输入数据简单,运算速度快,大大节省计算机内存与机时的优点。本文方法的要点在于采用连续化分析的同时,辅以结构已局部破损部位的刚度退化修改,再进行按同一竖列内部变形能量等效的再度刚度连续化,进入下一级荷载下的分析,并在求得整体变形后,还原到非连续化的实际刚度,进行各部位的内力分配计算,求出新一轮的破损位置。如此步步计算,直到最后阶段。     

基于复数小波的图像恢复算法研究

研究了基于复数小波的各种图像恢复算法，提出把HMT模型应用到ForWaRD的图像恢复中．利用ForWaRD算法，首先把模糊加噪的降质图像在傅立叶域中进行维纳滤波器正则反卷，然后在小波域中进行去噪处理，可以得到较好的恢复效果．对典型卷积加噪线性降质图像进行了仿真实验，并把基于复数小波的各种图像恢复算法的仿真结果同基于正交小波的图像恢复算法仿真结果作了比较，发现前者无论从客观指标还是视觉效果上都有明显的优势，尤其是基于HMT模型的复数ForWaRD图像恢复方法．     

A novel framework for the reliability modelling of repairable multistate complex mechanical systems considering propagation relationships

Due to the propagation, amplification, and concatenation in a failure process, the reliabilities of repairable multistate complex mechanical systems (RMCMSs) may be affected by a significant fluctuation due to a small exception associated with a reliability indicator. Focused on the problems arising from the lack of propagation relationships among fault modes, functional components, and failure causes in conventional reliability models, a novel framework for reliability modelling is proposed to comprehensively analyse the reliabilities of RMCMSs. First, the reliability models are abstracted as weighted and directed networks with five layers. Second, an improved failure mode and effects analysis (IFMEA) method combined with the D‐number method and VIKOR approach is presented to determine the importance of reliability nodes. Third, a cut set of the reliability model is generated by any exception of a reliability indicator by considering the propagation relationships, and the reliability sensibility index is defined to characterize the fluctuations in system reliability. The effectiveness of the proposed framework is demonstrated in an actual reliability modelling application. As an intuitive method, the proposed framework inherits the advantages of conventional models but overcomes the drawbacks of these existing methods. Therefore, this method can be flexibly and efficiently used in the reliability modelling of RMCMSs. Moreover, the approach provides a foundation for comprehensive and dynamic reliability analysis and the failure mechanism mining of RMCMSs, and it can be used in other engineering applications.