志丹地区长6河道体系分析及油藏富集规律

志丹地区是陕北斜坡带主要的油气富集地区之一。通过对长6油层组的研究发现河道砂体沉积是影响储层的主要因素。因此本文针对长6河道体系的分析以及油藏富集规律的研究,对河道砂体的展布、油藏的富集有了一定的认识,有利于指导下一步井位部署和有利目标优选工作。     

氯碱离子膜的水传递和水通量

水传递对氯碱离子膜的电化学性能有重要的影响,而膜内水传递过程是电解过程的重要环节。在计算氯碱装置的宏观水通量的基础上,讨论了水传递现象对氯碱离子膜的电化学性能的影响,提出膜的离子透过性赋予膜以电导性,而离子的水传递数决定了氯碱膜的水通量大小。简要介绍了国产氯碱离子膜的基本结构和应用进展,展望了氯碱膜的发展前景。     

Ausbau des Stichkanals nach Salzgitter von SKS‐km 3,550 bis 14,918

Expansion of the branch channel to Salzgitter from SKS‐km 3,550 to 14,918 The branch channel to Salzgitter will be extended to the waterway category Vb in the next years. This will enable inland waterway vessels with a width of 11,45 m and a loaded draft of 2,80 m to run it without limitations. The reaches Wedtlenstedt and Üfingen will be extended in most areas to a trapezoidal cross section with a width at water level of 36,90 m and a water depth of 4,00 m. The exit basins of the locks will be extended on one side. Overall about 1 000 000 m² of soil will be moved. About 300 000 m² of clay sealing and 460 000 m² of rip‐rap will be installed. Three culverts have to be replaced by new constructions to adapt to the new cross section of the channel. In addition two bridges will be modified to allow for a clearance of 5,25 m. At present the plan approval procedure is carried out. It is expected to achieve the plan approval order in 2017. The construction is planned to start in 2018. Completion is scheduled for 2024.     

Caveolin-1 Limits the Contribution of BKCa Channel to MCF-7 Breast Cancer Cell Proliferation and Invasion

Increasing evidence suggests that caveolin-1 and large conductance Ca²⁺-activated potassium (BKCa) channels are implicated in the carcinogenesis processes, including cell proliferation and invasion. These two proteins have been proven to interact with each other in vascular endothelial and smooth muscle cells and modulate vascular contractility. In this study, we investigated the probable interaction between caveolin-1 and BKCa in MCF-7 breast cancer cells. We identified that caveolin-1 and BKCa were co-localized and could be reciprocally co-immunoprecipitated in human breast cancer MCF-7 cells. siRNA mediated caveolin-1 knockdown resulted in activation and increased surface expression of BKCa channel, and subsequently promoted the proliferation and invasiveness of breast cancer cells. These effects were attenuated in the presence of BKCa-siRNA. Conversely, up-regulated caveolin-1 suppressed function and surface expression of BKCa channel and exerted negative effects on breast cancer cell proliferation and invasion. Similarly, these opposing effects were abrogated by BKCa up-regulation. Collectively, our findings suggest that BKCa is a critical target for suppression by caveolin-1 in suppressing proliferation and invasion of breast cancer cells. The functional complex of caveolin-1 and BKCa in the membrane microdomain may be served as a potential therapeutic target in breast cancer.     

尼龙绝缘轨距块产品翘曲变形影响因素及其解决办法

以铁路扣件系统中尼龙绝缘轨矩块产品为对象,从配方组成、模具浇口设计及注射成型过程中各项工艺参数如注塑速率、注塑压力、保压压力、保压时间等方面研究了其翘曲变形的成因,并提出了保持尼龙绝缘轨距块尺寸稳定的解决方法。研究发现,在聚烯烃弹性体接枝马来酸酐(POE-g-MAH)添加量为1.5份时最适合,轨距块角度合格,产品不变形;降低注塑速度和采用多级注塑,能够改善产品翘曲变形情况,同时减少产品表面的喷射纹;增大浇口可减小轨距块翘曲变形。     

Q345/316L异种钢焊接残余应力与变形数值模拟

文中基于SYSWELD有限元分析软件对Q345/316L异种钢焊接过程的瞬态温度分布、残余应力及变形进行了数值模拟,并通过试验对其模拟结果进行了验证. 试验测量结果与数值模拟结果吻合良好,证明了利用SYSWELD模拟异种钢焊接的可靠性. 结果表明,异种钢焊接温度场呈不对称分布,Q345侧的高温区域范围更大. 不论是横向残余应力还是纵向残余应力,沿焊缝方向均呈帽状分布且在焊缝中部位置存在最大残余应力;在垂直于焊缝中央截面上,纵向残余应力与横向残余应力在焊缝和焊缝附近区域分布是不连续的,存在较大的应力梯度且应力状态也较复杂,而最大残余应力出现在Q345侧的熔合线处. 不同的热输入下模拟结果表明,在保证焊接接头质量的前提下,最好采用小热输入的焊接工艺.     

Trees and wood: working with natural river processes

A history of land clearance and riparian tree and wood management has resulted in limited riparian woodland and wood along British rivers. However, river management approaches are now being promoted that ‘work with natural processes’ to reduce flood risk through measures intended to restore, protect and emulate the natural function of catchments, rivers, estuaries and coasts. Wood has started to be reintroduced into river channels during river restoration and natural flood management activities, but this needs to be undertaken using appropriate quantities, locations and designs that mimic natural tree‐wood features. This paper reviews the knowledge that is needed to support wood reintroduction activities including (i) the characteristics of the riparian tree species and wood that are present; (ii) the importance of river size relative to that of trees and wood pieces; and (iii) the way trees, wood and geomorphic processes interact across rivers and floodplains of different energy and style.     

某屋架下弦屈曲的检测分析

某在建厂房因柱基位移导致屋架下弦屈曲,通过现场检测和结构计算,分析结构变形的原因,提出结构处理方案.     

大体积混凝土裂缝的预防

对大体积混凝土裂缝的产生原因作了分析，并从合理选择配合比、混凝土的浇筑等方面提出了防止裂缝产生的主要措施，对提高混凝土施工质量具有指导作用。     

北江大堤石角堤段渗漏探测分析

从北江大堤石角段的地质环境条件出发 ,根据同位素示踪和天然示踪 (包括水文地球化学条件 )的实际资料综合分析论证了石角段的基岩渗漏 ,认为石角段历年发生的渗透变形主要源于基岩集中渗漏通道 ,并通过连通试验证实。目前存在两条集中渗漏通道 ,并仍处于进一步的发展过程中。