走不出命运怪圈

张恨水小说《夜深沉》中的杨月容是典型的女伶悲剧形象.残酷的生存环境在把她推向人生炼狱的同时,铸就了她抗争的秉性.但抗争结果却没有摆脱沦为有闲阶级享乐工具的命运.从卖唱维生的大杂院大众情人到供有闲阶级享用的剧院明星,再到觉醒后毅然逃出堕落围城回到民间重操旧业以糊口,她像在沉沉黑夜里走了一个"鬼打墙"的怪圈.这是一个不以抗争者意志为转移的命运怪圈.杨月容最终没有走出这个怪圈,却以抗争失败后的反思与觉醒实证了女伶悲剧人生的社会必然性.     

胶囊破胶剂的介质分散分相法制备研究

针对压裂施工过程中破胶过早的问题，以过硫酸铵为芯材，选用适宜的聚合物为囊衣材料，采用分散分相法制备胶囊破胶剂。通过比较，确定了聚乙烯醇（PVA）和乙烯醋酸乙烯共聚物（EVA）为较好的囊衣材料，通过正交实验研究了两种胶囊破胶剂的制备工艺。结果表明：搅拌速率、温度、衣材与囊芯的质量比、衣材溶液和分散剂的质量分数对胶囊破胶剂性能有较大影响。制备PVA胶囊破胶剂的最佳条件为:温度25℃，搅拌速率270r/min，衣材与囊芯的质量比2:8，分散剂用量为1%；制备EVA胶囊破胶剂的最佳条件为:温度25℃，搅拌速率300r/min，衣材溶液和分散剂的用量为5%和2%。     

新型断路器自动调节锁紧装置移动框架设计

为了实现新型断路器生产过程的自动化,设计了新型断路器自动调节锁紧装置中的移动框架结构。基于三维实 体造型以有限元分析、机械优化设计等现代分析手段为支撑,通过有限元技术和虚拟样机技术分析移动框架的受力状况 和运动情况,优化设计移动框架内各个机构,最终设计制造出操作控制简便、工作平稳、使用寿命较长的移动框架。     

刀具断屑槽对刀具磨损量的影响

磨损是影响断屑效果的一个重要因素,因此在设计、推广和应用新断屑槽时必须考虑磨损的影响。本文通过理论分析和实验研究,对刀具前、后刀面磨损量与断屑槽的效果进行了深入的探讨,提出了一个新的槽形设计原则。按新原则设计的断屑槽可减少刀具磨损量,提高刀具寿命,并可得到较好的断屑效果。     

In the shadow of the coal breaker: cultural extraction and participatory communication in the Anthracite Mining Region

What stories do ruins tell? What is the legacy of the extractive coal industry? When is extraction complete in a single-industry area? Tied to global capital, fuelling the Industrial Revolution on the labour immigrants, the legacy of extraction in the Anthracite Coal-Mining Region in Northeastern Pennsylvania extends into local notions of heritage, memory, community welfare, and place. Tracking (de)industrial life scenes in the Anthracite Coal-Mining Region, this ethnographic work follows traces of the past as they emerge and the day-to-day practices that sustained them noting intensities and flashpoints as they arise in daily life. As a particular flashpoint, Coal Region residents processed the demolition of the ruins of Saint Nicholas Coal Breaker, the last anthracite coal breaker built before 1960 and once the largest coal breaker in the world. Residents rapidly produced and shared digital media of the Breaker with and through a large public digital humanities collaboratory that I created and maintain through an active Facebook page (https://www.facebook.com/AnthraciteCoalRegion) of more than 8000 members and a corresponding website (http://anthracitecoalregion.com). Engaging in community dialogue, participatory communication, and offering critical interpretations, residents wrote accounts about the demolition of the Breaker including its historical and mnemonic relevance, the cultural politics surrounding it, and the ethical dimensions of its extraction from the landscape by a mining company engaged in strip-mining on the surrounding land. These connections and dislocations between situated pasts show affective intensities arising suddenly even though dominant or more official narratives may have overwhelmed them. The sanitizing of the landscape of Saint Nicholas Breaker tries to empty the physical place of the material cultural traces of mining people/mined people to re-extract more coal through strip-mining operations, thereby rendering superfluous the underground miners’ labour by removing the last sign of it - the Breaker - from the landscape.     

用于压裂液的胶囊破胶剂性能评价

胶囊破胶剂是近年发展起来的一种新型破胶技术。它是以一种或多种常用的破胶剂为囊心,表面裹上一层防水的囊衣材料而形成的微小胶囊,具有延缓释放破胶剂的特点,在压裂作业中可高浓度使用而不影响其它流变性能。简述了胶囊破胶剂技术的现状、类别、特点,并选用国内外的部分胶囊破胶剂样品进行了室内性能评价实验。