有线电视网络灾备体系研究及方案建议

分析了有线电视网络灾备需求,提出了有线电视网络灾备体系,包括业务系统的灾备、运营支撑系统的灾备和传输网络的灾备,分析了广播电视安全播出与有线电视网络灾备体系的关系,从省级和国家级网络公司的角度提出了有线网络灾备架构,从实际建设的角度提出了有线电视网络灾备系统方案建议。     

唐崖土司城宫殿区遗址复原初考

宫殿区是中国古代城池中核心的部分,是最重要的建筑类型。唐崖土司城宫殿区遗址是鄂西地区土司城宫殿区遗址的典型代表,具有很高的研究价值。宫殿区原有的建筑风格既体现汉族官式建筑的特点,又融入了土家族特有的建筑形制。本文从整体平面格局、建筑单体形制特征等方面在现有的资料基础上对唐崖土司城宫殿区遗址进行了初步复原,为进一步还原其真实性提供参考依据,以期为研究土司时期建筑技术与艺术有一定的借鉴意义。     

A probabilistic approach for economic analysis of a shopping center in seismic zone

The occurrence of an earthquake causes direct and indirect losses in economy. Performance of the built environment can determine both the magnitude of the losses and the speed of recovery from earthquakes. Earthquake losses can be minimized by the use of planning techniques. This paper presents a probabilistic approach for economic evaluation of a shopping center constructed in a seismic zone. Decision-makers can benefit from this approach, before and after an earthquake occurrence, by considering the probability distribution and variability. Life cycle cost concept is taken into account in the formulation of future worth estimation. Therefore, the approach simulates all the benefits and costs, which are prone to variation within Monte Carlo framework. The probabilistic approach can be used to assess the effects of recovery periods.     

原油负压稳定轻烃收率特性研究

根据我国原油的特点,负压闪蒸稳定工艺在生产现场得到了广泛地使用。在负压闪蒸稳定过程中,轻烃收率是衡量工艺质量的一个重要指标。利用HYSYS软件模拟原油负压稳定的流程,并通过改变各种影响因素的参数值来计算具体条件下的轻烃收率,将这些数值汇总进行分析得出轻烃收率的影响规律,可以了解诸多因素对轻烃收率的影响规律并对现有负压原稳生产装置的工艺参数进行一定的优化,从而达到提高生产效率和经济效益的目的。     

多注入轮次提高等流度二元驱采收率的实验研究

针对J16块试验区实施二元驱时,存在注入液在不同渗透性地层中推进速度不均匀、驱油效果变差等问题,开展了多注入轮次提高等流度二元驱采收率的室内实验研究。结果表明:在二元体系的成分和用量相同的条件下,不同注入轮次等流度二元驱采收率不同。实验条件下,四轮次注入时化学驱采出程度最高,达到35.2%,高出一轮次7.49%。多轮次注入二元体系较单轮次注入能够更好的控制含水上升速度,长时间维持较高注入压力,更大限度增强等流度驱油效果。     

黑钨矿捕收剂的应用及其使用后水中残留物的去除

通过分析黑钨矿浮选药剂应用现状,总结近年来黑钨矿浮选捕收剂应用实践。其中含胂和膦的脂肪酸类捕收剂含有有害金属,对环境中土壤以及水有极大的污染;螯合剂使用前需预先处理,不仅增加了成本和流程复杂,同时也危害环境;组合药剂的使用提高了药剂效率,节约资源,通过减少使用对环境有污染的药剂,保护了环境。并采用PAC、PFS及其组合絮凝剂对捕收剂使用后废水进行处理,结果表明:PAC及PAC+PFS处理后废水排放达到《污水综合排放标准》(GB8978-1996)的一级标准,而PFS处理则没有达到一级标准。     

储层渗透率对天然气开采的影响研究

随着石油开采量的降低,天然气的需求量便日益增长。为了充分开采气田,需要对气田的地质参数以及地质参数对天然气开采的影响有深入的了解,以提高气田的采收率。主要研究储层渗透率对天然气开采的影响,通过前期调研和数值模拟研究发现,稳产时间和采收率跟渗透率成正比关系,渗透率越大稳产时间越长,采收率越高;此外,随着渗透率的增大,稳产时间和采收率的增幅逐渐减小。因此储层渗透率越大,其对天然气开采的影响也就越小。     

Swift trust formation in multi-national disaster project management teams

In recent years there has been growing interest in how project management theory can both inform and be informed by disaster response and recovery projects. Addressing the lack of empirical research into how trust forms within such projects, this exploratory study mobilises swift trust theory to investigate the process of trust formation within a multinational disaster project management team formed in response to tropical cyclone Winston in Fiji in 2016. In-depth content analysis of qualitative data from semi-structured interviews with disaster management team members, non-participant observation of the disaster project management teams during the disaster response and analysis of disaster management documentation appear to support the predictions of swift trust theory in relation to the importance of reputation, role and interdependence in building swift trust. However, theoretical predictions around the importance of categorical assumptions, confirmation of assumptions and the leadership role of the contractor did not appear to be supported by our data. It is concluded that while swift trust theory can potentially provide valuable practical and theoretical insights into trust formation in multinational disaster project management teams, it may need to be adapted to more accurately model trust formation in a disaster project management context.     

灰色预测模型与浮选动力学多重模型

阐述了灰色预测模型的建立过程，通过试验方式，对比分析了灰色预测模型与浮选动力学多重预测模型的实践应用效果，表明色预测模型预测的优越性。     

金银火法冶炼中炉衬废砖选矿回收金银

金银火法冶炼中炉衬废砖的金银含量高，回收价值大。研究确定了浮－重联合选矿、产品酸浸除镁的炉衬废砖处理工艺。采用组合浮选药剂，可强化浮选效果，浮选尾矿经摇床重选确保了粗粒金银的回收；精矿酸浸除镁可满足冶炼要求；尾矿脱镁后可返回铅粗炼系统综合回收金、银、铜、铋等有价金属，有效地利用了资源。工艺流程简单、合理，易于实施，应用于生产取得了良好的经济效益