P／MCs新型复合材料制备、结构及阻尼性能

采用特殊的渗流法所制备的新型Ｐ／ＭＣｓ复合材料，由高分子聚合物与蜂窝状铝架组成，它具有优异的阻尼性能，并简述了结构对阻尼的影响     

Prediction of evaporation heat transfer coefficient and pressure drop of refrigerant mixtures

A study on the prediction of heat transfer coefficient (HTC) and pressure drop of refrigerant mixtures is reported. HTCs and pressure drops of prospective mixtures to replace R12 and R22 are predicted on the same cooling capacity basis. Results indicate that nucleate boiling is suppressed at qualities greater than 20.0% for all mixtures and evaporation becomes the main heat transfer mechanism. For the same capacity, some mixtures containing R32 and R152a show 8.0–10.0% increase in HTCs. Some mixtures with large volatility difference exhibit as much as 55.0% reduction compared with R12 and R22, caused by mass transfer resistance and property degradation due to mixing (32.0%) and reduced mass flow rates (23.0%). Other mixtures with moderate volatility difference exhibit 20.0–30.0% degradation due mainly to reduced mass flow rates. The overall impact of heat transfer degradation, however, is insignificant if major heat transfer resistance exists in the heat transfer fluid side (air system). If the resistance in the heat transfer fluid side is of the same order of magnitude as that on the refrigerant side (water system), considerable reduction in overall HTC of up to 20% is expected. A study of the effect of uncertainties in transport properties on heat transfer shows that transport properties of liquid affect heat transfer more than other properties. Uncertainty of 10.0% in transport properties causes a change of less than 6% in heat transfer prediction.     

引进型国产300MW汽轮机窜轴事故分析及防止对策

通过引进型国产300MW汽轮机在启动试运中出现的一次窜轴事故,根据计算机追忆打印的有关图表、数据分析了产生事故的原因,并提出了为防止类似事故重演应采取的措施和建议。经采取措施后该机组多次又在相同情况下启机,已安全运行。说明分析正确,措施得当,值得同类型机组借鉴。     

PTA酸化沉淀池的腐蚀及其研究

阐述了ＰＴＡ酸化沉淀池的腐蚀状况、防腐材料的选材试验及防腐措施的研究及其使用效果；分析了Ｍ树脂玻璃钢的应用技术；提出了ＰＴＡ酸化沉淀池采用复合玻璃钢的防腐措施。     

Hydrogen incorporation in Ni–P films prepared by electroless deposition

Electroless NiP films, with 12 to 16 wt % P, were deposited from a moderately acid solution. Thermogravimetric analysis indicates the presence of occluded hydrogen in the layers, which desorbs upon heating. The amount of incorporated hydrogen decreases when the pH of the solution or the nickel sulfate concentration is increased; by contrast it increases with hypophosphite concentration. Cyclic voltammetry, using an electrochemical quartz crystal microbalance, confirms the existence of parasitic reactions, namely the reduction of protons of the solvent during the cathodic process and oxidation of hydrogen during the dissolution of the layers. This behaviour is in qualitative agreement with the proposed reaction scheme.     

Multi‐layered flat‐surface micro‐optical components directly molded on an LCD panel

Abstract— We have developed a process to fabricate optical components, such as a lens, prism, or diffuser, directly on to a glass substrate. Processes include precision mastering by diamond cutting and multi‐layer photopolymer (2P) molding to realize flat surfaces and the integration of multiple components with an alignment within a few micrometers.     

高压高产井电子压力计直读试井应注意的几个问题

在高压高产井电子压力计直读试井中，推荐选用石英作为压力传感器的压力计，附加适量的加重杆，保证压力计顺利入井，并平稳工作；同时选用可靠的井口防喷系统。     

Brandschutz; subjektiv-?ffentliche Nachbarrechte

Nachbarn kommt kein Mitspracherecht dahingehend zu, dass die Zufahrt für Einsatzfahrzeuge der Feuerwehr gew?hrleistet sein müsste.     

XDGAM、P2 HD的性能测试对比

通过XDCAM、P2HD在大洋D^3-edit、D^3-edit HD、苹果非编上的测试，分析各自的特点，总结出相应的工作流程，为下一步的设备选型和应用打下基础。     

生产尾管固井技术优化及其在渤中25-1油田中深丛式井的应用

渤中25-1油田沙河街组油藏属于中深层高温高压油藏,制约了常规尾管固井技术的应用。对生产尾管固井技术进行了优化,解决了中深丛式井生产尾管固井作业安全、质量与时效之间的矛盾,实现了非钻机时间候凝和电测固井质量,显著提高了钻井作业时效。该项技术成果对于渤海中深层油田的开发具有重要意义。