喷锚结合水泥搅拌桩在基坑支护中的应用

结合紫金苑工程实例,分析喷锚结合水泥搅拌桩在基坑支护中的应用并总结施工、监测经验。     

Contemporary approaches to certification of measurement provision software

Contemporary approaches to the certification of measurement provision software are considered in domestic and overseas publications. Normative documentation is analyzed and a scheme is proposed for certification that takes account of the features of programs used for metrological purposes. __________ Translated from Izmeritel’naya Tekhnika, No. 5, pp. 65–68, May, 2007.     

结构粘结剂的试验研究

粘结剂是粘钢加固技术的关键材料,通过对粘结剂的试验研究,得到了粘结剂的拉压试验曲线与材料力学指标以及粘附于各种标号混凝土时,粘结层的抗剪强度;并且还进行了粘结剂的短期流变试验。     

Yttrium sol–gel coating effects on the cyclic oxidation behaviour of 304 stainless steel

The present results reveal the interest of sol–gel coating technique to improve 304 steel high temperature oxidation resistance. An yttrium sol–gel coating appears to enhance the oxidation resistance during isothermal oxidation test, to decrease widely the oxide weight gain and to reduce the initial transient oxidation stage generally observed in the case of blank steels. Moreover, the experimental results confirm that yttrium sol–gel coating also plays a significant role on the cyclic oxidation behaviour of the 304 steel. In fact, the yttrium addition promotes remarkably the prolongation of the period during which the oxide scale still remains adherent to the substrate.     

Compact equivalent circuit model of two‐layer spiral inductors

A compact lumped‐element equivalent circuit model of two‐layer integrated spiral inductors on silicon substrates is developed in this article. Based on this proposed model, excellent agreements are achieved between the measured and simulated S‐parameters for different inductors. Also, both self‐ and mutual inductances of two‐layer inductors are accurately extracted, and their overall performances are understood clearly. © 2003 Wiley Periodicals, Inc. Int J RF and Microwave CAE 13: 148–153, 2003.     

ZXJ10机IN业务功能扩展及实现

本文从智能网的基本概念入手,论述了利用 ZXJ10程控交换系统为发展智能网业务提供支持功能的技术策略以及分阶段实现的过程,并对各个阶段能够实现的业务作了简要介绍。     

二氧化氯处理油田回注水工艺

针对中原油田回注水中细菌易产生抗药性,难以控制的问题,提出了应用二氧化氯处理油田回注水工艺。经室内评价及现场试验,二氧化氯可杀死回注水中的细菌,控制微生物生长,同时该工艺可降低现有回注水污泥残渣产出量的50%,减少污泥对环境的污染,提高注水水质。     

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中国重庆川东地区是四川盆地天然气的主要储产地区，对川气东输工程具有举足轻重的影响，但由于勘探难度增大，使储量增长速度明显放慢，储采比快速下降，若元新的发现，将无法保证长期高产稳产。章针对该地区天然气储量资源的结构及现状，分析了二叠系、三叠系动勘探开发的潜力，认为在该区实施二叠系、三叠系滚动勘探开发是一项投资省、见效快的工作，指出重庆气矿近斯的发展方向应针对二叠系、三叠系实施滚动勘探开发。章还提出了相应的技术保障措施和近期工作的初步设想，优选了近期工作目标。     

硫化钠在黑白钨加温精选中的应用研究

介绍了柿竹园黑白钨混合粗精矿加温精选中 ,添加硫化钠与水玻璃混合剂比单一添加水玻璃能更有效地使白钨矿与萤石等含钙矿物及脉石矿物分离。论述了硫化钠在加温精选中的作用效果并探讨了其作用机理     

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。