俄罗斯减速器涡轮钻具驱动PDC钻头在西西伯利亚油田的成功应用

涡轮钻具由前苏联研制出来以后，得到了迅速发展，目前已发展到减速器涡轮钻具阶段。现在，俄罗斯西西伯利亚地区普遍使用减速器涡轮钻具钻井，而减速器涡轮钻具驱动PDC钻头的使用还是空白。采用俄罗斯生产的几种不同型号的减速器涡轮钻具，在西西伯利亚进行了驱动PDC钻头钻井的阶段性试验。试验结果表明，在优选PDC钻头结构的情况下，用减速器涡轮钻具驱动PDC钻头，钻头进尺和机械钻速都较牙轮钻头有显著的提高，经济和社会效益显著。介绍了试验中使用的3种俄罗斯减速器涡轮钻具(TPM-195，TPⅢ-195和TPO3—195)的结构特点和主要技术参数。     

运用现代CFD方法设计高效率的汽轮机(续前期)

论述了运用现代计算流体动力学(ComputationalFluidDynamics,CFD)技术设计高效率汽轮机的方法,典型应用的实例有全三维叶片级流场、叶片汽封和排汽蜗壳计算。计算结果和实际是相符的。进一步对结构性单元和非结构单元程序的计算结果进行了比较,已证明,非结构单元CFD程序用于复杂形状的流场计算时,结果与实际相当一致,并具有独特的功能。     

浅谈门式刚架轻型钢结构厂房中抗风柱的设置

通过对抗风柱上下端的节点几种形式进行分析比较,提出建议性的节点连续方式。     

Spin Dependent Hopping in Ti Doped La0.67 Ca0.33 MnO3

A systematic investigation of the magnetic and transport properties of Ti doped La0.67Ca0.33MnO3 was reported. The Ti substitution for Mn ions results in a reduction in ferromagnetism and conductivity. The metal-insulator transition temperature is close to Curie temperature which decreases from 274 to 82 K as x increases from 0 to 0.17. The most important effect of Ti doping is to introduce spin clusters in the samples due to the distortion of local lattice and the inhomogeneous magnetic structure induced primarily by the random distribution of Mn ions. A maximum magnetoresistance ratio as large as 90% in 1 T at 122 K was obtained for the sample with x =0. 055, which is four times larger than that obtained for LCMO sample at 272 K. There is a remarkable field-history dependent MR in the cooling process for the doped samples while such phenomenon disappears in the warming run. The resistivity follows well the variable range hopping behavior in paramagnetic state. Both the size effect and spin dependent hopping of carriers between the spin clusters should be considered in this system.     

Connecting the second exhaust-heat boiler to the operating first one under the conditions of flow circuits of combined-cycle plants with two gas-turbine units and one steam turbine

Problems arising with connecting the second exhaust-heat boiler to the first exhaust-heat boiler under load in the case of flow circuits of combined-cycle plants of type PGU-450 are considered. Similar problems exist for two-boiler single-turbine units of type PGU-325 and for two-boiler single-turbine units of traditional steampower plants with an output of 200–300 MW upon connection of the second furnace of a two-furnace boiler to the operating first furnace. Analysis of the temperature-induced stressed state and of the cyclic strength of thick-walled elements of the steam-water conduit of PGU-450 and of two-furnace boilers of two-boiler single-turbine units with an output of 200–300 MW (the check valve, the inlet header of the water economizer) is used for determining the steam temperature differences in the high-pressure conduits to the steam turbine and the order of connection of the second exhaust-heat boiler to the operating fist one. Modes of enabling a two-boiler single-turbine unit of a combined-cycle plant, which are most “rigid” from the standpoint of thermal strength, are determined. __________ Translated from élektricheskie Stantsii, No. 2, February 2006, pp. 11–17.     

反应离化团束（RICB）法生长CN硬质薄膜

用反应离化团束（ＲＩＣＢ）法，以低分子量聚乙烯为蒸发材料，氨气为反应气体，在ＮａＣｌ（１００）和Ｓｉ（１００）衬底上淀积Ｃ－Ｎ薄膜，透射电子衍射（ＴＥＭ）分析表明薄膜中含有β－Ｃ３Ｎ４晶粒，Ｘ射线光电子谱（ＸＰＳ）和红外吸收谱（ＩＲ）表明存在Ｃ，Ｎ原子的化学键合。     

Operating experience from the ehecatl wind turbines

This paper presents a summary of the mechanical features and the medium term operating experience from three small horizontal axis wind energy conversion systems covering a range of 500 to 5000 Watt, intented for rural and isolated communities. These turbines have a new regulator which reduces gyroscopic loads, is easy to adjust and could be manufactured stronger and in smaller sizes than the conventional tail vanes. It is concluded that is feasible to build cheaps and reliable wind turbine generators with an acceptable efficiency employing common-use elements, but is needed a careful and optimized design.     

眼球的自动定位

提出了一种由粗到细自动定位人脸的一个重要特征即眼球圆心的方法，该方法综合运用局部二值化，霍夫变换，像纱聚类，边缘提取等技术，对均匀或非均匀光照下拍摄或戴眼镜的照片都能获得很高的定位精度，适用于处理证件照。     

利用钨极氩弧焊技术修复1#汽轮机转子的实践

本文主要介绍了我厂利用钨极氩弧焊将1#发电机组汽轮机转子修复的工艺过程.     

脉冲化学沉积非晶态Ni—P合金原子分布函数研究

采用Ｘ射线衍射分析技术，研究了脉冲化学镀非晶态Ｎｉ－Ｐ合金的原子分布和函数，得出其短程有序原子集团的尺度为０．７５４ｎｍ，约为熔体激冷法获得的非晶态Ｎｉ－Ｐ合金短程有序畴的１／２。并利用脉冲化学沉积非晶态合金的微机制择这一结果进行了解释。