ATM与帧中继互连技术

ＡＴＭ技术是ＩＴＵ－Ｔ推荐的Ｂ－ＩＳＤＮ交换技术，而帧中继在提供广域网业务方面很成功。因此，在ＡＴＭ发展的初期不可避免地会与帧中继技术并存。本文阐述了ＡＴＭ与帧中继网络互加和业务互连的相关技术及其存在的问题。     

“中国式”非显形奢华

奢侈品在中国逐渐成为热门产业,建立在精神层面上的“非显形奢华”也渐为众人关注。中国拥有深厚的文化底蕴,足以创造撼动视觉新体验的新“奢华”美学。当创意市场不断推进,变得成熟之后,中国的“非显形奢华”定会有更高的价值,奢华不再是炫耀身份的代名词,而是融合民族特色、具有独特的设计品位,真正意义上的顶级产品或服务,是一种低调、内敛、优雅的“非显形奢华”。     

Precipitation behavior of σ phase in fusion zone of dissimilar stainless steel welds during multi-pass GTAW process

The purpose of this study is to investigate the precipitation characteristics of σ phase in the fusion zone of stainless steel welds at various welding passes during a tungsten are welding (GTAW) process. The morphology, quantity, and chemical composition of the δ-ferrite and σ phase were analyzed using optical microscopy (OM), a ferritscope (FS), a X-ray diffractometer (XRD), scanning electron microscopy (SEM), an electron probe micro-analyzer (EPMA), and a wavelength dispersive spectrometer (WDS), respectively. Massive δ-ferrite was observed in the fusion zone of the first pass welds during welding of dissimilar stainless steels. The σ phase precipitated at the inner δ-ferrite particles and decreased δ-ferrite content during the third pass welding. The σ and δ phases can be stabilized by Si element, which promoted the phase transformation of σ→ϱ+λ₂ in the fusion zone of the third pass welds. It was found that the σ phase was a Fe−Cr−Si intermetallic compound found in the fusion zone of the third pass welds during multi-pass welding.     

葛洲坝电站2号水轮机转轮室中环修复

针对葛洲坝电站2号机组运行中出现转轮室中环损坏的现象,设计制造出转轮室现场机加工的大型专用机床,在修复改造过程中,解决了一系列技术难题,改造后技术指标均达到理想水平,为电站机组现场修复技术积累了宝贵经验.     

Optimization of the power ascension path for a boiling water reactor using genetic algorithms

To ensure the core status can meet the requirements of thermal limits, stability and other constraints during the power ascension process of a nuclear power plant, operators usually gradually increase power based on onsite measurements and experience. To reduce the operator’s burden, this research develops a method to find an optimal power ascension path that can be followed by operators. The power ascension path is formulated as a multiobjective optimization problem with the following constraints: power ascension time, thermal limits, core stability and maximum rod line. A genetic algorithm is adopted to obtain the optimal power ascension path. The results show that using our approach full power can be achieved quickly, while maintaining reasonable margins of thermal limit and stability, in addition to satisfying maximum rod line criteria.     

浅析结构化在岗培训模式

结构化在岗培训模式(S-OJT)具有计划性强、目标明确、一对一培训、培训场景真实等特点。S-OJT的设计和实施为6个步骤:确定是否采用S-OJT、工作分析、培养培训指导老师、制作S-OJT模块、实施S-OJT和培训过程评估与改进。     

油井细粉砂防砂工艺技术研究与应用

辽河油田的油井出细粉砂严重，通过防砂基础理论及试验研究，形成了地层深部防砂与携排砂采油技术。在出细粉砂油井及出砂区块进行试验、应用，年平均采取防砂措施300余井次，防砂成功率达90％以上。     

气门用4Cr9Si2钢调质工艺研究

采用正交试验 ,研究了 4Cr9Si2钢的淬火温度、回火温度与组织、硬度间的关系 ,得出了最佳的工艺参数 (10 10℃淬火 ,6 0 0℃回火 )。实际生产表明 ,采用此工艺后 ,断裂现象基本消除 ,气门的热处理质量有了明显提高。     

新技术在制盐行业设备管理中的应用

通过新设备、新技术的引进和应用。重庆索特股份有限公司加强设备管理，不管是在规范性上，还是在可操作性上，都取得了明显的效果。去年全年设备维修费用大幅度降低，经济效益明显。