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1.
    
Precipitation of Cr-rich carbides, diffusible hydrogen content and heterogeneous microstructure formation across the weldments makes heat-affected zone (HAZ) susceptible to intergranular cracking and makes weldability of creep strength enhanced ferritic (CSEF) Grade P92 steel a critical issue. In the present research work, the Granjon implant test and mercury method (for diffusible hydrogen measurement) have been performed on Grade P92 steel welded specimens to study the effect of welding parameters on diffusible hydrogen levels and their subsequent effect on hydrogen-assisted cracking (HAC). The weld metal was deposited by a shielded metal arc welding process on Grade P92 steel samples using P92 matching filler. The three different welding conditions are used to measure the diffusible hydrogen level in the deposited metal. Granjon implant test was performed to evaluate HAZ HAC susceptibility with similar welding conditions which were used in the mercury method. Lower critical stress (LCS) was also evaluated using the Granjon implant test. The higher susceptibility of CSEF Grade P92 steel welded plate towards HAZ HAC was noticed in case of lower heat input or higher diffusible hydrogen content. However, by considering LCS, fracture mode and diffusible hydrogen content, the weld deposited using the highest heat input (condition III) offers great resistance to HAZ HAC.  相似文献   
2.
This paper examines the role of trait emotional intelligence (trait EI) in gamers’ preferences for play and frequency of gaming in a sample of 1051 young adult US/European gamers, who play frequently the online massively multiplayer game, World of Warcraft (WoW). Trait EI was shown to predict social and achievement preferences for play as well as frequency of gaming. In particular, trait EI was positively correlated to a preference for social practices per se and negatively correlated to a preference for achievement-oriented, instrumental practices. These findings advocate that gamers’ preferences for play are in accordance with their emotion-related personality characteristics. Trait EI was also negatively associated with frequency of gaming suggesting that lower scorers on trait EI are more likely associated with more frequent game use.  相似文献   
3.
Risk management is becoming increasingly important for railway companies in order to safeguard their passengers and employees while improving safety and reducing maintenance costs. However, in many circumstances, the application of probabilistic risk analysis tools may not give satisfactory results because the risk data are incomplete or there is a high level of uncertainty involved in the risk data. This article presents the development of a risk management system for railway risk analysis using fuzzy reasoning approach and fuzzy analytical hierarchy decision making process. In the system, fuzzy reasoning approach (FRA) is employed to estimate the risk level of each hazardous event in terms of failure frequency, consequence severity and consequence probability. This allows imprecision or approximate information in the risk analysis process. Fuzzy analytical hierarchy process (fuzzy-AHP) technique is then incorporated into the risk model to use its advantage in determining the relative importance of the risk contributions so that the risk assessment can be progressed from hazardous event level to hazard group level and finally to railway system level. This risk assessment system can evaluate both qualitative and quantitative risk data and information associated with a railway system effectively and efficiently, which will provide railway risk analysts, managers and engineers with a method and tool to improve their safety management of railway systems and set safety standards. A case study on risk assessment of shunting at Hammersmith depot is used to illustrate the application of the proposed risk assessment system.  相似文献   
4.
干熄焦系统红焦装入线是自动化运行过程,各种单体设备运行是依靠各种指令和指令交换来实现自动控制的,对于从事干熄焦电气或初学者来说,如果不熟知干熄焦EI系统红焦装入线的各种指令及指令交换的过程,就很难判断自动模式下红焦装入线因指令错误造成的生产中断以及故障的原因,这种错误的指令常常能够自动消失或复位,在现场很难被捕捉到,因此本文将重点解析干熄焦系统红焦装入线上各单体设备的各种指令。  相似文献   
5.
1 . INTRODUCTIONIntroductionEINi noPhenomenon ,thelargestinterannualclimatesignal ,isthefirstclimatephe nomenonshowntodependessentiallyuponcoupledair seainteractionsinthePacificregions .In pastdecadesmanyeffortshavebeenmadeinunder standingandpredictingENSO :suchasthehypoth esisofBjerknes[1] thatENSOarisesasaself sus tainedcycleinwhichSSTAinthePacificcausethetradewindstostrengthenorslackenandthatthisinturndrivestheoceancirculationchangesthatproduceSSTA ;Wyrtki’srelaxationtheory[…  相似文献   
6.
SCL-1型液晶的质谱法剖析   总被引:2,自引:0,他引:2  
液晶自上个世纪70年代以来,由于其独特的性能,引起了化学工作者的极大兴趣和普遍关注,到1987年就合成出了900万扭曲型液晶。现代液晶的应用一般都是由几种到20几种不同液晶的混合物,这样方能满足液晶材料的物理化学性能。液晶的质谱研究及相关资料报道甚少1-5,对其混合物的研究剖析更少6-7。本文报道了用GC/MS(EI)、GC/MS(CI)、GC/FTIR多种技术对宽温型(SCL)液晶进行了全面分析研究,并对其质谱裂解机理作了一定研究。这对我国今后液晶产业化进程具有一定的促进作用。  相似文献   
7.
张炯 《华中建筑》2005,23(1):34-35
分析美国的《工程索引》EI和《科学引文索引》SCI的基础上,该文研究了美国的EI对中国建筑学期刊的检索情况,目前只有《华中建筑》和《新建筑》两种期刊入录EIEI收录《华中建筑》和《新建筑》对我们有十分重要的意义,表明这两种建筑学期刊已经具备了国际性影响。该文提供了在最近年度EI收录《华中建筑》的25篇论文目录。  相似文献   
8.
    
This review article will give an up-to-date and exhaustive overview on the efficient use of electron ionization (EI) to couple liquid chromatography and mass spectrometry (LC-MS) with an innovative interface called Direct-EI. EI is based on the gas-phase ionization of the analytes, and it is suitable for many applications in a wide range of LC-amenable compounds. In addition, thanks to its operating principles, it prevents unwelcome matrix effects (ME). In fact, although atmospheric pressure ionization (API) methodologies have boosted the use of LC-MS, the related analytical methods are sometime affected by inaccurate quantitative results, due to unavoidable and unpredictable ME. In addition, API's soft ionization spectra always demand for costly and complex tandem mass spectrometry (MS/MS) instruments, which are essential to acquire an \"information-rich\" spectrum and to obtain accurate quantitative information. In EI a one-stage analyzer is sufficient for a qualitative investigation and MS/MS detection is only used to improve sensitivity and to cut chemical noise. The technology illustrated here provides a robust and straightforward access to classical, well-characterized EI data for a variety of LC applications, and readily interpretable spectra for a wide range of areas of research. The Direct-EI interface can represent the basis for a forthcoming universal LC-MS detector for small molecules.  相似文献   
9.
本文简单阐述了EI32-JD型计算机联锁系统结构,分析现场调试中需要注意的几个问题,提出了在现场调试过程中应采取的措施和建议。  相似文献   
10.
对2005年度发表的中文石油科技期刊论文被EI收录的情况进行了检索、统计与分析。共有13种中文石油期刊发表的2514篇论文被EI Compendex Web收录,其中《天然气工业》、《钻采工艺》、《油气井测试》和《石油学报(石油加工)》4种期刊上发表的1064篇论文被EI核心收录。EI收录论文总数和核心收录论文篇数均创历年新高,表明我国石油科技论文的水平进一步提高。但是,与高达77种之多的庞大的中文石油科技期刊群和每年数以万计的中文石油科技论文产出量相比,EI所收录的中文石油科技期刊种数和论文篇数仍处于较低水平。  相似文献   
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