3H/14C联合取样装置的研制及初步实验结果

研制了一套3H 14C联合取样装置,并用该装置对某重水研究堆烟囱气态排出流中3H、14C浓度进行了5次测量。结果表明,开堆期间(堆运行功率7MW)3H、14C浓度分别约为1 29×104、220Bq m3。3H浓度变化受堆芯相关操作影响较大,14C的浓度变化表现为随着反应堆的运行逐渐升高,停堆以后逐渐下降。测量结果基本反应了该堆的运行情况。     

Le département de psychologie de l'université de Montréal: Cinquante ans de qualité dans la diversité.

In honour of the 50th Anniversary of the Département de psychologie, this special issue of Canadian Psychology provides you with seven scientific papers written by professors and researchers within the Department. These papers illustrate the diversity of research efforts originating from the Département de psychologie at the Université de Montréal. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Plan recognition for interface agents

Interface agents are computer programs that provide personalized assistance to a user dealing with computer based applications. By understanding the tasks the user performs in a software application an interface agent could be aware of the context that represents the user’s focus of attention at each particular moment. With this purpose, plan recognition aims at identifying the plans or goals of a user from the tasks he (for simplicity, we use “he” to refer to the user, but we do not mean any distinctions about sexes) performs. A prerequisite for the recognition of plans is knowledge of a user’s possible tasks and the combination of these tasks in complex task sequences, which describes typical user behavior. Plan recognition will enable an interface agent to reason about what the user might do next so that it can determine how to assist him. In this work we present the state of the art in Plan Recognition, paying special attention to the features that make it useful to interface agents. These features include the ability to deal with uncertainty, multiple plans, multiple interleaved goals, overloaded tasks, noisy tasks, interruptions and the capability to adapt to a particular user.     

退火工艺对3A21-H14带材表面花纹状缺陷的影响

采用3种不同的中间退火工艺对不同加工率的3A21合金带材进行再结晶退火，然后分别采用不同的再加工率将其轧制成不同厚度的成品带材。根据试验结果分析了退火工艺、再加工率等对3A21-H14带材表面花脸状条纹的影响，提出了减轻这种表面缺陷的措施。     

Effect of Post Annealing on the Microstructure and Magnetic Properties of NdFeB/α-Fe/NdFeB Thin Films

A series of nanocomposite thin films, composed of Nd2Fe14B and α-Fe, has been prepared by DC-magnetron sputtering combined ion beam sputtering onto Si (100) substrates. The effects of post annealing on the microstructure and magnetic properties of [NdFeB/α-Fe/NdFeB]-type thin films have been investigated. The X-ray diffraction (XRD) study showed that annealing of the films for 30min at temperatures 550,600,650,700℃ resulted in the appearance of diffraction peaks, characteristic for Nd2Fe14B tetragonal structure, α-Fe and Nd2O3 phases. The investigation using the Vibrating Sample Magnetometer (VSM) with a maximum applied field of 2 T indicated that with the increase of the annealing temperature, the magnetic properties of the multilayer films were improved and reached peak value at 650℃ (Hci=41.72kA·m-1, Mr/Ms=0.4, (BH)max=30.35kJ·m-3), after which the magnetic properties were decreased greatly. Along with the increase of the thickness of α-Fe layer from Tα-Fe16nm, the coercivity Hci, saturation magnetization Ms, and remanence ratio Mr/Ms all declined. As the Atomic Force Microscope (AFM) indicated, after being annealed at 650℃ for 30min, the sample was showed fine surface morphology with grain size 60nm≤dα-Fe≤80nm and 100nm≤dNdFeB≤150nm.     

连轧14#等边角钢孔型设计

介绍柳钢中型厂在连轧生产线生产14#等边角钢的孔型系统选择、闭口蝶式孔设计，以及试轧、调整。     

纳米晶Fe_3B/Nd_2Fe_(14)B粘结永磁体的磁性能研究

本文研究了粘结剂含量和温度－时间变化对纳米晶Ｆｅ３Ｂ／Ｎｄ２Ｆｅ１４Ｂ粘结永磁材料的磁性能影响。结果表明降低粘结剂含量可显著地提高纳米晶Ｆｅ３Ｂ／Ｎｄ２Ｆｅ１４Ｂ粘结永磁的磁性能；环境温度对纳米晶Ｆｅ３Ｂ／Ｎｄ２Ｆｅ１４Ｂ粘结永磁的磁性能具有重要影响，在较高的温度下其磁性能将显著下降，因此纳米晶Ｆｅ３Ｂ／Ｎｄ２Ｆｅ１４Ｂ粘结永磁只能在较低的温度环境下使用     

The rise of qualitative research in psychology.

A study is presented on the rise of qualitative research in psychology over the 20th century. The incidence of qualitative research as indicated by several search terms (i.e., "qualitative research," "grounded theory," "discourse analy*," "empirical phenomenological," and "phenomenological psychology") was traced through the PsycINFO and Dissertation Abstracts International databases. It was found that, with the exception of the search terms having to do with phenomenology, records containing these search terms were basically non-existent until the 1980s, when there was a sharp rise that intensified in the 1990s. The PsycINFO records were sorted according to (1) whether they came from psychology or other social and health science disciplines; (2) region of origin; (3) the types of document to which they referred; and (4) whether they focused on the methodology or the application of qualitative research. A number of interesting differences emerged from this comparative analysis. Implications of the findings for the supposition that a paradigm shift may be underway are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

A model for the interaction between plant GAPN and 14-3-3zeta using protein-protein docking calculations, electrostatic potentials and kinetics

Phosphorylated non-phosphorylating glyceraldehyde-3-phosphate dehydrogenase (EC 1.2.1.9; GAPN) found in heterotrophic cells of wheat is activated by MgCl₂. The divalent cation disrupts the interaction between GAPN and a 14-3-3 regulatory protein. This effect is quite remarkable, since it has previously been shown that 14-3-3 binding to a target protein requires divalent cations as Mg²⁺ or Ca²⁺. Binding of the divalent cation to 14-3-3 causes an increase in surface hydrophobicity. Crystal structure of a 14-3-3-target protein complex has been only determined for serotinin N-acetyltransferase. We utilized a model of a subunit of plant GAPN and the crystallographic structure of human 14-3-3ζ to shape the complex between theses two proteins. Initial dockings were performed with the BiGGER program, which allows an exhaustive search of translational and rotational space. A filtering procedure was then applied to reduce the number of complexes to a manageable number. We predict the structural characteristics of GAPN–14-3-3ζ binding process, proposing that the main attractive force in this complex derives from electrostatic interactions. The predicted model was corroborated by analysis of kinetic behavior of GAPN and its relationship with pH and ionic strength conditions. This study provides a variant on the interaction of 14-3-3 with target proteins, thus affording a wider scenario to establish possible structural models for this remarkable family of regulatory proteins.