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71.
D. Simeone C. Dodane-Thiriet D. Gosset P. Daniel M. Beauvy 《Journal of Nuclear Materials》2002,300(2-3):151-160
Grazing X-ray diffraction was used to study in details the behaviour of two spinels, ZnAl2O4 and MgAl2O4 irradiated by swift ions. Such an irradiation allows to have an important irradiated depth and then accurate diffraction diagrams. Rietveld refinement done on these diagrams clearly show an order–disorder transition due to a melting of cations under irradiation in these two spinels. More especially, these results clearly exhibit that no new phase is created under irradiation in MgAl2O4. Raman spectroscopy, sensitive to the crystallographic space group, seems to confirm this analysis. 相似文献
72.
We discuss algorithms for learning and revising user profiles that can determine which World Wide Web sites on a given topic would be interesting to a user. We describe the use of a naive Bayesian classifier for this task, and demonstrate that it can incrementally learn profiles from user feedback on the interestingness of Web sites. Furthermore, the Bayesian classifier may easily be extended to revise user provided profiles. In an experimental evaluation we compare the Bayesian classifier to computationally more intensive alternatives, and show that it performs at least as well as these approaches throughout a range of different domains. In addition, we empirically analyze the effects of providing the classifier with background knowledge in form of user defined profiles and examine the use of lexical knowledge for feature selection. We find that both approaches can substantially increase the prediction accuracy. 相似文献
73.
74.
Examined the judgments made by 384 undergraduates and 384 50–74 yr olds of assailant and victim responsibility for a sexual assault. Ss were assigned to 1 of 3 conditions: they viewed slides of an assault, read a passage about the crime, or read the passage and saw photographs of both the assailant and the victim. The rapist was presented as either a well-dressed or poorly dressed young man, and the victim appeared either as a provocative or demure young woman. Ss also learned that the victim either physically resisted or failed to resist the assailant. Young Ss attributed more responsibility to the assailant than did older Ss, and the provocative woman was perceived as more responsible for the victimization than the demure woman. Young Ss attributed greater responsibility to the victim when she resisted the assault of a well-dressed assailant than when she resisted a poorly dressed assailant. Females attributed less responsibility to the demure woman when she was assaulted by a poorly dressed assailant than a well dressed assailant. In contrast to older Ss, young Ss who visually observed the crime held the victim more responsible for her victimization. Results are interpreted in terms of the defensive attribution hypothesis of E. Walster (see record 1966-02829-001) and the discounting principle of attribution presented by H. H. Kelley (see record 1973-24800-001). (French abstract) (31 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
75.
Memorializes E. E. Jones, whose early development of attribution theory, the actor–observer effect, and the correspondence bias as well as later work on self-handicapping, social stigma, and strategic self-presentation are central to modern social psychology. He built graduate programs at Duke and Princeton, trained many influential social psychologists, and received virtually every award in his field. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
76.
国产轻油预转化催化剂与进口催化剂相比,具有性能相当、价格低廉、供应方便等优势。国产预转化催化剂需在较高的液空速、温度较低的条件下实现烃类转化反应,生成含甲烷60%以上的富气。采用国产催化剂能明显反映性能价格比。文章对两种催化剂进行了工业应用比较和分析。 相似文献
77.
Robin Daniel J.; Berthier Neil E.; Clifton Rachel K. 《Canadian Metallurgical Quarterly》1996,32(5):824
Infants were presented with a moving object under 2 lighting conditions to investigate the role of vision in early reaching. The motion of the target object also allowed for an analysis of the infants' ability to use a predictive style of reaching. Infants were tested twice, at 5 and 7.5 months of age, with a moving object in the light and the same object painted with luminescent paint in the dark. Infants successfully contacted the glowing object on about half of their attempts at both ages, although 7.5 month-olds reached more often. Infants also took into account the motion of the target object by aiming their reaches ahead of the object and by reaching with their contralateral hand. These results suggest that proprioceptive feedback and sight of the target allow for successful reaching with limited visual information, even in relatively complex reaching tasks. The infants' success also demonstrates their ability to adapt their movements and reaching strategy to the speed and trajectory of the target object in order to reach predictively. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
78.
ODLC是当今用户接入网的新型设备,它一方面可取代端局,解决通信线路紧张和远距离大容量放号问题,另一方面也可满足日益增多的增值业务的需求。本文ODLC技术的基本原理,结合目前国内外常见ODLC系统,总结和对比了其基本特点,优势,并指明ODLC的技术发展方向和中国应用的前景。 相似文献
79.
The dislocation structures of bulk textured and epitaxial thin film YBa2Cu3O7 superconductors are examined. Correlations between increases in flux pinning and dislocation densities are noted. A model
for flux pinning by individual dislocations is presented. This gives a treatment of strain induced effects and effects of
normal state region interactions. It is shown that the values of pinning predicted are in line with experimental observations. 相似文献
80.
Christian Jennifer L.; O'Leary K. Daniel; Vivian Dina 《Canadian Metallurgical Quarterly》1994,8(1):32
Marital discord and depressive symptomatology have repeatedly been found to be associated, but little is known about variables that influence this relationship. Data were collected from 139 couples seeking marital therapy, and analyses were conducted separately by gender. For wives, lower problem-solving ability, physical aggression by the partner, and 1 relationship belief predicted depressive symptomatology after the variance due to marital discord was removed in regression analyses. In addition to these predictors, less spouse-specific assertiveness, unemployment, and 1 other relationship belief were associated with depressive symptomatology for women after the variance due to marital discord was removed in partial correlation analyses. For men, only lower problem-solving ability added to the prediction of depressive symptomatology. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献