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91.
高速铁路具有高度集成、高精度的技术特点,运营过程中经受列车质量、速度、密度等多种因素影响,地理位置因素往往是影响铁路设备状态演变的决定性因素。采用网格化管理技术可将空间上连续分布的管理对象划分成较小的单元网格,有利于从空间位置角度研究管理对象状态的变化规律。随着信息系统技术、大数据技术的迅猛发展,基于位置而不是基于专业更符合高速铁路的管理需求,网格化管理技术给高速铁路管理带来了新的视角。  相似文献   
92.
情境迁移理论强调学习情境性对成功迁移具有不可或缺的重要意义。支撑-活动观是情境理论的代表性迁移观点,强调成功的迁移离不开能够提供有效支撑的真实情境。Second Life是建立在Web2.0平台上的三维虚拟社区,该社区为实训学习提供了良好的情境。以支撑-活动情境理论为指导,探讨Second Life(SL)如何促进实训学习的迁移。  相似文献   
93.
Economic issues linked to career counseling are a cause for concern to policy makers in developed countries because they expect career practitioners to provide evidence of the efficiency of career counseling interventions. The aim of this study was to test an individual evaluation method mixing time series (outcomes) and life narrative (processes). The method used 5 items related to 1 client's career decision self‐efficacy and studied the evolution of those items throughout the intervention of 1 career counselor (43 days). Changepoint analysis helped in identifying the changes that have to be taken into account for time series and which are contextualized in the client's verbatim analysis. This mixed method highlighted that the career counselor's intervention increased the client's career decision self‐efficacy. Practitioners could use the methodology proposed in this article to evaluate their interventions. They could also report their practice to clients, employers, and decision makers.  相似文献   
94.
This paper considers the design of accelerated life test (ALT) sampling plans under Type I progressive interval censoring with random removals. We assume that the lifetime of products follows a Weibull distribution. Two levels of constant stress higher than the use condition are used. The sample size and the acceptability constant that satisfy given levels of producer's risk and consumer's risk are found. In particular, the optimal stress level and the allocation proportion are obtained by minimizing the generalized asymptotic variance of the maximum likelihood estimators of the model parameters. Furthermore, for validation purposes, a Monte Carlo simulation is conducted to assess the true probability of acceptance for the derived sampling plans.  相似文献   
95.
This study used the social cognitive theory of well‐being (SCTW; Lent, 2004 ) to examine the role of career decision self‐efficacy (CDSE), perceived educational barriers, and independent self‐construal on the life satisfaction of 176 Mexican American college women. A 3‐step hierarchical regression analysis indicated that independent self‐construal, CDSE, and fewer perceived educational barriers significantly predicted greater life satisfaction among Mexican American college women above and beyond the influence of socioeconomic status and generational status. These findings are consistent with SCTW and highlight the need for counselors and researchers to be aware of the role that self‐construal, CDSE, and perceived educational barriers can have on Mexican American women's life satisfaction. Implications for practice at the secondary‐school and university levels are discussed.  相似文献   
96.
全椒吴氏家族与扬州关系密切,扬州的人文环境和吴家先辈的扬州经历使得吴氏子弟尤其钟情扬州.扬州给予吴烺诸多营养,扬州生活成就了吴烺文学、学术以及思想等方面的造诣;祖辈兴家的自豪与家业衰颓的悲伤,吴烺于此皆能找到寄托.吴烺与一大批学者的扬州交游唱和等也促进了扬州文化的发展与繁荣;另一方面,吴烺扬州经历及文学创作也反映了那个时代知识分子所历经的种种苦难与不幸,说明了封建家族与封建时代文人悲剧命运的必然性.  相似文献   
97.
地铁是城市发展现代化的一个重要标志。本文分析了国内外城市地铁的构建、运营以及地铁在城市化进程中的作用,进而系统阐释了地铁对广州城市发展、社会生活及生态环境的影响和意义。  相似文献   
98.
This study uses content analysis to provide a qualitative exploration of how life roles are affected by frequent (i.e. at least weekly) gambling, based on in-depth interviews with a community sample of 161 non-treatment-seeking frequent gamblers. Over half (51.6%) of the participants indicated problems associated with gambling and 131 examples were identified. The majority of problems were relational (50.4%), followed by financial (19.8%), work (13.7%), and school related (8.4%). Slightly less than half of participants (41.7%) reported losses due to gambling and 92 examples were provided. The most frequently reported loss was identity related (54.3%), which included self-esteem/shame (38.0%), estrangement from family (34.0%), estrangement from friends (16.0%), and estrangement from work colleagues (6.0%). Additional losses included health (29.3%) and financial (8.7%). Almost two-thirds of participants (64.6%) reported difficulty concentrating in family (18.4%), work (16.8%), and school (9.6%) activities, whereas general concentration problems comprised an additional 48.8% of the examples provided. Half of participants (49.1%) discussed behavioral withdrawal due to gambling, which included withdrawal from work (44.3%), relationships (24.5%), school (15.1%), and personal (6.6%) activities. These findings paint a complex picture of how gambling interferes with different life roles for some frequent gamblers, identifying important areas for future research and practice.  相似文献   
99.
夏世华 《求是学刊》2012,39(2):51-56
文章系统解读了楚简《唐虞之道》第14至29号简的思想内涵及脉络,认为这部分简文首先通过尧成为天子之原因的追问,突出了德与位的张力问题,即在应然之理上,有位必当有德,但就实然之事看,有德未必有位.简文对这一德位张力有两个层面的解决方案:一方面,要求有德无位者全力修德,谨守性命,安于时命,养成恒常如一的圆满德行,从而能在得位而治时能“利天下而弗利”;另一方面,要求有位者透悟性命之正,从而能主动尚德授贤、退而养生,这既能使贤者居位而利天下,又能退而养生以自利.简文将“七十致政”之礼普遍化,试图断绝天子终身制的构想,也具有深刻的政治哲学意义.  相似文献   
100.
The mean residual life measures the expected remaining life of a subject who has survived up to a particular time. When survival time distribution is highly skewed or heavy tailed, the restricted mean residual life must be considered. In this paper, we propose an additive–multiplicative restricted mean residual life model to study the association between the restricted mean residual life function and potential regression covariates in the presence of right censoring. This model extends the proportional mean residual life model using an additive model as its covariate dependent baseline. For the suggested model, some covariate effects are allowed to be time‐varying. To estimate the model parameters, martingale estimating equations are developed, and the large sample properties of the resulting estimators are established. In addition, to assess the adequacy of the model, we investigate a goodness of fit test that is asymptotically justified. The proposed methodology is evaluated via simulation studies and further applied to a kidney cancer data set collected from a clinical trial.  相似文献   
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