排序方式： 共有35条查询结果，搜索用时 17 毫秒
1.
Jakob L. Vingren Ronald G. Budnar Jr. Amy L. McKenzie Anthony A. Duplanty Hui-Ying Luk Danielle E. Levitt 《Journal of sports sciences》2016,34(8):694-699
This study investigated the acute endocrine responses to a 164-km road cycling event in a hot environment. Thirty-four male experienced cyclists (49.1 ± 8.3 years, 86.8 ± 12.5 kg, 178.1 ± 5.1 cm) participating in a 164-km road cycling event were recruited. Blood samples were collected within 0.3–2.0 h before the start (PRE: ~0500–0700 h) and immediately following the ride (POST). Samples were analysed for testosterone, growth hormone (GH), cortisol and interleukin-6 (IL-6). The temperature and humidity during the event were 35.3 ± 4.9°C and 47.2 ± 14.0%, respectively. Based on the finishing time, results for the fastest (FAST, 305 ± 10 min) and the slowest (SLOW, 467 ± 31 min) quartiles were compared. At POST, testosterone concentration was significantly (P < 0.05) lower (PRE, 20.8 ± 8.6; POST, 18.2 ± 6.7 nmol · L?1), while GH (PRE, 0.3 ± 0.1; POST, 2.3 ± 0.3 µg · L?1), cortisol (PRE, 661 ± 165; POST, 1073 ± 260 nmol · L?1) and IL-6 (PRE, 4.0 ± 3.4; POST, 22.4 ± 15.2 pg · mL?1) concentrations were significantly higher than those at PRE. At POST, GH and cortisol were significantly higher for the FAST group than for the SLOW group (GH, 3.6 ± 2.0 and 1.0 ± 0.8 µg · L?1; cortisol, 1187 ± 209 and 867 ± 215 nmol · L?1). Participation in an ultra-endurance road cycling event in a hot environment induced significant acute changes in concentrations of circulating hormones, with a greater augmentation of GH and cortisol in those completing the ride fastest. 相似文献
2.
通过模糊聚类方法可以对软件需求进行类别划分;通过灰色关联方法,可以对每个类别内的需求进行重要程度排序.这种分析方法可以为需求管理提供一个科学的解决途径. 相似文献
3.
通过模糊聚类方法可以对软件需求进行类别划分;通过灰色关联方法,可以对每个类别内的需求进行重要程度排序.这种分析方法可以为需求管理提供一个科学的解决途径. 相似文献
4.
Pattie Luk Fong Yuk Yee 《比较教育学》2001,37(1):65-87
Personal and social education has become an important area of development in education in Hong Kong. Given that much of the literature on personal and social education is Anglo-American or European, what is the influence on the largely Chinese settings in Hong Kong? This paper will examine some of the debates of what constitutes personal and social education. The significance of competing contexts in the development of personal and social education will be analysed in detail. Comparisons will be made between Western and Chinese (especially Confucian) views on personal and social education. Attempts will be made to come up with a notion of personal and social education which is suitable for the Hong Kong context. 相似文献
5.
Suet Ching Luk 《British journal of educational technology : journal of the Council for Educational Technology》1998,29(2):137-147
Field independent students are generally expected to perform better academically than those who are field dependent, and this is particularly marked in distance learning where students learn without the traditional support offered in conventional instruction. In this paper two studies of the relationship between field dependence and academic learning in the context of distance learning are reported with Bachelor of Health nursing students in Hong Kong. In both studies field independent nurses performed significantly better than field dependent ones. Some implications of these findings for distance learning are discussed. 相似文献
6.
Lukáš Babka 《Slavic & East European Information Resources》2017,18(3-4):165-184
This study focuses on the visual collections in the holdings of the Slavonic Library (a section of the National Library of the Czech Republic). The library holdings also include unique collections relevant to the topic of Russian and Ukrainian emigration: collections of visual art, ex libris, posters and flyers by Ukrainian émigrés (1918–1945), and a collection of invitations and flyers by Russian émigrés (1918–1945). Rudolf H?lka’s collection of photographs, dating back to the 1920s, captures a series of ethnographic, folkloric, and architectonic phenomena which no longer exist. Moreover, Russian posters from the period of WWI, from the revolutionary year of 1917, and the subsequent civil war are equally fascinating as are banknotes from the same period and region. 相似文献
7.
Robert W. P. Luk 《Information Retrieval》2008,11(6):539-561
This paper discusses various issues about the rank equivalence of Lafferty and Zhai between the log-odds ratio and the query
likelihood of probabilistic retrieval models. It highlights that Robertson’s concerns about this equivalence may arise when
multiple probability distributions are assumed to be uniformly distributed, after assuming that the marginal probability logically
follows from Kolmogorov’s probability axioms. It also clarifies that there are two types of rank equivalence relations between
probabilistic models, namely strict and weak rank equivalence. This paper focuses on the strict rank equivalence which requires
the event spaces of the participating probabilistic models to be identical. It is possible that two probabilistic models are
strict rank equivalent when they use different probability estimation methods. This paper shows that the query likelihood,
p(q|d, r), is strict rank equivalent to p(q|d) of the language model of Ponte and Croft by applying assumptions 1 and 2 of Lafferty and Zhai. In addition, some statistical
component language model may be strict rank equivalent to the log-odds ratio, and that some statistical component model using
the log-odds ratio may be strict rank equivalent to the query likelihood. Finally, we suggest adding a random variable for
the user information need to the probabilistic retrieval models for clarification when these models deal with multiple requests. 相似文献
8.
提出基于过程方法的集成制造模式下产品质量形成全过程的系统模型,在建模中融入了工作流的原理和方法,并在此基础上分别从组织模型、功能模型、过程模型、信息模型等方面进行分析和研究.该模型可以解决因业务流程的变更及与其他业务系统的集成而带来的问题,提高了系统的适应性与柔性.通过在某半导体制造企业的质量管理应用实践表明,该模型是可行的. 相似文献
9.
Luk Pattie 《Pastoral Care in Education》2000,18(2):42-46
This paper looks at the developmental needs of teachers in relation to facilitating the personal and social development of students. It goes on to describe a module, 'Personal and Social Education', offered to all pre-service teachers in the Hong Kong Institute of Education which aims at equipping trainee teachers to carry out the guidance role of a teacher in the context of Hong Kong, particularly in the role of a class teacher. It concludes with the results of a survey seeking the views of these trainees on the module they had undertaken. 相似文献
10.
This paper describes our novel retrieval model that is based on contexts of query terms in documents (i.e., document contexts). Our model is novel because it explicitly takes into account of the document contexts instead of implicitly using the document contexts to find query expansion terms. Our model is based on simulating a user making relevance decisions, and it is a hybrid of various existing effective models and techniques. It estimates the relevance decision preference of a document context as the log-odds and uses smoothing techniques as found in language models to solve the problem of zero probabilities. It combines these estimated preferences of document contexts using different types of aggregation operators that comply with different relevance decision principles (e.g., aggregate relevance principle). Our model is evaluated using retrospective experiments (i.e., with full relevance information), because such experiments can (a) reveal the potential of our model, (b) isolate the problems of the model from those of the parameter estimation, (c) provide information about the major factors affecting the retrieval effectiveness of the model, and (d) show that whether the model obeys the probability ranking principle. Our model is promising as its mean average precision is 60–80% in our experiments using different TREC ad hoc English collections and the NTCIR-5 ad hoc Chinese collection. Our experiments showed that (a) the operators that are consistent with aggregate relevance principle were effective in combining the estimated preferences, and (b) that estimating probabilities using the contexts in the relevant documents can produce better retrieval effectiveness than using the entire relevant documents. 相似文献