植物多倍体基因组的形成与进化

多倍化是植物进化变异的自然现象，也是促进植物发生进化改变的重要力量。在被子植物中，约 70％的种类在进化史中曾发生过一次或多次多倍化的过程。目前的研究结果表明，自然界绝大多数多倍体是通过未减数配子的融合而形成的，并且很多多倍体种是通过多次独立的多倍化过程而重复发生的。由多倍化所导致的重复基因在多倍体基因组中可能有三种不同的命运，即：保持原有的功能、基因沉默或分化并执行新的功能。多倍化以后，重复基因组的进化动态则主要表现在染色体重排和“染色体二倍化”、不同基因组之间的相互渗透、以及核-质之间的相互作用等方面。     

Performance prediction of data fusion for information retrieval

The data fusion technique has been investigated by many researchers and has been used in implementing several information retrieval systems. However, the results from data fusion vary in different situations. To find out under which condition data fusion may lead to performance improvement is an important issue. In this paper, we present an analysis of the behaviour of several well-known methods such as CombSum and CombMNZ for fusion of multiple information retrieval results. Based on this analysis, we predict the performance of the data fusion methods. Experiments are conducted with three groups of results submitted to TREC 6, TREC 2001, and TREC 2004. The experiments show that the prediction of the performance of data fusion is quite accurate, and it can be used in situations very different from the training examples. Compared with previous work, our result is more accurate and in a better position for applications since various number of component systems can be supported while only two was used previously.     

The power of emotions: Can enjoyment and boredom explain the impact of individual preconditions and teaching methods on interest and performance in mathematics?

We investigated students’ emotions as intervening variables between teaching methods, motivational and performance prerequisites, and outcomes. 144 students from German schools were assigned to two conditions. In one condition, students were prompted to develop multiple solutions for modelling problems that were missing information. In the other condition, students had to find one solution for modelling problems that were not missing information. Students’ interest and performance were measured before and after the 5-lesson teaching unit, and students’ enjoyment and boredom were measured during the teaching unit. The path analyses revealed: (1) Students who developed more solutions enjoyed their mathematics lessons more and were less bored than students in the other condition; (2) Enjoyment affected students’ interest and performance at posttest and mediated the effects of prompting them to find multiple solutions on interest at posttest; (3) Students’ enjoyment during learning mediated the effects of prior interest on interest at posttest.     

An Holistic Approach for Counsellors: Embracing Multiple Intelligences

This paper explores a range of therapeutic modalities used by counsellors of children and positions those modalities within Gardner’s theory of multiple intelligences. Research by O’Brien (Gardner’s theory of multiple intelligence and its implications for the counselling of children. Unpublished doctoral dissertation, Queensland University of Technology, Brisbane, Australia, 1999) revealed that by drawing on a combination of preferred intelligences, children were able to enhance the dialogue between the unconscious and conscious, while strengthening the relationship between the counsellor and client. A number of useful counselling approaches are highlighted in working with children, particularly younger children who have not yet developed language sufficient for more formal counselling sessions. Suggestions that assist counsellors to operate across settings are explored.     

Students’ evaluation of academic courses: An exploratory analysis to an Italian case study

Students’ evaluations of teaching is a common practice in higher education institutions, with the main purpose of improving course quality and effectiveness. In this paper we would like to contribute to the existing literature on course and teaching evaluation by providing an empirical analysis based on questionnaires collected by an Italian private institution, namely the Libera Università Maria Ss. Assunta (LUMSA), for several degrees in Social Sciences. In order to identify the main factors affecting students’ satisfaction, we use not only teaching indicators and degree-specific characteristics, but also control for student-specific characteristics. Our analysis is based on a Multiple Correspondence Analysis for categorical variables, which represents a very useful method to study the multidimensional relationship among qualitative variables, along with a hierarchical clustering, in order to better summarize the results. Our findings reveal that student satisfaction relates to teaching and course organization. Moreover, we find some evidence that students typically evaluate their course on the basis of their experience rather than their personal interests.     

浅谈如何提高小学生阅读素养

阅读是语文的核心素养,也是一个人的核心素养的重要组成部分。在小学语文课堂内外,都应该致力于多元引导,关注阅读主体,努力营造阅读氛围,尽力寻找阅读资源,当好学生阅读榜样,传授阅读方法,提高小学生阅读素养。     

一种串联系统可靠性指标的Bays估计

本文运用Bayes及多层Bayes方法对具有冷贮备部件串联系统的失效率,可靠度与平均失效时间进行了估计,最后通过随机模拟对这两种估计进行了比较分析.     

多元智能理论指导下的信息技术与课程整合

本文阐述了多元智能理论的基本内涵和信息技术与课程整合的本质,分析了运用多元智能理论指导信息技术与课程整合的可行性,探索了在多元智能理论指导下实施信息技术与课程整合的基本途径。本文认为在多元智能理论与建构主义理论相结合的指导下实施信息技术与课程整合,有利于促进多元智能的发展,培养具有解决实际问题能力和创新能力的新型人才。     

逻辑数学智能及其对教育的启示

加德纳提出的多元智能理论是关于人类认知范畴最完整的论述。其中的逻辑数学智能是指有效运用数字和推理的能力，强调了运用逻辑数学思维解决问题的能力。每个人身上都蕴藏着不同量的数学潜能，教师的职责就是创设条件，让学生展现自己的逻辑数学潜能，提高运用数学思维解决实际问题的能力。     

显微手术治疗颅内多发动脉瘤

对47例经造影及手术证实的颅内多发动脉瘤进行显微手术治疗。术后恢复工作42例,轻残2例,重残1例,死亡2例。结果表明,术前识别破裂动脉瘤和术中先处理破裂动脉瘤十分重要。尽可能一期手术处理完所有多发动脉瘤,对于不能一期手术的多发动脉瘤,应先期处理破裂动脉瘤,然后二期手术处理未破裂动脉瘤。血管造影为单发动脉瘤,而术中所见与CT和造影的部位不相符时,应想到多发动脉瘤之可能。