对二元溶液体系共沸溶液共沸点的再探究

共沸溶液很早就被人们所发现并取得了大量的实验数据,然而,这种现象的理论研究却很少。本文从理论上推导出二元体系共沸液的共沸点与外压、组成和组分沸点的定量关系式,并据此计算了二元体系共沸溶液常压下的共沸点,结果与文献的实验数据有相当好的一致性。本文还对二元体系共沸溶液的存在范围,共沸点相对单组分沸点高低的定性判定作了分析,从而为共沸溶液的研究和应用提供了理论依据。     

“足”部与“走”部同声符字考——兼论义近形符通用

义近形符通用现象往往被认为不是时间关系,而是一种文字未定型时的静态的地域差异的表现。通过对《说文》《玉篇》的静态和动态的考察,可知足部、走部中声符相同的字也有通用的情况,但并非全是通用,亦有对立。某些义近形符通用是文字历时演变的一种表现。义近形符通用具有时代性。     

The first joint BASES/BASEM Conference

The purpose of this study was to evaluate the dietary practices of soccer players of different ages. The diets of the members of four soccer teams (mean ages of 14.0, 15.0, 16.6 and 20.9 years, respectively) were examined. Our results show that the caloric intake per kilogram of body mass was significantly higher among the youngest players when compared with the adult players (P 相似文献   

Effects of game location and final outcome on game-related statistics in each zone of the pitch in professional football

Abstract

The aim of this large-scale study of elite professional football teams was to identify the independent and interactive effects of game location and final outcome on football game-related statistics according to the zone of the pitch in which they occurred. The sample consisted of 1900 games played over five seasons (from 2003–2004 to 2007–2008) of the Spanish Professional Football League. Factor analysis with principal components was applied to the game-related statistics recorded from the games, which limited the analysis to four factors (Factor 1: Turnovers in zone 5.2 and Crosses in zone 4; Factor 2: Goals and shots in zone 5.1, Turnovers in zone 4, and Ball recover in zone 2; Factor 3: Goals and shots in zone 5.2; and Factor 4: Turnovers in zone 5.1). Zone 2 was between the defensive semi-circle area and midfield circle, Zone 4 was between the midfield circle and offensive semi-circle area, Zone 5.1 was the offensive goal area, and Zone 5.2 was the offensive small area). A mixed linear model was applied to identify the effects of game location and final outcome on the previously identified factors. Game location and final outcome main effects were identified for all factors, with home and winning teams having better values. The interaction Location×Outcome was only significant for Factor 4 (Turnovers in zone 5.1). When playing at home, teams had higher frequencies for all analysed variables, probably resulting from home advantage factors such as facility familiarity and/or crowd. Additionally, winning teams’ exhibited different and consistent profiles from drawing and losing teams, mainly discriminated by their ability to recover the ball in Zone 2 and to organize the offence using penetrative passes to Zones 5.2 and 5.1 to increase the number of shots and consequently goals. The trends identified may provide important information for modelling high-level performances.     

民族地区居民体育健康发展水平的调查分析

利用广西少数民族人口健康素质变动情况抽样调查数据，运用主成分分析方法，揭示了2001年广西9个聚居少数民族居民人口体育健康差异，确立该地区人口体育健康综合评价指标。在此基础上评价该地区人口体育健康发展状况，并对素质差异进行归纳和总结。     

异形词规范中不容轻视的一种潜规则--偏旁同化

"偏旁同化"是异体词规范中不容轻视的一种潜规则,在现代汉语异形词产生发展的过程中,这种潜规则已经起了或正在起着重要的作用.信息时代迫切需要汉语规范化,<现代汉语异形词规范词典>的出现无异于及时甘霖,同时,该词典的规范结果更证实了同化规律的存在.依据词典本身提出的异形词规范三原则(通用性、理据性、系统性),加上"偏旁同化"原则,可以前瞻性地规范一些异形词.     

一致拓扑度量下集值映射弱有效解的本质连通区

文章主要讨论了某些集值映射在一致拓扑度量下的稳定性并证明了其本质连通区的存在性。     

偏振光的矩阵描述

偏振光用矩阵方法来描述,为用计算机来计算偏振光的有关问题提供依据,也加深对偏振光偏振态的认识。     

云南烤烟评吸质量与化学成分的关系研究

分析云南烤烟总糖、还原糖、总氮、烟碱等化学成分的含量,并对香气质、香气量、浓度、余味等评吸质量进行专家评吸打分。化学成分与评吸质量的相关分析表明,与评吸质量关系密切的化学成分主要为糖组分和含氮化合物。香气质、香气量、评吸总得分与化学成分的逐步回归分析表明,化学成分对香气质作用的大小为:挥发碱>总糖>总氮>总灰分,对香气量作用的大小为:总灰分>总糖,对总体评吸质量的作用大小为:总糖>总氮>总灰分>蛋白质>还原糖>钾。     

状态形容词的韵律特征

状态形容词在功能上不同于性质形容词,韵律上也和性质形容词不同。状态形容词是在性质形容词基础上形成的,在使用频率上,性质形容词的常用性使其在韵律上形成"重轻"的格式,而状态形容词韵律格式是"轻重",这是由状态形容词的自身特点决定的。