民族声乐演唱中的七个基本问题

民族声乐演唱中有七个问题是基础性的问题,弄清这七大问题中的有关概念以及概念之间的内部联系,是迈向民族声乐的教学和演唱的一条成功的大道.反之.如果不能弄清这些基本问题,学习民族声乐就会寸步难行,甚至产生各种嗓音疾病.这七大基本问题分别是:一、民族声乐演唱的基础--歌唱的气息,二、民族声乐演唱的标尺--共鸣,三、民族声乐演唱的关键--打开喉咙,四、民族声乐演唱的核心--咬字吐字,五、民族声乐演唱的难点--真假声结合,六、民族声乐演唱的目的一声情并茂,七、民族声乐演唱的必然阶段--字声结合.     

The relationship between muscle cross-sectional area and strength in various isokinetic movements among soccer players

Abstract

The aim of the present study was to examine the relationships between muscle cross-sectional area (CSA) and muscular strength in terms of knee extension and flexion, hip extension and flexion, and hip abduction and adduction among well-trained soccer players. Fourteen university soccer players participated in the study, who had previously been divided into two groups based on ability (Group A: above-average ability; Group B: average ability). Maximal isokinetic and concentric muscular strength was measured in knee extension/flexion, hip extension/flexion and hip abduction/adduction using an isokinetic dynamometer at 1.57 and 4.19 rad·s^?1 (3.14 rad·s^?1) in both the dominant and non-dominant leg. The CSAs of the thigh, gluteus muscles and iliopsoas muscles were calculated based on magnetic resonance imaging. There was no significant difference between the two groups in muscle CSA and isokinetic strength. Although there were some statistically significant differences between the dominant and non-dominant leg in terms of CSA and strength (P<0.05–0.01), these were small and negligible. Apart from a non-significant relationship between the CSAs of the adductor muscles and hip adductor strength (r<0.26, n.s.), the CSA of the other muscle groups correlated with maximal isokinetic strength (r=0.38–0.64, P<0.05). These results suggest that no difference in muscle characteristics (in terms of muscle CSA and strength) was apparent among well-trained soccer players, even between the dominant and non-dominant leg. There is also a case that the anatomical function of a single (or group of) muscle(s) may not be reflected by the strength—CSA relationship depending on the movements (such as hip adduction-adductor muscle CSA). Thus, further studies are required to develop methods to assess neuromuscular function in relation to muscle morphology among soccer players.     

学生融入音乐课堂的思考

现代中学生普遍喜爱流行音乐,对于音乐教材中的古典音乐、传统音乐比较淡漠。流行音乐特色鲜明,曲调新潮,能抒发情感,缓解压力,引发学生共鸣。它不仅会对中学生的学习及身心健康产生影响,同时从另一层面也影响着学校的音乐教学活动。中学音乐教师应与时俱进,循循善诱,正确引导中学生有选择地欣赏流行音乐,通过精心挑选一些优秀流行音乐作品来激活音乐课堂,让优秀流行音乐给中学生既带来快乐又带来积极健康的影响。     

歌声中的高音技巧初探——承上启下的中声区

在声乐学习中,深位置的呼吸和良好的气息支持,是学习声乐者首先要解决的问题,通过横膈膜有效的控制使气息作用于声带,声带的开合使五大共鸣腔体积极地运动,从而产生辉煌并富有穿透力的高音,这是每一位学习唱歌的人需要解决的重点和难点之一。     

谈歌唱时几种不正确声音及纠正方法

本文通过对几种不正确声音的纠正，使读者扼要地了解在学习歌唱中所遇到的一些困难和问题及解决办法，使他们在歌唱 中树立正确的声音要领，从而达到完美的艺术效果。     

哲学审视中的社会谣言

社会谣言是社会生活中最常见的社会现象之一。谣言的生命在于流传。思想上的共鸣使人们信谣、传谣。社会谣言在本质上是众多个体的评价活动通过传播所形成的意见，是社会评价活动的结果。谣言与谎言、传闻等不同。社会谣言往往在流传中形成和运动。社会谣言对现存社会秩序具有巨大的破坏力。社会当局反对社会谣言。     

计算机数值模拟实验设计Ⅱ——强激光脉冲对低密度等离子体通道中电子的共振加速

本文以计算机数值模拟方法,设计了一个新的近代物理实验:研究强激光脉冲对低密度等离子体通道中电子的共振加速。     

普通物理设计性实验改革初探

加强基础理论，改进传统设计性实验的内容与方法，用Office软件处理数据，提高学生综合实验能力。     

Planum temporale asymmetry: In-vivo morphometry affords a new perspective for neuro-behavioral research

High-resolution magnetic resonance (MR) imaging today allows the in vivo quantification of the surface area of the cortex covering the planum temporale and permits assessment of the direction and degree of individual left-right asymmetry of this structure. This methodologic advance is promoting new studies on the biological mechanisms of anatomic and functional lateralization and on the structural accompaniments of disorders such as developmental dyslexia. It is important to stress that studies must agree on the definition and measurement of planum asymmetry, and we review our definition and its justification in the present article.Data obtained from normal subjects supported the assumption that planum (a)symmetry underlies functional lateralization. Thus, familial sinistrality predicted for symmetry of the planum in all eight left-handers studied. The pattern of planum symmetry in the normals was similar to that found in the post mortem studies of dyslexic individuals. Insofar as hand preference and developmental dyslexia are in part genetically transmitted, we suggest that planum symmetry may represent an inherited condition as well. Further-more, even though planum symmetry is part of the anatomic substrate of developmental dyslexia, it is unlikely that it represents a form of developmental anatomic pathology.     

光泵磁共振实验评述

对光磁共振实验的主要内容进行了系统的评述，包括实验中水平方向的磁场、光抽运信号的变化、光泵磁共振信号观察时光抽运信号混杂出现和谐波共振的情况、gF因数的测量方法，以及用光磁共振和光抽运信号测地磁场的方法。