浅论萨克斯管吹奏中常遇的问题及解决方法

萨克斯管吹奏中常出现音色概念、呼吸、指型、口型等方面的错误，阐述了其解决的方法，同时从理论的角度分析了原因，以帮助吹奏掌握正确、规范的萨克斯管吹奏方法。     

灼灼其华的生命力——评王安忆长篇小说《桃之夭夭》

王安忆的新制长篇<桃之天夭>,通过旧艺人笑明明及其女儿郁晓秋两代上海女性的命运,演绎了俗世凡人倍受磨难却永远屹立的旺盛充沛的生命力,并以此揭示了一个独特的心灵世界.文本保持了细腻、平实、温婉、柔软而坚毅的风格和情调.作为都市生活的民间叙述和个人化叙述,王安忆日益成熟了.     

试论外币报表折算方法的选择

作为当今国际会计领域公认的三大难题之一，随着经济全球化的迅猛发展，外币报表折算方法的选择显得越来越重要，这也成为了目前会计理论界和实务界一直探讨的焦点之一。在时态法和现行汇率法的争议中，现行汇率法暂时占据上风，也成为我国企业外币报表折算方法的现行选择。     

森林面积分布系统的最优控制存在性问题

本文研究森林面积分布系统的最优控制问题。本文将林木总和长消率作为控制变量，以“范数最小”来衡量其最优性，利用空间Ｌ＾２（０，Ｔ）Ｔ〉０的自反、光滑和严格凸性，给出了森林面积分布系统最优控制的一个存在性定理。     

钠光谱分析中运算方法的改进

本文对近代物理实验项目《钠原子光谱的拍摄与分析》的传统教学内容提出了改进,并将微机引入了实验教学。     

A new indolic antiauxin, α-(5,7-dichloroindole-3-)isobutyric acid: its chemical synthesis and biological activity

Summary A new potent antiauxin, -(5,7-dichloroindole-3-)isobutyric acid has been synthesized and shown to inhibit auxin-mediated elongation ofAvena coleoptiles and to stimulate root growth of rice seedlings. Its activity is stronger than -(p-chlorophenoxy)isobutyric acid and is comparable to that of 2,3,5-triiodobenzoic acid, which are typical antiauxins.     

On some significance tests in cluster analysis

We investigate the properties of several significance tests for distinguishing between the hypothesisH of a homogeneous population and an alternativeA involving clustering or heterogeneity, with emphasis on the case of multidimensional observationsx ₁, ...,x _n ^p . Four types of test statistics are considered: the (s-th) largest gap between observations, their mean distance (or similarity), the minimum within-cluster sum of squares resulting from a k-means algorithm, and the resulting maximum F statistic. The asymptotic distributions underH are given forn and the asymptotic power of the tests is derived for neighboring alternatives.     

蓄电池容量自动测试仪

本文根据国标《CB5008.1～3—85》的规定,设计了一种蓄电池容量自动测试仪.该仪器利用8位单片计算机进行控制,完成测试过程中的自动恒流、自动测量时间和温度、自动进行数据处理、自动停机等功能.它的优点是操作简单,测量精度高,成本低.本文介绍了蓄电池容量的测量原理和计算方法,对单片机的硬件和软件系统都做了全面的叙述.     

Influence of bistramide A on the twitch tension in rat atrial heart muscle

Bistramide A, a new toxin isolated from the UrochordateLissoclinum bistratum Sluiter, was applied to rat auricular heart muscle bundles. At a stimulation frequency of 0.2 Hz, the toxin induces a dose-dependent reduction of the stimulated twitch tension force; it decreases and shortens the duration of the plateau and the slow repolarizing phase of the action potential. In the control solution, switching from a stimulation frequency of 0.2 Hz to 1 Hz decreases the force with which a positive potentiation develops either at a maintained high frequency or after switching from 1 Hz to 0.2 Hz. Bistramide A reduces both the force evoked at 1 Hz and the potentiation. The data suggest that Bistramide A blocks Na⁺ conductance; inhibits Ca⁺⁺ channels in a time-and frequency-dependent manner; reduces Na⁺–Ca⁺⁺ exchange activity; but does not modify the ability of the sarcoplasmic reticulum to be refilled although the rate of Ca⁺⁺ accumulation is decreased.     

论明清石湾陶艺的美学特色

明清是石湾陶艺创作风格、艺术特色的奠基时期。明清石湾陶艺注重表现,富有生活气息,简约质朴,豪放自然,尤其在人物眼神与衣纹的刻划、“素胎烧制”等艺术表现技巧方面所作出的探索,终经后来历代艺人的发扬光大,已成为今天石湾陶艺所特有的“有意味的形式”,并展示出强烈的艺术魅力。