论贝里奥小提琴协奏曲中的运弓要求

运弓部位的恰当安排,不仅能准确体现出作品的音乐要求,同时也能带来视觉上的满足,而对每个学生来说,更是拓宽演奏技法,提高演奏素养的重要内容。在贝里奥的小提琴协奏曲的教学中,对右手运弓的技法有着特殊而又细致的要求,运弓部位的安排须根据作品的音乐表现和旋律的走向而确定。在我们所见到的许多业余学生的演奏中,通常对运弓部位的区分没有严格的要求,有的是不分音符的时值,千篇一律拉锯式的进行。运弓不分长短,强弱没有区别,还有的是由于对作品的情绪和旋律的走向不清楚,而把运弓的部位安排错了,该用上半弓的却用了下半弓,该用弓根的却用了中弓或弓尖,运弓部位的不明确使音乐的表现明显地受到了影响。     

关于平方根整数部分的几个等式

解决了有关平方根整数部分的几个问题.     

关于Diophantine方程x3-1=Dyn

设D是无平方因子正整数.本文证明了:当D不能被形如6k 1之形素数整除时,方程,-1=Dyn仅当D=17时有正整数解(x,y,n)=(18,7,3)适合n＞2.     

Attitudes of Business Faculty Towards Two Methods of Collecting Teaching Evaluations: Paper vs. Online

Business professors were surveyed to determine their attitudes towards two methods of collecting students' teaching evaluations of faculty--the traditional paper-and-pencil method conducted in class and the online method conducted via the Internet. Faculty preferred the traditional paper method, mainly because they believed it would produce a higher and more accurate response than the online method. Faculty characteristics were examined to determine whether they were related to attitudes towards the online method of collecting teaching evaluations. No characteristics were found to be significantly associated with attitudes towards the online method. Suggestions for future researchers are offered.     

赵都邯郸故城考古发现与研究

赵都邯郸故城是在现代考古学出现之后，才逐步被发现并得到认识的。根据原有考古资料，特别是近10多年来大量新的考古发现，进一步对战国至两汉时期赵都邯郸城的地理位置与范围、城市兴衰与变迁、城区布局与功能、陵墓分布与特点、人口数量与经济等问题作了系统地分析和研究，提出了一系列新的认识或推断。     

关于指数Diophantine方程a~x+b~y=c~z的一个猜想

设r是大于1的奇数,m是偶数,U_r和V_r是适合的整数,证明了:当r=3(mod4),m=2(mod4),m>r/Ⅱ且c是素数方幂时,方程口。a~x+b~y=c~x仅有正整数解(x,y,z)一(2,2,r).     

化学反应的△H与化学反应的可能性

本文根据热力学原理分析了由化学反应的△H判断化学反应方向的条件.找出了由化学反应式估计△S的符号的一般规律.从热力学和动力学的角度分析了△H与化学反应速度率的关系,以及△H与温度对化学反应限度的影响.     

Stimulant medication and reading performance: follow-up on sustained dose in ADHD boys with and without conduct disorders.

The study examined the sustained effects of methylphenidate on reading performance in a sample of 42 boys, aged 8 to 11, with attention deficit-hyperactivity disorder (ADHD). Two subgroups were formed based on the presence or absence of co-occurring conduct disorders. Subjects were selected on the basis of their positive response to methylphenidate as determined in a series of original medication trials (Forness, Cantwell, Swanson, Hanna, & Youpa, 1991). For the purpose of this study, subjects were placed on their optimal dose of medication for a 6-week period and then tested on measures of oral reading and reading comprehension equivalent to those used in the original trials, retested after a week without medication (placebo), then tested again the following week after return to medication. Only the subgroup with conduct disorders responded, and this response was limited to reading comprehension improvement in only those subjects who also demonstrated improvement in oral reading on original trials. No response differences were found between subjects with or without learning disabilities.     

关于酉Euler函数的Subbarao猜想

对于正整数n，设ψ^*(n)是酉Euler函数．本文证明了：当n是幂数时，如果n=1(mod ψ^*(n))，则n必为素数方幂．