积分方程逆算子的界

讨论第二类Fredholm积分方程数值解的后验误差,得到逆算子（I-K）^-1的上、下界估计式,该式易计算且较精确．     

Leg soft tissue position and velocity data from skin markers can be obtained with good to acceptable reliability following heel impacts

Quantifying soft tissue motion following impact is important in human motion analysis as soft tissues attenuate potentially injurious forces resulting from activities such as running and jumping. This study determined the reliability of leg soft tissue position and velocity following heel impacts. A grid of black dots was applied to the skin of the right leg and foot (n = 20). Dots were automatically detected (ProAnalyst^®) from high-speed records of pendulum and drop impacts. Three trained measurers selected columns of dots on each participant for analysis; one measurer 6 months later. Between- and within-measurer differences in kinematic variables were all relatively small (<0.8 cm for position; <3.7 cm/s for velocity) between-measurers and (<0.5 cm for position; <2.6 cm/s for velocity) within-measurer. Good (coefficients of variation (CV) ≤ 10%) to acceptable (CV > 10% and ≤20%) reliability was shown for 95% of the position measures, with mean CVs of 10% and 11% within-measurers and between-measures, respectively. Velocity measures were less reliable; 40% of the measures showed good to marginal (CV > 20% and ≤30%) reliability. This study established that leg soft tissue position data from skin markers could be obtained with good to acceptable reliability following heel impacts. Velocity data were less reliable but still acceptable in many cases.     

无扰Polysilane链的热力学函数

采用旋转异构态模型和二级相互作用近似，计算了无扰Ｐｏｌｙｓｉｌａｎｅ链的内能、自由能和熵，讨论了它们与链长和温度的关系     

元代下层文人选择杂剧的心态试探

元代下层文人对杂剧艺术的选择，促进了杂剧的大繁荣。他们在选择杂剧的过程中，或隐或显地呈现出了各种心态，主要有宗教的解脱心态、生存的边缘化心态、娱乐的自适心态和价值的凸现心态。     

H2 and H∞ optimal model reduction using genetic algorithms

The mathematical modeling of most physical systems, such as aerospace systems, heat processes, telecommunication systems, transmission lines and chemical reactors, results in complex high order models. The complexity of the models imposes a lot of difficulties in analysis, simulation and control designs. Several analytical model reduction techniques have been proposed in literature over the past few decades to reduce these difficulties. However, most of the optimal techniques follow computationally demanding, time consuming, iterative procedures that usually result in non-robustly stable models with poor frequency response resemblance to the original high order model in some frequency ranges. Genetic Algorithm (GA) has proved to be an excellent optimization tool in the past few years. Therefore, the aim of this paper will be to use GA to solve H₂ and H_∞ norm model reduction problems, and help obtain globally optimized nominal models.     

皖北方言的动词重叠式“VV的”

皖北方言＂VV的＂具有一系列不同于普通话＂VV的＂句法表现。＂VV的＂中的＂的＂必不可少,＂VV的＂不能变换为＂V一下（一会儿）＂,不带宾语,重叠形式的第二个音节不轻读,可以前加＂别＂或＂没有＂进行否定,不用于非现实情态,具有很低的及物性。＂VV的＂的基本语法意义是侧重动作行为的持续、反复,凸显动作行为的进行是其派生语法意义。除此之外,＂VV的＂具有生动性。＂VV的＂的某些句法特征与现有的关于汉语南北方言动词重叠的有关概括并不完全一致。     

Correction Galerkin Method For Non—Smooth Fredholm Equations

In this paper, we present a new more efficient Galerkin approximation method for a class of non-smooth Fredholm integral equations and show that this method is not only a high order method but also an adaptive one.     

体能主导类项群田径、举重运动员下肢蹬伸最大力量特征分析

利用文献资料、实验测试等研究方法，对体能主导类项群不同运动项目及不同竞技水平运动员下肢蹬伸最大力量发展情况进行分析。研究发现，优秀组男女运动员以及一般组男运动员存在着项目间差异，一般组女运动员蹬伸最大力量未见明显的项目间差异；不同竞技水平间，只有男子举重运动员存在显著性差异，而其他运动项目的不同竞技水平运动员间，蹬伸最大力量发展水平未见显著性差异。