试论健美操选项课的艺术性

采用献资料及教学实践等研究方法，从健美操的准备艺术、表演艺术、语言艺术、组织艺术、环境艺术、评价艺术等六个方面对健美操选项课的艺术性作了初步探讨。最后提出了健美操选项课应不断提高其艺术观赏性，以求为丰富和完善健美操选项课服务。     

浅论影视歌曲在高校声乐教学中的运用

影视歌曲是影视表演艺术中重要的组成部分。量身定制的创作方法使影视音乐和剧情配合,相得益彰,而且歌曲旋律优美动听、舒心舒畅,歌词简单易懂,朗朗上口、中心主题旗帜鲜明。在教学实践中合理利用影视歌曲资源,可以取得较好的教学效果。     

电子图书文件格式标准化现状及其思考

电子图书的标准化问题已经成为制约电子图书产业发展的重要障碍。文章分析了电子图书文件格式的现状及影响，提出了制定电子图书标准化格式过程中应注意解决的几个问题。     

移动通信中的多谱勒频偏估计方法

针对几种多普勒频偏估计方法,分别为对数包络法、自相关函数法、各阶电平通过率法和均方相位差分法,在理论上分析了瑞利信道中它们的估计原理和估计偏差,说明了这些估计方法各自的适用场合.同时推导了多普勒频偏估计器的CRB (Cramer Rao bound),并且提出了一种新的利用二阶多项式拟合的修正方法以提高多普勒频偏估计精度.算法验证采用门特卡罗计算机仿真,结果表明,相对于原始估计方法,拟合修正后的方法估计性能得到了较大的提高.     

B16黑色素瘤移植模型的建立

用不同密度B16小鼠黑色素瘤细胞接种于小鼠前腋部皮下,观察接种细胞密度与肿瘤生长、肿瘤出现以及与小鼠存活时间的关系.实验结果表明B16细胞的致瘤率为100%,肿瘤的出现、生长及小鼠存活时间在各个接种密度之间存在差异.     

利用反相高效液相色谱法测定硝基多环芳烃的正辛醇－水分配系数和水溶解度

用反相高效液相色谱法测定了１５种致突变硝基多环芳烃的正辛醇－水分配系数和水溶解度，所得结果分别与摇瓶法和动态联柱法测定值相符较好。     

电子商务中的电子协作

During the transformation from business electronization to Electronic Commerce,electronic collaboration is a core management technology.Based on the two electronic collaboration models inside and outside an enterprise,this paper analyzes the environment of electronic collaboration.The characters and functions of the supporting system are mentioned,too.     

Montgomery multiplication over rings

Montgomery multiplication of two elements a and b of a finite field F_q is defined as abr^-1 where r is a fixed field element in . In this paper we define Montgomery multiplication of elements a(x) and b(x) in a polynomial ring modulo the ideal generated by a reducible polynomial f(x). We then show that Montgomery multiplication over a field represented by a polynomial ring modulo an irreducible pentanomial can be performed more efficiently in terms of time delay by embedding the field in a quotient of a polynomial ring modulo a reducible trinomial. The trinomial has a degree that is slightly higher than that of the pentanomial, thereby increasing the number of gates in the multiplier by a small amount.     

DNA序列的3D图形表示（英文）

本文介绍一种新的DNA序列的三维图形表示，它可以避免相应空间图形的交叉和重叠。该图形表示的好处还在于，它仅仅有两种需要计算的可能情况，而在其它的三维表示中，往往有三种需要计算的情况。究其应用，我们对两种可能产生的表示情况，通过计算十二种不同物种间编码序列对应的L/L矩阵产生的正规特征值，构造一个2-维向量来检测上述物种间的相似性与非相似性。     

Osteogenic effects of antihypertensive drug benidipine on mouse MC3T3-E1 cells in vitro

Hypertension is a prevalent systemic disease in the elderly, who can suffer from several pathological skeletal conditions simultaneously, including osteoporosis. Benidipine(BD), which is widely used to treat hypertension, has been proved to have a beneficial effect on bone metabolism. In order to confirm the osteogenic effects of BD, we investigated its osteogenic function using mouse MC3 T3-E1 preosteoblast cells in vitro. The proliferative ability of MC3 T3-E1 cells was significantly associated with the concentration of BD, as measured by methylthiazolyldiphenyl-tetrazolium bromide(MTT)assay and cell cycle assay. With BD treatment, the osteogenic differentiation and maturation of MC3 T3-E1 cells were increased,as established by the alkaline phosphatase(ALP) activity test, matrix mineralized nodules formation, osteogenic genetic test,and protein expression analyses. Moreover, our data showed that the BMP2/Smad pathway could be the partial mechanism for the promotion of osteogenesis by BD, while BD might suppress the possible function of osteoclasts through the OPG/RANKL/RANK(receptor activator of nuclear factor-κB(NF-κB)) pathway. The hypothesis that BD bears a considerable potential in further research on its dual therapeutic effect on hypertensive patients with poor skeletal conditions was proved within the limitations of the present study.