大学物理 第22卷 焦距f与转动角速度o的关系,从而求得凹面镜焦距 与角速度的经验公式,能培养实验者分析现象和处理参考文献 数据的能力 1J贾起民,郑永令.力学上册/M].上海:复旦大学出版 4)使用半导体激光器为光源,利用其单色、方向 社,1989.116~117 性和扩束小等特点,使实验测量精确度提高,使学生体[2]章志鸣,沈元华,陈惠芬光学[M].北京高等教育出版 会半导体激光器在物理实验中的作用 社,1995 总之,通过这样一个实际综合性设计实验,有利于31谷超豪,数学词典[M]上海:上海辞书出版社,1992 培养学生的创新能力和实验能力,是值得推荐的好实 l82~183 A new kind of rotating liquid ex periment introducing a kind of research ul physical experiment BAO YIliang, HUANGJi, LU Shen-long Department of Physics, Fudan Ur Abstract A new kind of rotating liquid experiment is introduced, through which, we can observe the phenomenon of centrif ugal force, measure the acceleration due to gravity, investigate the linking of the focal distance in the optical system of the rotating liquid and the angular speed @, and observe the linking of the image produced by this system and the speed of rotation Key words rotating liquid; centrif ugal force; rotating parabolic surface; acceleration due to grav- ity, optical system (上接10页) The lattice vibra tion of one dimensional diatomic chain under different boun dary con ditions TIAN Qiang, ZHANG Qry Department of Physics, Beijing Normal University, Beijing, 100875, China) Abstract The lattice vibration of one-dimensional diatomic chain is analyzed under the free bound- ary condition and the stationary-wave boundary condition. The vibrational mode and dispersion relation are the same with those under the periodic boundary condition. In conclusion, the results of lattice vr bration under the periodic boundary condition are al so true for other boundary conditi Key words lattice vibration; boundary condition; vibrational mode, dispersion relation (上接22页) 1994,13(4):30~31 1983.663~678 3]奥齐西克MN.热传导[M]北京:高等教育出版社,[4]郭仲衡张量[M]北京:科学出版社,1988142. An analysis of thermal diff usivity in anisotropic materials XINGJirrhua Department of Physics, Changshu College, Changshu, Jiangsu, 215500, China) Abstract: The thermal diffusivity of anisotropic materials is anal yzed. The relation bet ween ther- ffusivity to heat diff usion along arbitrary direction and principal thermal diff usicity is derived. A method to determine thermal diffusivity to heat diffusion along arbitrary direction is presented Key words anisotropic sample; thermal diffusivity; principal axes 2 01995-2005 Tsinghua Tongfang Optical Disc Co, Ltd. All rights reserved.焦距 f 与转动角速度ω的关系 ,从而求得凹面镜焦距 与角速度的经验公式 ,能培养实验者分析现象和处理 数据的能力. 4) 使用半导体激光器为光源 ,利用其单色、方向 性和扩束小等特点 ,使实验测量精确度提高 ,使学生体 会半导体激光器在物理实验中的作用. 总之 ,通过这样一个实际综合性设计实验 ,有利于 培养学生的创新能力和实验能力 ,是值得推荐的好实 验. 参考文献 : [1 ] 贾起民 ,郑永令. 力学 上册[ M ] . 上海 :复旦大学出版 社 ,1989. 116～117. [ 2 ] 章志鸣 ,沈元华 ,陈惠芬. 光学[ M ] . 北京 :高等教育出版 社 ,1995. [ 3 ] 谷超豪 ,数学词典[ M ] . 上海 :上海辞书出版社 ,1992. 182～183. A ne w kind of rotating liquid experiment ———Introducing a kind of researchf ul physical experiment BAO Yi2liang ,HUAN G Ji ,L U Shen2long (Department of Physics , Fudan University , Shanghai , 200433 ,China) Abstract : A new kind of rotating liquid experiment is introduced , through which , we can observe the phenomenon of centrifugal force , measure the acceleration due to gravity , investigate the linking of the focal distance in the optical system of the rotating liquid and the angular speedω, and observe the linking of the image produced by this system and the speed of rotation. Key words : rotating liquid ; centrifugal force ; rotating parabolic surface ; acceleration due to grav2 ity ; optical system (上接 10 页) The lattice vibration of one2dimensional diatomic chain under different boundary conditions TIAN Qiang ,ZHAN G Qi2yi (Department of Physics ,Beijing Normal University ,Beijing ,100875 ,China) Abstract :The lattice vibration of one2dimensional diatomic chain is analyzed under the free bound2 ary condition and the stationary2wave boundary condition. The vibrational mode and dispersion relation are the same with those under the periodic boundary condition. In conclusion ,the results of lattice vi2 bration under the periodic boundary condition are also true for other boundary conditions. Key words:lattice vibration ;boundary condition ;vibrational mode ;dispersion relation (上接 22 页) 1994 ,13 (4) :30～31. [3 ] 奥齐西克 M N. 热传导[ M ] . 北京 :高等教育出版社 , 1983. 663～678. [ 4 ] 郭忡衡. 张量[ M ] . 北京 :科学出版社 ,1988. 142. An analysis of thermal diff usivity in anisotropic materials XIN G Jin2hua (Department of Physics , Changshu College , Changshu , Jiangsu , 215500 ,China) Abstract : The thermal diffusivity of anisotropic materials is analyzed. The relation between ther2 mal diffusivity to heat diffusion along arbitrary direction and principal thermal diffusicity is derived. A method to determine thermal diffusivity to heat diffusion along arbitrary direction is presented. Key words:anisotropic sample ; thermal diffusivity ; principal axes 03 大 学 物 理 第 22 卷 © 1995-2005 Tsinghua Tongfang Optical Disc Co., Ltd. All rights reserved