( 2 ) the gravitational toy model in canonical ensemble is also studied under the regime of generalized statistical mechanics . we find that a region of negative specific heat describing the character of gravity also exists in canonical ensemble , which is remarkably distinguished from the result of traditional statistical mechanics that the specific heat must be positive in that ensemble , implying that the gravitating system may also be described by canonical one ( 2 )在正则系综中，我们同样根据广义统计力学对引力toy模型进行了研究，发现也会出现类似于微正则系综中的负比热现象，这明显区别于传统的统计力学中比热必须非负的结论，从而得出在tsalllis统计下正则系综也可以描述引力系统的结论。
The research interests in this team are nonlinear optics at low light intensities , including photorefractive nonlinear optics ( photorefractive materials , effects and their applications ) , optical storage materials , nonvolatile optical recording technology and mechanics with high recording rates , high data density and high data transfer rates , nonlinear dispersive system and the dynamic propagation properties of photons in such dispersive system , and nonlinear optical properties of phasonian systems such as electromegnetically induced transperancy 本实验室目前从事弱光光学非线性方面的研究：主要包括光折变非线性材料、效应以及应用；超快超高密度光存储材料、非挥发存储技术及其机理；非线性色散系统以及光子在非线性色散系统中的传播动力学；量子相干系综中的非线性光学性质如电磁感应透明等几个方面的研究。
Abstract : the hot wire anemometer and the ensemble average method are used to measure and study the dispersion turbulent transient feature in a closed cylindrical explosion bomb . the comparison of the dispersion turbulent parameters from different shapes of closed explosion bombs is presented . the relation between errors and numbers in dispersion turbulent measurement with the ensemble average metod is discussed 文摘:采用热线风速仪和系综平均法测定和研究了封闭圆柱形粉尘爆炸罐内扬尘湍流的瞬态特性，并与球形爆炸容器内已测定的扬尘湍流瞬态特性进行了比较，对系综平均法用于扬尘湍流的测量误差与测量次数的关系进行了探讨。
Abstract : on the basis of equal probability principle , boltzmann statistics and ensemble statistics , this paper has derived the statistical distribution function on multimember system in the quasi - independent particles and obtained the equivalence between boltzmann statistics and ensemble statistics for multimember system 文摘:利用平衡态统计物理的等概率原理,玻耳兹曼统计法和系综统计法,导出在平衡状态下多种近独立粒子系统的粒子数分布.结果表明,对于宏观系统而言,玻耳兹曼统计和系综统计是等价的
