| 1. | A method for generate first integral of hamilton system
系统第一积分的一种方法 |
| 2. | The proof about the first integral mean value theorem
关于积分第一中值定理的证明和推广 |
| 3. | First integral and integral invariants of relativistic birkhoff systems
系统的第一积分和积分不变量 |
| 4. | Connexion of first integrals with particular solution to the variational equations for birkhoffian systems
系统的第一积分与其变分方程特解的联系 |
| 5. | The analytical expressions of constraint force , internal force on cross section , and flexibility of the rod are obtained via the first integrals
利用方程的初积分导出约束力、截面内力及挠性线的解析表达式。 |
| 6. | By the first integral method and properties of integral depending on a parameter , the necessary and sufficient condition on the existence of dead core solution for the boundary value of a class of nonlinear ordinary differential equations has been specifically constructed
应用首次积分法并结合含参变量积分的性质，具体构造了一类二阶非线性常微分方程边值问题存在非负死角解的充分必要条件 |
| 7. | Abstract : by the first integral method and properties of integral depending on a parameter , the necessary and sufficient condition on the existence of dead core solution for the boundary value of a class of nonlinear ordinary differential equations has been specifically constructed
文摘:应用首次积分法并结合含参变量积分的性质，具体构造了一类二阶非线性常微分方程边值问题存在非负死角解的充分必要条件 |
| 8. | | at the end of 50 ' s in 20 centuries , six countries of western europe strengthen the economic contact among the nations in order to match with the united states mutually , and build up the first integral whole with economic district in the world - european economic common body
20世纪50年代末,西欧六国为加强国家间的经济联系以便与美国相抗衡,建立了世界上第一个区域经济一体化组织?欧洲经济共同体,掀起了全球范围内区域经济一体化的第一次浪潮。 |
| 9. | Based on the scalar diffraction theory and the boundary condition of rayleigh - sommerfeld , the accurate on - axis propagating wave function of plane wave diffracted by small circular band is obtained by solving the first integral of rayleigh - sommerfeld
摘要从标量衍射理论出发，采用瑞利索末菲衍射边界条件，通过求解第一类瑞利索末菲衍射积分得到平面波经圆环衍射后轴上的波函数，进而分析轴上的光强特性以及光强极值数量、位置和大小与衍射圆环内外孔径的关系。 |
