从工业化模式比较看传统工业化的弊端

工业化有资本主义市场经济、社会主义计划经济、社会主义市场经济三种模式,通过对不同工业化的模式比较,可以系统深入地了解传统工业化的弊端。     

Block （or Hamiltonian） Lie Symmetry of Dispersionless D-Type Drinfeld-Sokolov Hierarchy

In this paper, the dispersionless D-type Drinfeld-Sokolov hierarchy, i.e. a reduction of the dispersionless two-component BKP hierarchy, is studied. The additional symmetry flows of this hierarchy are presented. These flows form an infinite-dimensional Lie algebra of Block type as well as a Lie algebra of Hamiltonian type.     

On the Generalized Heisenberg Supermagnetic Model

In this paper, we construct the generalized Heisenberg supermagnetic models with two different constraints and investigate the integrability of the super integrable systems. By virtue of the gauge transformation, their corresponding gauge equivalent counterparts are derived, i.e., the super and fermionic mixed derivative nonlinear Schrödinger equations, respectively.     

合理开发可再生资源的向量微分模型及其应用

本文首先建立了接年龄分组的可再生资源，各年龄组数量应满足的向量微分模型．然后利用所建模型成功地解决了CMCM96A题中的问题2。     

复数比的定比分点公式与应用

建立复平面后,平面内线段的定比分点公式可以用复数形式来表示,即: 但由于这一公式的应用范围的局限性,本文将考虑更一般的结果,即探讨复平面内复比的定比分点公式与应用。定义设复平面上一点P,它与已知点P_1、P_2构成     

政府责任的强化与农业科技推广体系的创新

农业科技推广体系所面临的主要问题是体制问题,改革的中心问题是：在面向市场时,必须立足凸现公益性,强化政府的责任,创新以政府主管部门为主体的多元化体系。     

政府为主导,创新红三角科普文化制度

科普化制度是科学技术转化为现实生产力、提高民族精神明素质的大众化制度。创新红三角的科普化制度，是推动红三角经济化发展的有效途径，也是红三角经济圈各级地方政府的职责。     

哲学视野中的人口、资源、环境的关系

人口爆炸、资源枯竭、环境恶化等一系列的发展问题 ,使人们对人与自然的关系问题感到迷惑、茫然 ,人与自然的关系越来越紧张。究其根源 ,主要是主体意识的恶性膨胀。人们在重新审视这一关系的同时 ,也极力倡导建构人与自然共生共存、共同和谐发展的新型关系。     

THE RECURSION OPERATOR FOR A CONSTRAINED CKP HIERARCHY

This paper gives a recursion operator for a 1-constrained CKP hierarchy, and by the recursion operator it proves that the 1-constrained CKP hierarchy can be reduced to the mKdV hierarchy under condition q = r.     

Nonlinear waves of the Hirota and the Maxwell Bloch equations in nonlinear optics

In this paper, considering the Hirota and the Maxwell-Bloch (H-MB) equations which are governed by femtosecond pulse propagation through a two-level doped fiber system, we construct the Darboux transformation of this system through a linear eigenvalue problem. Using this Daurboux transformation, we generate multi-soliton, positon, and breather solutions (both bright and dark breathers) of the H-MB equations. Finally, we also construct the rogue wave solutions of the above system.