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文章从土地规划龙头作用、产业结构优化升级、垄断一级市场、提高用地项目准入门坎、建立地价动态监测体系、盘活存量土地等方面分析和提出了全面参提高土地参与宏观调控的有效途径。 相似文献
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讨论了广义sinh-Gordon方程的复合多辛格式的构造及其实现方法. 针对在非线性物理中具有重要意义的广义sinh-Gordon方程, 在Hamiltonian空间体系下推导出了一阶多辛偏微分方程组形式. 随后利用复合方法构造了其满足多个离散守恒律(离散的多辛守恒律、离散的局部能量守恒律和离散的局部动量守恒律)的半隐式多辛格式用以求解广义sinh-Gordon方程. 数值模拟结果显示出了多辛方法在求解非线性发展方程过程中具有的两大优势: 较高的数值精度和良好的长时间数值稳定性. 相似文献
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Nonlinear wave equations have been extensively investigated in the last sev- eral decades. The Landau-Ginzburg-Higgs equation, a typical nonlinear wave equation, is studied in this paper based on the multi-symplectic theory in the Hamilton space. The multi-symplectic Runge-Kutta method is reviewed, and a semi-implicit scheme with certain discrete conservation laws is constructed to solve the first-order partial differential equations (PDEs) derived from the Landau-Ginzburg-Higgs equation. The numerical re- sults for the soliton solution of the Landau-Ginzburg-Higgs equation are reported, showing that the multi-symplectic Runge-Kutta method is an efficient algorithm with excellent long-time numerical behaviors. 相似文献
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