This book contains an introduction to hyperbolic partial differential equations and a powerful class of numerical methods for approximating their solution, including both linear problems and nonlinear conservation laws. These equations describe a wide range of wavepropagation and transport phenomena arising in nearly every scientific and engineering discipline. Several applications are described in a self-contained manner, along with much of the mathematical theory of hyperbolic problems. High-resolution versions of Godunov's method are developed, in which Riemann problems are solved to determine the local wave structure and limiters are then applied to eliminate numerical oscillations. These methods were originally designed to capture shock waves accurately, but are also useful tools for studying linear wave-propagation problems, particularly in heterogenous material. The methods studied are implemented in the CLAWPACK software package. Source code for all the examples presented can be fou
《干细胞科技与产业发展报告》主体内容共分三部分,分别为管理篇、科技篇和产业篇,主要跟踪分析国际干细胞领域研发策略,深入介绍干细胞科技研究进展,展望干细胞产业发展方向。在此基础上,提出对我国干细胞研究的建议,为我国干细胞领域政策制定及干细胞科研方向与产业发展提供参考依据和信息支持。 《干细胞科技与产业发展报告》可供干细胞领域管理人员、广大科研人员和产业人员阅读和参考。
蒙特卡洛方法是分析现实世界中工业问题的一种重要方法,它不必为了对问题进行简化而做出各种不现实的假设,而这些假设是确定性数学模型所不可避免的。本书介绍了一种研究系统动态行为的统一方法,其中蒙特卡洛方法是求解复杂现实问题的一种工具。这种综合性的方法把先前各种独立的技术、方法,比如产品的可靠性、维护需要、备件可用性等等成功地结合在一起。作者指出,使用这种方法能够提高效率。 本书的主要特点: 全面涵盖了系统工程和蒙特卡洛方法的基础理论和基本方法,使读者更容易理解涉及的知识和概念。 对方法的描述循序渐进,从简单统计过程的基本估计开始,经过多重积分的计算,再到复杂转移方程的求解,逐步深入。 对提出的每一种技术给出了大量的工业实例加以说明。 对某些典型的例子提供了软件(可通过FTP取得),