基于GIS绘制三维地质数字模型图的应用研究

以东濮凹陷为例 ,阐述了基于 GIS之上的数字化地图的制作原理及过程 ,提出了三维数字模型在地层制图中的广阔前景     

Extraseasonal ensemble numerical predictions of winter climate over China

Using the nine-level Atmospheric General Circulation Model developed at the Institute of Atmospheric Physics (IAP9L-AGCM) under the Chinese Academy of Sciences, 30-year extraseasonal short-term ensemble hincast of winter climate is performed, with integrations starting from annual autumn during 1969—1998. Winter climate predictability over China is then evaluated for the first time. It follows that the predictability is higher in tropics than in extratropics. Also, it is higher over ocean compared with land, especially for surface air temperature. With height increasing in troposphere, the predictability of geopotential height slightly changes zonally, but for weakening of band-ship distribution and dropping near the date line. Of all analyzed variables, the prediction skill of air temperature and geopotential height (precipitation) is the highest (smallest). In addition, the predictability of winter climate over China and even East Asia enhances obviously during ENSO cycle, especially during La Nia phase. Simulation comparison against verifying analysis for surface temperature anomaly exhibits the model抯 skill in predicting surface temperature抯 interannual variation trend in winter.     

直接转矩控制系统与仿真

利用单片微机实现异步电动机直接转矩控制系统。分析该系统的基本原理、控制规律、数学模型、系统的软、硬件实现以及对该系统的仿真和实验。从仿真和实验结果分析，证明这种控制系统的有效性。     

连铸结晶器内湍流场的测试与计算

将ＳＩＭＰＬＥ算法应用于冶金中的数值计算，采用Ｋ－ε双方程模型和雷诺方程数值计算了拉速１．３ｍ／ｍｉｎ条件下连铸结晶器内的三维湍流场。得出了与实测一致的流场特点，同时，得出了松驰因子的新经验值α＝０．２５及压力修正因子αｐ＝０．５。编译的计算程序，可用来计算任意有限空间的三维流场。     

方坯连铸凝固传热数学模型

根据连铸二冷区不同的冷却特点，应用差分法和变时间步长，建立了与具体铸机相适应的方坯二维传热数学模型。应用所建立的数学模型可进行模拟优化计算获得铸坯的最佳二冷制度。     

Digital Model of Human Lower Extremity Musculoskeletal System Based on CT ＆ MRI

A new method to reconstruct a comparativily complete nmscle model of the human lower limb from CT and MRI data is presented. Topological structure of more than fourteen muscles is built and coordinatas of origin and insertion points are given, Based on this model, straight-line model and centroid-line muscle model are acquired. Muscle force prediction is discussed according to the model reconstructed, and a multi-objective optimization method is put forward for evaluating muscle forces of the human lower extremity.     

机械零件磨损量评定的数字化模型获取

针对机械零件磨损量评估的数字化模型获取问题,本文提出了基于反求工程的机械零件磨损量评估的数字化模型的建模方法.详细介绍了磨损后零件数字模型的获取关键技术,包括磨损零件的扫描测量,点云的预处理和零件磨损前后数字化模型3D对齐比方法.最后以一个严重磨损的直齿圆柱齿轮作为实例,说明了该方法各步骤关键操作.     

基于3D打印及“互联网+”的数字化交流平台

3D打印技术正以惊人的发展速度应用到各个领域。本文基于3D打印应用的现状和3D打印网络化服务的发展趋势,提出了一种基于3D打印及"互联网+"的数字化交流平台集成框架,构建了平台系统的体系结构,阐述了其工作流程和功能设计。     

不完全信息多属性决策的集成模型与方法

研究了一类不完全信息随机不确定型多属性决策问题,建立了能综合反映主观评判与客观信息的集成优化模型,给出了具体的决策方法和过程。通过具体实例说明该方法是可行、有效的,决策结果相对比较合理、客观,可为解决复杂的不完全信息多属性决策问题提供一条新途径。