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This paper described a novel VCO circuit using four-quad multiplier as a basic componont and using AGC loop. 本文介绍了一种采用以四象限模拟乘法器作基本元件,并使用AGC环的新颖VCO电路. With matrix conversion of geometry optics as a basis, simulation and modeling for complex multi-lens imaging optical system for four-quad splitting are carried out through light ray trace. According to the relation curves obtained from the basic parameters, optimization process of the system says that amplifying coefficient of an amplifying lens is 20, off-axis distance of the splitter 3mm and exit pupil diameter of the system 1mm. New ideas and methods are provided for the parameters of the complex optical... With matrix conversion of geometry optics as a basis, simulation and modeling for complex multi-lens imaging optical system for four-quad splitting are carried out through light ray trace. According to the relation curves obtained from the basic parameters, optimization process of the system says that amplifying coefficient of an amplifying lens is 20, off-axis distance of the splitter 3mm and exit pupil diameter of the system 1mm. New ideas and methods are provided for the parameters of the complex optical system. 以几何光学的矩阵变换为基础,通过光线追迹的方法,对四象限分光的多透镜成像复杂光 学系统进行仿真建模。由所得到的基本参数的关系曲线,优化确定系统的放大镜放大系数为20,分光镜离轴距离为3mm,系统出瞳直径1mm。对复杂光学系统参数的优化提供了新的思路和方法。 This paper introduces a 3D simulation system for large terrain based on C/S computational schema. In this system, automatic data schedule technology is in place and data structure of multi-resolution representation of terrain formed by four quad trees is presented, so the system can work through streaming to support data set of arbitrary size with only little storage space and computational consumption. The system also supports multiple users as well as multiple views. 介绍了自主设计开发的大规模三维地形仿真系统,该系统采用C/S结构,在数据分块的基础上,通过合理的数据调度策略及有效的数据结构,使得数据以“流”的方式进行处理和显示。系统计算量小,内存消耗低,支持海量数据的无缝漫游,同时支持多用户并发控制及多窗口显示。
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