Initial coastline sampling data , racon position data and sart position data are acquired from sea chart by digitizer . all of the initial data are saved with predefined data structure in data files 雷达回波中的海岸线、雷康和sart的原始数据是通过数字化仪从海图中采样获取的,获取后的数据按照预先设计好的数据结构保存在了特定类型的文档中。
On - line hand - drawn graphics recognition is a branch of pattern recognition , and plays a very important role in human - machine interactions . it refers to methods and techniques dealing with the automatic processing of a sketch as it is drawn using a digitizer or an instrumented stylus 手绘图形的联机识别技术是提高人?机交互智能化水平的一项关键技术,在工业、军事和科学研究领域中具有极高的应用价值。
Therefore , it means much to develop the digitizer based on pxi bus . to establish the whole scheme of digitizer , the design studies the implements of different products based on many articles and product descriptions , and compares the advantages and disadvantages comprehensively 本设计在参阅大量文献和产品资料的基础上,对现阶段数字化仪产品作了的充分分析,多方位对比了各种实现方法的优缺点,并最终确定了pxi总线数字化仪的总体方案。
It is the particular application of modern information technology in civil engineering construction . the research on digital tension technology has important backgrounds of engineering and broad prospects of application . intelligent tension instrument of prestressed concrete is a kind of digitizer with the function of intelligent display and control 预应力数字化张拉技术是采用数字化设备直接进行张拉施工的技术,是现代信息技术在土木工程施工中的具体应用,该技术的研究有着重要的工程背景与广阔的应用前景。
The digitizer based on pxi bus uses fpga ( field programmable gate array ) to implement 256 points , radix - 2 dit fft ( fast fourier transform algorithm ) . the design uses pipelining for fft processing and can accomplish sampling and processing signals of two channels at the same time . in the signal acquisition circuit , - a / d convector is used to enhance the precision of the signal sampling 在本设计中,采用fpga ( fieldprogrammablegatearray )实现了256点基2dit算法复数fft ( fastfouriertransformalgorithm快速傅氏变换算法)处理器,具有较高的速度和运算精度fft ,设计采用流水线处理方式大大的提高了处理速度,可实现对两个通道输入信号的并行采集与处理。