十进制计数器

The CD4017 Johnson decade counter finds use in simple circuits ranging from sound effects to LED displays.

CD4017 Johnson十进制计数器应用于从声效到LED显示的简单电路中。

The crystal oscillator provides frequency stable accurate 32768Hz the signal. After frequency divider frequency division to 1Hz stable accurate function signal,Does for the counter pulse signal. Six counter serial connections,Uses the decimal base and the senary counting separately (when ten for ternary notation counting). Comes out through 7448 decoders and the monitor appearances,The counting cycle is 24 hours.

晶振提供一个频率稳定准确的32768Hz的信号，经过分频器分频的到1Hz稳定准确的函数信号，做为计数器的脉冲信号，六个计数器串行连接，分别采用十进制和六进制计数，通过7448译码器和显示器显现出来，计数周期为24小时。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。