Logistics park as the spatial aggregation of modern logistics activities， for the society to provide diversified， large-scale modern logistics service at the same time， also greatly reduce operating costs， improve enterprise competitiveness， improve the regional investment environment， promoting the rapid development of other At present， the logistics industry fast investment growth all over the country， the national logistics park number continues to increase， the structure change logistics park， logistics park began to transformation and upgrading; But there are still logistics park positioning is not clear， homogeneityphenomenon serious and substantial development low This article embarks from the current situation of the development of logistics park， based on the analysis of the present situation and countermeasures of logistics park planning， in-depth study of China's logistics park from multiple angles scale， layout， structure， characteristics， trends， and more accurately grasp the status quo and trend of development of the logistics park in China， more accurately grasp the direction of logistics park planning and construction and management， on the basis of this puts forward the Suggestions of perfecting our country's logistics 请采纳。
摘要：本文主要介绍音乐报时器的具体设计过程，整个过程概括分为硬件设计和软件设计。硬件设计主要使用PC机和STAR ES598PCI实验箱中的可编程定时/计数器8253，可编程并行接口芯片8255，中断控制器8259，可编程设置型键盘/显示器8279，七段数码管，发光管，蜂鸣器等组成基本控制电路。软件部分使用汇编语言编写程序代码，实现了各个芯片的初始化及中断、计数、判断、跳转、循环等各项控制操作。整个设计实现了数码管时间显示，键盘定时，蜂鸣器响铃和发光管闪烁等多个功能，工作稳定，控制简单。关键词：音乐报时器 ES598PCI 8253 8255 8259 8279 七段数码管 发光管 蜂鸣器Abstract: This paper mainly introduces the music's specific design time process， summed up the whole process is divided into hardware design and software The main use of PC hardware design and experimental box STAR ES598PCI programmable timer / counter 8253， 8255 chip programmable parallel interface， interrupt controller 8259， programmable set-based keyboard / display 8279， Seven-Segment LED， light-emitting tubes， buzzers and other components of the basic control Software programming using assembly language code， the realization of the various chip initialization and interrupt， count， judge， jump， cycle and other control The realization of the whole design of digital control time display， the keyboard from time to time， buzzer ringing and flashing LED， and many other functions， work stability， simple Keywords: music chronopher ES598PCI 8253 8255 8259 8279 Seven-Segment LED digital tube buzzer
