利用单片机改造键盘接口

介绍的是对一种 2 0世纪 80年代由国外引进的数控车床的控制面板进行改造的方法。改造后的控制面板与原控制面板的控制效果完全相同 ,且操作方便 ,性能稳定 ,使用效果良好     

双电源自动切换开关（ATS）在站用电系统中的应用分析

文章通过对变电站站用电系统中2种常用的备自投设备—微机型备自投装置和双电源自动切换开关（ATS）进行对比分析,阐述双电源自动切换开关（ATS）在站用电系统应用中的可靠性和简便性。     

大唐岩滩水力发电有限责任公司500kV超高压变压器冷却系统改造

大唐岩滩水力发电有限责任公司（以下简称岩滩发电公司）主变压器安装在厂房与大坝之间,主变压器采用的冷却方式为强迫油循环风冷方式,受运行环境影响冷却效果差。文章阐述了通过对3#主变压器冷却器进行改造,将冷却方式更换为强迫油循环水冷方式,大大提高了3#主变压器的冷却效果,为岩滩发电公司其他主变压器冷却器改造提供决策依据和经验。     

论投资项目经济评价基础--资金等值计算

文章对各种投资项目资金等值计算进行了详细讨论。并给出了相应的合理处理与计算方法。特别是计息期长于支付期的投资项目资金等值计算。     

增值税转型改革对煤炭企业的影响

介绍了增值税转型改革的主要内容,系统分析了增值税转型变化后对煤炭企业税收产生的影响,针对性地提出了煤炭企业应对增值税转型的基本思路。     

Organization,technology and management innovations through acquisition in China’s pork value chains: The case of the Smithfield acquisition by Shuanghui

This paper reviews the changes in Shuanghui’s operations after the Smithfield acquisition as well as transformations in China’s pork industries. As income grows and diets change, there has been an increasing demand for high-quality pork and more processed pork products. However, China’s swine and pork industries are still at an early stage of development as evidenced by the low market concentration, intensive use of labour, a proliferation of intermediaries, and low levels of technology. Bounded by the established consumer preferences for freshness and the status quo in the midstream and upstream segments, Shuanghui is in a slow process of upgrading its domestic operations with Smithfield’s leading brands, import of chilled and frozen pork, advanced technologies, and the vertically integrated business model after this acquisition. In particular, it remains unclear whether Shuanghui can follow Smithfield’s experience to establish stable and safe hog supplies by multiplying self-owned hog farms, maintain and expand its current contracts with large-scale commercial hog farms, or rely more on global sourcing of pork primarily from the U.S.