Design of the PC/104 Bus Mode Multi-channel Analyzer

This paper expatiates on the bus structure and develop the bus mode Multi-Channel Analyzer (MCA). The nucleus of this MCA is the PC/104 embedded computer, and it introduces the bus communication to realize system and data communication. It may realize data collecting and showing in the field, because the bus mode is rapid. At first, on the hardware we introduce CMOS components, this reduces power, volume and weight. These make it adapts to use in the field; besides, on the software we adopt C and assembly language to program in order to improve conversion speed. At the same time, single-task DOS operating system is infroduced, which makes the software run more steadily, operate more simply. By means of testing on the spot it can normally work, so it suitable to work in the field.     

浅谈AutoCAD在高版本DOS中的应用

本文在探讨了高版本ＤＯＳ技术特点的同时，对ＡｕｔｏＣＡＤ与ＤＯＳ升级，ＡｕｔｏＣＡＤ中文环境问题和其它版本ＡｕｔｏＣＡＤ与ＤＯＳ的适应性问题，提出了新的见解。     

Early growth and quality of radiata pine in a silvopastoral system in New Zealand

The effect of different understoreys on the early growth and quality of radiata pine (Pinus radiata) in a silvopastoral system was evaluated in Canterbury, New Zealand. Fitted models successfully represented the effect of understorey on the growth (basal area and height) and a quality of trees (diameter over stubs). Basal area, diameter, height and volume growth were affected by understorey competition. Trees growing with no-understorey had 34%and 29% higher volume than trees growing with lucerne (Medicagosativa) and cocksfoot (Dactylis glomerata)understoreys, respectively. However, the height of trees at age 10 grown without understorey competition was only 9% and 15% more than trees grown with grass and lucerne understorey, respectively. Understorey competition effects on growth became more evident during the summer and early autumn months when water deficits occurred. The quality of trees was also affected by understorey competition. While trees grown in bare ground had higher growth than trees grown with understorey competition, they had the poorest stem quality with higher diameters over stubs, branch size, sweep and proportion of stem defects. This will have an impact on the agroforestry system profitability by affecting the net harvest revenue. This revised version was published online in June 2006 with corrections to the Cover Date.     

实现DOS与WindowsXP双向系统下的Ghost维护

就如何实现Dos与WindowsXP双向操作系统的安装,弥补WindowsXP丢弃Dos操作系统的缺憾,解决计算机系统遭到破坏后,在无光驱、软驱和无法进入WindowsXP系统的前提下,维护人员可通过启动Dos系统,运行Ghost对计算机进行维护操作。     

DOS操作系统的菜单程序

介绍一个ＤＯＳ操作系统的菜单程序，该菜单程序按Ｎｏｖｅｌｌ Ｎｅｔｗａｒｅ格式书写，具有良好的人机界面，有助于克服学习和使用微机时的障碍。该菜单程序可以作为ＤＯＳ操作系统的一种ＣＡＩ软件。     

THE DIFFERENCE IN CONSTRUCTION BETWEEN DOS/C AND CCDOS AND THEIR COMPATIBILITY

This paper discusses the difference in censtruction betweentwo Chinese wcrd processing system, the environment and method of runninga CCDOS software under the DOS/ C. DOS/ C is one Chinese word processingsystem used in the Chinese terminal of Siemens computer system, comparisonwith the other CCDOS, there are a lot of difference, especially With the Soft-ware running under the CCDOS Used Very currently nowadays.     

超氧化物歧化酶(SOD)研究综述

超氧化物歧化酶广泛存在于真核细胞与原核细胞的细胞质、线粒体和叶绿体中,可清除生物体内超氧阴离子自由基,有效地抗御氧自由基对有机体的伤害。就超氧化物歧化酶的种类、结构、功能、基因的分离克隆及其在食品、医药、保健和日用化工等方面的应用进行了综述。