NexGen的Nx586－Pentium的又一个挑战者

本文简单介绍ＮｅｘＧｅｎ公司最新设计出的Ｎｘ５８６ＣＰＵ。它是一种８０×８６兼容的处理器，文中介绍了它的微体系结构，ＲＩＳＣ８６指令等。     

A Study of the Specific Heats of the Compounds in the Sm_2O_3-BaO-CuO System

By means of X-ray diffraction and adiabatic scanning calorimeter,the specific heatsof five compounds in the Sm_2O_3-BaO--CuO system,such as Sm_2BaO_4,Sm_2CuO_4,BaCuO_4,Sm_2BaCuO_5,SmBa_2Cu_3O_(7-x),from -150℃ to 800℃ have been measured.It is found that the specific heats ofthese compounds increase smoothly with the increase of temperature.     

国外特种反坦克武器的发展动向

本文着重将目前国外比较活跃的几种新型反垣克武器；软杀伤反坦克弹药，末敏弹，反坦克地雷以及智能反坦克子弹药的基本原理，作战效能，装备情况作一介绍，并对其发展方向进行了预测。     

向日葵壳水解-氧化-水解法制取草酸新工艺研究

研究了以植物纤维向日葵壳为原料，采用水解-氧化-水解法制取草酸（乙二酸）的新工艺。与用同类原料，其他方法制草酸相比，本工艺在提高产率，降低生产成本以及易于业化方面有很大突破。在H2SO4质量分数为70%，原料浸泡时间3h以上，m(HNO3):m（向日葵壳）=方面有很大突破，在H2SO4质量分数为70%，原料浸泡时间3h以上，m(HNO3):m(向日葵壳）=2.1:1.0；氧化-水解反应时间5h，反应温度65-70℃的条件下，草酸二水合物收率可达78.5%。     

风冷冷水机组室内安装方案的探讨

结合实际工程，介绍风冷冷水机组在工程应用中置于建筑转换层或建筑内的设计，并对风冷冷水机组室内安装的设计进行探讨。     

米勒问题在水文基线设计中的应用

在水利工程测量和水文测验的实际工作中,针对采用经纬仪或全站仪等仪器进行普通测量,应用米勒问题可巧妙解决测量实际工作中的一些问题,本文提出的基线设计问题就是其中一例.计算和分析表明:对水文传统的基线和高程基点的设计理念要有新的认识,这一理论不仅对水文测量,而且对其它工程测量都具有很强的指导作用.     

龙开口水电站溢流坝段动力模型破坏试验研究

采用仿真混凝土材料研究了龙开口水电站溢流坝段在不同因素影响下的动力破坏特征,并通过对6个模型试验结果的分析探讨了溢流坝段的动力破坏机理。试验中考虑了坝体-库水的动力相互作用以及横河向地震动对大坝破坏的影响,采用规范谱波和场地谱波两种地震动激励进行模型超载破坏分析。试验结果为工程设计和评价溢流坝段的抗震性能提供依据。     

后桥壳的可靠性优化设计

该文讨论了后桥壳的可靠性优化设计问题.在基本随机变量的概率特性已知的情况下,应用随机摄动法和约束随机方向法对后桥壳进行可靠性优化设计,并编制了实用的计算机程序,可以迅速准确地得到后桥壳的可靠性设计参数.     

Preparation of a pitch-based activated carbon with a high specific surface area

Pitch based activated carbons (PAC) with a high specific surface area were produced by a direct chemical activation route in which oxidative stabilized pitch derived from ethylene tar oil was reacted with potassium hydroxide under various activation conditions. It was found that PACs with a surface area of around 2600–3600 m² g^-1 could be obtained under suitable activation conditions. N₂ adsorption (at 77 K) and X-ray photoelectron spectroscopy experiments showed that the PAC has a uniformly developed micropore structure and a narrow pore size distribution (radius 0.8–1.6 nm). Abundant oxygen-containing functional groups (such as C–OH, C–O–C, C=O, COOR etc.) were found to exist on its surface. Compared with a commercially available activated carbon (AC) and also a pitch based activated carbon fibre, PAC has a quicker adsorption–desorption velocity and a larger adsorptive capacity to benzene due to its higher surface area. Clear surface differences between PAC and AC were observed by transmission electron microscopy. This revised version was published online in November 2006 with corrections to the Cover Date.