压电支承减摩机理研究

本文在研制要求高分辨力和动态性能的小过载加速度计时,在传统的液浮摆式基础上采用了压电支承。并用润滑和摩擦理论对在轴向正弦激励下支承转动方向的减摩机理进行分析,表明在支承的球枢轴和圆柱宝石眼之间存在着以流体动力油膜润滑为主的多种润滑状态。用雷诺方程和润滑理论的分析方法计算了间隙油膜厚度和承载能力,并用所设计的实验装置验证了润滑状态和测定了静、动摩擦力矩,从而确定了支承的工艺要求和最优参数,使所研制成的加速度计性能较传统的提高1～2个数量级。     

从草浆造纸黑液中提取木质素的研究

本文研究了从草浆黑液中提取木质素的方法，不用减压和过滤设备，于每升黑液中提取木质素８４．０ｇ，并除去约９０％的ＣＯＤ。观察黑液所形成的凝胶，发现其具有多级三维网状结构。     

死亡权:安乐死立法的价值基础

目前,绝症病人的死亡权问题已成为国际性话题。和死亡权密切相关、争论最为激烈的问题是安乐死立法。表面看来,安乐死不但违背了尊重生命的直觉,也似乎公然侵犯了最基本的人权——生命权,因为人们常常把生命简单地等同于生存,把死亡理解为生命结束后的状态即和生存无关的无生命状态。其实,死亡和生存是贯穿生命始终的生命自身的本质规定。因此,生命权是生存权和死亡权的统一,死亡权是生命权的应有之义。这就奠定了安乐死立法的价值基础。     

Non-isothermal reduction kinetics of titanomagnetite by hydrogen

Reduction of titanomagnetite (TTM) powders by H2-Ar gas mixtures was investigated under a non-isothermal condition by using a thermogravimetric analysis system. It was found that non-isothermal reduction of TTM proceeded via a dual-reaction mechanism. The first reaction was reduction of TTM to wüstite and ilmenite, whereas the second one was reduction of wüstite and ilmenite to iron and titanium dioxide. By using a new model for the dual reactions, which was in an analytical form and incorporated different variables, such as time, temperature, particle size, and hydrogen partial pressure, rate-controlling steps for the dual reactions were obtained with the apparent activation energies calculated to be 90–98 and 115–132 kJ/mol for the first and second reactions, respectively.     

在Diels-Alder反应中一种新的二烯──1─(2-丁二烯基)吡啶溴化物

１－（３－二无氧化硫杂环戊－３－烯基）吡啶溴化物（４）作为新的带正电荷的二烯（６）的稳定的前体，它与一些缺电子的亲双烯体发生［４＋２］环加成反应。     

Software technology for e-commerce era

The rapid growth of Internet usage and electronic commerce (e-commerce) applications will push traditional industries to transform their business models and to re-engineer their information systems. This direction will give the software industry either great opportunities for their business growth or crucial challenges to their existence. This article describes two essential challenges the software industry will face and presents relevant new technologies that will be helpful for overcoming those challenges.     

Ge—Si二元合金系的热力学

利用作者提出的二元相图数据计算活度的计算机程序CABPD(Calculating Activities from Binary Phase Diagrains),计算得到此体系液相及固相的热力学性质。表明此体系液、固相都呈正偏差,可以表示为: L_(Gm)(L)=7125X_(Si)X_(Ge)(J/mol) L_(Gm)(S)=4808X_(Si)X_(Ge)(J/mol)     

影响高比重合金性能的主要因素探讨

本文研究了有关因素对高比重合金性能的影响,结果表明,当合金的钨含量高于95％时,则主要因素即成形压力对合金的最终性能有较大的影响,其影响规律对高比重合金的研究与生产均有一定的指导意义.