VPN 的构建方法

本文阐述了VPN的概念和采用隧道技术实现的原理,以及基于Internet的VPN构建方法和步骤.     

THE TRANSFER BEHAVIOUR OF SOME CATIONS AT WATER／NITROBENZENE INTERFACE BY SEMIDIFFERENTIAL CYCLIC VOLTAMMETRY

The transfer of Sr~(2+) and Ba~(2+) ion, facilitated by 18-Crown-6 present in the aqueous phase, and of succinylcholine ion at w/nb interface were investigated by semi-differential cyclic voltammetry. A good polarographic curve of succinylcholine ion dissolved in water was obtained in the system of 0.01 mol/l LiCl (w)——0.01 mol/l TBATPB (nb). The peak current is directly proportional to the concentration of SC~(2+) ion. It can be used for the determination of SC and the detection limit is 1.05×10~(-5) mol/l.The apparent D~w and D~(nb) have been estimated. The transfer of Sr~(2+) and of Ba~(2+) at the interface are facilitated by 18-Crown-6 present in the aqueous phase and the peak current is directly proportional to the concentration of 18-Crown-6 in water. This method can be used for the determination of the complexing agent and for the stability constant of the complex formed in the aqueous phase.All the experimental results are in keeping with the theoretical.     

三峡工程水电站压力管道和蜗壳技术结构型式的选择及论证

The developing process of simulation technology is discussed in view of its development, maturation and further development.The applications of simulation technology in the fields of national economy are introduced. Finally, the level and status quo of simulation technology home and overseas are analyzed, and its future trend in the new century is presented.     

关于教育技术专业课程建设的若干思考

在分析了教育技术专业现在面临的许多外界环境变化的同时 ,从市场、商品经济学的有关角度 ,提出了关于教育技术专业本科课程设置的几点想法 ,并在实践的基础上给出了一些具体的做法     

技术组织的进化

通过对技术发展过程的分析，揭示了技术组织形式必然要进化的原因。介绍了技术组织的历史发展过程，指出随着生产的发展、技术的进步，技术组织会不断地进化。     

浅谈数字逻辑实验教学改革

结合实验教学实际 ,对传统数字逻辑实验教学体系进行了改革 ,提出了在新形势下确立数字逻辑实验教学目标、内容、组织形式、手段和评价的措施 .     

反思的现代性与技术理性的解构--海德格尔和福柯论现代技术问题

海德格尔和福柯对于现代技术问题的思考属于某种反思的现代性立场：无论前者对机械技术的本质的追问，还是后者对自我技术的谱系学分析，都没有简单地否定现代技术，而是揭示了现代技术的解蔽和遮蔽双重性。这样的立场告诉我们：面对现代技术的极度张扬，哲学应该坚持一种保守主义姿态，应该在更新的意义上恢复经验的地位。     

电子测配色和分色制版技术在纺织印染工业中的应用

在纺织印染、染料等学科中，颜色的度量有着相当重要的作用和广泛的用途。纺织是最古老的行业之一，新的纺织技术不同于传统纺织技术，电脑测色与配色、电子分色制版等新技术又赋予了它新的内容。同时，古老的纺织业又为最现代的纺织技术提供了广阔的舞台。     

国内局部增氧助燃技术研究及应用进展

局部增氧助燃技术能用于各种燃料和大多数工业炉窑。介绍了局部增氧助燃技术的基本概念；然后通过国内有关典型应用实例说明：局部增氧助燃技术用于节能和环保时具有显著的综合效益；最后通过实测数据证明：用富氧助燃时，能明显降低燃料的燃点和燃尽温度，并大大缩短燃尽时间。     

The Nature of Light and Twentieth Century Experimental Physics

In the popular literature of physics the electromagnetic field isoften treated as though it has an intrinsic particle nature. When thetheory is examined carefully, quantum theory only makes the weakerrequirement that the emission and absorption of light are restricted todiscrete amounts of energy. There are very few realizable experiments inoptics for which the classical Maxwell theory and the quantum theorymake a different prediction. I discuss some of these experiments with anemphasis on the distinction between what the experiments tell us aboutthe measurement process, and what they tell us about the nature of thelight field.