探究计算机网络应用中泄密隐患的防范技术

随着社会经济的快速发展,计算机技术在人们的日常生活中使用的范围越来越广泛。计算机技术的使用不但可以为政府机关、企事业单位以及国防等提供信息交流的有效平台,还可以使得工作效益得到极大的提高,减少人力资源的浪费,从而推进社会各领域的发展。但是作为一个开放平台的网络,其存在的安全漏洞尤其是泄密隐患对于国家的计算机网络管理是一个巨大的挑战,它严重地威胁到个人、社会乃至国家的利益。本文主要对计算机网络应用中泄密隐患的防范技术进行研究,并有针对性的提出了相应的防范对策。     

液相色谱仪的维修(一)——仪器检修概述及泄漏问题

本文简要叙述了液相色谱仪的检修过程。文中概述了产生故障的原因,判定故障的步骤和排除故障的方法,并讨论了有关泄漏的出现和排除问题。     

Method to Characterize the Air Flow and Water Removal Characteristics during Vacuum Dewatering. Part I—Experimental Method

An experimental method using a novel design to characterize the air flow and water removal during vacuum dewatering in paper manufacturing is discussed. The experimental setup involves the intermittent application of vacuum, similar to commercial systems, using a rotating disk with slot opening arrangement. The system is capable of commercially realistic residence times of the order of milliseconds. The intermittent application of vacuum simulates vacuum dewatering on commercial paper machines. The air flow rate is calculated from changes in pressure and temperature in the vacuum tank underneath the sample. The role and importance of air flow during vacuum dewatering is studied by accurately measuring the air flow, properly taking into account the leaks during vacuum dewatering. The method described here provides for the first time accurate air flow and water removal data during vacuum dewatering. Methods of analysis of the experimental data are also presented. This information can be used to better understand the water removal process as well the role and importance of air flow during vacuum dewatering.     

Experimental results on the dispersion of buoyant gas in a full scale garage from a complex source

An experimental setup named GARAGE has been developed in order to analyze the condition of formation of an explosive atmosphere in an enclosure. This is a full scale facility in which a real car can be parked. Hydrogen releases were simulated with helium which volume fraction was measured with mini-katharometers. These thermal conductivity probes allow spatial and time volume fraction variations measurements. We present experimental results on the dispersion of helium in the enclosure due to releases in a typical car. The tested parameters are the location of the source (engine, bottom of the car, storage) and the flow rate. Emphasis is put on the influence of these parameters on the time evolution of the volume fraction in the enclosure as well as on the vertical distribution of helium.     

含裂纹缺陷管道的剩余强度评价

由于油气管道输送介质易燃、易爆和有毒性的特点,在输送过程中一旦发生泄漏,就会迅速扩散、燃烧,甚至爆炸,势必造成人员伤亡和经济损失。因此,防止管道破裂成为油气输送管道安全运行的重要任务,一直受到相关部门的高度关注。     

Java中内存泄露问题的研究与改进

Java语言中,内存空间的回收工作由垃圾收集器(GarbageCollector,GC)完成,这种方法减少了应用程序中发生内存泄露的可能性,但GC的工作机制并不完善,仍然存在内存泄露问题。本文针对此问题进行研究分析,并指出了问题产生的原因和改进的方法。     

Java垃圾收集的机制及调优

阐述Java垃圾收集的作用，归纳垃圾收集对Java应用性能的主要负面影响，分析垃圾收集的机制与算法，对垃圾收集提出调优办法。     

Method to Characterize the Air Flow and Water Removal Characteristics during Vacuum Dewatering. Part I—Experimental Method

An experimental method using a novel design to characterize the air flow and water removal during vacuum dewatering in paper manufacturing is discussed. The experimental setup involves the intermittent application of vacuum, similar to commercial systems, using a rotating disk with slot opening arrangement. The system is capable of commercially realistic residence times of the order of milliseconds. The intermittent application of vacuum simulates vacuum dewatering on commercial paper machines. The air flow rate is calculated from changes in pressure and temperature in the vacuum tank underneath the sample. The role and importance of air flow during vacuum dewatering is studied by accurately measuring the air flow, properly taking into account the leaks during vacuum dewatering. The method described here provides for the first time accurate air flow and water removal data during vacuum dewatering. Methods of analysis of the experimental data are also presented. This information can be used to better understand the water removal process as well the role and importance of air flow during vacuum dewatering.