新技术讲座两种最新烧结烟气脱硫工艺介绍

烧结生产是钢铁生产中一个污染比较严重的环节，除了产生大量粉尘、噪音外，还产生严重的有害气体污染及热污染。如何解决烧结（包括球团）生产中各种污染是广大烧结生产工作者和环保工作者亟待解决的一个重要课题。     

企业门户信息系统

本文介绍了现代企业在信息化建设过程中主流的解决方案企业门户,探讨了企业门户的设计理念,以及基础功能模块,研究了企业门户的体系结构模型。     

Fast neutron inspection of sea containers for the presence of “dirty bomb”

The possibility of the detection of “dirty bomb” presence inside sea containers is evaluated. The method proposed for explosive and fissile material detection makes use of two sensors (X-rays and neutrons). A commercial imaging device based on the X-ray radiography performs a fast scan of the container, identifies a “suspect” region and provides its coordinates to the neutron based device for the final “confirmatory” inspection. In this two sensor system a 14 MeV neutron beam defined by the detection of associated alpha particles is used for interrogation of only volume elements marked by X-ray sensor. The object’s nature is determined from passive and neutron induced, gamma energy spectra measurements. Experimental results (time-of-flight and gamma energy spectra) obtained for the irradiation 30 kg of TNT, depleted uranium and other materials hidden inside the container are presented.     

Development and Demand Analysis of Convention and Exhibition Industry Standardization

This article points out the necessity and urgency of accelerating convention and exhibition industrial standardization on the basis of an analysis of the industry demands, developing tendencies, and existing problems during development.     

电子通信设备中的接地问题浅析

电子通信设备中的接地技术,关系着整台设备的干扰特性及其抗干扰性能。根据接地干扰产生的原理,对电子通信设备的接地抗干扰技术进行了分析,提出了一些有效的抑制干扰的接地方法。这些方法在工程实践中得到了应用,有效地提高了电子通信设备的抗干扰能力。     

镁合金表面Ti—TiN复合镀层的阴极多弧离子制备与表征

表面强化、耐蚀处理对镁及其合金的应用至关重要。采用阴极多弧离子镀膜技术，在AZ91C镁合金基底上首次成功镀制了强结合力的以Ti为过渡层的TiN复合膜层，并利用高分辨扫描电子显微镜（SEM）、X射线能谱仪（EDS）、CSM显微划痕测试等技术对复合膜层的形貌、组织结构及性能进行分析研究。结果表明，采用适当的多弧离子镀膜工艺，能在经恰当预处理方法处理的镁舍金基底上制备性能良好的TiN膜。膜层均匀、致密，膜基结合力达130mN以上，复合硬度达500HV左右（AZ91镁合金基底125HV）。此外中性盐雾强化实验表明，经该方法处理后的镁合金在ASTM-B117标准测试条件下，腐蚀速度明显降低，经过200h后，表面无明显腐蚀现象。真空多弧离子镀膜技术有望在镁合金表面防护领域得到应用。     

Building an Application-Aware IPsec Policy System

As a security mechanism at the network-layer, the IP security protocol (IPsec) has been available for years, but its usage is limited to virtual private networks (VPNs). The end-to-end security services provided by IPsec have not been widely used. To bring the IPsec services into wide usage, a standard IPsec API is a potential solution. However, the realization of a user-friendly IPsec API involves many modifications on the current IPsec and Internet key exchange (IKE) implementations. An alternative approach is to configure application-specific IPsec policies, but the current IPsec policy system lacks the knowledge of the context of applications running at upper layers, making it infeasible to configure application-specific policies in practice. In this paper, we propose an application-aware IPsec policy system on the existing IPsec/IKE infrastructure, in which a socket monitor running in the application context reports the socket activities to the application policy engine. In turn, the engine translates the application policies into the underlying security policies, and then writes them into the IPsec security policy database (SPD) via the existing IPsec policy management interface. We implement a prototype in Linux (Kernel 2.6) and evaluate it in our testbed. The experimental results show that the overhead of policy translation is insignificant, and the overall system performance of the enhanced IPsec is comparable to those of security mechanisms at upper layers. Configured with the application-aware IPsec policies, both secured applications at upper layers and legacy applications can transparently obtain IP security enhancements.     

嵌入式红外遥控键盘接收端和USB闪存的整合实现

提出一种基于嵌入式技术、把红外遥控键盘接收端和USB闪存整合成为一个独立的电子产品的办法,介绍了整合过程中面临的几个问题的解决方案,研究了整合要做的硬件电路修改和固件程序修改,为资源整合和不同领域之间的交叉应用提供了理论参考和技术依据。随着技术和社会的发展,这种交叉应用会日益广泛。     

我国大学公共英语教师角色述评

随着大学公共英语教学改革的兴起,人们对教师在教学活动中应扮演怎样的角色提出了疑问和要求.通过对相关教学大纲的反思,在借鉴国内外外语教学模式及方法的同时联系教学实际寻求该问题的答案.     

浅析公司之劳务出资

我国现行<公司法>否认劳务作为公司出资的一种形式,但劳务出资要求被法律认可的呼声越来越高.文章从出资之劳务的概念入手,通过对其特点及现行法律关于禁止公司劳务出资的理论依据的分析和反驳.得出劳务成为公司出资形式的可行性,并浅谈相关的立法规制.