地面数字电视系统中内交织器的FPGA实现

在地面数字电视系统中，广播信道存在着突发噪声干扰和随机噪声干扰，而且前者的危害甚于后者。交织就是把集中的突发噪声引起的差错，按一定规律均匀分散给各码字，提高总体差错控制能力。该文介绍了DVB—T地面数字电视系统中内交织的原理和算法，并在此基础上，利用FPGA器件实现内交织器中的比特交织和符号交织。提出了一种新的数字信号测试方法-SignalTap。最后，经过仿真和硬件测试，得到预期的设计结果。     

基于GIS的野外地质素描系统的模型与设计

鉴于地质素描在野外调查中具有重要地位,本文系统分析了地质素描所涉及的原理及规律,在此基础上建立了较为完善的地质素描的地质模型,并由此建立了基于GIS的系统模型,来实现野外的地质素描功能。完成的成果将更能满足现代野外地质素描需要,为地质调查工作提供更快捷地帮助。     

对客服务中的会话原则

分析了旅游英语中的话语表达方式,在介绍语言学家Grice所提出的语言交流中应遵守的一些基本原则的基础上,认为在对客服务中还应遵循关注他人尊重他人、少用第一人称等会话原则。     

多QoS机制的IP TV管理构架研究

为满足IP TV（基于IP网络的电视系统）对高接入带宽 、高速率I/O(输入/输出)和QoS（服务质量）传输的要求，本构架综合带宽节约技术、业务 量工程技术、接入控制技术、QoS传输技术等多种技术，能够根据用户业务应用的QoS需要 统一调整这些机制. 仿真实验显示，这些机制能在动态业务量环境中，给不同并发程度的用 户业务应用提供较好的QoS保证.     

高职院校有色冶金原理课程教学的探索研究

从高职培养的目标出发，结合高职有色，台金原理课程特点，从教材内容、教学方式、教学方法等方面就如何搞好其教学进行了探索研究。     

四路视频输入处理器SAA7144HL的应用

SAA7144HL是4个单独的多标准视频解码器的组合,是完全的3.3V CMOS电路和高集成的视频监测应用电路.详细介绍了SAA7144HL的内部功能,给出了SAA7144HL的典型应用电路.     

Parameter Sensitivity and Predictive Uncertainty in a New Water Quality Model, Q2

A new dynamic model of water quality, Q2, has recently been developed, capable of simulating large branched river systems. This paper describes the application of a generalized sensitivity analysis (GSA) to Q2 for single reaches of the River Thames in southern England. Focusing on the simulation of dissolved oxygen (DO) (since this may be regarded as a proxy for the overall health of a river); the GSA is used to identify key parameters controlling model behavior and provide a probabilistic procedure for model calibration. It is shown that, in the River Thames at least, it is more important to obtain high quality forcing functions than to obtain improved parameter estimates once approximate values have been estimated. Furthermore, there is a need to ensure reasonable simulation of a range of water quality determinands, since a focus only on DO increases predictive uncertainty in the DO simulations. The Q2 model has been applied here to the River Thames, but it has a broad utility for evaluating other systems in Europe and around the world.     

First principles total energy studies of the adsorption of germane on Ge(001)-c(2 × 4)

We perform first principles total energy calculations to study the energetics, and the atomic structure of the adsorption of germane (GeH₄) molecules on the Ge(001)-c(2 × 4) surface. The adsorption of a GeH₄ unit occurs after its dissociation into a germanium trihydride (GeH₃) and a hydrogen atom and a subsequent decomposition into a germanium dihydride (GeH₂) subunit and H atoms. Consequently, we first consider the adsorption of GeH₂ in two different configurations; the on-dimer and the intra-row geometries. Similar to the adsorption of SiH₂ and GeH₂ on Si(001), it is found that the on-dimer site is more stable than the intra-row geometry by 0.13 eV. However, in the adsorption of a GeH₂ fragment together with two H atoms we find that the intra-row geometry is energetically more favorable, again, similar to the adsorption of SiH₂ and GeH₂ (plus two H atoms) on the Si(001) surface.     

论邓小平在实践观上的创新

邓小平的实践观是邓小平理论深层的哲学基础，其精髓是解放思想，实事求是，不断地总结实践经验和坚持理论和实践相结合是邓小平实践观的重要内容和方法论原则，求实性、创造性、人民性是邓小平实践观的最根本特点，在实践中认识社会主义、在实践中发展社会主义是邓小平在实践观上的最大创新。     

500 kV变电所计算机监控系统设计原则探讨

虽然综合自动化系统在500kV变电所中应用已有几年，但由于该技术也一直处于不断改进和完善过程中，目前仍无统一的标准系统在系统中应用．本文针对500kV变电所自动化计算机监控系统设计过程的三个原则问题：监控组网方案、五防功能、与站内其他智能装置的通信接口进行重点讨论，对其中相关方案的功能特点及不足进行了分析总结，并对提高系统的可靠性、规约的标准化和扩大监控范围等方面提出了有益的建议．