通用炮兵地图符号库的算法设计及实现

从符号库的算法入手 ,提出了一套通用炮兵地图符号的划分方案、结构设计及相应的实现方法     

基于利用率和负载均衡的多核实时调度算法研究

针对分区调度算法在实时多处理器系统中处理器利用率不高的现象,提出一种基于利用率和负载均衡的分区调度算法BUWBPA(Based on Utilization and Workload Balance Partition Algorithm)。该算法在满足任务实时性要求的基础上,以寻求高利用率和负载均衡为目标进行任务分配,将任务分配分成两个阶段:第一个阶段以高利用率为原则,选择任务集内利用率最高的任务先分配;第二个阶段以负载均衡为原则,根据处理器数选择利用率总和等于1或接近于1的任务进行分配,并且在此阶段对于未达到充分利用的处理器,选取可能调度的零星任务,对任务进行再次重新分配,以达到负载均衡和系统最大利用率。实验证明,该算法在实现最大利用率的前提下能很好地达到负载均衡。     

基于FPGA的空时编译码器实现

基于高速多输入多输出(Multi-input Multi-output,MIMO)系统中的空时编码技术,提出了一种能够在现场可编程门阵列(Field Programmable Gate Array,FPGA)上实现空时码编译码器的硬件实现方法,并给出了编译码过程中各步骤的实现过程。采用该方法设计的编译码器具有控制单元简单、模块结构规则,易于FPGA实现,可用于高速场合等特点。仿真分析表明,硬件实现的性能与理论性能接近。     

浅析《表面粗糙度》新、旧国标之差异

本文通过对《表面粗糙度》新、旧国标的对比,综述了新、旧标准间的不同之处,便于迅速了解和应用新标准.     

徽州建筑符号在徽酒包装设计中的应用探析

目的探析徽州建筑符号在现代徽酒包装设计中的传承和创新运用。方法从徽酒的市场定位和营销入手,分析徽州建筑符号的外观造型、图形图案和色彩在徽酒包装设计中的创新运用,以及所达到的品牌文化和艺术传播效果。结论徽州建筑是徽州地域文化的突出代表,徽州建筑符号蕴含了丰富而深刻的文化内涵。通过徽州建筑符号的使用,体现出徽酒品牌包装的感情诉求,传播了品牌的历史文化价值,彰显了其文化品位和生活态度,从而实现品牌形象塑造、品牌宣传营销和品牌发展管理的共赢。     

城市公共设施设计中地域文化符号的融入

目的随着我国城市化水平的不断提高,城市公共设施成为城市文明的标志和城市文化性格的名片,地域文化符号作为公共设施设计的重要隐性因素在公共设施设计中发挥着重要的作用,结合当代城市建设文化内涵,探究城市公共设施设计中地域文化符号的融入方式,是折射城市的文化、品质、风格及精神面貌的重要载体。方法结合城市公共设施与地域文化符号的概念,以及地域文化在城市公共设施设计中的应用价值,分别借助实例论述地域文化符号在城市商业步行街、城市公交候车亭、城市公园三方面的融合,体现城市形象和文化内涵。结论在城市公共设施设计中融入地域文化符号,能够进一步传承地域文化,强化城市的文化内涵,实现人、物、环境以及城市文脉的和谐与延续。     

Restarting automata with auxiliary symbols restricted by lookahead size

This paper presents a study on lookahead hierarchies for restarting automata with auxiliary symbols. We show that the class of languages for deterministic monotone or monotone restarting automaton, whose restart step and rewrite step are separated, coincides with that of the same type of restarting automaton whose restart and rewrite steps are not separated, for any fixed lookahead size. For the non-monotone deterministic case, the lookahead length must be approximately doubled. We then turn our attention to restarting automata with small lookahead. For the general restarting automaton model, we show that there are just two different classes of languages recognized, through the restriction of lookahead size: those with lookahead size 1 and those with lookahead size 2. We also show that the respective (left-) monotone restarting automaton models characterize the context-free languages and that the respective right–left-monotone restarting automata characterize the linear languages both with just lookahead length 2.     

对接接头与焊缝符号定义初探

焊缝符号是《焊缝代号》标准的主要内容。本文进一步明确了对接接头及常用焊缝符号的定义,对于在机械产品设计中正确使用焊缝符号具有指导作用。     

Evaluation of a set of graphic symbols

To evaluate the efficiency of a coherent set of graphic symbols for public information in railway stations, a matching procedure was used, in which a referent was specified to respondents, and they were asked to select the appropriate symbol from the complete set of symbols shown to them. Data were collected in such a way that the effects of age and travel experience could be evaluated separately. A total of 29 symbols was evaluated using 11 600 railway passengers as respondents. The results show that only half the number of symbols meet a criterion of 67% correct responses. Both increasing age and a low level of travel experience have a deteriorating effect on the understanding of the symbols. In addition to the percentage correct responses, analysis of the confusions between referents and symbols allows a more detailed assessment of the causes of a low efficiency of a symbol or a group of symbols. It is demonstrated that, based mainly on the measured confusions between symbols, proposals for the redesign of symbols can be formulated.