论上古汉语军事同义词语的发展——从《左传》与《史记》中的军事同义词语的比较谈起

《史记》与《左传》相比在军事同义词语上发生了巨大变化,二书同义组有所增减,同义组成员有所增减替换,这些都体现了上古汉语军事同义词语的发展。造成上古汉语军事同义词语发展的原因是多方面的,主要有社会基础的变化而导致的同义词存在基础的变化、个体词的发展、同义词成员之间的互相影响、复音词的大量出现、修辞用法等。     

Significance of the length of the shortest tree

The distribution of lengths of phylogenetic trees under the taxonomic principle of parsimony is compared with the distribution obtained by randomizing the characters of the sequence data. This comparison allows us to define a measure of the extent to which sequence data contain significant hierarchical information. We show how to calculate this measure exactly for up to 10 taxa, and provide a good approximation for larger sets of taxa. The measure is applied to test sequences on 10 and 15 taxa.     

多变量广义预测控制及其在投资决策中的应用

<正> 一、引言 作者提出的多变量广义预测控制算法,用递推的方法,进行多步最优(最小方差)预测,以确定某一性能指标下的最优控制方案。尽管提出这种算法的背景是应用于工业控制,但其基本思想和方法可推广到经济系统的投资决策中。 一般来说,不同部门的经济系统的发展(比如重工业     

The uses and abuses of ‘consensus’ forecasts

Clemen's (1989) review of the forecast-combining literature amply illustrates both the interest in and the importance of this subject. This article stresses the tautological properties of various consensus measures that assure their success relative to most individual forecasts. It confirms the finding of earlier studies that for each specific macroeconomic variable roughly one-third of individual forecasters are more accurate than a consensus. However, each individual does relatively poorly for some variable while the consensus, in contrast, necessarily never fails relative to most individuals. These results, like most previous studies, describe consensus measures that are synthetic constructs derived from a pre-existing set of individual forecasts. Strictly speaking, this contemporaneous consensus is not available to individual forecasters when their forecasts are made. A prior consensus measure, which is in their information sets, was relatively much less accurate than the contemporaneous measure. Nevertheless, a small subset of individual forecasters were generally inferior to the known, prior consensus forecast.     

转炉除尘水用于模拟含硫烟气脱硫的实验研究

本文进行了转炉除尘水脱除模拟含硫烟气中二氧化硫的实验研究。通过连续实验考察了pH值、Fe2 浓度以及脱硫率等的变化规律并对FeO溶出率进行了测定;通过模拟实验发现,保持除尘水更新率4%.min-1左右可以使除尘水pH值稳定在5～6.5之间;在参数优化的条件下用转炉除尘水进行模拟烟气脱硫,可以实现90%以上的脱硫率和相对稳定的Fe离子浓度和pH值.实验研究结果为转炉除尘水脱除钢铁联合企业烧结机所排烟气中二氧化硫的工业应用奠定了良好的基础.     

茶叶拼配专家系统的知识组织和规化求优

介绍出口茶叶拼配专家系统 TBES 的设计思想和实现技术,阐述了其中多种知识表示、组织和管理的方法及技巧。文章着重介绍了用推理机实现拼配和线性规划实现优化的复合机制及算法。     

日语中和“木”有关的表达方式

日本是森林大国，因此日语中和树木有关的表达方式极其丰富。本文拟就日语中和树木有关的表达方式做一个总结，强调了日本的“木”文化对日语表迭起到的作用以厦由此形成的特色．旨在将文化学习与语言学习有机地结合起来。     

高校旅游人才供需失衡分析--以江苏为例

旅游业人才需求空间巨大，然而高校旅游人才行业的流失率却居高不下，供需矛盾凸显，本文以江苏为例，通过抽样调查，分析得出学生期望的薪酬与企业成本因素、个人发展与企业发展失调、企业期望学生具备的知识结构、工作经验、能力与实际的差异是供需错位问题的主要因素，在此基础上提出相应的对策建议。