粉粒状物料透气性系数的测定

对经过分级的六种均齐粉粒状物料进行透气性系数测定。结果表明:球形小米颗粒((?)_p=1.70mm),透气性系数K=1.191×10~(-9)m~2,在整个固定床范围内都符合达西定律;石灰石粉((?)_P=0.900mm),K=5.831×10~(-10)m~2。文中还讨论了达西定律的适用依据和透气性系数的影响因素。     

单片机控制的可变正(余)弦函数发生器

介绍一种用单片机控制的结构简单、成本低的正(余)弦函数发生器,论述了其基本原理,给出了硬件框图和软件框图,可用于计算机控制的调速系统中。     

新型连续装载机工作机构的图解设计法

本文介绍了新型连续装载机工作机构图解设计的一般规律,对某些技术参数的确定作了初步探讨。     

BM-20Д2型排粉机轴封漏粉改造

阐述了漳泽发电厂二期BM-20Д2型排粉机轴封漏粉原因、轴封结构及改造方法。     

数学中的探索研究和发现

本书是一本关于数学“解题术”的论著，其目的是引导中学生和大学低年级学生通过解数学题提高思维能力和解题技巧，着重培养他们数学学习中的探索精神，以研究解题规律和发现新的问题和结果。     

Ontology-Based Semantic Annotation for Problem Set Archives in the Web

0 IntroductionAsneim mapnotircta nWte pbre i-sco tnhdieti oabnilfiotry r etaoli zainnngotthatee go aWle obf trhe-esources with semanticinformation[1]. However ,annotationtools so far basically allowthe user to annotate with plaintext using the method of information extraction.In manycases ,one can hardly extract semantics from Web docu-ments ,such as problemset archivesinthe Web.Massive problemset archives are availableinthe Web,for example,http://acm.uva.es, while each problemsetarchives pr…     

零售业销售数据关联规则挖掘算法关键思想研究

对零售业销售数据关联规则挖掘算法的关键思想进行了研究，给出了各种提高算法效率的方法以及对规则选择的方法。     

SIMULTANEOUS REACTION AND LIQUID-LIQUID EXTRACTION IN THE HYDROGEN PEROXIDE PRODUCTION

The gas-liquid-liquid reactive extraction system for preparing hydrogen peroxide via anthraquinone was investigated. The oxidation reaction of hydrogenated working solution was combined with the extraction of hydrogen peroxide from working solution in a sieve plate column. The reaction of 2-ethylanthrahydroquionone with oxygen and the liquid-liquid extraction of hydrogen peroxide take place simultaneously. The oxygen was introduced with hydrogenated working solution through a nozzle in the bottom of the column, which worked as agitated air as well as oxidation reagent. The results showed the oxidation and extraction do not hamper each other, on the contrary, the presence of oxidation gas in the column can promote the transfer of hydrogen peroxide from organic phase to aqueous phase, thus the reaction efficiency and extraction efficiency increased with increasing gas superficial velocity. Furthermore, the oxidation efficiency is almost 100% and the extraction efficiency is higher than 90% in this process.     

论会计电算化的现状及发展趋势

简述了我国会计电算化的现状，并从管理认识和组织方面，会计软件方面以及人员素质与电算化方面分析了我国会计电算化工作中存在的问题，指出会计电算化的发展趋势为会计软件由核算型向管理型发展，由封闭型向开放式、网络型发展，且网络财务软件将建立“APS商务服务”，为中小企业在尽量不提高成本的前提下参与竞争提供契机。     

黏度在炼铁生产中的作用分析

黏度是流体的一个重要物理量。炼铁高炉内炉料，最终产生两个液相：铁水扣炉渣。炉渣黏度对炼铁生产有重大实际意义。通过分析炉渣黏度对高炉冶炼的作用，提出了调控炉渣黏度的有效措施。