一类复迭代系统的分形生成与图形若干因素分析

提出加入修正参数ε的算法，生成了复迭代系统Zk 1=f(λk,Zk,Z^-k）的分形图(适用于任意正负整数阶)，并通过计算机图示实验对影响其对应分形的因素进行了分析。     

蓄热式加热炉燃烧控制算法研究及应用

蓄热式加热炉是通过蓄热室热交换的高温空气燃烧技术，利用纯高炉煤气为燃料，具有高效烟气余热回收、低污染排放等优点，在工业生产中应用越来越广泛。由于蓄热式加热炉采用左右两侧空气、煤气交替切换燃烧，在切换期间其温度对象处于非控状态，切换周期为3—5min，常规的双交叉限幅燃烧控制策略巳不再适用。本文运用神经网络方法在线建立当前工况下温度控制平衡工作点，在此基础上通过模糊控制策略实现蓄热式加热炉温度控制，实际应用结果表明这种控制策略有效解决了蓄热式加热炉切换燃烧控制问题。     

锑对蠕铁组织和性能的影响

试验研究了元素锑对蠕铁石墨形态、基体组织及性能的影响。结果表明，锑使球墨变得更加圆整，球径更小，同时细化蠕虫状石墨．增加蠕墨数量，强烈促进基体珠光体化，提高基体硬度；适量锑提高抗拉强度，降低蠕铁断面敏感性。     

热压过滤诸影响因素的研究

设计了一套实验室型热气体压滤机,在此设备上进行了热压过滤实验,研究了一些操作因素对浮选精煤过滤效果的影响。结果表明：在热压过滤条件下,可以提高过滤速度,并有效地降低滤饼水分,浆体浓度、气体温度、过滤压差和吹气时间都对过滤有较大影响。     

洁净煤气化工艺浅析

从环境保护、煤种适应性和煤利用效率方面阐述了洁净煤气化工艺的特点,介绍了德士古水煤浆气化和壳牌粉煤气化工艺,从煤种适应性、氧气消耗、碳转化率、热效率及合成气有效成分方面对这2种工艺进行了对比。结果表明,壳牌煤气化是洁净煤气化技术的发展方向。     

A new corrosion protection coating system for pressure-cast aluminium automotive parts

A simple to employ corrosion protecting coating based on sol-gel derived new nanocomposites for Al alloys has been developed. This composite coating reacts to the Al surface by formation of a thermodynamically stabilized interface. Moreover, for pressure cast Al, the coating process can be used for sealing the pores at the same time.     

Pozzolanic behaviour of bagasse ash

The CBRI investigations indicate that bagasse ash has to be considered as a pozzolanic material like fly ash or any other conventional pozzolana. High surface area is required to expose the grains which are coated with iron oxide and carbonaceous impurities. The authors consider that the material may be used for preparing lime ash mixture to be used locally as a mortar, especially in rural areas where availability is high.     

UNEP assesment of the Montreal protocol: Refrigeration within the framework of the technology review

In order to provide a scientific and technological basis for adjustments and amendments to the Montreal Protocol (which was conceived and adopted in 1987), a large number of reports were made by international experts in 1989. These reports are used in the assessment procedure which takes place in the period June 1989–June 1990, after which period final decisions will be made by the Contracting Parties in the so-called ‘Second Meeting of the Parties’. In this contribution the assessment process and the time schedule of the whole procedure is described. One of the Panel Reports centres on a Review of the Technology; conclusions from this report are presented. In its turn, information in this report is based on sector reports, one of which is the Options Report ‘Refrigeration, AC and Heat Pumps’. Specific topics dealt with in this sector report are presented here. Some concluding remarks on the findings presented in the reports and on possible future reassessments are given.     

落叶松早落病危害的光谱特征及与叶绿素浓度的关系研究

森林病虫害是影响森林健康的主要因素之一，全面、准确、迅速地对森林病虫害进行监测管理必须依靠先进的技术手段。利用光谱特征研究落叶松受害情况及叶绿素浓度变化情况，将落叶松的受害程度分为4个等级，选取了11组不同受害程度叶片的叶绿素、类胡萝卜素的浓度及相应的光谱反射率数据进行分析。结果表明，不同健康程度的光谱反射率有4个明显差别之处，分别在绿峰、吸收谷、“红边”位置及水分吸收带；随着受害程度的加重，“红边”位置“蓝移”，叶绿素反射峰“红移”明显。不同健康程度的落叶松叶片的“红边”拐点波长位置、吸收谷与其叶绿素浓度之间具有较强的相关性，为高光谱数据研究森林病虫害提供了方法和途径。     

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天然气工业某些领域具有自然垄断特征，必须要使行中的市场机制和政府行为相互协调，才能维护社会公平和社会效率。前苏联采取完全的政府控制，一定程度上阻碍了天然气的发展；英美等国通过协调政府行为和市场机制，促进了天然气工业的发展。我国天然气发展面临的最大困难是市场的培育，市场和政府行为的关系没有理顺。文章通过对世界各国采取政府行为的历史、 现状和原则的分析，结合我国天然气工业发展现状，指出了适合我国天然气工业发展的政府管理原则，即建立透明监管体制，协调政府和市场的关系，促进天然气市场发育。