深大露天矿综合开采工艺主要设计参数的研究

深大露天矿的间断向半连续开采工艺过渡时，合理深度及半连续开采工艺的移设步距是两个重要的开采参数，对矿山的经济效果影响巨大，本文首次提出采用组合台阶单位体的开采来分析确定这两个重要的参数，得到的结论在霍林河煤矿的应用中取得了满意的结果，对其它类似矿山具有应用价值。     

激光光束质量因子M~2的物理概念与测试方法

激光光束传输质量因子Ｍ２是一种全新的描述激光光束质量的参数，它能定量表征单模、多模光束传播特性。本文介绍Ｍ２的物理概念、特点、测试方法及近年来国外的研究概况。     

多缝式烧嘴点火器在攀钢烧结生产中的应用

多缝式烧嘴点火器具有燃烧效率高，火焰长度易调，炉膛温度分布合理等优点，经工业试验证明，该点火器能满足攀钢烧结点火工艺要求，并有明显节能效果。     

Microstructure study of Sm,Mn-modified PbTiO3 piezoelectric ceramics by XRD profile-fitting technique

By using the X-ray diffraction profile-fitting technique, the microstructures of Sm, Mn-modified PbTiO₃ piezoelectric ceramic discs, including ferroelectric domain sizes, microstrains, and their variations with the poling strength have been quantitatively investigated. The results manifest that the modified PbTiO₃ ceramics contain a high density of domain walls due to the presence of finely-divided coherent domain structures (tens of nanometres in dimension). The poling treament can evidently influence the domain-size distribution, with a more homogeneous microstructure being developed; however, it simultaneously causes high anisotropic microstrains within the structure which, together with the high density of domain walls, is expected to be responsible for the unusual high electromechanical coupling properties possessed by this material.     

化工防腐蚀涂料应用情况介绍

介绍了氯磺化聚乙烯涂料、改性聚苯乙烯涂料、环氧树脂类涂料、水冷器涂料、抗静电涂料等涂料的性能、用途和在洞庭氮肥厂的使用情况.同时对几种涂料施工方案进行了比较.     

Analysis of simian hemorrhagic fever virus (SHFV) subgenomic RNAs, junction sequences, and 5' leader

Full-length simian hemorrhagic fever virus (SHFV) genome RNA (about 15 kb in length) and six subgenomic RNAs, ranging in size from 0.65 to 4.7 kb, were detected by Northern blot hybridization in MA104 cytoplasmic extracts with a 3' genomic antisense probe. The 5' regions of the two smallest subgenomic RNAs (RNAs 6 and 7) were cloned and sequenced. Sequence analysis indicated that these two RNAs contained a common 5' leader sequence joined to the subgenomic RNA bodies via a highly conserved junction sequence; the junction sequence of RNA 7 was 5'-TTAACC-3', while that of RNA 6 was 5'-TCAACC-3'. The complete 5' leader sequence (208 nt) was obtained from genomic RNA. The genomic 5' junction sequence is identical to that of RNA 7. Northern blot hybridization with an antisense 5' leader probe confirmed the presence of the complete leader sequence in all six species of subgenomic RNA. In its virion morphology, genome size, gene order, and replication strategy, SHFV is most similar to viruses such as equine arteritis virus, lactate dehydrogenase-elevating virus, and Lelystad virus/porcine respiratory and reproductive syndrome virus.     

加入WTO对我国水利科技工作的影响及对策

加入WTO后，对我国水利科技发展的影响主要表现在：研究开发活动、技术标准和知识产权保护方面，为适应WTO的各项规则，履行我国政府所作出的承诺，必须调整水利科技政策和发展战略，促进我国水利科技事业的健康发展。     

一种系统信息提示的方法及其在汇编程序设计中的实现

本文介绍了系统信息提示的一种方法，井重点讨论了用８０８８汇编语言实现的方法。它采用基本信息串表和索引表，对于使用频度较高的系统，可以大大节约系统内存，具存较好的实性用。     

炼油厂区内新建项目改扩建施工现场灭火器配置的分析

在对石油化工改扩建工程施工现场火灾危险因素识别评估的基础上，判定现场火灾危险等级、火灾类别，对灭火级别和保护距离进行验算，提出施工现场灭火器选型和配置方案。     

A force modulation study on crystallization process in ferroelectric vinylidene fluoride and trifluoroethylene copolymer films

This paper introduces the Force Modulation technique to the study of crystallization process in ferroelectric vinylidene fluoride and trifluoroethylene copolymer films. Using this technique we have successfully visualized ferroelectric crystalline domains and observed that these ferroelectric domains grow out from amorphous phase, unite into strip-like structures, and finally congregate into a union. Force Modulation can weaken the influence of topography on imaging of ferroelectric domains, and reveal more details, which are difficult to be observed in topographical image.