添加高效粘结剂的氧化锰矿粉冷固成团

以氧化锰矿粉为原料，添加ＺＢ粘结剂进行冷固成团，所得冷固团块不仅具有足够的机械强度，而且具有良好的耐湿性，适用于长距离运输和露天堆存，是一种可与块矿性能相媲美的优质炉料，为充分利用矿山及冶炼厂的锰矿粉找到了一条良好的途径．     

云南锰矿选矿现状与前景分析

云南锰矿资源丰富,具有品位高、低磷低铁、易选等特点。文章概述了斗南、鹤庆、建水等锰矿的选矿科研进展情况,三个锰矿均可采用强磁选或磁-重选流程选别,可提高品位8—12％;精矿含锰可达33—35％,锰回收率在80％以上的好结果。     

Analysis and visualisation with host-based software – The features of STNAnaVist™

This article is based on experiences with data and text mining to gain information for strategic business decisions, using host-based analysis and visualisation (A/V), primarily in the field of patents. The potential advantages of host-based A/V are pointed out and the features of the first such A/V software, STN^®AnaVist™, are described in detail. Areas covered include the user interfaces, initial set of documents for A/V, data mining, text mining, reporting, and suggestions for further development.     

广西天等贫氧化锰矿石的选矿试验研究

天等锰矿石属高硅、低磷贫氧化锰矿石，矿物结晶粒度微细。选矿试验中进行了洗矿、强磁和重选流程研究，试验结果表明，洗矿效果较好，当原矿含锰１６．８５％，经一段洗矿后，可获得含锰２９．７７％，锰回收率为８６．２７％的锰净矿。     

一起氧气瓶燃割事故分析

20 0 2年 5月 30日晚 7:5 5 ,徐州市工程集团某机械厂下料车间 ,氧气汇流排中一只即将开启使用的氧气瓶发生燃烧击穿事故 ,造成一死一伤的严重后果。事故发生的第二天笔者被特邀赶到现场 ,会同调查组对事故的性质、原因进行分析鉴定 ,并通过了原因分析鉴定结论。为防止此类事故的再次发生 ,引起充装或使用单位的足够重视 ,从中吸取教训 ,把事故消灭在萌芽状态 ,减少不必要的损失 ,现将这起氧气瓶燃割事故介绍如下。1　钢瓶及汇流排的原始情况钢瓶为河北涿鹿高压气瓶制造厂生产 ,气瓶原始数据如下 :气瓶编号 0 85 15 ,水压试验TP2 2 5 ,工…     

Determination of the content of wax esters in some sea foods and their molecular composition. A comparison with ω-3 enriched wax esters

Wax esters enriched in ω-3 fatty acids have been recently shown to be readily absorbed by rats after dietary supplementation. Wax esters are less prone to oxidation and can be better formulated than liquid ω-3 derivatives. All these characteristics suggest a possible use of wax esters enriched in ω-3 as food supplements. However, some naturally occurring wax esters are defined as scarcely digestible (jojoba oil, spermaceti). On the other hand, wax esters have been found in several sources of marine origin, which can enter normal foodstuff. In order to better understand the digestibility of wax esters, we have analysed some foods from marine sources. The content of triglycerides and wax esters of the foods has been determined. Moreover, wax esters have been analysed for their composition in alcohols and fatty acids. Wax esters have been shown to be a part of the neutral lipid extract of the foods analysed. Their content, if compared with the content in triglycerides, shows striking differences. In the case of two botargo preparations, it has been shown that wax esters are more than 90% of the total neutral lipid extract. The content of fatty acids and alcohols found in the foods analysed is consistent with published data.     

日本锰质合金生产与锰矿石的消耗

本文全面介绍了日本近年特别是1990年锰矿石进口量和锰铁合金的生产情况。同时还介绍了锰质合金、电解金属锰和电解二氧化锰的进出口情况。日本1990年进口锰矿石143万t,高碳锰铁4.6万t,中、低碳锰铁0.3万t,硅锰21.8t。还列出了进口矿石和硬质合金来源国数量。此外,还介绍了日本重点锰质合金厂的产品。     

X荧光光谱法测定不锈钢的研究

本文论述了Ｘ荧光光谱测定高铬钢和不锈钢的分析方法，用理论α系数校正基体效应和用谱线干扰系数Ｌ校正谱线重叠影响。方法准确度和精度令人满意，操作十分简便、快速。     

Networks for sorting multitonic sequences

Lee and Batcher have designed networks that efficiently merge k separately provided sorted sequences of known lengths totalling n. We show that the design is still possible, and in fact easier to describe, if we do not make use of the lengths, or even the directions of monotonicity, of the individual sequences—the sequences can be provided in a single undelimited concatenation of length n. The depth of the simplest resulting network to sort sequences that are “k-tonic” and of length n is , generalizing Batcher's 1968 results for the extreme values of k (k=2 corresponding to merging, and k=n/2 corresponding to general sorting).The exposition is self-contained and can serve even as an introduction to sorting networks and Batcher's results.     

Robust pole clustering in a good ride quality region of aircraft for matrices with structured uncertainties

This paper presents a general analysis of robust pole clustering in a good ride quality region (GRQR) of aircraft for matrices with structured uncertainties. This region is an intersection of a ring and a horizontal strip, located in the left half-plane, which is a specific non-Ω-transformable region providing good ride quality of aircraft. The paper applies the Rayleigh principle along the norm theory to analyze robust pole clustering within this region since the generalized Lyapunov theory is not valid for non-Ω-transformable regions. Concerned uncertainties are structured/parametric uncertainties, including interval matrices. The results are useful for robust control analysis and design, especially, of robust good ride quality of aircraft, shuttles, vehicles and space station, as well as some industrial systems. An example of the F-16 dynamics for which GRQR is suitable is included to illustrate the results.