延长锰硅合金矿热炉出铁口寿命的初步探讨

阐述了锰硅合金矿热炉出铁口损坏的机理。有针对性的采用了一些维护措施，延长了出铁口的使用寿命，改善了炉况，提高了产量，降低了生产成本，获得了一定的经济效益。     

控冷电磁站搬迁方案的改进

通过大量的调查研究，查清了电磁站内渗漏水的缺陷，提出了解决方案和具体操作方法，改变了原定的搬迁方案，不仅彻底地消除了缺陷，还节约了大修费，缩短了工期，为生产创了可观的效益。     

ZDRH-2000智能集中润滑系统在435m~2烧结机上的应用

邯钢435m2烧结机采用了ZDRH-2000智能集中润滑系统克服了传统润滑的弊端;降低了能源的消耗;减少了备品备件的消耗;大大减少了设备日常维护的工作量;提高了设备生产效率;降低了生产成本。     

民主革命时期中国共产党农业政策对政局的影响

民主革命时期,中国共产党在充分调研基础上制定的农业政策使其社会动员能力发挥到极致,成功地调动了占中国人口绝大多数的农民的政治斗争热情,巩固了中国共产党政权的政治基础;其农业政策调动了农民的生产积极性,发展了农业生产力,保证了战争条件下的军粮民食供给,奠定了革命胜利的经济基础;其农业政策改变了农村阶级力量对比,颠覆了传统农村社会秩序,完成了农村社会秩序的重建,莫定了新民主主义革命胜利的社会基础,最终夺取了全国政权.     

抓斗吊车常见故障与解决措施

分析了20 t桥式抓斗起重吊车常见故障及原因,采取了相应的解决措施,从根本上杜绝了吊车的常见故障、节约了备件、降低了生产成本、减轻了维修人员劳动强度及提高了企业的经济效益.     

焙烧炉天然气燃烧自动控制系统的研究与应用

介绍了炭素焙烧炉燃烧系统的改造,新型控制系统的功能介绍、使用效果和效益分析,通过改造真正实现了清洁生产,达到了节能效果,改善了工艺水平,提高了产品质量,降低了生产成本,提高了生产效率,改善了工作环境。     

变频器在4#空分油泵控制系统上的应用

叙述了天铁动力厂4#空分系统辅助油泵应用EV2000变频器控制系统的过程,对运行中出现的溢油、油压波动不稳等故障现象原因进行了分析,提出了改进方案.改进后消除了故障现象,实现了闭环控制油泵的转速和启停,减小了对电机和电网的冲击和振动,提高了设备的可靠性,延长了电机使用寿命,保障了生产的顺利进行.     

高热区水冷保护技术的应用

分析了水冷保护技术在加热炉出炉辊道的应用，大大降低了工人的劳动强度，减少了事故检修时间，降低了材料、备件消耗，取得了可观的经济效益，为生产顺行、高产提供了有力的设备保障。     

小铁山矿充填工艺的应用优化与发展

本文针对小铁山矿充填系统设计及生产实际中存在的问题,通过充填工艺的改进和参数的优化,提高了充填接顶率,保证了充填质量,确保了安全生产,降低了矿石的损失和贫化,避免了西部充填频繁爆管的发生,降低了充填成本,提高了矿山的经济效益,保证了矿山的持续、稳定发展。     

TRT顶压控制系统及其安全性的研究与优化

介绍了天钢1~#TRT顶压控制系统,对现有的顶压控制系统进行了分析,在原有差压调节模式的基础上增加了顶压调节模式,将实际操作改为差压调节与顶压调节两种互选模式,提高了系统的发电效率;对旁通阀组的控制进行了优化,优化后极大地提高了系统的安全性,保证了炉顶压力的稳定,延长了设备的使用寿命,产生了较高的经济效益。     

Ovarian volume in gynecologically healthy women using no contraception, or using IUD or oral contraception

OBJECTIVE: The aim of this study was to determine the ovarian volume by transvaginal ultrasonography in a gynecologically healthy population of women using no contraception, using intrauterine contraceptive device, or using oral contraceptive. MATERIALS AND METHOD: The study had a cross-sectional design. The ovaries of 428 women aged 1445 who contacted the family planning clinic in the county of Funen were examined. Most of the statistical analyses were carried out using standard techniques. However polynominal regression analysis was used to model ovarian volumes as a function of the day of cycle. RESULTS: No differences between the volumes of the right and the left ovary were found in any of the groups. Significant differences were found between the ovarian volumes of the three groups. The ovarian volumes were found to be largest in women using intrauterine contraceptive device, lesser in women using no contraception and smallest in women using oral contraception. A significant difference was found of the ovarian volumes throughout the menstrual cycle in women who were not using oral contraception. The ovarian volumes did not change throughout the menstrual cycle in women using oral contraception. In women not using oral contraception the largest ovary increased in volume from the start of the cycle to day 19, thereafter the volume declined. No evidence of any change of volume over the menstrual cycle was found in the smallest ovary and, for women using oral contraception, both ovaries. There was no correlation between age, height, weight, parity, and ovarian volume in any of the groups. CONCLUSION: The ovarian volumes, in gynecologically healthy women using intrauterine contraceptive device, are larger than in women using no contraception. It appears that oral contraception reduces the volumes of both ovaries in all phases of the menstrual cycle to equal levels.     

气体流量及水口底部形状对板坯结晶器内流场影响的水模型试验

采用1:1水模型研究了气体流量（010 L/min）和水口底部形状（凹底和尖底）对结晶器内流场的影响。在结晶器断面为230mm×1 200 mm,浇铸速度为1.6 m/min的模拟工况条件下,凹底水口其流体形态优于尖底水口;在结晶器液面波动稳定性方面凹底水口亦优于尖底水口;气体流量在08 L/min,使用尖底水口的流体其表面流速明显高于使用凹底水口的流体;对凹底水口而言,气体流量超过8 L/min,其流体表面流速低于0.2 m/s;120炉IF钢生产结果表明,使用优化的凹底水口和吹氩流量7 L/min,浇铸过程结晶器液面波动在±3 mm以内,铸坯夹杂物比优化前降低24%。     

Estimation of Degree of Consolidation for Vacuum Preloading Projects

The degree of consolidation is usually used as one of the criteria for assessing the effectiveness of soil improvement work using the fill surcharge or vacuum preloading method. It is also often used as a design specification in a soil improvement contract. Degree of consolidation is normally calculated using settlement data. However, as the effect of vacuum preloading is controlled largely by pore water pressure changes, it is necessary to analyze the pore water pressure variations and to assess the degree of consolidation using pore water pressures. In this paper, the problems involved in the estimation of degree of consolidation using settlement data are discussed. A method to estimate the average degree of consolidation using pore water pressure data is suggested. Two case studies are presented to examine the characteristics of the pore water pressure variation of soil under vacuum loading. The degree of consolidation achieved in each of the two cases is assessed using pore water pressure data and compared with that estimated using settlement data. Factors affecting the degree of consolidation assessment are discussed.     

含铁尘泥压块高温强度劣化规律及机制

摘要：基于Oxycup工艺,以高炉工序的重力除尘灰和转炉工序的转炉污泥作为主要原料,配加一定量的粘结剂制成复合压块,通过开展模拟实验和基础分析,研究含铁尘泥压块强度的劣化规律和劣化机制。结果表明：水泥粘结剂的加入能有效抑制含铁尘泥压块的体积膨胀,稳定含铁尘泥压块的内部结构,从而保证含铁尘泥压块的高温强度;水泥粘结剂压块的致密度要高于羧甲基纤维素钠粘结剂压块,且在水化过程中会生成氢氧化钙,会对铁氧化物还原起到一定的促进作用,从而使得水泥粘结剂压块的还原性强于羧甲基纤维素钠粘结剂压块;水泥粘结剂压块由于水泥石相固结作用的存在,使压块强度有了显著的提高,随着温度的提高,水泥粘结剂逐渐失效,但失效后的水泥石仍能保持一定原始形态,能够稳定压块的内部结构,使压块强度劣化的同时仍能保持一定的基础强度。     

转炉冶炼特殊钢的生产现状

分析了国内外特殊钢的生产状况,比较了转炉冶炼特殊钢与电炉冶炼特殊钢的优势和劣势,详细地介绍了本钢利用转炉冶炼特殊钢的工艺流程和生产现状,提出了未来的发展趋势。     

Accuracy of leg length prediction in children younger than 10 years of age

In this study, the authors attempted to predict the ultimate leg length in normal children with normally growing legs, using Green-Anderson and Moseley techniques with chronologic and skeletal age. The predictions were based on serial growth studies of children between 5 and 10 years of age. Using skeletal age for prediction, the absolute mean error in predicting the ultimate leg length was 2.4 cm using the Green-Anderson method and 2.58 cm using the Moseley method. Using the Moseley method for length prediction in boys, the mean error was 3.8 cm using skeletal age and 1.5 cm using chronologic age. For girls, using the Moseley method of leg length prediction, the mean error was 1.55 cm with skeletal age and 2.46 cm with chronologic age. The significance of this study is that skeletal age, as determined by the Gruelich and Pyle Atlas, does not improve the accuracy of prediction of ultimate leg length in children younger than 10 years of age, except in girls with advanced bone age.     

Present status of computerization in routine pathology work in Japan: a questionnaire survey and its analysis

A total of 71.7% of the institutions surveyed were using computers, and most of the institutions not using computers were considering their introduction. Large computers were being used by 36% of the institutions and personal computers (PCs) by 61%. With regard to software, 88% of the large computers had been programmed by professionals, while 76% of the PCs were using commercially available software. The wide difference between the software used by the two types of computer makes it advisable to discuss them separately. The details on the patients at the stage of specimen registration was received on-line in 57% of institutions using large computers but in only 5.7% of those using PCs. Coding had been implemented in 47% of institutions using large computers and in 16% of those using PCs. The rate of use for case reference was 55% for large computers and 44% for PCs. References using a register as well as codes and letter data were also observed. It is considered that a wide-ranging method of reference will probably lead to better ideas than a scrupulous method. In the present survey, 59% of institutions using large computers and 35% of those using PCs replied that system improvements were troublesome. The only way to ensure the privacy of patients and the protection of pathological data is to enhance awareness among medical doctors and paramedical personnel. It is hoped that some organization will lead the way in collecting computer information on pathology duties and make this available free of charge.     

Pullout Resistance of Individual Longitudinal and Transverse Geogrid Ribs

This paper presents an evaluation of the soil-geogrid interaction, conducted to quantify the contributions of passive and interface shear mechanisms to the overall pullout resistance of geogrids. An experimental testing program was conducted in this investigation using both large-scale and newly developed individual-rib pullout devices. The large-scale pullout tests were conducted using uneasily coated geogrid specimens with and without transverse ribs. On the other hand, the individual-rib pullout tests were conducted using individual longitudinal and transverse ribs. A stress transfer model was implemented to predict the results of large-scale pullout tests using the parameters obtained from the individual-rib pullout tests. Good agreement was obtained between the results of large-scale pullout tests and the predictions obtained using parameters collected from individual-rib tests. For the dense mesh geogrids used in this investigation, the development of passive mechanisms in front of geogrid transverse ribs was found to influence significantly the interface shear mechanisms that develop along longitudinal ribs.     

轧钢系统工业水综合使用结构的合理性探讨

通过对轧钢系统的用水结构、软化水罐反洗水的主要分子含量以及危害的分析,阐述了合理利用水资源,调整用水结构,最大限度的提高水的回收利用率,降低水资源的消耗的重要性。     

铬天青S光度法测定锰矿石中的三氧化二铝

基于铝与铬天青S在pH为5.4～5.7的微酸性介质中形成稳定的紫红色配合物,研究了采用铬天青S光度法测定锰矿石中的三氧化二铝。结果表明:铁、钛的干扰可以抗坏血酸和苦杏仁酸消除;基体元素锰的干扰,在以稀盐酸提取熔融物时加入无水乙醇还原锰酸盐、再加盐酸羟胺消除;用国家标准样品进行验证,结果满意。与国标方法相比,该法简便,快速,易于掌握,而且分析成本低,不使用大型仪器,具有推广和应用价值。