炼钢厂4^#转炉、连铸机自控系统扩容改造

莱芜钢铁集团有限公司炼钢厂4^#转炉、连铸机自控系统改造，汲取国内外各大钢铁企业成功经验，立足本身特点，在多项技术上有所创新，主要有：红外定尺技术；无副枪动态炼钢技术；双机热备技术；身份识别和分级管理技术；操作跟踪技术；串口设备与以太网联接技术的研究和应用。该项目实现了转炉炼钢的过程控制和冶炼过程的动态监控；同时连铸机高效化改造得以实施，基本解决了物流、信息流瓶颈；身份识别和操作跟踪等技术的应用，适应了企业生产管理和设备管理的安全性要求。项目的成功实施丰富了系统控制功能，提高了可靠性、稳定性，促进了生产效率的提高，设备产能提高30％以上，达到了扩容改造的目的，满足了扩容生产的实际需求。     

粉末轧制成形技术研究进展

介绍了粉末轧制过程，论述了粉末轧制技术的工艺参数、技术改进和以其为基础开发的半固态粉末轧制技术，阐述了近些年来粉末轧制技术的应用情况，最后对这些技术进行了总结和展望。     

宣钢原料改善与炼铁技术进步

对近年来宣钢原料质量改善与炼铁技术进步进行了总结和分析，原料质量的改善和提高，炉料结构的优化，技术改造的实施和投入，技术操作水平的提高和加强，使炼铁技术经济指标得到较大幅度提高，推动了宣钢炼铁技术的进步。     

物探技术在异常地质构造勘探中的应用

在地质勘探领域，综合物探技术与互联网+信息通信技术的结合具有广阔的应用前景，并为信号采集和数据收集提供了科学支持。目前，传统行业的工程技术在物探行业和科技发展方面仍存在一定的地域性和局限性。因此，本文针对地质勘探技术中的综合物探技术原理进行了简要的理论分析，并从实践情况出发，探讨了综合物探技术的优缺点。文章还对更多的数据和实践经验进行了系统分析，提出了更优质的物探技术综合分析，供参考使用。     

我国铜加工技术的发展现状

改革开放以来，我国铜加工行业引进设备和技术改造同步进行，取得了显著成绩，铜加工技术有了较大的发展，笔者结合国外先进铜加工技术的发展情况，对我国铜加工技术的发展现状进行了分析，并提出了我国铜加工技术今后的发展方向。     

三维数字化技术在矿山基建和生产中的应用

三维数字化技术是建设数字矿山的核心技术，随着计算机与现代采矿技术的发展，该技术已应用于矿山基建和生产的方方面面，从矿山的人工开采到大型机械装备，从数字化地形图的绘制到矿山数字模拟，从利用数据库管理矿山资源到“智能矿山”等等。介绍了三维数字化技术的内涵，三维地质模型数据库的信息采集、建模和赋值过程，以及三维数字化技术在井巷工程优化、矿山生产组织、矿山安全管理和矿山巡查中的具体应用情况。三维数字化技术的应用，提升了资源开发安全管理水平，加速了矿产资源的开发，节约了采矿成本，提高了采矿效率，稳定了选矿指标，降低了选矿成本。     

我国钢铁工业技术引进情况及关于引进国外技术的几点建议

介绍了我国钢铁工业为赶超世界钢铁生产技术的先进水平。１９８０年以来从国外引进先进技术和设备的情况，论述了引进的先进技术和设备在鞍钢，宝钢，武钢等特大型钢铁企业的技术改造，科技开发和生产经营中的发挥的作用，分析了引进技术和设备在钢铁生产中产生的经济效益，评价了我国钢铁工业对从国外引进的技术和设备的消化，吸收及创新情况，邮有关引进国外技术的具体建议。     

我国炼铁生产技术进步的回顾及对今后发展的思考

回顾了９０年代我国炼铁生产技术的进步，高炉生产得到了很大的发展，生铁产量跃居世界第一位，高炉技术经济指标得到大幅度改善，在高炉现代化，大型化，喷煤和长寿技术方面取得了长足的进步，展望了今后炼铁生产技术的发展。     

微波烧结技术的进展及展望

简要介绍了微波烧结的发展历程、基本原理和技术特点，结合微波烧结的技术进展，分析了微波烧结技术的关键因素，并对微波烧结技术的前景作出了估计和展望。     

铜精矿自动取样技术的研究与应用

首先介绍了国内外普遍采用的铜精矿原料取样方法，通过分析该方法的优劣，阐明了自动取样技术的优势和必要性。其次，阐述了自动取样技术的研究过程和研究方法，通过现场试验，验证了自动取样技术的效果。自动取样技术经转化应用，可以替代人工作业，实现自动化无人取样。因此，该技术具有良好的推广前景。     

Inactivation of single cardiac Na+ channels in three different gating modes

In small cell-attached patches containing one and only one Na+ channel, inactivation was studied in three different gating modes, namely, the fast-inactivating F mode and the more slowly inactivating S mode and P mode with similar inactivation kinetics. In each of these modes, ensemble-averaged currents could be fitted with a Hodgkin-Huxley-type model with a single exponential for inactivation (tauh). tauh declined from 1.0 ms at -60 mV to 0.1 ms at 0 mV in the F mode, from 4.6 ms at -40 mV to 1.1 ms at 0 mV in the S mode, and from 4.5 ms at -40 mV to 0.8 ms at +20 mV in the P mode, respectively. The probability of non-empty traces (net), the mean number of openings per non-empty trace (op/tr), and the mean open probability per trace (popen) were evaluated at 4-ms test pulses. net inclined from 30% at -60 mV to 63% at 0 mV in the F mode, from 4% at -90 mV to 90% at 0 mV in the S mode, and from 2% at -60 mV to 79% at +20 mV in the P mode. op/tr declined from 1.4 at -60 mV to 1.1 at 0 mV in the F mode, from 4.0 at -60 mV to 1.2 at 0 mV in the S mode, and from 2.9 at -40 mV to 1.6 at +20 mV in the P mode. popen was bell-shaped with a maximum of 5% at -30 mV in the F mode, 48% at -50 mV in the S mode, and 16% at 0 mV in the P mode. It is concluded that 1) a switch between F and S modes may reflect a functional change of inactivation, 2) a switch between S and P modes may reflect a functional change of activation, 3) tauh is mainly determined by the latency until the first channel opening in the F mode and by the number of reopenings in the S and P modes, 4) at least in the S and P modes, inactivation is independent of pore opening, and 5) in the S mode, mainly open channels inactivate, and in the P mode, mainly closed channels inactivate.     

Dual modes of aging in Mediterranean fruit fly females

The life history of medflies is characterized by two physiological modes with different demographic schedules of fertility and survival: a waiting mode in which both mortality and reproduction are low and a reproductive mode in which mortality is very low at the onset of egg laying but accelerates as eggs are laid. Medflies stay in waiting mode when they are fed only sugar. When fed protein, a scarce resource in the wild, medflies switch to reproductive mode. Medflies that switch from waiting to reproductive mode survive longer than medflies kept in either mode exclusively. An understanding of the physiological shift that occurs between the waiting and reproductive modes may yield information about the fundamental processes that determine longevity.     

Computer-assisted instruction: What it can and cannot do.

Reviewed current research in computer-assisted instruction to determine which of the 7 paradigms were valid uses of the computer in the instructional process. The 7 modes were drill and practice, tutorial, dialogue, simulation and gaming, retrieval and reorganization of information, problem solving with computational and display tools, and artistic design and composition. Criterion statements are presented to judge the relative merits of each paradigm. Application of these criteria resulted in the tutorial mode, the simulation and gaming mode, the information retrieval and reorganization mode, and the problem solving mode being accepted as valid uses of the computer. Nonvalid uses were the drill and practice mode, the dialogue mode, and as an artist's aid. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Combined mode I-mode III fracture toughness of a spherodized 1090 steel

The aim of this investigation was to determine the fracture behavior of a spherodized 1090 steel under combined mode I-mode III loading conditions. Suitably defined formulations of the J integral denoted J_ic and J_iiic were used to characterize the elastic-plastic fracture of this steel. As the mode III component in the system is increased, the resolved mode I J integral at initiation decreases, its mode III counterpart increases and the total J value remains nearly a constant. This implies a constant energy requirement for fracture initiation under mixed mode loading. As the crack plane becomes less inclined to the load line, the slopes of the mode I and total J resistance curves increase from their pure mode I values until a crack inclination angle of about 65° is reached. Somewhere in the region of 65-55°, a maximum in these values is reached and they fall off rapidly for larger mode III components. This drop is accompanied by the breakup of the crack front into mode I and mode III steps, which is shown to be an energetically more favorable process for this steel.     

交通方式划分的非集计模型——以蚌埠为例

为研究影响城市交通结构的主要因素,建立出行者属性与个体出行方式选择的合理关系模型.所有的出行者相关属性数据均由统计资料获得,方式选择数据由蚌埠市居民出行调查的数据获得.应用非集计模型来建立个人属性、家庭属性和出行属性与方式选择间的函数关系.建模结果表明:居民出行交通方式选择与个人属性、家庭属性和出行属性之间有较稳定的关系,其随着时间的推移变化甚微.非集计模型所推算的交通方式结构较为精确,可用于交通方式结构的预测.此外,所建模型亦能识别方式分担的主要影响因素,从而实现交通方式结构优化.     

大型工程项目平行承包模式下业主方信息管理

平行承包模式是大型工程建设项目中业主普遍采用的组织形式。本文通过分析这种模式下业主信息 管理面临的困难和不足,提出了工程建设业主的信息管理模式,明确了这种模式应该能达到的功能,最后指出了这 种信息管理模式应该注意的几个问题。     

Voltage dependencies of the fast and slow gating modes of RIIA sodium channels

Rat brain IIA sodium channel alpha-subunits were expressed in Xenopus oocytes, and the sodium currents were measured by intracellular voltage clamping with large agarose-tipped electrodes and by excised membrane patch-clamp recording to separate and characterize the properties of the fast and slow channel gating modes. The currents showed biexponential inactivation properties with fast and slow phases that could be isolated as distinct gating modes through differences in their inactivation properties. At holding potentials more negative than -55 mV, fast mode currents inactivated within a few milliseconds of depolarization, and could be distinguished by their rapid recovery from inactivation. Single sodium channels in the fast mode opened early after depolarization and rarely showed re-openings. At holding potentials positive to -55 mV, fast mode currents were inactivated, revealing slow mode currents which had slower activation and inactivation kinetics and showed sustained single channel activity during depolarizing pulses. The steady-state voltage dependencies of fast and slow mode activation were very similar. In contrast, slow mode inactivation occurred at potentials 27 mV more positive than fast mode inactivation. The slow mode appears to be due to destabilization of a voltage-insensitive conformation of the channel. The fast gating process dominated at high current levels, perhaps due to alpha-subunit interactions.     

副枪自动化控制系统

济钢第三炼钢厂副枪自动化控制系统采用SDM模型实现自动化炼钢。该系统由L1级电气控制系统和L2级SDM工艺控制模型组成,L1级电气控制系统负责采集冶炼过程中钢水的温度和成分并直接传送到L2级上,SDM工艺控制模型根据接收到的数据,计算补吹模型,实行动态炼钢。     

首秦公司冷矫直机工艺优化及应用

为解决原有矫直模式单独依靠钢板厚度来判断的问题,在现有各缺陷矫直模型的基础上,根据实际生产特点进一步对厚度和变辊原则进行优化。结合屈服强度对厚度进行细化,将矫直模式的判断量（钢板期望塑性变形率）由原设计的3降为2,优化冷矫直机九/五矫直模式,改变了以前固定的矫直模式,实现了矫直模式的动态调整。使矫直模式根据钢板强度和厚度的变化来确定,缺陷钢板经过矫直后板形良好,完全满足标准要求。