粉末近净成形技术研究现状

概述了粉末注射成形技术和粉末挤压成形技术的工艺及特点.探讨了粉末注射成形技术和粉末挤压成形技术关键工艺的研究现状,总结了粉末注射成形技术和粉末挤压成形技术的应用现状及目前的研究热点,提出了今后的发展趋势和研究方向.     

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。     

首钢绿色低碳炼铁技术的发展与展望

 进入新世纪以来,首钢进行了搬迁调整和结构优化。按照新一代可循环绿色低碳钢铁制造工程理念,在河北唐山地区相继建成了首钢股份和首钢京唐两个现代化钢铁制造基地。阐述了首钢炼铁技术绿色低碳发展理念,提出了发展途径和目标,总结了近年来首钢炼铁技术进步和创新实绩。重点论述了烧结料面喷吹蒸汽技术、复合球团制备技术、高比率球团矿高炉冶炼技术以及冶金烟气综合治理与深度净化技术的研究和应用效果。面向未来,结合首钢炼铁技术的发展现状以及绿色低碳发展目标,对首钢炼铁技术的发展趋势进行了探讨和展望。     

中国薄板坯连铸连轧技术的发展

 对中国近30年来薄板坯连铸连轧技术的发展进行了综述,分析了中国薄板坯连铸连轧技术发展的几个阶段及其特征,介绍了薄板坯连铸连轧技术领域的主要技术成就,包括：物理冶金过程和组织演变规律、纳米粒子的发现、薄规格产品生产技术、微合金化技术、中高碳钢生产技术和硅钢生产技术等,探讨了中国薄板坯连铸连轧技术未来的发展方向。     

现代镀锌及连退炉快冷技术的发展和现状

主要介绍了现代镀锌及连退炉的快冷技术的发展和现状,并分别对辊冷技术、气体喷射冷却技术、水冷技术和戊烷超干冷技术的工作原理、技术特点进行了阐述,对比分析了各种冷却技术的优缺点,为镀锌及连退生产线冷却方式的选择提供理论指导.     

关于PM材料制品技术的发展及其工业化的意见

本文叙述了新的ＰＭ技术如超细粉制造技术、快速凝固制粉技术、机械合金化技术、液相烧结技术、快速固结技术等。通过简要叙述,结合上海科研和生产的需要,提出了粉末冶金技术发展和工业化的一些建议。     

工业以太网在自动化领域中的发展应用

主要介绍了以太网技术和现场总线技术的特点,论述了现场总线技术应用以太网技术的优势,介绍了工业以太网协议及产品在自动化领域中的发展状况和趋势。     

熔融还原技术的发展及在我国推广应用的前景

从资源和环境的角度分析了研究开发熔融还原技术的必要性。讨论了熔融还原的原理和主要技术难点。对世界上几种主要熔融还原技术的发展现状进行了详细介绍,并分析了我国推广应用熔融还原技术的可能性和前景。     

中国钢研科技集团公司钢铁研究总院结构材料研究所五十年历程系列报道——科研领域(一)

高性能碳结钢：在DINF理论和晶粒细化技术的研究基础上,形成了高强度低成本碳结钢技术基础,开发了三级和四级热轧碳结钢钢筋技术、400MPa级热轧钢板（带）技术。在国际上首先形成了碳结钢的高强度化理论和技术。     

钢铁制造企业网络虚拟化技术及应用

计算机网络虚拟化技术主要分为网络系统的虚拟化分区技术和网络设备的虚拟化机框技术。近年来,计算机网络虚拟化技术在钢铁制造企业的信息化系统中的大量应用,增强了应用系统的扩展性,简化了网络层次,降低了管理成本,最终为企业降低成本并使企业更加环保。本文介绍了常用和最新的网络虚拟化技术,并就其在钢铁企业生产主干网和数据中心的应用案例做了技术分析。最后得出结论,不同的环境下使用不同的虚拟化网络技术,以充分发挥各技术的优点。     

多参数融合的球磨机振动特征提取方法

针对单信号特征参数不能准确表征球磨机负荷状态的问题,采用时域统计分析方法和AR模型方法提取球磨机振动的时域特征参数和频域特征参数,并利用D-S证据理论用于融合振动信号的时域和频域特征参数,并计算每个特征参数的基本概率分布函数.将基本概率分布函数值作为球磨机负载状态的特征值,建立多振动特征参数的特征向量模型.结果表明,多振动特征参数的特征向量模型能很好地表征球磨机负荷状态,为球磨机负荷预测提供数据支持.      

Study on Outboard Inductive Damping Valve in Hydro-pneumatic Suspension

A new outboard inductive damping valve without any electronic control system is developed. Its working princi-ple, structure and external characteristic are studied. Its mathematical model is presented and its damping characteristic is investigated on the basis of fluid continuity equation, differential equations of motion and Bernoulli equation. The influence of the valve parameters on the damping characteristic is studied numerically. The effects of outboard inductive damping valve and common damping valve on ride and tire load are compared also. The external characteristic of the valve is verified in bench test. The results show that the valve' s mathematical model is quite accurate and the developed valve can be adjust in two stages, which can also meet the requirements of the dynamic characteristic of the vehicle suspension system.     

TQFR-3000 型同步牵引发电机的外特性曲线分析

TQFR-3000型同步牵引发电机在考虑电压电流的限制条件下,为了充分利用柴油机的功率,同步牵引发电机外特性曲线和功率曲线应该保持在理想状态。而同步牵引发电机所拥有的自然外特性曲线,无法使柴油机保持恒定功率。通过对TQFR-3000型同步牵引发电机的外特性曲线进行分析并调节,使同步牵引发电机的外特性曲线和功率曲线达到理想状态。     

Executive functioning as outcome in patients after traumatic brain injury

The shape of rate-intensity functions recorded from individual neurons of the auditory nerve using stimulus frequencies at and below the characteristic frequency have been both well-characterized and modeled by other researchers. However, previous studies of rate-intensity functions using stimulus frequencies above the characteristic frequency have primarily focused on the slopes of the rising phases of the functions. Hence, they did not determine whether rate-intensity functions recorded using stimulus frequencies above the characteristic frequency saturate, and, if so, at what firing rates the saturation occurs. In this study, rate-intensity functions have been obtained from neurons of the eighth nerve of the chinchilla in response to gated, sinusoidal stimuli in order to investigate saturation firing rates for frequencies above the characteristic frequency. For each neuron, rate-intensity functions were obtained for stimulus intensities up to 90 dB SPL at the characteristic frequency and at as many frequencies above the characteristic frequency as time would allow. These data clearly reveal that, for frequencies above the characteristic frequency, saturation occurs at a rate that decreases monotonically as the frequency of stimulation is increased. In addition, an empirical equation is given which summarizes the dependence of saturation on stimulus frequency for the data of this study.     

Separator Material Chosen for MH/Ni Battery

The properties of MH/Ni batteries using different separator were studied.And then an idea for choosing separator for high-power MH/Ni battery was provided.Using the separator with grafting treatment, the storage characteristic, charge retention characteristic and anti-soft-short characteristic of high-power MH/Ni battery are improved.Wetlaid and spunfibre material meet different properties requirement of battery.     

基于特征模型和模糊动态特征模型自适应控制方法的网络控制系统

针对网络控制系统模型参数选取困难的问题,利用特征模型和动态特征模型的自适应控制方法在实际工程中建模简单、控制精度较高的特点,以直流电机的网络控制系统为例,研究了具有时延和数据丢包网络情况下的网络控制系统,提出了基于特征模型的自适应控制方法和基于模糊动态特征模型的自适应控制方法.仿真结果表明:丢包率对特征模型控制器系统的影响较大,而网络延时对模糊动态特征模型控制器系统影响较大.所提两种方法均可有效保证网络控制系统的控制性能.      

考虑膨胀岩流变特性的巷道支护探讨

对膨胀岩巷道进行支护设计时,应考虑其流变特性.本文用伯格模型描述膨胀岩的流变特性.并以喷锚支护为例,探讨了根据蠕变曲线确定巷道的支护时间和支护刚度,提出了针对膨胀岩特点的巷道支护思想.     

Nondestructive Assessment of Reinforced Concrete Structures Based on Fractal Damage Characteristic Factors

Nondestructive damage assessment of civil engineering structures has become a focus of increasing interest for recent decades. Its core is to extract effective damage characteristic information capable of reflecting structural damage status. In this study, fractal theory is adopted to extract the fractal damage characteristic factors of a reinforced concrete structure by characterizing its surface-crack distributions. The concentrated and even load spaces are generalized as applicable spaces for employing fractal-to-structural damage assessment. As demonstrated in the damage assessment of reinforced concrete beams under four-point bending and aged crossbeams of an operation bridge in a sluice, the surface-crack distributions of reinforced concrete structures exhibit monofractal character in the concentrated load space, and multifractal character in the even load space. The physical damage interpretations of the extracted monofractal and multifractal damage characteristic factors in the respective load spaces are then established by analyzing the correlations between the monofractal dimension and the natural frequency, and between the multifractal singular spectrum and the average carbonized depth and residual material intensity, respectively. The closely linear fitting relationships between the fractal quantities and traditional damage characteristic factors indicate that the fractal (i.e., monofractal and multifractal) quantities can serve as viable and novel damage characteristic factors in the online damage assessment of concrete structures. It is significant that the proposed fractal damage characteristic factors overcome some disadvantages of traditional damage characteristic factors in practical applications, and they extend the technique of fractal into the meaningful damage assessment of reinforced concrete materials.     

WJD-0.75型铲运机静液传动系统特性分析

详细介绍静液传动系统的基本工作原理和特点，并对静液传动系统特点进行分析。     

基于机尾红外热图像的烧结矿质量监测

在成功研制烧结机尾红外线成像系统的基础上,研究出烧结机尾特征图像的捕捉技术,通过对特征图像处理与分割、温度场的红外热分析以及反映烧结工况的特征变量提取,建立了烧结质量的在线质量监测模型。为烧结过程的监控、调整和控制搭建了理想的平台,取得较好的效果。