基于Linux的文件系统对连续媒体的支持

从操作系统角度考虑了底层文件系统对连续媒体的支持,并详细介绍了Linux下设计和实现的BLOB(Binary Large Obiject)文件系统的设计思想及其实现技术细节,并讨论它对连续媒体的支持情况。     

DNA计算求解连续空间优化问题

首先构造了二进制编码的网络空间,其两个节点连接权的四条边对应到DNA编码,设计了相应的算子起到DNA计算酶的作用,该算法设计使得DNA计算能够求解连续空间优化问题。通过测试函数表明该算法具有较好的收敛速度和稳定性,求解结果非常好。     

全连续式冷轧工艺特征分析

全连续式冷轧工艺的发展对冷轧带钢的生产带来了重大的变革。然而能形成全连续轧制的条件也是有一定限度的,本文即是结合我国引进的宝钢2030mm轧机从入口段带钢运行条件导出带长与速度的关系式,从主电机功率的利用率分析了全连轧与常规轧制的差异。     

Fuzzy Gain Scheduled Continuous Stirred Tank Reactor with Particle Swarm Optimization based PID control Minimizing Integral Square Error

In this paper, a new control scheme, the gain scheduled Particle Swarm Optimization (PSO) based PID, is proposed for a continuous stirred tank reactor (CSTR). CSTR is a highly nonlinear process that exhibits stability in certain regions and instability in some regions. Generally, PID controllers are used in these processes. Tuning of the PID controller is required to guarantee the best performance of the CSTR. The proposed scheme implements the characteristics of the PSO's global optimization to tune the PID's control parameters: k_p, k_i, k_d, to obtain the best control effect by minimizing Integral Square Error online. The PID controller parameters tuned for each region using PSO are gain scheduled using fuzzy control. Fuzzy gain-scheduling is a special form of fuzzy control that uses linguistic rules and fuzzy reasoning to determine the controller parameter transition policy for the dynamic plant subject to large changes in its operating state. Simulation results show the feasibility of using the proposed controller for the control of the dynamic nonlinear CSTR.     

A damage-based constitutive model for rock under impacting load

Using the Splitting Hopkinson Pressure Bar (SHPB) experimental system, investigations were made into the dynamic mechanical performances of underground soft rocks. The experiments proved that the measured stress–strain curves display the characteristics of plastic deformation. By making use of a revised overstress constitutive formula for the stress model and by taking into account that the strain rate and strain are a function of 1 − E(t)/E₀, a revised overstress constitutive formula for the stress model was simplified by applying dimensional analysis and consequently, a simplified overstress formula was obtained for the stress model. Then, by taking into consideration the effects of damage under a dynamic load on the dynamic loading strength of the rock, the continuous damage theory and the statistical strength theory were introduced into the development of the simplified overstress constitutive formula for the stress model. Hence, a damage-based constitutive formula for an overstress model, which can be appropriately applied to the analysis of full dynamic stress–strain curves, was developed. By using the simplified damage-based constitutive formula for an overstress model, the actually measured curves are fitted, indicating that the fitting curves and those actually measured are in good agreement.     

热卷箱弯曲辊控制浅析

热连轧机中热卷箱的弯曲辊是卷取热钢卷的关键部件,弯曲辊的控制包括卷取速度控制及辊缝位置控制,位置控制又需要辊缝的位置同步控制和速度同步控制。介绍了热卷箱弯曲辊的速度控制和位置控制的方法,并在山东莱芜钢厂经过实际应用检验,取得了良好的控制效果。     

唐钢1810mm生产线质量控制系统分析

简要介绍了唐钢1810mm薄板坯连铸连轧生产线的工艺流程和产品大纲,对生产过程中质量控制系统进行了说明和分析。     

INMO结晶器液压振动控制系统

介绍了攀钢2#板坯连铸结晶器振动控制系统,对系统的组成、功能、调节原理及运行作了简要阐述。振动设备采用达涅利公司开发的结晶器液压振动系统(INMO系统),具有振动质量小,振幅、频率和振动波形可调整的特点,从而改善了铸坯表面与结晶器铜壁的润滑效果,减少振痕深度,提高铸坯表面质量,并减少粘结漏钢。     

电工圆铝杆连铸连轧机组在我公司的发展应用

介绍我公司四条电工圆铝杆生产线设备组成及工艺技术情况,以及所采取的技术改进措施。     

蚁群算法求解连续空间优化问题

借鉴蚁群算法的进化思想，提出一种求解连续空问优化问题的蚁群算法。该算法主要包括全局搜索、局部搜索和信息素强度更新规则。在全舄搜索过程中，利用信息素强度和启发式函数确定蚂蚁移动方向。在局部搜索过程中，嵌入了确定性搜索，以改善寻优性能，加快收敛速率。通过一个实例问题的求解表明了该算法的有效性。