系统CAE仿真技术在炼钢设备中的应用

介绍系统CAE仿真特点和一般过程,以大型转炉系统CAE为分析实例,介绍其仿真技术在炼钢设备中的应用.结果表明,系统CAE仿真技术无论对冶金设备的创新设计,还是对在役设备的性能掌握均具有良好的支撑作用.     

论“岁差”

本文提出了我国古代对岁差的认识只停留于表象;着重论述了岁差真运动的概念,并以尧典四仲中星为例说明对岁差的正确运用。     

Chaos and Nonlinear Feedback Control of the Arch Micro-Electro-Mechanical System

This paper addresses a nonlinear feedback control problem for the chaotic arch microelectro- mechanical system with unknown parameters, immeasurable states and partial state-constraint subjected to the distributed electrostatic actuation. To reflect inherent properties and design controller, the phase diagrams, bifurcation diagram and Poincare section are presented to investigate the nonlinear dynamics. The authors employ a symmetric barrier Lyapunov function to prevent violation of constraint when the arch micro-electro-mechanical system faces some limits. An RBF neural network system integrating with an update law is adopted to estimate unknown function with arbitrarily small error. To eliminate chaotic oscillation, a neuro-adaptive backstepping control scheme fused with an extended state tracking differentiator and an observer is constructed to lower requirements on measured states and precise system model. Besides, introducing an extended state tracking differentiator avoids repeated derivative for the virtual control signal associated with conventional backstepping. Finally, simulation results are presented to illustrate feasibility of the proposed scheme.     

模糊综合评判法在城市交叉口综合质量评价中的应用

为了全面评价城市交叉口综合质量,选择了交叉口混合交通运行状态评价指标,并通过指标隶属度函数研究建立了相应的模糊综合评判模型.结合实例对其综合运行质量进行了评价分析和聚类排序,从而为评估城市交通拥堵、制定相应的交通管理和控制策略提供了一种有效的定量分析方法.     

DPA/CBr_4感光材料的辐射响应

本工作研究DPA/CB_(γ4)感光材料对γ射线相电子束的剂量响应特性.实验结果表明,这种自由基片对γ射线和电子束灵敏,具有较宽的剂量响应范围和较好的稳定性.可作为微剂量学研究的一种探测器,并提供了一种高剂量的辐射剂量测量手段.     

On Some Computational Problems in Local Fields

Journal of Systems Science and Complexity - Lattices in Euclidean spaces are important research objects in geometric number theory, and they have important applications in many areas, such as...     

Vectorial holography-mediated growth of plasmonic metasurfaces

Nowadays,the electromagnetic properties of artificial photonic materials can be well-tuned via designs over their composition and geometries.However,engineering...     

Single-cell atlas of domestic pig cerebral cortex and hypothalamus

The brain of the domestic pig(Sus scrofa domesticus)has drawn considerable attention due to its high similarities to that of humans.However,the cellular composi...     

调度控制原理与方法的应用研究

探讨了企业调度系统对生产系统实施直接控制所采用的日产量、日产量累计实际与计划差异两种方法及其结合使用的作用,以及控制参数δ、ω的确定方法;探讨了对经营系统实施间接、指导性控制所采用的存量弹性控制方法及其弹性控制参数q的确定方法。     

Agent系统中的规范和电子制度

本书为《软件代理技术》丛书的一册。书中提出的HARMONIA是一电子机构的新构架，它从规范系统的大部分抽取层到最终的多Agent执行定义为一个多层结构，新构架是一适合于不同层面上有规定限制的高调节复合体。为了探究此问题，需要对电子健康保护和e-政府情况作研究。本书围绕Agent协调制度的规范执行问题进行讨论。为了执行，调节时的标准应在操作表示（例如规则或过程）过程中作一解释，指出规范在电子制度中怎样执行。