Robust H_∞ Stabilization of Uncertain Linear Time-Delay System with Delayed/Undelayed State Feedback Controllers

1. INTRoDUCTIONThe dynamic behavior of many physical processes consists of inherent time--delays and uncertainties (due tomode1ing errors3 measu-rement errors9 1inearization approkimations, and so on), which can be modeled by anuncertain 1inear system with state/contro1 delay [1ro5l. Since the presence of time-delay is frequelltly a cause ofinstability, stability testing and robust stabilization of uncertain time--delay systems have gained considerableatteniion around the world. In this di…     

On the H_∞ Control for Linear Time-Delay Systems

1.INTRODUCTIONTheH∞controllerdesignmethodhasreceivedmuchattentioninthelastdecade,andmanyPapersonfindingtheH∞controllerfornondelayedlinearsystems(includingthecase:withsomenorm-boundeduncertainty)hasbeenpublished[5-11].However,onlyafewpapersonthedelayedlinearsystemsanduncertaindelayedlinearsystemsexist[l~4].Ontheotherhand,thetime-delayisfrequentlyacauseofinstability,thusthestabilizationandHadcontrolsynthesisoftime-delaylinearsystemsareneededinpractice.Inthispaper,firstlyswegivetwoRiccat…     

Graph-based inductive reasoning

This article discusses methods of inductive inferences that are methods of visualizations designed in such a way that the “eye” can be employed as a reliable tool for judgment. The term “eye” is used as a stand-in for visual cognition and perceptual processing. In this paper “meaningfulness” has a particular meaning, namely accuracy, which is closeness to truth. Accuracy consists of precision and unbiasedness. Precision is dealt with by statistical methods, but for unbiasedness one needs expert judgment. The common view at the beginning of the twentieth century was to make the most efficient use of this kind of judgment by representing the data in shapes and forms in such a way that the “eye” can function as a reliable judge to reduce bias. The need for judgment of the “eye” is even more necessary when the background conditions of the observations are heterogeneous. Statistical procedures require a certain minimal level of homogeneity, but the “eye” does not. The “eye” is an adequate tool for assessing topological similarities when, due to heterogeneity of the data, metric assessment is not possible. In fact, graphical assessments precedes measurement, or to put it more forcefully, the graphic method is a necessary prerequisite for measurement.     

Interpretation neutrality in the classical domain of quantum theory

I show explicitly how concerns about wave function collapse and ontology can be decoupled from the bulk of technical analysis necessary to recover localized, approximately Newtonian trajectories from quantum theory. In doing so, I demonstrate that the account of classical behavior provided by decoherence theory can be straightforwardly tailored to give accounts of classical behavior on multiple interpretations of quantum theory, including the Everett, de Broglie–Bohm and GRW interpretations. I further show that this interpretation-neutral, decoherence-based account conforms to a general view of inter-theoretic reduction in physics that I have elaborated elsewhere, which differs from the oversimplified picture that treats reduction as a matter of simply taking limits. This interpretation-neutral account rests on a general three-pronged strategy for reduction between quantum and classical theories that combines decoherence, an appropriate form of Ehrenfest׳s Theorem, and a decoherence-compatible mechanism for collapse. It also incorporates a novel argument as to why branch-relative trajectories should be approximately Newtonian, which is based on a little-discussed extension of Ehrenfest׳s Theorem to open systems, rather than on the more commonly cited but less germane closed-systems version. In the Conclusion, I briefly suggest how the strategy for quantum-classical reduction described here might be extended to reduction between other classical and quantum theories, including classical and quantum field theory and classical and quantum gravity.     

工程成本不确定性分析及度量方法研究

分析了建筑及安装工程成本的构成，研究了工程成本的不确定性以及不确定性类别：随机性、模糊性、灰色性和未确知性，最后，针对这4类不确定性分别给出了确定其不确定性的数学工具。     

基于贝尔态的确定性量子密钥分配协议

提出了一种基于贝尔态的确定性量子密钥分配协议.它建立在纠缠量子系统的内部关联的基础上,双方通过共享纠缠量子系统和做单粒子量子测量建立起共享的密钥.与传统的只能生成随机字符串作为密钥的量子密钥分配协议不同,利用该协议,双方可以以任意指定的字符串作为共享的密钥.量子力学的定律保证了该协议的无条件安全性.除了单粒子量子测量之外,不需要做任何复杂的量子操作,因此它更容易实现,健壮性更好.     

微机测控装置闭锁的利与弊

本文针对近年来最新推出的测控装置防误闭锁的优势以及发现的问题进行探讨,并提出一些改进意见。旨在为该方式能更完善的推广应用提供参考。     

具有时变时滞不确定系统的稳定时滞界

研究一类线性不确定系统时滞相关稳定的充分条件，并给出了系统的衰减率估计方法，文中给出的释例表明结论优于现有相关研究成果。     

基于RTK技术的大比例尺地形图测绘——以新疆师范大学温泉校区为例

文章通过载波相位差分技术(RTK)完成了新疆师范大学温泉校区的大比例尺地形图外业测量工作,利用GIS软件绘制成图,并制作了温泉校区空间三维模型。利用数字高程模型(Digital Elevation Model,DEM)测算了温泉校区的土方平衡,此项工作为温泉校园的规划和建设提供了可靠的基础地理信息数据。     

浅议计量管理在医院日常工作中的重要性

现代科学技术发展日新月异，高科技仪器广泛应用于医疗诊治领域，如何保证医用计量器具的计量单位统一和量值的准确可靠，保障医用计量仪器设备的正常运转，确保医疗诊断、治疗和医学研究的正确性、准确性。本文从医院计量管理方面阐述，计量检定是医院医疗的技术保证．计量管理在医院日常工作中的重要性。