基于最小二乘法的电力系统状态估计算法研究

针对现行电力系统状态估计算法中存在的各种发展潮流，重点剖析了被广泛应用的基于最小二乘法的状态估计的基本原理和改进后的几种状态估计方法，阐明了各算法的应用优势和存在的不足。对于存在不良信息系统进一步提高算法的精度和估算速度的发展方向提出了新的思想。     

开闭裂纹转子的模型化与动态仿真

基于所建立的开闭裂纹转子系统的非线性动力学模型，对裂纹转子在不同激励参数下的开闭条件进行了预测，并对转子运行轨道和频谱响应进行了动态仿真．结果表明，对裂纹开闭条件的预测是正确的，同时转子出现裂纹时显示出特殊的动力学特性     

Group consensus for multiple networked Euler-Lagrange systems with parametric uncertainties

In this paper,a group consensus problem is investigated for multiple networked agents with parametric uncertainties where all the agents are governed by the Euler-Lagrange system with uncertain parameters.In the group consensus problem,the agents asymptotically reach several different states rather than one consistent state.A novel group consensus protocol and a time-varying estimator of the uncertain parameters are proposed for each agent in order to solve the couple-group consensus problem.It is shown that the group consensus is reachable even when the system contains the uncertain parameters.Furthermore,the multi-group consensus is discussed as an extension of the couple-group consensus,and then the group consensus with switching topology is considered.Simulation results are finally provided to validate the effectiveness of the theoretical analysis.     

DS-TE环境下LSP抢占算法

原有V-PREPT(Versatile Preemption)算法关心的是抢占总代价最小化, 灵活性较好但带宽利用率不高。为此, 在研究DS-TE环境下的抢占机制及现行的抢占算法基础上, 提出了BH-PREPT(Bandwidth Preemption)算法。该算法能在最小化抢占总代价的条件下提高带宽的利用率, 在保证被抢占的总带宽满足需求带宽的前提下, 通过采取枚举法找出抢占总代价最小的LSP(Label Switching Path)组合, 且优先选择被抢占LSP数目最少的组合实施抢占。通过Matlab的仿真结果表明, BH-PREPT算法在提高带宽利用率方面比V PREPT算法更具有优势。     

中西式快餐的技术创新比较

随着改革开放的不断深入,国际间经济合作的不断加强,快餐业渐渐兴起并得以发展壮大,随之出现了中式快餐业。快餐业的产生是餐饮业进行的一次重大的技术创新。分别以麦当劳和马兰拉面作为西式快餐业和中式快餐业的代表,从技术创新的角度出发,分别从产品创新、过程创新、组织创新和市场创新4个方面进行比较,为中式快餐的技术创新和标准化、连锁化经营提供借鉴。     

光突发交换网络结构与路由技术研究

光突发交换是面向下一代因特网的光交换模式,是光电路交换(OCS)和光分组交换(OPS)的有效折衷方案,避免了各自的缺点。在OBS中,使用的带宽粒度介于光电路交换和光分组交换之间,比光电路交换灵活,比光分组交换易于实现,是很有发展前途的光交换技术。路由技术在光突发交换中起重要作用,在很大程度上影响着光突发交换网络的性能。给出了路由机理和路由计算的流程。     

基于谱域球谐展开的多层快速多极子算法

介绍了基于谱域球谐函数展开的多层快速多极子算法,通过处理三维金属体的散射问题,验证了算法参数选取的经验公式,并对算法性能做出了理论分析,得出该算法具有内存占用少﹑迭代速度快的优点,数值结果显示了该方法的高效性.     

Novel laminated multiferroic heterostructures for reconfigurable microwave devices

Voltage tuning of magnetism is fundamentally and technically important for fast, compact and ultra-low power electronic devices. Multiferroic heterostructures,simultaneously exhibiting distinct ferroelectric and ferromagnetic properties, have caught a lot of attentions because of the capability of controlling magnetism by a voltage via a strain-mediated magnetoelectric（ME） coupling. In these materials, a voltage-induced strain is involved to create an effective magnetic field and change ferromagnetic resonance frequency in the coupled ferromagnetic phases through magnetoelastic interactions. Therefore, the devices made of such materials are compact, ultra-fast and energy efficient,providing new functionalities for microwave components.This paper will review the recent progress of multiferroics and their applications in microwave devices from different aspects, including the creation of the novel laminated multiferroic heterostructures with a strong ME coupling, the realization of the multiferroics based on tunable microwave signal processors and the investigation of nonvolatile tuning of microwave properties using ferroelastic domain switching in multiferroic heterostructures. These tunable multiferroic heterostructures and devices offer great opportunities for realizing the next generation of tunable magnetic microwave components, ultra-low power electronics and spintronics.     

季节性商品的二级供应链转运模型研究

以季节性商品供应链为背景,考虑由一个生产商和二个销售商组成的二级供应链结构,研究了由生产商的定价决策和销售商的订货决策构成的动态博弈框架,分析了(1)转运(不考虑顾客转移)与(2)无转运(顾客部分转移)两种情形下供应链各成员的博弈策略.数值模拟表明:转运策略的引入,使生产商的最优期望利润和销售商的最优订货水平得到了提高;从整体上看,转运策略增加了总体供应链的最优期望利润.