Dynamical economic dispatch using distributed barrier function-based optimization algorithm

In this paper, we study the distributed economic dispatch problem where the supply demand balance, capacity constraints and ramp-rate constraints are considered. In order to accommodate varying power load and power storage in reality, we introduce two variables where each variable is time-varing and has its own dynamics. The renewable power is also considered. Barrier functions are introduced to deal with the local constraints by means of imposing penalty terms into the objective function to ensure that the optimal solution satisfies the corresponding constraints. Based on the Langrange dual theory, the primal optimization problem is transformed into the dual problem, which is solved by the primary-dual algorithm proposed in this paper. Under the assumption that the communication graph is an undirected and connected graph, we analyze the convergence of the proposed algorithm. The simulations on IEEE six-bus test systems are carried out to verify the performance of the algorithm, which shows that the proposed algorithm converges to the optimal solution, while all the constraints are met.     

虎丘塔加固工程的监控和观测技术

虎丘塔是中国现存年代最久且倾斜度最大的楼阁式砖塔。 1981年至 1986年 ,中国工程界对这座濒临险境的古塔进行了全面加固修缮 ,基本控制了塔基沉降 ,稳定了塔身倾斜 ,为保护人类文化遗产提供了有益的借鉴。结构的变形和砌体的裂缝状况是砖塔可靠性的重要表征 ,也是加固修缮工程中施工监测的重要依据 ,本文在收集、整理虎丘塔加固原始施工文件和观测资料的基础上 ,对裂缝和变形的监控观测技术进行了归纳、分析和介绍。     

Fractional differential approach to detecting textural features of digital image and its fractional differential filter implementation

This paper mainly discusses fractional differential approach to detecting textural features of digital image and its fractional differential filter. Firstly, both the geo- metric meaning and the kinetic physical meaning of fractional differential are clearly explained in view of information theory and kinetics, respectively. Secondly, it puts forward and discusses the definitions and theories of fractional stationary point, fractional equilibrium coefficient, fractional stable coefficient, and fractional grayscale co-occurrence matrix. At the same time, it particularly discusses frac- tional grayscale co-occurrence matrix approach to detecting textural features of digital image. Thirdly, it discusses in detail the structures and parameters of nxn any order fractional differential mask on negative x-coordinate, positive x-coordi- nate, negative y-coordinate, positive y-coordinate, left downward diagonal, left upward diagonal, right downward diagonal, and right upward diagonal, respectively. Furthermore, it discusses the numerical implementation algorithms of fractional differential mask for digital image. Lastly, based on the above-mentioned discus- sion, it puts forward and discusses the theory and implementation of fractional differential filter for digital image. Experiments show that the fractional differential-based image operator has excellent feedback for enhancing the textural details of rich-grained digital images.     

眼睑整形术60例分析

目的比较和探讨眼睑整形的手术方法。方法手术方法去除多余的眼睑皮肤、眶脂肪、睫毛内翻。结果术后效果稳固持久,外观美丽,自然、富有立体感。结论手术治疗是眼睑美容整形的有效方法。     

酚醛树脂固化动力学研究及其耐热性能评价

利用差示扫描量热(DSC)法分析了甲醛、苯酚物质的量之比为1.9:1、1.7:1、1.5:1、1.3:1时酚醛树脂(PF)的固化性能,采用Kissinger法计算了4批PF固化反应的表观活化能。用热失重分析(TG)法对4批PF的耐热性能进行了考察。试验结果表明,甲醛、苯酚物质的量之比为1.7:1时,PF的固化反应活化能最低,即固化时需要较少的热量,易固化,其耐热性能最好。     

A distributed normalized Nash equilibrium seeking algorithm for power allocation among micro-grids

In this paper, a power allocation problem based on the Cournot game and generalized Nash game is proposed. After integrating dynamic average consensus algorithm and distributed projection neural network through singular perturbation systems, a normalized Nash equilibrium seeking algorithm is presented to solve the proposed power allocation problem in a distributed way.Combine Lyapunov stability with the singular perturbation analysis, the convergence of the proposed algorithm is analyzed. A simulation on IEEE 118-bus confirms that the proposed distributed algorithm can adjust the power allocation according to different situations, while keeping the optimal solution within the feasible set.     

国产双锥形光纤实现4kW单模激光输出

基于自主研制的双锥形掺镱双包层光纤,开展了全光纤高功率光纤激光放大实验。激光系统实现了中心波长为1080 nm、最高功率为4 kW的单模激光输出,其光光效率和斜率效率分别为82%和83%,质量因子(M²)为1.33,拉曼抑制比为44 dB。实验结果表明,双锥形光纤具有同时提高非线性效应和模式不稳定性效应阈值的优势,有利于进一步提升高光束质量光纤激光器的输出功率。     

Q3接口适配技术的研究

针对传统的电信网络设计未能提供Ｑ３接口,从而不能直接对其实现遵循ＴＭＮ标准的网络管理,提出采用Ｑ３接口适配技术作为这一问题的解决方案。对Ｑ３接口适配技术的基本原理进行详细的阐述,并在此基础上,通过对具体实验结果的分析,提出了Ｑ３接口适配技术在具体实现中所采用的一种优化的体系结构,最后对这种体系结构中的内部接口的最终实现从开放分布处理的观点进行详细的分析,为具体的电信设备提供满足ＴＭＮ标准的网络管理