摘要：A combination of hydrogels and microfluidics allows the construction of biomimetic three-dimensional(3D)tissue models in vitro,which are also known as *** hydrogel patterningwith awell-controlled spatial distribution is typically achieved by embedding sophisticated microstructures to act as a ***,these physical barriers inevitably expose cells/tissues to a less physiologically relevant microenvironment than in vivo ***,we present a novel dissolvable temporary barrier(DTB)strategy that allows robust and flexible hydrogel patterning with great freedom of design and desirable flow stimuli for cellular *** key aspect of this approach is the patterning of a water-soluble rigid barrier as a guiding path for the hydrogel using stencil printing technology,followed by a barrier-free medium perfusion after the dissolution of the *** and multiple tissue compartments with different geometries can be established using either straight or curved DTB *** effectiveness of this strategy is further validated by generating a 3D vascular network through vasculogenesis and angiogenesis using a vascularized microtumor *** a new proof-of-concept in vasculature-on-a-chip,DTB enables seamless contact between the hydrogel and the culture medium in closed microdevices,which is an improved protocol for the fabrication ofmultiorgan ***,we expect it to serve as a promising paradigm for organ-on-a-chip devices for the development of tumor vascularization and drug evaluation in the future preclinical studies.

摘要：A novel optimal design of sub-wavelength metal rectangular gratings for the polarizing beam splitter （PBS） is proposed. The method is based on effective medium theory and the method of designing single layer antireflection coating. The polarization performance of PBS is discussed by rigorous couple-wave analysis （RCWA） method at a wavelength of 1550 nm. The result shows that sub-wavelength metal rectangular grating is characterized by a high reflectivity, like metal films for TE polarization, and high transmissivity, like dielectric films for TM polarization. The optimal design accords well with the results simulated by RCWA method.

摘要：A novel technique for the optimal tuning of power system stabilizer (PSS) was proposed,by integrating the modified particle swarm optimization (MPSO) with the chaos (MPSOC).Firstly,a modification in the particle swarm optimization (PSO) was made by introducing passive congregation (PC).It helps each swarm member in receiving a multitude of information from other members and thus decreases the possibility of a failed attempt at detection or a meaningless ***,the MPSO and chaos were hybridized (MPSOC) to improve the global searching capability and prevent the premature convergence due to local *** robustness of the proposed PSS tuning technique was verified on a multi-machine power system under different operating *** performance of the proposed MPSOC was compared to the MPSO,PSO and GA through eigenvalue analysis,nonlinear time-domain simulation and statistical *** analysis shows acceptable damping of the low-frequency modes and time domain simulations also show that the oscillations of synchronous machines can be rapidly damped for power systems with the proposed *** results show that the presented algorithm has a faster convergence rate with higher degree of accuracy than the GA,PSO and MPSO.

摘要：A simple integrated coupler is proposed for the efficient excitation of surface plasmon polariton （SPP） mode in a thin metal film. The SPP mode is generated in a single Ag-dielectric interface by the incident field and coupled with an Ag thin film. The coupling efficiency at different wavelengths using two different dielectrics, gallium lanthanum sulfide （GLS） and aluminum gallium arsenide （AIGaAs） is calculated by analyzing the SPP propagation dynamics with the finite difference time domain method. A maximum coupling efficiency of 70~ is obtained at a wavelength of 46Ohm when GLS is used, whereas the corresponding value obtained for A1GaAs is 60~o at 56Onto. The proposed structure can be used to excite SPPs in a nano-thin film from an external bulky source and is easier to fabricate since a single interface metal-dielectric configuration is used to excite the metal-thin film.

摘要：自上世纪60年代作为现代估计开山之作的卡尔曼滤波器(Kalman filter)的诞生,时间序列状态空间模型应用于各类动态估计问题吸引了大量的研究关注。特别是,寻求实现闭环马尔科夫-贝叶斯递归(比如,从一个高斯先验到一个高斯后验,本文称之为高斯共轭)的解析解成为一般时间序列滤波器设计的主流思路。其面临的主要挑战包括:系统的非线性、多模态(包括机动模型)、复杂不确定性(比如未知的系统输入,非高斯噪声等)和系统约束(包括循环随机变量)等。这些挑战不断触生新的理论、算法与滤波技术,以实现所期望的参数共轭递归。本文对最新研究进行分类、系统回顾,强调了一些容易被忽略的要点。着重介绍了高精观测非线性系统、高斯后验和机动多模态、以及复杂未知系统输入与约束,以弥补当前文献介绍的不足。同时,本文提出一些新的思考:一是一阶马尔科夫转移模型的替代模型,二是有关计算复杂度的滤波器评价。

摘要：A novel mapping equivalent approach is proposed in this paper, which can be used for analyzing and realizing a memristor-based dynamical circuit equivalently by a nonlinear dynamical circuit with the same topologies and circuit parameters. A memristor-based chaotic circuit and the corresponding Chua＇s chaotic circuit with two output differentiators are taken as examples to illustrate this approach. Equivalent dynamical analysis and realization of the memristor-based chaotic circuit are performed by using Chua＇s chaotic circuit. The results indicate that the outputs of memristor-based chaotic circuit and the corresponding outputs of Chua＇s chaotic circuit have identical dynamics. The proposed approach verified by numerical simulations and experimental observations is useful in designing and analyzing memristor-based dynamical circuits.

摘要：A newly developed heuristic global optimization algorithm,called gravitational search algorithm(GSA),was introduced and applied for simultaneously coordinated designing of power system stabilizer(PSS) and thyristor controlled series capacitor(TCSC) as a damping controller in the multi-machine power *** coordinated design problem of PSS and TCSC controllers over a wide range of loading conditions is formulated as a multi-objective optimization problem which is the aggregation of two objectives related to damping ratio and damping *** minimizing the objective function with oscillation,the characteristics between areas are contained and hence the interactions among the PSS and TCSC controller under transient conditions are *** evaluation of effectiveness and robustness of proposed controllers,the performance was tested on a weakly connected power system subjected to different disturbances,loading conditions and system parameter *** eigenvalues analysis and nonlinear simulation results demonstrate the high performance of proposed controllers which is able to provide efficient damping of low frequency oscillations.

摘要：Similarity measure construction has been proposed as fault detection of flight test method in order to obtain the primary control surface stuck and the combination stuck of primary *** measures were obtained through analyzing the certainty and uncertainty of fuzzy membership functions,which were designed based on well-known Hamming *** was applied to the fault detection of primary control surface stuck of uninhabited aerial vehicle(UAV).At post-failure control surface,if the UAV is controllable and trimmable using other control surfaces,the UAV is able to fly or return to the safety region through reconfiguration of flight control *** detect the fault,similarity measure computations were carried *** result could be applicable with the real-time parameter estimation *** monitoring the value of coefficients due to the control surface deviation,it becomes aware that the control surface fault occurs or *** control surface stuck position and value were separated by comparing the trim value with the reference *** is the advantage of increasing in reliability without adding sensors or with additional low cost.

摘要：Similarity measure design on non-overlapped data was carried out and compared with the case of overlapped *** feature of similarity on overlapped data to non-overlapped data was provided by *** the artificial data illustration,it was proved that the conventional similarity measure was not proper to calculate the similarity measure of the non-overlapped *** overcome the unbalance problem,similarity measure on non-overlapped data was obtained by considering neighbor ***,different approaches to design similarity measure were proposed and proved by consideration of neighbor *** the example of artificial data,similarity measure calculation was carried *** measure extension to intuitionistic fuzzy sets(IFSs)containing uncertainty named hesitance was also followed.

摘要：在未来的高频系统芯片,特别是片上网络的设计中,知识产权模块之间的联系至为关键,而单壁纳米碳管则是其中一种很有前景的纳米结构。电路及系统尺寸的不断缩减限制了对1000 GH级别高频信号特征的利用。本文针对不同结构构型的单壁纳米碳管,对高质量互联中四项重要的四项电参数——阻抗,传播常量,电流密度以及信号延时进行了推导。每个参数均表现出了对其设计互联频率范围和构型的强相关性。与现有理论和实验结果相比,本文所提出的模型在解决下一代高速集成电路互联问题上有其新颖性。