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We compared power spreading of a partially captured orbital-angular-momentum (OAM) beam by using single and double apertures. Double apertures could help reducing crosstalk from OAMl to OAMl+m by ∼10 dB, where l is an integer and m is an odd number.
Aimed at the amount of aggregation graphs produced by the dimension which the user is interesting on the multidimensional moving object network. By introducing the idea of graph index, we put forward of the structure data query algorithm MCPath to solve the problem of querying the interesting structure data on specific dimension. MCPath algorithm decomposes the query structure to the shortest paths,...
In this paper, a single-layer bandpass frequency selective surface (FSS) is proposed for L-band applications. The FSS unit cell consists of an improved hexagonal aperture unit embedded with H-shape slots. Simulated results show that the FSS obtains good frequency selective performance. Its relative bandwidth is about 55.7% using −3 dB as the criteria for the transmission coefficient. Moreover, the...
Capability-Based requirements management and planning thoughts and methods have gone increasingly deep into the development of Weapon System-of-Systems (WSoS). In the traditional top-to-bottom capability requirement planning (CRP) methods, the constraints among different capabilities indexes acquired from the tasks decomposition are neglected, which leads to the irrationalities and conflicts between...
In this paper, we study mean first-passage time (MFPT) for random walks on a network through edge iteration. The feature of this kind of network is that every existing edge gives birth to finite nodes at each step. According to the network structures, we obtain the analytical expression for MFPT, which shows that the MFPT grows as a power-law function with the number of nodes in the large limit of...
Performance Index is the foundational and essential indices of measurement of SoS(System of Systems) capability. We propose ten sorts of mapping relationships description between kernel elements of SoS architecture based on the DSM/DMM model. The formalization of model transformation, combination and transposing operators are described as the foundation of proposition of formulation to measure the...
Online social networks (OSNs) have become the most popular services on the Internet, and such systems have become part of users' life all over the world. They visit such systems every day and spend more and more time on them. So understanding users' behavior is important to understand such systems. This paper presents results from our measurement on the large-scale OSN spanned by Weibo, the most prevalent...
For a specific frequency control system including AGC, there were relative differences in system frequency response due to the power disturbances in different frequency. The sensitive disturbances were defined in this paper by considering the natural characteristics of frequency control system including AGC. Establishing the frequency control system model, then analyzing its transfer function is an...
Based on the analysis method of CFD-Fluent, and designed the different sinks with five widths and three depths, the variation influence on the performance of the runner of energy conversion was explored by the changing size of the sink, and the brief analysis was given based on the theory of finite wing span and infinite wing span, and the results of numerical simulation were compared with the model...
In this paper, thin wire structure with different radius is studied by using method of moments (MoM) based on pulse basis function. An electromagnetic model is presented to analyse thin wire structure with different radius approximately. Numerical results based on the present model have better agreement with HFSS results, which show that this present model is effective for analysing thin wire antenna...
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