Complexity and criticality in fusion, space and astrophysical plasmas

Techniques from complexity and criticality theory have fruitful applications to a wide range of natural and laboratory plasma systems. Here we review examples that have direct observational relevance, spanning fusion, the Earth's magnetosphere, the sun and astrophysical accretion disks. The complex systems techniques range from sandpiles to a novel loop-based dynamical model, together with modern approaches to model-independent data analysis.     

A composite-neighborhood tabu search approach to the traveling tournament problem

The Traveling Tournament Problem (TTP) is a combinatorial problem that combines features from the traveling salesman problem and the tournament scheduling problem. We propose a family of tabu search solvers for the solution of TTP that make use of complex combination of many neighborhood structures. The different neighborhoods have been thoroughly analyzed and experimentally compared. We evaluate the solvers on three sets of publicly available benchmarks and we show a comparison of their outcomes with previous results presented in the literature. The results show that our algorithm is competitive with those in the literature.     

Composite-variable modeling for service parts logistics

The Publisher regrets that it appears there is only one author for this article. There are actually two authors. The co-author is named above. This was a typesetter error. The online version of the original article can be found at     

Synthesis of Fe-based amorphous composite coatings with low purity materials by laser cladding

Amorphous composite coatings Fe₃₈Ni_30−XSi₁₆B₁₄V₂M_X (X = 0, 1, 2) (M contains Al, Ti, Mo, and C) were prepared with low purity of raw materials by laser cladding. X-ray diffraction and transmission electron microscopy results show that the coating have an amorphous structure with a few crystalline phase on it. The amorphous phase is the primary phase. The glass forming ability as well as the microhardness of the Fe-based alloy made from low purity raw materials can be much enhanced by adding small amount of multi-components. However, the elements addition has its optimal quantity. When X is equal to 1, the microstructure of the coating contains 97.93% amorphous phase and 2.07% crystalline phase on it. As a result, the microhardness of the coating reaches maximum. With further increasing of the additions, the amorphous phase in the coating lessens instead of augment and the crystalline phase begins to accumulate, which result in the decrease of the microhardness.     

发粉红色荧光的含铽络合物光谱表征

本文报道合成了可发出粉红色荧光的含铽络合物２－萘甲酸－邻菲罗啉－铽，并对其进行了荧光光谱及红外光谱研究，结果表明，由于２－萘甲酸，邻菲罗啉配体的混配作用，使铽离子的＾５Ｄ４－＾７Ｆ３跃迁产生较强的６１５ｎｍ发射峰，其发射强度大于由＾５Ｄ４－＾７Ｆ５跃迁产生的５４５ｎｍ发射峰，因而络合行发出粉红色荧光。     

基于多带复数小波与最大后验概率估计法的图像去噪方法

提出一种基于多带复数小波与最大后验概率估计方法的图像去噪方法，与二带小波以及相应的去噪方法相比，性能具有明显改善。     

Spaces of functions of mixed smoothness and approximation from hyperbolic crosses

We compare function spaces of dominating mixed smoothness and spaces of best approximation with respect to hyperbolic crosses.     

Study of complex huygens' principle

Complex Huygens' principle provides an exact base for the simulation of wave propagation through a complex medium by complex ray. In this article, presented is the general formula of complex Huygens' principle, i. e. the complex point source representation of three-dimensional wave propagation, and the analytic formula of the strength of complex point source is derived here for the special case that wave sources are enclosed in a sphere.     

Integration and dimensional modeling approaches for complex data warehousing

With the broad development of the World Wide Web, various kinds of heterogeneous data (including multimedia data) are now available to decision support tasks. A data warehousing approach is often adopted to prepare data for relevant analysis. Data integration and dimensional modeling indeed allow the creation of appropriate analysis contexts. However, the existing data warehousing tools are well-suited to classical, numerical data. They cannot handle complex data. In our approach, we adapt the three main phases of the data warehousing process to complex data. In this paper, we particularly focus on two main steps in complex data warehousing. The first step is data integration. We define a generic UML model that helps representing a wide range of complex data, including their possible semantic properties. Complex data are then stored in XML documents generated by a piece of software we designed. The second important phase we address is the preparation of data for dimensional modeling. We propose an approach that exploits data mining techniques to assist users in building relevant dimensional models.     

Optimization of the number and the positions of error sensors in adaptive active sound control

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