Backstepping approach to the adaptive regulator design for a one-dimensional wave equation with general input harmonic disturbance

This paper considers the parameter estimation and stabilization of an unstable one-dimensional wave equation with matched general harmonic disturbance at the controlled end. The backstepping method for infinite-dimensional system is adopted in the design of the adaptive regulator. It is shown that the resulting closed-loop system is asymptotically stable. Meanwhile, the estimated parameter is shown to be convergent to the unknown parameter as time goes to infinity.     

Upper bounds of differential characteristic probability for unbalanced Feistel network employing DSM

In this paper, for the unbalanced Feistel network which employs diffusion matrices in a switching way, we study the fixed number of its differential active S-boxes. Firstly we obtain some lower bounds of the differential active S-boxes for m, 2m and 3m rounds of Feistel structure, respectively. By concatenating these rounds, a fixed number of differential active S-boxes for arbitrary round number is derived. Our results imply that the unbalanced Feistel network using DSM is more secure than the traditional structure.     

Nonextensivity and the <Emphasis Type="Italic">q</Emphasis>-distribution of a relativistic gas under an external electromagnetic field

We investigate the nonextensivity and the q-distribution of a relativistic gas under an external electromagnetic field. We derive an expression for the nonextensive parameter q based on the relativistic generalized Boltzmann equation, the relativistic q-H theorem and the relativistic version of the q-power-law distribution function in the nonextensive q-kinetic theory. We thus provide the connection between the parameter q≠1 and the spatial-temporal derivatives of the temperature field of the gas as well as the four-potential, and thereby present a clearly physical meaning for the nonextensivity for the relativistic gas.     

Latent Co-interests' Relationship Prediction

With the development of the social media and Internet, discovering latent information from massive information is becoming particularly relevant to improving user experience. Research efforts based on preferences and relationships between users have attracted more and more attention. Predictive problems, such as inferring friend relationship and co-author relationship between users have been explored. However, many such methods are based on analyzing either node features or the network structures separately, few have tried to tackle both of them at the same time. In this paper, in order to discover latent co-interests’ relationship, we not only consider users’ attributes but network information as well. In addition, we propose an Interest-based Factor Graph Model (I-FGM) to incorporate these factors. Experiments on two data sets (bookmarking and music network) demonstrate that this predictive method can achieve better results than the other three methods (ANN, NB, and SVM).     

暂准进境货物内销缓税利息计征与否之决定因素探究

暂准进境货物进境后的状态有加工、储存和使用三种,在不同状态下的暂准进境货物有的内销需征收缓税利息,有的则不征收.通过对各类暂准进境货物的异同、状态变化和对税收优惠政策的利用情况进行分析,结果表明:暂准进境货物内销缓税利息计征与否的关键因素是公平原则的要求,即缓税利息制度存在与执行的意义所在.     

12CaO·7Al2O3型精炼合成渣物性与脱硫试验

对近两年从国外发展起来的新型精炼合成渣 12 Ca O· 7Al2 O3的烧成工艺、物性和脱硫能力进行了试验研究。结果表明 ,该渣系原料来源广泛 ,成本较低 ;以 12 Ca O· 7Al2 O3为低熔点相 ,具有较低的熔化温度 ,在精炼温度下具有较好的流动性 ;由于具有很高的碱度和 Al2 O3含量 ,因而具有较强的脱硫能力和吸附铝脱氧产物的能力 ,并且在精炼过程中还可配加大量石灰 ,进一步提高其脱硫能力 ,尤其适用于铝脱氧钢     

结合自然辩证法浅谈篮球运动的发展

本文通过自然辩证法原理,采用举例分析的研究方法,分析篮球运动发展的内外因素及规律,描述篮球运动的发展历程,证明事物都是不断发展的、相互联系的自然辩证法观点,揭示事物的发展是曲折向前的马克思主义哲学规律。在运动实践和科学研究中做出新的正确判断,采取新的方法和手段不断推动篮球运动向更高更新层次方向发展。     

Optimal multi-asset investment with no-shorting constraint under mean-variance criterion for an insurer

This paper considers the optimal investment strategy for an insurer under the criterion of mean-variance. The risk process is a compound Poisson process and the insurer can invest in a risk-free asset and multiple risky assets. This paper obtains the optimal investment policy using the stochastic linear quadratic (LQ) control theory with no-shorting constraint. Then the efficient strategy (optimal investment strategy) and efficient frontier are derived explicitly by a verification theorem with the viscosity solution of Hamilton-Jacobi-Bellman (HJB) equation.     

结合自然辩证法浅谈篮球运动的发展

本文通过自然辩证法原理,采用举例分析的研究方法,分析篮球运动发展的内外因素及规律,描述篮球运动的发展历程,证明事物都是不断发展的、相互联系的自然辩证法观点,揭示事物的发展是曲折向前的马克思主义哲学规律.在运动实践和科学研究中做出新的正确判断,采取新的方法和手段不断推动篮球运动向更高更新层次方向发展.