MUSIC算法在高速并行处理机上的实现

利用FPGA的特点,提出了一种实现MUSIC算法的新的高速并行硬件解决方案。给出了对MUSIC算法进行预处理的结果,为硬件实现加速提供可能;导出了MUSIC算法适合于FPGA实现的并行分解方法;介绍了用FPGA来实现谱峰搜索的新方法。结果表明,该设计方法处理速度理想,能够满足实时性要求。     

基于网络搜索指数的股票市场微观结构特征

基于2013-2016年2 966只股票的交易数据及对应的网络搜索指数对股票市场微观结构特征进行研究。通过建立横截面回归模型以及面板联立回归等模型分别探究了网络搜索指数对中国股票市场的收益率、流动性以及波动率的影响。实证结果表明:股票的关注度增加,会提高股票市场交易的流动性和收益率;对于关注度对波动率的影响没有得出统一的结论,在股票市场短周期上,关注度增加并不显著影响股票市场的波动率,但是在长周期上,会降低股票的波动率。     

搜索引擎之竞价排名的法律问题研究

搜索引擎以其全球性、实时性等特点在当今时代发展极为迅速,而竞价排名成为该类网站获得高额利润的首选方式。首先界定了竞价排名的性质以及运营模式,对因竞价排名而对网络用户、商家以及搜索引擎本身产生的影响进行阐述;其次对采取竞价排名的搜索引擎进行了法律责任认定;同时提出了在没有相应的法律对其规制的前提下,运用现有法律及法律基本原则保护合法权益、加强行业规制、建立健全法律制度等建议,以期待搜索引擎的健康发展。     

Dynamic scheduling of steel casting and milling using multi-agents

This paper presents a case study on the use of multi-agents for integrated dynamic scheduling of steel milling and casting. Steel production is an extremely complex problem requiring the consideration of several different constraints and objectives of a range of processes in a dynamic environment. Most research in steel production scheduling considers static scheduling of processes in isolation. In contrast to earlier approaches, the multi-agent architecture proposed consists of a set of heterogeneous agents which integrate and optimize a range of scheduling objectives related to different processes of steel production, and can adapt to changes in the environment while still achieving overall system goals. Each agent embodies its own scheduling model and realizes its local predictive-reactive schedule taking into account local objectives, real-time information and information received from other agents. Agents cooperate in order to find a globally good schedule, which is able to effectively react to real-time disruptions, and to optimize the original production goals whilst minimising disruption carried by unexpected events occurring in real-time. The inter-agent cooperation is based on the Contract Net Protocol with commitment.     

Design-balanced capacitated multicommodity network design with heterogeneous assets

Management of assets plays an essential role in determination of service plans operated by carriers in the transportation and logistics system. In this paper, we introduce certain issues related to management of heterogeneous assets in the well-known design-balanced capacitated multicommodity network design, where design-balanced requirements are explicitly defined based on heterogeneous assets.Taking vehicles as an example of heterogeneous assets, we first present an arc-based formulation for the proposed problem and discuss two associated subproblems. We then propose a tabu search based metaheuristic for this problem. Over a wide range of network design instances, we respectively compare our approach with CPLEX with one-hour and ten-hour time limits. Computational results demonstrate that the proposed approach performs very well in terms of solution quality and computing time, especially for large instances.     

中国古典戏曲中“后花园”意象探微——以《牡丹亭》、《西厢记》、《墙头马上》为例

"后花园"作为一个常见意象出现在中国古典戏曲中,其义涵已非纯粹意义上的地理空间所能涵盖。作为传统秩序的逸出,"后花园"是多重双向对生因素交织而成的"临界空间",是闺阁女性超越现实秩序加诸其身之种种限制的凭依。但性别差异下的男性写作却更多消解了"后花园"之于闺阁女性的自由想象,而演化为一种"猎奇"心理的满足、"常态"生活的补偿与对作为潜在威胁的女性力量的规驯。     

Moderators of Career Calling and Job-Search Behaviors Among Unemployed Individuals

We examined the relationship between calling, job-search clarity, and job-search intensity in a cross-sectional study of Italian unemployed job seekers (N = 315). Structural equation modeling with observed variables and latent moderated structural equation models were adopted to test whether optimism, self-esteem, and perseverance moderate the relation between calling, job-search clarity, and job-search intensity. Perceiving a calling was positively related with job-search clarity and intensity, and these relations were stronger in individuals with lower levels of optimism, self-esteem, and perseverance. This study suggests that perceiving a calling is an important personal resource that is related to a clearer job-search goal and to more intense job-search activities and can support job seekers in personal adverse conditions. These results suggest integrating job-search behaviors in the work-as-calling theory and that incorporating the construct of calling into career counselors' practices may increase the efficacy of job-search activities.     

万维网的小世界效应探讨

在工程信息的长期安全保存和可靠调用过程中，存在着信息和其使用系统之间的兼容问题和对信息定期检查、移存、转化的时间和效率问题。目前国内外对这两类问题还没有可行的解决方法和技术。介绍了“六度分离”现象和经典的小世界网络模型，提出了WWW模型的架构，并在此基础上提出了万维网中任意两个网页间链接路径的搜索算法和计算万维网的特征路径长度，借此验证万维网具有小世界效应，为解决大量级和分散性信息的管理问题提供了可靠的科学依据。     

论网络环境下文献信息检索教学

网络环境下,搞好高校文献信息检索教育,具有重要意义.针对文献信息检索教学的现状,应从制定新的教学大纲及教学目标、搞好教材建设、加强计算机检索教学建设和提高教师业务能力方面入手,以解决文献检索教学上存在的问题.     

The VL control measure for symmetric networks

In this paper we measure “control” of nodes in a network by solving an associated optimisation problem. We motivate this so-called VL control measure by giving an interpretation in terms of allocating resources optimally to the nodes in order to maximise some search probability. We determine the VL control measure for various classes of networks. Furthermore, we provide two game theoretic interpretations of this measure. First it turns out that the VL control measure is a particular proper Shapley value of the associated cooperative network game. Secondly, we relate the measure to optimal strategies in an associated matrix search game.