Agent technologies for feature selection

The feature selection problem is considered. A feature selection method is developed on the basis of the multiagent approach with indirect communications between agents. Software is created to implement the multiagent method. The problem of feature selection for diagnosing chronic bronchitis is solved.     

Agent based scientific simulation and modeling

The simulation and modeling of complex physical systems often involves many components because (i) the physical system itself has components of differing natures, (ii) parallel computing strategies require many (somewhat independent) components, and (iii) existing simulation software applies only to simpler geometrical shapes and physical situations. We discuss how agent based networks are applied to such multi‐component applications. The network agents are used to (a) control the execution of existing solvers on sub‐components, (b) mediate between sub‐components, and (c) coordinate the execution of the ensemble. This paper focuses on partial differential equation (PDE) models as an instance of the approach and describes the implementation of networks using the PELLPACK problem solving environment for PDEs and the Bond system for agent based computing. Copyright © 2000 John Wiley & Sons, Ltd.     

一种新型Agent结构模型研究

本文提出了一个基于传统BDI结构的新型Agent模型,即：BDIM模型。通过在传统的BDI结构模型基础上追加激励算子（motivation）试图解决传统的BDI结构在描述自学习机制和知识动态维护方面的局限性。本文在Rao和Georgeff基于扩展计算树逻辑对BDI结构形式化建模的基础上进行了扩展,把激励相关算子无缝地嵌入到一个已经比较完善的形式化体系结构中.     

Two technologies vie for recognition in speech market

Improvements to voice-recognition algorithms and greater computing power have changed speech technology from an approach with limited uses to an increasingly important part of many applications. As this process has unfolded, developers have searched for an open standard, rather than proprietary development and runtime environments, that would let them easily and quickly add speech input/output capabilities to applications that function across platforms, said Inderpal Singh Mumick, founder and CEO of Kirusa, a wireless platform developer. Two principal approaches have resulted from this search: VoiceXML and SALT (speech application language tags).     

3D树木建模技术研究进展

3D树木建模一直都是计算机图形学、计算机视觉、虚拟现实等领域最具有挑战性的研究方向之一,国外学者在该领域做了大量研究工作,但3D树木建模综述性文章的缺乏成为其发展的制约因素。侧重从计算机视觉的角度,将当前国内外经典的3D树木建模方法分为基于图像,基于规则和基于草图等三类,并跟踪了最新的3D树木建模技术进展,对他们的成果进行了深入剖析,重点阐述3D树木建模关键技术。最后,分析和比较了几种主要的3D树木建模技术,提出轻量化3D树木建模技术是今后虚拟场景中的交互应用的发展趋势。此外,根据当前研究的难点提出了基于单张图像的轻量化混合建模的研究思路。     

可计算的复杂桥梁特征建模技术研究*

由于缺乏有效的计算机图形学技术和三维几何建模支持,当前可计算桥梁三维几何建模面临着很大的困境。通过以下四方面的研究,建立了复杂桥梁的可计算三维特征几何模型：a）通过布尔运算,实现了任意桥梁构件基本截面的定义;b）建立了适合桥梁建模特点的曲线拉伸、渐变和构件放样等基本的三维建模方法;c）通过单元划分和节点编号策略,实现了复杂桥梁三维几何模型的构件间约束的定义;d）通过特征依赖树结合桥梁几何模型,建立了桥梁三维特征模型,并在原型系统BridgeDesign中进行了系统实现。本研究表明,根据复杂桥梁建模的专业     

Labor market modeling using a labor supply function of two-arguments

A two-argument function of individual labor supply is considered. Real wage and unemployment rates are the arguments of this function. Conditions of emergence of direct and inverse relations between these two economic indicators are investigated. This function is used to analyze processes in a competitive and monopsonic labor market. The expediency and conditions are substantiated for the use of the exogenous increase in labor remuneration by increasing minimal wage.     

无线传感器网络节点的状态分析及Agent建模

为独立于内部结构和具体实现来理解和分析无线传感器网络节点的自治工作机制,分析了无线传感器网络节点的各种工作状态和自组织特性,建立了一种面向无线传感器网络节点的Agent类元模型。该元模型在Agent BDI模型基础上,扩展AUML Agent类图,引入符合无线传感器网络特性的Mental、Role和Protocol等模型元素来描述无线传感器网络节点的静态结构。实例分析表明,结合节点工作状态,Agent类元模型为无线传感器网络节点体系的研究提供了良好的可视化建模基础和分析工具。     

The Agent Web Model: modeling web hacking for reinforcement learning

Website hacking is a frequent attack type used by malicious actors to obtain confidential information, modify the integrity of web pages or make websites unavailable. The tools used by attackers are becoming more and more automated and sophisticated, and malicious machine learning agents seem to be the next development in this line. In order to provide ethical hackers with similar tools, and to understand the impact and the limitations of artificial agents, we present in this paper a model that formalizes web hacking tasks for reinforcement learning agents. Our model, named Agent Web Model, considers web hacking as a capture-the-flag style challenge, and it defines reinforcement learning problems at seven different levels of abstraction. We discuss the complexity of these problems in terms of actions and states an agent has to deal with, and we show that such a model allows to represent most of the relevant web vulnerabilities. Aware that the driver of advances in reinforcement learning is the availability of standardized challenges, we provide an implementation for the first three abstraction layers, in the hope that the community would consider these challenges in order to develop intelligent web hacking agents.

     

保性的Petri网运算在主体BDI内部结构建模中的应用

针对主体内部结构的建模问题,借助网过程的概念,提出了使用保性的Petri网运算方法来描述主体内部结构的方法,大大降低了多主体系统建模的复杂度;通过研究Petri网库所细化操作的性质保持性问题,将细化操作应用在主体BDI内部结构的建模中,这种建模方法突出了主体的自治性.同时对网系统模型的运行终止性、有界性和无死锁性质进行详细地分析,得到的结果保证了多主体系统开发和实施的正确性.     

Information technologies in the transition to the market economy: The case of latecomers

During the transition to the market economy, Eastern European countries face serious problems in the implementation of information technologies. There are many constraints holding the information thresh-old to a low level. Constructed on centrally-planned principles, Eastern European economies created rather ineffective information industries, despite relatively extensive rates of informatisation. During the current transition, privatisation, new hierarchial structures, and information policies are expected to improve the economic performance of information technology. Some short and long term aspects of the problem are outlined, taking into account the formation of new trends, government measures to stimulate informatisation, and foreign aid intended to bring Eastern Europe to world levels of information technology.     

刚柔耦合系统建模与仿真关键技术研究

研究了基于虚拟样机技术的复杂刚柔耦合多体系统建模与仿真中的关键技术,提出了保证仿真精度、缩短仿真时间,提高仿真速度的具体措施,大大提高了基于Pro/E、ANSYS和ADAMS三款软件联合进行刚柔耦合多体系统可靠性研究的操作性;解决了含硫化铁矿结核体薄煤层采煤机截割部的输入实现、约束及边界条件等关键技术,为基于复杂煤层赋存条件下薄煤层采煤机截割部工作的可靠性研究提供了理论准备;找到了采煤机截割部关键零件设计上存在的问题,为采煤机截割部系统的优化提供了有力的量化依据;尤其是复杂刚-柔耦合多体系统建模与仿真中关键技术的解决对于研究多体系统工作的可靠性、降低研发成本、物理样机一次成功目标的实现具有重要的理论意义和较强的实用价值。     

A fuzzy physiological approach for continuously modeling emotion during interaction with play technologies

The popularity of computer games has exploded in recent years, yet methods of evaluating user emotional state during play experiences lag far behind. There are few methods of assessing emotional state, and even fewer methods of quantifying emotion during play. This paper presents a novel method for continuously modeling emotion using physiological data. A fuzzy logic model transformed four physiological signals into arousal and valence. A second fuzzy logic model transformed arousal and valence into five emotional states relevant to computer game play: boredom, challenge, excitement, frustration, and fun. Modeled emotions compared favorably with a manual approach, and the means were also evaluated with subjective self-reports, exhibiting the same trends as reported emotions for fun, boredom, and excitement. This approach provides a method for quantifying emotional states continuously during a play experience.     

Multilevel modeling using spatial processes: Application to the Singapore housing market

Customary spatial modeling with point-referenced data introduces a modeling specification that includes a mean term, a spatial error or random effects term and a pure error term. The spatial random effects are usually modeled through a mean zero spatial process. If the mean term includes an intercept, then the spatial random effects can be interpreted as local spatial adjustments to the intercept. If the mean term is a familiar linear regression then it makes sense to ask whether the regression coefficients are constant or whether they might vary spatially, analogous to the intercept. This has been previously considered and the benefits of the increased flexibility have been demonstrated. The situation with replicates available at spatial locations is considered. This enables the building of the spatial analog of a multilevel model—replicate level covariates to explain the replicate level responses and location level covariates to explain the location level coefficients. The particular motivation for this modeling effort is a data set on condominium sales in Singapore. In this case, the replicates are the sales of condominiums within a building. Unit level features are available to explain the selling price of the unit and building level attributes to explain the coefficients. Anticipating dependence between coefficients, a multivariate spatial process specification is provided. This process is specified through kernel convolutions due to the computational challenges associated with fitting such models to a fairly large data set. There is flexibility in this kernel modeling necessitating model comparison. In particular, roughly 68,000 transactions across 1374 buildings (locations) are analyzed and the results and interpretation for the selected model are presented.     

基于agent的连续双向拍卖人工股市建模研究

我国股票市场是连续双向拍卖的订单驱动市场,而在连续双向拍卖人工股市的仿真研究中,目前发现的仿真模型均是在Swarm中实现的[1],用Java实现的仿真模型尚未发现。对仿真得到的数据进行了分析,仿真数据表明,真实股票市场中的一些典型特征都可在本文模型的仿真过程出现。     

数字孪生峡江水利枢纽工程多尺度建模及可视化渲染关键技术应用

为探索实现物理流域及水利工程的数字化映射,提出多尺度建模和可视化渲染技术方案,并深入探讨无人机倾斜摄影、BIM、三维激光扫描等多尺度建模技术,以及实时渲染引擎、多细节层次处理、仿真渲染优化等可视化渲染技术。以数字孪生峡江水利枢纽工程应用为例,采用 GIS 与 BIM 的可视化方法,对模型数据进行层次划分,实现可视化渲染,构建峡江水利枢纽工程宏观、局部、微观等 3 个层面的可视化模型,实现工程多时态、全要素地理空间数字化映射,有效支撑上层智慧化业务应用建设,为多尺度建模和可视化渲染在水利行业的应用提供参考。     

Structural modeling of oligopoly market under the nonlinear functions of demand and agents’ costs

In this paper, we consider the structural modeling problem of an oligopoly market for an arbitrary number of agents, the linear and nonlinear models of market demand, and the nonlinear models of agents’ costs. The equilibrium behavior of the agents is described on the basis of conjectural variations in the Cournot or Stackelberg reaction models (in the cases of one or several leaders). The adequacy of the Cournot reaction model is demonstrated using the equilibrium modeling of the Volga region telecommunication market, where the price functions and agents’ cost functions for the voice and Internet services are defined by statistical analysis methods.     

Special issue on modeling and control technologies for civil,energy, and power systems

Energy and power systems technology is a fundamental field in the civil engineering.Innovation in power generation,grid intelligence,renewable resources,propulsion and powertrains for transportation devices,etc.is a long-term challenging theme for science and technology.Especially,improving the efficiency and the emission in energy con-     

A modeling approach to financial time series based on market microstructure model with jumps

A continuous-time generalized market microstructure (GMMS) model and its discretized model are proposed for characterizing a class of financial time series. The GMMS model is a kind of jump-diffusion model that may describe the dynamic behaviors of measurable market price, immeasurable market excess demand and market liquidity, as well as the interaction among the three variates in a market. The model includes a jump component that is used to capture the large abnormal variations of financial assets, which may occur when a market is affected by some special events happened suddenly, such as release of important financial information. On the basis of the discrete-time GMMS model, an online recursive jump detection algorithm is proposed, which is developed in accordance with the Markov property of financial time series and the Bayes theorem. Simulations and case studies demonstrate the feasibility and effectiveness of the model and its estimation approach presented in this paper.     

宽带接入的几种用户认证技术

如何提供符合用户需求的业务并提供良好的服务是电信运营商必须考虑的问题。宽带网络中认证技术的采用要遵循网络的可运营、可管理要求。本对宽带接入系统中如何有效地进行用户管理，以及宽带接入的三种用户认证技术和特点进行了讨论。