基于影响图的Agent建模及其在Robocup中的应用

讨论了用影响图对多Agents环境建模的方法.Robocup是一个典型的多Agents系统,其中的球和球员都可以看作是Agent.以Robocup仿真比赛为例,给出单Agent和多Agents模型,并给出传球问题的决策实现过程.     

基于Socket和多线程技术的并发服务器的研究

在交互式分布仿真(D IS)中,为满足实时性的要求,基于网络的D IS服务器必须具有多任务并发处理的功能.本文将Socket和多线程技术作为研究D IS服务器的理论基础,结合课题的实践论述了其关键技术的应用,在W indows 2000平台上,较好地实现了D IS服务器与数个客户机之间实时数据通信的任务,满足了D IS服务器的性能要求.     

中美大学合作开发云机器人首次实验成功

中国科学技术大学机器人实验室与美国卡内基-梅隆大学机器人实验室联合进行的首次云机器人实验取得成功,并以最高分获得2014Robocup机器人世界杯中国公开赛技术挑战赛冠军。     

带服务器的3台机器流水作业排序启发式算法

研究了带服务器的流水作业排序问题的复杂性和启发式算法.每个工件在机器上加工之前,必须由服务器先进行安装,在任何时刻服务器只能在1台机器上安装工件,目标是使最大加工时间达到最小.在只有3台机器的情况下,利用3-划分到该问题的一个归约来证明该流水作业排序问题仍然是强-困难的.为此,引入一个新的启发式算法,并证明该启发式算法的紧界为2.     

3D打印材料的发展现状

3D打印,又称作增材制造,是快速成型技术的一种,被誉为"第三次工业革命"的核心技术.材料是3D打印的物质基础,也是当前制约3D打印发展的瓶颈.文章综述了3D打印材料的发展现状,重点介绍了用于3D打印的几类主要材料,并指出了当前3D打印材料发展所面临的问题.     

黑龙江省"十一五"工业资金需求预测

为研究黑龙江省"十一五"工业资金需求水平,运用柯布-道格拉斯生产函数,以1990~2003年的工业经济状况为基本数据,包括工业增加值、工业就业人数和工业投资总额,建立预测模型.在对2006~2010年的工业增加值估算、对工业就业人数进行灰色预测基础上,预测2006~2010年工业投资总额.结果表明:预测模型的R2为0.992,F值为657.775,D.W值为1.717,预测模型合理.技术进步对经济增长的贡献率为76.35%.黑龙江省"十一五"工业投资额年均为515.9亿元,远超过2003年的183.2亿元.     

3D遥视系统中视频对象的鼠标点取方法

对3D遥视系统中基于3D鼠标的视频对象点取方法进行了研究.在3D遥视/遥控系统的基本框架中加入了基于3D鼠标的对象操控处理模块,并对包括立体视频对象的视差提取、3D鼠标的叠加显示、对象人工标注、3D对象的鼠标事件处理等关键技术环节在内的核心模块"鼠标操控"的实现原理进行了细致的分析和设计,最后通过实验验证了本方法的正确性.     

Hand gesture tracking algorithm based on visual attention

In the majority of the interaction process, the operator often focuses on the tracked 3D hand gesture model at the "interaction points" in the collision detectionscene, such as "grasp" and "release" and objects in the scene, without paying attention to the tracked 3D hand gesture model in the total procedure. Thus in this paper, a visual attention distribution model of operator in the "grasp", "translation", "release" and other basic operation procedures is first studied and a 3D hand gesture tracking algorithm based on this distribution model is proposed. Utilizing the algorithm, in the period with a low degree of visual attention, a pre-stored 3D hand gesture animation can be used to directly visualise a 3D hand gesture model in the interactive scene; in the time period with a high degree of visual attention, an existing "frame-by-frame tracking" approach can be adopted to obtain a 3D gesture model. The results demonstrate that the proposed method can achieve real-time tracking of 3D hand gestures with an effective improvement on the efficiency, fluency, and availability of 3D hand gesture interaction.     

一种全方位移动机器人的运动分析与控制实现

为达到在动态环境下,对机器人进行实时控制的目的,提出一种全方位移动机器人运动控制器的设计方法.以足球机器人Robocup作为实验平台,全方位移动机器人作为研究对象,通过研究具有四组正交轮组成的移动机构运动机理,在将机器人运动进行分析的基础上,以数字信号处理器(DSP)为核心,引入专家比例-积分-微分(PID)速度控制器,实现了对机器人的控制.实验结果表明,该设计方法有很好的实时性和一定的鲁棒性,在实际比赛中,实现了对全方位移动机器人的快速、实时、准确控制.     

一个二维5-磺酸间苯二甲酸基钐配位聚合物的合成、结构及性能研究

5-磺酸间苯二甲酸单纳(NaH2SIP)和Sm(NO3)·6H2O水热反应制备一个2D钐配位聚合物[Sm(SIP)(H2O)4].在该聚合物的结构中,3个SIP3-交替连接3个Sm(Ⅲ)离子形成一个24元环.相邻24元环以共边的方式形成一个沿bc平面的格子状的2D层状结构.并通过配位水分子与SIP3-的羧基及磺酸基上氧原子形成分子间氢键和π…π堆积作用组建了一个3D超分子框架结构.通过将Sm(Ⅲ)离子和SIP3-配体均虚拟为3-连接结点,该2D层状结构可简化为[6,3]拓扑网络.粉末X-射线衍射表明获取的样品与表征的单晶物相一致.热重分析表明该聚合物的热分解以两步失重的方式发生,其热分解温度为602℃.     

煤矿安全生产的监测与控制的数学模型

研究2006年全国大学生数学建模竞赛D题,在充分了解煤矿背景资料和瓦斯相关知识后,根据国家《煤矿安全规程》的有关规定,结合所给的数据进行了综合的分析,建立了煤矿安全生产的约束非线性优化监测与控制模型,利用matlab求出了模型的最优解。     

Adaptive integration of local region information to detect fine-scale brain activity patterns

With the rapid development of functional magnetic resonance imaging (fMRI) technology, the spatial resolution of fMRI data is continuously growing. This provides us the possibility to detect the fine-scale patterns of brain activities. The established univariate and multivariate methods to analyze fMRI data mostly focus on detecting the activation blobs without considering the distributed fine-scale patterns within the blobs. To improve the sensitivity of the activation detection, in this paper, multivariate statistical method and univariate statistical method are combined to discover the fine-grained activity patterns. For one voxel in the brain, a local homogenous region is constructed. Then, time courses from the local homogenous region are integrated with multivariate statistical method. Univariate statistical method is finally used to construct the interests of statistic for that voxel. The approach has explicitly taken into account the structures of both activity patterns and existing noise of local brain regions. Therefore, it could highlight the fine-scale activity patterns of the local regions. Experiments with simulated and real fMRI data demonstrate that the proposed method dramatically increases the sensitivity of detection of fine-scale brain activity patterns which contain the subtle information about experimental conditions. Supported by Chair Professors of Changjiang Scholars Program and CAS Hundred Talents Program, National Program on Key Basic Research Projects (Grant No. 2006CB705700), National High-Tech R&D Program of China (Grant No.2006AA04Z216), National Key Technology R&D Program (Grant No. 2006BAH02A25), Joint Research Fund for Overseas Chinese Young Scholars (Grant No.30528027), National Natural Science Foundation of China (Grant Nos.30600151, 30500131 and 60532050), and Natural Science Foundation of Beijing (Grant Nos. 4051002 and 4071003)     

骨架密实型水泥稳定碎石基层的配置与施工研究

基于骨架密实型水泥稳定碎石基层抗裂性不足这一现实,公路沥青路面设计规范(JTGD50-2006)中提出了骨架密实型水泥稳定碎石基层级配。结合232省道江阴段改建工程(江阴市芙蓉大道西段含扬子江路LM-A1)半刚性基层骨架密实型水泥稳定碎石配合比设计和施工质量控制。通过室内相关试验以及现场检测结果,初步探究了骨架密实型水泥稳定碎石基层施工质量控制的关键点。     

吉林地区M ≥ 4.0的地震预警模型研究

利用复发间隔公式和地震发生概率模型计算了吉林地区2006—2022年4.0级以上(M≥4.0)地震的相关数据,得到了研究区内4个震级档的平均复发间隔和发生概率,并以此建立了吉林地区M≥4.0地震的4级预警模型.利用吉林地区的地震数据对目前吉林地区4个震级档所处的地震预警级别进行预测显示: M≥ 4.0的地震目前不在预警范围内, M≥4.5和M≥5.5的地震处于C级黄色预警级别, M≥5.0的地震处于D级蓝色预警级别.该研究结果可为吉林地区的地震预警工作提供参考.     

一种新的时空数据折中算法

2006年,Mukhopadhyay和Sarkar提出了一种新的时空数据折中算法,TMTO曲线为T3M7D8=N7,称为MS曲线。文章在MS方法的基础上,通过改变单向函数的使用次序,得到一种新的表结构。利用新的表结构,设计了时空数据折中算法,并得到TMTO曲线DTM2=N2。当D相似文献   

Effect of CuO on the formation mechanism of calcium sulphoaluminate

Calcium sulphoaluminate was prepared with chemical reagents in this paper. The formation mechanism of calcium sulphoaluminate and effect of CuO on the formation mechanism of calcium sulphoaluminate were investigated by the chemical analysis, X-ray diffraction （XRD）, and differential scanning calorimetry （DSC）. The results show that there are three ways in the formation of calcium sulphoaluminate. CuO can promote the decomposition of calcium carbonate and decrease the formation temperature of calcium sulphoaluminate（C4A3S）. When the burning temperature is below 1 000 ℃, the addition of CuO can promote the formation of calcium sulphoaluminate, while CuO can not favor the formation of calcium sulphoaluminate above 1 000 ℃.     

AutoCAD动态块的化工设备标准件参数化图库建立

在AutoCAD软件环境下,运用AutoCAD2006的动态块功能建立化工设备标准件图库,并通过工具选项板对图库进行管理。图库以化工设备标准件的二维图形作为图块基础,并向块中添加参数和动作定义,从而实现了参数化设计。以椭圆形封头为例,介绍了具体创建动态块的方法,提高了绘图的专业化程度,避免了在以往只能通过对AutoCAD进行复杂的编程才能完成的二次开发工作。此方法还可以扩展到建筑、电气、给排水等专业领域,具有较强的实用性和可扩展性。     

高精度三维在潜江凹陷拖谢地区的实践

根据潜江凹陷拖谢地区油气滚动开发的需要,2006年江汉物探公司对该区进行了高精度三维地震资料采集.通过采用宽方位小面元、高覆盖以及优选激发岩性等采集方法,运用复杂地表条件的观测系统变观技术,使该区次二次三维地震采集品质较以往三维地震采集资料有较大的提高,构造剖面的小断块清晰、反射波组连续性强,有利于低幅构造、小断块和岩...     

Research on cohesive sediment erosion by flow: An overview

Erosion of cohesive sediment by flow is a very complicated phenomenon occurring worldwide. Understanding and modeling of the erosion process are important for many issues such as the breaching of embankments, riverbank stability, siltation of harbors and navigation channels, service life of reservoirs, distribution of (heavy metal) pollutants and water quality problems. In the last few decades, numerous studies have been done on the erosion of cohesive sediment by flow. Nevertheless, the factors affecting the erosion resistance of cohesive sediment are still not fully understood and the knowledge of the physics of cohesive sediment erosion is inadequate, as a result the mathematical modeling of this erosion is far from satisfactory. In this paper an overview of the studies on the erosion resistance, erosion threshold and the erosion rate of cohesive sediment by flow is presented. The outcomes achieved so far from the studies and the existing problems have been analyzed and summarized, based on which recommendations are proposed for future research. Supported by the National Key Technology R&D Program of China (Grant Nos. 2006BAC14B02 and 2006BAB05B03) and the National Basic Research Program (973 Program) of China (Grant No. 2007CB714106)