ERP电子沙盘模拟系统及其在教学中的应用

ERP电子沙盘模拟系统可以有效的帮助学生进行企业经营管理方面的教学。本文介绍了ERP沙盘培训在国内外的应用情况,分析了企业经营管理电子沙盘模拟系统在现代学校教学方面的应用需求,以及在设计时需要面临的一些问题等内容。     

三维军事战场态势标绘技术研究

本文介绍计算机三维战场态势标绘所涉及到的主要研究命题,讨论其技术原理,提出工程设计实现方法。本文论述可供相关的应用研究和计算机编程参考。     

基于仿真模拟技术的电子沙盘在武警部队的应用浅析

随着科学技术的快速发展,沙盘的技术含量也在日渐提升,基于此,本文就基于仿真模拟技术的电子沙盘优势展开分析,并围绕地形分析、信息查询、3D建模、标图、分析量算五部分就电子沙盘的具体应用进行了深入论述,希望由此能够为我国武警部队战斗力的提升带来一定启发.     

基于OSG的军用电子沙盘系统的设计与实现

设计实现基于开源跨平台三维渲染引擎OSG的“军用电子沙盘”系统,对其中场景结构的组织和管理、大地形建模等关键技术进行研究。所开发出的系统具有大规模地形展示、军事单元运动轨迹分析、军事目标多分辨率显示控制等特点,对于战场虚拟仿真系统研发有一定的指导意义。     

利用遥感观测信息制作电子沙盘方法的研究

本文介绍了电子沙盘的制作原理及方法,并在利用三维显示技术的基础上选择遥感观测信息做为地表贴面,从而增强了电子沙盘的真实感。     

基于OSG的军用电子沙盘系统的设计与实现

设计实现基于开源跨平台三维渲染引擎OSG的“军用电子沙盘”系统,对其中场景结构的组织和管理、大地形建模等关键技术进行研究。所开发出的系统具有大规模地形展示、军事单元运动轨迹分析、军事目标多分辨率显示控制等特点,对于战场虚拟仿真系统研发有一定的指导意义。     

ERP电子沙盘实训课程体系的探讨

深圳大学管理学院自2005年增设了ERP实物沙盘模拟实训课程,目前已建成了较为全面的沙盘模拟实训室,形成了一套较成熟的实训课程教学体系。但是,随着学生对于实训课程需求的不断增加,师资、教具及实训空间等教学条件发展滞后,开始制约着ERP沙盘实训的开出与推广。为此,本课程组考虑采用电子沙盘对学生进行ERP实训,并结合《ERP理论与实践》实训课程,制定一套更加成熟的课程体系,以此解决目前存在的各种问题。     

战场态势图快速显示技术研究

根据战场态势图对实时显示的要求,提出采用图形卡硬件加速技术以及灵活的树形数据组织结构方法,减少数据检索时间,大大提高图形处理的速度,优化图形处理性能,从而解决指挥系统中战场态势图对大数据量的矢量地图、大量快速的多目标数据进行实时显示的难题。     

嵌入式智能沙盘上位机的实现与研究

沙盘在当今社会尤其是战争方面仍然扮演举足轻重的角色。虚拟电子沙盘与实物沙盘的结合更能反应出真实的地形地貌,给人以大局与细节的统筹。本文采用模拟简单山地地形,深入浅出地详细阐述智能沙盘系统的几大主要模块技术:地形三维数据的处理技术,PC机上的可视化技术,嵌入式控制技术,等。     

基于全分布式处理的统一态势生成技术研究

战场信息共享作为联合作战指挥的必要前提,发挥着极其重要的作用。简要介绍了统一态势的军事需求,分析了传统处理方法的不足,提出了统一态势实现的关键技术,即全分布式信息融合、统一态势标绘和统一情报分发数据链,并结合工程经验,分析了工程应用中的具体问题和解决方法。通过一个指控系统设计,介绍了全分布式统一态势生成技术的实际应用。     

Emotional effect of cinematic VR compared with traditional 2D film

Virtual reality (VR) has been increasingly applied in filmmaking in recent years. The integration of film and VR is becoming an important breakthrough for traditional films. This new types of film, named cinematic virtual reality (CVR), provides immersive VR experience where individual users can immerse themselves in synthetic world experience in 360° (Mateer, 2017).However, the characteristics and influence of this new digital media on human emotion is far from clear. In this study, we conducted an experiment to investigate the different emotional effects of CVR by comparing with a traditional two-dimensional (2D) film from two critical aspects: subjective emotional experience and real-time objective physiological reaction. Our results first revealed that the subjective experience and the physiological reaction showed significantly stronger emotional effect in the CVR condition than in the 2D condition. Upon further observation, we found that four emotions (excitement, nervousness, hostility, and jitteriness) are more closely correlated with the CVR than with the traditional 2D film. Real-time analysis of skin temperature shows a faster and steadier decline in the CVR group than in the 2D group. Finally, we summarized the causality of the effect by analyzing the characteristics of CVR. Our study suggests that CVR is an effective medium that induces stronger emotional experience and physiological reaction than traditional 2D film can. The design of the VR environment in CVR, as a key feature in the narrative of a film story, has an important influence on the emotional processing of the audience.     

基于三维重建的虚拟现实类鸟飞行系统

随着虚拟现实(virtual reality, VR)技术的飞速发展,各种应用层出不穷。然而目前大多应用仅限于定点的静态全景展示及游览,无法利用VR化不可能为可能的优越性。本文提出了一种融合VR技术与三维重建算法的类鸟飞行交互模拟系统。该系统搭建了结构稳定的硬件控制平台用以改变实际姿态,同时通过软件仿真了虚拟环境中鸟类的飞行,结合硬件驱动及软件模拟实现了深层次的飞行模拟。现有的虚拟环境大多通过人工建模、激光扫描仪或无人机(unmanned aerial vehicle, UAV)航拍构造,其中建模存在费时费力的缺点,激光扫描仪则无法适应大规模重建,而UAV成本高昂且需专业培训。本文引入了基于图像分簇的PMVS (patch based multi-view stereopesis)算法,只需输入特定场景的图片即可利用计算机自动恢复出三维结构,不仅快速而且可对任意场景重构。使用户在足不出户的情况下即可在世界各地体验飞行,为旅游事业及VR产业提供了一种新的可能。     

基于VRML和GIS底层数据融合研究框架

针对现阶段VR和GIS结合的发展情况,分析了其中存在的关键问题,提出了基于VRML和GIS底层数据融合的研究框架。     

电子战武器装备的发展趋势与发展重点

介绍了现有电子战武器装备的类型,探讨了电子战武器装备的现状及其发展趋势,并指出了未来电子战武器装备的发展重点,对于了解电子战武器装备的现状及发展趋势等有一定的意义。     

Si~(4+)掺杂对BaZr(BO_3)_2:Eu荧光粉能量传递的影响

采用高温固相法合成了Si4+掺杂的BaZr(BO3)2:Eu红色发光荧光粉。激发光谱表明,不同Si4+掺杂浓度明显使电荷迁移态(CTS)向高能量的位置移动,且改善了样品的发光强度。分析认为,这是由于Si4+的电负性大于所取代的Zr4+,且Si4+的进入影响了Eu3+的配位数,提高了CTS向发光中心的能量传递几率。依据Judd-Ofelt理论计算的强度参数表明,随着Si4+掺杂浓度的增加,Eu3+所处格位的对称性明显降低,增大了Eu3+的跃迁几率,从而改善了发光强度。计算Eu3+间的能量传递几率发现,在掺杂浓度为5%时,Eu3+间的能量传递几率很小,其对荧光粉的发光影响不大。     

On the comparisons of system performance and capacity of asynchronous STBC MC‐CDMA multirate access schemes

Three multirate access schemes, multicode, variable spreading gain (VSG), and spectral overlaid multiple‐symbol‐rate (MSR), for asynchronous space‐time block coded (STBC) multicarrier code division multiple access (MC‐CDMA) systems are proposed. The three possible spectral overlaid configurations for MSR systems are also investigated. The expressions to evaluate the multiple access interferences, bit error rate (BER) performances, and system capacities of a antenna STBC MC‐CDMA using the three multirate access schemes are obtained. Transmit power allocation is adjusted according to the service rates and the number of active users in each service class to maintain the link quality and to improve the system capacity. Our numerical results show that systems with multicode access scheme using orthogonal Gold spreading codes and with VSG access scheme have similar system performance and capacity, and both perform in general better than systems with MSR access scheme of any spectrum configurations. In case when non‐orthogonal Gold codes are used, multicode access scheme shows degradation in the system capacity as compared to VSG, due to the presence of larger self‐interference (SI) among the codes used by each user. The achievable capacities for the three spectral overlaid configurations of MSR multirate systems are also compared. Copyright © 2007 John Wiley & Sons, Ltd.     

轮廓线优化的多通道三维水墨渲染模型

3维水墨风格模拟是非真实绘图(NPR)的重要课题之一。传统的渲染方法局限于黑白墨色,色彩单一。该文提出一种轮廓线优化的多通道3维水墨渲染模型。首先,利用光照模型配合Alpha通道,完成3维水墨画的内部着色;其次,运用网格模型扩张实现轮廓线的风格化;最后,利用表优先级3维深度排序算法隐去Alpha通道中多余的轮廓线,实现3维水墨渲染图像输出。实验结果表明,该方法渲染效果好,轮廓线优化使水墨效果更加逼真,多通道的渲染图像输出也方便后期的图像处理。     

天波超视距雷达发展综述

在天波超视距雷达系统的短基线多站联合定位中,一般假设多站点电离层反射虚高保持一致,为确定这一假设对定位结果的影响,本文进行电离层探测试验,以研究电离层虚高对多站联合定位精度的影响。试验时分别架设两个接收站模拟短基线超视距雷达系统的接收站点,再在较远距离架设目标站点,利用来自目标站点的发射信号模拟目标的返回信号。本文假设参考站点到目标站点链路的电离层反射虚高和大圆距离是已知的,对于同一工作频率,利用参考站点-目标站点链路上的电离层虚高,去解算定位站点-目标站点之间的大圆距离。参考站点和定位站点相距约90 km情况下,结果显示：目标和定位站(道孚-武汉)大圆距离约为1 260 km时,两条链路的虚高均方根误差约为5.82 km,相应的大圆距离的定位均方根误差约为5.02 km,相对误差约为0.34%;当目标和定位站(乐山-武汉)大圆距离约为1 000 km时,误差分别约为5.5 km, 5.69 km和0.46%。试验结果和理论分析表明,可以从缩短接收站点的布局和降低电离层反射虚高两个方面进一步提高目标定位的精度。本文试验结果可为短基线天波超视距雷达的建设提供较为重要的参考价值。     

On the Economics of 3G Mobile Virtual Network Operators (MVNOs)

The paper assesses the market conditions and dynamics, the architectures and the different approaches for deployment of 3G Mobile Virtual Network Operators (MVNOs), in an attempt to address specific advantages and pitfalls. Following the definition of appropriate service sets and tariff structures, and taking into account demand scenarios, a techno-economic model has been developed, in order to compute key economic indicators. The paper presents techno-economic results of specific business cases and deployment alternatives for an average “large” European country and a smaller, Nordic-type country. Fixed and variable costs have been identified and the business case shows how different service sets lead to different costs. Different MVNO business profiles have been investigated. Profitability for all scenarios and business profiles has been calculated, presented and discussed. Major opportunities and threats, as well as critical parameters and uncertainties have been identified through sensitivity analysis. Dimitris Varoutas holds Physics degree and M.Sc. and Ph.D degrees in electronics and radio-communications from the University of Athens. He is a research fellow and adjunct lecturer in the Department of Informatics and Telecommunications of University of Athens. He is also an adjunct lecturer in the Department of Telecommunications of the newly founded University of Peloponnese. He has participating in numerous European R&D projects in the RACE I &II, ACTS, Telematics, RISI and IST framework in the areas of telecommunications and Technoeconomics. He is an adviser in several organisations including OTE and EETT (Greek NRA for telecommunications) in the fields of telecommunications, broadband and mobile services, licensing, spectrum management, pricing and legislation. His research interests are optical, microwave communications and technoeconomic evaluation of network architectures and services. He has more than 30 publications in refereed journal and conferences in the area of telecommunications, optoelectronics and technoeconomics. He is a member of IEEE and serves as reviewer in several journals and conferences. Dimitris Katsianis received the Informatics degree and the M.Sc in Signal Processing and Computational Systems from the University of Athens. He is a research fellow in the Informatics Department of University of Athens. He was technical consultant scientific co-operator for Hellenic Telecommunication Organisation (OTE) in networking aspects concerning simulation of ATM networks and Management in an all Optical network, participating in several Eurescom (European Institute for Research and Strategic Studies in Telecommunication) projects. He was consultant in investment analysis projects for OTE Consulting S.A. He was also technical consultant in Telecommunication and signal processing for Space Hellas and technical consultant in Networking Applications for ICL-Hellas. He was participating in several ACTS and IST projects (AC364 OPTIMUM, AC364TERA, IST 25172-TONIC, etc.) as the case study leader for 3G and 4G business cases. He has more than 25 publications in journal and conferences in the field of techno-economics and 3G-network design. Thomas Sphicopoulos received the Physics degree from Athens University in 1976, the D.E.A. degree and Doctorate in Electronics both from the University of Paris VI in 1977 and 1980 respectively, the Doctorat Es Science from the Ecole Polytechnique Federale de Lausanne in 1986. From 1976 to 1977 he worked in Thomson CSF Central Research Laboratories on Microwave Oscillators. From 1977 to 1980 he was an Associate Researcher in Thomson CSF Aeronautics Infrastructure Division. In 1980 he joined the Electromagnetism Laboratory of the Ecole Polytechnique Federal de Lausanne where he carried out research on Applied Electromagnetism. Since 1987 he is with the Athens University engaged in research on Broadband Communications Systems. In 1990 he was elected as an Assistant Professor of Communications in the Department of Informatics, in 1993 as Associate Professor and since 1998 he is a Professor in the same Department. His main scientific interests are Microwave and Optical Communication Systems and Networks and Techno-economics. He is leading about 30 National and European R&D projects (RACE I and II, ACTS, RISI, HCM, COST, Eurescom, etc.) including Synthesis and TITAN. He has more than 80 publications in scientific journals and conference proceedings. He is also a reviewer in journals of IEEE and IEE and auditor and evaluator of RACE and ACTS projects. He is the Chairman of the IEEE LEOS Chapter (Bulgaria, Greece, Romania and Yugoslavia). From 1999 he is advisor in several organisations including EETT (Greek NRA for telecommunications) in the fields of market liberalisation, spectrum management techniques and technology convergence. Kjell Stordahl received his M.Sc. from Oslo University in 1972. He has been at the Research Department Telenor for 15 years; 7 years as a manager of the Teletraffic field. He joined Telenor Networks in 1989 as Chief Planning Manager until 1996. He has been manager of Market analysis in Telenor Networks 1997–2002. Kjell Stordahl was appointed associated reporter and special reporter 1981–1988 in CCITT SGII for “Forecasting International Traffic”. From 1985 to 1988 he participated in CCITT GAS 10 and developed a forecasting handbook. He has also worked for ITU's headquarter as a specialist on forecasting. From 1994 to 1997 he was on the Board of Telenor Consult AS. He was referee for Project Imagine 21 in the ESPRIT Programme 1999–2001. Kjell Stordahl was on the Technical Advisory Board of Virtual Photonics 2000–2002. Since 1992 he has participated in various projects funded by the European Commission: RACE/TITAN, ACTS/OPTIMUM and TERA, IST/TONIC and CELTIC/ECOSYS. Kjell Stordahl has published over 150 papers in International Journals and Conferences.     

基于多视点视频特征的3D-HEVC深度视频信息隐藏算法

为了更安全地传输秘密信息和保护3D视频,提 出基于多视点视频特征的3D-HEVC深度视频信息隐 藏算法。首先结合彩色视频的纹理特征,考虑深度视频不同区域对绘制视点的质量和编码效 率的影响,对 深度视频进行区域分割。然后针对不同的区域,采用不同的方式调制最大编码单元(LCU) 的QP值嵌入 秘密信息。最后,用修改后的QP值进行编码压缩,传输视频信息。实验仿真结果表明,相 比于原始HTM13.0, 本算法编码重建深度视频绘制视点质量的PSNR平均下降0.0015dB, 码率平均增加0.035%。本文算法 能较好地保证绘制视点的质量,对视频流的码率影响较小,且能实现秘密信息的盲提取。