基于D-S推理的模糊模式识别方法

针对战场环境下数据融合系统的ESM设备获得的辐射源信息在时间上的冗余性,提出了一种基于D-S证据推理的模糊模式识别方法。该方法通过对观测样本信任度(模糊隶属度)的重新分配,有效地解决了辐射源信息不确定性问题,提高了辐射源的正确识别率。最后通过单一的模糊识别和D-S证据组合的模糊识别两种方法的仿真对比实验验证了后者的有效性。     

基于STL的斜壁结构支撑及自动生成算法

为进一步降低熔丝沉积成形设备的运行成本,同时提高成形效率,设计一种斜壁结构的支撑,基于STL模型提出并实现其自动生成算法.实验证明该支撑结构与常用直壁结构支撑相比,不仅能够有效辅助零件实体的成形过程,而且能够尽可能地减少支撑材料消耗量和成形时间.算法实用可靠,已成功集成至Power RP软件支撑模块中.     

我国大型公益性体育赛事商业化运作研究

对公益性体育赛事商业化运作这一概念进行了界定,对大型公益性体育赛事商业化运作的必要性、可行性以及投入产出进行了研究,最后提出创建公益性赛事公司的必要性。     

蒸发波导中雷达异常性能的仿真与分析

蒸发波导是海洋大气环境中一种常见的异常折射结构,它能够陷获电磁波并改变电磁波的传播轨迹,进而影响雷达对目标的探测性能。主要通过构建雷达性能评估的仿真模型和方法,利用仿真的结果分析了蒸发波导环境中雷达的异常探测特征。首先介绍了基于电磁波传播的抛物数值方程以及裂步傅立叶算法技术的雷达探测评估方法,应用这一方法对不同蒸发波导环境下雷达的探测进行仿真计算,分析了由于大气波导环境的影响所产生的雷达低空异常探测特征。     

表面波导条件下雷达的探测特征

大气波导会使雷达电磁波传播产生异常现象 ,研究其对雷达探测范围的影响具有重要意义。利用抛物方程模式及分步傅里叶算法对电磁波在表面波导条件下的传播进行数值模拟 ,给出了雷达探测区域的评估模式。结合在福建平潭的试验对模式的正确性加以验证 ,论述了舰载主动雷达在表面波导条件下探测时所产生的超视距、波导顶部盲区和跳跃盲区等现象 ,得出了雷达在表面波导条件下的探测特征。     

企业体育赞助浅析

针对我国企业界对体育赞助的种种困惑，提出了调查企业内外部环境、选择和确定正确的赞助对象、实行与企业发展目标相吻合的赞助策略等一系列提高体育赞助效益的建议。     

Research on the Mechanism of Accelerator for Photocurable Resin in 3D Printing

The photopolymerization kinetics of cycloaliphatic epoxide and oxetane with accelerators were investigated with Real-time Fourier transform infrared spectroscopy (RT-FTIR). The consumption rates of epoxy group and oxetane group as a function of time were obtained by monitoring of the absorption peaks in the 789 cm-1 and 981 cm-1. The effect of accelerators type and the accelerating mechanism were discussed. In general, benzyl alcohol and its analogues with electron-donating substituents are useful accelerators for the cationic polymerization of cycloaliphatic epoxide and oxetane. Activated monomer mechanism and free-radical chain-induced decomposition of onium salt cationic photoinitiator account for the observed accelerating effect on the polymerization rate.     

Slice Data Based Support Generation Algorithm for Fused Deposition Modeling

This paper presents a robust algorithm to generate support for fused deposition modeling (FDM). Since many flaws appear in most stereo lithography (STL) models, this algorithm utilizes slice data as input. A top-down approach was used to calculate the support slice layer by layer. The generation algorithm was described in detail including the slice grouping, oriental bounding box (OBB) calculation, offsetting, and Boolean operations. Several cases are given to validate the efficiency and robustness of the procedure. The algorithm provides necessary support not only for hanging surface but also for hanging vertexes and edges with O(n) time complexity, where n is the number of layers. The algorithm fully utilizes the parts’ self-support ability and reduces support volume to the maximum extent. This slice data based algorithm has the same efficiency as the STL based algorithm but is more stable, which significantly enhances the robustness of the support generation process.     

小企业发展中存在的问题及对策

小企业是国民经济的重要组成部分，对经济发展和社会稳定起着很大的促进作用。从企业财务管理、人员管理、职能设置、多元化经营、市场营销和品牌经营等方面分析了小企业在发展过程中存在的问题，并提出了一些有针对性的对策和建议。