ID 原文 译文
25495 文章从几何的视角出发，以四点二重插值细分格式的几何解释为基础，对四点三重插值细分格式的几何意义进行分析，改造格式使其融合逼近细分，进而得到一类带参数的混合型三重细分格式。 From the perspective of geometry, based on the geometric interpretation of the four-point binary interpolating subdivision scheme, this paper analyzes the geometric meaning of the four-point ternary interpolating subdivision scheme, and modify the scheme to combine approximating subdivision; then a blending ternary subdivision scheme with parameters is obtained．
25496 诸多已有的插值型细分和逼近型细分都是该格式的特例，采用生成多项式方法分析了其 Ck连续性。 Many existing interpolating subdivision schemes and approximating subdivision schemes can be seen as special cases of this scheme． We also use generating polynomial method to analyze the Ck continuity of limit curve produced by the blending subdivision．
25497 得到了一种新的 C4连续五点三重曲线细分格式。 A new C4 continuous five-point ternary curve subdivision scheme is obtained．
25498 数值实例表明，利用提出的混合型细分法通过参数的适当选取可以实现对极限曲线的形状控制。 Numerical examples show that the proposed blending subdivision scheme can be used to control the shape of limit curves by selecting appropriate parameters．
25499 覆盖是评价视频传感器网络对监测区域感知质量的重要指标。 Coverage is an important metric for evaluating the sensing quality of visual sensor networks (VSNs)．
25500 与传统的覆盖问题不同，随着目标的移动，全视角覆盖需要从任意方向捕捉到目标的有效正面，其覆盖估计问题也更加复杂。 Unlike traditional coverage issues, full-view coverage requires to capture target's effective face from any direction, and its coverage estimation issue is more complicated．
25501 目前，大量的研究工作主要假设同构节点随机部署在监测区域内以实现全视角覆盖，本文研究异构视频传感器网络全视角覆盖估计问题，为消除边界效应，提出了扩展监测区域及最大探测区域的概论，并推导出目标全视角覆盖估计模型，通过实验对场景仿真值及模型理论值进行比较分析，结果表明它们之间的平均绝对覆盖误差基本保持在 6. 5% 以内。 At present, most of literatures assume that a great number of homogeneous visual sensors are randomly scattered in the monitoring area to achieve full-view. This paper studies the full-view estimation problem in heterogeneous VSNs. In order to eliminate the boundary effect, the concepts of extended monitoring area and maximum detection area are introduced. To evaluate the performance of the proposed full-view estimation expression，several simulation experiments are conducted to validate the theoretical results. The results show that the mean absolute coverage error between the theoretical values and the experimental values is controlled less than 6. 5% ．
25502 利用大功率高频(HF)电波调制加热电离层可在电离层中有效形成辐射源，并用于辐射 ELF 电磁波．本文基于磁流体力学的基本方程通过对电离层中极低频(ELF)辐射源的辐射场分析，获得 ELF 电磁波在电离层中传播的色散关系式，建立电离层中的 ELF 辐射源向下传播衰减模型。 Sources and resultant radiations of extremely low frequency (ELF) electromagnetic waves can be effectively generated via modulated heating of the ionosphere by powerful high-frequency (HF) waves. With fundamental equations of magneto-hydrodynamics, the radiation field of the ELF radiation source in the ionosphere is derived. The dispersion relation of ELF waves propagating in the ionosphere is then obtained and the downward propagation at tenuation model is established．
25503 并依据建立的传播衰减模型，分析不同纬度地区传播衰减的差异，以及传输频率和背景电离层参数对传播衰减的影响。 According to this model, the differences of propagation attenuation in distinct latitudes and influences of transmitting frequency and ambient ionospheric parameters on propagation attenuation are analyzed．
25504 大数据应用能够为人们的生活和工作方式提供便捷，但包含消费记录、社交关系、地理位置等个人隐私信息的数据在发布过程中可能被服务提供商收集，用户隐私面临巨大威胁。 Big data applications provide convenience for people's life and work style, but in the process of data publishing, personal privacy information, such as consumption records, social relations, and so on, are collected by service pro-viders all the time, and users' privacy is threatened greatly．