基于光流法优化的人群异常行为检测研究

危害社会公共安全的事件时有发生，但目前使用的监控摄像头存在画面不清晰、需人为查看且耗时长等问题，故研究高效稳定的智能监控系统对维护公共安全和秩序有着重要意义。针对人群中异常行为的检测问题，文中提出一种改进ORB光流算法，根据运动能量的变化对异常行为进行检测和判断。该方法利用SURF中的Hessian矩阵进行特征点提取，使其具有尺度不变性；采用盒式滤波器替换高斯滤波器进行图像降噪，提高计算速度；使用Shi-Tomasi算法对特征点进行筛选，再与金字塔LK光流法进行匹配，提高检测速度和精度；通过计算MRF模型的能量函数来判断人群中异常行为是否发生，并进行异常区域定位。最后，在UCSD数据集中对所提方法进行验证。多种场景下的ROC曲线和AUC值对比结果表明，所提算法具有良好的性能，可以有效地检测出人群中的异常行为。     

基于元胞自动机的高速公路收费设计

文章在事故预防、吞吐量、成本等方面分析特定收费广场设计的性能,并运用主成分分析法确定公路收费站的评价模型。在建立评价模型的基础上,利用元胞自动机模型对收费亭数量以及形状等方面进行优化。     

移动通信室内分布系统设计之我见

当前运营商移动通信网络规模不断扩大,室内分布覆盖已成为各运营商深度覆盖的常用手段,本文从室内分布系统设计涉及的信源规划设计、天馈系统设计、深度覆盖模型设计等方面进行分析.     

Cross section of the impact single ionization of B2＋ by H＋

The ionization process of B2+ by H+ impact is studied using the continuum-distorted-wave eikonal-initial-state (CDW-EIS) method and the modified free electron peak approximation (M-FEPA), respectively. Total, single-, and double- differential cross sections from 1s and 2s orbitals are presented for the energy range from 10 keV/u to 10 MeV/u. Comparison between the results from the two methods demonstrates that the total and single-differential cross sections for the high-energy incident projectile case can be well evaluated using the simple M-FEPA model. Moreover, the M-FEPA model reproduces the essential features of the binary-encounter (BE) bump in the double-differential cross sections. Thus, the BE ionization mechanism is discussed in detail by adopting the M-FEPA model. In particular, the double- and single-differential cross sections from the 2s orbital show a high-energy hip, which is different from those from the 1s orbital. Based on Ref. [1], the Compton profiles of B2+ for 1s and 2s orbitals are given, and the hips in DDCS and SDCS from the 2s orbital are explained.     

一种配电光纤通信网络架构技术研究

针对配电光纤通信网建设中网架规划难度大、网络覆盖存在盲区、接入工程通信投资占比高等问题,文章提出了一种基于工业以太网双纤自愈环组网方式的新型网络架构研究思路,按照"通信区域同步,适度超前布局"的原则,建立分层分级、点线面结合的架构模型,实现光纤网络分区分层集结,建设安全、可靠、经济、扩展性好的通信网络架构,可主动适应配电信息业务对通信的接入要求,为智能配电网建设提供有力支撑。     

基于流量分析的网络态势感知系统研究

为了宏观把握网络的状态,以流量数据为网络态势感知的主要参考指标,运用流量特性构建网络态势感知模型,得出了基于流量的网络态势感知评价体系,据此制定态势感知系统,通过验证,证明其可行性。     

连铸二级模型系统的设计

连铸二级模型系统实现连铸生产过程的自动生产、跟踪,通过计算得到更为精确、科学的数据指导生产,降低了劳动成本,提高生产效率,并将一级与三级有效的进行衔接,实现完整的信息化生产流程。     

SEP2.0通信协议研究

由Wi- Fi、ZigBee、HomePlug与HomeGrid等成员推动的Smart Energy Protocol 2.0（SEP2.0）标准能够通过智能设备中的应用程序，实现家庭内部的能源管理，提高能源利用效率，节能降耗，有效支撑智能电网，论文对SEP2.0的发展及主要内容进行了研究。     

Effects of ultra-strong magnetic field on electron capture rates of 55C0 and 56Ni in the magnetar surrounding

The electron capture rates of 55Co and 56Ni in the ultra-strong magnetic field at four typical temperature- density points have been calculated using the nuclear shell model and Landan energy levels quantized approximate correction. The results show that the electron capture rates of 55Co and 56Ni are increased greatly in the ultra-strong magnetic field, and even exceed two orders of magnitude in the range from 4.414×10^13G to 2.207×10^27 G. The change rate of electron abundance, ye, of 55Co and 56Ni under the condition of B=4.414×10^15G in the magnetar surrounding has been calculated and discussed, the proportions of ye of 55Co and 56Ni in the total Ye have been reduced by 50 percent in all more than the condition without a magnetic field.