抑制CATV系统重影干扰的实践

本文仅从实践的角度探讨分析影响图像质量的三种因素,并提出了一些具体的抑制方法。     

NZ-24仪器软件故障的快速解决方法

NZ-24地震仪在野外施工时软件经常出现故障，要恢复软件既烦琐，又耗时。利用Ghost软件可快速备份和恢复仪器整个硬盘数据，一旦软件再出故障，只需做简单的硬盘数据恢复即可。本文介绍了使用Ghost软件快速备份、恢复数据的具体方法。     

基于PXE技术的网络机房高效管理方案

从PXE无盘启动技术、Multicast技术的基本原理出发,介绍了一种快速安装和部署大批量计算机软件系统的方法。实践表明,该方法能够显著提升网络机房管理维护效率、降低机房工作人员的工作强度、简化计算机网络机房的管理维护工作,可广泛应用于公共网络机房的系统部署、软件分发和灾难恢复。     

基于轻量级图卷积的人体骨架动作识别方法

视频中的人体动作识别在计算机视觉领域得到广泛关注,基于人体骨架的动作识别方法可以明确地表现人体动作,因此已逐渐成为该领域的重要研究方向之一。针对多数主流人体动作识别方法网络参数量大、计算复杂度高等问题,设计一种融合多流数据的轻量级图卷积网络,并将其应用于人体骨架动作识别任务。在数据预处理阶段,利用多流数据融合方法对4种特征数据流进行融合,通过一次训练就可得到最优结果,从而降低网络参数量。设计基于图卷积网络的非局部网络模块,以捕获图像的全局信息从而提高动作识别准确率。在此基础上,设计空间Ghost图卷积模块和时间Ghost图卷积模块,从网络结构上进一步降低网络参数量。在动作识别数据集NTU60 RGB+D和NTU120 RGB+D上进行实验,结果表明,与近年主流动作识别方法ST-GCN、2s AS-GCN、2s AGCN等相比,基于该轻量级图卷积网络的人体骨架动作识别方法在保持较低网络参数量的情况下能够取得较高的识别准确率。     

利用Norton Ghost维护计算机系统

利用Ghost维护计算机系统的方法。     

巧用GHOST多播功能实现网络克隆

对目前计算机网络机房维护技术中，采用的Ghost多播功能进行了详细的研究，并详细指出了进行网络克隆快速恢复计算机软件系统的具体实现步骤。     

Two-dimensional deghosting for EPI

A residual ghost artefact in echo-planar imaging (EPI) remains after the standard correction procedure based on a 1-dimensional phase-modulation of the spectra of even or odd echoes. A better reduction of this artefact is demonstrated using a 2-dimensional phase correction. The phase correction map is measured inside the ghost-free region of the image, preferably in a reference scan with an increased field of view, as the phase difference between complex images reconstructed separately from even and odd echoes. An extrapolated map consisting of spatial components up to the second order (constant,x, y, xy andx ²−y²) is then found by a fit to the measured values. This map is used to correct the phase of even- and odd-reconstructed images before adding them. This procedure may cause some spatially dependent loss of signal, but if the level of the residual artefact is less than 20% of the image intensity, such losses are negligible.     

Motion retargeting and evaluation for VR-based training of free motions

Virtual reality (VR) has emerged as one of the important and effective tools for education and training. Most VR-based training systems are situation based, where the trainees are trained for discrete decision making in special situations presented by the VR environments. In contrast, this paper discusses the application of VR to a different class of training, for learning free motion, often required in sports and the arts. We propose a VR-based motion-training framework that contains an intuitive motion-guiding interface, posture-oriented motion retargeting, and an evaluation and advice scheme for corrective feedback. Applications of the proposed framework to simple fencing training and a dance imitation game are demonstrated.     

浅谈学校机房管理和维护的策略

学校学生机房的管理是公认的难题,常常由于学生误操作或病毒等原因造成系统文件丢失,使计算机不能正常启动,或者使一些软件不能正常使用。利用Ghost软件、隐藏盘符和保护卡等策略可以轻松实现对机房管理和维护。     

Dynamic response of deformable structures subjected to shock load and cavitation reload

The dynamic response of deformable structures subjected to shock load and cavitation reload has been simulated using a multiphase model, which consists of an interface capturing method and a one-fluid cavitation model. Fluid–structure interaction (FSI) is captured via a modified ghost fluid method (Liu et al. in J Comput Phys 190: 651–681, 2003), where the structure is assumed to be a hydro-elasto-plastic material if subjected to a strong shock load. Bulk cavitation near the structural surface is captured using an isentropic model (Liu et al. in J Comput Phys 201:80–108, 2004). The integrated multiphase model is validated by comparing numerical predictions with 1D analytical solutions, and with numerical solutions calculated using the cavitation acoustic finite element (CAFé) method (Sprague and Geers in Shocks vib 7:105–122, 2001). To assess the ability of the multiphase model for multi- dimensions, underwater explosions (UNDEX) near structures are computed. The importance of cavitation reloading and FSI is investigated. Comparisons of the predicted pressure time histories with different explosion center are shown, and the effect on the structure is discussed.