宁夏电网动态安全评估系统一体化功能设计

为使宁夏电网输配电网全景仿真实验室动态安全评估系统实现对调度生产运行的在线支撑,通过调控中心-实验室在线-离线一体化的功能设计,实现了系统对运行电网安全稳定性进行全方位、多场景、多角度的评估。调控中心在线系统接入电网在线运行数据,运用高性能计算机群并行计算分析,实验室离线支持系统对关键断面进行扩展分析。应用结果表明:动态安全评估系统的实施,深度支撑了电网调度生产运行,同时也验证了设计方案的科学性和合理性。     

空气阻止剂NM360和氯磺化聚乙烯的协同作用对轮胎气密层气密性的影响

在轮胎气密层中使用了空气阻止剂NM360和氯磺化聚乙烯作为增强气密层性能的新材料。当NM360和氯磺化聚乙烯单独使用时,对气密层的气密性能影响不大,但是二者同时使用时,气密层的气密性大幅上升18%。因此,NM360和氯磺化聚乙烯具有协同作用,二者的协同作用可以大大增加气密层的气密性能。     

Virtual cubic panorama synthesis based on triangular reprojection

Cubic panoramas provide an efficient solution to the implementation of immersive and omnidirectional displays for image‐based virtual navigation. To allow unrestricted navigation through the environment, a system must be capable of constructing novel views given the reference images, typically, cubic panoramas. This paper proposes a processing pipeline for cubic panorama synthesis based on 2D/3D triangular reprojection. This pipeline uses matching features to implement the triangular meshing on cubic panoramas, and introduces the matching line constraint, which significantly reduces the artifacts of straight‐line features in the rendered image and accelerates the division process. The modules of this pipeline take the geometrical characteristics of cubic panorama into account. Thus, it can handle the discontinuities of the cube edges when the triangular mesh covers different faces. Furthermore, these modules could be reconfigured to compose customized pipelines and generate virtual cubic panoramas of different quality based on the amount of features. The performance and efficiency of the proposed pipeline is demonstrated with comparison experiments. Copyright © 2013 John Wiley & Sons, Ltd.     

基于全景图的虚拟现实技术在数字博物馆中的研究与应用

介绍了虚拟现实技术和全景图的概念及其在数字博物馆中的实现方法及其应用技术,结合实例说明了文物全景图在英特网中真实展示的实现方法,阐述了虚拟现实技术应用于数字博物馆的意义及实用性。     

V360变频器在金刚石绳锯机上的应用

本文介绍了四方V360系列变频器在金刚石绳锯机上的成功应用。     

四方变频器在注塑机上的应用

本文介绍了四方V360系列变频器在注望机上的成功应用。     

Single-Shot 360-Degree Cranial Deformity Detection System Using Digital Image Correlation

In this paper, a single-shot 360-degree cranial deformity detection system using digital image correlation (DIC) is presented to quickly obtain and detect accurate 3D data of infants’ cranium. By introducing plane mirrors into a stereo 3D DIC measurement system, a multi-view 3D imaging model is established to convert 3D data from real and virtual perspectives into 360-degree 3D data of the tested infant cranium, achieving single-shot and panoramic 3D measurement. Experimental results showed that the performance and measurement accuracy of the proposed system can meet the requirements for cranial deformity detection, which provides a fast, accurate, and low-cost solution medically.     

L360钢在SRB/CO2环境中的腐蚀行为研究

为了探究L360钢在SRB/CO2环境中的腐蚀行为,通过高温高压模拟腐蚀试验以及OM、SEM、EDS、XRD等分析技术,对L360钢的显微组织及其在SRB/CO2环境中的腐蚀速率、腐蚀形貌和腐蚀产物膜成分进行了分析。结果显示,在模拟腐蚀溶液中,L360钢属于极严重腐蚀。L360钢在含SRB的CO2腐蚀环境中SRB发生膜下腐蚀,膜层在高流速环境中受剪切力破损,使膜层对基体的保护作用降低,模拟环境溶液中的Cl-进入膜层裂缝在基体金属表面活性高的位置发生富集。试验表明,SRB腐蚀形成的点蚀坑为Cl-提供了良好的富集点,导致点蚀快速成长,腐蚀加剧,且表面腐蚀产物为FeS和少量的FeCO3。     

An improvement for the McGill University Random Number Package

This paper documents and provides code for two new entry points which increase the flexibility of the McGill University Random Number Package. With these additions the user can access internal locations containing the pseudo-random integers that control the random sequences produced by the generator. A detailed example of the use of the new entry points is provided. Finally, some comments about the documentation of random number generators are made.     

某台2246B/1201型排粉机振动故障分析与处理

某电厂2×360MW机组锅炉排粉机运行中出现轴承轴向振动故障,解体检修发现振动故障是排粉机运行过程中2号轴承的内圈与轴颈配合出现松动,造成轴颈和轴凸肩摩擦、轴承内圈与轴颈磨损所致。更换排粉机全套转轴和轴承后故障消除,运行中轴承振动均处于良好状态。