一起252kV组合电器局放异常信号分析处理

特高频检测技术作为一种有效的局部放电检测技术,目前已在组合电器(GIS)检测中广泛应用。在带电检测过程中检测到一处252 k V GIS盆式绝缘子有特高频异常信号。对盆式绝缘子进行X光探伤检测,发现内部存在数厘米长度气孔,该结果与特高频法检测及定位结论相一致。对该盆式绝缘子进行工频耐压试验及脉冲电流法局部放电试验,却均满足出厂试验的要求,说明厂内传统的检测方法有其一定的局限性。针对这个情况,提出了增设盆式绝缘子出厂前特高频局部放电检测等建议,从而进一步提高盆式绝缘子的出厂质量。     

互动实弹模拟射击影视靶自动报靶系统功能技术设计规范

文章对当前我国军警建设互动实弹模拟射击影视靶自动报靶系统的技术规范要求进行了论述,对警用互动实弹模拟电影靶从系统组成、系统功能、技术规范等进行了研究设计,以期对我国靶场规范化建设有指导作用。     

旁路带电作业在架空配电线路检修上的应用分析

文章通过引入旁路带电作业的概念,介绍了旁路带电作业在架空配电线路上的具体应用(包括应用范围,特制工器具和具体的应用检修项目),并重点分析了旁路带电作业在带电更换架空线路导线和带电更换配电变压器上的应用。     

电视综艺节目环绕声直播的声音创作观(下)

"电视综艺节目环绕声直播的声音创作观(上)"就哈里斯先生在环绕声电视综艺节目直播的声音创作实践与观念,讲述了格莱美颁奖典礼电视直播混音二十年的发展历程与变革。"电视综艺节目环绕声直播的声音创作观(中)"和"电视综艺节目环绕声直播的声音创作观(下)"分别回顾了在中影基地进行杜比培训期间,同大师关于电视环绕声创作的交流,以及对电视综艺节目环绕声直播的声音创作观念的若干思考。     

OTT_TV的直播解决方案

组播技术是OTT电视直播的解决方案之一。首先介绍了OTT TV的发展现状与存在的一些问题,然后介绍了组播的技术要点,同时,根据OTT中直播电视的使用场景,分析了直播电视的技术要求,提出了组播技术应用于直播电视的可行性方案,结果表明该方案运行良好。     

3GPP LTE‐Assisted Wi‐Fi‐Direct: Trial Implementation of Live D2D Technology

This paper is a first‐hand summary on our comprehensive live trial of cellular‐assisted device‐to‐device (D2D) communications currently being ratified by the standards community for next‐generation mobile broadband networks. In our test implementation, we employ a full‐featured 3GPP LTE network deployment and augment it with all necessary support to provide real‐time D2D connectivity over emerging Wi‐Fi‐Direct (WFD) technology. As a result, our LTE‐assisted WFD D2D system enjoys the required flexibility while meeting the existing standards in every feasible detail. Further, this paper provides an account on the extensive measurement campaign conducted with our implementation. The resulting real‐world measurements from this campaign quantify the numerical effects of D2D functionality on the resultant system performance. Consequently, they shed light on the general applicability of LTE‐assisted WFD solutions and associated operational ranges.     

Transient Absorption: A New Modality for Microscopic Imaging of Nanomaterials in Living Cells

Transient absorption is a secondary absorption that happens after a material has been excited through primary absorption. Different mechanisms can contribute to transient absorption. This universal photophysical process exists in almost all types of nanomaterials, making it an ideal modality to monitor the location, dynamics, and interactions of nanomaterials in living cells, tissues, or animals. With two beams of lasers and a scanning microscope, transient absorption microscopy is able to acquire high‐resolution, 3D images at high speed, without the need for labeling. Through time‐delay adjustments of pulse trains, this novel method can also reveal background‐free images of specific nanomaterials, even with the interference of high concentrations of fluorophores.     

某医院医技楼结构设计分析

通过对医技楼的结构设计分析,阐述了医技楼结构设计的特点,分析了可在±0.000加连系梁或加大框架柱截面来解决首层层高较大,楼层侧向位移较难控制的问题,计算结果表明：本工程的各项计算结果均满足规范要求,对类似工程有一定的借鉴作用。     

对地下室顶板上消防车活荷载合理取值的探讨

针对2006年版《建筑结构荷载规范》( GB 50009-2001)第4.1.1条对消防车活荷载规定的缺陷,分别以板和梁为研究对象,考虑车台数、覆土厚度、计算跨度等因素,按内力(弯矩)等值的原则,计算出不同条件下的消防车等效均布活荷载,进而归纳出适于设计应用的取值.研究表明:覆土对qe有明显的折减作用,是影响qe取值的...     

浅谈SNG在电视新闻直播中的应用

SNG实现了电视新闻事件的现场实况报道,让观众同步目睹新闻事件的发生,开启了非计划性的、非常态化的、动态性的电视新闻直播技术新篇章。文章首先介绍了SNG的概念及技术原理,接着分析了SNG对电视新闻直播的影响,最后对SNG在电视新闻节目中的应用形式和弱点进行了总结。