Results 41 to 50 of about 23,176 (169)
Guangtongxin yanjiu, 1984 本文阐述了制作光纤预制棒MCVD工艺石英管管径在线测量装置的测量原理;在线测量的特殊问题;信号处理方法和测量误差分析。对控制系统进行了分析,论证了控制系统的控制方案。最后介绍计算机DDC系统的接口和控制程序。系统达到的控制指标<±0.5mm。
陈建妫, 黄国强
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There Is Always a Bigger Fish. Determinants of Power Perceptions in Swiss Biodiversity Policy
Policy Studies Journal, EarlyView.ABSTRACT The Advocacy Coalition Framework (ACF) views power as crucial in policy processes, but the nature of coalition power, its determinants, and how to empirically measure it remain understudied. In this article, we use a mixed method approach and social network analysis to explore power relationships in the biodiversity policy subsystem in ...
Alix d'Agostino +2 more
wiley +1 more source
Shiyou jixie, 2012 电磁波随钻测量技术是气体、泡沫等非液相钻井的重要测量技术手段。以CEM-1型MWD系统为基础，介绍了系统的构成和工作原理，分析说明了该测量系统的井下发射机系统、非对称偶极子钻杆天线模型、地面接收系统等关键技术，重点分析了低频电磁衰减规律。将该系统在大牛地气田D66-129井进行现场应用，应用结果表明，CEM-1型电磁波随钻测量系统能在钻井液钻井中的循环、起钻和下钻过程中测量和传输数据，并且不受钻井液性质的影响，在电阻率大于4 Ω·m的地层传输深度可达3 081 m，工作时间约216 h ...
刘科满, 王立双, 宋朝辉
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Policy &Internet, Volume 18, Issue 2, June 2026.ABSTRACT AI‐generated images have become so good in recent years that individuals often cannot distinguish them from ‘real’ images. This development, combined with the rapid spread of AI‐generated content online, creates a series of societal risks. Watermarking, a technique that involves embedding information within the content to indicate their AI ...
Bram Rijsbosch +2 more
wiley +1 more source
Gaoya dianqi, 2017 高压直流输电系统直流侧谐波电压的测量对于直流侧滤波器的设计和继电保护设备的配置具有重要意义。为此,文中以±1 100 kV直流输电系统为例,在分析其直流侧谐波电压的产生原因和谐波的特性的基础之上,研究了特高压直流输电系统直流侧谐波电压的测量方法,构建了一套直流侧谐波电压测量系统。同时,在实验室条件下,搭建了该测量系统的测试平台,对它的测量准确度和频率特性进行了验证,并研究了一套完整的数据处理算法。测试结果表明,配合该数据处理算法,直流侧谐波电压测量系统可以对501 200 ...
汪本进 +5 more
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Study on Measurement for Dielectric Property of Microwave Dielectric Resonator [PDF]
, 2016 微波介质陶瓷材料是近几十年发展起来的一种新型的功能电子陶瓷，主要用于微波频段电路中完成一种或多种功能的陶瓷材料，是制造微波介质谐振器和滤波器的关键材料，它具有高介电常数，低介电损耗，温度系数小等优良性能适用于制造多种微波元器件，能满足微波电路小型化，集成化，高可靠性，低成本的要求。在电子对抗，导航，通信，雷达，家用卫星直播电视接收器和移动电话中得到了广泛应用。 微波介质陶瓷材料是电介质材料的一种，具有电介质材料的基本性质。其介电性能可用介电常数ε_r^'，品质因数Q（或损耗角正切 ...
李学漪
core
Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT Composite materials hold significant potential for abrasive sealing, yet composite materials used for abrasive sealing fall short in service durability under extreme environments. Here, a controllable strategy for adjusting pore structure is proposed, aiming to design a YSZ(ESP)/BN@ZrO2‐polyester coating with hybrid micron/nanometer ...
Shuang Yu +8 more
wiley +1 more source
Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT Recovering palladium (Pd) from low‐concentration metallurgical wastewater still poses significant challenges. In this study, triaminoguanidine hydrochloride was used as the key functional site, and three guanidine‐functionalized covalent organic frameworks (GCOFs) were successfully constructed by adjusting the substituents (–H, –OH, and –OCH3)
Jiaxing Xiong +9 more
wiley +1 more source
基于CORBA架构和LabVIEW的分布式电能质量在线监测系统
Gaoya dianqi, 2006 提出了一种基于CORBA架构和LabVIEW的分布式电能质量在线监测系统实现的框架结构来实现对电能质量的指标测量和监控。监测系统由数字测量仪器组成实现数据采集、分析处理、诊断和报警等功能。数字测量仪器采用虚拟仪器技术即LabVIEW软件开发实现硬件测量功能,在网络通信中采用CORBA架构技术实现异构环境下中心控制站与各个监测仪间的远程访问和控制。系统的仿真研究和现场测试均表明该系统能够基本实现电能质量各项指标的监测和分析功能。
张霖, 关根志, 兰国良, 吉磊
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