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961.
电力电子是风力发电的主要技术 总被引:3,自引:0,他引:3
Frede Blaabjerg 《电力电子》2005,3(4):26-30,22
本文回顾风力发电市场,叙述了和传统的电力发电相比,在以后的几年中风能将成为更具竞争力的能源之一。还介绍了固定速度和调整风力发电机以及拓扑结构、不同风力发电系统的比较及控制方案,最后指出风力发电机技术的未来发展趋势是进一步提高功率等级和电力电子技术。 相似文献
962.
963.
Semiconducting Carbon Nanotubes for Improved Efficiency and Thermal Stability of Polymer–Fullerene Solar Cells
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Teddy Salim Hang‐Woo Lee Lydia Helena Wong Zhenan Bao Yeng Ming Lam 《Advanced functional materials》2016,26(1):51-65
The effects of the incorporation of semiconducting single‐walled nanotubes (sc‐SWNTs) with high purity on the bulk heterojunction (BHJ) organic solar cell (OSC) based on regioregular poly(3‐hexylthiophene‐2,5‐diyl):[6,6]‐phenyl‐C61‐butyric acid methyl ester (rr‐P3HT:PCBM) are reported for the first time. The sc‐SWNTs induce the organization of the polymer phase, which is evident from the increase in crystallite size, the red‐shifted absorption characteristics and the enhanced hole mobility. By incorporating sc‐SWNTs, OSC with a power conversion efficiency (PCE) as high as 4% can be achieved, which is ≈8% higher than our best control device. A novel application of sc‐SWNTs in improving the thermal stability of BHJ OSCs is also demonstrated. After heating at 150 °C for 9 h, it is observed that the thermal stability of rr‐P3HT:PCBM devices improves by more than fivefold with inclusion of sc‐SWNTs. The thermal stability enhancement is attributed to a more suppressed phase separation, as shown by the remarkable decrease in the formation of sizeable crystals, which in turn can be the outcome of a more controlled crystallization of the blend materials on the nanotubes. 相似文献
964.
Flexible Transparent Reduced Graphene Oxide Sensor Coupled with Organic Dye Molecules for Rapid Dual‐Mode Ammonia Gas Detection
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Le Thai Duy Tran Quang Trung Vinh Quang Dang Byeong‐Ung Hwang Saqib Siddiqui Il‐Yung Son Seung Kyun Yoon Dong June Chung Nae‐Eung Lee 《Advanced functional materials》2016,26(24):4329-4338
Flexible chemical sensors utilizing chemically sensitive nanomaterials are of great interest for wearable sensing applications. However, obtaining high performance flexible chemical sensors with high sensitivity, fast response, transparency, stability, and workability at ambient conditions is still challenging. Herein, a newly designed flexible and transparent chemical sensor of reduced graphene oxide (R‐GO) coupled with organic dye molecules (bromophenol blue) is introduced. This device has promising properties such as high mechanical flexibility (>5000 bending cycles with a bending radius of 0.95 cm) and optical transparency (>60% in the visible region). Furthermore, stacking the water‐trapping dye layer on R‐GO enables a higher response as well as workability in a large relative humidity range (up to 80%), and dual‐mode detection capabilities of colorimetric and electrical sensing for NH3 gas (5–40 ppm). These advantageous attributes of the flexible and transparent R‐GO sensor coupled with organic dye molecules provide great potential for real‐time monitoring of toxic gas/vapor in future practical chemical sensing at room conditions in wearable electronics. 相似文献
965.
Binwei Deng Xiaoting Li Suen Hou Chonghan Liu Tiankuan Liu 《International Journal of Electronics》2013,100(3):394-403
In this article, an encoder Application Specific Integrated Circuit (ASIC) for high-speed serial data transmission is presented. The ASIC implements a low-latency and low-overhead line code and is fabricated with a commercial 0.25-µm Silicon-on-Sapphire CMOS technology. The ASIC operates at 640 MHz with a latency of no greater than 6.25 ns and the overhead of 14.3%. The encoder will be integrated with a serialiser and will be used in the A Toroidal LHC ApparatuS Liquid Argon (LAr) calorimeter Phase-I trigger upgrade. 相似文献
966.
Transparent Electronics: Thermally Stable Transparent Resistive Random Access Memory based on All‐Oxide Heterostructures (Adv. Funct. Mater. 15/2014)
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967.
电工电子特色实验教学体系的构建与创新研究 总被引:1,自引:0,他引:1
朱静 《南京工业职业技术学院学报》2007,7(2):88-90
通过对实验教学体系深入研究,提出了电工电子实验教学体系全面改革的思路,介绍了创新教育与工程实训、工程综合设计的关系。实践表明,以创新特色教育为目标的电工电子实践教学体系对培养学生的实际操作能力是十分有效的。 相似文献
968.
Miniaturized Flexible Electronic Systems with Wireless Power and Near‐Field Communication Capabilities
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Jeonghyun Kim Anthony Banks Zhaoqian Xie Seung Yun Heo Philipp Gutruf Jung Woo Lee Sheng Xu Kyung‐In Jang Fei Liu Gregory Brown Junghyun Choi Joo Hyun Kim Xue Feng Yonggang Huang Ungyu Paik John A. Rogers 《Advanced functional materials》2015,25(30):4761-4767
A class of thin, lightweight, flexible, near‐field communication (NFC) devices with ultraminiaturized format is introduced, and systematic investigations of the mechanics, radio frequency characteristics, and materials aspects associated with their optimized construction are presented. These systems allow advantages in mechanical strength, placement versatility, and minimized interfacial stresses compared to other NFC technologies and wearable electronics. Detailed experimental studies and theoretical modeling of the mechanical and electromagnetic properties of these systems establish understanding of the key design considerations. These concepts can apply to many other types of wireless communication systems including biosensors and electronic implants. 相似文献
970.
遥感图像星上背景扣除和灰度拉伸方案与实验 总被引:3,自引:0,他引:3
在遥感相机的实际应用中,卫星下传的图像灰度分布往往不佳,针对该问题展开了相关研究。分析了影响卫星下传图像灰度分布的因素,并以遥感相机成像电子学系统的系统参数为基础,给出了3种可行的星上图像背景扣除和灰度拉伸方案;推导了3种方案下获取图像的灰阶丰富程度公式,并确定了最优方案,即采用模拟和数字混合拉伸的办法,对初始量化位数的图像数据进行处理,然后舍掉后若干位,以数传规定位数下传。在实验室条件下,以实际的遥感相机成像系统为依托进行了实验。实验结果表明:文中提出的3种方案均能够实现遥感相机图像的星上背景扣除和灰度拉伸功能;但方案(三)得到的灰阶数量最多,成像效果最好,适合且能够应用于航天遥感相机当中。 相似文献