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Chatrpol Pakasiri, Ke-Chung Hsu and Sen Wang
In this paper, a wideband VCO that covers popular Long-Term Evolution (LTE) 0.7 GHz and LTE 2.6 GHz frequencies is designed and developed in a standard 0.18 µm CMOS process. The VCO utilizes active inductors to achieve coarse-tuning of the inductance and...
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Zikang Jin, Zonghan Yu, Fanshuo Meng, Wei Zhang, Jingzhi Cui, Xiaolong He, Yuedi Lei and Omer Musa
The parametric design method is widely utilized in the preliminary design stage for hypersonic vehicles; it ensures the fast iteration of configuration, generation, and optimization. This study proposes a novel parametric method for a wide-range, wing-mo...
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Zijian Zhang and Ziqi Jiang
Detonation initiation is a prerequisite to normal operations of an oblique detonation engine (ODE), and initiation-assistant measures are imperative in cases of initiation failure that occur in a length-limited combustor under wide-range flight condition...
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Mingyuan Jiang and Shuangxia Niu
Stand-alone wind power generator.
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Jiafeng Zhang, Guangli Cheng, Jinsong Tang, Haoran Wu and Zhen Tian
Uncompensated motion errors can seriously affect the imaging quality of synthetic aperture sonars (SASs). In the existing line-by-line motion compensation (MOCO) algorithms for wide-beam multiple-receiver SAS systems, the approximate form of the range hi...
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Shuaibin An, Jianwen Zang, Ming Yan, Baiyang Zhu and Jun Liu
Wide-speed-range vehicles are characterized by high flight altitude and high speed, with significant changes in the flight environment. Due to the strong uncertainty of its aerodynamic characteristics, higher requirements are imposed on attitude control....
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Zonghan Yu, Guoping Huang, Ruilin Wang and Omer Musa
In this work, a new spillage-adaptive bump inlet concept is proposed to widen the speed range for hypersonic air-breathing flight vehicles. Various approaches to improve the inlet start-ability are summarized and compared, among which the bump-inlet patt...
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Xiaohui Sun, Houbing Huang, Hasnain Mehdi Jafri, Junsheng Wang, Yongqiang Wen and Zhi-Min Dang
The ferroelectric (FE) to antiferroelectric (AFE) phase transition tuning the temperature range of electrocaloric (EC) effects was investigated using phenomenological Landau?Devonshire theory. Contrary to ferroelectric to paraelectric (PE) phase transiti...
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Mehmet Ali Ertürk, Muhammed Ali Aydin, Muhammet Talha Büyükakkaslar and Hayrettin Evirgen
Internet of Things (IoT) expansion led the market to find alternative communication technologies since existing protocols are insufficient in terms of coverage, energy consumption to fit IoT needs. Low Power Wide Area Networks (LPWAN) emerged as an alter...
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Shuheng Qiu and Haifeng Wang
Wave energy, a high-quality renewable energy, is abundant in reserves and relatively stable. However, the wave energy power of the same sea area varies greatly in different seasons. The traditional linear generator cannot work efficiently in such a wide ...
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Di Zhu, Zilong Hu, Yan Chen, Chao Wang, Youchao Yang, Jiahao Lu, Xijie Song, Ran Tao, Zhengwei Wang and Wensheng Ma
Two-stage double-suction centrifugal pumps have both a large flow and high head. However, due to the complexity of their flow passage components, efficiency has always been a major problem, and the corresponding head is also prone to insufficiency. In th...
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Bor-Ren Lin and Kun-Yi Chen
A new hybrid inductor-inductor-capacitor (LLC) converter is investigated to have wide voltage input operation capability and zero-voltage turn-on characteristics. The presented circuit topology can be applied for consumer power units without power factor...
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Yan Wang, Hao Wu, Chao Chen, Yinli Zhou, Yubing Wang, Lei Liang, Zhenhua Tian, Li Qin and Lijun Wang
External cavity diode laser emitting at around 1550 nm with an ultra-high side mode suppression ratio can be applied in the field of high-dynamic-range testing and measurement.
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Ondrej Novak, Marek Bobcik, Martin Luxa, Jaroslav Fort, Bartolomej Rudas, Jaroslav Synac, David Simurda, Jiri Furst, Jan Halama, Vladimir Hric, Jaromir Prihoda and Zdenek Simka
Recent trends in the electric energy market such as biomass, waste incineration or combined cycle power plants require innovative solutions in steam turbine design. Variable operating conditions cause significant changes in flow field surrounding the ste...
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Luiz Oliveira, Joel J. P. C. Rodrigues, Sergei A. Kozlov, Ricardo A. L. Rabêlo and Victor Hugo C. de Albuquerque
Due to the wide variety of uses and the diversity of features required to meet an application, Internet of Things (IoT) technologies are moving forward at a strong pace to meet this demand while at the same time trying to meet the time-to-market of these...
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Vadim Palchikovskiy, Aleksandr Kuznetsov, Igor Khramtsov and Oleg Kustov
A comparison is considered of the experimentally obtained impedance of locally reacting acoustic liner samples with the impedance calculated using semi-empirical Goodrich, Sobolev and Eversman models. The semi-empirical impedance models are outlined. In ...
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Jie Miao, Houpeng Chen, Yu Lei, Yi Lv, Weili Liu and Zhitang Song
The thermoelectric generator (TEG) stands out among many energy harvesters due to its simple structure, small size, rich thermal energy, and the absence of pollution and noise. However, previous studies have rarely probed into the influence of TEG intern...
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Tilman Raphael Schröder, Hans-Josef Dohmen, Dieter Brillert and Friedrich-Karl Benra
In the side-chambers of radial turbomachinery, which are rotor?stator cavities, complex flow patterns develop that contribute substantially to axial thrust on the shaft and frictional torque on the rotor. Moreover, leakage flow through the side-chambers ...
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Valentyn Glyva,Natalia Kasatkina,Vasyl Nazarenko,Nataiia Burdeina,Nataliia Karaieva,Larysa Levchenko,Olena Panova,Oksana Tykhenko,Batyr Khalmuradov,Oleksiy Khodakovskyy
Pág. 40 - 47
Composites were shown to be the most promising materials for protection against electromagnetic fields. A technology of magnetic treatment of textile material with magnetic fluid and technology of ultrasonic treatment of a mixture of latex and iron ore c...
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Constantinos F. Panagiotou, Fotos S. Stylianou, Elias Gravanis, Evangelos Akylas and Constantine Michailides
In this paper, we propose an algebraic model for turbulent scalar-flux vector that stems from tensor representation theory. The resulting closure contains direct dependence on mean velocity gradients and quadratic products of the Reynolds stress tensor. ...
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