17,541 research outputs found
Wu Yue chun qiu / [Zhao Ye zhuan].
No full text880-03 Chu ban. Reprint of Ming Hongzhi Guang Fan ke ben.; Bound with: Wu chao ming chen yan xing lu.; Electronic reproduction. Vol. 64. Canberra, A.C.T. : National Library of Australia, 2011
A MEMS sensor for stiffness change sensing applications based on three weakly coupled resonators
No full textMicro-electro-mechanical (MEM) resonator devices have been widely used to sense small changes in the properties of the resonator, namely the stiffness and mass of the resonator. Among these, sensing devices that detect stiffness change have been employed for many applications, including accelerometers, strain sensors, pressure sensors and force gradient sensors for imaging microscopy. In recent years, a new sensing approach, which utilises 2 degree-of-feedom (DoF) weakly coupled resonators has been proposed. By measuring the mode shape changes instead of the frequency shifts, it has been shown that this type of sensing devices has: 1) orders of magnitude higher sensitivity than conventional single DoF resonator sensors; 2) common mode rejection capabilities.This thesis introduces a novel structure, based on three weakly coupled resonators (i.e. a 3DoF system), in which the stiffness of the resonator in the middle is at least twice the value compared to the other two identical resonators. The device is intended for sensing a change in stiffness. With the 3DoF resonator sensing device, another order of magnitude improvement in the stiffness sensitivity could be demonstrated.In addition to the novel 3DoF coupled resonator structure, we have also investigated a few practical aspects of the coupled resonator sensing devices that have not been addressed in previous research. These aspects include the damping, dynamic range, nonlinearity and output metrics of the sensor. We have also found a trade-off between the sensitivity and the dynamic range. To solve this dilemma, a bias operation point has also been proposed. By using the bias operation point, it was shown in theory that the linearity of the sensors can also be improved.Finally, we have also theoretically estimated the vibrational amplitudes and phase delays of each individual resonators within the 3DoF system at the out-of-phase mode frequency. Furthermore, based on these estimations, we have proposed a feasible self oscillating loop structure, which has the capability of automatically locking to the out-of- phase mode frequency
Axisymmetric Solutions to a coupled Navier-Stokes/Allen-Cahn Equations
No full text1 online resource (PDF, 38 pages)Xu, Xiang; Zhao, Liyun; Liu, Chun. (2009). Axisymmetric Solutions to a coupled Navier-Stokes/Allen-Cahn Equations. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/180141
Jingguaeshna ZHENG & LI & ZHAO & ZHANG 2021, gen. nov.
No full textJingguaeshna Zheng & Zhang, gen. nov. Type species. Jingguaeshna taoae Zheng & Zhang, sp. nov. Etymology. Named after the combination of ‘ Jinggu ’ (the locality yielding the holotype) and Aeshna. Diagnosis. About twenty postnodal crossveins present before Pt; IR1 well-defined, originating several cells basad of Pt; RP2 curved; IR2 forked, branches separated by two rows of cells at level of Pt base; Rspl well defined, parallel with lower branch of IR2, separated by one row of cells; Mspl well defined, undulating, somewhat parallel with MA, separated by one row of cells; two rows of cells between MA and RP3/4 near posterior margin of wing; CuAa with at least four posterior branches.Published as part of ZHENG, DA-RAN, LI, SHA, ZHAO, YI-SHAN & ZHANG, HAI-CHUN, 2021, A potential telephlebiid dragonfly (Odonata: Anisoptera: Aeshnoidea) from Miocene of Yunnan, southwestern China, pp. 237-242 in Palaeoentomology 4 (3) on page 238, DOI: 10.11646/palaeoentomology.4.3.11, http://zenodo.org/record/550781
A new species of the genus Kuwanimyia Townsend (Diptera: Tachinidae) from Zhanjiang, China
No full textZhao, Zhe, Zhang, Chun-Tian, Chen, Xiao-Lin (2012): A new species of the genus Kuwanimyia Townsend (Diptera: Tachinidae) from Zhanjiang, China. Zootaxa 3238: 57-63, DOI: 10.5281/zenodo.28043
状位情感形容词与述位动词结构同现的原则
No full textAuthor name used this publication: 赵春利, Zhao Chun-liTitle in Traditional Chinese: 狀位情感形容詞與述位動詞結構同現的原則Journal title in Traditional Chinese: 漢語學習2010-2011 > Academic research: refereed > Publication in refereed journalVersion of RecordPublishedVoR allowe
Global Existence of Classical Solutions to the Typical Free Boundary Problem for General Quasilinear Hyperbolic Systems and its Applications
No full textLi, Ta-tsien (Li Da-qian); Zhao, Yan-Chun. (1989). Global Existence of Classical Solutions to the Typical Free Boundary Problem for General Quasilinear Hyperbolic Systems and its Applications. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/5074
Xun zhao xie zuo zhi di: "Kuludao" shang de li xiang shi ren Xiemosi Xini
No full textKwok, Chun Yi Jenny.Thesis M.Phil. Chinese University of Hong Kong 2015.Includes bibliographical references (leaves 83-90).Abstracts also in Chinese.Title from PDF title page (viewed on 03, November, 2016).Kwok, Chun Yi Jenny
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