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| 1 | Numerical and Experimental Investigations on Tunable Low-frequency Locally Resonant Metamaterials显示文摘In this paper,a tunable locally resonant metamaterial is proposed for low-frequency band gaps.The local resonator composed of two pairs of folded slender beams and a proof mass is designed based on the theory of compliant mechanism.The design optimization on geometric parameters is carried out to fulfil the quasi-zero-stiffness property.The locally resonant metamaterial is formed by periodically arranged unit cells,and the transmittance of longitudinal wave is studied through three aspects:numerical predictions,finite element simulations and experimental tests.The variation trends revealed by these three methods match well with one another:the band gap moves to lower frequency and both its depth and width get smaller and smaller with the increase of pre-compression(Δ).The band gap overlays the frequency range of 73.10–92.38 Hz and 16.78–19.49 Hz atΔ=0mm andΔ=10mm,respectively,providing a wide range of tunability.Besides,the ultralow-frequency band gap can be achieved asΔapproaches 10 mm.This study may provide an avenue for achieving the tunable ultralow-frequency locally resonant band gap. | Qida Lin Jiaxi Zhou Hongbin Pan Daolin Xu Guilin Wen | 2021 | Acta Mechanica Solida Sinica2021，34，5： | 4 |
| 2 | Renascence of Agricultural Heritage Tourism from the Ecological Perspective: A Case Study of Longxian Village in Qingtian County显示文摘Agricultural heritage ecotourism is a newly emerging tourism type, thus there is no too much referential experience for its development. The plight that Longxian Village is facing in its protection and development was discussed, specifically, the contradictions among residents, economy and society; based on ecological concepts, local social and economic development was elaborated from four perspectives of economic activities, lifestyles, human and nature, development concepts. Finally, suggestions were given to help Longxian Village out of the difficulty in its ecotourism development in terms of establishing multi-party participation, making ecotourism planning, designing reasonable tourist products and constructing a complete eco-industrial chain. | XIA Shengxue MA Qida ZHANG Jie XU Shanshan | 2013 | Journal of Landscape Research2013，5，4： | 2 |
| 3 | A Novel Edge Filter Demodulation Technique by Using High Birefringence Fiber Sagnac Loop Mirror显示文摘A novel way of edge filter demodulation for fiber Bragg grating sensor is put forward. A high birefringence fiber Sagnac loop mirror is used as edge filter to demodulate FBG sensor wavelength shift in range of about 8 nm. | Guang Zhou Qida Zhao Guiyun Kai Xiaoyi Dong Institute of Modern Optics, Nankai University, P.R.China, Tel: 86-22-23508770 | 2003 | 光学学报2003，23，S1： | 2 |
| 4 | Novel Bandwidth Sensor Based Fiber Grating显示文摘In this paper, the basic principle and the design method of the bandwidth sensing of fiber grating are expounded, respectively. Several novel bandwidth sensor based fiber grating are analyzed and discussed. | Xiaoyi Dong, Weigang Zhang, Guiyun Kai, Shuzhong Yuan, Qida ZhaoInstitute of Modern Optics, the key laboratory of Optoelectronic Information Technology Science, EMC, Nankai University, Tianjin, 300071, P. R. China | 2003 | 光学学报2003，23，S1： | 1 |
| 5 | Temperature-independent FBG pressure sensor with high sensitivity显示文摘 | Liu Lihui Zhang Hao Zhao Qida | | 0，，01： | 1 |
| 6 | Toward zero pancreatic leakage after pancreaticoduodenectomy for soft pancreas in low-volume pancreatic surgery centers 显示文摘 | Qida T Mimastu K Kawasaki A | 2009 | Hepatogastroenterology2009，56，91： | 1 |
| 7 | A smart bending sensor with a novel temperature and strain insensitive long-period grating显示文摘 | Chen Shaohua Tong Zhengrong Zhao Qida | 2004 | Sensors and Actuators A2004，116，1： | 1 |
| 8 | Temperature insensitive fiber Bragg grating liquid-level sensor based on bending cantilever beam显示文摘 | GUO Tuan ZHAO Qida DOU Qingying | 2005 | IEEE Photonics Technology Letters2005，17，11： | 1 |
| 9 | A Smart Bending Sensor with a Novel Temperature-and Strain-Insensitive Long-Period Grating显示文摘 | Chen Shaohua Tong Zhengrong Zhao Qida | 2004 | Sensors and Actuators A2004，116，： | 1 |
| 10 | Temperature-independent FBG pressure sensor with high sensitivity显示文摘 | Lihui Liu Hao Zhang Qida Zhao Yuliang Liu Fang Li | 2006 | Optical Fiber Technology2006，，1： | 1 |
| 11 | A smart bending sensor with a novel temperature - and strain- insensitive long - period grating显示文摘 | Shaohua Chen Zhengrong Tong Qida Zhao | 2004 | Sensors and actuators A2004，116，10： | 1 |
| 12 | Time/Wavelength Fiber Bragg Grating Multiplexing Sensor Array显示文摘A novel time/wavelength-multiplexed fiber Bragg grating sensor array is presented. This type of sensor array has the advantages of more points for multi-point measurement, simple structure and low cost. | Shiya He, Shuyang Hu, Qida Zhao, Kuanxin Yu, Jinfeng Zhou, Li Wang Science College, Beijing University of Technology, Beijing 100022, P.R. China | 2003 | 光学学报2003，23，S1： | 1 |
| 13 | A LPG sensing system for leak detection of oil storage tanks显示文摘 | Lihui Liu Qida Zhao Luming Zhao | 2010 | Proc of SPIE2010，，： | 1 |
| 14 | Theoretical research of multiple-channel all-fiber acousto-optical modulator of polarisation maintaining fiber显示文摘 | Liao Bangquan Zhao Qida Zhang Yimo | 2004 | Optics Communications2004，242，： | 1 |
| 15 | Two-dimensional multichannel aeousto-optic modulation and acousto-optic matrix-vector multiplication显示文摘 | Zhao Qida He Shiya Yu Kuanxin | 1996 | Proc SPIE1996，2897，： | 1 |
| 16 | FGFR-targeted gene delivery mediated by supramolecular assembly between b-cyclodextrincrosslinked PEI and redox-sensitive PEG显示文摘 | Yuan P Qida H Guping T | 2013 | Biomaterials2013，34，27： | 1 |
| 17 | A smart bending sensor with a novel temperature and strain-insensitive long-period grating显示文摘 | Chen Shaohua Tong zhengr0ng Zhao Qida | 2004 | Sensors and Actuators A Physical2004，116，1： | 1 |
| 18 | A LPG sensing system for leak detection of oil storage tanks 显示文摘 | Lihui Liu Qida Zhao Luming Zhao | 2010 | Proc of SPIE2010，71，57157： | 1 |
| 19 | Temperature-independent FBG pressure sensor with high sensitivity显示文摘 | Lihui Liu Hao Zhang Qida Zhao Yuliang Liu Fang Li | 2006 | Optical Fiber Technology2006，，1： | 1 |
| 20 | Back analysis of calculation parameters for Dashiban landslide at Three Gorges Reservoir on Yangtze River显示文摘 | GAO Dejun XU Weiya GUO Qida | 2006 | Journal of Hohai University: Natural Sciences2006，34，1： | 1 |
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