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| 1 | 0.04 degree-per-hour MEMS disk resonator gyroscope with high-quality factor (510 k) and long decaying time constant(74.9 s)显示文摘The disk resonator gyroscope is an attractive candidate for high-performance MEMS gyroscopes.This gyroscope consists of a sensor and readout electronics,and the characteristics of the sensor directly determine the performance.For the sensor,a high-quality factor and long decaying time constant are the most important characteristics required to achieve high performance.We report a disk resonator gyroscope with a measured quality factor of 510 k and decaying time constant of 74.9 s,which is a record for MEMS silicon disk resonator gyroscopes,to the best of our knowledge.To improve the quality factor of the DRG,the quality factor improvement mechanism is first analyzed,and based on this mechanism two stiffness-mass decoupled methods,i.e.,spoke length distribution optimization and lumped mass configuration design,are proposed and demonstrated.A disk resonator gyroscope prototype is fabricated based on these design strategies,and the sensor itself shows an angle random walk as low as 0.001°/√h,demonstrating true potential to achieve navigation-grade performance.The gyroscope with readout electronics shows an angle random walk of 0.01°/√h and a bias instability of 0.04°/h at room temperature without compensation,revealing that the performance of the gyroscope is severely limited by the readout electronics,which should be further improved.We expect that the quality factor improvement methods can be used in the design of other MEMS gyroscopes and that the newly designed DRG can be further improved to achieve navigation-grade performances for high-end industrial,transportation,aerospace,and automotive applications. | Qingsong Li Dingbang Xiao Xin Zhou Yi Xu Ming Zhuo Zhanqiang Hou Kaixuan He Yongmeng Zhang Xuezhong Wu | 2018 | Microsystems & Nanoengineering2018，4，1： | 16 |
| 2 | Origin of Paleofluids in Dabashan Foreland Thrust Belt:Geochemicai Evidence of ^(13)C,^(18)O and ^(87)Sr/^(86)Sr in Veins and Host Rocks显示文摘在最后十年里,在在山西和四川省,在形成和进化之间的关系,和烃累积之间的边界地方与从在 Dabashan 低岬消沉的油和煤气的探索的重要发现系上带子在,从盆和油和煤气的探索的观点的这条低岬戳带被学习了。同时,几乎在带以内的液体的起源上没有很少研究。包括在主机岩石和静脉中表示 13C, 18O 和 87Sr/86Sr 同位素上的咸度和研究的 Z 值基于 geochemical 系统分析,在低岬戳带的 paleofluids 的起源被考虑。有 paleofluid 的四种主要类型,包括深导出披风,沉积,混合并且大气。为深导出披风的液体, 13C 通常是不到 5.0PDB, 18O 不到 10.0PDB, Z 价值不到 110 并且 87Sr/86Sr 不到 0.70600;沉积液体主要是海洋的导出碳酸盐,与 13C 通常超过 2.0PDB, 18O 不到 10.0PDB, Z 价值超过 120 并且 87Sr/86Sr 从 0.70800 ~ 0.71000 ;混合液体主要由海洋的碳酸盐液体组成(可能包括有点导出披风的液体或大气的水) 与通常从 2.0 到 8.0PDB 的 13C,从 10.0 ~ 18.0 PDB,从 105 ~ 120 的 Z 价值和从 0.70800 ~ 0.71000 的 87Sr/86Sr 的 18O;大气的液体主要由大气的水组成,与通常从 0.0 到 10.0PDB 的 13C, 18O 不到 8.0%cPDB, Z 价值不到 110 并且 87Sr/86Sr 超过 0.71000。Chengkou 差错带包含最复杂的起源,包括 paleofluid 的所有四种类型;Zhenba 和 Pingba 差错带和稳定的区域包含主要沉积类型的简单 paleofluid;Jimingsi 差错带包含主要沉积、混合的液体,由沉积液体组成的两个和大气的水。低岬消沉带的侏罗记岩石包含主要大气的液体。 | ZENG Jianhui XU Tianwu SUN Zhanqiang ZHANG Yongwang | 2010 | Acta Geologica Sinica(English Edition)2010，84，5： | 2 |
| 3 | Hybrid bound states in the continuum in terahertz metasurfaces显示文摘Bound states in the continuum(BICs)have exhibited extraordinary properties in photonics for enhanced light-matter interactions that enable appealing applications in nonlinear optics,biosensors,and ultrafast optical switches.The most common strategy to apply BICs in a metasurface is by breaking symmetry of resonators in the uniform array that leaks the otherwise uncoupled mode to free space and exhibits an inverse quadratic relationship between quality factor(Q)and asymmetry.Here,we propose a scheme to further reduce scattering losses and improve the robustness of symmetry-protected BICs by decreasing the radiation density with a hybrid BIC lattice.We observe a significant increase of radiative Q in the hybrid lattice compared to the uniform lattice with a factor larger than 14.6.In the hybrid BIC lattice,modes are transferred toГpoint inherited from high symmetric X,Y,and M points in the Brillouin zone that reveal as multiple Fano resonances in the far field and would find applications in hyperspectral sensing.This work initiates a novel and generalized path toward reducing scattering losses and improving the robustness of BICs in terms of lattice engineering that would release the rigid requirements of fabrication accuracy and benefit applications of photonics and optoelectronic devices. | Junxing Fan Zuolong Li Zhanqiang Xue Hongyang Xing Dan Lu Guizhen Xu Jianqiang Gu Jiaguang Han Longqing Cong | 2023 | Opto-Electronic Science2023，2，4： | 1 |
| 4 | Design of cooling water scheme of gas compressing station in west-to-east gas pipeline 显示文摘 | Li Hongtao Xu Zhanqiang Zhu Benrui | 2014 | Applied Mechanics and Materials2014，577，： | 1 |
| 5 | Recent Advances and Perspective of Photonic Bound States in the Continuum显示文摘Recent advancements in photonic bound states in the continuum(BICs)have opened up exciting new possibilities for the design of optoelectronic devices with improved performance.In this perspective article,we provide an overview of recent progress in photonic BICs based on metamaterials and photonic crystals,focusing on both the underlying physics and their practical applications.The first part of this article introduces 2 different interpretations of BICs,based on far-field interference of multipoles and near-field analysis of topological charges.We then discuss recent research on manipulating the far-field radiation properties of BICs through engineering topological charges.The second part of the article summarizes recent developments in the applications of BICs,including chiral light and vortex beam generation,nonlinear optical frequency conversion,sensors,and nanolasers.Finally,we conclude with a discussion of the potential of photonic BICs to advance terahertz applications in areas such as generation and detection,modulation,sensing,and isolation.Webelieve that continued researchinthis area will lead to exciting new advancements in optoelectronics,particularly in the field of terahertz devices. | Guizhen Xu Hongyang Xing Zhanqiang Xue Dan Lu Jinying Fan Junxing Fan Perry Ping Shum Longqing Cong | 2023 | Ultrafast Science2023，3，5： | 0 |
| 6 | Machinability of Hastelloy C-276 Using Hot-pressed Sintered Ti(C_7N_3)-based Cermet Cutting Tools显示文摘C-276 nickel-based alloy is a difficult-to-cut material. In high-speed machining of Hastelloy C-276, notching is a prominent failure mode due to high mechanical properties of work piece, which results in the short tool life and low productivity. In this paper, a newly developed Ti(C7N3)-based cermet insert manufactured by a hot-pressing method is used to machine the C-276 nickel-based alloy, and its cutting performances are studied. Based on orthogonal experiment method, the influence of cutting parameters on tool life, material removal rates and surface roughness are investigated. Experimental research results indicate that the optimal cutting condition is a cutting speed of 50 m/min, depth of cut of 0.4 mm and feed rate of 0.15 mm/r if the tool life and material removal rates are considered comprehensively. In this case, the tool life is 32 min and material removal rates are 3000 mm3/min, which is appropriate to the rough machining. If the tool life and surface roughness are considered, the better cutting condition is a cutting speed of 75 m/min, depth of cut of 0.6 mm and feed rate of 0.1 mm/r. In this case, the surface roughness is 0.59μm. Notch wear, flank wear, chipping at the tool nose, built-up edge(BUE) and micro-cracks are found when Ti(C7N3)-based cermet insert turned Hastelloy C-276. Oxidation, adhesive, abrasive and diffusion are the wear mechanisms, which can be investigated by the observations of scanning electron microscope and energy-dispersive spectroscopy. This research will help to guide studies on the evaluation of machining parameters to further advance the productivity of nickel based alloy Hastelloy C-276 machining. | XU Kaitao ZOU Bin HUANG Chuanzhen YAO Yang ZHOU Huijun LIU Zhanqiang | 2015 | Chinese Journal of Mechanical Engineering2015，28，3： | 0 |
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