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Transmission Characteristics in a Coupled-Resonator Waveguide Interacting with a Two-Mode Nanocavity Containing a Three-Level Emitter

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Chinese Physics Letters 2012年第5期29卷 136-139页

作者： CHENG mu-tian SONG Yan-Yan YU Long-Bao School of Electrical Engineering&Information Anhui University of TechnologyMaanshan 243002 School of Electronic and Information Engineering Hefei Normal UniversityHefei 230061

The photon transport in a coupled-resonator waveguide coupled to a two-mode nanocavity embedded with a three-level emitter is *** transmission and reflection amplitudes are obtained by using the discrete coordinates *** show that the coherent transport properties of a single photon can be well controlled by detuning the coupling strength between the two-mode nanocavity and the emitter,and the coupling strength between the nanocavity and the coupled-resonator waveguide. These results may be useful for the design of photonic devices such as optical filters.

关键词： coupling coordinates coherent

Use of Deep Learning for Continuous Prediction of Mortality for All Admissions in Intensive Care Units

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Tsinghua Science and Technology 2023年第4期28卷 639-648页

作者： Guangjian Zeng Jinhu Zhuang Haofan Huang mu tian Yi Gao Yong Liu Xiaxia Yu School of Biomedical Engineering Health Science CenterShenzhen UniversityShenzhen 518060China Shenzhen Hospital Southern Medical UniversityShenzhen 518060China

The mortality rate in the intensive care unit(ICU)is a key metric of hospital clinical *** enhance hospital performance,many methods have been proposed for the stratification of patients’different risk categories,such as severity scoring systems and machine learning ***,these methods make capturing time sequence information difficult,posing challenges to the continuous assessment of a patient’s severity during their hospital ***,we built a predictive model that can make predictions throughout the patient’s stay and obtain the patient’s risk of death in real *** proposed model performed much better than other machine learning methods,including logistic regression,random forest,and XGBoost,in a full set of performance evaluation ***,the proposed model can support physicians’decisions by allowing them to pay more attention to high-risk patients and anticipate potential complications to reduce ICU mortality.

关键词： deep learning representation learning mortality risk prediction critical care

Etching-assisted femtosecond laser microfabrication

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Chinese Physics B 2018年第9期27卷 56-62页

作者： Monan Liu mu-tian Li Han Yang Hong-Bo Sun Department of Condensed Matter College of PhysicsJilin UniversityChangchun 130012China State Key Laboratory on Integrated Optoelectronics College of Electronic Science and EngineeringJilin UniversityChangchun 130012China

Although femtosecond laser microfabrication is one of the most promising three-dimensional（3D） fabrication techniques, it could suffer from low fabrication efficiency for structures with high 3D complexities. By using etching as a main assistant technique, the processing can be speeded up and an improved structure surface quality can be provided. However,the assistance of a single technique cannot satisfy the increasing demands of fabrication and integration of highly functional 3D microstructures. Therefore, a multi-technique-based 3D microfabrication method is required. In this paper, we briefly review the recent development on etching-assisted femtosecond laser microfabrication（EAFLM）. Various processing approaches have been proposed to further strengthen the flexibilities of the EAFLM. With the use of the multi-technique-based microfabrication method, 3D microstructure arrays can be rapidly defined on planar or curved surfaces with high structure qualities.

关键词： femtosecond laser microfabrication microlens array etching

An Experimental Study on the Conductivity Changes in Coal during Methane Adsorption-Desorption and their Influencing Factors

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Acta Geologica Sinica(English Edition) 2019年第3期93卷 704-717页

作者： CHEN Yue MA Dongmin GUO Chen YANG Fu mu tian GAO Zheng College of Geology and Environment Xi'an University of Science and TechnologyXi'an 710054ShaanxiChina Key Laboratory of Coal Resources Exploration and Comprehensive Utilization Ministry of Land and ResourcesXi'an 710021ShaanxiChina Post-doctorate R&D Base of Geological Resources and Geological Engineering Xi'an University of Science and TechnologyXi'an 710054ShaanxiChina Geological Research Institute for Coal Green Mining Xi'an University of Science and TechnologyXi'an 710054ShaanxiChina

During the processes of methane adsorption and desorption,the internal structure of coal changes,accordingly leading to changes in electrical *** this paper,using low rank coal seams of the Yan'an Formation in the Dafbsi field as the research subject,the relationship between coal resistivity,methane adsorption quantity,and equilibrium pressure is analyzed through proximate analysis,mercury injection tests,low temperature liquid nitrogen adsorption tests,and coal resistivity measurements during methane adsorption and *** results show that during the process of pressure rise and methane adsorption,the conductivity of coal increases,resulting from heat release from methane adsorption,coal matrix swelling and adsorbed water molecules replaced by methane,but the resistivity reduction gradually *** relationship between coal resistivity and methane adsorption quantity and equilibrium pressure can be described by a quadratic *** the processes of depressurization and desorption,the resistivity of coal rebounds slightly,due to decalescence of methane desorption,coal matrix shrinkage and water-gas displacement,and the relationship coincides with a linear *** adsorption leads to irreversible changes in coal internal structure and enhances the coal conductivity,and resistivity can not be restored to the initial level even after methane *** resistivity and reduction rate of durain are higher than those of vitrain,with relatively greater homogeneous pore throat structure and fewer charged particles in the double electric *** addition,moisture can enhance the conductivity of coal and makes it change more complexly during methane adsorption and desorption.

关键词： coal reservoir adsorption-desorption electric resistivity lithotype moisture

Single-Photon Scattering by a Three-level System Interacting with a Whispering-Gallery Resonator Coupled to One-Dimensional Waveguide：

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Communications in Theoretical Physics 2011年第3期55卷 501-505页

作者： CHENG mu-tian SONG Yan-Yan LUO Ya-Qin ZHAO Guang-Xing School of Electrical Engineering ＆ Information Anhui University of Technology Maanshan 243002 China

We investigate theoretically the single-photon scattering by a A-type three-level system interacting with a whispering-gallery-type resonator which is coupled to a one-dimensional waveguide by full quantum-mechanical approach. The single-photon transmission amplitude and reflection amplitude are obtained exactly via real-space approach. The single-photon transport properties controlling by classic optical field are discussed. The critical coupling condition in the coupled waveguide-whispering-gallery resonator-atom with three-level system is also analyzed.

关键词： one-dimensional waveguide whispering gallery resonator scattering single photon A-type threelevel

Structural motion of water-resisting key strata lying on overburden

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Journal of China University of Mining and Technology 2008年第3期18卷 353-357页

作者： PU Hai MIAO Xie-xing YAO Bang-hua tian mu-jun School of Sciences China University of Mining ＆ Technology Xuzhou Jiangsu 221116 China State Key Laboratory for Geomechanics ＆ Deep Underground Engineering China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China

Water-preserved mining is one of the important parts of the ‘Green Mining’ technological system. The purpose of wa-ter-preserved mining is to prevent water from bursting out in coal mines and thus to protect water resources. The principle of wa-ter-resisting key strata (WKS) is proposed to establish a model capable of guiding and developing water-preserved mining technol-ogy. The experimental model of the WKS is constructed following requirements of the Data Image Correlative Method (DICM). Five experimental schemes are designed according to different combined patterns of the WKS. The water-resisting performance of the WKS is analyzed from observation of structural stability. All of them provide referential value for water-preserved mining.

关键词： water-preserved mining water-resisting key strata (WKS) digital image correlative method (DICM) water-inrush in coal mine

Optimizing SSR-PCR system of Panax ginseng by orthogonal design

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Journal of Forestry Research 2007年第1期18卷 31-34页

作者： YANG tian-tian mu Li-qiang WANG Jun School of Forestry of Northeast Forestry University Harbin 150040 P. R. China

An orthogonal design was used to optimize SSR-PCR amplification system using Panax ginseng genomic DNA as template. Four levels of five factors （DNA template, Taq DNA polymerase, Mg^2＋, primer, and dNTP） and annealing temperature have been tested separately in this system. The results demonstrated the reaction efficiency was affected by these factors. Based on the results, a stable, productive and reproducible PCR system and cycling program for amplifying a ginseng SSR locus were obtained： 20 μL system containing 1.0 U Taq DNA polymerase, 2.0 mmol·L^-1 Mg^2＋, 0.2 mmol·L^-1 dNTPs, 0.3 μmol·L^-1 SSR primer, 60 ng· μla^-1 DNA template, performed with a program of 94℃ for 5 min, 94℃ for 30 s, annealing at 56.3℃ for 30 s, 72℃ for 1 min, 37 cycles, finishing at 72℃ for 7 min, and storing at 4℃.

关键词： Panax ginseng C.A.Meyer Orthogonal design SSR-PCR

Single-Photon Transmission Characteristics in a Pair of Coupled-Resonator Waveguides Linked by a Nanocavity Containing a Quantum Emitter

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Chinese Physics Letters 2013年第5期30卷 56-58页

作者： CHENG mu-tian DING Meng-Ting SONG Yan-Yan LUO Ya-Qin School of Electrical Engineering&Information Anhui University of TechnologyMaanshan 243002

Single-photon scattering in a pair of coupled-resonator arrays of waveguides linked by a nanocavity embedded with a two-level system is investigated *** using the discrete coordinates approach,we deduce the analytical expressions for the transmission and reflection *** calculations reveal that the transport properties of the single photon can be controlled by adjusting the coupled strength between the nanocavity and the coupled-resonator *** switching and a 1/4 beam splitter for the band-edge photon based on this structure are also discussed.

关键词： resonator scattering cavity

Optical Bloch Equations Modified with Phonon-Induced Intensity-Dependent Dephasing

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Communications in Theoretical Physics 2007年第2X期48卷 335-338页

作者： ZHOU Guang-Hua LI Yao-Yi CHENG mu-tian LIU Shao-Ding WANG Qu-Quan Department of Physics Wuhan University Wuhan 430072 China State Key Laboratory for Surface Physics Institute of Physicsthe Chinese Academy of Sciences Beijing 100080 China

We extend the exciton population equations of a two-level quantum dot system with weak excitation to the ones with strong excitations, in which, the phonon-induced intensity-dependent dephasing time and decay rate are involved. The straightforward calculated populations from the modified population equations demonstrate the damping behavior of Rabi oscillation as the external field increasing. The effect of the intensity-dependent dephasing time and the intensity-dependent decay rate are also discussed.

关键词： decoherence dephasing optical Bloch equation quantum dot