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Flattening Spectrum of a Broadband and Wavelength Stable Erbium Doped Superfluorescent Fiber Source

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Chinese Physics Letters 1999年第5期16卷 356-357页

作者： YANG Bao ming hai GUO Yang XIE Jian-ping Department of Physics University of Science and Technology of ChinaHefei 230026

A technique is used to design the spectra in erbium doped superfluorescent fiber source experimentally and *** an erbium doped fiber with a 10m length and 300ppm concentration,a line width of about 42nm and high mean wavelength stability(<***/K,<0.2ppm/mW)were obtained by means of a suitable population distribution,and adjusting the ratio of backward to forward pump ***,its thermal characteristic is *** results will improve the performance of fiber optical gyroscope and fiber sensors,and will be applied in erbium doped fiber amplifier with flattening gain.

关键词： fiber amplifier Erbium

Inactivated Sendai Virus Induces ROS-dependent Apoptosis and Autophagy in Human Prostate Cancer Cells

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Biomedical and Environmental Sciences 2018年第4期31卷 280-289页

作者： QIAN Miao TAN hai ming YU Ning WANG Tao ZHANG Quan Institute of Comparative Medicine College of Veterinary Medicine Yangzhou University Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses Yangzhou University

Objective The current study aims to investigate the effect of Hemagglutinating virus of Japan envelope（HVJ-E） on induction of apoptosis and autophagy in human prostate cancer PC3 cells, and the underlying mechanisms. Methods PC3 cells were treated with HVJ-E at various multiplicity of infection（MOI）, and the generated reactive oxygen species（ROS）, cell viability, apoptosis, and autophagy were detected, respectively. Next, the role of ROS played in the regulation of HVJ-E-induced apoptosis and autuphagy in PC3 cells were analysed. In the end, the relationship between HVJ-E-induced apoptosis and autuophagy was investigated by using rapamycin and chloroquine. Results Flow cytometry assay revealed that HVJ-E treatment induced dose-dependent apoptosis and that the JNK and p38 MAPK signaling pathways were involved in HVJ-E-induced apoptosis in PC3 cells. In addition, HVJ-E was able to induce autophagy in PC3 cells via the class III PI3 K/beclin-1 pathway. The data also implyed that HVJ-E-triggered autophagy and apoptosis were ROS dependent. When ROS was blocked with N-acetylcysteine（NAC）, HVJ-E-induced LC3-II conversion and apoptosis were reversed. Interestingly, HVJ-E-induced apoptosis was significantly increased by an inducer of autophagy, rapamycin pretreatment, both in vitro and in vivo. Conclusion HVJ-E exerts anticancer effects via autophagic cell death in prostate cancer cells.

关键词： Inactivated Sendai virus(HVJ-E) Reactive oxygen species(ROS) Apoptosis Autophagy

Fermi/LAT observations of lobe-dominant radio galaxy 3C 207 and possible radiation region of γ-rays

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Research in Astronomy and Astrophysics 2018年第6期18卷 93-98页

作者： Sheng-Chu Guo hai-ming Zhang Jin Zhang En-Wei Liang Guangxi Key Laboratory for Relativistic Astrophysics Department of Physics Guangxi University Key Laboratory of Space Astronomy and Technology National Astronomical Observatories Chinese Academy of Sciences

3 C 207 is a lobe-dominant radio galaxy with a one sided jet and bright knots, spanning a kpcMpc scale, which have been resolved in the radio, optical and X-ray bands. This target was confirmed as a γ-ray emitter with Fermi/LAT, but it is uncertain whether the γ-ray emission region is the core or knots due to the low spatial resolution of Fermi/LAT. We present an analysis of its Fermi/LAT data acquired during the past 9 years. Different from the radio and optical emission from the core, it is found that theγ-ray emission is steady without detection of flux variation at over a 2σ confidence level. This likely implies that the γ-ray emission is from its knots. We collect the radio, optical and X-ray data of knot-A,the closest knot from the core at 1.4′′, and compile its spectral energy distribution(SED). Although the single-zone synchrotron+SSC+IC/CMB model that assumes knot-A is at rest can reproduce the SED in the radio-optical-X-ray band, the predicted γ-ray flux is lower than the LAT observations and the derived magnetic field strength deviates from the equipartition condition by 3 orders of magnitude. Assuming that knot-A is moving relativistically, its SED from radio to γ-ray bands would be represented well with the single-zone synchrotron+SSC+IC/CMB model under the equipartition condition. These results likely suggest that the γ-ray emission may be from knot-A via the IC/CMB process and the knot should have relativistical motion. The jet power derived from our model parameters is also roughly consistent with the kinetic power estimated with radio data.

关键词： galaxies: active galaxies: jets radiation mechanisms: non-thermal galaxies: individual(3C 207)

All-dielectric bowtie waveguide with deep subwavelength mode confinement

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Frontiers of physics 2018年第4期13卷 229-235页

作者： Wen-Cheng Yue Pei-Jun Yao Li-Xin Xu hai ming Department of Optics and Optical Engineering University of Science and Technology of China Hefei 230026 China

Plasmonic waveguides and conventional dielectric waveguides have favorable characteristics in photonic integrated circuits. Typically, plasmonic waveguides can provide subwavelength mode confinement, as shown by their small mode area, whereas conventional dielectric waveguides guide light with low loss, as shown by their long propagation length. However, the simultaneous achievement of subwavelength mode confinement and low-loss propagation remains limited. In this paper, we propose a novel design of an all- dielectric bowtie waveguide, which simultaneously exhibits both subwavelength mode confinement and theoretically lossless propagation. Contrary to traditional dielectric waveguides, where the guidance of light is based on total internal reflection, the principle of the all-dielectric bowtie waveguide is based on the combined use of the conservation of the normal component of the electric displacement and the tangential component of the electric field, such that it can achieve a mode area comparable to its plasmonic counterparts. The mode distribution in the all-dielectric bowtie waveguide can be precisely controlled by manipulating the geometric design. Our work shows that it is possible to achieve extreme light confinement by using dielectric instead of lossy metals.

关键词： dielectric waveguide nanophotonics plasmonics photonic integrated circuits silicon

Synthesis and Three-photon Induced Nonlinear Properties of a Novel Organic Chromophore

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Chinese Chemical Letters 2005年第8期16卷 1093-1096页

作者： Fu Quan GUO Jun YANG Qi Jin ZHANG hai ming StructureResearch Laboratory University of Science and Technology of China Hefei 230026 Department of Polymer Science and Engineering University of Science and Technology of China Hefei 230026 Department of Physics University-of Science and Technology of China Hefei 230026

A novel organic chromophore 4, 4＇-bis（9-carbazyl-trans-styryl）-biphenyl （BCSBP） has been synthesized and characterized by IHNMR and elemental analysis. Three-photon absorption（3PA） induced upconvention fluorescence was observed and large 3PA cross section as high as 10^-74 cm^6 s^2 was obtained for nanosecond laser pulses at 1064 nm from optical limiting measurements.

关键词： Carbazole three-photon absorption upconvention fluorescence optical limiting.

Lobe-dominatedγ-Ray Emission of Compact Symmetric Objects

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Research in Astronomy and Astrophysics 2024年第2期24卷 196-205页

作者： Ying-Ying Gan hai-ming Zhang Xing Yang Ying Gu Jin Zhang School of Physics Beijing Institute of TechnologyBeijing 100081China School of Astronomy and Space Science Nanjing UniversityNanjing 210023China Guangxi Key Laboratory for Relativistic Astrophysics School of Physical Science and TechnologyGuangxi UniversityNanning 530004China

Theγ-ray emitting compact symmetric objects(CSOs)PKS 1718-649,NGC 3894,and TXS 0128+554 are lobedominated in the radio *** order to investigate theirγ-ray radiation properties,we analyze the~14yr Fermi/LAT observation data of the three *** all show the low luminosity(1041-1043 erg s-1)and no significant variability in theγ-ray ***γ-ray average spectra can be well fitted by a power-law *** properties ofγ-rays are clearly different from theγ-ray emitting CSOs CTD 135 and PKS 1413+135,for which theγ-rays are produced by a restarted aligned *** the L_(γ)-Γ_(γ)plane,the three CSOs are also located at the region occupied by radio galaxies(RGs)while CTD 135 and PKS 1413+135 display a similar feature to *** with a similar radio emission property toγ-ray emitting RGs Cen A and Fornax A,we speculate that theγ-rays of the three CSOs stem from their extended *** broadband spectral energy distributions of the three CSOs can be well explained by the two-zone leptonic model,where theirγ-rays are produced by the inverse Compton process of the relativistic electrons in extended *** extrapolating the observed Fermi/LAT spectra to the very high energy band,we find that TXS 0128+554 among the three CSOs may be detected by the Cherenkov Telescope Array in the future.

关键词： galaxies active-galaxies jets-radio continuum galaxies-gamma-rays galaxies

Scheduling a Fuzzy Flowshop Problem to Minimize Weighted Earliness-tardiness

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Scheduling a Fuzzy Flowshop Problem to Minimize Weighted Ear...

A sparse representation method for image-based surface defect detection

第25届中国控制与决策会议

作者： Ping Yan ming-hai Jiao Li-qiang Zhao School of Economics and Management Shenyang Aerospace University Computing Center Northeastern University

ISBN: (纸本)9781467355339

The flowshop scheduling problem with fuzzy processing times is concerned in this paper. A triangular fuzzy number is used to represent the uncertainty processing times of jobs. The due windows have been assigned to all jobs. If a job is completed within its due window, then it incurs no scheduling cost. Otherwise, an earliness or tardiness cost is incurred. The objective is to find a job schedule such that the weighted sum of earliness and tardiness penalties of jobs is minimized. Schedules are generated by a proposed hybrid algorithm in the context of quantum evolutionary algorithm and particle swarm optimization approach. Three novel coding schemes are designed for transforming an individual into a sequence of jobs. Furthermore, a velocity disturbance strategy is also introduced into the proposed algorithm to improve the diversity of the swarm. The simulation results show that the proposed algorithm is able to obtain higher quality solutions stably and efficiently in the fuzzy flowshop scheduling problem.

关键词： Flowshop scheduling Fuzzy processing time Particle swarm optimization Quantum evolutionary algorithm

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Optoelectronics Letters 2018年第6期14卷 476-480页

作者： YAO ming-hai GU Qin-long College of Information Engineering Zhejiang University of Technology

In this paper, an efficient sparse representation-based method is presented for detecting surface defects. The proposed method uses the sparse degree of coefficient in the redundant dictionary for checking whether the test image is defective or not, and the binary representation of the defective images is obtained, according to the global coefficient feature. Owing to the requirements for the efficiency and detecting quality, the block proximal gradient operator is introduced to speed up the online dictionary learning. Considering the correlation among the testing samples, prior knowledge is applied in the orthogonal-matching-pursuit sparse representation algorithm to improve the speed of sparse coding. Experimental results demonstrate that the proposed detection method can effectively detect and extract the defects of the surface images, and has broad applicability.

关键词： surface defect detection A sparse representation method image-based

Spectroscopic Properties and Three-photon Absorption Induced Optical Limiting of Series of Novel Nonlinear Chromophores

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Chinese Journal of Chemical Physics 2008年第3期21卷 227-232页

作者： Fu-quan Guo Xiao-lao Sun Hao Liang Zhi-yuan Hu Qi-jin Zhang hai ming Department of Materials Engineering Luoyang Institute of Science and Technology Luoyang 471023 China Department of Chemical Engineering Huizhou University Guangdong 516007 China Department of Polymer Science and Engineering University of Science and Technology of China Hefei 230026 China Department of Physics University of Science and Technology of China Hefei 230026 China

Three novel nonlinear chromophores with symmetric D-π-D molecular structure and extended conjugated length were synthesized. Solvatochromism analysis shows great symmetric intramolecular charge transfer occurring in chromophores by the enhancement in the dipole moment between the ground and excited states. The properties of optical power limiting induced by three-photon absorption （3PA） are demonstrated. Large 3PA coefficients and the corresponding molecular cross sections as high as 10^-74 cm^6s^2 were obtained for nanosecond laser pulses at 1.06μm from nonlinear transmission measurements.

关键词： Nonlinear chromophores Solvatochromism Three-photon absorption Optical limiting