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Simplified creation of polyester fabric supported Fe-based MOFs by an industrialized dyeing process: Conditions optimization, photocatalytics activity and polyvinyl alcohol removal

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Journal of Environmental Sciences 2022年第6期34卷 52-67页

作者： Liran Bian Yongchun Dong biao Jiang Division of Textile Chemistry and Environmental Care School of Textile Science and EngineeringTiangong UniversityTianjin 300387China Key Laboratory of Advanced Textile Composite of Ministry of Education Tiangong UniversityTianjin 300387China

MIL-53(Fe) was successfully prepared and deposited on the surface carboxylated polyester(PET) fiber by an optimized conventional solvothermal or industrialized high temperature pressure exhaustion(HTPE) process to develop a PET fiber supported MIL-53(Fe) photocatalyst(MIL-Fe@PET) for the degradation of polyvinyl alcohol(PVA) in water under light emitting diode(LED) visible irradiation. On the basis of several characterizations, MIL-Fe@PET was tested for the photocalytic ability and degradation mechanism. It was found that temperature elevation significantly enhanced the formation and deposition of MIL-53(Fe) with better photocatalytic activity. However, higher temperature than 130℃ was not in favor of its photocatalytic activity. Increasing the number of surface carboxyl groups of the modified PET fiber could cause a liner improvement in MIL-53(Fe) loading content and photocatalytic ability. High visible irradiation intensity also dramatically increased photocatalytic ability and PVA degradation efficiency of MIL-Fe@PET. Na_(2)S_(2)O_(8) was used to replace H_(2)O_(2) as electron acceptor for further promoting PVA degradation in this system. MIL-Fe@PET prepared by HTPE process showed higher MIL-53(Fe) loading content and slightly lower PVA degradation efficiency than that prepared by solvothermal process at the same conditions. These findings provided a practical strategy for the large-scale production of the supported MIL-53(Fe) as a photocatalyst in the future.

关键词： MIL-53(Fe) Polyester fabric Exhaustion dyeing Visible light photocatalyst Polyvinyl alcohol removal

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Riemann-Hilbert approach and soliton solutions for the Lakshmanan-Porsezian-Daniel equation with nonzero boundary conditions

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Communications in Theoretical Physics 2024年第11期76卷 20-32页

作者： Yilin Wang biao Li School of Mathematics and Statistics Ningbo UniversityNingbo 315211China

We construct the Riemann-Hilbert problem of the Lakshmanan-Porsezian-Daniel equation with nonzero boundary conditions,and use the Laurent expansion and Taylor series expansion to obtain the exact formulas of the soliton solutions in the case of a higher-order pole and multiple higher-order *** dynamic behaviors of a simple pole,a second-order pole and a simple pole plus a second-order pole are demonstrated.

关键词： Lakshmanan-Porsezian-Daniel equation Riemann-Hilbert problem nonzero boundary conditions multiple higher-order poles

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Survival and proliferation of the lysogenic bacteriophage CTXΦ in Vibrio cholerae

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Virologica Sinica 2015年第1期30卷 19-25页

作者： Fenxia Fan biao Kan State Key Laboratory for Infectious Disease Prevention and Control National Institute for Communicable Disease Control and Prevention Chinese Center for Disease Control and Prevention

The lysogenic phage CTXΦ of Vibrio cholerae can transfer the cholera toxin gene both horizontally(inter-strain) and vertically(cell proliferation). Due to its diversity in form and species, the complexity of regulatory mechanisms, and the important role of the infection mechanism in the production of new virulent strains of ***, the study of the lysogenic phage CTXΦ has attracted much attention. Based on the progress of current research, the genomic features and their arrangement, the host-dependent regulatory mechanisms of CTXΦ phage survival, proliferation and propagation were reviewed to further understand the phage's role in the evolutionary and epidemiological mechanisms of V. cholerae.

关键词： Vibrio cholerae lysogenic bacteriophage CTXΦ regulation evolution

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Extension of continuous scanning laser Doppler vibrometry measurement for complex structures with curved surfaces

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Chinese Journal of Aeronautics 2020年第12期33卷 3220-3227页

作者： Cuihong LIU Chaoping ZANG biao ZHOU Aero-engine Thermal Environment and Structure Key Laboratory of Ministry of Industry and Information Technology Nanjing University of Aeronautics and AstronauticsNanjing 210016China

The continuous Scanning Laser Doppler Vibrometry(SLDV)developed on the base of the galvanometer scanner system has made it possible to quickly obtain the full field vibration responses within a rectangular area of the *** this paper,an arbitrary continuous scanning path generating method for Continuous Scanning Laser Doppler Vibometry(CSLDV)is further put forward in order to allow the CSLDV suitable for testing structures featured by complex shapes not just for regular *** the first step,the relationship between position of laser spot and the driving voltages of galvanometer scanner system has been described by a mathematical ***,a novel arbitrary scanning path generating strategy based on CSLDV is presented by deforming a normalization rectangular scanning path to an arbitrary continuous scanning *** mapping relation between the normalization rectangular scanning path and arbitrary continuous scanning path is established using the reference *** the second step,a compressor blade with curved surface was taken as an example for modal test using the proposed *** the same time,a validated experiment was performed in *** results show the mode shapes derived from the extended CSLDV are in agreement with those from SLDV and the Modal Assurance Criterion(MAC)between the two are all greater than *** also demonstrate the feasibility and effectiveness of the proposed method for CSLDV test and show strong potential on further practical engineering applications.

关键词： Arbitrary scanning path Continuous Scanning Laser Doppler Vibometry(CSLDV) Fitted polynomial Galvanometer scanner system Rectangular scanning path

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Study on Effectiveness of Solitary-Wave-Like Form Based on Overtopping Data from Irregular Wave Tests

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China Ocean Engineering 2024年第4期38卷 701-710页

作者： LI Xiao-liang Huang Gui-biao School of Naval Architecture&Ocean Engineering Jiangsu University of Science and TechnologyZhenjiang 212100China

The previous study conducted by Li(2022)demonstrates that the Goda graph can be adequately represented by a solitary-wave-like form across the entire range of relative water depth,with the exception of the extremely shallow ***,it remains uncertain whether this form is equally effective when applied to test data generated by irregular waves,as the Goda graph was initially developed based on overtopping data from regular wave ***,it is unclear whether this form is suitable for formulating overtopping discharge at composite vertical *** order to address these questions,a 2D overtopping experiment was conducted,incorporating both simple and composite types of vertical walls,with various relative water depths across the entire range,excluding the extremely shallow zone.A novel analysis procedure was developed,which proved to be highly productive and can be considered a general method for data ***,the study yielded two conclusions:(1)the solitary-wave-like form is remarkably effective in formulating overtopping test data generated by irregular waves,regardless of whether the vertical wall is simple or composite,and(2)the resulting formulas exhibit definitely better performance compared with existing formulas.

关键词： solitary-wave-like form overtopping discharge overtopping formula vertical wall

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基于ADAMS的底卸式矿车转向架模态仿真分析研究

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煤矿机械 2025年第1期46卷 83-85页

作者：张彪王晓侃河南省工业和信息化技师学院郑州451199 河南机电职业学院郑州451191

转向架为矿用自卸车的重要组成部分,用来改变或恢复其行驶方向。为提升转向架的静强度、疲劳强度、可靠性等性能,使用SolidWorks软件建立底卸式矿车转向架三维实体模型,然后将三维实体模型导入ADAMS软件中的Vibration模块计算得到底卸... 详细信息

转向架为矿用自卸车的重要组成部分,用来改变或恢复其行驶方向。为提升转向架的静强度、疲劳强度、可靠性等性能,使用SolidWorks软件建立底卸式矿车转向架三维实体模型,然后将三维实体模型导入ADAMS软件中的Vibration模块计算得到底卸式矿车转向架前19阶固有频率。仿真分析表明,转向架振动频率从2.098 Hz开始到2.3478 Hz之间形成一个阶段性的振动波峰并发生共振现象,接着转向架振动逐渐趋向于和缓。直至在8.3418 Hz形成相比于前一个更大的振动波峰,再次发生共振现象,之后转向架振动逐渐趋向于和缓。该结果为后续转向架结构优化、平顺性研究及改进设计提供了理论参考。

关键词：矿车转向架模态分析激励共振

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Spectral cutoffs of Fermi-LAT GRBs 080916C and 090926A

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Research in Astronomy and Astrophysics 2012年第11期12卷 1519-1525页

作者： biao Li Zhuo Li Department of Astronomy/Kavli Institute for Astronomy and Astrophysics Peking UniversityBeijing 100871China Key Laboratory for the Structure and Evolution of Celestial Objects Chinese Academy ofSciencesKunming 650011China

It is expected that there should be a spectral cutoff at the high energy end of emission from a prompt gamma-ray burst （GRB）, due to, e.g. γγ absorption and/or a high energy cutoff in the electron distribution. We analyze the spectral data of Fermi- LAT detected GRBs 080916C and 090926A, aiming at locating the spectral cutoff. By assuming that the prompt GRB spectrum at the high energy end is a power law with an exponential cutoff, our analysis finds that the cutoff energy Ecutoff depends on the photon index/3 and the cutoff occurs at very high energy, Ecutoff = 161＋533 GeV in GRB 080916C and Ecutoff ≥ 100 GeV （forβ ≈-2.3） in GRB 090926A. Such high energy photons, if they exist, may disfavor the synchrotron origin and need alternative generation mechanisms.

关键词： gamma-rays: bursts -- acceleration of particles

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Low-dimensional cobalt doped carbon composite towards wideband electromagnetic dissipation

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Nano Research 2023年第1期16卷 70-79页

作者： Xiaodi Zhou biao Zhao Hualiang Lv School of Microelectronics Fudan UniversityShanghai 200433China Willian G.Lowrie Department of Chemical and Biomolecular Engineering The Ohio State UniversityColumbusOH 43210USA

Composites composed of a carbon matrix decorated with a metal or metal oxide derived from zeolitic imidazolate frameworks(ZIFs)have been widely applied as suitable electromagnetic wave absorbers due to their high porosity and controllable ***,achieving ideal absorption performance remains a challenge owing to the inadequate conductivity and high density of the metal ***,a temperature-controlling treatment was employed for the bimetal ZIFs,and the corresponding derivatives exhibited an excellent dissipation ability with a minimum reflection loss value of−54.3 dB and an effective bandwidth of 7.0 GHz at a thickness of 2.4 mm,which resulted from the strong dipole polarization ***,after successfully controlling the Zn/Co ratio,the attenuation capability was greatly enhanced at a thickness of 1.4 mm,with bandwidths of 13.0–18.0 ***,this work provides an ameliorated strategy for microwave absorption performance of carbon-based materials.

关键词： microwave absorption bi-meta based absorber single-atom metal organic frameworks(MOFs)derived composite dielectric relaxation

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Viroids:Small Probes for Exploring the Vast Universe of RNA Trafficking in Plants

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Journal of Integrative Plant Biology 2010年第1期52卷 28-39页

作者： Ying Wang biao Ding Department of Plant Cellular and Molecular Biology and Plant Biotechnology Center The Ohio State University The Center for RNA Biology The Ohio State University Molecular Cellular and DeVelopmental Biology Program The Ohio State University Columbus OH 43210 USA

Cell-to-cell and long-distance trafficking of RNA is a rapidly evolving frontier of integrative plant biology that broadly impacts studies on plant growth and development, spread of infectious agents and plant defense responses. The fundamental questions being pursued at the forefronts revolve around function, mechanism and evolution. In the present review, we will first use specific examples to illustrate the biological importance of cell-to-cell and long-distance trafficking of RNA. We then focus our discussion on research findings obtained using viroids that have advanced our understanding of the underlying mechanisms involved in RNA trafficking. We further use viroid examples to illustrate the great diversity of trafficking machinery evolved by plants, as well as the promise for new insights in the years ahead. Finally, we discuss the prospect of integrating findings from different experimental systems to achieve a systems-based understanding of RNA trafficking function, mechanism and evolution.

关键词： no English key word

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Experimental and numerical investigation of unsteady cavitating flows through a 2D hydrofoil

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Science China(Technological Sciences) 2011年第7期54卷 1801-1812页

作者： HUANG biao WANG GuoYu School of Vehicle and Transportation Engineering Beijing Institute of Technology Beifing 100081 China

In the present study, firstly, the unsteady cavitating flows around a hydrofoil are studied based on the flow visualization and detail velocity measurement, a high-speed video camera is used to visualize the flow structures, and a particle image velocimetry （PIV） technique is applied to the measurement of the time-averaged and instantaneous velocity and vorticity fields. The results show that the unsteadiness of mass transfer process between the vapor and the two-phase regions is substantial, a self-oscillatory behavior of the whole sheet cavitation is obtained, with large length fluctuations and vapor cloud shedding, and also the cavitation structure depends on the interaction of the water-vapor mixture and the periodic vortex shedding. The main purpose of this experimental study is to offer information for validating computational models, and shed light on the unsteady multiphase transport process of cavitating flows. Furthermore, with an emphasis on the dynamics of the attached turbulent cavitating flows, a filter-based model （FBM） is derived from the k-6 two-equation model, a conditional averaging method aimed at improving unsteady simulation is applied to computation. In comparison to the standard k-ε model, overall, the filter-based model is shown to improve the predictive capability considerably.

关键词： unsteady cavitating flows high-speed camera particle image velocimetry mass transfer ~ter-based turbulence models

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