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Improvement of stability of trivalent chromium electroplating of Ti based IrO_2+Ta_2O_5 coating anodes

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Rare Metals 2006年第Z1期25卷 645-649页

作者： LI Baosong lin An gan Fuxing Department of Environmental Engineering School of Resource and Environmental Science Wuhan University Wuhan 430079 China Department of Environmental Engineering School of Resource and Environmental Science Wuhan University Wuhan 430079 China Department of Environmental Engineering School of Resource and Environmental Science Wuhan University Wuhan 430079 China

The preparation process and properties of the thermally prepared Ti anodes coated with IrO2+Ta2O5 was studied. The structure and morphologies of the IrO2+Ta2O5 coatings were determined by XRD and SEM. Their electrochemical properties were studied by polarization curve and cyclic voltammetry. Trivalent chromium electroplating using Ti/IrO2+Ta2O5 anodes is carried out and the results were analyzed. Results show that this anode exhibits excellent electrochemical activity and stability in sulfate electrolysis. The electrocatalytic activity is determined not only by the content of IrO2 but also the structure and morphology of the anode coatings. The electroplating results indicats that Ti/IrO2+Ta2O5 anodes have excellent capabilities and merits in improving the stability of trivalent chromium electroplating in sulfate system.

关键词： IrO2+Ta2O5 trivalent chromium electroplating oxygen evolution oxide coated anode

The prediction formula and a risk-based sensor scheduling method in target detection with guiding information

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Defence Technology（防务技术） 2020年第2期16卷 447-452页

作者： Ce Pang gan-lin Shan Army Engineering University Shijiazhuang 050000People's Republic of China

Sensor scheduling is used to improve the sensing performance in the estimation of targets’***,few papers are on the sensor scheduling for target detection with guiding *** letter can remedy this deficiency.A risk-based target detection method with guiding information is provided firstly,based on which,the sensor scheduling approach is aiming at reducing the risk and uncertainty in target detection,namely risk-based sensor scheduling *** should be stressed is that the Prediction Formula in sensor scheduling is ***,some examples are conducted to stress the effectiveness of this proposed method.

关键词： Sensor scheduling Target detection Operational risk Information guiding

A non-myopic scheduling method of radar sensors for maneuvering target tracking and radiation control

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Defence Technology（防务技术） 2020年第1期16卷 242-250页

作者： gan-lin Shan Gong-guo Xu Cheng-lin Qiao Department of Electronic and Optical Engineering Army Engineering UniversityShijiazhuang 050003China

In decades,the battlefield environment is becoming more and more complex with plenty of electronic ***,in order to improve the survivability of radar sensors and satisfy the requirement of maneuvering target tracking with a low probability of intercept,a non-myopic scheduling is proposed to minimize the radiation cost with tracking accuracy *** first,the scheduling problem is formulated as a partially observable Markov decision process(POMDP).Then the tracking accuracy and radiation cost over the future finite time horizon are predicted by the posterior carmer-rao lower bound(PCRLB) and the hidden Markov model filter,***,the proposed scheduling is implemented efficiently by utilizing the branch and bound(B&B) pruning *** results show that the performance of maneuvering target tracking was improved by the improved interacting multiple model(IMM),and the scheduler time and maximum memory consumption were significant reduced by the present B&B pruning algorithm without losing the optimal solution.

关键词： Non-myopic scheduling Radiation control PCRLB POMDP Branch and bound

Effect of tungsten oxide on ceria nanorods to support copper species as CO oxidation catalysts

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Journal of Rare Earths 2021年第1期39卷 43-50,I0002页

作者： Yu'nan Li lin gan Rui Si Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials and School of Material Science and EngineeringHubei UniversityWuhan 430062China Zhangjiang Laboratory Shanghai Synchrotron Radiation FacilityShanghai 201204China

In this work,tungsten oxide with different concentrations(0,0.4 at%,2.0 at%and 3.2 at%)was introduced to the ceria nanorods via a deposition-precipitation(DP)approach,and copper species of ca.10 at%were sequentially anchored onto the modified ceria support by a similar DP *** aim of the study was to investigate the effect of the amount of tungsten oxide(0,0.4 at%,2.0 at%,and 3.2 at%)modifier on the copper-ceria catalysts for CO oxidation reaction and shed light on the structure-activity *** the aids of multiple characterization techniques including N2 adsorption,high-resolution transmission electron microscopy(HRTEM),powder X-ray diffraction(XRD),X-ray absorption fine structure(XAFS),and temperature-programmed reduction by hydrogen(H2-TPR)in combination with the catalytic performance for CO oxidation reaction,it is found that the copper-ceria samples maintain the crystal structure of the fluorite fcc CeO2 phase with the same nanorod-like morphology with the introduction of tungsten oxide,while the textural properties(the surface area,pore volume and pore size)of ceria support and copper-ceria catalysts are changed,and the oxidation states of copper and tungsten are kept the same as Cu2+and W6+before and after the reaction,but the introduction of tungsten oxide(WO3)significantly changes the metal-support interaction(transfer the CuOx clusters to Cu-[Ox]-Ce species),which delivers to impair the catalytic activity of copper-ceria catalysts for CO oxidation reaction.

关键词： Copper catalyst Ceria Tungsten oxide CO oxidation Structure-activity relationship Rare earths

Influence of high overload on the collimating lenses of laser ranging systems

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Defence Technology（防务技术） 2020年第2期16卷 354-361页

作者： lin gan He Zhang Bin Liu Junhong Wang Nanjing University of Science and Technology School of Mechanical EngineeringNanjing 210094China Northwest Industrial Group Co. Ltd.Xi’anChina

Collimating lenses are an important component of laser ranging systems,and high overload environments severely affect the beam shaping effect of such *** study proposes a buffer isolation method on the basis of impact stress wave attenuation theory for collimating lens spacers,ANSYS finite element software was applied to simulate the high load dynamics of collimating lenses,and the buffer isolation performance of different materials and composite structures was compared and *** simulation analysis of the collimating lenses under different buffer conditions was performed using ZEMAX software to study the mechanism by which a high overload affects the collimating *** overload and optical shaping experiments based on theoretical analysis were further *** showed the superiority of butadiene rubber to polytetrafluoroethylene after application of 70000 g impact *** combination-gasket method was superior to the single-gasket method,and the sandwich combination-gasket method was superior to the double-layer combination-gasket method.

关键词： High overload Laser ranging Emission lens Buffer isolation

An angular blinking jamming method based on electronically controlled corner reflectors

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Journal of Systems Engineering and Electronics 2024年第2期35卷 330-338页

作者： gan lin WU Zehao WANG Xuesong LI Jianbing State Key Laboratory of Complex Electromagnetic Environmental Effects on Electronics and Information System National University of Defense TechnologyChangsha 410073China

Passive jamming is believed to have very good potential in countermeasure *** this paper,a passive angular blinking jamming method based on electronically controlled corner reflectors is *** amplitude of the incident wave can be modulated by switching the corner reflector between the penetration state and the reflection state,and the ensemble of multiple corner reflectors with towing rope can result in complex angle decoying *** of the decoying effect on corner reflectors’radar cross section and positions are analyzed and *** show that the angle measured by a monopulse radar can be significantly interfered by this method while the automatic tracking is employed.

关键词： monopulse radar angular blinking jamming corner reflector amplitude-comparison angle measurement metasurface

The Effect of Nd^(3+) Concentration on Upconversion Luminescence in Yb^(3+)/Tm^(3+)/Nd^(3+) Tripledoped b-NaGdF_(4) Nanocrystals

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Journal of Wuhan University of Technology(Materials Science) 2022年第3期37卷 393-398页

作者： HOU Huayu gan lin WANG Youfa WANG Wei State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China School of Automotive Engineering Wuhan University of TechnologyWuhan 430070China Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of TechnologyWuhan 430070China Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan University of TechnologyWuhan 430070China

Nd^(3+)-doped NaGdF_(4):Yb,Tm nanocrystals were synthesized by an improved high-temperature thermal decomposition method,and the effects of doping concentrations on the crystal structure,phase composition,and upconverted fluorescence intensity were also *** results reveal that the introduction of Nd^(3+) ions does not cause the transformation of the crystal phase,but induce the change of the unit cell ***,the fluorescence intensity of the synthesized nanocrystals when co-doped with 3 mol%Nd^(3+) is the strongest under the excitation of 980 nm laser,which is 3.9 times that of the Nd^(3+)-free doped nanoparticles,and the average size is 62.9 *** it is located in the blue area of the CIE coordinate diagram,and the corresponding color purity is 91.81%under the same experimental *** resulting nanocrystals show the potential as excellent fluorescence labeling and in vivo imaging probes.

关键词： upconversion Nd^(3+)doped fluorescence intensity β-NaGdF4

Memristor-based spiking neural networks:cooperative development of neural network architecture/algorithms and memristors

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Chip 2024年第2期3卷 62-78页

作者： Huihui Peng lin gan Xin Guo School of Materials Science and Engineering Huazhong University of Science and TechnologyWuhan 430074China

Inspired by the structure and principles of the human brain,spike neural networks(SNNs)appear as the latest generation of artificial neural networks,attracting significant and universal attention due to their remarkable low-energy transmission by pulse and powerful capability for large-scale parallel *** research on artificial neural networks gradually change from software simulation into hardware ***,such a process is fraught with *** particular,memristors are highly anticipated hardware candidates owing to their fastprogramming speed,low power consumption,and compatibility with the complementary metal–oxide semiconductor(CMOS)*** this review,we start from the basic principles of SNNs,and then introduced memristor-based technologies for hardware implementation of SNNs,and further discuss the feasibility of integrating customized algorithm optimization to promote efficient and energy-saving SNN hardware ***,based on the existing memristor technology,we summarize the current problems and challenges in this field.

关键词： Spike neural networks Hardware Memristor Algorithm Cooperative development

Recent progress and future prospect of digital soil mapping： A review

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Journal of Integrative Agriculture 2017年第12期16卷 2871-2885页

作者： ZHANG gan-lin LIU Feng SONG Xiao-dong State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil Science Chinese Academy of Sciences Nanjing 210008 P.R China University of Chinese Academy of Sciences Beijing 100049 P.R. China

To deal with the global and regional issues including food security, climate change, land degradation, biodiversity loss, water resource management, and ecosystem health, detailed accurate spatial soil information is urgently needed. This drives the worldwide development of digital soil mapping. In recent years, significant progresses have been made in different aspects of digital soil mapping. The main purpose of this paper is to provide a review for the major progresses of digital soil mapping in the last decade. First, we briefly described the rise of digital soil mapping and outlined important milestones and their influence, and main paradigms in digital soil mapping. Then, we reviewed the progresses in legacy soil data, environmental covariates, soil sampling, predictive models and the applications of digital soil mapping products. Finally, we summarized the main trends and future prospect as revealed by studies up to now. We concluded that although the digital soil mapping is now moving towards mature to meet various demands of soil information, challenges including new theories, methodologies and applications of digital soil mapping, especially for highly heterogeneous and human-affected environments, still exist and need to be addressed in the future.

关键词： digital soil mapping soil-landscape model predictive models soil functions spatial variation