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MCTSR:A super-resolution method for defects in gas-insulated switchgear X-ray images based on multi-scale contextual transformers

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High Voltage 2023年第3期8卷 504-513页

作者： Guote Liu Jinhui Zhou Linqiang Xu Licheng Li bing luo Sijun Chen School of Mechatronic Engineering and Automation Foshan UniversityFoshanChina School of Electric Power Engineering South China University of TechnologyGuangzhouChina Research Institute of China Southern Power Grid Co. Ltd.GuangzhouChina Guangdong Shuangdian Technology Co. Ltd.DongguanChina

As the core equipment of transmission and distribution hubs,the operational status of gas-insulated switchgear(GIS)is closely linked to the safety of the power ***,X-ray digital imaging technology has been extensively used in GIS equipment fault ***,the X-ray image of GIS is blurred,which is not conducive to the detection of tiny ***,a super-resolution method for GIS X-ray images based on multi-scale context transformers is proposed in this study,namely ***,a second-order image degradation model is introduced to generate GIS X-ray lowresolution images that more closely resemble the real ***,a contextual transformer gate module is constructed to improve attention to tiny defects in GIS X-ray ***,a U-Net discriminator network based on multi-scale contextual transformers is intended to enrich the information of the generated ***,the proposed discriminator is combined with the existing generator to compose a superresolution method applicable to GIS X-ray *** experimental results demonstrate that the method outperforms other methods in peak signal-to-noise ratio and structural similarity on the constructed GIS X-ray image *** addition,the output image of the proposed method facilitates the subsequent defect detection.

关键词： image resolution contextual

Noble-metal free plasmonic nanomaterials for enhanced photocatalytic applications—A review

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Nano Research 2022年第12期15卷 10268-10291页

作者： Jinghua Li Yiming Zhang Yalong Huang bing luo Li Jing Dengwei Jing International Research Center for Renewable Energy&State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong UniversityXi’an710049China School of Chemical Engineering and Technology Xi’an Jiaotong UniversityXi’an710049China

Plasmonic nanomaterial catalysis is currently at the frontier of photocatalysis,overcoming the limitations of wide bandgap semiconductors for light *** localized surface plasmon resonance(LSPR)properties allow broad ultraviolet-visible-near infrared ray(UV-vis-NIR)absorption,making it an ideal material for solar energy *** plasmonic nanostructures rely on precious *** noble metal plasmonic nanomaterials have proven to be one of the strategies for enhancing photocatalytic activity,their expensive cost and limitations in light absorption range have hindered their practical *** a result,noble-metal free plasmonic nanomaterials have risen to the top of the research priority ***,this paper reviews the fundamental principles and classification of the LSPR effect of noble-metal free plasmonic nanomaterials in photocatalytic and their recent applications in hydrogen generation,carbon dioxide reduction,and pollutant *** cases elucidate the possible working mechanism of enhanced photocatalysis by noble-metal free plasmonic ***,the challenges and future opportunities for noble-metal free plasmonic nanomaterials in energy conversion and storage are discussed and envisioned.

关键词： localized surface plasmon resonance(LSPR) noble-metal free plasmonic nanomaterials photocatalysis

Implementing method of optimum front-end conditioner based on Butterworth filter

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Nuclear Science and Techniques 2006年第4期17卷 232-236页

作者： ZHANG Ruan-Yu luo Xiao-bing LI Tai-Hua Key Laboratory for Radiation Physics and Technology of Ministry of Education of China Physics Science and Technology College of Sichuan University Chengdu 610064 China

The front-end conditioner is an essential part of digital systems of nuclear spectrometer, which functions in two ways: (1) prevents saturation of the subsequent ADC; (2) limits the bandwidth of frequency to realize anti-aliasing. To realize the above-mentioned functions, an optimum front-end conditioner for a resistive feedback charge-sensitive preamplifier is designed. In the conditioner, the pole-zero compensation (P/Z compensation) tech- nique was used to effectively filter signals from the preamplifier. The Butterworth filter was improved after the pole-zero position was optimally set up to shape the wave of output, which tallied with the whole system. The front-end conditioner can resolve the aberration of waveform of nuclear signals in a regular Butterworth filter. Com- pared with the traditional triple-pole filtering circuitry, the circuitry of this conditioner is more compact and flexible. Moreover, its output waveform is more symmetrical and the signal-to-noise ratio (SNR) is higher. The improvement in the resolution of spectrometer is also significant.

关键词：数字式核子能谱仪极点-零点补偿巴特沃斯滤波器前端调节器

Controlling factors of Dengying Formation reservoirs in the central Sichuan paleo-uplift

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Petroleum Research 2017年第1期2卷 54-63页

作者： bing luo Yaoming Yang Wenjun luo Long Wen Wenzhi Wang Kang Chen Research Institute of Exploration and Development PetroChina Southwest Oil&Gas Field CompanySichuan 610041China

Macroscopic and microscopic characteristics revealed that the Dengying Formation reservoir in the central Sichuan paleo-uplift belonged to the compound genetic reservoir of the mound-shoal facies and *** of the reservoir was controlled by the mound-shoal facies,and dissolution-enlarged or added pores(vugs)due to superimposed karstification modification were favorable reservoir *** karst of the Dengying Formation in Tongwan stage was the stratabound-weathered crust karst of the early diagenesis stage,the extensive superimposition of mound-shoal facies and regional karstification in the central Sichuan paleo-uplift area was the key to develop the large-scale continuous Dengying Formation *** to differences in the development degree of mound-shoal facies and in the intensity of karst modification,the reservoir development degree varied in different zones in the paleouplift *** NS-extending zone on the western side of the Gaoshiti-Moxi area was the sweet spot for reservoir *** identification of mound-shoal facies and fine depiction of karst landform was the key for reservoir prediction of the Dengying Formation to discovery the superimposed area of the mound-shoal facies and the karst monadnock-karst steep slope which similar to Moxi-Gaoshiti area.

关键词： Dengying Formation Karst The mound-shoal facies Reservoir Sweet spot The central Sichuan paleo-uplift Sichuan Basin

Corrosion behavior of low alloy steel for cargo oil tank under upper deck conditions

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Journal of Iron and Steel Research International 2018年第1期25卷 120-130页

作者： Hao Li Feng Chai Cai-fu Yang Chao Li Xiao-bing luo Central Iron and Steel Research Institute Beijing 100081China Qingdao NCS Testing Protection Technology Co. Ltd.Qingdao 266071 Shandong China

A simulated corrosion test apparatus was used to investigate the corrosion behavior of a low alloy steel under simulated upper deck conditions in a cargo oil tank. The estimated corrosion loss of conventional E36 class ship plate steel is 4.27 mm, which is clearly inadequate compared with the standard adopted by International Maritime Organization. Outer rust layer of specimens starts to peel off after 77 days and becomes fragmented after 98 days. X-ray diffraction, scanning electron micros- copy, and Raman spectroscopy revealed that the resulting rust is composed of σ-FeOOH （the main protective phase）, Fe2O3, FeS, elemental S, and FeSO4. FeSO4 in the interface of the base and rust layer leads to localized corrosion. Elemental sulfur forms on the surface of σ-FeOOH, and the quantity and size thereof increase with increasing corrosion time. Furthermore, layered elemental sulfur promotes fracture and peels off the rust layer.

关键词： Low alloy steel Cargo oil tank Upper deck Corrosion film Elemental sulfur

The Establishment and Development of the System of Scenic Areas of China

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中国园林 2012年第11期28卷 9-10页

作者： WANG bing-luo

Vortical structures and density fluctuations analysis of supersonic forward-facing step controlled by self-sustaining dual synthetic jets

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Acta Mechanica Sinica 2020年第6期36卷 1215-1227,I0002页

作者： Qiang Liu Zhen-bing luo Xiong Deng Yan Zhou Lin Wang Pan Cheng College of Aerospace Science and Engineering National University of Defense TechnologyChangsha410073China

Shock wave/boundary layer interaction(SWBLI)is still one of the unresolved bottlenecks that restrict the development of more advanced flight *** forward-facing step(FFS),an extreme case of compression ramp,often occurs severe SWBLIs with a large separation *** this paper,experimental investigations on vortical structures and density fluctuations characteristics of supersonic FFS controlled by self-sustaining dual synthetic jets(SDSJ)are carried out in a Mach number 2.95 wind *** spatial–temporal resolution flowfield images of FFS without/with active flow control are captured by adopting nano-particle-based planar laser scattering *** control effects of the distance between the actuator and the step are mainly *** paper finds that the SDSJ can effectively change the feature of flowfield,eliminate the separation shock and the reattachment shock,compel the original shock induced by the step leading edge to distort and reduce its intensity *** fluctuations analysis demonstrates that the whole flows seem to move upstream with the increase of distance(dS-J).Discrete Fourier transformation spectrums results reveal that the fluctuations are mainly located in the low-frequency region at ***-frequency components and frequency bandwidth increase slightly after the SDSJ are applied.

关键词： Forward-facing step Self-sustaining dual synthetic jets Flow control Fine structures Density fluctuations

Strengthening and toughening mechanism of a Cu-bearing high-strength low-alloy steel with refined tempered martensite/bainite(M/B)matrix and minor inter-critical ferrite

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Journal of Iron and Steel Research International 2021年第4期28卷 464-478页

作者： Fei Zhu Feng Chai Xiao-bing luo Zheng-yan Zhang Cai-fu Yang Department of Structural Steels Central Iron and Steel Research InstituteBeijing 100081China

The microstructure–mechanical property relationship of a Cu-bearing low-carbon high-strength low-alloy steel,subjected to a novel multistage heat treatment including quenching(Q),lamellarization(L)and tempering(T),is *** strength of 989.5 MPa and average toughness at-80℃of 41 J were obtained in this steel after quenching and tempering(QT)heat *** QLT gained a little lower yield strength(982.5 MPa),but greatly enhanced average toughness at-80℃(137 J).To further clarify the strengthening and toughening mechanisms in specimen QLT,parameters of microstructural characteristic and crack propagation process were compared and analyzed for specimens Q,QL,QT and *** microstructure of tempered martensite/bainite(M/B)in specimen QT changed to refined tempered M/B matrix mixed with minor IF(inter-critical ferrite)in specimen ***-rich precipitates existed in tempered M/B for both specimens QT and QLT,as well as in *** with QT,adding a lamellarization step before tempering made the effective grains of specimen QLT refined and also led to coarser Cu-rich precipitates in tempered M/B *** weaker strengthening effect of coarser Cu-rich precipitates should be a key reason for the slightly lower yield strength in specimen QLT than in specimen *** austenite was found in all specimens Q,QL,QT and *** QLT showed purely ductile fracture mode at-80℃due to the refined effective *** greatly improved toughness is mainly attributed to the enhanced energy of crack *** combination of refined microstructure,softened matrix and deformation of minor'soft'IF during crack propagation led to the most superior toughness of specimen QLT among all specimens.

关键词： High-strength low-alloy steel Multistage heat treatment Low-temperature toughness Strengthening mechanism Grain refinement Crack propagation

Boosting photocatalytic hydrogen production via interfacial engineering over a Z-scheme core/shell heterojunction

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Nano Research 2023年第1期16卷 352-359页

作者： bing luo Jinghua Li Wei Wang Chaoqian Ai Haihan Zhang Yuxin Zhao Dengwei Jing School of Chemical Engineering and Technology Xi'an Jiaotong UniversityXi'an 710049China International Research Center for Renewable Energy&State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong UniversityXi’an 710049China

Designing high efficacy photocatalysts is a promising way to improve solar fuel production *** this work,we prepared a core/shell composite of loose ZnCr layered double hydroxide nanosheets modified CdS nanorods for efficient visible light driven photocatalytic hydrogen *** highest hydrogen production rate achieved 425.8μmol·h^(−1) without adding any noble metal cocatalyst under the visible light stimulus,which is 22.4 times that of 1 wt.%Pt-modified *** corresponding apparent quantum yield is 13.9%at 420 *** is revealed that the synergistic actions of the interfacial redox shuttle of Cr^(3+)/Cr^(δ+)and the interfacial electric field enable the efficient separation of photoinduced charge carriers between two components via a Z-scheme energy band ***,with the hydrogen evolution contribution of Zn^(2+),a remarkable improvement in photocatalytic performance was achieved in contrast to bare *** work provides an effective methodology to construct highly efficient and economically viable photocatalysts for solar H_(2)production and mechanistic study.

关键词： photocatalysis heterojunction interfacial engineering noble metal free hydrogen production