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Digital Communications and Networks 2022年第6期8卷 877-884页

作者： shuai Xiao Jiachen Yang Zhihan lv School of Electrical and Information Engineering Tianjin UniversityTianjin300072China Department of Game design Faculty of ArtsUppsala UniversitySweden

With the advent of the 5G Internet of Things era,communication and social interaction in our daily life have changed a lot,and a large amount of social data is transmitted to the *** the same time,with the rapid development of deep forgery technology,a new generation of social data trust crisis has also ***,how to ensure the trust and credibility of social data in the 5G Internet of Things era is an urgent problem to be *** paper proposes a new method for forgery detection based on *** first discover the hidden gradient information in the grayscale image of the forged image and use this gradient information to guide the generation of forged *** the classifier,we replace the traditional binary loss with the focal loss that can focus on difficult-to-classify samples,which can achieve accurate classification when the real and fake samples are *** results show that the proposed method can achieve high accuracy on the DeeperForensics dataset and with the highest accuracy is 98%.

关键词： Forgery detection Trace generation Social data Privacy protection

Mechanical synergistic interaction between adjacent corrosion defects and its effect on pipeline failure

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Petroleum Science 2023年第4期20卷 2452-2467页

作者： Wei Wang Yi Zhang Jian shuai Yi shuai Lei Shi Zhi-Yang lv College of Safety and Ocean Engineering China University of PetroleumBeijing102249China Key Laboratory of Oil and Gas Safety and Emergency Technology Ministry of Emergency ManagementBeijing102249China Sinopec(Dalian)Research Institute of Petroleum and Petrochemicals Co. LtdDalianLiaoning116014China

This work provides a new comprehensive assessment method to determine the complex mechanical interaction of adjacent corrosion ***,a three-dimensional(3D)finite element model of pipelines containing adjacent defects(involving longitudinally aligned,circumferentially aligned,and diagonally aligned defects)was developed and validated by full-scale burst ***,the synergistic stress interaction between adjacent defects was analyzed,and the relationship between the burst position of the pipeline and defect spacing was *** last,the applicability of several commonly used critical spacing rules for identifying the interaction between adjacent defects was compared and discussed in *** results show that the failure position of the pipeline containing adjacent defects is related to the relative position of *** longitudinally aligned corrosion defects,the stronger the interaction between defects(i.e.,the shorter the distance between two defects),the closer the failure position of the pipeline to the center of the defect *** circumferentially aligned corrosion defects,the failure position of the pipe tends to move from the defect edge to the geometric center of the defect with increasing defect *** diagonally aligned defects,the failure position is generally located on the path connecting the defect and the *** currently available evaluation criteria for identifying circumferentially interacting defects display the most accuracy,and the identification effect of diagonally aligned defects is the *** addition,the critical spacing rule proposed by Li presents the highest precision in identifying the interacting *** results are expected to provide a stress synergistic failure assessment method for pipelines containing cluster corrosion defects in engineering.

关键词： Pipelines Adjacent defects Interaction Failure position Finite element model

Anti-aging performance improvement and enhanced combustion efficiency of boron via the coating of PDA

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Defence Technology（防务技术） 2024年第3期33卷 399-410页

作者： shuai Ma Qinghai Shu Mengyang Zhang Hongyu Huang Yansong Shi Xijuan lv shuai Zhao School of Materials Science and Engineering Beijing Institute of TechnologyBeijing100081China Key Lab of Advanced Optoelectronic Quantum Architecture and Measurement(MOE) Beijing Key Lab of Nanophotonics&Ultrafine Optoelectronic SystemsSchool of PhysicsBeijing Institute of TechnologyBeijing100081China Tangshan Research Institute of Beijing Institute of Technology Tangshan063000HebeiChina

Boron is an ambitious fuel in energetic materials since its high heat release values,but its application is prohibited by low combustion efficiency and oxidization during *** polydopamine(PDA)was introduced into boron particles,investigating the impact of PDA content on the energetic behavior of *** results indicated that the PDA coating formed a fishing net structure on the surface of boron *** heat release results showed that the combustion calorific value of B@PDA was higher than that of the raw ***,the actual combustion heat of boron powder in B@10%PDA increased by 38.08%.Meanwhile,the DSC peak temperature decreased by 100.65℃under similar oxidation rate compared to raw ***,the B@PDA@AP and B@AP composites were prepared,and their combustion properties were *** was demonstrated that B@10%PDA@AP exhibited superior performance in terms of peak pressure and burning time,*** peak pressure is 12.43 kPa more than B@AP and burning time is 2.22 times higher than B@***,the coating of PDA effectively inhibits the oxidization of boron during storage and enhances the energetic behavior of boron and corresponding composites.

关键词： Boron particles Polydopamine Anti-aging performance improvement Heat release

Self-supported transition metal phosphide based electrodes as high-efficient water splitting cathodes

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Frontiers of Chemical Science and Engineering 2018年第3期12卷 494-508页

作者： Yan Zhang Jian Xiao Qiying lv shuai Wang State Key Laboratory of Digital Manufacturing Equipment and Technology Key Laboratory of Material Chemistry for Energy Conversion and Storage (Ministry of Education) School of Chemistry and Chemical Engineering Huazhong University of Science and Technology Wuhan 430074 China Flexible Electronics Research Center (FERC) School of Mechanical Science and Engineering Huazhong University of Science and Technology Wuhan 430074 China

Electrolytic water splitting has been considered as a promising technology to produce highly pure H2 by using electrical power produced from wind, solar energy or other fitful renewable energy resources. Combining novel self-supporting structure and high-performance transition metal phosphides （TMP） shows substantial promise for practical application in water splitting. In this review, we try to provide a comprehensive analysis of the design and fabrication of various self-supported TMP electrodes for hydrogen evolution reaction, which are divided into three categories： catalysts growing on carbon-based substrates, catalysts growing on metal-based substrates and free- standing catalyst films. The material structures together with catalytic performances of self-supported electrodes are presented and discussed. We also show the specific strategies to further improve the catalytic performance by elemental doping or incorporation of nanocarbons. The simple and one-step methods to fabricate self-supported TMP electrodes are also highlighted. Finally, the chal- lenges and perspectives for self-supported TMP electrodes in water splitting application are briefly discussed.

关键词： transition metal phosphide self-supported electrode electrocatalysis hydrogen evolution reaction

The BEM based on conformal Duffy-distance transformation for three-dimensional elasticity problems

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Science China(Technological Sciences) 2020年第12期63卷 2575-2583页

作者： TAN Fei LIANG JiaWei JIAO YuYong ZHU shuai lv JiaHe Faculty of Engineering China University of GeosciencesWuhan 430074China

Here,we describe the robust and efficient application of the conventional 3D BEM in solving elasticity problems. We have focused on the precise computation of weakly singular integrals. The conformal Duffy-distance transformation was employed to alleviate near singularities caused from two aspects:(1) the large aspect ratio of elements,i.e.,element shape distortions;and(2)the closeness of element boundaries to field points,i.e.,ill-shaped patches. Then,the rigid body motion method was employed to evaluate strongly singular integrals. Numerical solutions of 3D elastostatic problems demonstrated the high accuracy of the proposed method with coarse meshes and high convergence rates with mesh refinement. Compared with the Duffy transformation and original polar coordinate transformations,the proposed method is insensitive to element shapes.

关键词： singular integrals boundary element method elasticity problems conformal transformation Duffy transformation distance transformation

Optimal CNN-based semantic segmentation model of cutting slope images

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Frontiers of Structural and Civil Engineering 2022年第4期16卷 414-433页

作者： Mansheng LIN shuai TENG Gongfa CHEN Jianbing lv Zhongyu HAO School of Civil and Transportation Engineering Guangdong University of TechnologyGuangzhou 510006China JSTI Group Guangdong Inspection and Certification Co.Ltd Nanjing 210000China

This paper utilizes three popular semantic segmentation networks,specifically DeepLab v3+,fully convolutional network(FCN),and U-Net to qualitively analyze and identify the key components of cutting slope images in complex scenes and achieve rapid image-based slope *** elements of cutting slope images are divided into 7 *** order to determine the best algorithm for pixel level classification of cutting slope images,the networks are compared from three aspects:a)different neural networks,b)different feature extractors,and c)2 different optimization *** is found that DeepLab v3+with Resnet18 and Sgdm performs best,FCN 32s with Sgdm takes the second,and U-Net with Adam ranks *** paper also analyzes the segmentation strategies of the three networks in terms of feature map *** show that the contour generated by DeepLab v3+(combined with Resnet18 and Sgdm)is closest to the ground truth,while the resulting contour of U-Net(combined with Adam)is closest to the input images.

关键词： slope damage image recognition semantic segmentation feature map visualizations

Ta-Doped Sb2Te Allows Ultrafast Phase-Change Memory with Excellent High-Temperature Operation Characteristics

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Nano-Micro Letters 2021年第2期13卷 221-231页

作者： Yuan Xue shuai Yan Shilong lv Sannian Song Zhitang Song State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050People’s Republic of China

Phase-change memory(PCM)has considerable promise for new applications based on von Neumann and emerging neuromorphic computing ***,a key challenge in harnessing the advantages of PCM devices is achieving high-speed operation of these devices at elevated temperatures,which is critical for the efficient processing and reliable storage of data at full ***,we report a novel PCM device based on Ta-doped antimony telluride(Sb2Te),which exhibits both high-speed characteristics and excellent high-temperature characteristics,with an operation speed of 2 ns,endurance of >106 cycles,and reversible switching at 140℃.The high coordination number of Ta and the strong bonds between Ta and Sb/Te atoms contribute to the robustness of the amorphous structure,which improves the thermal ***,the small grains in the three-dimensional limit lead to an increased energy efficiency and a reduced risk of layer segregation,reducing the power consumption and improving the long-term *** findings for this new Ta-Sb2Te material system can facilitate the development of PCMs with improved performance and novel applications.

关键词： Phase-change memory High speed Ta High-temperature operation

Glutathione-triggered non-template synthesized porous carbon nanospheres serve as low toxicity targeted delivery system for cancer multi-therapy

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Chinese Chemical Letters 2021年第5期32卷 1765-1769页

作者： Haoyuan lv shuai Ma Zhenbo Wang Xiaoting Ji Shaoping lv Caifeng Ding Key Laboratory of Optic-Electric Sensing and Analytical Chemistry for Life Science Ministry of EducationShandong Key Laboratory of Biochemical AnalysisKey Laboratory of Analytical Chemistry for Life Science in Universities of ShandongCollege of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao 266042China Qingdao Central Hospital Qingdao 266042China

Nano material based drug delivery system have received great attention in clinical application due to their high therapeutic efficacy and lower side effects than classical method,multi-functional nanomaterial also have shown the excellent performance at cancer theranostic and durg tracking in vivo and in ***,most of these works are influenced by the bio-toxicity of applied nanomaterials,which could influence the diagnostic results and treatment ***,we have prepared a high biocompatibility porous carbon nanospheres(PCNs) based nano-system(PCN-siRNA-DOX-FA) for targeted drug delivery and the *** surface modifications have increased dispersion and stability of the PCNs,and folic acid(FA) had enhanced the active target ability for FA receptor positive cell ***,through the siRNA structure and doxorubicin(DOX) loading,biological and chemical combined multi-therapy was achieved in cancerous *** constructed nano-system could positively improve the biotoxicity problem of nanomaterial and provide a potential platform for clinical cancer theranostic applications.

关键词： Cell imaging analysis Drug delivery Biothiol sensing Low biotoxicity Porous carbon

Controllable synthesis of core-shell Co@C@SiO2 catalysts for enhancing product selectivity in Fischer-Tropsch synthesis by tuning the mass transfer resistance

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Journal of Energy Chemistry 2020年第12期29卷 199-206页

作者： Yao Chen Xin Li Liya Dai Mehar U Nisa Chengchao Liu shuai lv Jing lv Zhenhua Li Key Lab for Green Chemical Technology of Ministry of Education School of Chemical Engineering and TechnologyCollaborative Innovation Center of Chemical Science and Engineering(Tianjin)Tianjin UniversityTianjin 300072China Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission&Ministry of Education College of Chemistry and Materials ScienceSouth-Central University for NationalitiesWuhan 430074HubeiChina

Fischer-Tropsch synthesis(FTS) is the key step in converting syngas into clean fuels. Traditional supported catalysts for FTS are problematic because the active metal crystalline size is positively related to metal loading. Therefore, increasing active metal loading may reduce the cobalt time yield(CTY) since a high CTY is usually obtained when the Co size is 8 nm. Here, a ZIF-67(Zeolitic imidazolate framework-67) with a MOF(Metal organic framework) structure is used as a precursor to prepare the Co@C catalyst with not only high cobalt loading(55.6 wt%) but also with a small cobalt crystal size(as small as 8.6 nm). Coreshell Co@C@SiO2-X catalysts with different SiO2 shell thicknesses were successfully prepared by coating different amounts of TEOS on the outer surface of Co@C to modify product selectivity. Compared with40 wt% Co/SiO2 catalyst, core-shell Co@C@SiO2-X catalysts exhibited improved FTS performance. Furthermore, different gaseous hourly space velocities(GHSVs) were used to obtain CO conversion at similar levels to compare CTY and the turnover frequency(TOF). Among the catalysts, the Co@C@SiO2-1 catalyst, with its better mass transfer ability and suitable hydrophilic property, presented the highest TOF(9.75 × 10-3 s-1) and lowest CH4 selectivity(9.75%). In addition, heavy hydrocarbons were effectively suppressed with the increase in shell thickness due to the increased mass transfer resistance.

关键词： Fischer-Tropsch synthesis ZIF-67 Product selectivity Core-shell catalyst Hydrophilic property