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China Petroleum Processing & Petrochemical Technology 2024年第1期26卷 1-11页

作者： Li Huifeng Li Mingfeng Zhang Le Wang Wei Nie Hong National Energy R&D Center of Petroleum Refining Technology SINOPEC Research Institute of Petroleum Processing Co.Ltd.Beijing 100083China

To prepare a highly efficient NiMo/Al_(2)O_(3) hydrodesulfurization catalyst,the co.bined effects of specific organic functional groups and alumina surface characteristics were ***,the co.relation between the surface characteristics of four different alumina and the existing Mo species states was *** was found that the Mo equilibrium adsorption capacity can be used as a specific descriptor to quantitatively evaluate the changes in surface characteristics of different alumina.A lower Mo equilibrium adsorption capacity for alumina means weaker metal-support interaction and the loaded Mo species are easier to transform into ***,the Mo-O-Al bonds still exist at the metal-support *** introduction of cationic surfactant hecadecyl trimethyl ammonium bromide(CTAB)can further improve Mo species dispersion through electrostatic attraction with Mo anions and interaction of its alkyl chain with the alumina surface;meanwhile,the introduction of ethylenediamine tetraacetic acid(EDTA)can co.plex with Ni ions to enhance the Ni-promoting effect on ***,the NiMo catalyst designed using alumina with lower Mo equilibrium adsorption capacity and the simultaneous addition of EDTA and CTAB exhibits the highest hydrodesulfurization activity for 4,6-dimethyl dibenzothiophene because of its proper metal-support interaction and more well-dispersed Ni-Mo-S active phases.

关键词： alumina Mo equilibrium adsorption capacity organic functional groups metal-support interaction hydrodesulfurization

Mechanical properties and energy evolutions of burst-prone co.l samples with holes and fillings

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International Journal of co.l Science & Technology 2024年第3期11卷 176-189页

作者： Yukai Fu Yongzheng Wu Junchen Li Penghe Zhou Zhuoyue Sun Jie He CCTEG co.l Mining research institute Beijing100013China co.l Mining and Designing Department Tiandi Science and Technology Co.Ltd.Beijing100013China co.l Mining and Designing Branch China Coal Research InstituteBeijing100013China Resource Engineering Department China University of Mining and TechnologyBeijing100083China

During the mining process of impact-prone co.l seams,drilling pressure relief can reduce the impact propensity of the co.l seam,but it also reduces the integrity and strength of the co.l mass at the side of the ***,studying the mechanical properties and energy evolution rules of co.l samples co.taining holes and filled structures has certain practical significance for achieving co.rdinated co.trol of co.l mine rockburst disasters and the stability of roadway surrounding *** achieve this aim,seven types of burst-prone co.l samples were prepared and subject to uniaxial co.pression experiments with the aid of a TAW-3000 electro-hydraulic servo testing ***,the stress–strain curves,aco.stic emission signals,DIC strain fields and other data were co.lected during the ***,the failure modes and energy evolutions of samples with varying drilled hole sizes and filling materials were *** results show that the indexes related to burst propensity of the drilled co.l samples decline to some extent co.pared with those of the intact one,and the decline is positively co.elated to the diameter of the drilled *** hole filling,the strain co.centration degree around the drilled hole is lowered to a certain degree,and polyurethane filling has a more remarkable effect than cement ***,hole filling can enhance the strength and deformation resistance of *** drilling can accelerate the release of accumulated elastic strain energy,turning the aco.stic emission events from low-frequency and high-energy ones to high-frequency and low-energy ones,whereas hole filling can reduce the intensity of energy *** experimental results and theoretical derivation demonstrate that hole filling promotes co.l deformability and strength mainly by weakening stress co.centration surrounding the drilled ***,the fillings can achieve a better filling effect if their elastic modulus and Poisson’s ratio are closer

关键词： Rock mechanics co.l Mechanical properties Hole filling Energy evolution

Effect of Mo and co.d forging deformation on strength and ductility of co.alt-based alloy L605

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Journal of Iron and Steel research International 2024年第7期31卷 1811-1823页

作者： Zhong-lin Wang Zhi-hua Gong Quan Li Han-sheng Bao School of Materials and Metallurgy Inner Mongolia University of Science and TechnologyBaotou 014017Inner MongoliaChina institute of Special Steels Central Iron and Steel Research Institute Co.Ltd.Beijing 100081China

Mo element was added to co.alt-based alloy L605,and co.d forging deformation was *** effects of the addition and co.d forging deformation on the microstructure and mechanical properties of the alloy were studied by thermodynamic calculation,electron backscatter diffraction,transmission electron microsco.y,and X-ray *** stacking fault energy(SFE)of the alloy decreased after the addition,and the formation of stacking faults and intersections were promoted to improve the strength and *** tensile strength of the alloy with Mo increased from 1190 to 1702 MPa after 24%co.d deformation,producing significant work *** strengthening mechanism is strain-induced martensitic transformation(SIMT)and deformation *** alloy,co.bined with Mo and after 24%deformation,had both high strength and ductility in co.parison with the original co.alt-based alloy *** is attributed to the lower SFE which caused the increase in stacking fault *** the tensile process,theε-hcp phase was easily generated at the stacking fault to reduce the stress co.centration and increase the *** SIMT by adjusting the density of stacking faults can improve the mechanical properties of co.alt-based ***ε-hcp phase,the interaction between deformation twins and dislocations,and the interaction between e-hcp phases during co.d forging deformation caused local stress co.centration,lowering ductility and toughness.

关键词： co.alt-based alloy-Stacking fault energy Strain-induced martensitic transformation Deformation twin co.d forging deformation

Ultra reliability and massive co.nectivity provision in integrated internet of military things(IoMT)based on tactical datalink

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Defence Technology（防务技术） 2024年第3期33卷 386-398页

作者： Li Bing Yating Gu Lanke Hu Li Bowen Yang Lihua Jue Wang Yue Yin Northwestern Polytechnical University Xi'an 710072China China Academy of Information and co.munications Technology Beijing 100191China China Intelligent and co.nected Vehicles(beijing)research institute co. LtdBeijing 100176China The 20th research institute of China Electronic Technology Group co.poration Xi’an 710068China Xidian University Xi'an 710071China

One of the major challenges arising in internet of military things(IoMT)is acco.modating massive co.nectivity while providing guaranteed quality of service(QoS)in terms of ultra-high *** this regard,this paper presents a class of co.e-domain nonorthogonal multiple accesses(NOMAs)for uplink ultra reliable networking of massive IoMT based on tactical datalink such as Link-16 and joint tactical information distribution system(JTIDS).In the co.sidered scenario,a satellite equipped with Nr antennas servers K devices including vehicles,drones,ships,sensors,handset radios,*** co.ed modulation,a special form of multiple input multiple output(MIMO)-NOMA is *** discussion starts with evaluating the output signal to interference-plus-noise(SINR)of receiver filter,leading to the unveiling of a closed-form expression for overloading systems as the number of users is significantly larger than the number of devices admitted such that massive co.nectivity is *** expression allows for the development of simple yet successful interference suppression based on power allocation and phase shaping techniques that maximizes the sum rate since it is equivalent to fixed-point programming as can be *** proposed design is exemplified by nonlinear modulation schemes such as minimum shift keying(MSK)and Gaussian MSK(GMSK),two pivotal modulation formats in IoMT standards such as Link-16 and *** results show that near capacity performance is ***,the performance is obtained using simple forward error co.rections(FECs)of higher co.ing rate than existing schemes do,while the transmit power is reduced by 6 *** proposed design finds wide applications not only in IoMT but also in deep space co.munications,where ultra reliability and massive co.nectivity is a keen co.cern.

关键词： Satellite network Deep space co.munications Internet of military things Non-orthogonal multiple access MIMO Link-16 JITDS

Review of Electrical and Electronic Architectures for Autonomous Vehicles:Topologies,Networking and Simulators

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Automotive Innovation 2024年第1期7卷 82-101页

作者： Wenwei Wang Kaidi Guo Wanke Cao Hailong Zhu Jinrui Nan Lei Yu National Engineering research Center of Electric Vehicles Beijing Institute of Technology(BIT)Beijing 100081China Shenzhen Automotive research institute Beijing Institute of Technology(BIT)Shenzhen 518000China State Key Laboratory of Networking and Switching Technology Beijing University of Posts and TelecommunicationBeijing 100876China Purple Mountain Laboratories Nanjing 211111China beijing Kawen New Energy Vehicle co. LTDBeijing 102209China

With the rapid development of autonomous vehicles,more and more functions and co.puting requirements have led to the co.tinuous centralization in the topology of electrical and electronic(E/E)*** certain Tier1 suppliers,such as BOSCH,have previously proposed a serial roadmap for E/E architecture development,implemented since 2015 with significant co.tributions to the automotive industry,lingering misco.ceptions and queries persist in actual engineering ***,there are co.cerns regarding the perspective of zone-oriented E/E architectures,characterized by zonal co.centration,as successors to domain-oriented E/E architectures,known for functional *** these misco.ceptions and queries,this study introduces a novel parallel roadmap for E/E architecture development,co.currently evaluating domain-oriented and zone-oriented ***,the study explores hybrid E/E architectures,amalgamating features from both *** align with the evolution of E/E architectures,networking technologies must adapt *** networking mechanisms pivotal in E/E architecture design are co.prehensively ***,the study delves into modeling and verification tools pertinent to E/E architecture *** co.clusion,the paper outlines existing challenges and unresolved queries in this domain.

关键词： Autonomous vehicles Electrical and electronic architectures Topology Networking Domain-oriented Zone-oriented

Morphological and molecular evidence for natural hybridization between Sorbus pohuashanensis and S. disco.or (Rosaceae)

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Journal of Forestry research 2024年第4期35卷 189-201页

作者： Yuxia Wu Xuedan Yu Wei Tang Wenhua Yang Qidi Fu Yongqi Zheng Chuanhong Zhang State Key Laboratory of Tree Genetics and Breeding Research Institute of ForestryChinese Academy of ForestryBeijing 100091People’s Republic of China beijing Waiyan Online Digital Technology co. LtdBeijing 100081People’s Republic of China Huabanlv Nature Enlightenment Education Technology co. LtdBeijing 100010People’s Republic of China

In overlapping distribution areas of Sorbus pohuashanensis and *** in North China(Mount Tuoliang,Mount Xiling and Mount Baihua),Sorbus indi-viduals were found with pink fruit,which have never been reco.ded for the flora of *** morphological characters co.bined with four chloroplast DNA markers and internal transcribed spacer(ITS)were used to analyze the origin of the Sorbus individuals with pink fruits and their relationship to *** and ***,SDA and one-way(taxon)ANOVA of morphological characters provided co.vincing evidence of the hybrid ori-gin of Sorbus individuals with pink fruits based on a novel morphological character and many intermediate *** analysis based on four cpDNA markers showed that either *** or *** were maternal parents of Sorbus individuals with pink ***-ence of the position of Sorbus individuals with pink fruits between cpDNA and ITS in cluster trees supported by DNA sequence co.parative analysis,implying former hybridiza-tion events between *** and ***-tiple hybridization events between *** and *** might have co.tributed to the generation of Sorbus individuals with pink *** study has provided insights into hybridization between species of the same genus in sympatric areas,which is of great significance for the study of interspecific hybridization.

关键词： Hybridization ITS Chloroplast DNA Morphological characters Sorbus

AB_(2)-type rare earth-based co.pounds with C-15 structure:Looking for reversible hydrogen storage materials

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Journal of Rare Earths 2024年第5期42卷 803-816,I0001页

作者： Hao Shen Junxian Zhang Valerie Paul-Bonco.r Ping Li Zhinian Li Yuanfang Wu Lijun Jiang National Engineering research Center of Nonferrous Metals Materias and Products for New Energy GRINM Group Co.LtdBeijing00088China Univ Paris Est Creteil CNRSICMPEUMR 71822 rue Henri Dunant94320ThiaisFrance institute for Advanced Materials and Technology University of Science and TechnologyBeijing100083China GRIMAT Engineering institute co. Ltd.Beijing101407China

AB_(2)-type(A=rare earth,B=transition metal)intermetallic co.pounds with C15 structure can easily absorb large amount of hydrogen,showing their potential use as hydrogen storage *** crucial problem hindering their application is hydrogen induced amorphization(HIA),which leads to the irreversible hydrogen sorption *** stability of the AB_2 Laves phase co.pounds,the structural properties,the hydrogenation properties and the co.trolling factors of HIA are discussed in this *** with other factors,the atomic radii ratio r_A/r_B is the most important one influencing the ***-element substitution is an efficient way to suppress or limit HIA and may enable AB_2 co.pounds to be suitable for hydrogen storage.

关键词： Rare earth-based AB_2-type co.pounds Hydrogenation properties Hydrogen induced amorphization Elemental substitution

High cerium co.tent(Nd-Pr-Ce)_(2)Fe_(14)B melt-spun ribbons with high co.rcivity

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Journal of Rare Earths 2024年第4期42卷 690-695页

作者： Yujiang Zhong Junming Wang Zikai Yuan Ruijin Liu Minggang Zhu Zhe Liu Xin Chen Wei Li Zhaohui Guo Division of Functional Materials Central Iron and Steel Research InstituteBeijing100081China Ningbo Jinji Strong Magnetic Material co. Ltd.Ningbo315172China Jiangxi Jiangwu Rare Metal New Material co. Ltd.Nanchang330013China

The effects of wheel speeds on the magnetic properties and microstructures of[(Nd,Pr)_(1-x)Ce_(x)]-Fe-B meltspun ribbons were *** to melt-spun ribbons with low cerium(Ce)co.tent(x=0.2),amorphous formation can be suppressed at high wheel speed in the ribbons with a relatively high Ce co.tent(x=0.8),and with the increase of the wheel speed,the magnetic properties of the ribbons with high Ce co.tent raise *** high wheel speed,the co.rcivity mechanism of melt-spun ribbons is mainly pinning field,and the high wheel speed introduces a large number of defects into the matrix as pinning ***,ribbons with high Ce co.tent form a fine and uniform grain structure,so the grain boundary area enlarges,which further hinders the movement of domain *** co.bined effects of the above factors enable ribbons with high Ce co.tent to have excellent magnetic properties(Hcj=0.977 T,Mr=64 m^(2) A/kg)at the wheel speed of 35 m/s.

关键词： Wheel speed Ceco.tent Microstructure Magnetic properties Rare earths

Development of Superhydrophobic Nano-SiO_(2)and Its Field Application in Low-permeability,High-temperature,and High-salinity Oil Reservoirs

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China Petroleum Processing & Petrochemical Technology 2024年第3期26卷 1-14页

作者： Qin Bing Gao Min Lei Xue Zhao Lin Zhu Qizhi Meng Fanbin Jiang Jianlin SINOPEC research institute of Petroleum Processing co. LtdBeijing 100083China

In this study,to meet the stringent requirements on the hydrophobicity of nano-SiO_(2)particles for use in depressurization and enhanced injection operations in high-temperature and high-salinity oil reservoirs,seco.dary chemical grafting modification of nano-SiO_(2)is performed using a silane co.pling agent to prepare superhydrophobic nano-SiO2 *** these superhydrophobic nano-SiO_(2)particles as the co.e agent,and liquid paraffin or diesel as the dispersion medium,a uniform dispersion of nano-SiO_(2)particles is achieved under high-speed stirring,and a chemically enhanced water injection system with co.loidal stability that can be maintained for more than 60 d is successfully *** this system,a field test of depressurization and enhanced injection is carried out on six wells in an oilfield,and the daily oil production level is increased by 11 *** cumulative increased water injection is 58784 m^(3),the effective rate of the measures was 100%,and the average validity period is 661 d.

关键词： nano-SiO_(2)particle hydrophobic modification enhanced injection operation low-grade reservoir low permeability oilfield

Cross-Modal co.sistency with Aesthetic Similarity for Multimodal False Information Detection

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co.puters, Materials & co.tinua 2024年第5期79卷 2723-2741页

作者： Weijian Fan Ziwei Shi State Key Laboratory of Media co.vergence and co.munication Communication University of ChinaBeijing100024China Software research institute China United Network Communication Group Co.Ltd.Beijing100024China

With the explosive growth of false information on social media platforms, the automatic detection of multimodalfalse information has received increasing attention. Recent research has significantly co.tributed to multimodalinformation exchange and fusion, with many methods attempting to integrate unimodal features to generatemultimodal news representations. However, they still need to fully explore the hierarchical and co.plex semanticco.relations between different modal co.tents, severely limiting their performance detecting multimodal falseinformation. This work proposes a two-stage detection framework for multimodal false information detection,called ASMFD, which is based on image aesthetic similarity to segment and explores the co.sistency andinco.sistency features of images and texts. Specifically, we first use the co.trastive Language-Image Pre-training(CLIP) model to learn the relationship between text and images through label awareness and train an imageaesthetic attribute sco.er using an aesthetic attribute dataset. Then, we calculate the aesthetic similarity betweenthe image and related images and use this similarity as a threshold to divide the multimodal co.relation matrixinto co.sistency and inco.sistencymatrices. Finally, the fusionmodule is designed to identify essential features fordetectingmultimodal false information. In extensive experiments on four datasets, the performance of the ASMFDis superior to state-of-the-art baseline methods.

关键词： Social media false information detection image aesthetic assessment cross-modal co.sistency