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High-efficiency co.(2) sequestration through direct aqueous carbonation of carbide slag: determination of carbonation reaction and optimization of operation parameters

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Frontiers of Environmental Science & Engineering 2024年第1期18卷 157-167页

作者： Zhiqiang Wang Longpeng Cui Yanfang Liu Jili Hou Hongwei Li Liang Zou Fuxia Zhu Department of co.l and Syngas co.version Sinopec Research Institute of Petroleum Processing Co.Ltd.Beijing 100083China

Under the dual-carbon target, co.(2) mineralization through solid wastes presents a mutually beneficial approach for permanent carbon emission reduction at a low material co.t, while also enabling the resource utilization of these wastes. However, despite its potential, a co.prehensive understanding about the effect of industrial solid waste properties and operating parameters on the carbonation process, and the mechanism of direct aqueous carbonation is still lacking. A series of experiments were co.ducted to co.pare the carbonation performance of fly ash, steel slag, and carbide slag. Subsequently, co.(2) mineralization by carbide slag was systematically studied under various operating parameters due to its high co.(2) sequestration capacity. Results showed the reactivity of CaO and Ca(OH)2 was higher than that of CaO·SiO_(2) and 2CaO·SiO_(2). Carbide slag demonstrated a sequestration capacity of 610.8 g co.(2)/kg and carbonation efficiency ζCa of 62.04% under the co.ditions of 65 ℃, 1.5 MPa initial co.(2) pressure, 15 mL/g liquid-to-solid ratio, and 200 r/min stirring speed. Moreover, the formation of carbonates was co.firmed through XRD, SEM-EDS, TG, and FTIR. A mechanism analysis revealed that initially, the rate of the carbonation process was primarily co.trolled by the mass transfer of co.(2) in the gas–liquid interface. However, the rate-determining step gradually shifted to the mass transfer of Ca2+ in the solid–liquid interface as the reaction time increased. This study lays the foundation for the large-scale implementation of co.(2) sequestration through carbide slag carbonation.

关键词： Industrial by-products Direct aqueous carbonation co.(2)sequestration Mass transfer

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Properties and microstructure of co.per–titanium alloys with magnesium additions

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Rare Metals 2024年第5期43卷 2290-2299页

作者： Lue Huang Li-Jun Peng Jiang Li Xu-Jun Mi Gang Zhao Guo-Jie Huang Hao-Feng Xie Yi-Cheng Cao Wen-Jing Zhang Zhen Yang State Key Laboratory of Nonferrous Metals and Processes GRINM Group Co.Ltd.Beijing 100088China GRIMAT Engineering institute co. LtdBejing 101407China School of Materials Science and Engineering Northeastern UniversityShenyang110000China General research institute for Nonferrous Metals Beijing 100088China China Academy of Space Technology Beijing 100094China China Nonferrous Metals Mining Group(Tianjin)co.Ltd Tianjin 3001llChina

The volume fractions and morphology of precipitates in precipitation-strengthened Cu-Ti alloys,which precipitate mainly as co.tinuous and disco.tinuous precipitates,are important for the application of the *** study employed hardness and electrical co.ductivity tests transmission electron microsco.y(TEM),atom probe tomography(APT),and first-principles calculations to demonstrate that the addition of Mg is effective for accelerating nanosized co.tinuousβ'-Cu_(4)Ti precipitation as well as for suppressing the precipitation of co.rse lamellar disco.tinuousβ-Cu_(4)Ti precipitates along the grain boundaries,resulting in Cu-Ti alloys with high yield strength and good electrical *** results showed that the co.tinuous precipitation ofβ'-Cu_(4)Ti was accelerated by the Mg additions,which reduced the supersaturation of the matrix,thereby reducing the chemical driving force for the disco.tinuous *** the other hand,Mg additions increased the mismatch between the disco.tinuousβ-Cu_(4)Ti precipitates and matrix decreased the nucleation rate of the disco.tinuous precipitates,and increased the spacing of the disco.tinuous precipitation layer,resulting in a lower growth rate of the disco.tinuous ***,the addition of Mg to Cu-Ti alloys enhances the strength and improves the resistance to over-ageing.

关键词： Cu-Ti-Mg alloy Precipitation hardening Disco.tinuous precipitation co.tinuous precipitation Microstructure formation mechanism

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Enteroco.cus faecalis provides protection during scavenging in carrion crow (co.vus co.one)

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Zoological research 2024年第3期45卷 451-463页

作者： Bin Hu Jia-Min Wang Qing-Xun Zhang Jing Xu Ya-Nan Xing Bo Wang Shu-Yi Han Hong-Xuan He CAS Key Laboratory of Animal Eco.ogy and co.servation Biology Institute of ZoologyChinese Academy of SciencesBeijing 100101China co.lege of Life Sciences University of Chinese Academy of SciencesBeijing 100049China beijing Milu Eco.ogical research Center Beijing 102600China beijing Capital International Airport co. Ltd.Beijing 101300China

The gut microbiota significantly influences host physiology and provides essential eco.ystem *** diet can affect the co.position of the gut microbiota,the gut microbiota can also help the host adapt to specific dietary *** carrion crow(co.vus co.one),an urban facultative scavenger bird,hosts an abundance of pathogens due to its scavenging *** this,carrion crows infrequently exhibit illness,a phenomenon related to their unique physiological *** present,however,the role of the gut microbiota remains inco.pletely *** this study,we performed a co.parative analysis using 16S rRNA amplico. sequencing technology to assess co.onic co.tent in carrion crows and 16 other bird species with different diets in beijing,*** findings revealed that the dominant gut microbiota in carrion crows was primarily co.posed of Proteobacteria(75.51%)and Firmicutes(22.37%).Significant differences were observed in the relative abundance of Enteroco.cus faecalis among groups,highlighting its potential as a biomarker of facultative scavenging behavior in carrion ***,*** isolated from carrion crows was transplanted into model mice to explore the protective effects of this bacterial co.munity against Salmonella enterica *** showed that *** down-regulated the expression of pro-inflammatory cytokines tumor necrosis factor alpha(TNF-α),interferon gamma(IFN-γ),and interleukin 6(IL-6),prevented *** co.onization,and regulated the co.position of gut microbiota in mice,thereby modulating the host’s immune regulatory ***,*** exerts immunoregulatory and anti-pathogenic functions in carrion crows engaged in scavenging behavior,offering a representative case of how the gut microbiota co.tributes to the protection of hosts with specialized diets.

关键词： Carrion crow Facultative scavenger Gut microbiota Enteroco.cus faecalis 16S rRNA sequencing

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Clinico.athological significance and immunotherapeutic outco.e of claudin 18.2 expression in advanced gastric cancer:A retrospective study

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Chinese Journal of Cancer research 2024年第1期36卷 78-89页

作者： Changsong Qi Xiaoyi Chong Ting Zhou Mingyang Ma Jifang Gong Miao Zhang Jian Li Jun Xiao Xiaohui Peng Zhen Liu Zonghai Li Lin Shen Xiaotian Zhang State Key Laboratory of Holistic Integrative Management of Gastrointestinal Cancers Beijing Key Laboratory of Carcinogenesis and Translational ResearchDepartment of Gastrointestinal OncologyPeking University Cancer Hospital&InstituteBeijing 100142China Key Laboratory of Carcinogenesis and Translational research(Ministry of Education/beijing) Department of Gastrointestinal OncologyPeking University Cancer Hospital&InstituteBeijing 100142China CARsgen Therapeutics co. LtdShanghai 200231China CARsgen Life Sciences co. LtdShanghai 200131China

Objective: Immunotherapeutic outco.es and clinical characteristics of claudin 18 isoform 2 positive(CLDN18.2-positive) gastric cancer(GC) vary in different clinical studies, making it difficult to optimize antiCLDN18.2 therapy. We co.ducted a retrospective analysis to explore the association of CLDN18.2 expression with clinico.athological characteristics and immunotherapeutic outco.es in ***: A total of 536 advanced GC patients from 2019 to 2021 in the CT041-CG4006 and CT041-ST-01clinical trials were included in the analysis. CLDN18.2 expression on ≥40% of tumor cells(2+, 40%) and CLDN18.2 expression on ≥70% of tumor cells(2+, 70%) were co.sidered the two levels of positively expressed GC. The clinico.athological characteristics and immunotherapy outco.es of GC patients were analyzed acco.ding to CLDN18.2 expression ***: CLDN18.2 was expressed in 57.6%(cut-off: 2+, 40%) and 48.9%(cut-off: 2+, 70%) of *** death-ligand 1(PD-L1) and CLDN18.2 were co.expressed in 19.8% [co.bined positive sco.e(CPS)≥1, CLDN18.2(cut-off: 2+, 40%)] and 17.2% [CPS≥5, CLDN18.2(cut-off: 2+, 70%)] of ***18.2 expression positively co.related with younger age, female sex, non-gastroesophageal junction(nonGEJ), and diffuse phenotype(Pco.mon in CLDN18.2-positive GC. Overall survival and immunotherapy-related progression-free survival(ir PFS) were inferior in the CLDN18.2-positive ***: CLDN18.2-positive GC is associated with poor prognosis and worse immunotherapeutic outco.es. The co.bination of anti-CLDN18.2 therapy, anti-PD-L1/PD-1 therapy, and chemotherapy for GC requires further investigation.

关键词： Gastric cancer claudin18.2 CT041 PD-L1 immunotherapy

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Material-SAM:Adapting SAM for Material XCT

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co.puters, Materials & co.tinua 2024年第3期78卷 3703-3720页

作者： Xuelong Wu Junsheng Wang Zhongyao Li Yisheng Miao Chengpeng Xue Yuling Lang Decai Kong Xiaoying Ma Haibao Qiao School of Materials Science and Engineering Beijing Institute of TechnologyBeijing100081China Senior Engineer at the Simulation Center Citic Dicastal Co.Ltd.Qinhuangdao066010China

X-ray co.puted Tomography(XCT)enables non-destructive acquisition of the internal structure of materials,and image segmentation plays a crucial role in analyzing material XCT *** paper proposes an image segmentation method based on the Segment Anything model(SAM).We co.structed a dataset of carbide in nickel-based single crystal superalloys XCT images and preprocessed the images using median filtering,histogram equalization,and gamma ***,SAM was fine-tuned to adapt to the task of material XCT image segmentation,resulting in *** co.pared the performance of threshold segmentation,SAM,U-Net model,and *** method achieved 88.45%Class Pixel Accuracy(CPA)and 88.77%Dice Similarity co.fficient(DSC)on the test set,outperforming SAM by 5.25%and 8.81%,respectively,and achieving the highest ***-SAM demonstrated lower input requirements co.pared to SAM,as it only required three reference points for co.pleting the segmentation task,which is one-fifth of the requirement of ***-SAM exhibited promising results,highlighting its potential as a novel method for material XCT image segmentation.

关键词： Segment Anything model X-ray co.puted tomography U-Net Ni-based superalloys foundation models

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Theory,technology and application of grouted bolting in soft rock roadways of deep co.l mines

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International Journal of Minerals,Metallurgy and Materials 2024年第7期31卷 1463-1479页

作者： Hongpu Kang Jianwei Yang Pengfei Jiang Fuqiang Gao Wenzhou Li Jiafeng Li Huiyuan Chen co.l Mining research institute China Coal Technology and Engineering Group Co.Ltd.Beijing 100013China co.l Mining Branch China Coal Research InstituteBeijing 100013China State Key Laboratory of Intelligent Mining and Strata co.trol Beijing 100013China

The grouted bolt,co.bining rock bolting with grouting techniques,provides an effective solution for co.trolling the surrounding rock in deep soft rock and fractured *** has been extensively applied in numerous deep mining areas characterized by soft rock roadways,where it has demonstrated remarkable co.trol *** article systematically explores the evolution of grouted bolting,co.ering its theoretical foundations,design methods,materials,co.struction processes,monitoring measures,and methods for assessing its *** overview enco.passed several key elements,delving into anchoring theory and grouting reinforcement *** new principle of high pretensioned high-pressure splitting grouted bolting co.laborative active co.trol is introduced.A fresh method for dynamic information design is also *** discussion touches on both co.ventional grouting rock bolts and cable bolts,as well as innovative grouted rock bolts and cables characterized by their high pretension,strength,and sealing hole *** examination of the merits and demerits of standard inorganic and organic grouting materials versus the new inorganic–organic co.posite materials,including their specific application co.ditions,was ***,the article presents various methods and instruments to assess the support effect of grouting rock bolts,cable bolts,and grouting ***,it provides a foundation for understanding the factors influencing decisions on grouted bolting timing,the sequence of grouting,the pressure applied,the volume of grout used,and the strategic arrangement of grouted rock bolts and cable *** application of the high pretensioned high-pressure splitting grouted bolting co.laborative co.trol technology in a typical kilometer-deep soft rock mine in China—the soft co.l seam and soft rock roadway in the Kouzidong co.l mine,Huainan co.l mining area,was ***,the existing problems in grouted bolting co.trol

关键词： deep co.l mine soft rock roadway grouted bolting rock bolt and cable grouting material high-pressure splitting grouting co.laborative co.trol technology

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Effect of electroacupuncture at Neiguan(PC6)at different time points on myocardial ischemia reperfusion arrhythmia in rats

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Journal of Traditional Chinese Medicine 2024年第1期44卷 113-121页

作者： SUN Qianhui CHENG Kai DAI Xingye YANG Zhiwen WU Xiaoling XU Chang QIU Xinghua GAO Xiaofeng LIU Daonan YANG Qirui School of Acupuncture and Tuina Beijing University of Chinese MedicineBeijing 100029China beijing MedEx Technology co. Ltd.Beijing 100029China

OBJECTIVE:To observe the effects of electroacupuncture at Neiguan(PC6)at different time points on reperfusion arrhythmia(RA)after myocardial ischemia and reperfusion in rats,and to investigate the co.relation of this protective effect with nerve growth factor(NGF),tyrosine kinase A(Trk A),tyrosine hydroxylase(TH),and norepinephrine(NE).METHODS:A total of 72 Sprague-Dawley male rats were randomly divided into six groups(n=12 rats/group):normal group(Norm),sham operation group(Sham),ischemia reperfusion group(I/R),pre-ischemic electroacupuncture group(EAI),pre-reperfusion electroacupuncture group(EAII),post-reperfusion electroacupuncture group(EAIII).The myocardial ischemia-reperfusion injury(MIRI)model was induced by occlusion of left anterior descending co.onary artery for 20 min followed by reperfusion for 40 min in *** no intervention in the Norm group and only threading without ligation in the Sham *** pretreatment at 20 min/d for 7 d before ligation in the EAⅠgroup,20 min of electroacupuncture before reperfusion in the EAII group and 20 min of electroacupuncture after reperfusion in the EAIII *** electrocardiogram(ECG)of each group was reco.ded throughout the whole process,and the success of the MIRI model was determined based on the changs of J-point and T-wave in the *** arrhythmia sco.e was used to reco.d premature ventricular co.tractions,ventricular tachycardia and ventricular fibrillation during the reperfusion period to assess the reperfusion induced *** expression levels of NGF,Trk A,TH protein were measured by Western ***,the expression levels of plasma and myocardial NE levels were detected by enzyme linked immunosorbent ***:The differences between Norm group and Sham group were not statistically significant in all *** sco.e,myocardial NGF,Trk A,TH,and NE expression were significantly higher in the I/R group co.pared with the Sham *** sco.e,myocardial NGF,T

关键词： myocardial reperfusion injury reperfusion arrhythmia electroacupuncture point PC6(Neiguan) nerve growth factor protein-tyrosine kinases norepinephrine

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A new fluorocarbon adhesive:Inhibiting agglomeration during co.bustion of propellant via efficient F-Al2O3 preignition reaction

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Carbon Energy 2024年第6期6卷 292-305页

作者： Qifa Yao Min Xia Chao Wang Fanzhi Yang Wei Yang Yunjun Luo School of Materials Science and Engineering Beijing Institute of TechnologyBeijingChina Key Laboratory of High Energy Density Materials Ministry of EducationBeijing Institute of TechnologyBeijingChina School of Aerospace Engineering Beijing Institute of TechnologyBeijingChina Advanced research institute of Multidisciplinary Science Beijing Institute of TechnologyBeijingChina

Inhibiting the agglomeration of molten aluminum particles packed in the binder network is a promising scheme to achieve efficient co.bustion of solid *** this investigation,the hydroxyl-terminated structured fluorinated alco.ol co.pound(PFD)was introduced to modify the traditional polyethylene glyco./polytetrahydrofuran block co.olymerization(HTPE)binder;that is,a unique fluorinated polyether(FTPE)binder was synthesized by embedding fluorinated organic segments into the HTPE binder via crosslinking *** FTPE was applied in aluminum-based propellants for the first *** to the co.plete release of fluorinated organic active segments in the range of 300℃to 400℃,the burning rate of FTPEbased propellant increased from 4.07(0%PFD)to 6.36 mm/s(5%PFD),increased by 56.27%under 1 *** reaction heat of FTPE propellants increased from 5.95(0%PFD)to 7.18 MJ/kg(5%PFD)under 3.0 MPa,indicating that HTPE binder modified with PFD would be co.ducive to inhibiting the D90 of co.densed co.bustion products(CCPs)dropped by 81.84%from 75.46(0%PFD)to 13.71μm(5%PFD)under 3.0 MPa,in co.sistent with the significant reduction of aluminum agglomerates observed on the quenched burning surface of the *** results demonstrated that a novel FTPE binder with PFD can release fluorinated organic active segments,which motivate preignition reaction with the alumina shell in the early stage of aluminum co.bustion,and then enhance the melting diffusion effect of aluminum to inhibit the agglomeration.

关键词： agglomeration characteristics aluminum particles co.bustion fluorine alco.ol co.pounds HTPE propellants

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Tunnel bottleneck management with high-occupancy vehicle priority on intelligent freeways

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Transportation Safety and Environment 2024年第2期6卷 87-95页

作者： Jinyong Gao Juncheng Zeng Xinyuan Wang Cheng Zhou Hailin Zhang Jintao Lai Fujian Express way Group co. LtdFuzhou 350000FujianChina Fujian Express way Science&Technology Innovation research institute co. LtdFuzhou 350000FujianChina beijing Baidu Netco. Science Technology co. LtdBeijing 100000China Key Laboratory of Road and Traffic Engineering of the Ministry of Education Tongji UniversityShanghai 201804China

Tunnels on freeways,as one of the critical bottlenecks,frequently cause severe co.gestion and passenger *** solve the tunnel bottleneck problem,most of the existing research can be divided into two *** is to adopt variable speed limits(VSLs)to regulate a predetermined speed for vehicles to get through a bottleneck *** other is to adopt high-occupancy vehicle(HOV)lane *** HOV lane management strategies,all traffic is divided into HOVs and low-occupancy vehicles(LOVs).HOVs are vehicles with a driver and one or more *** are vehicles with only a *** kind of research can grant priority to HOVs by providing a dedicated HOV ***,the existing research cannot both mitigate co.gestion and maximize passenger-oriented *** address the research gap,this paper leverages co.nected and automated vehicle(CAV)technologies on intelligent freeways and develops a tunnel bottleneck management strategy with a dynamic HOV lane(DHL).The strategy bears the following features:1)enables tunnel bottleneck management at a microsco.ic level;2)maximizes passenger-oriented benefits;3)grants priority to HOVs even when the HOV lane is open to LOVs;4)allocates right-of-way segments for HOVs and LOVs in real time;and 5)performs well in a mixed-traffic *** proposed strategy is evaluated through co.parison against the non-co.trol baseline and a VSL *** analysis is co.ducted under different co.gestion levels and penetration *** results demonstrate that the proposed strategy outperforms in terms of passenger-oriented delay reduction and HOVs’priority level improvement.

关键词： tunnel bottleneck high-occupancy vehicle(HOV) intelligent freeways right-of-way segment

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Advanced System-Level Model Reduction Method for Multi-co.verter DC Power Systems

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CSEE Journal of Power and Energy Systems 2024年第4期10卷 1550-1562页

作者： Lin Zhu Xueshen Zhao Xialin Li Li Guo Bo Zhao Zhanfeng Deng Hao Lu Chengshan Wang the Key Laboratory of Smart Grid of Ministry of Education Tianjin UniversityTianjin 300072China the research institute of State Grid Zhejiang Electric Power co. Ltd.Hangzhou 310014China the State Grid Global Energy Interco.nection research institute Beijing 102209China

For dynamic stability analysis and instability mechanism understanding of multi-co.verter medium voltage DC power systems with droop-based double-loop co.trol,an advanced system-level model reduction method is *** this method,mathematical relationships of co.trol parameters(e.g.,current and voltage co.trol parameters)between the system and its equivalent reduced-order model are ***,open-loop and closed-loop equivalent reduced-order models of current co.trol loop co.sidering dynamic interaction among co.verters are *** instability mechanism(e.g.,unreasonable current co.trol parameters)of the system can be revealed *** guidance for adjustment of current co.trol parameters can also be ***,co.sidering dynamic interaction of current co.trol among co.verters,open-loop and closed-loop equivalent reduced-order models of voltage co.trol loop are *** frequency and damping factor of DC bus voltage in a wide oscillation frequency range(e.g.,10–50 Hz)can be evaluated *** importantly,accuracy of advanced system-level model reduction method is not co.promised,even for MVDC power systems with inco.sistent co.trol parameters and different number of ***,experiments in RT-BOX hardware-in-the-loop experimental platform are co.ducted to validate the advanced system-level model reduction method.

关键词： Closed-loop reduced-order model instability mechanism open-loop reduced-order model stability analysis system-level model reduction method

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