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Study of the reaction mechanism for preparing powdered activated coke with SO_(2)adsorption capability via one-step rapid activation method under flue gas atmosphere

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Chinese Journal of Chemical Engineering 2024年第1期65卷 158-168页

作者： Binxuan Zhou Jingcai Chang Jun Li Jinglan Hong Tao Wang Liqiang Zhang Ping Zhou Chunyuan Ma School of Environmental Science and Engineering Shandong UniversityQingdao 266237China School of Energy and Power Engineering Shandong UniversityJinan 250061China Weihai Research institute of Industrial Technology of shandong University Weihai 264209China

In this study,the impact of different reaction times on the preparation of powdered activated carbon(PAC)using a one-step rapid activation method under flue gas atmosphere is investigated,and the underlying reaction mechanism is *** indicate that the reaction process of this method can be divided into three stages:stage I is the rapid release of volatiles and the rapid consumption of O_(2),primarily occurring within a reaction time range of 0-0.5 s;stage II is mainly the continuous release and diffusion of volatiles,which is the carbonization and activation coupling reaction stage,and the carbonization process is the main in this *** stage mainly occurs at the reaction time range of 0.5 -2.0 s when SL-coal is used as material,and that is 0.5-3.0 s when JJ-coal is used as material;stage III is mainly the activation stage,during which activated components diffuse to both the surface and interior of *** stage mainly involves the reaction stage of CO_(2)and H2O(g)activation,and it mainly occurs at the reaction time range of 2.0-4.0 s when SL-coal is used as material,and that is 3.0-4.0 s when JJ-coal is used as ***,the main function of the first two stages is to provide more diffusion channels and contact surfaces/activation sites for the diffusion and activation of the activated components in the third *** the reaction mechanism would serve as a crucial reference and foundation for designing the structure,size of the reactor,and optimal positioning of the activator nozzle in PAC preparation.

关键词： Reaction mechanism Powdered activated coke preparation SO_(2)adsorption One-step rapid activation Flue gas atmosphere

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Establishment and Validation of a Four-stress Granule-related Gene Signature in Hepatocellular Carcinoma

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Journal of Clinical and Translational Hepatology 2024年第1期12卷 1-14页

作者： Mengzhu Li Xiude Fan Jiajun Zhao Dawei Wang Department of Endocrinology Shandong Provincial HospitalShandong UniversityJinanShandongChina Key Laboratory of Endocrine Glucose&Lipids Metabolism and Brain Aging Ministry of EducationDepartment of EndocrinologyShandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinanShandongChina shandong Key Laboratory of Endocrinology and Lipid Metabolism JinanShandongChina shandong institute of Endocrine and Metabolic Diseases JinanShandongChina

Background and Aims:Stress granules(SGs)as membrane-less cytoplasmic foci formed in response to unfavorable external stimuli could promote cancer cells to adapt to hostile *** carcinoma(HCC)is prone to be highly aggressive once diagnosed,which markedly reduces patient survival ***,it is crucial to develop valid diagnostic markers to prognosticate HCC patient prognosis,which promotes individualized precision therapeutics in *** the pro-tumorigenic activity of SGs,it is of great potential value to construct a prognostic tool for HCC based on the expression profiles of SG-related genes(SGGs).Methods:Bioinformatic analysis was employed to establish an SGG-based prognostic *** blotting and realtime polymerase chain reaction assays were used to assess the expression patterns of the related ***-of-function experiments were performed to analyze the effect of the SGGs on SG formation and cell ***:A four-SGG signature(KPNA2,MEX3A,WDR62,and SFN)targeting HCC was established and validated to exhibit a robust performance in predicting HCC ***,all four genes were further found to be highly expressed in human HCC *** important,we demonstrated that individually knocking down the four SGGs significantly reduced HCC cell proliferation and metastasis by compromising the SG formation ***:We developed an SGG-based predictive signature that can be used as an independent prognostic tool for *** strong predictive power of this signature was further elucidated by the carcinogenic activity of KPNA2,MEX3A,WDR62,and SFN in HCC cells by regulating SG formation.

关键词： Hepatocellular carcinoma Stress granules Prognostic factor G3BP1

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In Situ Raman Monitoring of Trace Antibiotics in Different Harsh Water Environments

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Energy & Environmental Materials 2024年第1期7卷 284-293页

作者： Chundong Liu Fengcai Lei Maogang Gong Xiaoming Zhou Xiaofei Zhao Zhen Li Chao Zhang Baoyuan Man Jing Yu School of Physics and Electronics Institute of Materials and Clean EnergyShandong Normal UniversityJinan 250014China College of Chemistry Chemical Engineering and Materials ScienceInstitute of Biomedical SciencesShandong Normal UniversityJinan 250014China Department of Physics and Astronomy University of KansasLawrenceKansas 66045USA shandong Provincial Hospital Shandong First Medical UniversityJinan 250021China

In situ surface-enhanced Raman scattering(SERS)is a widely used operando analytical technique,while facing numerous complex factors in applications under aqueous environment,such as low detection sensitivity,poor anti-interference capability,etc.,resulting in unreliable *** address these issues,herein a new hydrophobic SERS strategy has been *** comprehensively designing and researching a SERS-active structure of superhydrophobic ZnO/Ag nanowires,we demonstrate that hydrophobicity can not only draw analytes from water onto substrate,but also adjust"hottest spot"from the bottom of the nanowires to the *** a result,the structure can simultaneously concentrate the dispersed molecules in water and the enhanced electric field in structure into a same zone,while perfecting its own anti-interference *** underwater in situ analytical enhancement factor of this platform is as high as 1.67×10^(11),and the operando limited of detection for metronidazole(MNZ)reaches to 10^(-9)*** importantly,we also successfully generalized this structure to various real in situ detection scenarios,including on-site detection of MNZ in corrosive urine,real-time warning of wrong dose of MNZ during intravenous therapy,in situ monitoring of MNZ in flowing wastewater with particulate interference,etc.,demonstrating the great application potential of this hydrophobic *** work realizes a synergistic promotion for in situ SERS performance under aqueous environment,and also provides a novel view for improving other in situ analytical techniques.

关键词： antibiotic detection hydrophobic structure In situ Raman metronidazole wettability

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Improving the underwater navigation performance of an IMU with acoustic long baseline calibration

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Satellite Navigation 2024年第1期5卷 224-239页

作者： Paipai Wu Wenfeng Nie Yangfan Liu Tianhe Xu shandong Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment Institute of Space SciencesShandong UniversityWeihai264209ShandongChina Research Group of Astronomy and Geomatics(gAGE) Universitat Politecnica de Catalunya(UPC)BarcelonaSpain

Underwater acoustic Long-Baseline System(LBL)is an important technique for submarine positioning and ***,the high cost of the seafloor equipment and complex construction of a seafloor network restrict the distribution of the LBL within a small area,making an underwater vehicle difficult for long-distance and high-precision acoustic-based or inertial-based *** therefore propose an acoustic LBL-based Inertial Measurement Unit(IMU)calibration *** the underwater vehicle can receive the acoustic signal from a seafloor beacon,the IMU is precisely calibrated to reduce the cumulative error of Strapdown Inertial Navigation System(SINS).In this way,the IMU is expected to maintain a certain degree of accuracy by relying solely on SINS when the vehicle reaches out the range of the LBL network and cannot receive the acoustic *** present the acoustic LBL-based IMU online calibration model and analyze the factors that affect the accuracy of IMU *** results fulfill the expectation that the gyroscope bias and accelerometer bias are the main error sources that affect the divergence of SINS position errors,and the track line of the underwater vehicle directly affects the accuracy of the calibration *** addition,we deduce that an optimal calibration trajectory needs to consider the effects of the three-dimensional observability and position dilution of *** the experiment,we compare the effects of seven calibration trajectories:straight and diamond-shaped with and without the change of depth,and three sets of curves with the change of depth:circular,S-shaped,and *** them,we find that the figure-eight is the optimal trajectory for acoustic LBL-based IMU online *** take the maintenance period during which the accumulated SINS Three Dimensional(3D)position errors are below 1 km to evaluate the calibration *** filed experimental results show that for the Micro-electromechanical System

关键词： Acoustic LBL Online IMU calibration SINS Relay reference network

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Enhanced piezoelectricity of Cu-doped K(Ta,Nb)O_(3) single crystals

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Journal of Materiomics 2024年第5期10卷 1017-1025页

作者： Fulin Zhang Songtao Fan Yingxu Zhu Wendie Chen Bing Liu Yuguo Yang Limei Zheng Yuanyuan Zhang Xianshun Lv Xuping Wang Advanced Materials institute Qilu University of Technology(Shandong Academy of Sciences)Jinan250014China Qilu University of Technology(shandong Academy of Sciences) Advanced Materials InstituteKey Laboratory of Light Conversion Materials and Technology of Shandong Academy of SciencesJinan250014China School of Physics Shandong UniversityJinan250100China

As a class of solid solution material,K(Ta,Nb)O3(KTN)single crystals have attracted significant interest due to their excellent piezoelectric and electro-optic *** this study,the piezoelectric properties of KTN were improved through Cu *** the advantages of composition-regulating phase transition,a large,high-quality Cu:KTN crystal measuring 30 mm×25 mm×20 mm in size was grown using the improved top seeded solution growth ***-doped KTN exhibited better piezoelectric properties than pure KTN,and the full matrix parameters were *** dielectric,piezoelectric,and electromechanical coupling responses(ε^(T)_(11)-2,136,d_(33)∼303 pC/N,k_(t)∼0.515,and k33∼0.672)were successfully *** realize the optimized orientation of the piezoelectric properties,the orientation dependence of the single domain properties was investigated,and the mechanism of Cu doping to improve piezoelectric properties was *** found that 0.36%(in mass)Cu doped crystal consisted of A-site substitution,following ferroelectric and domain *** small ferroelectric domain sizes led to a large domain wall mobility rate and high domain wall density,which contributed to high piezoelectric *** work revealed the effect of A-position doping on piezoelectric properties and provided a theoretical and experimental foundation for the performance optimization of KTN-based materials.

关键词： Solid solution material Lead-free piezoelectric Enhanced piezoelectricity

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Influence of substrate effect on near-field radiative modulator based on biaxial hyperbolic materials

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Chinese Physics B 2024年第4期33卷 56-64页

作者：刘睿一刘皓佗胡杨崔峥吴小虎 institute of Advanced Technology Shandong UniversityJinan 250061China shandong institute of Advanced Technology Jinan 250100China School of Power and Energy Northwestern Polytechnical UniversityXi'an 710072China

Relative rotation between the emitter and receiver could effectively modulate the near-field radiative heat transfer(NFRHT)in anisotropic *** to the strong in-plane anisotropy,natural hyperbolic materials can be used to construct near-field radiative modulators with excellent modulation ***,in practical applications,natural hyperbolic materials need to be deposited on the substrate,and the influence of substrate on modulation effect has not been studied *** this work,we investigate the influence of substrate effect on near-field radiative modulator based onα-MoO_(3).The results show that compared to the situation without a substrate,the presence of both lossless and lossy substrate will reduce the modulation contrast(MC)for different film *** the real or imaginary component of the substrate permittivity increases,the mismatch of hyperbolic phonon polaritons(HPPs)weakens,resulting in a reduction in *** reducing the real and imaginary components of substrate permittivity,the MC can be significantly improved,reaching 4.64 forε_(s)=3 at t=10 *** work indicates that choosing a substrate with a smaller permittivity helps to achieve a better modulation effect,and provides guidance for the application of natural hyperbolic materials in the near-field radiative modulator.

关键词： near-field radiative modulator substrate effect hyperbolic material modulation contrast

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Enhanced nitrite electroreduction to ammonia via interfacial dual-site adsorption

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Journal of Energy Chemistry 2024年第9期96卷 328-335页

作者： Xiaokang Chen Shengliang Zhai Yi Tan Le Su Dong Zhai Wei-Qiao Deng Hao Wu institute of Frontier Chemistry School of Chemistry and Chemical EngineeringShandong UniversityQingdao 266071ShandongChina College of Physics and Information Engineering Shanxi Normal UniversityTaiyuan 030031ShanxiChina Suzhou Research institute of shandong University Suzhou 215123JiangsuChina

The nitrite(NO_(2)^(−))to ammonia(NH3)electroreduction reaction(NO_(2)^(−)RR)would be impeded by sluggish proton-coupled electron transfer kinetics and competitive hydrogen evolution reaction(HER).A key to improving the NH_(3) selectivity is to facilitate adsorption and activation of NO_(2)^(−),which is generally undesirable in unitary *** this work,an efficient NO_(2)^(−)RR catalyst is constructed by cooperating Pd with In2O3,in which NO_(2)^(−)could adsorb on interfacial dual-site through“Pd–N–O–In”linkage,leading to strengthened NO_(2)^(−)adsorption and easier N=O bond cleavage than that on unitary Pd or ***,the Pd/In_(2)O_(3)composite exhibits moderate H^(*)adsorption,which may facilitate protonation kinetics while inhibiting competitive *** a result,it exhibits a fairly high NH_(3)yield rate of 622.76 mmol h^(−1)g^(−1)cat with a Faradaic efficiency(FE)of 95.72%,good selectivity of 91.96%,and cycling stability towards the NO_(2)^(−)RR,surpassing unitary In_(2)O_(3)and Pd/C ***,computed results indicate that NH_(3)production on Pd/In_(2)O_(3)follows the deoxidation to hydrogenation *** work highlights the significance of H^(*)and NO_(2)^(−)adsorption modulation and N=O activation in NO_(2)^(−)RR electrochemistry by creating synergy between a mediocre catalyst with an appropriate cooperator.

关键词： Dual-site adsorption Nitrite electroreduction Ammonia Pd Hydrogenation

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CCM-FL:Covert communication mechanisms for federated learning in crowd sensing IoT

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Digital Communications and Networks 2024年第3期10卷 597-608页

作者： Hongruo Zhang Yifei Zou Haofei Yin Dongxiao Yu Xiuzhen Cheng institute of Intelligent Computing School of Computer Science and TechnologyShandong UniversityQingdao266237China

The past decades have witnessed a wide application of federated learning in crowd sensing,to handle the numerous data collected by the sensors and provide the users with precise and customized ***,how to protect the private information of users in federated learning has become an important research *** with the differential privacy(DP)technique and secure multiparty computation(SMC)strategy,the covert communication mechanism in federated learning is more efficient and energy-saving in training the ma-chine learning *** this paper,we study the covert communication problem for federated learning in crowd sensing Internet-of-Things *** from the previous works about covert communication in federated learning,most of which are considered in a centralized framework and experimental-based,we firstly proposes a centralized covert communication mechanism for federated learning among n learning agents,the time complexity of which is O(log n),approximating to the optimal ***,for the federated learning without parameter server,which is a harder case,we show that solving such a problem is NP-hard and prove the existence of a distributed covert communication mechanism with O(log logΔlog n)times,approximating to the optimal solution.Δis the maximum distance between any pair of learning *** analysis and nu-merical simulations are presented to show the performance of our covert communication *** hope that our covert communication work can shed some light on how to protect the privacy of federated learning in crowd sensing from the view of communications.

关键词： Covert communications Federated learning Crowd sensing SINR model

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COVID-19 exacerbates psoriasis progression through inducing IFN-αexpression

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Asian Pacific Journal of Tropical Medicine 2024年第8期17卷 379-380,I0002页

作者： Mingjia Hu Lele Sun Qing Zhao Yanyan Li Zhenzhen Wang Hong Liu Furen Zhang Hospital for Skin Diseases Shandong First Medical UniversityJinanShandongChina shandong Provincial institute of Dermatology and Venereology Shandong Academy of Medical SciencesJinanShandongChina

As a global public health issue that can cause systemic diseases,COVID-19 inflicts various harms on patients and impacts those with *** is primarily driven by a subset of T helper cells and the cytokines[1],and microbial infection is a predisposing factor in up to 45%of patients[2].Infection with SARS-CoV-2 may trigger the aggravation of ***,we conducted a survey to explore the proportion of psoriasis patients who experienced exacerbation and relapse after SARS-CoV-2 infection and also performed a preliminary investigation into the mechanisms *** hundred and twenty-four psoriasis patients(79 males and 45 females)who contracted COVID-19 were followed up and provided detailed information.

关键词： psoriasis infection diseases

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Theoretical Design of Defects as a Driving Force for Ion Transport in Li_(3)OBr Solid Electrolyte

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Energy & Environmental Materials 2024年第3期7卷 143-153页

作者： Xingyun Luo Yanlu Li Xian Zhao State Key Lab of Crystal Materials and institute of Crystal Materials Shandong UniversityJinan 250100China Center for Optics Research and Engineering Shandong UniversityQingdao 266237China

Due to ever-increasing concerns about safety issues in using Li ionic batteries,solid electrolytes have extensively *** Li-rich antiperovskite Li_(3)OBr has been considered as a promising solid electrolyte candidate,but it still suffers challenges to achieve a high ionic conductivity owing to the high intrinsic symmetry of the crystal ***,we presented a design strategy that introduces various point defects and grain boundaries to break the high lattice symmetry of Li_(3)OBr crystal,and their effect and microscopic mechanism of promoting the migration of Li-ion were explored *** has been found that Li_(i)are the dominant defects responsible for the fast Li-ion diffusion in bulk Li_(3)OBr and its surface,but they are easily trapped by the grain boundaries,leading to the annihilating of the Frenkel defect pair V'_(Li)+Li_(i),and thus limits the V'_(Li)diffusion at the grain *** V_(Br)defect near the grain boundaries can effectively drive V'_(Li)across the grain boundary,thereby converting the carrier of Li^(+)migration from Li,in the bulk and surface to V'_(Li)at the grain boundary,and thus improving the ionic conductivity in the whole Li_(3)OBr *** work provides a comprehensive insight into the Li^(+)transport and conduction mechanism in the Li_(3)OBr *** opens a new way of improving the conductivity for all-solid-state Li electrolyte material through the defect design.

关键词： defects density functional theory ionic migration solid electrolyte

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