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Measurement of the neutron-induced total cross sections of ^(nat)Pb from 0.3 eV to 20 MeV on the Back-n at CSNS

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Nuclear Science and Techniques 2024年第2期35卷 85-93页

作者： jie-Ming Xue Song Feng Yong-Hao Chen han Yi Min Xiao Pin-Jing Cheng Xin-Xiang Li Rong Liu Yi-Wei Yang zi-jie han Da-Jun Zhao Hao-Qiang Wang Bao-Qian Li Ji-Rong Zhao Lei-Xun Tang Wen Luo Bo Zheng School of Nuclear Science and Technology University of South ChinaHengyang 421001China Institute of High Energy Physics Chinese Academy of Sciences(CAS)Beijing 100049China Spallation Neutron Source Science Center Dongguan 523803China Institute of Nuclear Physics and Chemistry China Academy of Engineering PhysicsMianyang 621900China

The neutron-induced total cross sections of natural lead have been measured in a wide energy range(0.3 eV-20 MeV)on the back-streaming white neutron beamline(Back-n)at the China Spallation Neutron *** energy was determined by the neutron total cross-section spectrometer using the time-of-flight technique.A fast multi-cell fission chamber was used as the neutron detector,and a 10-mm-thick high-purity natural lead sample was employed for the neutron transmission *** on-beam background was determined using Co,In,Ag,and Cd *** excitation function of ^(nat)Pb(n,tot)reaction below 20 MeV was calculated using the TALYS-1.96 nuclear-reaction modeling *** present results were compared with previous results,the evaluated data available in the five major evaluated nuclear data libraries(i.e.,ENDF/B-VIII.0,JEFF-3.3,JENDL-5,CENDL-3.2,and BROND-3.1),and the theoretical calculation *** agreement was found between the new results and those of previous experiments and with the theoretical curves in the corresponding *** measurement obtained the neutron total cross section of natural lead with good accuracy over a wide energy range and added experimental data in the resonance energy *** provides more reliable experimental data for nuclear engineering design and nuclear data evaluation of lead.

关键词： Neutron-induced total cross section Natural lead Time-of-flight TALYS-1.96 CSNS Back-n white neutron beamline

Riemann-Hilbert Problem and Multiple High-order Poles Solutions of the Focusing mKdV Equation with Nonzero Boundary Conditions

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Acta Mathematicae Applicatae Sinica 2025年第1期41卷 234-251页

作者： zi-yi WANG Shou-fu TIAN Jin-jie YANG School of Mathematics China University of Mining and TechnologyXuzhou 221116China

The focusing modified Korteweg-de Vries(mKdV)equation with multiple high-order poles under the nonzero boundary conditions is first investigated via developing a Riemann-Hilbert(RH)*** begin with the asymptotic property,symmetry and analyticity of the Jost solutions,and successfully construct the RH problem of the focusing mKdV *** solve the RH problem when 1/S_(11)(k)has a single highorder pole and multiple high-order ***,we derive the soliton solutions of the focusing mKdV equation which corresponding with a single high-order pole and multiple high-order poles,***,the dynamics of one-and two-soliton solutions are graphically discussed.

关键词： Riemann-Hilbert approach focusing mKdV equation nonzero boundary conditions multiple high-order poles soliton solutions

Insights into microscopic oil occurrence characteristics in shales from the Paleogene Funing Formation in Subei Basin, China

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Petroleum Science 2025年第1期22卷 55-75页

作者： Jun-jie Wang Peng-Fei Zhang Shuang-Fang Lu zi-Zhi Lin Wen-Biao Li Jun-Jian Zhang Wei-Zheng Gao Neng-Wu Zhou Guo-Hui Chen Ya-jie Yin han Wu Sanya Offshore Oil & Gas Research Institute of Northeast Petroleum University College of Earth Science and Engineering Shandong University of Science and Technology Key Laboratory of Continental Shale Hydrocarbon Accumulation and Efficient Development Ministry of Education Northeast Petroleum University School of Geoscience China University of Petroleum (East China)

The microscopic occurrence characteristics primarily constrain the enrichment and mobility of shale *** study collected the lacustrine shales from the Palaeogene Funing Formation in the Gaoyou Sag, Subei Basin. Conventional and multistage Rock-Eval, scanning electron microscopy, and nuclear magnetic resonance(NMR) T1-T2were performed to analyze the contents and occurrence characteristics of shale oil. Low-temperature nitrogen adsorption-desorption(LTNA/D) experiments were conducted on the shales before and after extraction. The relationships between shale oil occurrence with organic matter and pore structures were then discussed. Predominantly, the shale oil in the Funing Formation is found within fractures, with secondary occurrences in interparticle pores linked to brittle minerals and sizeable intraparticle pores associated with clay minerals. The selected shales can be categorized into two types based on the nitrogen isotherms. Type A shales are characterized by high contents of felsic and calcareous minerals but low clay minerals, with larger TOC and shale oil values. Conversely, Type B shales are marked by abundant clay minerals but diminished TOC and shale oil contents. The lower BET specific surface area(SSA), larger average pore diameter, and simpler pore surfaces and pore structures lead to the Type A shales being more conducive to shale oil enrichment and mobility. Shale oil content is predominantly governed by the abundance of organic matter, while an overabundance of organic matter typically equates to a reduced ratio of free oil and diminished fluidity. The BET SSA, volumes of pores less than 25 and 100 nm at extracted state all correlate negatively with total and adsorbed oil contents but display no correlation with free oil, while they have positive relationships with capillary-bound ***, pore water is mainly saturated in micropores(<25 nm) and minipores(25-100 nm), as well as adsorbed oil, while free oil, i.e., bound and movable

关键词： Occurrence characteristic Shale oil content Pore structure Low-temperature nitrogen adsorption-desorption Gaoyou Sag

Alpiniae oxyphyllae Fructus ameliorates renal lipid accumulation in diabetic kidney disease via activating PPARα

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Asian Pacific Journal of Tropical Biomedicine 2025年第1期15卷 11-23,I0008-I0012页

作者： zi-jie Yan Lin Zhang Xin-Yao han Yu Kang Shu-Man Liu Tian-Peng Ma Man Xiao Yi-Qiang Xie College of Traditional Chinese Medicine Hainan Medical UniversityHaikou 571199China First Clinical College of Medicine of Guizhou University of Traditional Chinese Medicine Guiyang 550002China Heilongjiang Academy of Traditional Chinese Medicine Harbin 150001China Key Laboratory of Tropical Translational Medicine of Ministry of Education School of Basic Medicine and Life SciencesHainan Medical UniversityHaikou 571199China

Objective:To investigate the effects of Alpiniae oxyphyllae Fructus(AOF)on renal lipid deposition in diabetic kidney disease(DKD)and elucidate its molecular ***:The mechanism of AOF in treating DKD was explored by network pharmacological enrichment analysis,molecular docking,and molecular dynamics *** effects of AOF on renal function and lipid deposition were assessed in a mouse model of DKD and high glucose-stressed HK-2 *** viability and lipid accumulation were detected by CCK8 and oil red O *** expressions of PPARαand fatty acid oxidation-related genes(ACOX1 and CPT1A)were detected by quantitative RT-PCR,Western blot,and ***,PPARαknockdown was performed to examine the molecular mechanism of AOF in treating ***:Network pharmacological enrichment analysis,molecular docking,and molecular dynamics simulation showed that the active compounds in AOF targeted PPARαand thus transcriptionally regulated ACOX1 and *** lowered blood glucose,improved dyslipidemia,and attenuated renal injury in DKD ***-containing serum accentuated high glucose-induced decrease in cell viability and ameliorated lipid ***,it significantly upregulated the expression of PPARα,ACOX1,and CPT1A in both in vivo and in vitro experiments,which was reversed by PPARα***:AOF may promote fatty acid oxidation via PPARαto ameliorate renal lipid deposition in DKD.

关键词： Diabetic kidney disease Alpiniae oxyphyllae Fructus Natural medicine Lipid accumulation PPARα Fatty acid oxidation

Impact of Spinal Manipulative Therapy on Brain Function and Pain Alleviation in Lumbar Disc Herniation:A Resting-State fMRI Study

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Chinese Journal of Integrative Medicine 2025年第2期31卷 108-117页

作者： ZHOU Xing-chen WU Shuang WANG Kai-zheng CHEN Long-hao WEI zi-cheng LI Tao HUA zi-han XIA Qiong LYU Zhi-zhen LYU Li-jiang Department of Spine The Third Affiliated Hospital of Zhejiang Chinese Medicine UniversityHangzhou(310053)China Department of Spine The Third School of Clinical MedicineZhejiang Chinese Medicine UniversityHangzhou(310053)China Research Institute of Tuina(Spinal Disease) Zhejiang Chinese Medicine UniversityHangzhou(310053)China

Objective:To elucidate how spinal manipulative therapy(SMT)exerts its analgesic effects through regulating brain function in lumbar disc herniation(LDH)patients by utilizing resting-state functional magnetic resonance imaging(rs-f MRI).Methods:From September 2021 to September 2023,we enrolled LDH patients(LDH group,n=31)and age-and sex-matched healthy controls(HCs,n=28).LDH group underwent rs-f MRI at 2 distinct time points(TPs):prior to the initiation of SMT(TP1)and subsequent to the completion of the SMT sessions(TP2).SMT was administered once every other day for 30 min per session,totally 14 treatment sessions over a span of 4 *** did not receive SMT treatment and underwent only one f MRI ***,participants in LDH group completed clinical questionnaires on pain using the Visual Analog Scale(VAS)and the Japanese Orthopedic Association(JOA)score,whereas HCs did not undergo clinical scale *** effects on the brain were jointly characterized using the amplitude of low-frequency fluctuations(ALFF)and regional homogeneity(Re Ho).Correlation analyses were conducted between specific brain regions and clinical ***:Following SMT treatment,pain symptoms in LDH patients were notably alleviated and accompanied by evident activation of effects in the *** comparison to TP1,TP2 exhibited the most significant increase in ALFF values for Temporal_Sup_R and the most notable decrease in ALFF values for Paracentral_Lobule_L(voxelwise P30;FDR correction).Additionally,the most substantial enhancement in Re Ho values was observed for the Cuneus_R,while the most prominent reduction was noted for the Olfactory_R(voxelwise P30;FDR correction).Moreover,a comparative analysis revealed that,in contrast to HCs,LDH patients at TP1 exhibited the most significant increase in ALFF values for Temporal_Pole_Sup_L and the most notable decrease in ALFF values for Frontal_Mid_L(voxelwise P30;FDR correction).Fur

关键词： functional magnetic resonance imaging lumbar disc herniation spinal manipulative therapy pain

Hierarchically Porous Polypyrrole Foams Contained Ordered Polypyrrole Nanowire Arrays for Multifunctional Electromagnetic Interference Shielding and Dynamic Infrared Stealth

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Nano-Micro Letters 2025年第4期17卷 399-418页

作者： Yu-long Liu Ting-yu Zhu Qin Wang zi-jie Huang De-xiang Sun Jing-hui Yang Xiao-dong Qi Yong Wang School of Chemistry Key Laboratory of Advanced Technologies of Materials(Ministry of Education)Southwest Jiaotong UniversityChengdu 610031People’s Republic of China

As modern communication and detection technologies advance at a swift pace,multifunctional electromagnetic interference(EMI)shielding materials with active/positive infrared stealth,hydrophobicity,and electric-thermal conversion ability have received extensive *** the aforesaid requirements simultaneously remains a huge *** this research,the melamine foam(MF)/polypyrrole(PPy)nanowire arrays(MF@PPy)were fabricated via one-step electrochemical *** hierarchical MF@PPy foam was composed of three-dimensional PPy micro-skeleton and ordered PPy nanowire *** to the upwardly grown PPy nanowire arrays,the MF@PPy foam possessed good hydrophobicity ability with a water contact angle of 142.00°and outstanding stability under various harsh ***,the MF@PPy foam showed excellent thermal insulation property on account of the low thermal conductivity and elongated ligament characteristic of PPy nanowire ***,taking advantage of the high conductivity(128.2 S m^(-1)),the MF@PPy foam exhibited rapid Joule heating under 3 V,resulting in dynamic infrared stealth and thermal camouflage *** importantly,the MF@PPy foam exhibited remarkable EMI shielding effectiveness values of 55.77 dB and 19,928.57 dB cm^(2)g^(-1).Strong EMI shielding was put down to the hierarchically porous PPy structure,which offered outstanding impedance matching,conduction loss,and multiple *** innovative approach provides significant insights to the development of advanced multifunctional EMI shielding foams by constructing PPy nanowire arrays,showing great applications in both military and civilian fields.

关键词： Polypyrrole nanowire arrays Hierarchical foam Hydrophobicity Infrared stealth Electromagnetic interference shielding

2024 Annual Report of China Mineral Resources (copper, gold, coal, etc.)

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China Geology 2025年第1期8卷 235-236页

作者： Li-qiong Jia Xi-jie Chen zi-guo Hao Development and Research Center China Geological SurveyMinistry of Natural ResourcesBeijing 100037China

In October 2024,the Ministry of Natural Resources of PRC released the 2024 China Mineral Resources Report,which focuses on new progress since 2023 in the geological and mineral survey and evaluation,mineral resource exploration and development,mine ecological restoration,green mine construction,new changes in mineral resource policies and regulations,new measures in mineral resource management,new situations in scientific and technological innovation,as well as the new achievements of the international geological and mineral cooperation.

关键词： gold copper resource

Microstructural evolution during tempering process and mechanical properties of Cr-Ni-Mo-V/Nb high strength steel

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Journal of Iron and Steel Research International 2025年第1期32卷 270-281页

作者： zi-wei Lv Jing Fan Rui Wang Zhi-qiang Yu Yan Kang Yong Hu Lei-feng Tuo Jürgen Eckert Zhi-jie Yan School of Materials Science and Engineering North University of ChinaTaiyuan 030051ShanxiChina Shanxi Key Laboratory of Advanced Metal Materials for Special Environments North University of ChinaTaiyuan 030051ShanxiChina School of Materials Science and Engineering Taiyuan University of Science and TechnologyTaiyuan 030024ShanxiChina Erich Schmid Institute of Materials Science Austrian Academy of SciencesLeoben 8700Austria Department of Materials Science Chair of Materials PhysicsMontanuniversitat LeobenLeoben 8700Austria

High strength steels exhibit superior mechanical properties due to the unique microstructure,which successfully solves the drawback of the inevitable strength-toughness trade-off that occurs in traditional *** we investigated the effect of matrix and precipitates on mechanical properties of Cr-Ni-Mo-V/Nb steel after water quenching and tempering(150-500℃).The results showed that the microstructure of the present steel is noticeably tuned by changing the tempering *** excellent combination of strength(a yield strength of 1308 MPa with a total elongation of 8.2%)and toughness(Charpy V-notch impact toughness of 40.5 J/cm^(2))is obtained upon tempering at 200℃.This is attributed to the lath martensite containing high dislocation density,the martensite-twin substructure,and the strengthening effects of the precipitated needle-likeε-carbides and spherical VC *** acicularε-carbides are replaced by the rod-shaped Fe_(3)C at the tempering temperature of 350℃,resulting in the remarkable deterioration in strength,hardness,and *** carbides formed at a tempering temperature of 500℃ are beneficial to the enhancement of the elongation and toughness,but the strength decreases due to the matrix softening caused by the recovery of dislocation.

关键词： High strength steel Tempering Microstructure Carbide Mechanical property

New poly-types of LPSO structures in a non-equilibrium Mg_(97)Zn_(1)Y_(1.6)Ca_(0.4)alloy

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China Foundry 2025年第1期22卷 83-89页

作者： Qian-qian Jin zi-hui Tang Wen-long Xiao Xiu-yu Qu Xu-hao han Lin Mei Xiao-hong Shao Xiu-liang Ma School of Biological and Chemical Engineering Guangxi University of Science and TechnologyLiuzhou 545006GuangxiChina Center for the Structure of Advanced Matter School of Electronic EngineeringGuangxi University of Science and TechnologyLiuzhou 545006GuangxiChina Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Bay Area Center for Electron Microscopy Songshan Lake Materials LaboratoryDongguan 523808GuangdongChina

In this study,a comprehensive analysis of microstructural features,morphology,crystal structures,and interface structures of long-period stacking ordered(LPSO)structures in a non-equilibrium Mg_(97)Zn_(1)Y_(16)Ca_(0.4)alloy cast in a steel mold was carried *** addition of Ca element plays an important role in the refinement of LPSO *** result reveals new poly-types including 20H F2F2F4,60R(F2F3F3)_(3),and 66H F2F3F3F2(F6)_(4)featuring a 6-Mg structure,alongside the prevalent 18R and 14H LPSO *** incoherent interface between 20H and the Mg matrix is split into two dislocation arrays,leading to the formation of a segment of 60R_(1).Moreover,the superstructure 116L,designated as(F2)_(18)F4,is formed through the ordered distribution of F4 stacking faults in 18R.

关键词： LPSO structures crystal structure Mg alloys heterogeneous interface