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O_(2) adsorption on Fe_(3)O_(4) (110) surface and effect of gangue element Al doping: combined study of binding experiment and ab initio molecular dynamics

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Journal of Iron and Steel Research(International) 2024年第4期31卷 810-827页

作者： Zheng-jian Liu hui-qing Jiang Yao-zu wang Jian-liang Zhang Hong-mei Qiao An-yang Zheng Fang-yu Guo School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China School of Intelligence Science and Technology University of Science and Technology BeijingBeijing 100083China Beijing Shougang Co. Ltd.Qian'an 064404HebeiChina Department of Physics National University of Defense TechnologyChangsha 410128HunanChina

At high temperature,the chemical reaction mechanism at the interface of magnetite and the influence mechanism of gangue element Al on the oxidation performance of magnetite are not *** addition,due to the limitation of existing experimental equipment,it is difficult to clarify the interface reaction mechanism in the oxidation process and the influence mechanism of Al on the surface oxidation reaction of Fe_(3)O_(4) at an atomic scale at high *** surface oxidation reaction mechanism of magnetite and the influence mechanism of Al on the oxidation of magnetite were studied by experiments and AIMD(ab initio molecular dynamics).The experimental results show that the existence of Al_(2)O_(3) will reduce the initial oxidation temperature and comprehensive oxidation performance of *** AIMD results show that aluminum can accelerate the interface reaction rate of Fe_(3)O_(4) in the high-temperature oxidation atmosphere,but the strong Al-O binding ability is not conducive to the transfer of O atoms in the oxidation process.

关键词： Ironmaking Magnetite oxidation Interface reaction Adsorption-Gangue aluminum AIMD

Prescribed-time stabilization and inverse optimal control of stochastic high-order nonlinear systems

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Science China(Information Sciences) 2024年第2期67卷 144-156页

作者： Ran LIU hui wang Wuquan LI School of Mathematics and Statistics Science Ludong University

This paper investigates the prescribed-time state-feedback stabilization and prescribed-time inverse optimality problems for stochastic high-order nonlinear systems. First, a time-varying controller is designed by developing scaled quartic Lyapunov functions, which can guarantee that the system has a unique strong solution almost surely on the prescribed interval for any system initial conditions and that the states and the control converge to the origin in a mean-square form within the prescribed time. Then, the controller is redesigned to address the problem of prescribed-time inverse optimal mean-square stabilization. Finally,a concrete example is provided to confirm the efficiency of the proposed design schemes.

关键词： stochastic high-order nonlinear systems prescribed-time stabilization the scaled design inverse optimality

Metadherin promotes stem cell phenotypes and correlated with immune infiltration in hepatocellular carcinoma

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World Journal of Gastroenterology 2024年第8期30卷 901-918页

作者： Yi-Ying wang mei-mei Shen Jian Gao Department of Gastroenterology The Second Affiliated Hospital of Chongqing Medical UniversityChongqing 400010China Department of Gastroenterology and Hepatology The Second Affiliated Hospital of Chongqing Medical UniversityChongqing 400010China

BACKGROUND Metadherin(MTDH)is a key oncogene in most cancer types,including hepato-cellular carcinoma(HCC).Notably,MTDH does not affect the stemness pheno-type or immune infiltration of *** To explore the role of MTDH on stemness and immune infiltration in *** MTDH expression in HCC tissues was detected using TCGA and GEO *** was used to analyze the tissue *** was stably knocked down or overexpressed by lentiviral transfection in the two HCC cell *** invasion and migration abilities of HCC cells were evaluated using Matrigel invasion and wound healing ***,we obtained liver cancer stem cells from the spheroids by culturing them in a serum-free *** expression was determined by western blotting and quantitative reverse transcri-ption *** cytometry,immunofluorescence,and tumor sphere formation assays were used to characterize stem-like *** effects of MTDH inhibition on tumor growth were evaluated in *** correlation of MTDH with immune cells,immunomodulators,and chemokines was analyzed using ssGSEA and TISIDB *** HCC tissues expressed higher levels of MTDH than normal liver *** MTDH expression was associated with a poor *** cells overex-pressing MTDH exhibited stronger invasion and migration abilities,exhibited a stem cell-like phenotype,and formed spheres;however,MTDH inhibition attenuated these *** inhibition suppressed HCC progression and CD133 expression in *** was positively correlated with immature dendritic,T helper 2 cells,central memory CD8^(+)T,memory B,activated dendritic,natural killer(NK)T,NK,activated CD4^(+)T,and central memory CD4^(+)T *** was negatively correlated with activated CD8^(+)T cells,eosinophils,activated B cells,monocytes,macrophages,and mast cells.A positive correlation was observed between the MTDH level and CXCL2 expression,whereas a negative correlation was observed between the MTDH level and CX3CL1 a

关键词： Metadherin Hepatocellular carcinoma Cancer stem cells Immune infiltration

亚热带典型农业流域碳平衡估算研究——以金井河流域为例

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农业现代化研究 2024年第2期45卷 306-315页

作者：姜文倩李思琪王美慧李勇沈健林刘新亮盛良学宫殿林朱奇宏吴金水中国科学院亚热带农业生态研究所中国科学院长沙农业环境观测研究站湖南长沙410125 中国科学院大气物理研究所北京100029 中国科学院大学北京100049 国家环境保护城市大气复合污染成因与防治重点实验室上海市环境科学研究院上海200233 南宁师范大学北部湾环境演变与资源利用教育部重点实验室地理与海洋研究院广西南宁530001

度量流域碳中和程度的年度温室气体净排放量,是二氧化碳(CO_(2))、甲烷、氧化亚氮等温室气体净排放量的CO_(2)当量总和,其中的CO_(2)净排放量大小由流域碳平衡计量。因此,为实现在2030年之前碳排放量达到峰值和2060年前“碳中和”的宏... 详细信息

度量流域碳中和程度的年度温室气体净排放量,是二氧化碳(CO_(2))、甲烷、氧化亚氮等温室气体净排放量的CO_(2)当量总和,其中的CO_(2)净排放量大小由流域碳平衡计量。因此,为实现在2030年之前碳排放量达到峰值和2060年前“碳中和”的宏伟目标(即“双碳”目标),以流域为尺度单元全面了解其碳平衡情况至关重要。本研究基于走访调查数据、MODIS数据集以及前人研究结果,利用政府间气候变化专门委员会(IPCC)温室气体清单指南提供的参考方法,对湖南省长沙县农业小流域——金井河流域的碳平衡进行估算研究。结果显示,2011—2020年该流域的碳吸收量(以纯碳计)范围为1.289万~1.982万t/a,其中森林、茶园和农田生态系统碳吸收量分别占总吸收量的83.4%、2.6%和14.0%。流域的碳排放量范围为0.373万~1.342万t/a,主要排放贡献源是交通运输和工业生产,分别占总碳排放量的57.1%和28.8%。金井河流域碳平衡指数小于1,表明该流域为碳汇。本研究为以流域尺度的碳源汇清查提供了典型案例,并为研究区域制定“双碳”目标的实施路径提供了有益参考。

关键词：碳平衡碳源碳汇碳排放碳吸收金井河流域

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Compensation temperatures and hysteresis behaviors of a graphene-like trilayer

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Communications in Theoretical Physics 2024年第5期76卷 166-179页

作者： Ying An Ji Liang Wei wang mei-mei Du Feng-ge Zhang School of Science Shenyang University of TechnologyShenyang 110870China School of Electrical Engineering Shenyang University of TechnologyShenyang 110870China

This work focuses on the ground-state phase diagram,the compensation temperatures and the critical behaviors of a ferrimagnetic graphene-like trilayer induced by crystal fields and exchange *** simulation results show that a negative decrease in crystal field or an increase in exchange coupling can increase the critical *** importantly,an M curve with double compensation temperatures can be observed,which is not predicted by the Neel *** remarkable compensation phenomenon has potential application value in the field of magnetic recording.

关键词： graphene-like trilayer mixed-spin Ising model magnetization double compensation temperatures triple-loop hysteresis monte Carlo

High quality repair of osteochondral defects in rats using the extracellular matrix of antler stem cells

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World Journal of Stem Cells 2024年第2期16卷 176-190页

作者： Yu-Su wang Wen-hui Chu Jing-Jie Zhai Wen-Ying wang Zhong-mei He Quan-Min Zhao Chun-Yi Li Institute of Antler Science and Product Technology Changchun Sci-Tech UniversityChangchun 130000Jilin ProvinceChina College of Chinese Medicinal Materials Jilin Agricultural UniversityChangchun 130118Jilin ProvinceChina School of Life Science Taizhou UniversityTaizhou 318000Zhejiang ProvinceChina Department of Oral Implantology Hospital of StomatologyJilin UniversityChangchun 130000Jilin ProvinceChina

BACKGROUND Cartilage defects are some of the most common causes of *** lesions caused by inflammation,trauma or degenerative disease normally result in osteochondral *** studies have shown that decellularized extracellular matrix(ECM)derived from autologous,allogenic,or xenogeneic mesenchymal stromal cells(MSCs)can effectively restore osteochondral *** To determine whether the decellularized ECM of antler reserve mesenchymal cells(RMCs),a xenogeneic material from antler stem cells,is superior to the currently available treatments for osteochondral *** We isolated the RMCs from a 60-d-old sika deer antler and cultured them in vitro to 70%confluence;50 mg/mL L-ascorbic acid was then added to the medium to stimulate ECM *** sheets of adipocyte-derived MSCs(aMSCs)and antlerogenic periosteal cells(another type of antler stem cells)were used as the *** weeks after ascorbic acid stimulation,the ECM sheets were harvested and applied to the osteochondral defects in rat knee *** The defects were successfully repaired by applying the *** highest quality of repair was achieved in the RMC-ECM group both in vitro(including cell attachment and proliferation),and in vivo(including the simultaneous regeneration of well-vascularized subchondral bone and avascular articular hyaline cartilage integrated with surrounding native tissues).Notably,the antler-stem-cell-derived ECM(xenogeneic)performed better than the aMSC-ECM(allogenic),while the ECM of the active antler stem cells was superior to that of the quiescent antler stem *** Decellularized xenogeneic ECM derived from the antler stem cell,particularly the active form(RMC-ECM),can achieve high quality repair/reconstruction of osteochondral defects,suggesting that selection of decellularized ECM for such repair should be focused more on bioactivity rather than kinship.

关键词： Osteochondral defect repair Mesenchymal stem cells Extracellular matrix Decellularization Antler stem cells Reserve mesenchymal cells Xenogeneic

Qualitative exploration of home life experiences and care needs among elderly patients with temporary intestinal stomas

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World Journal of Gastroenterology 2024年第22期30卷 2893-2901页

作者： Si-Meng wang Jian-Ling Jiang Rui Li Juan-Juan wang Chun-Hong Gu Jia Zeng Xiao-hui Wei mei Chen Wuxi Medical College of Jiangnan University Jiangnan UniversityWuxi 214122Jiangsu ProvinceChina Department of Gastrointestinal Surgery Tongren Hospital Shanghai Jiao Tong University School of MedicineShanghai 200335China Department of Nursing Tong Ren Hospital Shanghai Jiao Tong University School of MedicineShanghai 200335China

BACKGROUND This study employed a phenomenological research approach within qualitative research to explore the challenges encountered by elderly individuals with temporary colostomies in managing their daily lives and care *** the anus surgery combined with temporary colostomy has emerged as a prevalent treatment modality for low rectal ***,the ileostomy is susceptible to peri-stoma skin complications,as well as fluid,electrolyte,and nutritional imbalances,posing challenges to effective *** successful selfmanagement of patients is intricately linked to their adjustment to temporary colostomy;nonetheless,there remains a dearth of research examining the factors influencing self-care among temporary colostomy patients and the obstacles they *** To investigate the lived experiences,perceptions,and care requirements of temporary colostomy patients within their home environment,with the ultimate goal of formulating a standardized management *** Over the period of June to August 2023,a purposive sampling technique was utilized to select 12 patients with temporary intestinal stomas from a tertiary hospital in Shanghai,*** a phenomenological research approach,a semi-structured interview guide was developed,and qualitative interviews were conducted using in-depth interview *** acquired data underwent coding,analysis,organization,and summarization following Colaizzi’s seven-step *** The findings of this study revealed that the experiences and needs of patients with temporary intestinal stomas can be delineated into four principal themes:Firstly,Temporary colostomy patients bear various burdens and concerns about the uncertainty of disease progression;secondly,patients exhibit limited self-care capabilities and face information deficits,resulting in heightened reliance on healthcare professionals;thirdly,patients demonstrate the potential for internal motivation through proactive self-adj

关键词： Elderly Temporary intestinal stomas Life experiences Intestinal ostomy complications Qualitative study

Contribution of intraseasonal oscillation to long-duration summer precipitation events over southern China

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Atmospheric and Oceanic Science Letters 2017年第1期10卷 82-88页

作者： LIU Ge WU Ren-Guang wang hui-mei State Key Laboratory of Severe Weather Chinese Academy of Meteorological Sciences Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Nanjing University of Information Science & Technology Center for Monsoon System Research Institute of Atmospheric PhysicsChinese Academy of Sciences

本文重点分析了中国南方地区长持续性(14天以上)夏季降水事件的环流异常背景和相应的前期信号。结果显示,长持续性降水事件主要由中国南方及其相邻的南海地区低层(850-h Pa)气旋性环流异常导致。该气旋性环流异常可以追溯到30天以前新... 详细信息

本文重点分析了中国南方地区长持续性(14天以上)夏季降水事件的环流异常背景和相应的前期信号。结果显示,长持续性降水事件主要由中国南方及其相邻的南海地区低层(850-h Pa)气旋性环流异常导致。该气旋性环流异常可以追溯到30天以前新几内亚以北的热带地区,随后它自热带地区逐渐向北略偏西方向移动,最终影响了中国南方地区长持续性降水事件。其北移特征在30–60天滤波后的风场中也有清楚的体现,暗示了30–60天季节内振荡自热带西太平洋地区向北的传播可能对中国南方地区长持续性夏季降水事件具有重要贡献。

关键词：降水事件长持续性中国南方地区季节内振荡

Effects of operating conditions on iron(hydr)oxides evolution and ciprofloxacin degradation in potassium ferrate-ozone stepwise oxidation system

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Journal of Environmental Sciences 2024年第1期135卷 367-378页

作者： Xiaochen Li Yifan wang Ning wang mei Li Maomao Bai Jingtao Xu Hongbo wang School of Municipal and Environmental Engineering Shandong Jianzhu UniversityJinan 250101China Resources and Environment Innovation Institute Shandong Jianzhu UniversityJinan 250101China

In this study,a stepwise oxidation system of potassium ferrate(K_(2)FeO_(4))combined with ozone(O+3)was used to degrade ciprofloxacin(CIP).The effects of pH and pre-oxidation time of K_(2)FeO_(4) on the evolution of K_(2)FeO_(4) reduction products(iron(hydr)oxides)and CIP degradation were *** was found that in addition to its own oxidation capacity,K_(2)FeO_(4) can also influence the treatment effect of CIP by changing the catalyst *** presence of iron(hydr)oxides effectively enhanced the mineralization rate of CIP by catalyzing *** pH value can influence the content and types of the components with catalytic ozonation effect in iron(hydr)*** K_(2)FeO_(4) pre-oxidation stage can produce more iron(hydr)oxides with catalytic components for subsequent ozonation,but the evolution of iron(hydr)oxides components was influenced by O_(3) *** can also avoid the waste of oxidation capacity owing to the oxidation of iron(hydr)oxides by O_(3) and free *** intermediate degradation products were identified by Fourier transform ion cyclotron resonance mass spectrometry(FT-ICR-MS).Besides,the degradation pathways were *** the degradation products of CIP,the product with broken quinolone ring structure only appeared in the stepwise oxidation system.

关键词： Potassium ferrate reduction products Catalytic ozonation Ciprofloxacin Potassium ferrate pre-oxidation time