检索结果-南通市图书馆

Batch synthesis of rare-earth nickelates electronic phase transition perovskites via rare-earth processing intermediates

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Rare Metals 2022年第10期41卷 3495-3503页

作者： Xiao-Yu Li Zi-Ang Li Feng-Bo Yan Hao Zhang jia-Ou Wang Xin-You Ke Yong jiang Nuo-Fu chen ji-kun chen School of New Energy North China Electric Power UniversityBeijing102206China School of Materials Science and Engineering University of Science and Technology BeijingBeijing100083China Beijing Synchrotron Radiation Facility Institute of High Energy PhysicsChinese Academy of SciencesBeijing100049China Department of Mechanical and Aerospace Engineering Case Western Reserve UniversityClevelandOH44106USA

The rare-earth nickelates(RENiO_(3)) exhibit an exceptional complex electronic phase diagram and multiple electronic phase transitions that enrich promising applications in correlated electronic devices beyond conventional ***,the practical applications of RENiO_(3) are challenged by their intrinsic thermodynamic metastability in material synthesis and high material ***,developing an economical strategy to achieve the batch synthesis of RENiO_(3) is of vital *** this work,we enlarged the synthesis amount of RENiO_(3) up to 20 g per batch using chloride(KCI) assisted molten salt *** optimizing the reaction conditions,the powder of RENiO_(3) with the cubic shape and average size of ~2μm was effectively synthesized,while their phase purity exceeded 95%.In addition,the cost to synthesize RENiO_(3) was further reduced by using rare-earth extraction intermediate products as the raw materials,instead of using the pure rare-earth *** also achieved wide adjustments in the metal-to-insulator-transition temperature from160 to 420 K without significantly reducing the transition *** enlarging the synthesis amount and the reducing the cost,it paves the way to the device application of RENiO_(3).

关键词： Quantum materials Rare-earth nickelates Metastable materials Perovskite oxides

A novel domain decomposition-based model for efficient dynamic predictions of large composite machine tools

在线全文

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2024年第6期67卷 1765-1782页

作者： YU YangBo ji Yu Lei chen YanRen XU kun BI QingZhen State Key Laboratory of Mechanical System and Vibration School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai200240China

We propose a large combined moving component composed of carbon fiber reinforced polymer(CFRP)laminates for making lightweight machine tools with high dynamic *** accurate dynamic prediction of composite machine tools is essential for the new generation machine *** paper aims to address two challenges in numerical dynamic modeling and the design of composite machine tools to enhance development efficiency.(1)Anisotropic composite laminates,which form the composite machine tool,exhibit coupling in various *** propose the generalized continuity condition of the boundary to tackle this dynamic modeling challenge.(2)Composite machine tools feature numerous composite-metal coupled *** mechanical model correction of isotropic metals is performed to address their *** take the example of a five-axis gantry machine tool with composite moving parts,establish a dynamic model for efficient prediction,and verify it through simulation and *** proposed method yields remarkable results,with an average relative error of only 3.85%in modal frequency prediction and a staggering 99.7%reduction in solution time compared to finite element *** further discuss the dynamic performance of the machine tool under varied stacking angles and layer numbers of the composite machine *** propose general design criteria for composite machine tools to consider the modal frequency and manufacturing cost of machine tools.

关键词： machine tool dynamics carbon fiber reinforced polymer composite laminates

Robust interface-induced unusual anomalous Hall effect in Mn_(3)Sn/Pt bilayers

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2022年第9期41卷 3012-3018页

作者： Jun-jie Liu Kang-Kang Meng ji-kun chen Yong Wu Jun Miao Xiao-Guang Xu Yong jiang School of Materials Science and Engineering University of Science and Technology BeijingBeijing100083China

Interface-driven magnetic phenomena related to spin-orbit coupling and intrinsic symmetry breaking are of great significance to the development of spintronics materials and ***_(3)Sn is a natural antiferromagnetic material with a non-collinear magnetic structure,and its anomalous Hall effect(AHE)has been reported to have high crystal anisotropy and temperature dependent ***,a large unusual anomalous Hall effect(UAHE)in the(0001)c-axis orientation Mn_(3)Sn/Pt bilayers in the whole temperature range from 5 to 300 K is reported,which is absent in single MnSn film.

关键词： film. unusual effect

Thermal stability of permafrost under U-shaped crushed rock embankment of the Qinghai-Tibet Railway

在线全文

学校读者我要写书评

暂无评论

Advances in Climate Change Research 2024年第1期15卷 158-169页

作者： kun-Ming XU Guan-Li jiANG ji chen Qing-Bai WU State Key Laboratory of Frozen Soil Engineering Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China University of Chinese Academy of Sciences Beijing 100049China Beiluhe Observation Station of Frozen Soil Environment and Engineering Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou730000China

The U-shaped crushed rock embankment(UCRE),of which widely utilized in the permafrost regions along the Qinghai-Tibet Railway,has the capability to rapidly reduce the ground temperature of the underlying ***,there remains uncertainty regarding the adaptation of UCRE to climate change and its long-term cooling *** study focuses on nine UCRE monitoring sites along the Qinghai-Tibet Railway to analyze the dynamic variations of the ground temperature underlying permafrost from 2006 to *** efficiency of UCRE in stabilizing permafrost temperature in different permafrost zones is evaluated by considering the permafrost table,ground temperature,and MAGT,as well as the temperature difference between the top and bottom of the crushed rock layer and the ground temperature variation index(GTVI).The results show that UCRE is suitable for application in extremely unstable warm permafrost regions where the MAGT is higher than-0.5℃.Moreover,UCRE effectively diminishes the disparity in permafrost thermal stability between the sunny and shaded shoulders of the *** short-term and long-term effect of cooling permafrost is experiencing a change related with permafrost ***,in stable cold permafrost regions with MAGT lower than-1.5℃,the long-term cooling effect of UCRE on permafrost seems to gradually di-minishes,but UCRE continues to fulfill the role of stabilizing the underlying permafrost thermal state over the *** results show that UCRE can quickly restore and stabilize the thermal state of permafrost in the early stages of construction,and adapt to the influence of future climate *** findings provide important guidance for understanding the variations of permafrost thermal stability beneath the embankment in permafrost regions,as well as for improving the embankment stability and operational safety of the Qinghai-Tibet Railway.

关键词： Qinghai-Tibet Railway U-shaped crushed rock embankment Climate change Permafrost zone Ground temperature variation index Long-term coolingrole

Sub-nanosized vanadate hybrid clusters maintain glucose homeostasis and restore treatment response in inflammatory disease in obese mice

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2024年第3期17卷 1818-1826页

作者： kun chen Shengqiu Liu Yujun Wei South China Advanced Institute for Soft Matter Science and Technology School of Emergent Soft MatterSouth China University of TechnologyGuangzhou 510641China Guangdong Provincial Key Laboratory of Technique and Equipment for Macromolecular Advanced Manufacturing South China University of TechnologyGuangzhou 510641China Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices South China University of TechnologyGuangzhou 510641China

Obesity is closely related with insulin resistance and chronic ***,we report that unsaturated lipid-modified polyoxovanadates(ULPOVs)can restrict weight gain of diet-induced obese mice and improve their glycemic control and obesity-associated *** administration of the sub-nanosized ULPOVs at a low dosage for 7 weeks reduces the body weight and almost normalizes the blood glucose levels of obese mice fed on a high-fat *** treatment increases the activity of the nuclear receptor peroxisome proliferator-activated receptorγ(PPARγ)and reduces intestinal caloric intake,which may be the main reason for blood sugar and body weight *** addition to insulin-sensitizing,PPARγactivation induced by ULPOV treatment in obese mice with atopic dermatitis(AD)promotes the type 2 T helper(TH_(2))cell selective responses and therapeutic effects on immune dysregulation caused by *** data suggest sub-nanosized polyoxovanadate clusters as a class of potential candidates to relieve symptoms accompanied by diet-induced obesity.

关键词： polyoxovanadates lipid modification glucose homeostasis obesity inflammatory disease peroxisome proliferator-activated receptorγ(PPARγ)

Advances in the study of gastric organoids as disease models

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastrointestinal Oncology 2024年第5期16卷 1725-1736页

作者： Yi-Yang Liu De-kun Wu ji-Bing chen You-Ming Tang Feng jiang Graduate School Guangxi University of Chinese MedicineNanning 530011Guangxi Zhuang Autonomous RegionChina Teaching Experiment and Training Center Guangxi University of Chinese MedicineNanning 530011Guangxi Zhuang Autonomous RegionChina Central Laboratory Ruikang Hospital Affiliated to Guangxi University of Traditional Chinese MedicineNanning 530011Guangxi Zhuang Autonomous RegionChina Department of Digestive Disease Ruikang Hospital Affiliated to Guangxi University of Traditional Chinese MedicineNanning 530011Guangxi Zhuang Autonomous RegionChina AIDS Research Center Ruikang Hospital Affiliated to Guangxi University of Traditional Chinese MedicineNanning 530011Guangxi Zhuang Autonomous RegionChina

Gastric organoids are models created in the laboratory using stem cells and sophisticated three-dimensional cell culture *** models have shown great promise in providing valuable insights into gastric physiology and advanced disease *** review comprehensively summarizes and analyzes the research advances in culture methods and techniques for adult stem cells and induced pluripotent stem cell-derived organoids,and patient-derived *** potential value of gastric organoids in studying the pathogenesis of stomach-related diseases and facilitating drug screening is initially *** construction of gastric organoids involves several key steps,including cell extraction and culture,three-dimensional structure formation,and functional *** the structure and function of the human stomach by disease modeling with gastric organoids provides a platform to study the mechanism of gastric cancer induction by Helicobacter *** addition,in drug screening and development,gastric organoids can be used as a key tool to evaluate drug efficacy and toxicity in preclinical *** can also be used for precision medicine according to the specific conditions of patients with gastric cancer,to assess drug resistance,and to predict the possibility of adverse ***,despite the impressive progress in the field of gastric organoids,there are still many unknowns that need to be addressed,especially in the field of regenerative ***,the reproducibility and consistency of organoid cultures are major challenges that must be *** challenges have had a significant impact on the development of gastric ***,as technology continues to advance,we can foresee more comprehensive research in the construction of gastric *** research will provide better solutions for the treatment of stomach-related diseases and personalized medicine.

关键词： Organoids Stomach neoplasms Helicobacter pylori Drug evaluation Preclinical Precision

Generalized Inverses and Units in a Unitary Ring

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2024年第4期40卷 1000-1014页

作者： Yu kun ZHOU jian Long chen School of Mathematics Southeast UniversityNanjing 210096P.R.China

Let R be a unitary ring and a,b∈R with ab=*** find the 2/3 property of Drazin invertibility:if any two of a,b and a+b are Drazin invertible,then so is the third ***,we combine the 2/3 property of Drazin invertibility to characterize the existence of generalized inverses by means of *** applications,the need for two invertible morphisms used by You and chen to characterize the group invertibility of a sum of morphisms is reduced to that for one invertible morphism,and the existence and expression of the inverse along a product of two regular elements are obtained,which generalizes the main result of Mary and Patricio(2016)about the group inverse of a product.

关键词： Leftπ-regular element stronglyπ-regular element group inverse Drazin inverse inverse along an element

Effect of Reclamation on the Groundwater-Lake Water Interaction in chen Lake

在线全文

学校读者我要写书评

暂无评论

Journal of Earth Science 2024年第3期35卷 1083-1086页

作者： kun Lei Teng Ma Liuzhu chen Zhenxing Li Yu chen School of Environmental Studies State Key Laboratory of Biogeology and Environmental GeologyChina University of GeosciencesWuhan 430078China

0 INTRODUCTION To relieve the short supply of suitable land for residing,cultivating,and commerce,it is accepted to reclaim land from lakes,river estuaries,and coastal regions in many countries(Mancini et al.,2020).The large-scale reclamation activities have an irreversible effect on the mico-geomorphology and hydrodynamic system of seasonally flooded areas(Zhang et al.,2019;Yu et al.,2018).For example,coastal regions reclaimed extended the groundwater flow paths,as well as created groundwater level rise,resulting in water-logging in the reclaimed area(Hu et al.,2008).Similar changes in groundwater flow systems may alter groundwater-lake water interactions,and it can ultimately affect the water cycle in the lake ***,such detailed studies are presently *** addition,natural exchanges between the lake and groundwater systems can be strongly affected by physical hydrological processes(Javadzadeh et al.,2020),chemical properties(Kamtchueng et al.,2015),and bioto behavior(Hancock et al.,2005).

关键词： groundwater coastal logging

Bias distribution and regulation in photoelectrochemical overall water-splitting cells

在线全文

学校读者我要写书评

暂无评论

National Science Review 2024年第4期11卷 141-150页

作者： kun Dang Siqin Liu Lei Wu Daojian Tang jing Xue jiaming Wang Hongwei ji Chuncheng chen Yuchao Zhang jincai Zhao Key Laboratory of Photochemistry CAS ResearchEducation Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences University of Chinese Academy of Sciences

The water oxidation half-reaction at anodes is always considered the rate-limiting step of overall water splitting（OWS）,but the actual bias distribution between photoanodes and cathodes of photoelectro chemical（PEC） OWS cells has not been investigated *** this work,we find that,for PEC cells consisting of photoanodes（nickel-modified n-Si [Ni/n-Si] and α-Fe2O3） with low photovoltage(Vph 1V,the bias required for cathode activation can be significantly reduced,exhibiting a kinetics-controlled *** investigations show that the bias distribution can be regulated by tuning the electrolyte pH and using alternative half-reaction ***,a volcano plot is presented for the rational design of the overall reactions and unbiased PEC *** by this,an unbiased PEC cell consisting of a simple Ni/n-Si photoanode and Pt cathode is assembled,delivering a photo current density of 5.3±0.2 mA cm-2.

关键词： photoelectrochemistry overall reaction cell bias distribution photoanode water splitting