检索结果-南通市图书馆

REMOVE INCLUSIONS FROM ALUMINUM MELt INELECtROMAGNEtIC FIELD

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2000年第5期13卷 1068-1074页

作者： t.x.li Z.M.xu B.D.Sun D.Shu Y.H.Zhou School of Materials Science and Engineering Shanghai Jiao Tong UniversityShanghai 200030China

Electromagnetic separation of non-metallic inclusions from Al-Si melt is studied by theoretical analysis and experiments on self-designed electromagnetic separation apparatus. Metallographs and LECO Image Analysis System were used to analyze the content of alumina in aluminum alloy before and after electromagnetic separation. It is seen that removal effciency increases with the increase of electromagnetic force (EMF) and diameter of inclusion particles while decreases with the increase of melt velocity and height of separator. All alumina particles with diamete of 14μm have been removed successfully from the melt.

关键词： aluminum melt alumina particle electromagnetic separation removal efficiency

AN IN SItU SURFACE COMPOSItE AND GRADIENt MAtERIAL OF Al-Si ALLOY PRODUCED BY ELECtROMAGNEtIC FORCE

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2001年第5期14卷 335-340页

作者： Z.M. xu, t.x. li, Z.L. Zhu and Y.H. Zhou School of Materials Science and Engineering, Shanghai Jiao tong University, Shanghai 200030, China Sch. of Mat. Sci. and Eng. Shanghai Jiaotong Univ. Shanghai 200030 China

Because of the different conductivities between the primary phase (low electric conduc tivity) and the metal melt, electromagnetic force scarcely acts on the primary phase. thus, an electromagnetic repulsive force applied by the metal melt exerts on the pri mary phase when the movement of the melt in the direction of electromagnetic force is limited. As a result, the repulsive force exerts on the primary phase to push them to move in the direction opposite to that of the electromagnetic force when the metal melt with primary phase solidifies under an electromagnetic force field. Based on this, a new method for production of in situ surface composite and gradient material by electromagnetic force is proposed. An in situ primary Si reinforced surface composite of Al-15wt%Si alloy and gradient material of Al-l9wt%Si alloy were produced by this method. the microhardness of the primary Si is HV1320. the reinforced phase size is in the range from 40μm to 100μm. the wear resistance of Al-Si alloy gradient material can be more greatly increased than that of their matrix material.

关键词： Al-Si alloy electromagnetic force in situ surface composite gradient material

使用扩散峰度MRI的深度学习方法预测直肠癌对新辅助放化疗的反应

在线全文

学校读者我要写书评

暂无评论

国际医学放射学杂志 2020年第5期 608-609页

作者： x.Y.Zhang L.Wang H.t.Zhu Z.W.li M.Ye x.t.li 刘朝曦 Department of Radiology Peking University Cancer Hospital & Institute

摘要评估局部进展期直肠癌对术前新辅助放化疗的反应仍具有一定的挑战性。近年来,深度学习(DL)已广泛应用于肿瘤的诊断和治疗,并获得了较好的效果。目的开发并验

关键词：

Deciphering the role of mtH2O2 in hepatic ischemia-reperfusion injury mechanisms with low-background super-resolution fluorogenic probe

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China Chemistry 2025年第1期68卷 297-307页

作者： Bin Fang limin Wang Haoqin li Jiaxin Zhang Yang Ding Pan Pan li Bo Peng Hua Bai lin li Frontiers Science Center for Flexible Electronics Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials &Engineering Northwestern Polytechnical University Institute of Flexible Electronics (IFE Future Technologies) Xiamen University

Hepatic ischemia-reperfusion injury（HIRI） is characterized by mitochondrial dysfunction and oxidative stress. Monitoring mitochondrial hydrogen peroxide（mtH2O2） levels in real-time through super-resolution imaging is crucial for elucidating its distribution in live cells and its mechanism of action during HIRI. However, low-background fluorogenic probes have been overlooked in the context of super-resolution imaging. In this study, we developed a low-background fluorogenic probe（MitoWG） with the potential for super-resolution morphology-correlated mitochondrial identification to track the fluctuates of mtH2O2in HIRI. Activation of the desirable fluorescence properties of the probe by mtH2O2was confirmed using structural illumination microscopy（SIM）, enabling high-quality mitochondrial imaging with exceptional specificity and *** in mtH2O2levels were successfully observed in both cellular and rat models of HIRI. Furthermore, we associated the decline in mitochondrial redox homeostasis with accelerated mtH2O2production during HIRI, which triggered mitophagy deficiency and led to cell death. In conclusion, Mito-WG possesses excellent photophysical and low-background properties for SIM imaging, making it a promising tool for mtH2O2tracking in HIRI research and clinical diagnosis.

关键词： hepatic ischemia-reperfusion injury low-background mtH2O2-activatable super-resolution imaging fluorogenic probe

the Mechanism of Heating Rate on the Secondary Recrystallization Evolution in Grain Oriented Silicon Steel

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Wuhan University of technology(Materials Science) 2025年第1期40卷 275-282页

作者： GAO Qian li Jun WANG xianhui CAO Laifu GONG Jian li Bo Central Iron and Steel Research Institute Group Beijing 100081China Shougang Zhixin Electromagnetic Material R&D(Beijing)Co. Ltd.Beijing 101300China Beijing Shougang Co. Ltd.Qian’an 064404China

Grain-oriented silicon steels were prepared at different heating rates during high temperature annealing,in which the evolution of magnetic properties,grain orientations and precipitates were *** illustrate the Zener factor,the diameter and number density of precipitates of interrupted testing samples were statistically *** effect of precipitate ripening on the Goss texture and magnetic property was *** indicated that the trend of Zener factor was similar under different heating rates,first increasing and then decreasing,and that the precipitate maturing was greatly inhibited as the heating rate *** recrystallization was developed at the temperature of 1010℃when a heating rate of 5℃/h was used,resulting in Goss,Brass and{110}oriented grains growing abnormally and a magnetic induction intensity of ***,increasing the heating rate to 20℃/h would inhibit the development of undesirable oriented grains and obtain a sharp Goss ***,when the heating rate was extremely fast,such as 40℃/h,poor secondary recrystallization was developed with many island grains,corresponding to a decrease in magnetic induction intensity to 1.87 *** a suitable heating rate of 20℃/h,the sharpest Goss texture and the highest magnetic induction of 1.94 t with an onset secondary recrystallization temperature of 1020℃were found among the experimental variables in this *** heating rate affected the initial temperature of secondary recrystallization by controlling the maturation of precipitates,leading to the deviation and dispersion of Goss texture,thereby reducing the magnetic properties.

关键词： high temperature annealing heating rate secondary recrystallization grain oriented silicon steel

对比增强MRI预测局部进展期直肠癌新辅助放化疗后的t再分期

在线全文

学校读者我要写书评

暂无评论

国际医学放射学杂志 2023年第1期46卷 104-104页

作者： Q.Y.Lu Z.Guan x.Y.Zhang x.t.li R.J.Sun Q.Y.li 陈红

摘要直肠癌新辅助放化疗(NCRt)后准确再分期,对于局部切除病人的选择至关重要。常规MRI中结合t2WI和DWI方法在再分期方面存在一定的局限性。目的确定对比

关键词：

CO2-mediated bicarbonate conversion to concentrated formate in a CEM-based electrolyzer

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2025年第1期100卷 605-611页

作者： Haocheng xiong Donghuan Wu Haonan li Andrew li Qikun Hu Siyao Song Bingjun xu Qi Lu State Key Laboratory of Chemical Engineering Department of Chemical Engineering Tsinghua University College of Chemistry and Molecular Engineering Peking University Ordos Laboratory

Renewable energy-driven bicarbonate conversion to valuable chemicals presents an attractive strategy for mitigating CO2emissions,as bicarbonate can be efficiently generated from the capture of atmospheric CO2using alkaline solutions with reactive *** this work,we present a CO2-mediated bicarbonate conversion to pure formate using a cation exchange membrane-based electrolyzer with a 25 cm2electrode *** electrolysis achieved selectivities exceeding 75%for formate at a total current of 2.5 A,achieving formate concentrations up to 1.2 M and yields as high as 95%over extended *** techno-economic assessment confirmed the economic viability of the process,highlighting the potential for bicarbonate electrolysis as a sustainable method for producing valuable chemicals.

关键词： Electrocatalysis techno-economic assessments Electrochemistry Flow electrolyzer

Peripheral blood RNA biomarkers can predict lesion severity in degenerative cervical myelopathy

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第6期20卷 1764-1775页

作者： Zhenzhong Zheng Jialin Chen Jinghong xu Bin Jiang Lei li Yawei li Yuliang Dai Bing Wang Department of Spine Surgery The Second Xiangya Hospital of Central South UniversityChangshaHunan ProvinceChina

Degenerative cervical myelopathy is a common cause of spinal cord injury,with longer symptom duration and higher myelopathy severity indicating a worse *** numerous studies have investigated serological biomarkers for acute spinal cord injury,few studies have explored such biomarkers for diagnosing degenerative cervical *** study involved 30 patients with degenerative cervical myelopathy(51.3±7.3 years old,12 women and 18 men),seven healthy controls(25.7±1.7 years old,one woman and six men),and nine patients with cervical spondylotic radiculopathy(51.9±8.6 years old,three women and six men).Analysis of blood samples from the three groups showed clear differences in transcriptomic *** analysis identified 128 differentially expressed genes that were enriched in patients with neurological *** least absolute shrinkage and selection operator analysis,we constructed a five-gene model(tBCD,tPM2,PNKD,EIF4G2,and AP5Z1)to diagnose degenerative cervical myelopathy with an accuracy of 93.5%.One-gene models(tCAP and SDHA)identified mild and severe degenerative cervical myelopathy with accuracies of 83.3%and 76.7%,*** of two immune cell types(memory B cells and memory-activated CD4^(+)t cells)predicted levels of lesions in degenerative cervical myelopathy with 80%*** results suggest that peripheral blood RNA biomarkers could be used to predict lesion severity in degenerative cervical myelopathy.

关键词： biomarkers candidate genes degenerative cervical myelopathy gene expression analysis immune cell types neurological disabilities peripheral blood RNA profiles spinal cord injury

Double-confined nanoheterostructure Sb/Sb_(2)S_(3)@ti_(3)C_(2)t_(x)@C toward ultra-stable li-/Na-ion batteries

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2024年第5期43卷 2067-2079页

作者： Dan Wang Qun Ma Huan He Zhi-Yuan Wang Run-Guo Zheng Hong-Yu Sun Yan-Guo liu Chun-li liu School of Materials Science and Engineering Northeastern UniversityShenyang110819China School of Resources and Materials Northeastern University at QinhuangdaoQinhuangdao 066004China Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province Qinhuangdao 066004China Department of Physics and Oxide Research Center Hankuk University of Foreign StudiesYongin 17035Korea

Antimony-based materials with high capacities and moderate potentials are promising anodes for lithium-/-sodium-ion ***,their tremendous volume expansion and inferior conductivity lead to poor structural stability and sluggish reaction ***,a doubleconfined nanoheterostructure Sb/Sb_(2)S_(3)@ti_(3)C_(2)t_(x)@C has been fabricated through a solvothermal method followed by low-temperature heat *** dual protection of“Mxene”and“carbon”can better accommodate the volume expansion of Sb/Sb_(2)S_(3).the strong covalent bond(ti-S,ti-O-Sb,C-O-Sb)can firmly integrate Sb-based material with ti_(3)C_(2)t_(x)and carbon,which significantly improves the structure *** addition,the carbon layer can restrain the oxidation of Mxenes,and the nano-Sb/Sb_(2)S_(3)can facilitate electron/ion transport and suppress the restacking of *** heterogeneous interface between Sb and Sb_(2)S_(3)can further promote interfacial charge *** Mxene-Sb/Sb_(2)S_(3)@C-1 with the optimal Sb content shows high specific capacities,comparable rate properties and ultra-stable cycling performances(250 m Ah·g^(-1)after 2500 cycles at 1 A·g^(-1)for sodium-ion batteries).Ex situ x-ray diffractometer(xRD)test reveals the storage mechanism including the conversion and alloying process of Mxene-Sb/Sb_(2)S_(3)@*** voltammetry(CV)test results demonstrate that the pseudocapacitance behavior is dominant in Mxene-Sb/Sb_(2)S_(3)@C-1,especially at large *** design paves the way for exploring high-performance alloy-based/conversion-type anode for energy storage devices.

关键词： Sb/Sb_(2)S_(3) Mxene Carbon Anode lithium-ion batteries Sodium-ion batteries