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Electrochemical performance of a nano SnO_2-modified LiNi_(1/3)Co_(1/3)Mn_(1/3)O_2 cathode material

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Chinese Chemical Letters 2015年第11期26卷 1403-1408页

作者： Zhi-Mei Luo Yan-Guang Sun hui-yong liu School of Chemical Engineering Fuzhou University

The nano SnO2-modified LiNi1/3Co1/3Mn1/3O2 was successfully prepared by a carrier transfer method. The pristine and modified samples were characterized with various techniques such as XRD, SEM, XPS and EDS. The results showed that the SnO2particles did not enter the crystal structure of LiNi1/3Co1/3Mn1/3O2, many nano SnO2 particles were uniformly covered on the surface of LiNi1/3Co1/3Mn1/3O2 and the modified thin layer could inhibit the dissolution of transition metal oxides. The electrochemical tests indicated that the existence of nano SnO2 could improve the discharge capacity and rate capability owing to the decreased interfacial polarization, The cycling stability was remarkably improved at room temperature and 55 ℃. The XRD patterns of the fresh NCM electrode and after 50 cycles proved that the structural change of NCM was not so effective on the capacity fade.

关键词： Carrier transfer methodNano SnO2LiNi1/3Co1/3Mn1/3O2Surface modification

Correlation between intracoronary thrombus components and coronary blood flow after percutaneous coronary intervention for acute myocardial infarction at different onset time

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World Journal of Clinical Cases 2019年第15期7卷 2013-2021页

作者： Ming-Ji Zhang Xin liu Li-Hong liu Ning Li Ning Zhang yong-Qing Wang Xue-Jun Sun Ping-He Huang Hong-Mei Yin yong-hui liu Hong Zheng Department of Cardiology AnSteel Group Hospital

BACKGROUND Acute myocardial infarction(AMI)is a leading cause of *** reperfusion to restore blood flow is crucial to successful *** the current reperfusion regimen,an increasing number of patients have benefited from direct percutaneous coronary intervention(PCI).In order to understand whether there is a correlation between the components of coronary thrombosis and the absence of reflow or slow blood flow after coronary stent implantation in direct PCI,we collected data on direct PCI cases in our hospital between January 2016 and November *** To investigate the correlation between intracoronary thrombus components and coronary blood flow after stent implantation in direct PCI in *** We enrolled 154 patients(85 male and 69 female,aged 36–81 years)with direct PCI who underwent thrombus catheter aspiration within<3,3–6 or 6–12 h of onset of AMI between January 2016 and November *** thrombus was removed for pathological examination under a *** patients of the three groups according to the onset time of AMI were further divided into those with a white or red *** thrombolysis in myocardial infarction(TIMI)blood flow after stent implantation was recorded based on digital subtraction angiography during *** number of patients with no-reflow and slow blood flow in each group was *** analysis was performed based on data such as onset time,TIMI blood *** There were significant differences in thrombus components between the patients with acute ST-segment elevation myocardial infarction and non-ST-segment elevation myocardial infarction(P<0.01).In the group with PCI<3 h after onset of AMI,there was no significant difference in the incidence of no-reflow and slow-flow between the white and red thrombus *** the groups with PCI 3-6 and 6-12 h after onset of AMI,there was a significant difference in the incidence of no-reflow and slow-flow between the white and red thrombus groups(P<0.01).Th

关键词： Acute myocardial infarction Pathological thrombotic component Direct percutaneous coronary intervention Blood flow

Microstructure and properties of ductile iron bars for plunger pump prepared by horizontal continuous casting process

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China Foundry 2019年第2期16卷 118-125页

作者： Chun-jie Xu Zhen Zhao Yu Lei yong-hui liu Zhong-ming Zhang Yan Li Dan Shechtman School of Materials Science and Engineering Xi'an University of Technology Xi'an Shechtman Nobel Prize New Materials Institute Shaanxi Huaan Continuous Casting Co. Ltd. Faculty of Materials Science and Engineering Technion-Israel Insititue of Technology

Ductile iron bars(DIBs) with a diameter of 145 mm, used for plunger pump production, were made by the horizontal continuous casting(HCC). The microstructure of the samples cut at three locations with different distances away from the surface(~20 mm from the surface, half of the radius and the center of the HCCDIBs)were investigated. The mechanical properties were measured by tensile and torsion tests. Results show that after the spheroidization of graphite, the iron matrix incorporates the nodules of Format I, Size 8 close to the surface, Format I, Size 7 at the half of the radius from the surface, and Format II, Size 6 in the centre of the bar,according to the ASTM A247 standard. The content of pearlite in the matrix changes from 55%(~20 mm from the surface) to 70%(half of the radius) and 80%(the center of the HCCDIBs). The strengths in tension are 552, 607 and 486 MPa with the elongations of 12.5%, 10.5% and 5.8% in samples cut at these three locations from the surface to the centre, respectively. The strength in torsion is equal to 558, 551 and 471 MPa at corresponding torsion angles of 418°, 384° and 144° respectively to the same distance from the bar surface. Fracture in tension is manifested via crack propagation through the interface between graphite nodules and matrix(Mode I), while in torsion the fracture is caused by the shear of graphite nodules(Mode II). It is shown that the transition between two fracture modes is also dependent on the size of graphite nodule. Typically, fracture Mode I was observed for nodules of smaller diameter(less than 22.7 μm) and fracture Mode II was seen for nodules of greater diameter(more than 24.8 μm).

关键词： horizontal continuous casting ductile iron bars plunger pump tension and torsion properties microstructure

Effect of austempering parameters on microstructure and mechanical properties of horizontal continuous casting ductile iron dense bars

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China Foundry 2015年第2期12卷 104-110页

作者： Chun-jie Xu Pan Dai Zheng-yang Zhang Zhong-ming Zhang Jin-cheng Wang yong-hui liu School of Materials Science and Engineering Xi'an University of Technology State Key Laboratory of Solidification Processing Northwestern Polytechnical University Shaanxi Hua An Continuous Casting Co. Ltd.

In the present research, the orthogonal experiment was carried out to investigate the influence of different austempering process parameters （i.e. austenitizing temperature and time, and austempering temperature and time） on microstructure and mechanical properties of LZQT500-7 ductile iron dense bars with 172 mm in diameter which were produced by horizontal continuous casting （HCC）. The results show that the major factors influencing the hardness of austempered ductile iron （ADI） are austenitizing temperature and austempering temperature. The fraction of retained austenite increases as the austenitizing and austempering temperatures increase. When austenitizing temperature is low, acicular ferrite and retained austenite can be efifciently obtained by appropriately extending the austenitizing time. The proper austmepering time could ensure enough stability of retained austenite and prevent high carbon austenite decomposition. The optimal mechanical properties of ADI can be achieved with the fol owing process parameters： austenitizing temperature and time are 866 ＆#176;C and 135 min, and austempering temperature and time are 279 ＆#176;C and 135 min, respectively. The microstructure of ADI under the optimal austempering process consists of ifne acicular ferrite and a smal amount of retained austenite, and the hardness, tensile strength, yield strength, elongation and impact toughness of the bars are HBW 476, 1670 MPa, 1428 MPa, 2.93%and 25.7 J, respectively.

关键词： horizontal continuous casting (HCC) ductile iron dense bars austempered ductile iron (ADI) microstructure and mechanical properties orthogonal test

Catheter-Assisted Interlaminar Approach for Cervical Epidural Steroid Injection in Patient with Cervical Stenosis Caused by Ossification of Posterior Longitudinal Ligament: A Case Report

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Case Reports in Clinical Medicine 2024年第8期13卷 304-308页

作者： yong-hui liu You-Wen Wu Department of Neurosurgery Shin Kong Wu Ho-Su Memorial Hospital Taipei City Department of Psychiatry Shin Kong Wu Ho-Su Memorial Hospital Taipei City

We present the case of a 64-year-old man with cervical ossification of the posterior longitudinal ligament (OPLL) experiencing chronic neck pain and radiculopathy for 6 months. A catheter-assisted interlaminar Cervical Epidural Steroid Injection (CESI) was performed under fluoroscopic guidance, targeting the affected C2-C6 levels. Significant improvement was observed after this procedure, with decreased pain scores (visual analogue scale (VAS) 8 to 2) and improved mobility. This technique not only enhances the effectiveness of CESI but also reduces the likelihood of complications such as stroke or epidural hematoma and thus provides an alternative treatment option for patients with multiple stenotic levels who are unsuitable for surgery or are unresponsive to conservative therapy such as medication or physical therapy.

关键词： Catheter-Assisted Interlaminar Cervical Epidural Steroid Injection Ossification of Posterior Longitudinal Ligament Cervical Stenosis

Microstructure and properties of LZQT600-3 HCCDIBs for plunger pump cylinder

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China Foundry 2024年第2期21卷 197-204页

作者： Chun-jie Xu Yuan-ying Jin Dong Ma Zhen Zhao Jia-wei Qi Shang Sui Xiang-quan Wu Can Guo Zhong-ming Zhang yong-hui liu Dan Shechtman School of Materials Science and Engineering Xi'an University of TechnologyXi'an 710048China Xi'an Shechtman Nobel Prize New Materials Institute Xi'an 710048China Tongchuan Huazhu Precision Technology Co. Ltd.Tongchuan 727100ShaanxiChina Faculty of Materials Science and Engineering Technion-Israel Insititue of TechnologyHaifa 3200003Israel

It is important to improve the comprehensive performance of the ductile iron bars(DIBs)for the cylinder block of the extra high pressure hydraulic plunger pump and accelerate the industrial *** this work,the LZQT600-3 DIBs with the diameter of 145 mm were prepared by the horizontal continuous casting(HCC)process,that is,LZQT600-3 *** microstructure and room temperature tensile properties of different sections[left-edge(surface layer),left-1/2R(left half of the radius),and the center of the HCCDIBs]were *** results show that the spheroidization of LZQT600-3 HCCDIBs matrix from the left-edge,left-1/2R to the center is at nodulizing grade II and *** the cooling rate gradually decreases from surface to the center of the HCCIBs,the number of spheroidized graphite is gradually reduced,the size is gradually increased,the shape factor is decreased,and the pearlite content and lamellate spacing are *** the horizontal direction of the section,the hardness of the material is distributed symmetrically around the center of the *** the vertical direction,the hardness distribution in the center of the HCCDIBs is asymmetrical due to the gravity during the solidification ***,the microstructure in the lower part of the section solidifies relatively *** left-edge has the best tensile mechanical properties,and the ultimate tensile strength,yield tensile strength and elongation are 597.3 MPa,418.5 MPa and 9.6%,*** tensile fracture belongs to the ductile-brittle hybrid *** comprehensive performances of LZQT600-3 HCCDIBs meet the actual application requirements of ultra-high pressure hydraulic plunger pump cylinder.

关键词： horizontal continuous casting(HCC) nodular cast iron ductile iron bars microstructure mechanical properties

Rational modulation of fluorophosphate cathode by anionic groups to reduce the polarization behavior for fast-charging sodium-ion batteries

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Journal of Energy Chemistry 2025年第1期100卷 509-521页

作者： Xinyuan Wang Fan Zhang Xingyu Zhou Qian Wang Changyu liu Yangyang liu hui Wang Xiaojie liu Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education College of Chemistry & Materials Science Northwest University

Na3V2（PO4）2O2F （VP） is recognized as a promising cathode material for sodium-ion batteries due to its stable structural framework and high specific *** functional theory （DFT） and finite element simulations show that incorporating SO42-into VP decreases its band gap,lowers the migration energy barrier,and ensures a uniform Na+concentration gradient and stress distribution during charge and discharge ***,the average Na+diffusion coefficient of Na3V2（PO4）1.95（SO4）0.05O2F（VPS-1） is roughly double that of VP,leading to enhanced rate capability (80 C,75.5 mAh g-1) and cycling stability (111.0 mAh g-1capacity after 1000 cycles at 10 C current density) for ***-1 exhibits outstanding fast-charging capabilities,achieving an 80%state of charge in just 8.1 *** assembled VPS-1//SbSn/NPC full cell demonstrated stable cycling over 200 cycles at a high 5 C current,maintaining an average coulombic efficiency of 95.35%.

关键词： Anionic group modulation Polarization behavior Fast-charging Sodium-ion battery Fluorophosphate Cathode

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矩阵广义逆的一个混合反序律

数学学报（中文版） 2009年第1期52卷 197-204页

作者：刘永辉田永革上海金融学院应用数学系上海201209 中央财经大学中国经济与管理研究院北京100081

使用矩阵三元组(A,B,C)的乘积型广义奇异值分解,证明了总是存在广义逆矩阵A^((1,2,3)),B^((1,2))和C^((1,2,4)),使得矩阵乘积ABC的Moore-Penrose逆可以表示成如下形式(ABC)^+=C^((1,2,4))B^((1,2))A^((1,2,3)).所获结果是Wibker,Howe和G... 详细信息

关键词： Moore-Penrose广义逆混合反序律三矩阵的乘积型广义奇异值分解

Epicardial isolation of pulmonary veins with ethanol in open chest dogs

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Chinese Medical Journal 2011年第11期124卷 1714-1719页

作者： YIN Xian-dong NING Man SANG Cai-hua MIAO Cheng-long LIANG Cui TANG Ri-bo LONG De-yong YU Rong-hui liu Xing-peng DONG Jian-zeng MA Chang-sheng Department of Cardiology Beijing Anzhen Hospital CapitalMedical University Beijing 100029 China

Background Radiofrequency （RF） ablation has become a widely accepted treatment for atrial fibrillation （AF）. This study aimed to identify the efficacy and safety of pulmonary vein （PV） ablation with ethanol and to explore an alternative energy source for catheter ablation of AF. Methods Twelve open-chest mongrel dogs were randomized into ethanol ablation group and control group. Both the injections and electrophysiological mapping procedures were performed epicardialy. In ethanol ablation group （n=-6）, injections were performed to circumferentially ablate the root of each PV （0.2 ml each site, 3 mm apart） with 95% ethanol using an 1 ml injector. In control group （n=6）, saline was injected other than ethanol.

关键词： ethanol pulmonary vein isolation epicardial atrial fibrillation