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Effects of Pulse Current on Solidification Structure of Austenitic Stainless Steel

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Journal of Iron and Steel Research International 2004年第6期11卷 37-39页

作者： fan Jin-hui CHEN Yu li Ren-xing ZHAI Qi-jie Shanghai University Hebei University of Science and Technology

The 1Cr18Ni9Ti specimens were treated respectively with pulse current under 520 V and 2 600 V during solidification and the solidification structure was *** results showed that pulse current can refine solidification grains,cut primary dentrities remarkably and reduce second dentritic arm *** mechanism and effect are changed with operation parameters.

关键词： pulse current austenitic stainless steel solidification structure

Qishen Taohong Granule as Adjuvant Therapy for Improving Cardiac Function and Quality of life in Patients with Chronic Heart Failure:A Randomized Controlled Trial

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Chinese Journal of Integrative Medicine 2022年第1期28卷 12-19页

作者： li xing-xing WU Yang fan Zong-jing CUI Jie li Dong liN Quan ZHUANG Rui YAN Rong-kun liN Qian li Yan Department of Graduate School Beijing University of Chinese MedicineBeijing(100029)China Department of Cardiology Dongfang HospitalBeijing University of Chinese MedicineBeijing(100078)China Department of Cardiology Xiyuan HospitalChina Academy of Chinese Medical SciencesBeijing(100091)China Department of Cardiology Dongzhimen HospitalBeijing University of Chinese MedicineBeijing(100700)China

Objective:To confirm the improvement of cardiac function and quality of life(QoL)in patients with chronic heart failure(CHF)via Chinese medicine(CM)Qishen Taohong Granule(QTG).Methods:This study was a single-center,prospective,randomized,controlled clinical ***-six patients from 27 to 84 years old diagnosed with CHF New York Heart Association(NYHA)classⅡorⅢin stage C were enrolled and randomly assigned at a 1:1 ratio to receive QTG or trimetazidine(TMZ),in addition to their standard medications for the treatment of *** study period was 4 *** primary outcomes included cardiac function evaluated by NYHA classification and left ventricular ejection fraction(LVEF),as well as QoL evaluated by CHF Integrated Chinese and Western Medicine Survival Scale(CHFQLS).The secondary outcomes included 6-min walking test(6 MWT),CM syndrome score,symptom and sign scores and N-terminal pro-B-type natriuretic peptide level(NT-proBNP).All indices were measured at baseline and the end of the ***:At the 4-week follow-up period,the effective rate according to NYHA classification in the QTG group was better than that in the TMZ group(74.29%vs.54.29%,P0.05).The CHFQLS scores improved by 13.82±6.04 vs.7.49±2.28 in the QTG and TMZ groups,respectively(Plimitation and vitality were significantly higher in the QTG group than in the TMZ group(15.76±7.85 vs.7.40±3.36,P<0.05;16.00±8.35 vs.10.53±4.64,P<0.05;15.31±8.09 vs.7.89±4.60,P<0.05).Compared with TMZ group,treatment with QTG also demonstrated superior performance with respect to 6 MWT,CM syndrome,shortness of breath,fatigue,gasping,general edema and NT-proBNP *** significant adverse reactions or adverse cardiac events occurred during treatment in either ***:In addition to conventional treatments,the use of QTG a

关键词： chronic heart failure Chinese medicine Qishen Taohong Granule cardiac function quality of life

Research on Clustering Equivalent Modeling of Large-Scale Photovoltaic Power Plants

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Chinese Journal of Electrical Engineering 2018年第4期4卷 80-85页

作者： Fei li Yao Huang fan Wu Yang liu xing Zhang School of Electric Engineering and Automation Hefei University of TechnologyHefei 230041China

There are dozens or hundreds of grid-connected inverters for large-scale photovoltaic power *** order to facilitate the study of the impact that large-scale photovoltaic power plants have on the power system while avoiding the need to establish a detailed model for each inverter,it is necessary to establish the equivalent model of large-scale photovoltaic power *** generation units of the same type are combined by K-means clustering algorithm to reduce the simulation scale in *** to the actual data of Shenmu large-scale grid-connected photovoltaic power station,employing RT-LAB software is used to conduct simulation verification and error *** simulation results verify the proposed clustering equivalent modeling method is effective and can accurately track photovoltaic power station’s dynamic characteristics.

关键词： Photovoltaic power plant inverter clustering equivalent dynamic RT-LAB

Polyhedral Oligomeric Silsesquioxanes(POSS)-based Hybrid Materials:Molecular Design,Solution *** and Biomedical Applications

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Chinese Journal of Chemistry 2021年第3期39卷 757-774页

作者： linfeng fan xing Wang Decheng Wu Beijing National Laboratory for Molecular Sciences State Key Laboratory of Polymer Physics&ChemistryInstitute of ChemistryChinese Academy of SciencesBejing 100190China University of Chinese Academy of Sciences Bejjing 100049China Department of Biomedical Engineering Southern University of Science and TechnologyShenzhenGuangdong 518055China

Owing to the tremendous advantages and unique well-defined nanoscale structure,polyhedral oligomeric silsesquioxanes(POSS)have received considerable interest in the design of novel organic-inorganic hybrid nanomaterials with all manner of prominent capabilities,which is rec-ognized as a new generation of promising materials for advanced applications of material sci-ence,engineering science and biomedical *** from the recent progress in combi-nation of controlled/living polymerization and emerging click chemistry,POSS-based hybrid ma-terials with ingenious design,versatile topological structure and sophisticated multifunctionality have been successfully fabricated and developed into abundant well-defined hybrid nanostruc-tures with desired physicochemical ***-made amphiphilic molecular design and nanosized hybrid architecture provide opportunities for the self-assembly of POSS-based hybrid materials with unique hierarchical morphologies in selective *** the in-depth understanding of structure-properties relationship,POSS-based hybrid materials can achieve the modulation of precise control of self-assembling process and multi-purpose applications with improved material *** this review,we summarize the recent advances of POSS-based hybrid materials in molecular design,self-assembly behavior in solutions and poten-tial biomedical applications with main concerns on drug delivery,gene therapy,bioimaging and tissue engineering ***,future directions and remaining challenges for further advance-ment of POSS-based hybrid materials are proposed and discussed.

关键词： POSS Hybrids Topology Self-assembly Drug delivery Bone regeneration

Rare-earth based materials:an effective toolbox for brain imaging,therapy,monitoring and neuromodulation

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light(Science & Applications) 2022年第8期11卷 1667-1685页

作者： Zheng Wei Yawei liu Bo li Jingjing li Shuang Lu Xiwen xing Kai liu fan Wang Hongjie Zhang State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022China School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei230026China Department of Biotechnology College of Life Science and TechnologyJinan UniversityGuangzhou510632China Department of Chemistry Tsinghua UniversityBeijing100084China

Brain diseases, including tumors and neurodegenerative disorders, are among the most serious health problems. Non-invasively high-resolution imaging methods are required to gain anatomical structures and information of the brain. In addition, efficient diagnosis technology is also needed to treat brain disease. Rare-earth based materials possess unique optical properties, superior magnetism, and high X-ray absorption abilities, enabling high-resolution imaging of the brain through magnetic resonance imaging, computed tomography imaging, and fluorescence imaging technologies. In addition, rare-earth based materials can be used to detect, treat, and regulate of brain diseases through fine modulation of their structures and functions. Importantly, rare-earth based materials coupled with biomolecules such as antibodies, peptides, and drugs can overcome the blood-brain barrier and be used for targeted treatment. Herein, this review highlights the rational design and application of rare-earth based materials in brain imaging, therapy, monitoring, and neuromodulation. Furthermore, the development prospect of rare-earth based materials is briefly introduced.

关键词： functions. earth Rare

NiB_(2)O_(4)(B=Mn or Co)catalysts for NH_(3)-SCR of NO_(x) at low-temperature in microwave field

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Frontiers of Environmental Science & Engineering 2023年第8期17卷 57-67页

作者： liyun Song Shilin Deng Chunyi Bian Cui liu Zongcheng Zhan Shuangye li Jian li xing fan Hong He Key Laboratory of Beijing on Regional Air Pollution Control Beijing Key Laboratory for Green Catalysis and SeparationBeijing University of TechnologyBeijing 100124China Qingdao Huashijie Environment Technology Co. Ltd.Qingdao 266510China

Microwave-assisted selective catalytic reduction of nitrogen oxides(NOx)was investigated over Nibased metal *** NiMn2O4 and NiCo_(2)O_(4) catalysts were synthesized by the co-precipitation method and their activities were evaluated as potential candidate catalysts for low-temperature NH_(3)-SCR in a microwave *** physicochemical properties and structures of the catalysts were characterized by X-ray diffraction(XRD),Scanning electron microscope(SEM),N_(2)-physisorption,NO adsorption-desorption in the microwave field,H2-temperature programmed reduction(H2-TPR)and NH3-temperature programmed desorption(NH_(3)-TPD).The results verified that microwave radiation reduced the reaction temperature required for NH_(3)-SCR compared to conventional heating,which needed less *** the NiMn_(2)O_(4) catalyst,the catalytic efficiency exceeded 90%at 70°C and reached 96.8%at 110°C in the microwave ***,the NiMn_(2)O_(4) also exhibited excellent low-temperature NH3-SCR reaction performance under conventional heating conditions,which is due to the high BET specific surface area,more suitable redox property,good NO adsorption-desorption in the microwave field and rich acidic sites.

关键词： Microwave field Spinel oxides NO_(x) Selective catalytic reduction

First principles study on lattice vibration and electrical properties of layered perovskite Sr_2M_2O_7(M=Nb, Ta)

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Chinese Physics B 2018年第8期27卷 406-414页

作者： xing liu Hui-Qing fan State Key Laboratory of Solidification Processing School of Materials Science and Engineering Northwestern Polytechnical University.Xi＇an 710072 China

In this paper, we performed calculations to investigate the dielectric, piezoelectric properties, Born effective charge （BEC）, and spontaneous polarization of Sr2M207, the method used in our study was a well-known density functional theory based on first-principles. The optimized results were in good agreement with previous experiments and calculations. which indicates that our calculated method is reasonable. The research we have done suggested that greater piezoelectric components of Sr2Nb207 were e31 and e33, and the contributions were derived from the A I. By studying the Born effective charge, it could be seen that the valence of ions changed, and the O of Sr2Nb207 were most obviously that caused by the covalent character of ions and the hybridization of O-2p and Nb-4d. The spontaneous polarization of Sr2Nb2O7 in the [001 ] direction is 25 p_C/cm2, while for Sr2Ta2O7, there was no spontaneous polarization in the paraelectric state. Finally, the effect of pressure on the piezoelectric properties were also investigated, the polarization of Sr2Nb2O7 decreased linearly with the increase alter pressure. All our preliminary results throw light on the nature of dielectric, piezoelectric properties, Born effective charge, and spontaneous polarization of Sr2M2OT, it was helpful for experimental research, the development of new materials, and future applications.

关键词： Sr2M2O7, first-principles dielectric and piezoelectric properties Born effective charge sponta-neous polarization

Cubic nanocrystal constructed 3D porous liMn_(2)O_(4): Low-temperature pyrolysis formation and high-performance as a cathode material for aqueous hybrid capacitor

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Journal of Materiomics 2021年第3期7卷 488-497页

作者： Jun fan li-li Yu Gai-Di fan Wei-ling Xu Juan-Juan xing Jing-Tai Zhao School of Material Science and Engineering Shanghai UniversityShanghai200444China School of Material Science and Engineering Guilin University of Electronic TechnologyGuilin541004China

3D porous nano-liMn2O4(nano-LMO)is successfully prepared at 250℃ by a low temperature pyrolysis,using porous MnO2 and lithium acetate as *** as-formed porous samples are demonstrated to be constructed by well-defined and uniform cubic nanocrystals with particle sizes regulated from tens to hundreds of nanometers by adjusting the annealing *** to its proper particle size with perfect crystallization(-50 nm)and rich pores,sample LMO-265,prepared at 265℃,exhibits high performance as an aqueous lithium ion *** can present a high specific capacity of 102 mAh g1 at a current density of 5℃ with a greatly improved rate capability(57.3%,68C)and capacity retention(70.7%,after 5000 cycles at 13.5C)in 1 M li_(2)SO_(4).When assembled with commercial used active carbon(AC)to form an aqueous hybrid capacitor,it can deliver a high energy density of 15.8 Wh kg1 at a large power density of 9 kW kg1 with a good cycling life of 71.6%after 5000 at 2 Ag^(-1).Considering of its simple and economical preparation,as-prepared porous LMO can be regarded as a promising high-performance cathode material in aqueous electrolyte.

关键词： lithium manganese oxides aqueous lithium-ion cathode Porous material Solid pyrolysis

Alcohol consumption and metabolic syndrome among Shanghai adults: A randomized multistage stratified cluster sampling investigation

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World Journal of Gastroenterology 2008年第15期14卷 2418-2424页

作者： Jian-Gao fan Xiao-Bu Cai Lui li xing-Jian li Fei Dai Jun Zhu Center for Fatty liver Disease Shanghai First People's Hospital Jiaotong University Shanghai 200080 China Department of Chronic Disease Center for Disease Control and Prevention Shanghai 200036 China Fei D8i Department of Public Health Jiaotong University School of Medicine Shanghai 200025 China Department of Public Health Jiaotong University Schoolof Medicine Shanghai 200025 China

AIM: To examine the relations of alcohol consumption to the prevalence of metabolic syndrome in Shanghai adults. METHODS: We performed a cross-sectional analysis of data from the randomized multistage stratified cluster sampling of Shanghai adults, who were evaluated for alcohol consumption and each component of metabolic syndrome, using the adapted U.S. National Cholesterol Education Program criteria. Current alcohol consumption was defined as more than once of alcohol drinking per month. RESULTS: The study population consisted of 3953 participants (1524 men) with a mean age of 54.3 ± 12.1 years. Among them, 448 subjects (11.3%) were current alcohol drinkers, including 405 males and 43 females. After adjustment for age and sex, the prevalence of current alcohol drinking and metabolic syndrome in the general population of Shanghai was 13.0% and 15.3%, respectively. Compared with nondrinkers, the prevalence of hypertriglyceridemia and hypertension was higher while the prevalence of abdominal obesity, low serum high-density-lipoprotein cholesterol (HDL-C) and diabetes mellitus was lower in subjects who consumed alcohol twice or more per month, with a trend toward reducing the prevalence of metabolic syndrome. Among the current alcohol drinkers, systolic blood pressure, HDL-C, fastingplasma glucose, and prevalence of hypertriglyceridemia tended to increase with increased alcohol consumption. However, low-density-lipoprotein cholesterol concentration, prevalence of abdominal obesity, low serum HDL-C and metabolic syndrome showed the tendency to decrease. Moreover, these statistically significant differences were independent of gender and ***: Current alcohol consumption is associated with a lower prevalence of metabolic syndrome irrespe- ctive of alcohol intake (g/d), and has a favorable influence on HDL-C, waist circumference, and possible diabetes mellitus. However, alcohol intake increases the likelihood of hypertension, hypertriglyceridemia and hyperglyce

关键词： Alcohol Metabolic syndrome Obesity Type2 diabetes Epidemiology Chinese