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SmartMat 2023年第4期4卷 145-177页

作者： Jiawei Liu Carmen Lee Yue Hu Zhishan Liang Rong Ji xiang yun Debbie Soo Qiang Zhu Qingyu Yan School of Materials Science and Engineering Nanyang Technological UniversitySingaporeSingapore Institute of Materials Research and Engineering(IMRE) Agency for ScienceTechnology and Research(A*STAR)SingaporeSingapore

Developing sustainable and clean energy-conversion techniques is one of the strategies to simultaneously meet the global energy demand,save fossil fuels and protect the environment,in which nanocatalysts with high activity,selectivity and durability are of great *** nanocrystals,featuring their ordered atomic arrangements and predictable electronic structures,have been recognized as a type of active and durable catalysts in energy-related *** this minireview,the very recent progress in the syntheses and electrocatalytic applications of noble metal-based intermetallic nanocrystals is *** synthetic strategies,including the conventional thermal annealing approach and its diverse modifications,as well as the wet-chemical synthesis,for the construction of binary,ternary and high-entropy intermetallic nanocrystals have been discussed with representative examples,highlighting their strengths and ***,their electrocatalytic applications toward oxygen reduction reaction,small molecule oxidation reactions,hydrogen evolution reaction,CO_(2)/CO reduction reactions,and nitrogen reduction reaction are discussed,with the emphasis on how the ordered intermetallic structures contribute to the enhanced *** conclude the minireview by addressing the current challenges and opportunities of intermetallic nanocrystals in terms of syntheses and electrocatalytic applications.

关键词： binary intermetallic electrocatalysis high-entropy intermetallic intermetallic nanocrystals ternary intermetallic

Steel Design by Advanced Analysis: Material Modeling and Strain Limits

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Engineering 2019年第2期5卷 243-249页

作者： Leroy Gardner xiang yun Andreas Fieber Lorenzo Macorini Department of Civil and Environmental Engineering Imperial College London London SW7 2AZ UK

Structural analysis of steel frames is typically performed using beam elements. Since these elements are unable to explicitly capture the local buckling behavior of steel cross-sections, traditional steel design specifications use the concept of cross-section classification to determine the extent to which the strength and deformation capacity of a cross-section are affected by local buckling. The use of plastic design methods are restricted to Class 1 cross-sections, which possess sufficient rotation capacity for plastic hinges to develop and a collapse mechanism to form. Local buckling prevents the development of plastic hinges with such rotation capacity for cross-sections of higher classes and, unless computationally demanding shell elements are used, elastic analysis is required. However, this article demonstrates that local buckling can be mimicked effectively in beam elements by incorporating the continuous strength method (CSM) strain limits into the analysis. Furthermore, by performing an advanced analysis that accounts for both geometric and material nonlinearities, no additional design checks are required. The positive influence of the strain hardening observed in stocky cross-sections can also be harnessed, provided a suitably accurate stress–strain relationship is adopted;a quad-linear material model for hot-rolled steels is described for this purpose. The CSM strain limits allow cross-sections of all slenderness to be analyzed in a consistent advanced analysis framework and to benefit from the appropriate level of load redistribution. The proposed approach is applied herein to individual members, continuous beams, and frames, and is shown to bring significant benefits in terms of accuracy and consistency over current steel design specifications.

关键词： Advanced analysis Continuous strength method Local buckling Material modeling Strain limits

Effects of hydroxyl group on H_2 dissociation on graphene:A density functional theory study

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Journal of Energy Chemistry 2013年第3期22卷 493-497页

作者： Ning Wang Likun Wang Qinggang Tan yun-xiang Pan College of Materials Science and Engineering Key Laboratory for Advanced Civil Engineering Materials(Ministry of Education)Tongji University

Graphene-based materials are promising for hydrogen production and storage. In this work, using density functional theory calculations, we explored how a hydroxyl group influences H2 dissociation on graphene. Presence of the hydroxyl group makes the binding of H atom with graphene stronger, as the binding energy of H atom with the hydroxyl-modified graphene is higher than that with the pristine graphene. The para-site is the most favorable site for H2 dissociation on both the pristine and hydroxyl-modified graphene. The energy barrier of H2 dissociation at para-site on the pristine graphene is 3.10 eV whereas that on the hydroxyl-modified graphene is 2.46 eV, indicating a more facile H2 dissociation on the hydroxyl-modified graphene.

关键词： graphene hydroxyl H2 dissociation hydrogen transfer density functional theory

Analysis of the application and practice of PDCA cycle in management of the naked medicine dispensing——the quality and safety of the drug

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Frontiers of Nursing 2019年第3期6卷 227-231页

作者： yun-xiang Qiu Chun-Yan Zhao Jia-Mei Zhu Lin-Jun Li Department of Oncology The East Hospital Affiliated to Tong Ji UniversityShanghai 2001123China Department of Nursing The East Hospital Affiliated to Tong Ji UniversityShanghai 2001123China Department of Cardiology The East Hospital Affiliated to Tong Ji UniversityShanghai 2001123China

Objective:To explore the application of plan–do–check–action(PDCA)cycle in the management of the naked medicine dispensing about the automatic package and to analyze the practice improved in the quality of naked medicine dispensing medicine ***:The PDCA theory was used to analyze the data,to find out the causes of the problem,and to formulate the corresponding countermeasures to *** data of the naked medicine/adverse drug events satisfaction degree of the inpatients in 18 inpatient departments given for the adoption of PDCA cycle in January 2017 were set as the observation *** number of the naked medicine/adverse drug events satisfaction degree of patients in 18 inpatient departments before adoption of PDCA cycle in December 2016 was set as the control *** number of the naked medicine/adverse drug events satisfaction degree of patients in 18 inpatient departments before and after adoption of PDCA cycle was observed and ***:The number of the naked medicine/adverse drug events after implementing the method of PDCA cycle management rate was significantly lower than before the implementation method of PDCA cycle management,and the difference had statistical significance(P<0.05).The satisfaction degree of the inpatients after implementing the method of PDCA cycle management rate was significantly higher than that before the implementation method of PDCA cycle management,and the difference had statistical significance(P<0.05).Conclusion:Application of PDCA cycle in the management of the naked medicine dispensing about the automatic package can help to reduce the adverse drug events,to improve the safety of drug treatment,and to increase the patients’satisfaction degree.

关键词： PDCA cycle the naked medicine dispensing automatic medicine packing machine quality and safety drug administration

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天然抗氧化剂碧萝芷研究进展

中国药学杂志 2005年第6期40卷 403-405页

作者：罗湘云成都理工大学材料与生物工程学院四川成都610059

目的总结碧萝芷所含的化学成分、各类药理活性的研究概况和国内的研究进展。方法查阅国内外近几年来的20多篇相关的文献资料加以分析评述。结果发现碧萝芷具有保护循环系统、调节免疫、抗衰老等多种活性,并可从抗氧化、调节NO和炎症治疗... 详细信息

目的总结碧萝芷所含的化学成分、各类药理活性的研究概况和国内的研究进展。方法查阅国内外近几年来的20多篇相关的文献资料加以分析评述。结果发现碧萝芷具有保护循环系统、调节免疫、抗衰老等多种活性,并可从抗氧化、调节NO和炎症治疗3个机制来解释。结论碧萝芷有广阔的应用和发展前景,应从国内实际情况出发进一步研究我国的抗氧化产品。

关键词：碧萝芷松树皮提取物抗氧化自由基 NO

Suprapubic cystostomy versus nonsuprapubic cystostomy during monopolar transurethral resection of prostate： a propensity score-matched analysis

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Asian Journal of Andrology 2018年第1期20卷 62-68页

作者： Run-Qi Guo Yi-Sen Meng Wei Yu Kai Zhang Ben Xu yun-xiang Xiao Shi-Liang Wu Bai-Nian Pan Department of Urology Peking University First Hospital and Institute of Urology National Research Center for Genitourinary Oncology Beijing 100034 China

We aim to reassess the safety of the monopolar transurethral resection of the prostate （M-TURP） without suprapubic cystostomy at our institution over the past decade. This retrospective study was conducted in patients who underwent M-TURP at Peking University First Hospital between 2003 and 2013. A total of 1680 patients who had undergone M-TURP were identified, including 539 patients in the noncystostomy group and 1141 patients in the cystostomy group. After propensity score matching, the number of patients in each group was 456. Smaller reductions in hemoglobin and hematocrit （10.9 g vs 17.6 g and 3.6% vs 4.7%, respectively） were found in the noncystostomy group. In addition, patients undergoing surgery without cystostomy had their catheters removed earlier （4.6 days vs 5.2 days）, required shorter postoperative stays in the hospital （5.1 days vs 6.0 days）, and were at lower risk of operative complications （5.7% vs 9.2%）, especially bleeding requiring blood transfusion （2.9% vs 6.1%）. Similar findings were observed in cohorts of prostates of 30-80 ml and prostates 〉80 ml. Furthermore, among patients with a resection weight 〉42.5 g or surgical time 〉90 min, or even propensity-matched patients based on surgical time, those with cystostomy seemed to be at a higher risk of operative complications. These results suggest that M-TURP without suprapubic cystostomy is a safe and effective method, even among patients with larger prostates, heavier estimated resection weights, and longer surgical times.

关键词： benign prostatic hyperplasia complication suprapubic cystostomy transurethral resection of the prostate transurethralresection syndrome

Higher-Ordered Actin Structures Remodeled by Arabidopsis ACTIN-DEPOLYMERIZING FACTOR5 Are Important for Pollen Germination and Pollen Tube Growth

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Molecular Plant 2017年第8期10卷 1065-1081页

作者： Jingen Zhu Qiong Nan Tao Qin Dong Qian Tonglin Mao Shunjie Yuan Xiaorong Wu Yue Niu Qifeng Bai Lizhe An yun xiang MOE Key Laboratory of Cell Activities and Stress Adaptations School of Life Sciences Lanzhou University Lanzhou 730000 China State Key Laboratory of Plant Physiology and Biochemistry Department of Plant Sciences College of Biological Sciences China Agricultural University Beijing 100193 China

Dynamics of the actin cytoskeleton are essential for pollen germination and pollen tube growth. ACTIN- DEPOLYMERIZlNG FACTORs （ADFs） typically contribute to actin turnover by severing/depolymerizing actin filaments. Recently, we demonstrated that Arabidopsis subclass III ADFs （ADF5 and ADF9） evolved F-actin-bundling function from conserved F-actin-depolymerizing function. However, little is known about the physiological function, the evolutional significance, and the actin-bundling mechanism of these neo- functionalized ADFs. Here, we report that loss of ADF5 function caused delayed pollen germination, retarded pollen tube growth, and increased sensitive to latrunculin B （LatB） treatment by affecting the generation and maintenance of actin bundles. Examination of actin filament dynamics in living cells revealed that the bundling frequency was significantly decreased in adf5 pollen tubes, consistent with its biochem- ical functions. Further biochemical and genetic complementation analyses demonstrated that both the N- and C-terminal actin-binding domains of ADF5 are required for its physiological and biochemical functions. Interestingly, while both are atypical actin-bundling ADFs, ADF5, but not ADF9, plays an important role in mature pollen physiological activities. Taken together, our results suggest that ADF5 has evolved the function of bundling actin filaments and plays an important role in the formation, organization, and maintenance of actin bundles during pollen germination and pollen tube growth.

关键词： actin cytoskeleton atypical ADF isovariant ADF5 actin bundles pollen germination pollen tube growth

KIC 5197256:an eclipsing binary containing a δ Scuti variable star

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Research in Astronomy and Astrophysics 2021年第9期21卷 111-123页

作者： Cheng-Long Lv Ali Esamdin Jun-Hui Liu xiang-yun Zeng Tao-Zhi Yang Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830011China University of Chinese Academy of Sciences Beijing 100049China Department of Astronomy Xiamen UniversityXiamen 361005China School of Physics Xi'an Jiaotong UniversityXi’an 710049China

This paper reports analysis of an eclipsing binary system KIC 5197256 with aδSct variable *** light-curve modeling,several stellar parameters are derived,e.g.,temperature,mass,and mass *** O-C diagram is a straight line with a negative slope which means that its period is almost constant for about 2 *** analyses are performed for the residual light curve after subtracting the binary *** frequency spectrum reveals that one component star is aδScuti *** frequency separation is cross-identified with the histogram graph and the Fourier transform *** on the large separation and density relationship,the mean density of theδSct component is estimated to be 0.05 g·*** frequencies with the same frequency spacing in the range of 25 d-1-34 d-1 are ***,the pulsation amplitudes ofδSct stars increase with decreasing of rotations,so we propose that KIC 5197256 might have a relatively large rotational velocity,and the frequency f10 might be the rotation frequency.

关键词： binaries:eclipsing-stars:individual:KIC 5197256 stars:variables:δScuti stars:oscillations

Synthesis and Structural Characterization of One-dimensional Polynuclear Complex [La(bipyN_2O_2)(TFA)_3]_n

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Chinese Chemical Letters 2000年第10期11卷 935-936页

作者： Wen xiang ZHU, yun HE (Department of Chemistry, Beijing Normal University, Beijing 100875) (Department of Pharmacy, Beijing Staff Medical College, Beijing 100036) Department of Chemistry Beijing Normal University Department of Pharmacy Beijing Staff Medical College

A novel polymeric complex [La(bipyN2O2)(TFA)3]n(TFA= trifluoroacetylacetone) was prepared. The X-ray structure analysis revealed that the complex has an infinite one-dimensional supramolecule structure with the 4,4'-bipyridyl-N,N'-dioxide as a bridge. La(III) is coordinated to eight oxygen atoms, six from three trifluoroacetylacetonate anions, two from two 4,4'-bipyridyl-N,N'-dioxide molecules.

关键词： Lanthanum polynuclear complex trifluoroacetylacetone 4,4'-bipyridyl-N,N'-dioxide.

Search for variable stars in the open cluster NGC 1245

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Research in Astronomy and Astrophysics 2021年第5期21卷 223-234页

作者： Dong-xiang Shen Yu Zhang Chun-Yan Li xiang-yun Zeng Guo-Liang Lv Chun-Hua Zhu Qing-Shun Hu Jin-Zhong Liu School of Physical Science and Technology Xinjiang UniversityUrumqi 830046China Xinjiang Astronomical Observatory National Astronomical ObservatoriesChinese Academy of SciencesUrumqi 830000China University of Chinese Academy of Sciences Beijing 100049China

We used the Nanshan 1 m telescope of Xinjiang Astronomical Observatory to investigate variable stars in the region of NGC 1245. We detected 55 variable stars in the field of view, 42 of them are newly discovered: six binaries, 22 pulsating stars, 14 unclassified variables. We discussed the physical properties and classifications of the variable stars through their light curves. The cross-matching with the members catalog of NGC 1245 suggests that 10 variable stars are identified as probable cluster members, which including one EW type binary, eight δ Scuti stars, and an unknown type variable star. Since the difference of the members catalog of the cluster and the limitations of the instrument, there are some huge differences in the variable list of NGC 1245 compared with the previous work.

关键词： open clusters and associations:individual(NGC 1245) stars:variables:general stars:variables:delta Scuti binaries:eclipsing