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Metal abundance and kinematical properties of the M81 globular cluster system

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Research in Astronomy and Astrophysics 2013年第4期13卷 399-410页

作者： Jun Ma Zhen-Yu Wu Tian-Meng Zhang Song Wang zhou fan Jiang-Hua Wu Hu Zou Cui-Hua Du Xu zhou Qi-Rong Yuan National Astronomical Observatories Chinese Academy of Sciences Key Laboratory of Optical Astronomy National Astronomical ObservatoriesChinese Academy of Sciences Graduate University of Chinese Academy of Sciences Department of Astronomy Beijing Normal University College of Physical Sciences Graduate University of Chinese Academy of Sciences Department of Physics Nanjing Normal University

We present metal abundance properties of 144 globular clusters associated with M81. These globulars represent the largest globular cluster sample in M81 till now. Our main results are： the distribution of metallicities is bimodal, with metallicity peaks at [Fe/H] -1.51 and -0.58, and the metal-poor globular clusters tend to be less spatially concentrated than the metal-rich ones; the metal-rich globular clusters in M81 do not demonstrate a centrally concentrated spatial distribution like the metalrich ones in M31 do; like our Galaxy and M31, the globular clusters in M81 have a small radial metallicity gradient. These results are consistent with those obtained from a small sample of M81 globular clusters. In addition, this paper shows that there is evidence that a strong rotation of the M81 globular cluster system around the minor axis exists, and that rotation is present in the metal-rich globular cluster subsample, but the metal-poor globular cluster subsample shows no evidence of rotation. The most significant difference between the rotation of the metal-rich and metal-poor globular clusters occurs at intermediate projected galactocentric radii. Our results confirm the conclusion of Schroder et al. that M81＇s metal-rich globular clusters at intermediate projected radii are associated with a thick disk of M81.

关键词： galaxies: individual (M81) -galaxies: star clusters globular clusters:general

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Test-Driven Feature Extraction of Web Components

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Journal of Computer Science & Technology 2022年第2期37卷 389-404页

作者： Yong-Hao Long Yan-Cheng Chen Xiang-Ping Chen Xiao-Hong Shi fan zhou School of Computer Science and Engineering National Engineering Research Center of Digital Life Sun Yat-sen UniversityGuangzhou 510006China School of Design The Hong Kong Polytechnic UniversityHong KongChina Guangdong Key Laboratory for Big Data Analysis and Simulation of Public Opinion The School of Communication and DesignSun Yat-sen UniversityGuangzhou 510006China School of Information Technology and Engineering Guangzhou College of CommerceGuangzhou 511363China

With the growing requirements of web applications,web components are developed to package the implementation of commonly-used features for *** some cases,the developer may want to reuse some features which cannot be customized by the component’s ***/she has to extract the implementation by *** is labor-intensive and *** the widely-used test cases which can be useful to specify the software features,a test-driven approach is proposed to extract the implementation of the desired features in web *** satisfaction of the user^requirements is transformed into the passing rate of user-specified test *** this way,the quality of the extraction result can be evaluated ***,a record/replay-based GUI test generation method is proposed to ensure that the extraction result has the correct GUI *** extract the feature implementation,a hierarchical genetic algorithm is proposed to find the code snippet that can pass all the tests and has the approximate smallest *** compare our method with two existing feature extraction *** result shows that our method can extract the correct implementation with the minimum size.A human-subject study is conducted to show the effectiveness and weaknesses of our method in helping users extract the features.

关键词： feature extraction genetic algorithm graphical user interface software reuse

World Federation of Acupuncture-Moxibustion Societies(WFAS)Technical Benchmark of Acupuncture and Moxibustion:Cupping

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World Journal of Acupuncture-Moxibustion 2024年第3期34卷 222-226页

作者： Dan LI Yu-Jia LI Yi GUO Xue ZHAO Xiao-Dong WU Xiao-Ning YUAN Ono YASUO Jia-Yin ZHANG Yu-fan zhou Yi YANG Tian-Yi ZHAO Bo CHEN Zi-Qi WANG Hao-Yang WEN Tian-Cong FU Ze-Lin CHEN Jun JIN Tianjin University of Traditional Chinese Medicine Tianjin 301617China International Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion Tianjin300381China Tianjin Institute of Traditional Chinese Medicine standardization Tianjin 301617China Institute of Acupuncture and Moxibustion China Academy of Chinese Medical SciencesBejing 100700China College of Traditional Chinese Medicine and Pharmacology Canada Toronto M1T3J3Canada Kounandia CARE Nigata-shi951-8106Japan Tung Shin Hospital Kuala Lumpur 55100Malaysia Harmony TCM Studio Queensland 4113Australia

World Federation of Acupuncture-Moxibustion Societies(WFAS)Technical Benchmark of Acupuncture and Moxibustion:Cupping,developed under the leadership of Tianjin University of Traditional Chinese Medicine,was approved by *** technical benchmark was issued on October 9,2023,and implemented on December 31,*** main contents include the scope,normative references,terms and definitions,procedures and rules,and *** article focuses on the above contents,an outlook on the application,popularization,and update plan of this technical benchmark is proposed.

关键词： Cupping Technical benchmark World Federation of Acupuncture-Moxibustion Societies(WFAS) Standard

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Evolution of tribo-magnetization during sliding of ferromagnetic materials

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Friction 2024年第5期12卷 906-918页

作者： Fumin GAO Laibin ZHANG Jin zhou Yi XIONG Jing WU Jianchun fan China University of Petroleum-Beijing Beijing102249China Key Laboratory of Oil and Gas Safety and Emergency Technology Ministry of Emergency ManagementBeijing102249China

Sliding-induced subsurface microstructure evolution is believed to be decisive for determining the friction and wear performance of metallic contacts as well as the development of *** expects to develop a new prediction method of wear state by elucidating the correlation between subsurface microstructure evolution and corresponding magnetic domain ***,subsurface microstructure evolution including crystal and magnetic domain under tribological action is investigated *** results demonstrate that dislocation mediated plastic deformation decisively influences microstructural changes during tribological contact,further determining the magnetic domain ***,sliding-induced plastic deformation causes an increase in the width of magnetic domains,but depth-dependent derived microstructure formed under severe plastic deformation such as the refined grains and sub-grains,in turn,promoted the refinement of magnetic domains and their discontinuity,forming depth-dependent magnetic domain *** results are helpful to clarify the evolution of tribo-magnetization and the pinning effect of dislocations on magnetic domains.

关键词： tribology magnetic domain microstructure tribo-magnetization dislocations

Injection of a Self-propelled Polymer into a Small Circular Cavity

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Chinese Journal of Polymer Science 2024年第6期42卷 886-894页

作者： Chao Wang Yan-Li zhou Xiao Yang fan Wu Meng-Bo Luo Department of Physics Taizhou UniversityTaizhou318000China Department of Physics Zhejiang UniversityHangzhou310027China

The injection of a polymer chain into a small circular cavity under tangential self-propelled force is studied by using Langevin dynamics *** indicate that the injection dynamics of the active polymer shows strong correlation with the polymer conformation inside the cavity depending on the polymer rigidity(k_(b)).The injection timeτvaries nonmonotonously with increasing k_(b),and reaches its minimum at k_(b)^(*).When k_(b) is small(k_(b)≪k_(b)^(*)),the polymer is nearly random coil in the cavity,and spends a long time at the final stage of the injection process due to the large repulsion between monomers inside the *** k_(b) is moderate(k_(b)∼k_(b)^(*)),the part of polymer inside the cavity forms spiral configuration under the tangential active force,and the whole polymer moves synchronously with a constant velocity during the injection process,leading to a small injection *** k_(b) is large(k_(b)≫k_(b)^(*)),the polymer is nearly straight at the initial stage of the injection process,and takes a long time to bend itself,leading to a large injection time.

关键词： Active Polymer Injection Dynamics Simulation

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曲周县国家农业绿色发展先行区建设路径分析

河北农业科学 2024年第4期28卷 93-96页

作者：周繁梁腾云张戈吕佳情贾丽霞河北省农业项目规划中心河北石家庄050011 河北省乡村振兴促进中心河北石家庄050011 河北省农林科学院农业信息与经济研究所河北石家庄050051

建立农业绿色发展先行区是实现农业可持续发展的重要举措,对于新发展道路和保障粮食安全具有重要意义。基于河北省曲周国家农业绿色发展先行区建设,从技术创新、面源污染治理、品牌宣传、主体培育、农旅结合5个方面阐述了先行区的发展现... 详细信息

建立农业绿色发展先行区是实现农业可持续发展的重要举措,对于新发展道路和保障粮食安全具有重要意义。基于河北省曲周国家农业绿色发展先行区建设,从技术创新、面源污染治理、品牌宣传、主体培育、农旅结合5个方面阐述了先行区的发展现状,深入分析了该地区农业绿色发展过程中存在的问题,并提出了“深化县校合作—应用数字科技—坚持政策创新—聚焦绿色生态—加强政府领导”的发展路径。本研究可为推动曲周县国家农业绿色发展提供技术参考。

关键词：曲周县农业绿色发展先行区技术创新

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Cystic fibrosis transmembrane conductance regulator prevents ischemia/reperfusion induced intestinal apoptosis via inhibiting PI3K/AKT/NF-κB pathway

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World Journal of Gastroenterology 2022年第9期28卷 918-932页

作者： Zhi-Wei Dong Hui Liu Fei-Fei Su Xiao-zhou fan Yong Zhang Peng Liu Department of General Surgery Air Force Medical CenterBeijing 100000China Department of Gastroenterology Second Affiliated Hospital of Dalian Medical UniversityDalian 116023Liaoning ProvinceChina Department of Cardiology Air Force Medical CenterBeijing 100000China Department of Ultrasound Air Force Medical CenterBeijing 100000China School of Chemistry and Biological Engineering University of Science and TechnologyBeijing 100000China Research Laboratory of Aero-Medical Support Air Force Medical CenterBeijing 100000China

BACKGROUND Intestinal ischemia/reperfusion(I/R)injury is a fatal syndrome that occurs under many clinical *** apoptosis of intestinal cells caused by ischemia can cause cell damage and provoke systemic dysfunction during ***,the mechanism of I/R-induced apoptosis remains *** fibrosis transmembrane conductance regulator(CFTR)is a cAMP-activated chloride *** researchers have paid attention to its role in intestinal I/R injury,or the relationship between CFTR and intestinal apoptosis induced by hypoxia/reoxygenation(H/R).AIM To investigate the effects of CFTR on I/R-induced intestinal apoptosis and its underlying molecular *** An intestinal I/R injury model was established in mice with superior mesenteric artery occlusion, and Caco2 cells were subjected to H/R for the simulation of I/R in *** results suggested that CFTR overexpression significantly increased the Caco2 cell viability anddecreased cell apoptosis induced by the H/R. Interestingly, we found that the translocation of p65,an NF-κB member, from the cytoplasm to the nucleus after H/R treatment can be reversed by theoverexpression of CFTR, the NF-κB P65 would return from the nucleus to the cytoplasm asdetermined by immunostaining. We also discovered that CFTR inhibited cell apoptosis in theH/R-treated cells, and this effect was significantly curbed by the NF-κB activator BA, AKTinhibitor GSK690693 and the PI3K inhibitor LY294002. Moreover, we demonstrated that CFTRoverexpression could reverse the decreased PI3K/AKT expression induced by the I/R treatment invivo or H/R treatment in *** results of the present study indicate that the overexpression of CFTR protects Caco2 cells fromH/R-induced apoptosis;furthermore, it also inhibits H/R-induced apoptosis through thePI3K/AKT/NF-κB signaling pathway in H/R-treated Caco2 cells and intestinal tissues.

关键词： Apoptosis Cystic fibrosis transmembrane conductance regulator Intestinal ischemia-reperfusion injury PI3K/AKT/NF-κB Hypoxia/reoxygenation Caco2 cells

In-situ observation and mechanism of calcium–magnesium–alumina–silicate(CMAS)melts-induced degradation of RE_(2)SiO_(5)(RE=Tb,Dy,Ho,Y,Er,Tm,and Yb)ceramics at 1500℃

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Journal of Advanced Ceramics 2023年第12期12卷 2315-2330页

作者： Zhilin Tian Keyu Ming Liya Zheng Zhilin Chen fan zhou Peng Liu Zihao Qiu Donghui Wei Bin Li Jingyang Wang School of Materials Shenzhen Campus of Sun Yat-sen UniversityShenzhen 518107China School of Metallurgy Northeastern UniversityShenyang 110819China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China

Rare earth(RE)silicate is one of the most promising environmental barrier coatings for silicon-based ceramics in gas turbine ***,calcium-magnesium-alumina-silicate(CMAS)corrosion becomes much more serious and is the critical challenge for RE silicate with the increasing operating ***,it is quite urgent to clarify the mechanism of high-temperature CMAS-induced degradation of RE silicate at relatively high ***,the interaction between RE_(2)SiO_(5) and CMAS up to 1500℃was investigated by a novel high temperature in-situ observation *** temperature promotes the growth of the main reaction product(Ca_(2)RE_(8)(SiO_(4))6O_(2))fast along the[001]direction,and the precipitation of short and horizontally distributed Ca_(2)RE_(8)(SiO_(4))6O_(2) grains was accelerated during the cooling *** increased temperature increases the solubility of RE elements,decreases the viscosity of CMAS,and thus elevates the corrosion reaction rate,making RE_(2)SiO_(5) fast interaction with CMAS and less affected by RE element species.

关键词： calcium-magnesium-alumina-silicate(CMAS)corrosion environmental barrier coating rare earth(RE)silicate high temperature

Influence of Different Gonadotropin-releasing Hormone Agonist Administration Methods on Pregnancy Outcomes of Patients Undergoing In-vitro Fertilization-embryo Transfer

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Current Medical Science 2019年第3期39卷 437-441页

作者： Li WU Xin-ling REN Wen CHEN Bo HUANG Yi-fan zhou Lei JIN Reproductive Medicine Center Department of Obstetrics and Gynecology Tongji Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan 430030 China

This study aimed to investigate the effect of different gonadotropin-releasing hormone agonist (GnRH-a) administration methods on pregnancy outcomes of patients undergoing in-vitro fertilization-embryo transfer (IVF-ET). Clinical data of 5217 patients who underwent IVF-ET were retrospectively analyzed. Patients were divided into the long-acting GnRH-a group (n=1330) and the short-acting GnRH-a group (w=3887) based on their various treatment plans. The clinical and laboratory embryo data and clinical pregnancy outcomes were compared between the two groups. The results showed that there were no significant differences in the age, infertility, primary/secondary infertility rate, IVF rate, body mass index (BMI), antral follicle counting (AFC), folliclestimulating hormone (FSH) level, and the number of transplanted embryos between the two groups (P>0.05). There were no significant differences in the oocyte numbers, M II rate, fertilization rate, cleavage rate and blastocyst formation rate (P>0.05) between the two groups. The gonadotropin (Gn) using days, Gn dose and endometrial thickness were significantly greater in the long-acting GnRH-a group than those in the short-acting GnRH-a group (P<0.01). Additionally, the estradiol (E2) levels, blastocyst freezing rate, embryo utilization rate, transplant cancellation rate and abortion rate were significantly lower in the long-acting GnRH-a group than those in the shortacting GnRH-a group (P<0.01). The clinical pregnancy rate and embryo implantation rate were significantly higher in the long-acting GnRH-a group than in the short-acting GnRH-a group (P<***). It was concluded that use of long-acting GnRH-a can effectively reduce the transplant cancellation rate and improve the clinical pregnancy rate of the fresh cycle.

关键词： gonadotropin-releasing hormone agonist long-acting short-acting in-vitro fertilization-embryo transfer clinical pregnancy rate