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Diagnosing SST Error Growth during ENSO Developing Phase in the BCC_CSM1.1(m) Prediction System

Advances in Atmospheric Sciences 2022年第3期39卷 427-442页

作者： Ben TIAN hong-Li ren Laboratory for Climate Studies&CMA-NJU Joint Laboratory for Climate Prediction Studies National Climate CenterChina Meteorological AdministrationBeijing 100081China State Key Laboratory of Severe Weather Institute of Tibetan Plateau&Polar MeteorologyChinese Academy of Meteorological SciencesBeijing 100081China Department of Atmospheric Science School of Environmental StudiesChina University of GeoscienceWuhan 430074China

In this study, the predictability of the El Nino-South Oscillation(ENSO) in an operational prediction model from the perspective of initial errors is diagnosed using the seasonal hindcasts of the Beijing Climate Center System Model,BCC;SM1.1(m). Forecast skills during the different ENSO phases are analyzed and it is shown that the ENSO forecasts appear to be more challenging during the developing phase, compared to the decay phase. During ENSO development, the SST prediction errors are significantly negative and cover a large area in the central and eastern tropical Pacific, thus limiting the model skill in predicting the intensity of El Nino. The large-scale SST errors, at their early stage, are generated gradually in terms of negative anomalies in the subsurface ocean temperature over the central-western equatorial Pacific,featuring an error evolutionary process similar to that of El Nino decay and the transition to the La Nina growth ***, for short lead-time ENSO predictions, the initial wind errors begin to play an increasing role, particularly in linking with the subsurface heat content errors in the central-western Pacific. By comparing the multiple samples of initial fields in the model, it is clearly found that poor SST predictions of the Nino-3.4 region are largely due to contributions of the initial errors in certain specific locations in the tropical Pacific. This demonstrates that those sensitive areas for initial fields in ENSO prediction are fairly consistent in both previous ideal experiments and our operational predictions,indicating the need for targeted observations to further improve operational forecasts of ENSO.

关键词： ENSO prediction initial errors error evolution SST

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Infectious Behavior in Photo-oxidation of Polymers

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Chinese Journal of Polymer Science 2020年第3期38卷 248-256,I0006页

作者： Xuan Liu xiao-Peng ren Rui Yang Department of Chemical Engineering Tsinghua University

When a polymer is used together with others,its aging process will be affected by the adjacent *** infectious behavior between polymers makes the aging process more complex than that of an individual *** this study,infectious behavior in photooxidation of polymers was ***(PPs),an unstabilized PP and a commercial PP,were chosen as the infection *** typical polymers,high density polyethylene(HDPE),low density polyethylene(LDPE),polystyrene(PS),polycarbonate(PC),poly(ethylene terephthalate)(PET),and polyamide 6(PA6),were used as the *** degree of oxidation of the targets was evaluated by attenuated total reflection-Fourier transform infrared spectroscopy(ATR-FTIR).An accelerating effect of two infection sources on the photo-oxidation of the target polymers was *** infectious agents from the infection sources were detected by pyrolysis-gas chromatography-mass spectrometry(Py-GC-MS)and gas chromatography(GC).The acceleration effect of two main infectious agents,*** and acetic acid,on the photo-oxidation of the commercial PP was *** infectious effect of the infection source on the target polymer was considered to be a comprehensive result of the effects of a variety of infectious agents.

关键词： Photo-oxidation Infection source Infectious agent Polypropylene

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Redox-active nanoparticles for inflammatory bowel disease

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Nano Research 2021年第8期14卷 2535-2557页

作者： Qinjuan ren Si Sun xiao-Dong Zhang Department of Physics and Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology School of SciencesTianjin UniversityTianjin 300350China Tianjin Key Laboratory of Brain Science and Neural Engineering Academy of Medical Engineering and Translational MedicineTianjin UniversityTianjin 300072China

Homeostasis of gut microbiota is extremely essential for maintaining nutrient metabolism and regulating immunological *** increasing evidence suggests that inflammatory bowel disease(IBD)is strongly associated with dysregulation of gut *** activated inflammation,excessive reactive oxygen species(ROS)and reactive nitrogen species(RNS)produced by inflammatory cells play a detrimental role in regulating IBD and gut ***/RNS cause damage to the surrounding tissues,including nutrient absorption disorders,intestinal dysmotility and barrier ***,ROS/RNS provide terminal electron receptors for anaerobic respiration and support the bloom of facultative anaerobes,eventually causing gut microbiota ***-active nanoparticles(NPs)with catalytic properties or enzyme-like activities can effectively scavenge ROS/RNS,and selectively target inflamed sites via ultrasmall size-mediated enhanced permeation and retention(EPR)effect,showing great potential to regulate IBD and maintain the homeostasis of gut *** addition,the widespread application of NPs in commercial products 1 has increased their accumulation in healthy organisms,and the biological effects on normal microbiota resulting from long-term exposure of NPs to gastrointestinal tract also need attention.

关键词： gut microbiota IBD ROS/RNS redox-active NPs

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Biliary cystadenocarcinoma diagnosed with real-time contrast-enhanced ultrasonography:Report of a case with diagnostic features

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World Journal of Gastroenterology 2010年第1期16卷 131-135页

作者： ren, xiao-Long Yan, Rui-Ling Yu, xiao-Hui Zheng, Ying Liu, Jun-E Hou, xiao-Bin Zuo, Si-Yang Fu, xiao-Yan Chang, hong Lu, Jian-hong Gen Hosp Lanzhou Mil Area Command Dept Ultrasonog Lanzhou 730050 Gansu Peoples R China

Biliary cystadenocarcinoma is a very rare malignant cystic tumor of the liver,which is often misdiagnosed due to a poor recognition of *** report a case of a 60-year-old man with biliary cystadenocarcinoma with his real time contrast enhanced ultrasound(CEUS)characteristics compared to those of computed tomography(CT)and magnetic resonance imaging(MRI),which were correlated with the surgical and pathologic *** wall enhancement,internal septations and intra-cystic solid portions in the arterial phase were observed on CEUS after contrast agent *** enhancement was washed out progressively and depicted as hypo-enhancement in the portal and late *** revealed a large irregular cystic lesion in the left liver lobe with no clear septations and solid *** showed an irregular cystic occupying lesion with septations.

关键词： Biliary cystadenocarcinoma Cystic neoplasm Hepatic disease Contrast medium Ultrasonography

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在他乡良缘更好吗——迁移流动对个人婚姻匹配的影响

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山西财经大学学报 2025年第1期47卷 48-59页

作者：黄小丽丁金宏王俊松华东师范大学社会发展学院华东师范大学地理科学学院

基于2010—2021年中国综合调查数据，实证研究迁移流动对婚姻匹配的影响。结果表明：婚前迁移显著提升了匹配到配偶的社会经济地位，其中自身社会经济地位提高和择偶场域改善是实现配偶社会经济地位提升的重要解释机制；与婚后迁移者相... 详细信息

基于2010—2021年中国综合调查数据，实证研究迁移流动对婚姻匹配的影响。结果表明：婚前迁移显著提升了匹配到配偶的社会经济地位，其中自身社会经济地位提高和择偶场域改善是实现配偶社会经济地位提升的重要解释机制；与婚后迁移者相比，婚前迁移通过拓展迁移者的社会交往，使其有机会结识社会经济地位更高的异性。异质性分析表明：相较于农业户籍，婚前迁移对非农户籍人群配偶质量的提升效应更显著；与未迁移人群相比，这种提升效应在中下阶层更明显。结论意味着，迁移流动有可能成为提升个体婚姻匹配质量的重要途径。

关键词：迁移流动婚姻匹配社会经济地位社会交往同质匹配择偶场域婚前迁移婚后迁移

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Mn、Zn、Sn掺杂CsPbI_(3)的稳定性和光电性质研究

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原子与分子物理学报 2025年第2期42卷 182-188页

作者：张仁杰陶红帅郝启圣内蒙古工业大学理学院呼和浩特010051

采用基于密度泛函理论的第一性原理,计算了本征CsPbI_(3)和Mn、Zn、Sn掺杂体系的形成能、电子结构和光学性质.研究结果表明:Mn、Zn、Sn的掺入减小了材料晶格常数,Mn原子掺入CsPbI_(3)晶体结构使得体系的磁矩由0变为5.00μ_(B),丰富了材... 详细信息

采用基于密度泛函理论的第一性原理,计算了本征CsPbI_(3)和Mn、Zn、Sn掺杂体系的形成能、电子结构和光学性质.研究结果表明:Mn、Zn、Sn的掺入减小了材料晶格常数,Mn原子掺入CsPbI_(3)晶体结构使得体系的磁矩由0变为5.00μ_(B),丰富了材料磁性.与Zn掺杂体系相比,Mn、Sn掺杂体系更为稳定.Mn掺杂体系增大了材料带隙,Zn、Sn的掺入使材料带隙分别减小了30.2%和16.2%,有利于电子极化跃迁,但Zn掺入使CsPbI_(3)材料转变为间接带隙半导体.在可见光区域中Mn、Zn、Sn掺杂体均表现出优异的光学性能,Sn掺杂体系效果最佳.这些研究结果为实验方面CsPbI_(3)材料的掺杂改性提供了数据支持,有利于CsPbI_(3)钙钛矿在光电领域的应用.

关键词： CsPbI_(3) 第一性原理电子结构光学性质

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Novel Crystallization Behaviors of Zr-Based Metallic Glass Under Thermo-Mechanical Coupled Fatigue Loading Condition

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Acta Metallurgica Sinica(English Letters) 2019年第7期32卷 797-802页

作者： Zhi-Chao Ma xiao-Xi Ma hong-Wei Zhao Fu Zhang Li-Ming Zhou Lu-Quan ren School of Mechanical and Aerospace Engineering Jilin University Changchun 130025 China Key Laboratory of Bionic Engineering Ministry of Education Jilin University Changchun 130025. China

Novel crystallization behaviors of Zr55Cu30Al10Ni5 bulk metallic glass are investigated. On the one hand, mixed oxides, including CuO, CuAlO2, CuA12O4 and ZrO2, show sequential oxidation process determined by coupling effects of specific cyclic load and temperature. On the other hand, at a temperature (100℃) by far lower than Tg of 412 ℃, under cyclic loading condition, non-oxidized binary alloy CuZr2 is precipitated;the thermo-mechanical coupled effects of temperature below Tg, and fatigue accumulation on the non-oxidized crystallization behaviors are revealed. Meanwhile, at a constant temperature of 400 ℃, by comparing among the XRD patterns, respectively, obtained from tensile, creep and fatigue fractures, the dominating effect of cyclic load on the generation of non-oxidized CuZr2 is verified. Furthermore, the crystallization behavior of amorphous phases under cyclic loading condition is observed through TEM micrograph and diffraction pattern at 100℃.

关键词： Bulk metallic glass Fatigue Thermo-mechanical coupling Crystallization

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文旅数字化发展的理论与实践研究——以四川为例

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四川旅游学院学报 2025年第1期 52-58页

作者：何小东易敏任啸成都大学四川成都610044 西南民族大学四川成都610041 四川省旅游投资集团四川成都610147

四川省高度关注文旅产业数字化转型,积极探索“数字+文旅”发展路径,各级政府相继出台系列文件,助力数字文旅发展。文章以四川省数字文旅资金投入情况、数字化项目建设情况、文旅重点行业数字化建设情况等为基础,分析四川数字文旅发展... 详细信息

四川省高度关注文旅产业数字化转型,积极探索“数字+文旅”发展路径,各级政府相继出台系列文件,助力数字文旅发展。文章以四川省数字文旅资金投入情况、数字化项目建设情况、文旅重点行业数字化建设情况等为基础,分析四川数字文旅发展现存问题,探索数字文旅发展路径,并围绕管理、市场、产品等方面提出四川数字文旅发展建议,以期推动四川省数字文旅融合高质量发展,并为其他地区数字文旅发展提供相关借鉴。

关键词：数字文旅高质量发展四川

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A-Browder's Theorem and Generalized a-Weyl's Theorem

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Acta Mathematica Sinica,English Series 2007年第5期23卷 951-960页

作者： xiao hong CAO College of Mathematics and Information Science Shaanxi Normal University

Two variants of the essential approximate point spectrum are discussed. We find for example that if one of them coincides with the left Drazin spectrum then the generalized a-Weyl＇s theorem holds, and conversely for ... 详细信息

关键词： a-Browder's theorem generalized a-Weyl's theorem spectrum

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Lattice Structure for Paraunitary Linear-phase Filter Banks with Accuracy

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Acta Mathematica Sinica,English Series 2006年第3期22卷 679-688页

作者： hong Ying xiao School of Mathematics Xiamen University

Multivariate filter banks with a polyphase matrix built by matrix factorization （lattice structure） were proposed to obtain orthonormal wavelet basis. On the basis of that, we propose a general method of constructing filter banks which ensure second and third accuracy of its corresponding scaling function. In the last part, examples with second and third accuracy are given.

关键词： Paraunitary Linear-phase Accuracy

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