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Large Deviation Principle for the Two-dimensional Stochastic Navier-Stokes Equations with Anisotropic Viscosity

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Acta Mathematicae Applicatae Sinica 2023年第3期39卷 511-549页

作者： Bing-guang chen Xiang-chan ZHU Academy of Mathematics and Systems Science Chinese Academy of SciencesBeijing 100190China Department of Mathematics University of BielefeldD-33615 BielefeldGermany

In this paper we establish the large deviation principle for the the two-dimensional stochastic Navier-Stokes equations with anisotropic viscosity both for small noise and for short *** proof for large deviation principle is based on the weak convergence *** small time asymptotics we use the exponential equivalence to prove the result.

关键词： large deviation principle stochastic Navier-Stokes equations anisotropic viscosity small time asymptotics weak convergence approach

On the Small Time Asymptotics of the Dynamical Φ_(1)^(4)Model

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Acta Mathematica Sinica,English Series 2021年第3期37卷 436-446页

作者： Bing Guang chen Xiang chan ZHU Academy of Mathematics and Systems Science Chinese Academy of ScienceBeijing 100190P.R.China Department of Mathematics University of BielefeldD-33615 BielefeldGermany

In this paper,we establish a small time large deviation principle(small time asymptotics)for the dynamicalΦ_(1)^(4)model,which not only involves study of the space-time white noise with intensity√ε,but also the inv... 详细信息

关键词： Φ_(1)^(4)model space-time white noise small time asymptotics large deviation

昆明地区婴幼儿葡萄糖-6-磷酸脱氢酶缺乏症基因突变分析

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中华检验医学杂志 2024年第3期47卷 293-300页

作者：陈国祺朱宝生贺静赵苑村镡颖林军岳周笑颜陈红章印红昆明理工大学附属医院昆明650500 昆明理工大学附属医院云南省第一人民医院医学遗传科国家卫生健康委西部优生与出生缺陷防控重点实验室云南省出生缺陷与遗传病研究重点实验室云南省出生缺陷与罕见病临床研究中心昆明650032

目的分析昆明地区婴幼儿葡萄糖-6-磷酸脱氢酶(G6PD)缺乏症的基因突变特点。方法选取2018年1月1日至2020年12月31日在昆明市出生的15533例(男7994例,女7539例)婴幼儿,年龄5(4,9)d,采用荧光定量法、多色熔解曲线分析法(MMCA)和Sanger测序... 详细信息

目的分析昆明地区婴幼儿葡萄糖-6-磷酸脱氢酶(G6PD)缺乏症的基因突变特点。方法选取2018年1月1日至2020年12月31日在昆明市出生的15533例(男7994例,女7539例)婴幼儿,年龄5(4,9)d,采用荧光定量法、多色熔解曲线分析法(MMCA)和Sanger测序对葡萄糖-6-磷酸脱氢酶活性和基因突变类型进行检测。采用微滴式数字PCR技术(ddPCR)对一例新发变异家系进行定量分析,确定家系成员体细胞突变嵌合比例,同时对新发变异进行蛋白结构模型分析和致病性预测。采用SPSS 26.0统计软件进行数据分析,不同性别间G6PD酶活性和基因突变阳性检出率采用χ^(2)检验,G6PD基因突变组间酶活性的比较采用单因素方差分析。结果15533例婴幼儿中G6PD酶活性检出阳性143例(男129例,女14例),检出率为0.92%(143/15533),男女检出率差异具有统计学意义(χ^(2)=96.76,PA、c.1024C>T、c.1388G>A和c.1376G>T 4种突变类型最为常见,占全部突变类型的74.70%(62/83)。c.1376G>T的平均酶活性最低,与另外3种突变的平均酶活性相比,差异均有统计学意义(P均C新发变异男性患儿,预测为致病性变异。ddPCR证明患儿母亲为c.242G>C变异嵌合体,嵌合比例为6.66%。结论昆明地区G6PD缺乏症基因突变以c.487G>A为主,检出一例G6PD c.242G>C新发变异。ddPCR技术可辅助用于突变嵌合体比例检测。

关键词：葡糖磷酸脱氢酶缺乏葡萄糖-6-磷酸脱氢酶缺乏症 G6PD活性荧光定量法多色熔解曲线分析微滴式数字PCR 基因突变

Diagnosis and Treatment of Uveal Effusion Syndrome: a Case Series and Literature Review

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Chinese Medical Sciences Journal 2011年第4期26卷 231-236页

作者： chan Wu Fang-tian Dong Hua Zhang you-xin chen Rong-ping Dai Ke Tan Department of Ophthalmology Peking Union Medical College HospitalChinese Academy of Medical Sciences ＆ Peking Union Medical College Beijing 100730 China

Objective To explore the diagnosis, classification, and management of uveal effusion syndrome (UES). Methods The clinical data of 10 patients diagnosed with UES in our hospital between 1990-2010 were extracted from hospital records and analyzed, including ophthalmologic examination, ophthalmologic ultrasonography, ultrasound biomicroscopy (UBM), fundus fluorescence angiography (FFA), indocyanine green (ICG) angiography, surgical procedures, and outcomes. Results The fundus examination of all impacted eyes showed bullous retinal detachment shifting with head position, confirmed by ultrasonography revealing retinal and choroidal detachment. UBM showed annular peripheral ciliochoroidal detachment in all cases. FFA was performed in 5 patients and revealed leopard spots without leakage from choroid into subretinal space. ICG angiograpy was performed in 3 patients and demonstrated diffused granular marked hyperfluorescence in the choroidal fluorescence in the very early phase, which increased with time and persisted until the late phase. Four eyes of 2 patients underwent full-thickness sclerectomies and 1 eye of 1 patient underwent subscleral sclerectomy, all of whom achieved reattachment of the retina without recurrence during 1-year follow-up. Conclusions Comprehensive preoperative evaluation, including ophthalmologic ultrasonography, computed tomography, and magnetic resonance imaging, is crucial for accurate classification of UES and selection of proper management strategy. Surgical treatment can achieve optimal clinical outcomes for type 1 and type 2 UES.

关键词： uveal effusion syndrome idiopathic classification sclerectomy

Functional Janus Membranes:Promising Platform for Advanced Lithium Batteries and Beyond

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Energy & Environmental Materials 2023年第5期6卷 142-158页

作者： Dan chan Yunfei Liu you Fan Huibo Wang Shi chen Tianwei Hao Heng Li Zhengshuai Bai Huaiyu Shao Guichuan Xing Yanyan Zhang Yuxin Tang College of Chemical Engineering Fuzhou University Fuzhou 350116China Institute of Applied Physics and Materials Engineering University of MacaoMacao 999078China Department of Civil and Environmental Engineering Faculty of Science and Technology University of MacaoMacao 999078China State Key Laboratory of High-Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China

Separators or electrolyte membranes are recognized as the key components to guarantee ion transport in rechargeable ***,the ever-growing applications of the battery systems for diverse working environments bring new challenges,which require advanced battery membranes with high thermal stability,excellent mechanical strength,high voltage tolerance,***,it is highly desirable to design novel methods/concepts to solve the current challenges for battery membranes through understanding the mechanism of novel phenomena and electrochemical reactions in battery systems working under unconventional ***,the new emerging Janus separators or electrolyte membranes with two or more distinct chemical/physical properties arising from their asymmetric structure and composition,are promising to address the above challenges via rational design of their targeted *** this end,in this review,we first briefly cover the current challenges of the traditional battery membrane for battery devices working in unconventional ***,the state-of-art developments of the rational design of Janus membranes to overcome the above challenges for diverse battery applications are ***,we outline these latest developments,challenges,and future potential directions of the Janus *** review is aimed to provide basic guidance for developing functional separators or electrolyte membranes for advanced batteries.

关键词： batteries Janus membranes separators solid-state electrolytes

安徽省科研失信治理研究——基于全省科研诚信现状调查的视角

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安徽师范大学学报（自然科学版） 2024年第3期47卷 294-300页

作者：陈子婵王晓芳安徽省科技厅科技评估与监管中心安徽合肥230088

为深入了解安徽省科研失信行为以及科研诚信建设现状,以科研诚信问卷调查数据为基础,从科研失信发生及治理、科研诚信规定及政策、科研失信举报及惩戒等方面进行统计分析,同时结合安徽省科研失信典型案例,研究分析安徽省科研诚信现状及... 详细信息

为深入了解安徽省科研失信行为以及科研诚信建设现状,以科研诚信问卷调查数据为基础,从科研失信发生及治理、科研诚信规定及政策、科研失信举报及惩戒等方面进行统计分析,同时结合安徽省科研失信典型案例,研究分析安徽省科研诚信现状及存在的问题,提出相应的治理科研失信行为的对策建议,为安徽省科研诚信管理部门提供政策参考。

关键词：科研失信科研诚信问卷调查案例分析

Systemic Lupus Erythematosus and Antiphospholipid Syndrome Related Retinal Vasculitis Mimicking Ocular Cysticercosis: a Case Report

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Chinese Medical Sciences Journal 2015年第1期30卷 59-62页

作者： chan Wu Fang-tian Dong you-xin chen Qian Wang Rong-ping Dai Hua Zhang Department of Ophthalmology Peking Union Medical College Hospital Chinese Academy of Medical Sciences & Peking Union Medical College Department of Rheumatology Peking Union Medical College Hospital Chinese Academy of Medical Sciences & Peking Union Medical College

MAKING accurate and timely diagnosis is often challenging when patients with a systemic disease first present with ocular *** possibility that vasculitis associated with systemic lupus erythematosus(SLE)and antiphosph... 详细信息

关键词： systemic lupus erythematosus antiphospholipid syndrome retinal vasculitis cysticercosis

Large eddy simulation of a planar jet flow with nanoparticle coagulation

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Acta Mechanica Sinica 2006年第4期22卷 293-300页

作者： Mingzhou Yu Jianzhong Lin Lihua chen Tatleung chan Department of Mechanics State Key Laboratory of Fluid Power Transmission and Control Zhejiang University Hangzhou 310027 China China Jiliang University Hangzhou 310018 Research Centre for Combustion and Pollution Control Department of Mechanical Engineering The Hong Kong Polytechnic University Hung Hom Kowloon Hong Kong China

Coagulation and growth of nanoparticles subject to large coherent structures in a planar jet has been explored by using large eddy simulation. The particle field is obtained by employing a moment method to approximate the nanoparticle general dynamic equa- tion. An incompressible fluid containing particles of 1 nm in diameter is projected into a particle-free ambient. The results show that the coherent structures dominate the evolution of the nanoparticle number intensity, diameter and polydispersity distributions as the jet develops. In addition, the coherent structures act to increase the diffusion of particles, and the vortex rolling-up makes the particles distributing more irregularly while the vortex pairing causes particle distributions to become uniform. As the jet travels downstream, the time-averaged particle number concentration becomes lower in the jet core and higher in the outskirts, whereas the time- averaged particle mass over the entire flow field maintains unaltered, and the time-averaged particle diameter and geometric standard deviations grow and reach their maximum on the interface of the jet region and the ambient.

关键词： Nanoparticles Coagulation Planar jet Large eddy simulation Coherent structure

Challenges to quantitative applications of Landsat observations for the urban thermal environment

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Journal of Environmental Sciences 2017年第9期29卷 80-88页

作者： Feng chen Song Yang Kai Yin Paul chan School of Atmospheric Sciences Sun Yat-sen UniversityZhuhai 519082China Institute of Earth Climate and Environment System Sun Yat-sen UniversityOuangzhou 510275China Fujian Key Laboratory of Sensing and Computing.for Smart City Xiarnen UniversityXiarnen 361005China Institute of Remote Sensing and Digital Earth Chinese Academy of SciencesBeijing 10094China Climate Decision LLC BethesdaMDUSA

Since the launch of its first satellite in 1972, the Landsat program has operated continuously for more than forty years. A large data archive collected by the Landsat program significantly benefits both the academic community and society. Thermal imagery from Landsat sensors, provided with relatively high spatial resolution, is suitable for monitoring urban thermal environment. Growing use of Landsat data in monitoring urban thermal environment is demonstrated by increasing publications on this subject, especially over the last decade. Urban thermal environment is usually delineated by land surface temperature（LST）. However, the quantitative and accurate estimation of LST from Landsat data is still a challenge, especially for urban areas. This paper will discuss the main challenges for urban LST retrieval, including urban surface emissivity, atmospheric correction, radiometric calibration, and validation. In addition, we will discuss general challenges confronting the continuity of quantitative applications of Landsat observations. These challenges arise mainly from the scan line corrector failure of the Landsat 7 ETM ＋ and channel differences among sensors. Based on these investigations, the concerns are to：（1） show general users the limitation and possible uncertainty of the retrieved urban LST from the single thermal channel of Landsat sensors;（2） emphasize efforts which should be done for the quantitative applications of Landsat data; and（3） understand the potential challenges for the continuity of Landsat observation（i.e., thermal infrared） for global change monitoring, while several climate data record programs being in progress.

关键词： Remote sensing Radiometric calibration SLC-off Surface temperature Data consistency