检索结果-南通市图书馆

Harnack Inequalities for G-SDEs with Multiplicative Noise

在线全文

学校读者我要写书评

暂无评论

Communications in Mathematics and Statistics 2024年第2期12卷 279-305页

作者： fen-fen yang Department of Mathematics Shanghai UniversityShanghai 200444People’s Republic of China

The Harnack inequality for stochastic differential equation driven by G-Brownian motion with multiplicative noise is derived by means of the coupling by change of measure,which extends the corresponding results derived in Wang(*** Related Fields 109:417–424)under the linear ***,we generalize the gradient estimate under nonlinear expectation appeared in Song(*** Math.64:1093–1108).

关键词： Harnack inequality Gradient estimate Multiplicative noise G-Brownian motion SDEs

Harnack inequality and gradient estimate for G-SDEs with degenerate noise

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Mathematics 2022年第4期65卷 813-826页

作者： Xing Huang fen-fen yang Center for Applied Mathematics Tianjin UniversityTianjin300072China

In this paper,the Harnack inequality for G-SDEs with degenerate noise is derived by the method of coupling by change of the ***,for any bounded and continuous function f,the gradient estimate∣∇P_(t)f∣≤c(p,t)(Pt|f|p)^(1/p),p>1,t>0 is obtained for the associated nonlinear semigroup P¯*** an application of the Harnack inequality,we prove the existence of the weak solution to degenerate G-SDEs under some integrable ***,an example is *** of the above results extend the existing ones in the linear expectation setting.

关键词： Harnack inequality degenerate noise G-SDE gradient estimate weak solution invariant expectation

Path independence of additive functionals for stochastic differential equations under G-framework

在线全文

学校读者我要写书评

暂无评论

Frontiers of Mathematics in China 2019年第1期14卷 135-148页

作者： Panpan REN fen-fen yang Departmen t of Mat hematics Swansea University Swansea SAI 8EN UK Center for Applied Mathematics Tianjin University Tianjin 300072 China

The path independence of additive functionals for stochastic differential equations (SDEs) driven by the G-Brownian motion is characterized by the nonlinear partial differential equations. The main result generalizes ... 详细信息

关键词： Stochastic differential equation (SDE) partial differential equation (PDE) additive functional G-SDEs G-Brownian motion nonlinear PDE

Harnack inequality and gradient estimate for functional G-SDEs with degenerate noise

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Probability, Uncertainty and Quantitative Risk 2022年第2期7卷 119-132页

作者： fen-fen yang Department of Mathematics Shanghai UniversityShanghai 2004China

In this paper,the Harnack and shift Harnack inequalities for functional G-SDEs with degenerate noise are derived by the method of coupling by change of ***,the gradient estimate for the associated nonlinear semigroup ... 详细信息

关键词： Harnack inequality Gradient estimate Degenerate noise Functional G-SDEs

Micro-strain regulation strategy to stabilize perovskite lattice based on the categories and impact of strain on perovskite solar cells

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2025年第1期100卷 578-604页

作者： Caixia Li Wenwu Liu Shiji Da Lingbin Kong fen Ran State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of Technology School of Materials Science and Engineering Lanzhou University of Technology

Photovoltaic metal halide perovskite solar cells(PSCs) convert light to electricity more efficiently than crystalline silicon cells, and the cost of materials used to make them is lower than that of silicon *** efficiency is not a core issue affecting the application of perovskite solar cells in special *** present, stability is the major technical encounters that hinders its further commercial development. Microstrain in PSCs is currently a significant factor responsible for the device's instability. Strain-induced ion migration is widely believed to accelerate perovskite degradation even when external stimuli are ***, it is imperative to study strain to enhance the stability of PSCs. This paper reviews recent developments to understand strain's origin and effect mechanisms on performance of PSCs, including ion migration,failure behavior, defect formation, and its effect on photoelectric properties, stability, and ***, several well-known strain management strategies are systematically introduced based on the strain effect mechanism and strain engineering on the film, providing more clues for further preparation with increased stability. The manipulation of external physical strain applied from films to entire devices has been extensively studied. Furthermore, recommendations for future research directions and chemical approaches have been provided. It is emphasized that strain engineering plays a crucial role in improving the efficiency and longevity of PSCs. Tensile strain causes rapid degradation, while moderate compressive strain and external strain control could improve properties and stability. Efforts should focus on controlling compressive strain to mitigate residual tensile strain and introducing it in a controlled manner. Future research endeavors may focus on exploring these pathways to improve the efficiency and lifespan of PSCs.

关键词： Halide perovskite solar cells Strain origins Strain effects Strain management

Atomically precise nickel-sulfur clusters for efficient electrochemical 2,5-hydroxymethylfurfural oxidation

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2025年第1期18卷 140-148页

作者： fen Wang Lu-Yu Liu Sha-Sha Cui Ting-Ting Li Xiao-Meng yang Zhijuan Liu Yanyong Wang Henan Key Laboratory of Crystalline Molecular Functional Materials Henan International Joint Laboratory of Tumor Theranostical Cluster MaterialsGreen Catalysis Centerand College of ChemistryZhengzhou UniversityZhengzhou 450001China State Key Laboratory of Chem/Bio-sensing and Chemometrics College of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082China

Nickel sulfide exhibits excellent catalytic activity in the electrochemical 2,5-hydroxymethylfurfural oxidation reaction(HMFOR).However,due to the polydispersity of nanoparticles,it is difficult to establish a clear structure-activity relationship at the atomic *** this work,we have successfully synthesized atomically precise Ni_(6)(PET)_(12)and Ni_(4)(PET)_(8)clusters(PET:2-phenylethanethiol)for ***^(2+)and S_(2)-with atomic ratio of 1:2 was mainly existed in Ni_(6)(PET)_(12)and Ni_(4)(PET)_(8)to form Ni-S *** electrochemical test results have suggested both Ni_(6)(PET)_(12)and Ni_(4)(PET)_(8)displayed outstanding electrocatalytic ability for *** Ni_(6)(PET)_(12)exhibited better electrocatalytic ability than Ni_(4)(PET)_(8)with higher current density,lower overpotential and faster reaction *** superior electrochemical ability of Ni_(6)(PET)_(12)may be due to the enhanced adsorption towards HMF molecule with strong interaction towards hydroxyl group and furan ***,it found that the Ni^(2+)species in Ni_(6)(PET)_(12)could rapidly oxidized into Ni^(3+)species,which could spontaneously capture electron and proton from HMF for *** theoretical calculation demonstrated that the Ni_(6)(PET)_(12)process lower free energy barrier than Ni_(4)(PET)_(8)to display excellent electrocatalytic *** work is of great significance for designing efficient electrocatalysts for HMFOR.

关键词： atomically precise nickel nanoclusters 2 5-hydroxymethylfurfural electro-oxidation Ni3+species

Anlotinib-induced sick sinus syndrome:Two case reports

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2025年第6期13卷 30-34页

作者： Cheng-feng Fu Li-fen yang Lei Tian Song Deng Qi Zhang Biao Yao Department of Oncology Tongren People’s HospitalTongren 554300Guizhou ProvinceChina Department of Oncology Guizhou Provincial People’s HospitalGuiyang 550000Guizhou ProvinceChina

BACKGROUND This manuscript describes the first known cases of sick sinus syndrome(SSS)associated with the use of anlotinib in non-small cell lung cancer patients,highlighting the need for increased vigilance and cardiac *** SUMMARY Two patients with non-small cell lung cancer developed SSS after 15 months and 5 months of anlotinib treatment,respectively,presenting with syncope and *** confirmed SSS,and different treatment approaches were taken for each *** patient received a dual-chamber permanent pacemaker,while the other discontinued the medication and experienced symptom *** Anlotinib can induce SSS,suggesting that cardiac monitoring is crucial during anlotinib *** management strategies are necessary for affected individuals.

关键词： Lung cancer Anlotinib Sick sinus syndrome Cardiac pacemaker Adverse drug reaction Case report

电子束检疫辐照处理对我国红富士苹果品质的影响

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

植物检疫 2016年第5期30卷 23-29页

作者：康芬芬杨菲方焱高健会彭扬思章骅靳健乔魏亚东天津出入境检验检疫局天津300461 天津滨海辐照处理与检测有限责任公司

为探索电子束辐照在我国红富士苹果检疫处理中的应用可行性,本文研究了不同剂量的电子束辐照对我国红富士苹果色泽、硬度、失水率、可溶性固形物、酸度、还原型维生素C、蛋白质、脂肪以及氨基酸等营养品质的影响。结果表明,1 155 Gy及... 详细信息

为探索电子束辐照在我国红富士苹果检疫处理中的应用可行性,本文研究了不同剂量的电子束辐照对我国红富士苹果色泽、硬度、失水率、可溶性固形物、酸度、还原型维生素C、蛋白质、脂肪以及氨基酸等营养品质的影响。结果表明,1 155 Gy及以上剂量的电子束辐照可导致苹果硬度显著下降;随着储存时间的延长,330 Gy剂量以上辐照组苹果的还原型维生素C含量明显高于对照组;低于1 650 Gy电子束辐照18 d后对红富士苹果的色泽、失水率、可溶性固形物、酸度、蛋白质、脂肪、氨基酸等品质没有影响。因此,本研究认为低于990 Gy的电子束辐照处理红富士苹果是可行的。

关键词：电子束辐照苹果品质影响

Inequality Estimates of an Inhomogeneous Semilinear Biharmonic Equation in Entire Space

在线全文

学校读者我要写书评

暂无评论

Acta Mathematicae Applicatae Sinica 2019年第4期35卷 812-819页

作者： fen yang Department of Mathematics and Statistics Wuhan University of Science and Technology

In this paper,we consider the inequality estimates of the positive solutions for the inhomogeneous biharmonic equation■-△^2u+u^p+f(x)=0 in R^n where △^2 is the biharmonic operator,p>1,n≥5 and 0≡f∈C(R^n)is a given nonnegative *** obtain different inequality estimates of Eq.(*),with which the necessary conditions of existence on f and p are also established.

关键词： inhomogeneous biharmonic equation positive solution inequality estimates