检索结果-南通市图书馆

L^(p)Solution of Reflected BSDEs with One Continuous Barrier and Quasi-linear Growth Generators

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Acta Mathematicae Applicatae Sinica 2024年第4期40卷 943-953页

作者： Sheng-jun fan School of Mathematics China University of Mining and TechnologyXuzhou 221116China

This paper is devoted to solving a reflected backward stochastic differential equation(BSDE in short)with one continuous barrier and a quasi-linear growth generator g,which has a linear growth in(y,z),except the upper direction in case of y1)solutions for the reflected *** also prove that the minimal Lpsolution can be approximated by a sequence of Lpsolutions of certain reflected BSDEs with Lipschitz generators.

关键词： Reflected BSDEs Quasi-linear growth L^(p)solution Existence Comparison theorem

在线全文

学校读者我要写书评

暂无评论

基于问题导向的高中信息技术深度学习探究

林区教学 2025年第1期 111-116页

作者：范学会刘丙利聊城大学传媒技术学院山东聊城252000

《普通高中信息技术课程标准(2017年版2020年修订)》注重在问题解决过程中提升学生信息素养促进深度学习。在新课标、新教材课程改革推进过程中,信息技术学科学习停留在表面、表象、表层的现象普遍存在。为促进学生信息技术学习的质量... 详细信息

《普通高中信息技术课程标准(2017年版2020年修订)》注重在问题解决过程中提升学生信息素养促进深度学习。在新课标、新教材课程改革推进过程中,信息技术学科学习停留在表面、表象、表层的现象普遍存在。为促进学生信息技术学习的质量与深度,推动课程改革取得更为显著的成果,需要深入探索有效的教学策略和方法。在研究深度学习和问题导向教学基础上,分析问题导向教学与深度学习的内涵,明确问题导向与深度学习的逻辑关联;沿循学科、学生和知识三个基点,对基于问题导向的高中信息技术深度学习活动进行设计,明确学科深度教学、学生深度投入、知识深度理解的实践取向;构建基于问题导向的深度学习活动并辅以实践案例予以说明。

关键词：问题导向深度学习高中信息技术教学

A progressive framework for rotary motion deblurring

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Defence Technology（防务技术） 2024年第2期32卷 159-172页

作者： Jinhui Qin Yong Ma Jun Huang fan fan You Du School of Electronic Information Wuhan UniversityWuhan430072China

The rotary motion deblurring is an inevitable procedure when the imaging seeker is mounted in the rotating *** rotary motion deblurring methods suffer from ringing artifacts and noise,especially for large blur *** solve the above problems,we propose a progressive rotary motion deblurring framework consisting of a coarse deblurring stage and a refinement *** the first stage,we design an adaptive blur extents factor(BE factor)to balance noise suppression and details *** a novel deconvolution model is proposed based on BE *** the second stage,a triplescale deformable module CNN(TDM-CNN)is designed to reduce the ringing artifacts,which can exploit the 2D information of an image and adaptively adjust spatial sampling *** establish a standard evaluation benchmark,a real-world rotary motion blur dataset is proposed and released,which includes rotary blurred images and corresponding ground truth images with different blur *** results demonstrate that the proposed method outperforms the state-of-the-art models on synthetic and real-world rotary motion blur *** code and dataset are available at https://***/JinhuiQin/RotaryDeblurring.

关键词： Rotary motion deblurring Progressive framework Blur extents factor TDM-CNN

Progress in understanding hormonal regulation during the postembryonic development of Helicoverpa armigera

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Agriculture 2020年第6期19卷 1417-1428页

作者： ZHAO Xiao-fan Shandong Provincial Key Laboratory of Animal Cells and Developmental Biology School of Life SciencesShandong UniversityQingdao 266237P.R.China

Lepidoptera,with 0.16 million species,is the second largest order of *** order includes silk worms,butterflies,and many agricultural *** cotton bollworm,Helicoverpa armigera(Hubner)is one of the pests in Lepidoptera that seriously harms cotton plant and other crops in China and other *** pest develops resistance to chemical insecticides *** thuringiensis(Bt)transgenic cotton plants are developed to control *** population in the ***,duri ng the past years,the rapid evoluti on of Bt toxi n resista nee is observed in *** in tran sge nic cott on *** approaches for the development of new envir on mentally friendly insecticides to control *** have become necessary,and the molecular mechanisms underlying the development and physiological processes of this species need to be further *** progress in the study of *** development and physiology has been achieved in the last *** mini-review summarizes the main fin dings on the molecular mechanisms of horm onal regulation of the development of *** to present new target genes for developing new approaches to control the pest.

关键词： Helicoverpa armigera Lepidoptera hormonal regulation development pest control

Certain Cuntz Semigroup Properties of Certain Crossed Product C^*-algebras

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2020年第3期36卷 337-362页

作者： Qing Zhai fan Department of Mathematics Shanghai Maritime UniversityShanghai 201306P.R.C hina

We show that the following properties of the C^*-algebras in a class Ω are inherited by simple unital C-algebras in the class TAΩ:(1)(m,n)-decomposable,(2) weakly(m,n)-divisible,(3) weak Riesz *** an application,let A be an infinite dimensional simple unital C-algebra such that A has one of the above-listed *** that α:G→Aut(A) is an action of a finite group G on A which has the tracial Rokhlin *** the crossed product C^*-algebra C^*(G,A,α) also has the property under consideration.

关键词： C^*-algebras tracial approximation Cuntz semigroup

Optical and electrical properties of InGaZnON thin films

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2020年第1期29卷 475-481页

作者： Jian Ke Yao fan Ye Ping fan Shenzhen Key Laboratory of Advanced Thin Films and Applications College of Physics and EnergyShenzhen UniversityShenzhen 518060China

The substrate temperature(Ts)and N2 partial pressure(PN2)dependent optical and electrical properties of sputtered InGaZnON thin films are *** the increased Ts and PN2,the thin film becomes more crystallized and *** Hall mobility,free carrier concentration(Ne),and electrical conductivity increase with the lowered interfacial potential barrier during crystal *** photoluminescence(PL)intensity decreases with the increased *** band gap(Eg)narrows and the linear refractive index(n1)increases with the increasing concentration of N in the thin *** Stokes shift between the PL peak and absorption edge decreases with *** n1,dispersion energy,average oscillator wavelength,and oscillator length strength all increase with *** single oscillator energy decreases with *** nonlinear refractive index and third order optical susceptibility increase with *** Seebeck coefficient,electron effective mass,mean free path,scattering time,and plasma energy are all Ne dependent.

关键词： InGaZnON thin films linear and nonlinear optical properties Seebeck coefficient electron effective mass

A Belief-Dependent Utility Model

在线全文

学校读者我要写书评

暂无评论

Acta Mathematicae Applicatae Sinica 2021年第4期37卷 682-696页

作者： Yu-lian fan North China University of Technology Beijing100144China

This paper proposes a belief-dependent utility function(BDU).The BDU is based on the fact that the beliefs of acts have inconsistent impacts on *** existence and uniqueness result of the BDU function is *** is then proved that the BDU function can provide risk attitude analysis and general comparative analysis as powerful as those presented by the classical expected utility theories.

关键词： belief utility function risk aversion

低温下玄武岩纤维混凝土劈拉强度尺寸效应试验

在线全文

学校读者我要写书评

暂无评论

哈尔滨工业大学学报 2025年第1期57卷 101-109页

作者：余文轩范美妤金浏杜修力清华大学土木水利学院北京100084 城市减灾与防灾防护教育部重点实验室(北京工业大学) 北京100124

为研究极端低温作用下结构尺寸和纤维体积分数对玄武岩纤维混凝土劈拉强度的定量影响规律和作用机制,设计了4种尺寸(边长分别为70、100、150和200 mm)、4种纤维体积分数(分数范围0%~0.5%)的玄武岩纤维混凝土立方体试块在常温和低温下(... 详细信息

为研究极端低温作用下结构尺寸和纤维体积分数对玄武岩纤维混凝土劈拉强度的定量影响规律和作用机制,设计了4种尺寸(边长分别为70、100、150和200 mm)、4种纤维体积分数(分数范围0%~0.5%)的玄武岩纤维混凝土立方体试块在常温和低温下(温度范围20~-90℃)进行了静态劈拉破坏试验。试验结果表明:不同类型混凝土的劈拉强度均随温度降低而线性增大(最大增幅接近130%),呈现出显著的低温增强效应;玄武岩纤维的掺入能略微强化混凝土劈拉强度的低温增强效应。不同纤维体积分数玄武岩纤维混凝土的劈拉强度均呈现出一定的纤维增强效应,并且随体积分数增加而增强;极端低温作用下玄武岩纤维的主导破坏模式由拔出破坏转变为拉断破坏,导致纤维增强效应随温度下降而变强。劈拉强度的尺寸效应随温度下降而更明显,但玄武岩纤维的掺入能减弱尺寸效应(最大削弱程度达25.8%)。本文研究能为玄武岩纤维混凝土材料在极端低温环境下的大规模工程结构应用提供有效参考。

关键词：玄武岩纤维混凝土极端低温纤维含量劈裂拉伸尺寸效应

甘肃省农业绿色全要素生产率测算及影响因素研究

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

国土与自然资源研究 2025年第1期 59-65页

作者：秦博范国华甘肃农业大学管理学院兰州730070

提升农业绿色全要素生产率对于实现农业可持续发展具有重要的意义。运用SBM-GML指数法对甘肃省各市州2011-2020年的农业绿色全要素生产率及其区域差异进行分析,最后运用Tobit模型对甘肃省农业绿色全要素生产率影响因素进行分析,并在此... 详细信息

提升农业绿色全要素生产率对于实现农业可持续发展具有重要的意义。运用SBM-GML指数法对甘肃省各市州2011-2020年的农业绿色全要素生产率及其区域差异进行分析,最后运用Tobit模型对甘肃省农业绿色全要素生产率影响因素进行分析,并在此基础上提出相应的对策建议。研究结果显示,(1)甘肃省农业绿色全要素生产率总体呈上升趋势,上升的主要动力来源于技术进步。(2)甘肃省农业绿色全要素生产率存在一定的空间差异性,总体呈现出“西低东高”的分布特点。(3)在甘肃省农业绿色全要素生产率的影响因素中,经济发展水平、城镇化水平、财政支农水平和农业产业结构对甘肃省农业绿色全要素生产率的提升具有显著的正向影响,受灾率对甘肃省农业绿色全要素生产率的提升具有显著的负向影响,且不同区域的农业绿色全要素生产率的影响因素也各不相同。最后,在以上分析的基础上提出了相应的对策建议。

关键词：农业绿色全要素生产率影响因素 SBM-GML指数 Tobit模型