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New understanding achieved from 2 years of Chinese ionospheric investigations

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Science Bulletin 2016年第7期61卷 524-542页

作者： Libo Liu Weixing wan Key Laboratory of Earth and Planetary Physics Institute of Geology and Geophysics Chinese Academy of Sciences Beijing National Observatory of Space Environment Institute of Geology and Geophysics Chinese Academy of Sciences Geoscience School University of the Chinese Academy of Sciences

In the mainland of China, the number of ionospheric research groups is more than 10. Around 110 articles related to ionospheric physics have been published during 2014–2015. In this annual national report of the Committee on Space Research(COSPAR), we will outline some recent progresses in ionospheric studies conducted by the Chinese mainland scientists in the past 2 years. These investigations cover(1) the ionosphere responses to geomagnetic activities;(2) ionospheric climatology and structures;(3) couplings between the ionosphere, plasmasphere and lower atmosphere, and possible seismic signatures in the ionosphere;(4) ionospheric irregularities and scintillation;(5) ionospheric models, data assimilation and simulations;(6) ionospheric dynamics and electrodynamics;(7) progresses in the observation methodology and technique; and(8) planetary ionospheres. Such investigations will strengthen our ability to monitor the ionosphere,provide a better understanding of the ionospheric states and the underlying fundamental processes, and improve the ionospheric modeling, forecasting, and related applications.

关键词： Ionosphere Ionospheric climatology Ionospheric dynamics Ionospheric coupling Planetary ionospheres Ionospheric disturbance

TIR enzymatic functions:signaling molecules and receptor mechanisms

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aBIOTECH 2023年第2期4卷 172-175页

作者： Li wan National Key Laboratory of Plant Molecular Genetics CAS Center for Excellence in Molecular Plant SciencesInstitute of Plant Physiology and EcologyChinese Academy of SciencesShanghai200032China

The evolutionarily conserved Toll/Interleukin-1 Receptor(TIR)domains across kingdoms of prokaryotes,plants,and animals play critical roles in innate *** studies have revealed the enzymatic functions of TIRs,the structural bases of TIRs as holoenzymes,and the identity of TIR-generated small signaling molecules and their receptors,which significantly advanced our understanding on TIR-mediated immune signaling *** reviewed the most up-to-date findings in TIR enzymatic functions from the perspectives of signaling molecules and receptor mechanisms.

关键词： NLR immune receptors TIR domains Signaling molecules Cell death

Thermal buckling analysis of functionally graded cylindrical shells

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Applied Mathematics and Mechanics(English Edition) 2017年第8期38卷 1059-1070页

作者： Zeqing wan Shirong LI College of Civil Science and Engineering Yangzhou UniversityYangzhou 225127Jiangsu ProvinceChina College of Hydraulic Energy and Power Engineering Yangzhou UniversityYangzhou 225127Jiangsu ProvinceChina

Thermal buckling behavior of cylindrical shell made of functionally graded material（FGM） is studied. The material constituents are composed of ceramic and *** material properties across the shell thickness are assumed to be graded according to a simple power law distribution in terms of the volume fraction rule of mixtures. Based on the Donnell shell theory, a system of dimensionless partial differential equations of buckling in terms of displacement components is derived. The method of separation of variables is used to transform the governing equations to ordinary differential equations（ODEs）. A shooting method is used to search for the numerical solutions of the differential equations under two types of boundary conditions. Effects of the power law index, the dimensionless geometrical parameters, and the temperature ratio on the critical buckling temperature are discussed in detail.

关键词： buckling functionally graded shells dimensionless cylindrical governing shooting ordinary assumed

基于多分支增强和融合注意力机制的水下图像增强算法

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陕西科技大学学报 2025年第1期43卷 193-202页

作者：姚斌韩典芝徐轩李婉陕西科技大学电子信息与人工智能学院陕西西安710021

由于水对光的折射和吸收,水下图像通常会出现严重的退化,如色偏、模糊、能见度低等.为了提高水下图像的可视性,提出了一种基于多分支增强和融合注意力机制的水下图像增强网络MBFA-GAN.首先,通过分析水下图像的色彩退化和模糊因素,设计... 详细信息

由于水对光的折射和吸收,水下图像通常会出现严重的退化,如色偏、模糊、能见度低等.为了提高水下图像的可视性,提出了一种基于多分支增强和融合注意力机制的水下图像增强网络MBFA-GAN.首先,通过分析水下图像的色彩退化和模糊因素,设计了青品色温修复模块和模糊恢复模块对水下图像进行色彩矫正和模糊恢复.然后,基于对多个分支特征的互补性考虑,采用循环合并策略将多个分支增强的特征利用自适应融合模块进行融合,逐步增强图像细节.最后,设计了融合注意力模块,用于深度挖掘图像在通道维度和像素维度的相关性矩阵,以提高增强图像的真实性.实验结果表明,与现有算法相比,提出的水下图像增强算法去模糊效果较好且颜色更真实,可以有效改善水下图像色偏和模糊的问题.

关键词：水下图像增强多分支增强融合注意力生成对抗网络

ORDER SCHEDULING WITH CONTROLLABLE PROCESSING TIMES, COMMON DUE DATE AND THE PROCESSING DEADLINE

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Journal of Systems Science and Systems Engineering 2017年第2期26卷 199-218页

作者： Qing Yue Guohua wan Antai College of Economics and Management Shanghai Jiao Tong University Shanghai 200030 China

Due date quotation and scheduling are important tools to match demand with production capacity in the MTO （make-to-order） environment. We consider an order scheduling problem faced by a manufacturing f＇trm operating in an MTO environment, where the firm needs to quote a common due date for the customers, and simultaneously control the processing times of customer orders （by allocating extra resources to process the orders） so as to complete the orders before a given deadline. The objective is to minimize the total costs of earliness, tardiness, due date assignment and extra resource consumption. We show the problem is NP-hard, even if the cost weights for controlling the order processing times are identical. We identify several polynomially solvable cases of the problem, and develop a branch and bound algorithm and three Tabu search algorithms to solve the general problem. We then conduct computational experiments to evaluate the performance of the three Tabu-search algorithms and show that they are generally effective in terms of solution quality.

关键词： Order scheduling due date assignment controllable processing times deadline

Robust location algorithm for NLOS environments

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Journal of Systems Engineering and Electronics 2008年第4期19卷 812-818页

作者： Huang Jiyan wan Qun Dept of Electronic Engineering Univ. of Electronic Science and Technology of China Chengdu 610054 P. R. China

One of the main problems facing accurate location in wireless communication systems is non-line-of- sight （NLOS） propagation. Traditional location algorithms are based on classical techniques under minimizing a least-squares objective function and it loses optimality when the NLOS error distribution deviates from Gaussian distribution. An effective location algorithm based on a robust objective function is proposed to mitigate NLOS errors. The proposed method does not require the prior knowledge of the NLOS error distribution and can give a closed-form solution. A comparison is performed in different NLOS environments between the proposed algorithm and two additional ones （LS method and Chan＇s method with an NLOS correction）. The proposed algorithm clearly outperforms the other two.

关键词： wireless location time-of-arrival non-line-of-sight robust objective function

Reliability Evaluation Metrics for Open Source Software Selection

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Journal of Measurement Science and Instrumentation 2010年第3期1卷 281-284页

作者： Jing-shu JIN Hoo-jae LEE sung-yul RHEW Dept.of Computer Science Soongsil UniversitySeoul 156-743Korea

Recently, Open Source Software （OSS） is so widely used not only by companies for development but also by common users instead of commercial software. However, the number of OSS is vast, and its quality varies from low to high. So how people can evaluate OSS and ensta-e that it is reliable for use becomes necessary. This paper proposes a set of reliability evaluation metrics considering the states of OSS selected in the early stage. Understandability, Fault tolerance ＆ Recoverability and Community Matmrity as sub-attributes of reliability are defined, and then several evaluation criteria for each of them are identified. A process of reliability evaluation in our study is proposed. For application, we select four OSS projects and evaluate them with our metrics. As a result of compadrison with other evaluation model for OSS, our research presents an easy, effective and trustworthy way for selecting a reliable OSS.

关键词： OSS reliability enduation metric reliability evaluation

Engineering thermotolerant plants: a solution to protecting crop production threatened by global warming

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Science Bulletin 2015年第15期60卷 1366-1367页

作者： Jianmin wan National Key Facility for Crop Gene Resources and Genetic Improvement Institute of Crop Science Chinese Academy of Agricultural Sciences

The effects of global warming are the environmental and social changes caused directly or indirectly by human emissions of greenhouse *** of climate change have already been evidenced by observed glacier retreat,chang... 详细信息

关键词：作物生产全球变暖开花植物耐热性威胁保护温室气体排放量非生物胁迫

Parametric study of a new HOS-CFD coupling method

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Journal of Hydrodynamics 2021年第1期33卷 43-54页

作者： Yuan Zhuang De-cheng wan Computational Marine Hydrodynamics Lab(CMHL) School of Naval ArchitectureOcean and Civil EngineeringShanghai Jiao Tong UniversityShanghai 200240China

This paper presents a developed new coupled method which combined our in-house CFD solver naoe-FOAM-SJTU and naoe-FOAM-os with a potential theory High Order Spectral method(HOS).A parametric study of nonlinear wave propagation in computational fluid dynamics(CFD)zone is *** convergence,time step convergence,time discretization scheme and length of relaxation zone are all carried *** parametric studies verify the steady of this new combined method and give better choice for wave *** dissipation in propagation of nonlinear regular wave can be lower than 3%in static mesh,and less than 2%in overset grid ***,a LNG FPSO is put into the viscous wave tank to study the suitable size of CFD *** achieve a better solution with least calculating resources and best numerical results,the length of CFD zone is *** parametric studies can give reference upon employment of the potential-viscous coupled method and validation of the coupled method.

关键词： High Order Spectral method(HOS)parametric study naoe-FOAM-SJTU solver potential-viscous coupled method