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A MOVING WATER EQUIliBRIA PRESERVING NONSTAGGERED CENTRAL SCHEME ACHIEVED VIA FLUX GLOBAliZATION FOR THE RIPA MODEL

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Acta Mathematica Scientia 2024年第6期44卷 2307-2340页

作者： Zhen li Min liU Dingfang li School of Mathematics and Statistics Wuhan UniversityWuhan 430072China

In this paper,we propose a second-order moving-water equilibria preserving nonstaggered central scheme to solve the Ripa model via flux *** maintain the moving-water steady states,we use the discrete source terms proposed by Britton et al.(J Sci Comput,2020,82(2):Art 30)by incorporating the expression of the source terms as a whole into the flux gradient,which directly avoids the discrete complexity of the source terms in order to maintain the well-balanced properties of the *** addition,since the nonstaggered central scheme requires re-projecting the updated values of the nonstaggered cells onto the staggered cells,we modify the calculation of the global variables by constructing ghost cells and alternating the values of the global variables with the water depths obtained from the solution through the nonlinear relationship between the global flux and the water *** order to maintain the second-order accuracy of the scheme on the time scale,we incorporate a new Runge-Kutta type time discretization in the evolution of the numerical solution for the nonstaggered ***,we introduce the"draining"time step technique to ensure that the water depth is positive and that it satisfies mass *** experiments verify that the scheme is well-balanced,positivity-preserving and robust.

关键词： Ripa model moving-water steady states nonstaggered central scheme flux globalization Runge-Kutta solvers

qSTA2-2,a novel QTL that contributes to seed starch synthesis in Zea mays L.

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Journal of Integrative Agriculture 2024年第4期23卷 1118-1133页

作者： Minghao Cai Xuhui li Zhi liang Jie Wang Delin li Zhipeng Yuan Riliang Gu Jianhua Wang li li State Key Laboratory of Maize Bio-breeding/Key Laboratory of Crop Heterosis Utilization Ministry of Education/Beijing Innovation Center for Crop Seed Technology/College of Agronomy and BiotechnologyChina Agricultural UniversityBeijing 100193China Institute of Nanfan&Seed Industry Guangdong Academy of ScienceGuangzhou 510316China Institute of Crop Sciences Chinese Academy of Agricultural SciencesBeijing 100081China

The seed storage materials accumulate during seed development,and are essential for seed germination and seedling *** we employed two bi-parental populations of an F2:3 population developed from a cross of improved 220(I220,small seeds with low starch)and PH4CV(large seeds with high starch),as well as recombinant-inbred lines(RILs)of X178(high starch)and its improved introgression line I178(low starch),to identify the genes that control seed storage *** identified a total of 12 QTLs for starch,protein and oil,which explained 3.44-10.79%of the phenotypic *** them,qSTA2-1 identified in F2:3 and qSTA2-2 identified in the RILs partially overlapped at an interval of 7.314-9.554 Mb,and they explained 3.44-10.21%of the starch content variation,so they were selected for further *** mapping of qSTA2-2 with the backcrossed populations of ^(I220)/PH4CV in each generation narrowed it down to a 199.7 kb interval that contains 14 open reading frames(ORFs).Transcriptomic analysis of developing seeds from the near-isogenic lines(NILs)of ^(I220)/PH4CV(BC_(5)F_(2))showed that only 11 ORFs were expressed in 20 days after pollination(DAP)*** of them were upregulated and six of them were downregulated in NIL^(I220),and the differentially expressed genes(DEGs)between NIL^(I220) and NIL^(PH4CV) were enriched in starch metabolism,hormone signal transduction and glycosaminoglycan *** the eleven NIL^(I220) differential expressed ORFs,ORF4(Zm00001d002260)and ORF5(Zm00001d002261)carry 75%protein sequence similarity,both encodes an glycolate oxidase,were the possible candidates of *** analysis and validation indicated that mutation of the qSTA2-2 locus resulted in the dysfunction of ABA accumulation,the embryo/endosperm ratio and the starch and hormone levels.

关键词： QTL mapping seed starch transcriptomic analysis hormone

Controlled Mean-Field Backward Stochastic Differential Equations with Jumps Involving the Value Function

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Journal of Systems Science & Complexity 2016年第5期29卷 1238-1268页

作者： li Juan MIN Hui School of Mathematics and Statistics Shandong University

This paper discusses mean-field backward stochastic differentiM equations （mean-field BS- DEs） with jumps and a new type of controlled mean-field BSDEs with jumps, namely mean-field BSDEs with jumps strongly coupled with the value function of the associated control problem. The authors first prove the existence and the uniqueness as well as a comparison theorem for the above two types of BSDEs. For this the authors use an approximation method. Then, with the help of the notion of stochastic backward semigroups introduced by Peng in 1997, the authors get the dynamic programming principle （DPP） for the value functions. Furthermore, the authors prove that the value function is a viscosity solution of the associated nonlocal Hamilton-Jacobi-Bellman （HJB） integro-partial differential equation, which is unique in an adequate space of continuous functions introduced by Barles, et al. in 1997.

关键词： Dynamic programming principle (DPP) Hamilton-Jacobi-Bellman (HJB) equation mean-field backward stochastic differential equation (mean-field BSDE) with jump Poisson random measure value function.

Improved Electrochemical Performance Based on Nanostructured SnS_2@CoS_2–rGO Composite Anode for Sodium-Ion Batteries

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Nano-Micro Letters 2018年第3期10卷 91-102页

作者： Xia Wang Xueying li Qiang li Hongsen li Jie Xu Hong Wang Guoxia Zhao lisha Lu Xiaoyu lin Hongliang li Shandong li College of Physics Key Laboratory of Photonics Materials and Technology in Universities of Shandong and Laboratory of Fiber Materials and Modern Textile the Growing Base for State Key Laboratory Qingdao University Institute of Materials for Energy and Environment Qingdao University

A promising anode material composed of SnS_2@CoS_2 flower-like spheres assembled from SnS_2 nanosheets and CoS_2 nanoparticles accompanied by reduced graphene oxide(rGO) was fabricated by a facile hydrothermal pathway. The presence of rGO and the combined merits of SnS_2 and CoS_2 endow the SnS_2@-CoS_2–rGO composite with high conductivity pathways and channels for electrons and with excellent properties as an anode material for sodium-ion batteries(SIBs). A high capacity of 514.0 mAh g^(-1) at a current density of200 m A g^(-1) after 100 cycles and a good rate capability can be delivered. The defined structure and good sodium-storage performance of the SnS_2@CoS_2–rGO composite demonstrate its promising application in high-performance SIBs.

关键词： SnS2 nanosheets CoS2 nanoparticles Reduced graphene oxide(rGO) Sodium-ion batteries(SIBs)

聚乙烯醇/聚吡咯复合导电水凝胶应变传感器的制备及性能

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高等学校化学学报 2021年第3期42卷 929-936页

作者：王杰李莹邵亮白阳马忠雷马建中陕西科技大学化学与化工学院陕西省轻化工助剂重点实验室中国轻工业轻化工助剂重点实验室西安710021 绵阳京东方光电科技有限公司绵阳621000 陕西科技大学轻工科学与工程学院西安710021

以聚乙烯醇(PVA)为原料,植酸(PA)和氨基-聚倍半硅氧烷(NH_(2)-POSS,NP)为交联剂,通过冻融循环法制得PVA/PA/NP复合水凝胶,再以其为模板,通过吡咯的原位聚合制得PVA/PA/NP-PPy复合导电水凝胶,克服了聚吡咯材料易脆、疏水的特性,进一步改... 详细信息

以聚乙烯醇(PVA)为原料,植酸(PA)和氨基-聚倍半硅氧烷(NH_(2)-POSS,NP)为交联剂,通过冻融循环法制得PVA/PA/NP复合水凝胶,再以其为模板,通过吡咯的原位聚合制得PVA/PA/NP-PPy复合导电水凝胶,克服了聚吡咯材料易脆、疏水的特性,进一步改善了水凝胶的导电性和灵敏性.循环拉伸实验结果表明该水凝胶具有良好的自回复能力,电导率高达7.53 S/m,从I-V曲线可知其作为柔性可穿戴应变传感器的最高检测电流可达9.029 mA,灵敏度因子可达6.796,I-T曲线表明该传感器可以准确地通过电流信号变化来监测人体的各种微小运动.

关键词：聚乙烯醇聚吡咯导电水凝胶应变传感器

Accelerate Bose–Einstein condensate by interaction

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Chinese Physics B 2019年第12期28卷 286-291页

作者： Jie-li Qin School of Physics and Electronic Engineering Guangzhou UniversityGuangzhou 510006China

In recent years,accelerating waves have attracted great research interests both due to their unique properties and tempting *** we investigate the effect of the inter-particle interaction on accelerating of Bose–Einstein condensate(BEC).We show that spatially homogeneous interactions will have no accelerating effect on BEC regardless of the interaction form(contact,dipole–dipole,or any others).But spatially inhomogeneous interactions may lead to an accelerating motion of the *** an example,the accelerating dynamic of BEC under a spatially linear modulated contact interaction is studied in *** is found that such an interaction will accelerate the condensate with a time varying ***,an interaction engineering scheme to achieve constantly accelerating BEC is proposed and studied *** results suggest that this engineering scheme can also suppress profile changing of the condensate during its evolution,thus realize an accelerating profile-keeping matter wave *** analysis also applies to optical waves with Kerr nonlinearity.

关键词： Bose–Einstein condensate interaction acceleration

Extracting Chaotic Signal from Noisy Environment: A Random Searching Method

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Chinese Journal of Electronics 2015年第3期24卷 584-589页

作者： li Guangming LYU Shanxiang School of Computer Science Dongguan University of Technology School of Electronic and Information Engineering South China University of Technology Department of Electrical and Electronic Engineering Imperial College London

The problem of Blind source extraction(BSE) regarding a chaotic signal is addressed in this paper, by employing the newly defined Proliferation exponent(PE). The properties of gradient pursuit algorithm based on PE are further articulated, especially the infelicity to tackle a BSE problem. Subsequently, we devise a constraint optimization algorithm called Orthogonal random searching(ORS) to accomplish the optimization task,which in essence searches for optimal solutions with the principle of Markov chain Monte Carlo(MCMC). Experimental results reveal that this PE-based random searching method can extract the desired chaotic signal among multiple Gaussian mixtures, as well as showing robustness against noise contamination.

关键词： Blind source extraction Chaotic signal Markov chain Monte Carlo(MCMC)

UNBOUNDED BATCH SCHEDUliNG WITH A COMMON DUE WINDOW ON A SINGLE MACHINE

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Journal of Systems Science & Complexity 2008年第2期21卷 296-303页

作者： Hongluan ZHAO Guojun li School of Computer Science and Technology Shandong Jianzhu University Jinan 250101 China School of Mathematics and System Science Shandong University Jinan 250100 China Computational Systems and Biology Laboratory Department of Biochemistry and Molecular Biology the University of Georgia Anthens 3060 USA.

The common due window scheduling problem with batching on a single machine is dealt with to minimize the total penalty of weighted earliness and tardiness. In this paper it is assumed that a job incurs no penalty as long as it is completed within the common due window. It is the first time for the due window scheduling to be extended to this situation so that jobs can be processed in batches. An unbounded version of batch scheduling is also considered. Hence, jobs, no matter how many there are, can be processed in a batch once the machine is free. For two cases that the location of due window is either a decision variable or a given parameter, polynomial algorithms are proposed based on several optimal properties.

关键词： Batch due window earliness scheduling tardiness.

Buildup characteristics of roof pollutants in the Shanghai urban area,China

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2009年第9期10卷 1374-1382页

作者： Biao WANG Tian li State Key Lab of Pollution Control and Resource Reuse Tongji University Shanghai 200092 China

The buildup of roof pollutants in an urban area of Shanghai, China was investigated by conducting 16 experiments between November 2007 and October 2008. Concentrations of Cu, Zn and Cd in runoff from three types of roof (concrete, aluminum and glass) exceeded USEPA National Recommended Water Quality Criteria. The solid/liquid partition of the selected metal elements was consistent for the three roof types: Al, Fe, Zn and Pb were present mainly in the particle-bound form, while the total loading of Cd was nearly 100% in the dissolved form. Atmospheric dry precipitation accounted for most of all pollutant loadings for all roof types, while roof material made only a minor contribution to the loadings. All pollutant accumulation rates except for COD showed a seasonal trend with peaks in spring (March^May) and winter (December^February) and troughs in summer (June^August) and autumn (September^November). Our results showed that a linear equation is the most reliable of commonly used buildup models to simulate the total phosphorus (TP) and total suspended solids (TSS) buildup processes on aluminum roofs and glass roofs. This study provided novel information about roof runoff in Shanghai, China, in terms of pollution status, pollution source and pollutant buildup processes, thereby aiding in rainwater utilization and non-point pollution control.

关键词： Roof runoff Pollutant buildup Buildup model Seasonal trend