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A local refinement purely meshless scheme for time fractional nonlinear Schrodinger equation in irregular geometry region

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Chinese Physics B 2021年第2期30卷 164-175页

作者： Tao jiang Rong-Rong jiang Jin-Jing Huang Jiu Ding Jin-Lian Ren School of Mathematical Sciences Yangzhou UniversityYangzhou 225002China Department of Mathematics University of Southern MississippiHattiesburgMS 39406-5045USA

A local refinement hybrid scheme(LRCSPH-FDM)is proposed to solve the two-dimensional(2D)time fractional nonlinear Schrodinger equation(TF-NLSE)in regularly or irregularly shaped domains,and extends the scheme to predict the quantum mechanical properties governed by the time fractional Gross-Pitaevskii equation(TF-GPE)with the rotating Bose-Einstein *** is the first application of the purely meshless method to the TF-NLSE to the author’s *** proposed LRCSPH-FDM(which is based on a local refinement corrected SPH method combined with FDM)is derived by using the finite difference scheme(FDM)to discretize the Caputo TF term,followed by using a corrected smoothed particle hydrodynamics(CSPH)scheme continuously without using the kernel derivative to approximate the spatial ***,the local refinement technique is adopted to reduce the numerical *** numerical simulations,the complex irregular geometry is considered to show the flexibility of the purely meshless particle method and its advantages over the grid-based *** numerical convergence rate and merits of the proposed LRCSPH-FDM are illustrated by solving several 1D/2D(where 1D stands for one-dimensional)analytical TF-NLSEs in a rectangular region(with regular or irregular particle distribution)or in a region with irregular *** proposed method is then used to predict the complex nonlinear dynamic characters of 2D TF-NLSE/TF-GPE in a complex irregular domain,and the results from the posed method are compared with those from the *** the numerical results show that the present method has a good accuracy and flexible application capacity for the TF-NLSE/GPE in regions of a complex shape.

关键词： Caputo fractional derivative nonlinear Schrodinger/Gross-Pitaevskii equation corrected smoothed particle hydrodynamics irregularly domain

Uncertainty Analysis and Optimization of Quasi-Zero Stifness Air Suspension Based on Polynomial Chaos Method

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Chinese Journal of Mechanical Engineering 2022年第4期35卷 268-286页

作者： Xing Xu Huan Liu Xinwei jiang Akolbire Vincent Atindana Automotive Engineering Research Institute Jiangsu UniversityZhenjiang 212013China

To improve the vibration isolation performance of suspensions,various new structural forms of suspensions have been ***,there is uncertainty in these new structure suspensions,so the deterministic research cannot refect the performance of the suspension under actual operating *** this paper,a quasi-zero stifness isolator is used in automotive suspensions to form a new suspension−quasi-zero stifness air suspension(QZSAS).Due to the strong nonlinearity and structural complexity of quasi-zero stifness suspensions,changes in structural parameters may cause dramatic changes in suspension performance,so it is of practical importance to study the efect of structural parameter uncertainty on the suspension *** order to solve this problem,three suspension structural parameters d_(0),L_(0) and Pc_(0) are selected as random variables,and the polynomial chaos expansion(PCE)theory is used to solve the suspension performance *** sensitivity of the performance parameters to diferent structural parameters was discussed and analyzed in the frequency ***,a multi-objective optimization of the structural parameters d_(0),L_(0) and Pc_(0) of QZSAS was performed with the mean and variance of the root-mean-square(RMS)acceleration values as the optimization *** optimization results show that there is an improvement of about 8%−1_(0)%in the mean value and about 4_(0)%−55%in the standard deviation of acceleration(RMS)*** paper verifes the feasibility of the PCE method for solving the uncertainty problem of complex nonlinear systems,which provide a reference for the future structural design and optimization of such suspension systems.

关键词： Air suspension Quasi-zero stifness Polynomial chaos Uncertainty analysis Optimization

TriCTI:an actionable cyber threat intelligence discovery system via trigger-enhanced neural network

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Cybersecurity 2022年第3期5卷 18-33页

作者： Jian Lu Junjie Yan Jun jiang Yitong He Xuren Wang Zhengwei jiang Peian Yang Ning Li Institute of Information Engineering Chinese Academy of SciencesBeijing 100093China School of Cyber Security University of Chinese Academy of SciencesBejing 100029China College of Information Engineering Capital Normal UniversityBeijing 100048China

The cybersecurity report provides unstructured actionable cyber threat intelligence(CTI)with detailed threat attack procedures and indicators of compromise(IOCs),e.g.,malware hash or URL(uniform resource locator)of command and control *** actionable CTI,integrated into intrusion detection systems,can not only prioritize the most urgent threats based on the campaign stages of attack vectors(i.e.,IOCs)but also take appropriate mitigation measures based on contextual information of the ***,the dramatic growth in the number of cybersecurity reports makes it nearly impossible for security professionals to find an efficient way to use these massive amounts of threat *** this paper,we propose a trigger-enhanced actionable CTI discovery system(TriCTI)to portray a relationship between IOCs and campaign stages and generate actionable CTI from cybersecurity reports through natural language processing(NLP)***,we introduce the“campaign trigger”for an effective explanation of the campaign stages to improve the performance of the classification *** campaign trigger phrases are the keywords in the sentence that imply the campaign *** trained final trigger vectors have similar space representations with the keywords in the unseen sentence and will help correct classification by increasing the weight of the *** also meticulously devise a data augmentation specifically for cybersecurity training sets to cope with the challenge of the scarcity of annotation data *** with state-of-the-art text classification models,such as BERT,the trigger-enhanced classification model has better performance with accuracy(86.99%)and F1 score(87.02%).We run TriCTI on more than 29k cybersecurity reports,from which we automatically and efficiently collect 113,543 actionable *** particular,we verify the actionability of discovered CTI by using large-scale field data from VirusTotal(VT).The results demonstrate that the threat

关键词： Actionable cyber threat intelligence Campaign trigger Indicators of compromise(IOCs) Natural language processing(NLP)

Soil phosphorus availability and rice phosphorus uptake in paddy fields under various agronomic practices

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Pedosphere 2021年第1期31卷 103-115页

作者： Bingshen jiang Jianlin SHEN Minghong SUN Yajun HU Wenqian jiang Juan WANG Yong LI Jinshui WU Key Laboratory of Agro-ecological Processes in Subtropical Region and Changsha Research Station for Agricultural&Environmental Monitoring Institute of Subtropical AgricultureChinese Academy of SciencesChangsha 410125China University of Chinese Academy of Sciences Beijing 100049China College of Biological and Food Engineering Huanghuai UniversityZhumadian 463000China College of Resources&Environment Hunan Agricultural UniversityChangsha 410128China

Agronomic practices affect soil phosphorus(P) availability, P uptake by plants, and subsequently the efficiency of P use. A field experiment was carried out to investigate the effects of various agronomic practices(straw incorporation, paddy water management, nitrogen(N) fertilizer dose, manure application,and biochar addition) on soil P availability(e.g., soil total P(STP), soil available P(SAP), soil microbial biomass P(SMBP), and rice P uptake as well as P use efficiency(PUE)) over four cropping seasons in a rice-rice cropping system, in subtropical central China. Compared to the non-straw treatment(control,using full dose of chemical N fertilizer), straw incorporation increased SAP and SMBP by 9.3%–18.5% and 15.5%–35.4%, respectively;substituting half the chemical N fertilizer dose with pig manure and the biochar application increased STP, SAP, and SMBP by 10.5%–48.3%, 30.2%–236.0%, and 19.8%–72.4%,respectively, mainly owing to increased soil P and organic carbon inputs;adding a half dose of N and no N input(reduced N treatments) increased STP and SAP by 2.6%–7.5% and 19.8%–33.7%, respectively, due to decreased soil P outputs. Thus, soil P availability was greatly affected by soil P input and use. The continuous flooding water regime without straw addition significantly decreased SMBP by 11.4% compared to corresponding treatments under a mid-season drainage water regime. Total P uptake by rice grains and straws at the harvest stage increased under straw incorporation and under pig manure application, but decreased under the reduced N treatments and under biochar application at a rate of 48 t ha-1, compared to the control. Rice P uptake was significantly positively correlated with rice biomass, and both were positively correlated with N fertilizer application rates, SAP, SMBP, and STP. Phosphorus use efficiency generally increased under straw incorporation but decreased under the reduced N treatments and under the manure application(with excessive P input), compa

关键词： biochar manure fertilizer nutrient management P use efficiency paddy soil straw incorporation water regime

Complete cohomology for complexes with finite Gorenstein AC-projective dimension

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Frontiers of Mathematics in China 2016年第4期11卷 901-920页

作者： jiangsheng HU Yuxian GENG Qinghua jiang School of Mathematics Sciences Nanjing Normal University Nanjing 210046 China School of Mathematics and Physics Jiangsu University of Technology Changzhou 213001China School of Mathematics and Quantitative Economics Shandong University ofFinance and Economics Jinan 250014 China

We study complete cohomology of complexes with finite Gorenstein AC-projective dimension. We show first that the class of complexes admitting a complete level resolution is exactly the class of complexes with finite Gorenstein AC-projective dimension. This lets us give some general techniques for computing complete cohomology of complexes with finite Gorenstein AC- projective dimension. As a consequence, the classical relative cohomology for modules of finite Gorenstein AC-projective dimension is extended. Finally, the relationships between projective dimension and Gorenstein AC-projective dimension for complexes are given.

关键词： Gorenstein AC-projective complete level resolution complete cohomology

Science behind nacre:matrix-directed mineralization at ambient condition

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Science China Materials 2016年第11期59卷 889-891页

作者： Qunfeng Cheng Lei jiang Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education School of Chemistry and EnvironmentBeihang University Laboratory of Bio-inspired Smart Interface Science Technical Institute of Physics and ChemistryChinese Academy of Science

Mother Nature has demonstrated the importance of structural designs at multiscale:biological structural materials frequently adopt complex hierarchical structures to optimize their mechanical performance that is far beyond their abiotic counterparts[1].One of the most studied biological materials is the nacreous part in some mollusk shells,

关键词： ambient hierarchical abiotic behind shells Mother adopt mineralization optimize directed

Taxonomic Status of Three Recently Proposed Species of the Genus Kurixalus(Anura,Rhacophoridae),with Discussion on the ZooBank Registrations for Electronical Publication

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Asian Herpetological Research 2024年第1期15卷 31-40页

作者： Zhitong LYU Maoliang LI Guanqi WANG Gang LIU Min LIU Ke jiang Dechun jiang Jiatang LI CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan ProvinceChengdu Institute of BiologyChinese Academy of SciencesChengdu 610040SichuanChina Chengdu Nature Reserve and Wildlife Protection Center Chengdu 610081SichuanChina University of Chinese Academy of Sciences Beijing 100049China

In the present study,we propose the synonymization of Kurixalus silvaenaias with Kurixalus *** conclusion is based on morphological examination and phylogenetic analysis of a series of newly collected specimens,as well as the type series of both *** publication dates of the two species were determined according to the related articles of the International Code of Zoological *** note,the ZooBank registrations for both species are ***,the publication of *** does not qualify as a published work and the correct publication date of *** should be the date on which it was physically ***,based on the results presented in this study and its original description,the proposal of *** is deemed untenable and should,therefore,be considered a junior synonym of *** further provide suggestions for the authors,editors,and publishers who are working on taxonomic publications,as well as for ZooBank to improve the registering service.

关键词： Kurixalus inexpectatus Kurixalus qionglaiensis Kurixalus silvaenaias nomenclature the Code

Hepatic cystic lesions mimicking liver abscess on imaging: A report oftwo cases

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Hepatobiliary & Pancreatic Diseases International 2024年第1期23卷 86-89页

作者： Yun-Wen jiang Yong-Hong Yu Tian-An jiang Shu-Yuan Tian Department of Ultrasound Medicine Tongde Hospital of Zhejiang ProvinceHangzhou 310012China Department of Ultrasound Medicine the First Affiliated HospitalZhejiang University School of MedicineHangzhou 310003China

Hepatic cystic lesions include congenital dysplasia,inflammatory cystic lesions,neoplastic cystic lesions and parasitic cystic *** different treatment modalities can be chosen for these lesions,differential diagnosis is particularly important[1].Clinical features or imaging findings of cystic lesions of the liver are typical;for instance,liver abscess often shows thick-walled enhancement on contrast-enhanced CT.

关键词： lesions Hepatic cystic

Enhanced seasonality of surface air temperature over China during the mid-Holocene

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Atmospheric and Oceanic Science Letters 2023年第5期16卷 55-60页

作者： Zhiping Tian Dabang jiang Institute of Atmospheric Physics Chinese Academy of SciencesBeijingChina

利用PMIP4多模式试验数据,作者量化了中全新世(距今约6000年)中国温度季节性变化.结果表明:相对于工业革命前期,所有16个模式一致模拟显示中全新世我国温度季节性(即夏季与冬季温差)增强,平均增幅9%;这与该时期轨道强迫引起的地表能量... 详细信息

利用PMIP4多模式试验数据,作者量化了中全新世(距今约6000年)中国温度季节性变化.结果表明:相对于工业革命前期,所有16个模式一致模拟显示中全新世我国温度季节性(即夏季与冬季温差)增强,平均增幅9%;这与该时期轨道强迫引起的地表能量通量的季节对比变化密切相关,其中净短波辐射起主导作用,净长波辐射作用次之,感热和潜热为负贡献;与模拟不同,重建结果存在不确定性。

关键词：中全新世温度季节性中国试验 PMIP4