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Intertidal area classification with generalized extreme value distribution and Markov random field in quad-polarimetric synthetic aperture radar imagery

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Frontiers of Information Technology & Electronic Engineering 2019年第2期20卷 253-264页

作者： ting-ting jin Xiao-qiang SHE Xiao-lan QIU Bin LEI Key Laboratory of Technology in Geo-spatial Information Processing and Application System Institute of ElectronicsChinese Academy of Sciences University of Chinese Academy of Sciences Huawei Software Technologies Co. Ltd.

Classification of intertidal area in synthetic aperture radar(SAR) images is an important yet challenging issue when considering the complicatedly and dramatically changing features of tidal fluctuation. The difficulty of intertidal area classification is compounded because a high proportion of this area is frequently flooded by water, making statistical modeling methods with spatial contextual information often ineffective. Because polarimetric entropy and anisotropy play significant roles in characterizing intertidal areas, in this paper we propose a novel unsupervised contextual classification algorithm. The key point of the method is to combine the generalized extreme value(GEV) statistical model of the polarization features and the Markov random field(MRF) for contextual smoothing. A goodness-of-fit test is added to determine the significance of the components of the statistical model. The final classification results are obtained by effectively combining the results of polarimetric entropy and anisotropy. Experimental results of the polarimetric data obtained by the Chinese Gaofen-3 SAR satellite demonstrate the feasibility and superiority of the proposed classification algorithm.

关键词： Intertidal classification Polarimetric synthetic aperture radar Finite mixture model Markov random field Generalized extreme value model

Analysis of the M~[X] /G/1 Queues with Second Multi-optional Service and Unreliable Server

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Acta Mathematicae Applicatae Sinica 2010年第3期26卷 353-368页

作者： jin-ting Wang Jiang-hua Li Department of Mathematics Beijing Jiaotong University Beijing 100044 China Commanding and Engineering Institute of Chemical Defence Beijing 102205 China

A bulk-arrival single server queueing system with second multi-optional service and unreliable server is studied in this paper. Customers arrive in batches according to a homogeneous Poisson process, all customers demand the first ＂essential＂ service, whereas only some of them demand the second ＂multi-optional＂ service. The first service time and the second service all have general distribution and they are independent. We assume that the server has a service-phase dependent, exponentially distributed life time as well as a servicephase dependent, generally distributed repair time. Using a supplementary variable method, we obtain the transient and the steady-state solutions for both queueing and reliability measures of interest.

关键词： Bulk-arrival queue first essential service second optional service reliability

Optimizing mechanical properties of HIPS fabricated with low-cost desktop 3D printers:investigating the impact of process parameters

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Advances in Manufacturing 2024年第2期12卷 379-395页

作者： jin-ting Xu Guang-Wei Zhang Man-Man Chen School of Automotive Engineering Dalian University of TechnologyDalian116024People’s Republic of China

Recently,low-cost desktop three-dimensional(3D)printers,employing the fused deposition modeling(FDM)technique,have gained widespread ***,most users cannot test the strength of printed parts,and little information is available about the mechanical properties of printed high-impact polystyrene(HIPS)parts using desktop 3D *** this study,the user-adjustable parameters of desktop 3D printers,such as crisscross raster orientation,layer thickness,and infill density,were *** experimental plans were designed using the Box-Behnken method,and tensile,3-point bending,and compression tests were carried out to determine the mechanical responses of the printed *** prediction models of the process parameters were regressed to produce the optimal combination of process *** experimental results showcase that the crisscross raster orientation has significant effects on the flexural and compression strengths,but not on the tensile *** an increase in the layer thickness,the tensile,flexural,and compression strengths first decreased and then increased,reaching their minimum values at approximately 0.16 mm layer *** addition,they all increased with an increase of infill *** was demonstrated that when the raster orientation,layer thickness,and infill density were 13.08°/–76.92°,0.09 mm,and 80%,respectively,the comprehensive mechanical properties of the printed HIPS were *** results can help end-users of desktop 3D printers understand the effects of process parameters on the mechanical properties,and offer practical suggestions for setting proper printing parameters for fabricating HIPS parts.

关键词： Desktop three-dimensional(3D)printers Fused deposition modeling(FDM) High-impact polystyrene(HIPS) Process parameters

Hematopoietic stem cell transplantation of aplastic anemia by relative with mutations and normal telomere length: A case report

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World Journal of Clinical Cases 2023年第29期11卷 7200-7206页

作者： jin Yan ting jin Li Wang School of Medicine Jianghan UniversityWuhan 430056Hubei ProvinceChina Department of Hematology The Central Hospital of WuhanWuhan 430014Hubei ProvinceChina

BACKGROUND Immunosuppressive therapy and matched sibling donor hematopoietic stem cell transplantation(MSD-HSCT)are the preferred treatments for aplastic anemia(AA).CASE SUMMARY In this report,we describe a 43-year-old male patient with severe AA who carried BRIP1(also known as FANCJ),TINF2,and TCIRG1 *** of the family pedigree revealed the same TINF2 mutation in his mother and older brother,with his older brother also carrying the BRIP1 variant and demonstrating normal telomere length and hematopoietic *** patient was successfully treated with oral cyclosporine A,eltrombopag,and acetylcysteine,achieving remission 4 years after receiving MSD-HSCT from his older *** This case provides a valuable clinical reference for individuals with suspected pathogenic gene mutations,normal telomere length,and hematopoietic function,highlighting them as potential donors for patients with AA.

关键词： Aplastic anemia Hematopoietic stem cell transplantation BRIP1 gene TINF2 gene Telomere length Case report

Different Mechanisms of ε-M and α'-M Variant Selection and the Influencing Factors of ε-M Reversion During Dynamic Tension in TRIP Steel

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Acta Metallurgica Sinica(English Letters) 2018年第5期31卷 449-455页

作者： Li-Na Wang Ping Yang ting jin Wei-Min Mao School of Materials Science and Engineering University of Science and Technology Beijing Department of Materials School of Tianjin University of Science and Technology Beijing

The variant selection of martensites（ε-M and α＇-M） and ε-M reversion in dynamic tensile high-manganese TRIP steel were investigated. α＇-M variant pairs with a zigzag morphology frequently formed, and the pairs of neighboring α＇-M variants were examined in terms of mechanical work and strain energy reduction. The occurrence of a primary α＇-M variant is determined by mechanical work, but high products of mechanical work and strain energy reduction are essential for secondary variant selection. In contrast to α＇-M variant pair selection, ε-M variant selection can be attributed to the highest mechanical work. During ε-M→α＇-M transformation, the mechanical work of ε-M reversion is higher than that of α＇-M variant, thereby implying that ε-M reversion in h110 icgrain is possible. e-M plate distribution also affects the feasibility of ε-M reversion.

关键词： TRIP-assisted steel Dynamic plastic deformation Martensitic transformation Variantselection Orientation relationship

Yield of long-lived fission product transmutation using proton-, deuteron-, and alpha particle-induced spallation

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Nuclear Science and Techniques 2021年第9期32卷 73-83页

作者： Meng-ting jin Su-Yang Xu Guan-Ming Yang Jun Su Sino-French Institute for Nuclear Energy and Technology Sun Yat-sen UniversityZhuhai 519082China

The transmutation of long-lived fission products through spallation induced by light nuclides was investi-gated for the purpose of determining the feasibility of this approach for long-lived fission products,in both economic and environmental *** cross-section data were obtained from the TALYS Evaluated Nuclear Data Library(TENDL).A thick target model was used to study the consumption of the target isotopes in the transmutation *** transmutation yield was calculated using the highest beam intensity available with the China initiative accelerator-driven *** was found that the light nuclide-induced spallation reaction can significantly reduce the radio toxicity of the investigated long-lived fission *** the transmutation target made of elemental LLFP and the proton beam with an intensity of 5 mA,the consumption of 90 Sr,93 Zr,107 Pd,or 137 Cs can reach approximately 500 g per year.

关键词： Transmutation Long-lived fission products Spallation

Discrete-time GGI/GG/1 Retrial Queues with Time-controlled Vacation Policies

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Acta Mathematicae Applicatae Sinica 2013年第4期29卷 689-704页

作者： jin-ting WANG Nan WANG Attahiru S.ALFA Department of Mathematics Beijing Jiaotong University Department of Electrical and Computer Engineering University of Manitoba

A discrete-time GI/G/1 retrial queue with Bernoulli retrials and time-controlled vacation policies is investigated in this paper. By representing the inter-arrival, service and vacation tlmes using a Markov-based approach, we are able to analyze this model as a level-dependent quasi-birth-and-death （LDQBD） process which makes the model algorithmically tractable. Several performance measures such as the stationary probability distribution and the expected number of customers in the orbit have been discussed with two different policies： deterministic time-controlled system and random time-controlled system. To give a comparison with the known vacation policy in the literature, we present the exhaustive vacation policy as a contrast between these policies under the early arrival system （EAS） and the late arrival system with delayed access （LAS-DA）. Significant difference between EAS and LAS-DA is illustrated by some numerical examples.

关键词： discrete queues retrial queues time-controlled vacations early and late arrival systems matrixanalytic method

A self-healing liquid metal anode for lithium-ion batteries

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Journal of Energy Chemistry 2022年第9期31卷 522-531,I0015页

作者： Yaqin Qi Chao Shen Qian Hou Zengying Ren ting jin Keyu Xie State Key Laboratory of Solidification Processing Center for Nano Energy MaterialsSchool of Materials Science and EngineeringNorthwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene(NPU)Xi’an 710072ShaanxiChina Research&Development Institute of Northwestern Polytechnical University in Shenzhen Northwestern Polytechnical UniversityShenzhen 518057GuangdongChina

The gallium-based liquid metal as one of the self-healing materials has gained wide attention, especially in the energy storage system. However, volume expansion with the ‘‘liquid-solid-liquid”transformation process still leads to un-controlled electrode failure, which stimulates the irreversibility of liquid metal and hinders their self-healing effect as the anode for lithium-ion batteries. Herein, the polypyrrole(PPy) with highly conductive and adhesive features is first introduced to fasten the liquid metal nanoparticles(gallium-tin alloy, EGaSn) in the integrated electrode and applied as the anode for lithium-ion batteries. A tightly PPy wrapped EGaSn nanoparticles structure is formed during the in-situ polymerization synthesis process, which effectively avoids the detachment of solid alloyed products. Based on the features of PPy, polyacrylic acid is added to facilitate strengthening the integrity of the electrode by constructing the hydrogen bond. The ‘‘dual-insurance” design endows the EGaSn to exhibit superior electrochemical kinetics and an astonishing self-healing effect. As a result, the customized anode displays superior cycling stability(499.8 mAh g^(-1) after 500 cycles at 1.0 A g^(-1))and rate capability(350 mAh g^(-1) at 2.0 A g^(-1)).This work enriches the electrode engineering technology of liquid metal nanoparticles and opens up a new way to customize the self-healing anode for lithium-ion batteries.

关键词： Liquid metal Self-healing Polypyrrole Li-ion battery Stability

Chemically stable polypyrrole-modified liquid metal nanoparticles with the promising photothermal conversion capability

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Journal of Materials Science & Technology 2022年第32期127卷 144-152页

作者： Yaqin Qi ting jin Kai Yuan jingyuan You Chao Shen Keyu Xie State Key Laboratory of Solidification Processing Center for Nano Energy MaterialsSchool of Materials Science and EngineeringNorthwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene(NPU)Xi’an 710072China Research&Development Institute of Northwestern Polytechnical University in Shenzhen Northwestern Polytechnical UniversityShenzhen 518057China

The gallium-based eutectic alloy has gained particular attention in various fields due to its natural features of metallic fluids at room ***,these alloy nanoparticles are extremely susceptible to be oxidized accompanied by de-alloying during the preparation,storage,and ***,with the assistance of the macromolecular stabilizer and dopant,sodium dodecylbenzene sulfonate(SDBS),we demonstrate a stable polypyrrole(PPy)layer acts as a protected“armor”on the surface of liquid metal(i.e.,gallium-tin,EGaSn).SDBS enables the EGa Sn to keep well dispersion and protects dispersed EGaSn from being durative oxidized before PPy ***,PPy greatly inhibits the oxidation of EGaSn owing to the strong interface interaction between the lone pair electrons around the N atoms of Py rings and the Ga3+orbit of ***,the fabricated EGaSn nanoparticles possess the features of smaller particle size,superior uniform distribution,and stronger antioxidant *** prepared EGaSn@PPy composite exhibits superior stability even after storing in an aqueous solution for up to 100 *** a proof-of-concept application,the EGaSn@PPy composite displays remarkable photothermal performance with an enhanced photothermal conversion *** work provides a novel surface engineering strategy to ameliorate liquid metal for photothermal therapy applications.

关键词： Liquid metal Polypyrrole Polymeric architecture Stability Photothermal