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Synthesis and Characterization of Fine Grained High Density La_2Mo_2O_9-based Oxide-ion Conductors

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Journal of Materials Science & Technology 2008年第5期24卷 761-765页

作者： jianxin wang Qin wang Xianping wang Chun LI Qianfeng FANG Key Laboratory of Materials Physics Institute of Solid State Physics Chinese Academy of Sciences Hefei 230031 China Ningbo Institute of Material Technology and Engineering Chinese Academy of Sciences Ningbo 315040 China

A cost-efFective technique, including nanocrystalline powder preparation using a modified Pechini method and a two-step low-temperature sintering route, was developed for the synthesis of high performance La2Mo2O9- based oxide-ion conductors. The optimum parameters of the compaction pressure, the first step and ＇the second step sintering temperatures for the synthesis of fine grained, high density and uniform La2Mo2O9- based oxide-ion conductors were determined by a series of sintering experiments. High density and uniform sintered La2Mo2O9 samples with average grain size from 0.8 to 5 μm and La1.96K0.04Mo2O8.96 sample with average grain size as small as 500 nm were synthesized by using this cost-efFective method. The impedance measurement results show that the as-fabricated La2Mo2O9-based ceramics possess much higher ionic conductivity than that obtained by solid state reaction method. It is found that in the range of 0.8-5μm the grain size of dense La2Mo2O9 samples prepared from the nanocrystalline powders has little influence on their conductivities.

关键词： Oxide ion conductor La2MoO9 Nanocrystalline Two-stage sintering

Review of optical fibre sensors for electrical equipment characteristic state parameters detection

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High Voltage 2019年第4期4卷 271-281页

作者： Weigen Chen jianxin wang Fu Wan Pinyi wang State Key Laboratory of Power Transmission Equipment&System Security and New Technology Chongqing UniversityChongqing 400044People's Republic of China

Optical fibre sensing technology is a powerful method for long-term reliable sensing in harsh environments,which means it is particularly suitable for the detection of electrical equipment characteristic state parameters,including characteristic gases,abnormal vibration,ultrasonic produced by partial discharge,and abnormal temperature *** paper reviews several individual optical fibre sensors for different state parameters detection,discusses the advantages,limitations and possible improvement methods,and finally presents the most promising optical fibre sensor for each state parameter.

关键词： fibre state electrical

LSTM Based Reserve Prediction for Bank Outlets

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Tsinghua Science and Technology 2019年第1期24卷 77-85页

作者： Yu Liu Shuting Dong Mingming Lu jianxin wang the School of Information Science and Engineering Central South University

Reserve allocation is a significant problem faced by commercial banking businesses every day. To satisfy the cash requirement of customers and abate the vault cash pressure, commercial banks need to appropriately allocate reserves for each bank outlet. Excessive reserve would impact the revenue of bank outlets. Low reserves cannot guarantee the successful operation of bank outlets. Considering the reserve requirement is effected by the past cash balance, we deal the reserve allocation problem as a time series prediction problem, and the Long Short Time Memory(LSTM) network is adapted to solve it. In addition, the proposed LSTM prediction model regards date property, which can affect the cash balance, as a primary factor. The experiment results show that our method outperforms some existing traditional methods.

关键词： reserve prediction time series prediction Long Short Time Memory (LSTM)network date property

Split-TCP Based Acceleration Gateway over Packet Lossy Networks

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China Communications 2015年第5期12卷 100-112页

作者： DONG Pingping wang jianxin HUANG Jiawei wang Haodong School of Information Science and Engineering Central South University Science and Technology on Information Transmission and Dissemination in Communication Networks Laboratory Department of Computer and Information Science Cleveland State University

The conservative Additive Increase Multiplicative Decrease mechanism of traditional TCP causes the link under-utilization in the Wide Area Networks(WANs) due to the WANs' intrinsic nature of high latency and high packet *** alleviate the problem,we present the design and implantation of STAG,an Acceleration Gateway with Split-TCP in the *** is built on embedded network equipment and acts as a transparent *** STAG,a new improved congestion control method named Rapid TCP is adopted,which determines whether or not to decrease the congestion window based on the packet loss *** particular,in the fast recovery phase,it chooses different window adjustment strategies based on the current size of congestion window to achieve higher *** performance validation of STAG is done on both our emulation testbed and the real wide area *** results show that STAG with Rapid TCP effectively adapts to the high loss network environment and significantly speeds up the applications without loss of fairness.

关键词： TCP acceleration gateway loss rate embedded network equipment

A Hybrid Algorithm Based on Binary Chemical Reaction Optimization and Tabu Search for Feature Selection of High-Dimensional Biomedical Data

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Tsinghua Science and Technology 2018年第6期23卷 733-743页

作者： Chaokun Yan Jingjing Ma Huimin Luo jianxin wang the School of Computer and Information Engineering Henan UniversityKaifeng 475000 China School of Information Science and Engineering Central South University Changsha 410083 China

In recent years, there have been rapid developments in various bioinformatics technologies, which have led to the accumulation of a large amount of biomedical data. The biomedical data can be analyzed to enhance assessment of at-risk patients and improve disease diagnosis, treatment, and prevention. However, these datasets usually have many features, which contain many irrelevant or redundant information. Feature selection is a solution that involves finding the optimal subset, which is known to be an NP problem because of the large search space. Considering this, a new feature selection approach based on Binary Chemical Reaction Optimization algorithm （BCRO） and k-Nearest Neighbors （KNN） classifier is presented in this paper. Tabu search is integrated with CRO framework to enhance local search capacity. KNN is adopted to evaluate the quality of selected candidate subset. The results for an experiment conducted on nine standard medical datasets demonstrate that the proposed approach outperforms other state-of-the-art methods.

关键词： feature selection biomedical data chemical reaction optimization tabu search

An Overview of Kernelization Algorithms for Graph Modification Problems

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Tsinghua Science and Technology 2014年第4期19卷 346-357页

作者： Yunlong Liu jianxin wang Jiong Guo School of Information Science and Engineering Central South University College of Mathematics and Computer Science Key Laboratory of High Performance Computing and Stochastic Information Processing (Ministry of Education of China) Hunan Normal University Universitt des Saarlandes Campus E 1.7D-66123 Saarbrcken Germany

Kernelization algorithms for graph modification problems are important ingredients in parameterized computation theory. In this paper, we survey the kernelization algorithms for four types of graph modification problems, which include vertex deletion problems, edge editing problems, edge deletion problems, and edge completion problems. For each type of problem, we outline typical examples together with recent results, analyze the main techniques, and provide some suggestions for future research in this field.

关键词： graph modification problem fixed-parameter tractable kernelization algorithm

KeyEE:Enhancing Low-Resource Generative Event Extraction with Auxiliary Keyword Sub-Prompt

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Big Data Mining and Analytics 2024年第2期7卷 547-560页

作者： Junwen Duan Xincheng Liao Ying An jianxin wang Hunan Key Laboratory of Bioinformatics School of Computer Science and EngineeringCentral South UniversityChangsha 410083China Big Data Institute Central South UniversityChangsha 410083China

Event Extraction(EE)is a key task in information extraction,which requires high-quality annotated data that are often costly to *** classification-based methods suffer from low-resource scenarios due to the lack of label semantics and fine-grained *** recent approaches have endeavored to address EE through a more data-efficient generative process,they often overlook event keywords,which are vital for *** tackle these challenges,we introduce KeyEE,a multi-prompt learning strategy that improves low-resource event extraction by Event Keywords Extraction(EKE).We suggest employing an auxiliary EKE sub-prompt and concurrently training both EE and EKE with a shared pre-trained language *** the auxiliary sub-prompt,KeyEE learns event keywords knowledge implicitly,thereby reducing the dependence on annotated ***,we investigate and analyze various EKE sub-prompt strategies to encourage further research in this *** experiments on benchmark datasets ACE2005 and ERE show that KeyEE achieves significant improvement in low-resource settings and sets new state-of-the-art results.

关键词： natural language processing Event Extraction(EE) Multi-Prompt Learning(MPL) low-resource

Archaeal diversity in the seawater of Changjiang River estuary reveals its adaptability to bottom seawaters

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Journal of Oceanology and Limnology 2022年第3期40卷 1051-1069页

作者： Yan HUANG Wu QU Yingping FAN jianxin wang Marine Microorganism Ecological&Application Lab. Zhejiang Ocean UniversityZhoushan 316022China

Archaea regulate the biogeochemical processes of ocean *** Changjiang(Yangtze)River estuary(CRE) is a complex and dynamic area strongly affected by seawaters and ocean *** this study,the planktonic archaeal communities in the surface and bottom seawaters of the CRE were *** differences in the archaeal community composition were found between the surface and bottom seawaters(P<0.001).Marine Group Ⅱ(MG-Ⅱ) was dominant in the surface layers,and Nitrosopumilales was enriched in the bottom *** Group Ⅲ(MG-Ⅲ) was more abundant in the bottom layers than in the surface ones(P<0.001).These results were completely different from previous findings in the CRE *** of dissolved oxygen(DO),temperature and salinity were the most vital environmental variations in the distribution of the archacal *** to the predicted metabolic pathways,the following functional subcategories were enriched in the hypoxic condition:replication and repair,membrane transport,glycan biosynthesis and metabolism,amino acid metabolism,metabolism of cofactors and vitamins,and xenobiotics biodegradation and metabolism(P<0.001),which indicated the strong adaptability of archaea to the harsh environment in the bottom *** findings expand the understanding on archaeal structure and functions in the surface and bottom seawaters,including the hypoxic zones in the CRE,and may contribute to further works of the archaeal community in the CRE.

关键词： archaeal communities adaptability predicted metabolism hypoxic zone Changjiang River estuary

Inhibition of Wnt signaling by Frizzled7 antibody-coated nanoshells sensitizes triple-negative breast cancer cells to the autophagy regulator chloroquine

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Nano Research 2020年第6期13卷 1693-1703页

作者： jianxin wang Megan N.Dang Emily S.Day Department of Biomedical Engineering University of DelawareNewarkDE19716USA Department of Materials Science and Engineering University of DelawareNewarkDE19716USA Helen F.Graham Cancer Center&Research Institute NewarkDE19713USA

Nano Research volume 13,pages1693–1703(2020)Cite this article 137 Accesses 6 Altmetric Metrics details Abstract Despite improvements in our understanding of the biology behind triple-negative breast cancer(TNBC),it remains a devastating disease due to lack of an effective targeted *** Wnt signaling is a promising strategy to combat TNBC because Wnt signaling drives TNBC progression,chemoresistance,and ***,Wnt inhibition can lead to upregulation of autophagy,which confers therapeutic *** provides an opportunity for combination therapy,as autophagy inhibitors applied concurrently with Wnt inhibitors could increase treatment ***,we applied the autophagy inhibitor chloroquine(CQ)to TNBC cells in combination with Frizzled7 antibody-coated nanoshells(FZD7-NS)that suppress Wnt signaling by blocking Wnt ligand/FZD7 receptor interactions,and evaluated this dual treatment in *** found that FZD7-NS can inhibit Axin2 and CyclinD1,two targets of canonical Wnt signaling,and increase the expression of LC3,an autophagy *** FZD7-NS and CQ are applied together,they reduce the expression of several stemness genes in TNBC cells,leading to inhibition of TNBC cell migration and ***,co-delivery of FZD7-NS and CQ is more effective than either therapy alone or the combination of CQ with free FZD7 *** demonstrates that the nanocarrier design is important to its therapeutic ***,these findings indicate that combined regulation of Wnt signaling and autophagy by FZD7-NS and CQ is a promising strategy to combat TNBC.

关键词： nanomedicine nanoparticles combination therapy antibody delivery cancer stem cells