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| 1 | Using Imbalanced Triangle Synthetic Data for Machine Learning Anomaly Detection显示文摘The extreme imbalanced data problem is the core issue in anomaly detection.The amount of abnormal data is so small that we cannot get adequate information to analyze it.The mainstream methods focus on taking fully advantages of the normal data,of which the discrimination method is that the data not belonging to normal data distribution is the anomaly.From the view of data science,we concentrate on the abnormal data and generate artificial abnormal samples by machine learning method.In this kind of technologies,Synthetic Minority Over-sampling Technique and its improved algorithms are representative milestones,which generate synthetic examples randomly in selected line segments.In our work,we break the limitation of line segment and propose an Imbalanced Triangle Synthetic Data method.In theory,our method covers a wider range.In experiment with real world data,our method performs better than the SMOTE and its meliorations. | Menghua Luo Ke Wang Zhiping Cai Anfeng Liu Yangyang Li Chak Fong Cheang | 2019 | Computers, Materials & Continua2019，，1： | 4 |
| 2 | Overexpression and characterization of a thermostable β-agarase producing neoagarotetraose from a marine isolate Microbulbifer sp.AG1显示文摘An agarase gene containing 1 302 bp was cloned from Microbulbifer sp. AG1. It encoded a mature protein of 413 amino acids plus a 20-residue signal peptide. The recombinant enzyme without the signal peptide was expressed and purified from Escherichia coli BL21(DE3). When agarose was used as a substrate, the optimal temperature and pH for the enzyme were 60℃ and 7.5, respectively. The recombinant agarase showed excellent thermostability with 67% and 19% of residual activities after incubation at 50℃ and 60℃ for 1 h, respectively.Except SDS, the recombinant agarase had a relatively good resistance against the detected inhibitors, detergents and urea denaturant. Thin layer chromatography analysis and enzyme assay using p-nitrophenyl-α/β-Dgalactopyranoside revealed that the recombinant agarase was a β-agarase that degraded agarose into neoagarotetraose as the main end product. The enzymatic hydrolysis products with different degree of polymerization exhibited the antioxidant activities. | Yanbing Zhu He Gao Hebin Li Hui Ni Zedong Jiang Lijun Li Anfeng Xiao | 2019 | Acta Oceanologica Sinica2019，38，2： | 1 |
| 3 | Combustion mechanism development and CFD simulation for the prediction of soot emission during flaring显示文摘 | Anan Wang Helen H. Lou Daniel Chen Anfeng Yu Wenyi Dang Xianchang Li Christopher Martin Vijaya Damodara Ajit Patki | 2016 | Frontiers of Chemical Science and Engineering2016，10，4： | 1 |
| 4 | Numerical simulation of powder flow field on coaxial powder nozzle in laser metal direct manufacturing 显示文摘 | Zhang Anfeng Li Dichen Zhou Zhimin | 2010 | International Journal of Advanced Manufacturing Technology2010，49，912： | 1 |
| 5 | New development on additive manufacturing technology and its applications显示文摘Additive manufacturing technology has been developed in Xi'an Jiaotong University for almost 20 years. Up to now,it is still attracting the attentions of the researchers or manufacturers all over the world. Some innovative processes and frontier application research are all being conducted here to catch up with the new development of this technology. In the paper,newly developed processes,such as ultraviolet-light emitting diode (UV-LED) stereolithography,ceramic stereolithography,and direct metal forming,were described. Some results of the frontier application researches,such as indirect fabrication of ceramic casting mould,wind-tunnel-testing models,photonic crystals and metamaterials,were also briefly reviewed. | Tian Xiaoyong Li Dichen Zhang Anfeng Lu Zhongliang Lu Bingheng | 2013 | Engineering Sciences2013，11，1： | 1 |
| 6 | SDG multiple fault diagnosis by real-time inverse inference 显示文摘 | Zhang Zhaoqian Wu Chongguang Zhang Beike Xia Tao Li Anfeng | 2005 | Reliability Engineering and System Safety2005，87，： | 1 |
| 7 | Overview on Treatment and Control Technology for Water Eutrophication显示文摘Eutrophication is one of the important reasons for water pollution and is also the problem for water pollution treatment at home and abroad. This article takes an overview on various technical methods and their characteristics applicable for treatment and control of water eutrophication from the aspects of physics, chemistry, biochemistry and environmental factors regulation, and discusses the application and development trend for relevant technologies. | Anfeng LI Tao PAN Chong YANG Xiang HU Jianping LIU Chengxi WU | 2013 | Asian Agricultural Research2013，5，5： | 1 |
| 8 | Purification and biochemical characterization of manganesecontaining superoxide dismutase from deep-sea thermophile Geobacillus sp. EPT3显示文摘Thermostable SOD is a promising enzyme in biotechnological applications. In the present study, thermophile Geobacillus sp. EPT3 was isolated from a deep-sea hydrothermal field in the East Pacific. A thermostable superoxide dismutase(SOD) from this strain was purified to homogeneity by steps of fractional ammonium sulfate precipitation, DEAE-Sepharose chromatography, and Phenyl-Sepharose chromatography. SOD was purified 13.4 fold to homogeneity with a specific activity of 3 354 U/mg and 11.1% recovery. SOD from Geobacillus sp. EPT3 was of the Mn-SOD type, judged by the insensitivity of the enzyme to both KCN and H2O2. SOD was determined to be a homodimer with monomeric molecular mass of 26.0 k Da. It had high thermostability at 50°C and 60°C. At tested conditions, SOD was relatively stable in the presence of some inhibitors and denaturants, such as β-mercaptoethanol(β-ME), dithiothreitol(DTT), phenylmethylsulfonyl fluoride(PMSF), urea, and guanidine hydrochloride. Geobacillus sp. EPT3 SOD showed striking stability across a wide p H range from 5.0 to 11.0. It could withstand denaturants of extremely acidic and alkaline conditions, which makes it useful in the industrial applications. | ZHU Yanbing LI Hebin NI Hui LIU Jingwen XIAO Anfeng CAI Huinong | 2014 | Acta Oceanologica Sinica2014，33，12： | 0 |
| 9 | Substitution of His260 residue alters the thermostability of Pseudoalteromonas carrageenovora arylsulfatase显示文摘This study aimed to improve the thermostability of arylsulfatase from Pseudoalteromonas carrageenovora. A library of P. carrageenovora arylsulfatase mutants was constructed by introducing random mutagenesis using error-prone PCR. After screening, two mutants of H260L and D84A/H260L showed enhanced thermal stability than the wild-type predecessor (WT). Site-directed mutagenesis demonstrated that only amino acid residue at Position 260 plays an important role in the thermostability of P. carrageenovora arylsulfatase. Thermal inactivation analysis showed that the half-life (t1/2) values at 55°C for H260L, H260I, H260Q, H260F and H260R were 40.6, 48.4, 30.9, 29.1 and 34.5 min, respectively, while that of WT was 9.1 min. Structure modeling demonstrated that the additional hydrogen bonds and/or optimization of surface charge-charge interactions could be responsible for the increased thermostability imparted by H260L, H260I, H260Q, H260F and H260R. | Yanbing Zhu Xiaoqian Yin Han Liu Hebin Li Yanhong Chen Lijun Li Anfeng Xiao Hui Ni | 2019 | Acta Oceanologica Sinica2019，38，6： | 0 |
| 10 | Securing Display Path for Security-Sensitive Applications on Mobile Devices显示文摘While smart devices based on ARM processor bring us a lot of convenience,they also become an attractive target of cyber-attacks.The threat is exaggerated as commodity OSes usually have a large code base and suffer from various software vulnerabilities.Nowadays,adversaries prefer to steal sensitive data by leaking the content of display output by a security-sensitive application.A promising solution is to exploit the hardware visualization extensions provided by modern ARM processors to construct a secure display path between the applications and the display device.In this work,we present a scheme named SecDisplay for trusted display service,it protects sensitive data displayed from being stolen or tampered surreptitiously by a compromised OS.The TCB of SecDisplay mainly consists of a tiny hypervisor and a super light-weight rendering painter,and has only^1400 lines of code.We implemented a prototype of SecDisplay and evaluated its performance overhead.The results show that SecDisplay only incurs an average drop of 3.4%. | Jinhua Cui Yuanyuan Zhang Zhiping Cai Anfeng Liu Yangyang Li | 2018 | Computers, Materials & Continua2018，，4： | 0 |
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