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| 1 | Effects of Rare Earth elements on microstructure evolution and mechanical properties of 718H pre-hardened mold steel显示文摘718 H Pre-ha rdened mold steels with diffe rent Rare Earth(RE) contents were prepared to investigate the influence of RE on microstructure evolution and mechanical properties through a series of experiments and theoretical analysis.The results indicated that the toal oxygen(T.O) content decreased from 15 ppm to 6 ppm with 0.022 wt% RE addition,which is attributed to the active chemical properties of RE elements.For test steels,RE additions of 0.012 wt% and 0.022 wt% were significantly effective for refining inclusions by eliminating 11.5% large-sized inclusions with diameter exceeding 10 μm compared with that of ORE steel.RE addition contributed to modify irregular MnS and Al2 O3 inclusions into ellipsoidal RE-inclusions(RE2 O,RES,RE2 O2 S and REAlO3).The purification of molten steel and the modification of inclusions by RE treatment have significant effects on improvement of the fatigue crack growth tests(FCG) inhibition ability and impact energy as well as the isotropy.However,excessive addition of RE elements(0.07 wt%)seriously reduced the impact energy,ultimate tensile strength and FCG inhibition ability due to rapidly increase of the volume fraction of large-sized inclusions.In addition to the inclusions formed by RE treatment,trace solid solution RE atoms improve the stability of undercooled austenite,resulting in the transformation region of bainite and perlite of 0.07 RE steel shifting to the bottom right and prolonging the incubation period compared with that of ORE steel. | Hanghang Liu Paixian Fu Hongwei Liu Yanfei Cao Chen Sun Ningyu Du Dianzhong Li | 2020 | Journal of Materials Science & Technology2020，47，15： | 11 |
| 2 | MdATG18a overexpression improves basal thermotolerance in transgenic apple by decreasing damage to chloroplasts显示文摘High temperature is an abiotic stress factor that threatens plant growth and development.Autophagy in response to heat stress involves the selective removal of heat-induced protein complexes.Previously,we showed that a crucial autophagy protein from apple,MdATG18a,has a positive effect on drought tolerance.In the present study,we treated transgenic apple(Malus domestica)plants overexpressing MdATG18a with high temperature and found that autophagy protected them from heat stress.Overexpression of MdATG18a in apple enhanced antioxidase activity and contributed to the production of increased beneficial antioxidants under heat stress.Transgenic apple plants exhibited higher photosynthetic capacity,as shown by the rate of CO_(2) assimilation,the maximum photochemical efficiency of photosystem II(PSII),the effective quantum yield,and the electron transport rates in photosystems I and II(PSI and PSII,respectively).We also detected elevated autophagic activity and reduced damage to chloroplasts in transgenic plants compared to WT plants.In addition,the transcriptional activities of several HSP genes were increased in transgenic apple plants.In summary,we propose that autophagy plays a critical role in basal thermotolerance in apple,primarily through a combination of enhanced antioxidant activity and reduced chloroplast damage. | Liuqing Huo Xun Sun Zijian Guo Xin Jia Runmin Che Yiming Sun Yanfei Zhu Ping Wang Xiaoqing Gong Fengwang Ma | 2020 | Horticulture Research2020，7，1： | 9 |
| 3 | Over-sampling algorithm for imbalanced data classification显示文摘For imbalanced datasets, the focus of classification is to identify samples of the minority class. The performance of current data mining algorithms is not good enough for processing imbalanced datasets. The synthetic minority over-sampling technique(SMOTE) is specifically designed for learning from imbalanced datasets, generating synthetic minority class examples by interpolating between minority class examples nearby. However, the SMOTE encounters the overgeneralization problem. The densitybased spatial clustering of applications with noise(DBSCAN) is not rigorous when dealing with the samples near the borderline.We optimize the DBSCAN algorithm for this problem to make clustering more reasonable. This paper integrates the optimized DBSCAN and SMOTE, and proposes a density-based synthetic minority over-sampling technique(DSMOTE). First, the optimized DBSCAN is used to divide the samples of the minority class into three groups, including core samples, borderline samples and noise samples, and then the noise samples of minority class is removed to synthesize more effective samples. In order to make full use of the information of core samples and borderline samples,different strategies are used to over-sample core samples and borderline samples. Experiments show that DSMOTE can achieve better results compared with SMOTE and Borderline-SMOTE in terms of precision, recall and F-value. | XU Xiaolong CHEN Wen SUN Yanfei | 2019 | Journal of Systems Engineering and Electronics2019，30，6： | 5 |
| 4 | Profiling of seed fatty acid composition in 1025 Chinese soybean accessions from diverse ecoregions显示文摘The stability of soybean(Glycine max L.Merrill)oil is determined mainly by its fatty acid(FA)composition.We evaluated the FA composition of 1025 Chinese soybean accessions collected from diverse ecoregions and grown in multiple locations and years.We observed highly significant differences(P<0.001)between accessions in palmitic acid(PA),stearic acid(SA),oleic acid(OA),linoleic acid(LA),and linolenic acid(LNA)contents.Growth year affected(P<0.001)the abundance of all FAs except PA.The mean PA,SA,OA,LA,and LNA contents were 12.2%,3.8%,21.5%,54.2%,and 8.3%,respectively.The geographical origin of the accession influenced seed FA composition,indicating that accessions originating in each ecoregion tend to have distinct FA composition.We observed significant positive correlations among the three locations and between the two years,suggesting the high heritability and stability of individual accessions across contrasting environments.We also observed a relatively high negative correlation between the contents of OA and both LA and LNA(r=-0.90 and-0.59,respectively,each significant at P<0.001),providing a potential entry point for developing strains producing oil with higher OA and lower LA and LNA levels.These would be appropriate for specialized use in the food industry.Our results will be useful in breeding soybean with improved quality to meet human nutritional and industrial needs. | Ahmed M.Abdelghany Shengrui Zhang Muhammad Azam Abdulwahab S.Shaibu Yue Feng Yanfei Li Yu Tian Huilong Hong Bin Li Junming Sun | 2020 | The Crop Journal2020，8，4： | 4 |
| 5 | Decomposition of ammonium sulfate residue in a high solid/gas ratio suspension state with an industrial-scale reactor system(production line)显示文摘Ammonium sulfate residue is a particulate solid and is produced during the manufacture of ammonium sulfate fertilizer.The residue used in this study contained a large portion of calcium carbonate,from which active lime(CaO) was recovered via thermal decomposition.We used a purpose-built device to decompose the residue in a semi-suspension state.We found that CaO had the highest activity when residue was decomposed at 850-900 ℃.Our experiments indicated that ammonium sulfate residue should be decomposed in a suspension state to produce active CaO.Based on our laboratory test findings,an industrial-scale production line with a high solid/gas ratio in a suspension state was devised.The optimal operating conditions for the decomposition of the ammonium sulfate residue to produce high quality CaO were also investigated.We found that the CaCO_3 decomposition rate was high and the CaO product was highly active,averaging 170 s by the citric acid method.Morphology measurements showed that the CaO product had a porous structure and a large specific surface ensuring high activity. | Qi Li Delong Xu Yanxin Chen Yanfei Yao Zhi Sun Songxiong Ding | 2015 | Particuology2015，13，5： | 4 |
| 6 | Hydrothermal synthesis of monodisperse α-Fe_2O_3 hexagonal platelets显示文摘Uniformly sized α-Fe2O3 hexagonal platelets were synthesized by a hydrothermal process using Fe(OH)3 suspension and large amount of NaOH.The reaction products were characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM),transmission electron microscopy(TEM),selected area electron diffraction(SAED),and a vibrating sample magnetometer(VSM).The results show that the hexagonal platelets are fine,monodisperse and consisting of single-crystals.The magnetic hysteresis(M-H) curve of the samples measured at room temperature indicates that the α-Fe2O3 micro-platelets exhibit ferromagnetic behaviors with relatively low coercivity. | Dengfeng Peng Sadeh Beysen Qiang Li Yanfei Sun Linyu Yang | 2010 | Particuology2010，8，4： | 4 |
| 7 | An Analysis and Proof on Self-Similarity Property of Flash P2P Internet Video Traffic显示文摘In order to study the amount of bandwidth resource loss caused by flash P2 P technique, its influence on network load and its maintenance cost, the characteristic of Internet traffic of flash P2 P is studied. On the basis of analysis of features of Real time media flow protocol(RTMFP), the traffic of flash P2 P can be identified from the Internet traffic. By extraction and analysis of the traffic of the three largest online video content providers in China(Youku, Iqyi and Sohu Video) and the calculation of probability distribution of the traffic, it is found that the transmission time of flash P2 P traffic and the transmission time interval obeys the heavy-tailed distribution. This accounts for the self-similarity of the flash P2 P traffic. To better explain the phenomenon, the long-range dependent model is established based on the current traffic. By the established mathematical model, it is strictly proved that flash P2 P traffic has self-similar characteristic. | JI Yimu YUAN Yongge HAN Zhijie WANG Hao HAN Lei SUN Yanfei WANG Ruchuan | 2015 | Chinese Journal of Electronics2015，24，1： | 3 |
| 8 | Experimental Study on the Heating Effect of a Wind-Energy Stirring Heater显示文摘In this paper,an experiment system of wind-energy stirring heater has been designed and built.Its heating performance under the rotation speed of 300 r/min has been studied through changing stirring rotor’s layer number or using different working fluids.With the help of CFD numerical simulation method,we studied the influence factors including temperature rise,total heat,heating power of each experimental group,and analyzed why these factors have such an effect.The results show:increasing the layer number of the stirring rotors can increase the motion intensity of working fluid and improve the heating effect;the quantity of effective working fluid in the rotor area can be increased significantly with the increasing of liquid level;the working liquid with high density,low viscosity,low specific heat capacity will be the ideal one. | LIU Xingran SUN Xianpeng LI Jianming QIU Xinyang YANG Kang CAO Yanfei | 2021 | Journal of Thermal Science2021，30，3： | 2 |
| 9 | A Construction of SIP Based Peer-to-Peer Network and Performance Analysis显示文摘 | LI Jun ZHANG Shunyi WANG Haoyun SUN Yanfei | 2009 | Chinese Journal of Electronics2009，18，2： | 2 |
| 10 | Laser-driven plasma collider for nuclear studies显示文摘A novel method of initiating nuclear fusion reactions in a full plasma environment was suggested, and a proof-of-concept experiment was carried out with the D t D ! n t3 He reaction. In this new approach, two plasma jets generated by high-intensity lasers collide headon-head. The center-of-mass energy of the nuclei increases accordingly, and therefore, reaction products can be significantly enhanced, especially in the sub-Coulomb barrier ranges. As a result of the fusion reaction, up to 7:6 105 neutrons had been observed. This new type of ‘‘plasma collider'' could provide an innovative tool to study nuclear reactions under astrophysical conditions. | Changbo Fu Jie Bao Liming Chen Jianjun He Long Hou Liang Li Yanfei Li Yutong Li Guoqian Liao Yongjoo Rhee Yang Sun Shiwei Xu Dawei Yuan Xiaopeng Zhang Gang Zhao Jiarui Zhao Baojun Zhu Jianqiang Zhu Jie Zhang | 2015 | Science Bulletin2015，60，13： | 2 |
| 11 | Minimizing Energy Cost for Green Data Center by Exploring Heterogeneous Energy Resource显示文摘With the deteriorating effects resulting from global warming in many areas, geographically distributed data centers contribute greatly to carbon emissions, because the major energy supply is fossil fuels. Considering this issue, many geographically distributed data centers are attempting to use clean energy as their energy supply, such as fuel cells and renewable energy sources. However, not all workloads can be powered by a single power sources, since different workloads exhibit different characteristics. In this paper, we propose a fine-grained heterogeneous power distribution model with an objective of minimizing the total energy costs and the sum of the energy gap generated by the geographically distributed data centers powered by multiple types of energy resources. In order to achieve these two goals, we design a two-stage online algorithm to leverage the power supply of each energy source. In each time slot, we also consider a chance-constraint problem and use the Bernstein approximation to solve the problem. Finally, simulation results based on real-world traces illustrate that the proposed algorithm can achieve satisfactory performance. | Xiaoxuan Hu Peng Li Yanfei Sun | 2021 | Journal of Modern Power Systems and Clean Energy2021，9，1： | 2 |
| 12 | Experimental Investigation for Co-Combustion Characteristics of Semi-Coke and Bituminous Coal in a 3 MWth Tangential Combustion Facility显示文摘An experimental investigation was conducted in a 3 MW pilot-scale tangential combustion facility to explore the co-combustion characteristics of bituminous coal mixed with semi-coke.The thermal gravimetric analyzer(TGA)was used to obtained fuel thermal analysis.The results presented effects of semi-coke blending ratio(BR)on average furnace temperature,ignition temperature,NO emission and combustion efficiency.The excess air coefficient in main combustion sections and outlet were fixed at 0.85 and 1.2 while BR increased from 0%to 50 wt.%.The temperature profiles of combustion decreases along the height of furnace while average furnace temperature fluctuates slightly with an increasing BR.The concentration of NO has an increasing tendency with the increasing of BR.The ignition temperature obtained from TGA measurement agreed well with experiment result.In addition,combustion efficiency was not sensitive to BR and decreased slightly with the increasing BR. | GUAN Jingyu YU Qiang SUN Rui SHEN Tao WANG Minghao YAN Yanfei SONG Xin | 2020 | Journal of Thermal Science2020，29，6： | 2 |
| 13 | In-situ Reduction Synthesis of Bi/BiOI Heterostructure Films with High Photoelectrochemical Activity显示文摘The Bi/BiOI heterostructure films grew perpendicular to the FTO substrates were synthesized in-situ tlirough an electrochemical deposition and hydrogen reduction metliod. The metallic Bi nanoparticles were decorated onto the surface of BiOI nanosheets via an in-situ reduction, induced 6.3 times improvement of photocurrent density, compared to the pristine BiOI at 1.23 V vs. reversible hydrogen electrode(RHE).The enhancement of photoelectrochemical perfomiance was attributed not only to the efficient separation of charge resulted from surface plasmon resonance efleet, but also to the fast charge transfer at the interface due to the in-situ reduction of the films. This work provided a simple and facile strategy to in-situ construct heterostnicture films, and showed an effective metliod to improve the photoelectrochemical activity of Bi-based semiconductors. | LIU Yanfei CHU Yu DU Zhuoyang SUN Yan CAO Feng | 2019 | Chemical Research in Chinese Universities2019，35，4： | 1 |
| 14 | Mechanical Behavior of Light Trusses Made of Poplar Laminated Veneer Lumber and Connected with Bolts and Tooth Plates显示文摘Poplar Laminated Veneer Lumber(Poplar LVL)is a new type of engineering materials with high strength,good reliability and small variability.Poplar LVL is manufactured from the fast-growing poplar,which is widely used in packaging,furniture and others,however,is rarely adopted in construction.In order to explore the feasibility of poplar LVL trusses in construction of roof,four 4.5-m-span Fink-and-Howe trusses were designed and assembled,which were made of poplar LVL with bolted-and tooth-plated connections.Vertical static loading on the upper chord joints of a truss was imposed by self-balancing test device.The mechanical properties of trusses were examined.The ultimate load,deformation character and failure mode of each truss were measured,observed and analyzed.Furthermore,four types of analytical models with different joint connection assumptions were used to estimate the ultimate load and deflection.The results showed that the poplar LVL trusses were basically in elastic stage before the design load was reached,showing good working performance under the action of design load.The bearing capacity of the trusses of bolted connections was greater than that of the tooth-plated connections.As for the same joint connection type,the bearing capacity of Fink trusses exceeded that of Howe trusses.The poplar LVL light trusses of both types of connections showed good structural performance,which could be reasonably used for building roof systems. | Yan Liu Yanfei Guo Xufeng Sun Meng Gong | 2020 | Journal of Renewable Materials2020，8，9： | 1 |
| 15 | Protective ef- fects of Ziyang tea polysaccharides on CC|4-induced oxida- tive liver damage in mice 显示文摘 | Dongying Wang Yan Zhao Yanfei Sun | 2014 | Food Chemistry2014，，143： | 1 |
| 16 | Effects of Aluminum Exposure on Serum Sex Hormones and Androgen Receptor Expression in Male Rats显示文摘 | Hao Sun Chongwei Hu Linlin Jia Yanzhu Zhu Hansong Zhao Bing Shao Nan Wang Zhigang Zhang Yanfei Li | 2011 | Biological Trace Element Research2011，，1： | 1 |
| 17 | Controllable synthesis of titania/reduced graphite oxide nanocomposites with various titania phase compositions and their photocatalytic performance显示文摘A facile method is presented for preparing TiO2 /reduced graphite oxide(RGO) nanocomposites with phase-controlled TiO2 nanoparticles via redox reaction between the reductive titanium(Ⅲ) precursor and graphite oxide(GO),and a series of TiO2 /RGO composites with various TiO2 phase compositions were obtained.In all the titania/RGO composites,the TiO2 nanoparticles were uniformly distributed on the surface of the RGO.The TiO2 consisted of anatase phase particles in the form of square-plates with edges less than 10 nm and the rutile phase nanorods in diameters less than 10 nm.The performances of the as-prepared TiO2 /RGO composites were investigated on catalytically degrading phenol under visible light irradiation.The TiO2 /RGO composites can effectively degrade phenol under visible light irradiation,and the phase composition of TiO2 in the composites significantly influences the activities of these catalysts. | ZHAO YanFei XIE Yun SUN ZhenYu ZHANG HongYe TAO RanTing HUANG ChangLiang LIU ZhiMin | 2012 | Science China Chemistry2012，55，7： | 1 |
| 18 | Extraction of m-beta-hydroxyethylsulfonyl aniline from reactive dye wastewater 显示文摘 | HUA Iunfeng SUN Zaiqing WEI Yanfei | 2012 | Adv Mater Eng Appl2012，161，： | 1 |
| 19 | Protective effects of Keemun black tea polysaccharides on acute carbon tetrachloride-caused oxidative hepatotoxicity in mice显示文摘 | Yanfei Sun Xingbin Yang Xinshan Lu Dongying Wang Yan Zhao | 2013 | Food and Chemical Toxicology2013，，： | 1 |
| 20 | Antithrombin gene Arg197Stop mutation-associated venous sinus thrombosis in a Chinese family显示文摘This study sought to elucidate the genetic correlation of cerebral venous sinus thrombosis caused by a hereditary antithrombin deficiency in a Chinese family,at the genetic and protein levels.A nonsense mutation from C to T on locus 6431 in exon 3B of the antithrombin gene was observed,leading to an arginine (CGA) to stop codon (TGA) change in the protein.This is the first report of this mutation in China.Ineffective heparin therapy in the propositus patient is associated with a lack of heparin binding sites after antithrombin gene mutation.Characteristic low intracranial pressure in the acute phase might be specific to this patient with cerebral venous sinus thrombosis. | Ang Li Tianhui Liu Zhandong Liu Jimei Li Chunling Zhang Jun Chen Jinmei Sun Yanfei Han Lili Wang Dexin Wang Qiming Xue Baoen Wang | 2011 | Neural Regeneration Research2011，6，20： | 1 |
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