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| 1 | Mechanical properties of hot-pressed high-entropy diboride-based ceramics显示文摘High-entropy ceramics attract more and more attention in recent years.However,mechanical properties especially strength and fracture toughness for high-entropy ceramics and their composites have not been comprehensively reported.In this work,high-entropy(Ti0.2Zr0.2Hf0.2Nb0.2Ta 0.2)B2(HEB)monolithic and its composite containing 20 vol%SiC(HEB–20SiC)are prepared by hot pressing.The addition of SiC not only accelerates the densification process but also refines the microstructure of HEB,resulting in improved mechanical properties.The obtained dense HEB and HEB–20SiC ceramics hot pressed at 1800℃exhibit four-point flexural strength of 339±17 MPa and 447±45 MPa,and fracture toughness of 3.81±0.40 MPa·m1/2 and 4.85±0.33 MPa·m1/2 measured by single-edge notched beam(SENB)technique.Crack deflection and branching by SiC particles is considered to be the main toughening mechanisms for the HEB–20SiC composite.The hardness Hv0.2 of the sintered HEB and HEB–20SiC ceramics is 23.7±0.7 GPa and 24.8±1.2 GPa,respectively.With the increase of indentation load,the hardness of the sintered ceramics decreases rapidly until the load reaches about 49 N,due to the indentation size effect.Based on the current experimental investigation it can be seen that the room temperature bending strength and fracture toughness of the high-entropy diboride ceramics are within ranges commonly observed in structure ceramics. | Ji-Xuan Liu Xiao-Qin Shen Yue Wu Fei Li Yongcheng Liang Guo-Jun Zhang | 2020 | Journal of Advanced Ceramics2020，9，4： | 16 |
| 2 | Clinical outcome of ileal pouch-anal anastomosis for chronic ulcerative colitis in China显示文摘 | Liu Gang Han Hongqiu Liu Tong Fu Qiang Lyu Yongcheng | 2014 | Chinese Medical Journal2014，，8： | 7 |
| 3 | Expression of Beclin1 in non small cell lung cancer and its clinical significance显示文摘Objective:To investigate the expression of autophagy related gene;Beclin1 in human non-small cell lung cancer(NSCLC)tissues.Methods:Protein expression of Beclin1 was determined by immunofluorescence staining and Western Blot,mRNA expression was analyzed by RT-PCR.Results:Immunofluorescence staining revealed that the level of Beclin1 expression in lung cancer was significantly lower than that in adjacent noncancerous tissues and normal tissues(expression rate 8.3%,P=0.000).The Beclin1 mRNA expression in lung cancer,adjacent noncancerous tissues and normal tissues was 1.372(±0.475)1.721(±0.521)and 1.553(±0.554)when F = 15.0,P < 0.01.Beclin1 protein expression in lung cancer,adjacent noncancerous tissues and normal tissues was 3.453(±0.852)5.423(±1.351)and 6.878(±0.997)F = 11.2,P < 0.01.Conclusion:The protein and mRNA expression of Beclin1 in lung cancer was much lower than those in and around cancer tissues and normal tissues,those differences having statistical significance.However in adjacent noncancerous tissues and normal tissues,the expression showed no difference. | Quan Liu Jianjun Wang Yongcheng Pan Lifeng Meng Xi Zhan | 2008 | Journal of Nanjing Medical University2008，22，2： | 6 |
| 4 | Energy conservation and emissions reduction strategies in foundry industry显示文摘Current energy conservation and emissions reduction strategies in iron and steel industry were reviewed. Since foundry industry is one of the major source of energy consumption and pollution emission (especially CO 2 ), issues concerning energy-saving and emission-reduction have been raised by governments and the industry. Specialists from around the world carried out multidimensional analyses and evaluation on the potentials in energy conservation and emissions reduction in iron and steel industry, and proposed various kinds of analyzing models. The primary measures mainly focus on the targeted policies formulation and also on clean and highefficient technologies development. The differences and similarities in energy conservation and emission reduction in foundry industry between China and other countries were discussed, while, the future development trend was also pointed out. | Li Yuanyuan Chen Weiping Huang Dan Luo Jie Liu Zhe Chen Yongcheng Liu Qiping Su Shifang | 2010 | China Foundry2010，7，4： | 4 |
| 5 | Role of surface defects of carbon nanotubes on catalytic performance of barium promoted ruthenium catalyst for ammonia synthesis显示文摘Carbon nanotubes(CNTs) with abundant surface defects are prepared by a liquid oxidation and thermal annealing method. The defective CNTs-D supported Ba–Ru/CNTs-D catalysts exhibit superior catalytic performance in ammonia synthesis with a TOF be increased up to 0.30 s-1, which is 2.5 times of oxidized CNTs-O supported Ba–Ru/CNTs-O catalysts and 5 times of the Ba–Ru/CNTs. The characterizations by CO chemisorption, transmission electron microscope, Raman, and X-ray photoelectron spectroscopy revealed that the uniformly well dispersed Ru NPs can be stabilized on the defective sites of CNTs-D. The great improvement of the catalytic performance and stability of the Ba–Ru/CNTs-D is contributed to the strong interaction between Ru NPs and surface defect of the CNTs. | Yongcheng Ma Guojun Lan Wenzhao Fu Ying Lai Wenfeng Han Haodong Tang Huazhang Liu Ying Li | 2020 | Journal of Energy Chemistry2020，29，2： | 2 |
| 6 | Geomagnetic anomalies recorded in L9 of the Songjiadian loess section in southeastern Chinese Loess Plateau显示文摘Detailed magnetostratigraphic and rock magnetic investigations on L8-S12 of the Songjiadian loess section in the Sanmenxia area,southernmost margin of the Chinese Loess Plateau were conducted in this study.Matuyama/Brunhes (M/B) boundary occurred at the bottom of the loess unit L8.The top and bottom boundaries of the Jaramillo polarity subchron are found in the middle of L10 and the bottom of L12,respectively.Magnetic fabric of the loess layers maintains the original depositional features and the recorded remanent magnetization analysis indicates little post-deposition disturbance experienced.In late Matuyama chron,two anomalies of geomagnetic field have been detected in L9.Our data demonstrated that these recorded anomalies were less likely a result of remagnetization,but more possibly the signature of geomagnetic excursions occurred,named SJD1 and SJD2.It is calculated that the midpoint ages of SJD1 and SJD2 are 0.917 Ma and 0.875 Ma,respectively,and the time-interval between the two events approximates 12 ka.Chronologically,SJD1 is close to the Santa Rosa (0.922 Ma) and SJD2 corresponds to the Kamikatsura (0.886 Ma) excursions.In consistence with previous studies,the geomagnetic field was weakened during these events. | WANG DaoJing WANG YongCheng HAN JingTai DUAN MuGang SHAN JiaZeng LIU TungSheng | 2010 | Chinese Science Bulletin2010，55，6： | 2 |
| 7 | Phosphated IrMo bimetallic cluster for efficient hydrogen evolution reaction显示文摘Developing low-cost,high-performance electrocatalysts for the hydrogen evolution reaction(HER)is essential for producing hydrogen from renewable energy sources.Herein,we report phosphated IrMo bimetallic clusters supported by macroporous nitrogen-doped carbon(IrMoP/MNC)as a highly efficient alkaline HER catalyst.The experimental and theoretical results demonstrate that P and Mo synergistically tune the electronic structure of atomically dispersed Ir to improve adsorption of the reactant H_(2)O and desorption of the product OH^(-).P itself serves as an active site and cooperates with the nearby Ir atom to significantly enhance the HER kinetics.Even with only 2.6 wt%Ir in the catalyst,IrMoP/MNC exhibits an ultralow overpotential of 14 mV at 10 mA cm^(-2),as well as an unprecedented high mass activity of 18.58 A mg Ir^(-1) at an overpotential of 100 mV,superior to commercial Pt/C and overwhelmingly better than other Ir-based electrocatalysts.This study demonstrates a multi-level design strategy to effectively improve the atom efficiency of a noble metal,involving spatial geometry,local electronic structure,and dual-atom synergy. | Xu Guo Xin Wan Qingtao Liu Yongcheng Li Wenwen Li Jianglan Shui | 2022 | eScience2022，2，3： | 2 |
| 8 | Effects of zinc, copper, and selenium on placental cadmium transport显示文摘 | Yali Zhang Yongcheng Zhao Jixian Wang Hongda Zhu Quingfen Liu Yaguang Fan Naifen Wang Aiping Liu Husheng Liu Li Ou-Yang Jinhui Zhao Tiqiang Fan | 2004 | Biological Trace Element Research (-)2004，，1： | 1 |
| 9 | Catalysis stability enhancement of Fe/Co dual-atom site via phosphorus coordination for proton exchange membrane fuel cell显示文摘Non-precious metal catalysts(NPMCs)are promising low-cost alternatives of Pt/C for oxygen reduction reaction(ORR),which however suffer from serious stability challenge in the devices of proton-exchange-membrane fuel cells(PEMFC).Different from the traditional strategies of increasing the degree of graphitization of carbon substrates and using less Fenton-reactive metals,we prove here that proper regulation of coordination anions is also an effective way to improve the stability of NPMC.N/P cocoordinated Fe-Co dual-atomic-sites are constructed on ZIF-8 derived carbon support using a molecular precursor of C_(34)H_(28)Cl_(2)CoFeP_(2)and a“precursor-preselected”method.A composition of FeCoN_(5)P1 is infered for the dual-atom active site by microscopy and spectroscopy analysis.By comparing with N-coordinated references,we investigate the effect of P-coodination on the ORR catalysis of Fe-Co dual-atom catalysts in PEMFC.The metals in FeCoN_(5)P1 have the lower formation energy than those in the solo N-coordinated active sites of FeCoN6 and FeN_(4),and exhibits a much better fuel cell stability.This anion approach provides a new way to improve the stability of dual-atom catalysts. | Yinuo Wang Xin Wan Jieyuan Liu Wenwen Li Yongcheng Li Xu Guo Xiaofang Liu Jiaxiang Shang Jianglan Shui | 2022 | Nano Research2022，15，4： | 1 |
| 10 | The C_(6)D_(6)detector system on the Back-n beam line of CSNS显示文摘Introduction The neutron capture cross sections are very important in the field of nuclear device design and basic physics research.Hydrogen-free liquid scintillator such as C_(6)D_(6)detectors are widely used in the neutron capture cross-sectional measurements for the low neutron sensitivity and fast time response.The Back-n white neutron source at China Spallation Neutron Source is the first spallation white neutron source in China,and it is suitable for neutron capture cross-sectional measurement.Materials and methods A C_(6)D_(6)detector system was built in the Back-n experimental station.The pulse height weighting technique was used to determine the system’s detection efficiency.The response to gamma rays of the C_(6)D_(6)detector was measured,and the energy resolution function was determined.Monte Carlo simulation with Geant4 code was carried out to get the weighting function of this C_(6)D_(6)detector system.Additionally,the systematic uncertainty of the weighting function was also determined.Conclusion According to the experimental and simulation results,this C_(6)D_(6)detector system can be used to measure neutron capture cross section. | Jie Ren Xichao Ruan Jie Bao Guangyuan Luan Wei Jiang Qi An Huaiyong Bai Ping Cao Qiping Chen Yonghao Chen Pinjing Cheng Zengqi Cui Ruirui Fan Changqing Feng Minhao Gu Fengqin Guo Changcai Han Zijie Han Guozhu He Yongcheng He Yuefeng He Hanxiong Huang Weiling Huang Xiru Huang Xiaolu Ji Xuyang Ji Haoyu Jiang Hantao Jing Ling Kang Mingtao Kang Bo Li Lun Li Qiang Li Xiao Li Yang Li Yang Li Rong Liu Shubin Liu Xingyan Liu Yinglin Ma Changjun Ning Binbin Qi Zhaohui Song Hong Sun Xiaoyang Sun Zhijia Sun Zhixin Tan Hongqing Tang Jingyu Tang Pengcheng Wang Qi Wang Taofeng Wang Yanfeng Wang Zhaohui Wang Zheng Wang Jie Wen Zhongwei Wen Qingbiao Wu Xiaoguang Wu Xuan Wu Likun Xie Yiwei Yang Han Yi Li Yu Tao Yu Yongji Yu Guohui Zhang Jing Zhang Linhao Zhang Liying Zhang Qingmin Zhang Qiwei Zhang Xianpeng Zhang Yuliang Zhang Zhiyong Zhang Yingtan Zhao Liang Zhou Zuying Zhou Danyang Zhu Kejun Zhu Peng Zhu | 2019 | Radiation Detection Technology and Methods2019，3，3： | 1 |
| 11 | Detection of escherichia coli O157H7 using immunomagnetic separation and absorbance measurement 显示文摘 | Yongcheng Liu Yanbin Li | 2002 | J Microbiol Methods2002，51，3： | 1 |
| 12 | Automatic 3D surface meshing to address today's industrial needs显示文摘 | CANANN S A LIU Yongcheng MOBLEY A V | 1997 | Finite Elements in Analysis ans Design1997，25，12： | 1 |
| 13 | Synthesis and activity of largazole analogues with linker and macrocycle modification显示文摘 | Yongcheng Ying Yanxia Liu Seong Rim Byeon | 2008 | Org Lett2008，10，18： | 1 |
| 14 | Rapid detection of Salmonella typhimurium using immunomagnetic separation and immuno-optical sensing method显示文摘 | LIU Yongcheng CHE Yihua LI Yanbin | 2001 | Sensors and Actuators B2001，72，3： | 1 |
| 15 | Processing and properties of MWNT/HDPE composites显示文摘 | Yaobang Zou Yongcheng Feng Lu Wang Xiaobo Liu | 2004 | Carbon2004，42，： | 1 |
| 16 | A deep Q-learning network based active object detection model with a novel training algorithm for service robots显示文摘This paper focuses on the problem of active object detection(AOD).AOD is important for service robots to complete tasks in the family environment,and leads robots to approach the target ob ject by taking appropriate moving actions.Most of the current AOD methods are based on reinforcement learning with low training efficiency and testing accuracy.Therefore,an AOD model based on a deep Q-learning network(DQN)with a novel training algorithm is proposed in this paper.The DQN model is designed to fit the Q-values of various actions,and includes state space,feature extraction,and a multilayer perceptron.In contrast to existing research,a novel training algorithm based on memory is designed for the proposed DQN model to improve training efficiency and testing accuracy.In addition,a method of generating the end state is presented to judge when to stop the AOD task during the training process.Sufficient comparison experiments and ablation studies are performed based on an AOD dataset,proving that the presented method has better performance than the comparable methods and that the proposed training algorithm is more effective than the raw training algorithm. | Shaopeng LIU Guohui TIAN Yongcheng CUI Xuyang SHAO | 2022 | Frontiers of Information Technology & Electronic Engineering2022，23，11： | 1 |
| 17 | An amperometric biosensor based on immobhed glucose oxidase employing pbenzoquinone as electron shuttle 显示文摘 | Qian Jianghong Liu Yongcheng Liu Haiying | 1996 | Journal of Chemical Technology and Biotechnology1996，67，2： | 1 |
| 18 | Reaction mechanism and chemoselectivity of gold(Ⅰ)-catalyzed cycloaddition of 1-(1-alkynyl) cyclopropyl ketones with nucleophiles to yield substituted furans显示文摘The mechanisms of gold(Ⅰ)-catalyzed cycloaddition of 1-(1-alkynyl) cyclopropyl ketones with nucleophiles have been investigated using density functional theory calculations at the B3LYP/6-31G(d,p) level of theory.A polarizable continuum model(PCM) has been established in order to evaluate the effects of solvents on the reactions.The results of the calculations indicate that the first step of the catalytic cycle is the cyclization of the carbonyl oxygen onto the triple bond which forms a new and stable resonance structure of an oxonium ion and a carbocation intermediate.The subsequent ring expansion step results in the formation of the final product and regeneration of the catalyst.Furthermore,the regioselectivity and effect of substituents has been discussed,including an analysis of energy,bond length,and natural bond orbital(NBO) charge distributions in the rate-determining step.Our computational results are consistent with earlier experimental observations. | YAN YunFeng FANG Ran GENG ZhiYuan WANG YongCheng LIU ShaoLi | 2012 | Science China Chemistry2012，55，7： | 1 |
| 19 | Precursor compound enabled formation of aqueous-phase CdSe magic-size clusters at room temperature显示文摘The formation pathway of aqueous-phase colloidal semiconductor magic-size clusters(MSCs)remains unrevealed.In the present work,we demonstrate,for the first time,a precursor compound(PC)-enabled formation pathway of aqueous-phase CdSe MSCs exhibiting a sharp absorption peaking at about 420 nm(MSC-420).The CdSe MSC-420 is synthesized with CdCl2 and selenourea as the respective Cd and Se sources,and with 3-mercaptopropionic acid or L-cysteine as a ligand.Absorption featureless CdSe PCs form first in the aqueous reaction batches,which transform to MSC-420 in the presence of primary amines.The coordination between primary amine and Cd^(2+)on PCs may be responsible to the PC-to-MSC transformation.Upon increasing the reactant concentrations or decreasing the CdCl_(2)-ligand feed molar ratios,the Cd precursor self-assembles into large aggregates,which may encapsulate the resulting CdSe PCs and inhibit their transformation to MSC-420.The present study sheds essential light on the syntheses and formation mechanisms of nanocrystals. | Min Zhao Qingyuan Chen Yongcheng Zhu Yuehui Liu Chunchun Zhang Gang Jiang Meng Zhang Kui Yu | 2022 | Nano Research2022，15，3： | 1 |
| 20 | Immobilization of horseradish peroxidase with a regenerated silk fibroin membrane and its application to a tetrathiafulvalene-mediating H202 sensor显示文摘 | Qian Jianghong Liu Yongcheng Liu Haiying | 1997 | Biosensors & Bioelectronics1997，12，12： | 1 |
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