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| 1 | Effect of aluminum modification on catalytic properties of PtSn-based catalysts supported on SBA-15 for propane dehydrogenation显示文摘The catalytic properties of PtSn-based catalysts supported on siliceous SBA-15 and Al-modified SBA-15, such as Al-incorporated SBA-15 (AlSBA-15) and alumina-modified SBA-15 (Al2O3/SBA-15), for propane dehydrogenation were investigated. Al2O3/SBA-15 was prepared either by an impregnation method using aluminum nitrate aqueous solution, or by the treatment of SBA-15 with a Al(OC3H7)3 solution in anhydrous toluene. N2-physisorption, FT-IR spectroscopy, solid-state 27Al MAS NMR spectroscopy, hydrogen chemisorption, XRF, NH3 temperature-programmed desorption, X-ray photoelectron spectroscopy and TPO were used to characterize these samples. Among these catalysts, the PtSn-based catalyst supported on Al2O3/SBA-15, which was grafted with Al(OC3H7)3, exhibited the best catalytic performance in terms of activity and stability The possible reason was due to the high Pt metal dispersion and/or the strong interactions among Pt, Sn, and the support. | Yongzheng Duan Yuming Zhou Yiwei Zhang Xiaoli Sheng Shijian Zhou Zewu Zhang | 2012 | Journal of Natural Gas Chemistry2012，21，2： | 6 |
| 2 | A smart assistance system for cable assembly by combining wearable augmented reality with portable visual inspection显示文摘Background Assembly guided by paper documents is the most widespread type used in the process of aircraft cable assembly.This process is very complicated and requires assembly workers with high-level skills.The technologies of wearable Augmented Reality(AR)and portable visual inspection can be exploited to improve the efficiency and the quality of cable assembly.Methods In this study,we propose a smart assistance system for cable assembly that combines wearable AR with portable visual inspection.Specifically,a portable visual device based on binocular vision and deep learning is developed to realize fast detection and recognition of cable brackets that are installed on aircraft airframes.A Convolutional Neural Network(CNN)is then developed to read the texts on cables after images are acquired from the camera of the wearable AR device.An authoring tool that was developed to create and manage the assembly process is proposed to realize visual guidance of the cable assembly process based on a wearable AR device.The system is applied to cable assembly on an aircraft bulkhead prototype.Results The results show that this system can recognize the number,types,and locations of brackets,and can correctly read the text of aircraft cables.The authoring tool can assist users who lack professional programming experience in establishing a process plan,i.e.,assembly outline based on AR for cable assembly.Conclusions The system can provide quick assembly guidance for aircraft cable with texts,images,and a 3 D model.It is beneficial for reducing the dependency on paper documents,labor intensity,and the error rate. | Lianyu ZHENG Xinyu LIU Zewu AN Shufei LI Renjie ZHANG | 2020 | Virtual Reality & Intelligent Hardware2020，2，1： | 5 |
| 3 | Microstructure and Mechanical Properties of Wire + Arc Additively Manufactured 2050 Al–Li Alloy Wall Deposits显示文摘Aluminum–Lithium(Al–Li) alloy is a topic of great interest owing to its high strength and light weight, but there are only a few applications of Al–Li alloy in wire ss, a special AA2050 Al–Li alloy + arc additive manufacturing(WAAM) process. To identify its feasibility in WAAM procewire was produced and employed in the production of straight-walled components, using a WAAM system based on variable polarity gas tungsten arc welding(VP-GTAW) process. The influence of post-deposited heat treatment on the microstructure and property of the deposit was investigated using optical micrographs(OM), scanning electron microscopy(SEM), X-ray diffraction(XRD), hardness and tensile properties tests. Results revealed that the microstructures of AA2050 aluminum deposits varied with their location layers. The upper layers consisted of fine equiaxed grains, while the bottom layer exhibited a coarse columnar structure. Mechanical properties witnessed a significant improvement after post-deposited heat treatment, with the average micro-hardness reaching 141 HV and the ultimate tensile strength exceeding 400 MPa. Fracture morphology exhibited a typical ductile fracture. | Hao Zhong Bojin Qi Baoqiang Cong Zewu Qi Hongye Sun | 2019 | Chinese Journal of Mechanical Engineering2019，32，6： | 4 |
| 4 | Hypoxia induces T-cell apoptosis by inhibiting chemokine C receptor 7 expression:the role of adenosine receptor A2显示文摘Hypoxia is a major characteristic of the tumor microenvironment,and its effects on immune cells are proposed to be important factors for the process of tumor immune escape.It has been reported that hypoxia affects the function of dendritic cells and the antitumor function of T cells.Here we discuss the effects of hypoxia on T-cell survival.Our results showed that hypoxia induced apoptosis of T cells.Adenosine and adenosine receptors(AR)are important to the hypoxia-related signaling pathway.Using AR agonists and antagonists,we demonstrated that hypoxia-induced apoptosis of T cells was mediated by A^(2a)and A^(2b)receptors.Furthermore,we are the first,to our knowledge,to report that hypoxia significantly inhibited the expression of chemokine C receptor 7(CCR7)of T cells via the A^(2)R signal pathway,perhaps representing a mechanism of hypoxia-induced apoptosis of T cells.Collectively,our research demonstrated that hypoxia induces T-cell apoptosis by the A^(2)R signaling pathway partly by suppressing CCR7.Blocking the A^(2)R signaling pathway and/or activation of CCR7 can increase the anti-apoptosis function of T cells and may become a new strategy to improve antitumor potential. | Jintang Sun Yan Zhang Meixiang Yang Yun Zhang Qi Xie Zewu Li Zhaogang Dong Yongmei Yang Biping Deng Alei Feng Weixu Hu Haiting Mao Xun Qu | 2010 | Cellular & Molecular Immunology2010，7，1： | 3 |
| 5 | Synthesis of MgO-Al_2O_3/ZSM-5 by Solid State Reaction for Propane Dehydrogenation显示文摘Solid-state grinding is a simple and effective method to introduce guest species into the channels of microporous materials through filling.The structure and the surface acidity of the materials were obtained from BET isotherms and NH3-TPD,respectively.XRD,UV-vis,UV diffuse-reflectance,and TEM were used to characterize the phases,and the morphology,respectively.The clustered layers of MgO-Al2O3phases were formed in the internal pore surface and were highly dispersed inside the channels of the ZSM-5 host.So the volume of MgO-Al2O3/ZSM-5 composite was larger than the ZSM-5 zeolite itself and some mesoporous channels appeared when Mg/Al species entered the channels.Meanwhile,new acid sites emerged in MgO-Al2O3/ZSM-5 composite and the acid amount of the sample changed.The improved Pt dispersion and the increased acid content would cause the increase of propane conversion and the modification of selectivity during the reaction. | Zhou Shijian ZhouYuming Sheng Xiaoli ZhangYiwei Zhang Zewu Shi Junjun Kong Jie | 2013 | China Petroleum Processing & Petrochemical Technology2013，15，3： | 2 |
| 6 | Contribution of Temperature Increase to Restrain the Transmission of COVID-19显示文摘The COVID-19 outbreak has already become a global pandemic and containing this rapid worldwide transmission is of great challenge.The impacts of temperature and humidity on the COVID-19 transmission rate are still under discussion.Here,we elucidated these relationships by utilizing two unique scenarios,repeated measurement and natural experiment,using the COVID-19 cases reported from January 23–February 21,2020,in China.The modeling results revealed that higher temperature was most strongly associated with decreased COVID-19 transmission at a lag time of 8 days.Relative humidity(RH)appeared to have only a slight effect.These findings were verified by assessing SARSCoV-2 infectivity under the relevant conditions of temperature(4C–37C)and RH(>40%).We concluded that temperature increase made an important,but not determined,contribution to restrain the COVID19 outbreak in China.It suggests that the emphasis of other effective controlling polices should be strictly implemented to restrain COVID19 transmission in cold seasons. | Mengyuan Ren Rongjuan Pei Bahabaike Jiangtulu Junxi Chen Tao Xue Guofeng Shen Xiaoru Yuan Kexin Li Changxin Lan Zhen Chen Xinwen Chen Yun Wang Xiaoqian Jia Zewu Li Audil Rashid Tippawan Prapamontol Xiuge Zhao Zhaomin Dong Yali Zhang Le Zhang Rongwei Ye Zhiwen Li Wuxiang Guan Bin Wang | 2021 | The Innovation2021，2，1： | 2 |
| 7 | Effect of zinc addition on catalytic properties of PtSnK/γ-Al 2 O 3 catalyst for isobutane dehydrogenation显示文摘 | Yiwei Zhang Yuming Zhou Junjun Shi Xiaoli Sheng Yongzheng Duan Shijian Zhou Zewu Zhang | 2012 | Fuel Processing Technology2012，，： | 1 |
| 8 | Multi-com-ponent material spherical container thermal coupling stressanalysis and component design 显示文摘 | Zhang Qian Wang Zewu Hu Dapeng | 2012 | Pressure Vessel2012，，3： | 1 |
| 9 | Application of a long short-term memory for deconvoluting conductance contributions at charged ferroelectric domain walls显示文摘Ferroelectric domain walls are promising quasi-2D structures that can be leveraged for miniaturization of electronics components and new mechanisms to control electronic signals at the nanoscale.Despite the significant progress in experiment and theory,however,most investigations on ferroelectric domain walls are still on a fundamental level,and reliable characterization of emergent transport phenomena remains a challenging task. | Theodor S.Holstad Trygve M.Ræder Donald M.Evans Didirk R.Småbråten Stephan Krohns Jakob Schaab Zewu Yan Edith Bourret Antonius T.Jvan Helvoort Tor Grande Sverre M.Selbach Joshua C.Agar Dennis Meier | 2020 | npj Computational Materials2020，，1： | 1 |
| 10 | Fuzzy intelligent control method for improving flight attitude stability of plant protection quadrotor UAV显示文摘At present,the attitude control method of plant protection UAV is the classical PID control,but there are some imperfections in the PID control,such as the contradiction between speediness and overshoot,the weak anti-jamming ability and adaptability.The physical parameters of plant protection UAV are time-varying,and the airflow also interferes with it.The control ability of classical PID is limited,and its control parameters are fixed,and its anti-jamming ability and adaptability are not strong.Therefore,a fuzzy adaptive PID controller is proposed in this paper.Fuzzy logic control is used to optimize the control parameters of PID in order to improve the dynamic and static performance and adaptability of attitude control of plant protection UAV.In the process of research,the mathematical model of UAV is established firstly,then the fuzzy adaptive PID is designed,and then the simulation is carried out in Simulink.The simulation results show that the fuzzy adaptive PID controller has better dynamic and static control performance and adaptability than the traditional PID controller.Therefore,the proposed control method has excellent application value in the attitude of plant protection UAV. | Zhihui He Wanlin Gao Xiongkui He Minjuan Wang Yunling Liu Yue Song Zewu An | 2019 | International Journal of Agricultural and Biological Engineering2019，12，6： | 1 |
| 11 | Effect of Impregnation Sequence on Propane Dehydrogenation Performance of PtSnNa/ZSM-5 Catalyst显示文摘The effects of the sequence for impregnation of metal precursors on the performance of PtSnNa/ZSM-5 catalyst for propane dehydrogenation to propene were studied in this paper.Some methods such as XRD,TPDA,BET,H2-TPR,XPS,ICP,TEM and hydrogen chemisorption were used to characterize the catalysts.The structure of ZSM-5 zeolite was not destroyed by the introduction of metal components.Meanwhile the different impregnation sequence of metal precursors could affect the behavior of Sn4+species entering the ZSM-5 channel,and the interaction between platinum and tin species,as well as the degree for reduction of Pt and Sn components.As a result,the prepared catalysts exhibited different reaction activity and selectivity.Compared with the co-impregnation treated catalyst,the catalysts prepared by the sequential impregnation method showed better catalytic activity in propane dehydrogenation,especially the one prepared through impregnation with tin precursor at first.Finally,a model for the effect of impregnation sequence on the distribution of Pt and Sn species in PtSnNa/ZSM-5 catalyst was proposed. | Liu Hui Zhou Yuming Zhang Yiwei Sheng Xiaoli Zhang Zewu Zhou Shijiang | 2013 | China Petroleum Processing & Petrochemical Technology2013，15，4： | 1 |
| 12 | Scintillation properties of improved 5% Eu2+-doped BaCI2 single crystal for X-ray and g- ray detection 显示文摘 | Zewu Y Gregory B Edith B | 2013 | Nuclear Instruments and Methods in Physics Research A2013，698，1： | 1 |
| 13 | 大肠癌患者外周血CK19和MUC-1mRNA水平及其临床意义(英文)显示文摘Objective: Using nested reverse transcription-polymerase chain reaction(Nested RT-PCR) to test the mRNA level in peripheral blood CK19 and MUC-1 in colorectal cancer patients and it's clinical significance, to discuss the feasibility of colorectal carcinoma micro-metastasis detection of molecular markers. Methods: The expression level was detected by nested RT-PCR in 20 healthy people, 20 patients with colorectal adenoma and 90 cases of patients with colorectal cancer disease peripheral blood CK19 mRNA and MUC-1 mRNA. Results: The positive expression rate of CK19 mRNA and MUC-1 mRNA were: 58.89%(53/90) and 52.22%(47/90). No CK19 mRNA healthy people 20 cases in the control group in the peripheral blood, the expression of MUC-1 mRNA in 12 cases, the expression rate of 60%(12/20). In 20 cases of colorectal adenoma diseases have the expression of CK19 mRNA in 1 cases, the expression rate of 5%(1/20), the expression of MUC-1 mRNA in 10 cases, the expression rate of 50%. Patients with colorectal cancer CK19 mRNA, MUC-1 mRNA expression rate was significantly correlated with tumor staging, the degree of differentiation of the tumor cells and tumor metastasis(P < 0.05). Conclusion: Marker CK19 mRNA as the detection of micro-metastasis in peripheral blood of patients with colorectal cancer has good sensitivity and specificity, but CK19 mRNA, MUC-1 mRNA can be used to judge the prognosis of patients with colorectal cancer index. | Qian Wang Jie Liu Zewu An | 2014 | The Chinese-German Journal of Clinical Oncology2014，13，7： | 0 |
| 14 | Clinical Effects of the COVID-19 Pandemic Among the Uninfected Pregnant Women—6 PLADs,China,2019−2020显示文摘Summary What is already known about this topic?The coronavirus disease 2019(COVID-19)pandemic potentially affected prenatal care quality and maternal and fetal outcomes globally.What is added by this report?During COVID-19 pandemic period,the rates of caesarean sections(CS)and preterm birth for uninfected pregnant women increased slightly in areas that were relatively severely impacted by the pandemic in China. | Bin Wang Hang An Huanqing Hu Wei Zhao Bahabaike Jiangtulu Shuo Wang Jiamei Wang Junxi Chen Manman Long Zewu Li Yu Jin Yuhuan Li Huiting Chen Tao Xue Xiqing Li Kexin Li Wei Du Suhong Gao Jiangli Di Xiaohong Liu Rongwei Ye Zhiwen Li | 2021 | China CDC weekly2021，3，10： | 0 |
| 15 | Alkylation of o-Xylene with Styrene over Modified Mordenite for Environmentally Friendly Synthesis of PXE显示文摘Effects of hydrochloride acid dealumination of mordenite(MOR) catalysts for the synthesis of 1-phenyl-1-xylyl ethane(PXE) were investigated. The structure and acidity of catalysts were characterized by XRD, BET, XRF, FT-IR, 27Al NMR and NH3-TPD techniques. The catalytic performance of the acid-treated MOR zeolites was studied through using the alkylation of o-xylene with styrene. The test results showed that the strength of remaining Br?nsted acid sites increased despite the reduction of total number of acid sites after dealumination, and the micropores of HMOR were slightly enlarged coupled with the formation of secondary mesopores. Additionally, the modified HMOR zeolites showed longer catalyst life with the styrene conversion rate retained. Among the catalysts employed in this study, the modified mordenite that was dealuminated by HCl(2 mol/L) could be used repeatedly without significant loss of activity and selectivity during six catalytic runs, which have been ascribed to its specific acidity and structural properties. | Kong Jie Sheng Xiaoli Zhou Yuming Zhou Shijian Zhang Zewu | 2014 | China Petroleum Processing & Petrochemical Technology2014，16，1： | 0 |
| 16 | Numerical Simulation of Deforming Manufacture Process for Automobile Bevel Gear Blank显示文摘Aiming at solving the difficulties of deforming manufacture of the automobile rear axle bevel gear blank,the paper presented to adopt the numerical simulation method to study the rolling process of the bevel gear blank instead of the traditional expensive trail-and-error method. A three-dimensional simulation model of the Φ500 bevel gear blank radial ring rolling machine was firstly created based on the general dynamic explicit finite element code ANSYS/LS-DYNA,and then realized the virtual simulation of the entire rolling process of the bevel gear blank within a producing cycle. The simulation results displayed the real-time blank enlarging and fleck generating as well as the stress,strain and displacement contours,which are in good agreements with the real ring rolling process. It is concluded that this numerical simulation method is feasible and can be used to guide the practical rolling process of the bevel gear blank as well as other profile-shaped annular blanks. | WANG Zewu,ZENG Shuqin,YANG Xinhua,WANG Cheng (Institute of Engineering Computation and Simulation,Huazhong University of Science and Technology, Wuhan 430074,China) | 2006 | 武汉理工大学学报2006，28，S1： | 0 |
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