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REVIVAL PLANS,Ten Key Sectors Benefit?

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China's Foreign Trade 2009年第24期 25-27页

作者： yantai chen,Hongbo CAI,yang xu China Institute for Science and Technology Policy,Tsinghua University School of Economy and Business Administration, Beijing Normal University.

To revive China’s industrial establishment during the biggest Great Depression in the world after World WarⅡ,China’s Central government has launched the"Revival Plans of Ten Key Sectors"plus the 4 trillion stimulus...

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Stochastic bi-resonance in non-isothermal carbon monoxide catalytic oxidation system

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Science China Chemistry 2007年第6期50卷 731-736页

作者： GONG YuBing1, xu Bo1, HAN JiQu2, xu XiuWei1 & LIU ShengDian1 1 School of Physics & Electronic Engineering, Ludong University, yantai 264025, China 2 School of Photoelectricity Information Science Technology, yantai University, yantai 264005, China School of Physics and Electronic Engineering Ludong UniversityYantai 264025China School of Photoelectricity Information Science Technology Yantai UniversityYantai 264005China

The Pt(110)/CO+O2 system subject to reaction heat, heat conduction and radiative heat transfer is non-isothermal and its temperature varies in time and space. In this paper, taking support temperature (ST) as the control parameter, the effect of the ST fluctuations in the oscillatory dynamics of the non-isothermal Pt(110)/CO+O2 system is numerically studied. It is found that the ST fluctuations may induce stochastic oscillations and the oscillations exhibit stochastic bi-resonance (SBR) with the change of the strength or correlation time of the fluctuations. This result shows that the temperature fluctuations may enhance the chemical reaction oscillations. Moreover, the system can selectively and repeatedly employ the temperature fluctuations to enhance its reaction oscillations. It is also shown when the distance of the ST temperature to the oscillatory region increases a little, the effect of the temperature fluctuations would obviously weaken.

关键词： non-isothermal system of CO catalytic oxidation, reaction rate oscillation, temperature fluctuation, stochastic bi-resonance

Glass-coated Individual Dispersed MWNTs in Alumina & Its High Temperature Stability

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Journal of Wuhan University of Technology(Materials Science) 2009年第4期24卷 647-650页

作者：付克勤 yantai Branch of China Academy of Ordnance Science

An ultrasonication assisted sol-gel processing route for MWNTs/Alumina was proposed. Using aluminum ethoxide as an alumina precursor and ethanol/water as a solvent, the duration of the transformation from sol to gel under ultrasonication can be controlled by adjusting the water content. Purified MWNTs added under ultrasonication should be functionalized by alcohol at first and a well dispersion in alumina sol could be attained under the help of ultrasonic. With the evaporation of ethanol, sol transfers to gel and MWNTS dispersion can be kept in gel. Gel and calcine-powder show that individual MWNTs are enwrapped by amorphous alumina. As-received powders after a following heating-treatment under vacuum shows a good high stability for a glass coat formed on MWNTs. Raman results show the processing route has no obvious effect on the structure of MWNTs, even a high temperature （1273K） treatment is done under vacuum.

关键词： MWNT alumina dispersion

The Design of Lens Imaging System byMeans of Fractional Fourier Transform

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Chinese Journal of Lasers 2002年第2期11卷 27-32页

作者： chen Jiannong xu Qiang (Department of Physics, yantai Teachers’ University, yantai 264025, China)D.R.Selviah(Department of Electronic and Electrical Engineering, University College London, Torrington Place, London WC1E 7JE, UK) Department of Physics Yantai Teachers' University Yantai 264025 Department of Electronic and Electrical Engineering University College London Torrington Place 英国 London WC1E 7JE

The relation between the 2nd fractional Fourier transform and the imaging process of an optical system is discussed. By changing the coordinate scales of the input plane in respect to the magnification of the optical imaging system, the fractional Fourier transform can be a powerful tool in designing specific imaging system. The Gaussian imaging formula of single lens is obtained by using the tool. Finally the procedures are generalized for designing a double-lens imaging system through an example.

关键词： lens imaging system fractional Fourier transform Gaussian imaging formula

Using radium isotopes to quantify submarine groundwater discharge at different scales in the Huanghe River Estuary,China

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Acta Oceanologica Sinica 2023年第8期42卷 32-39页

作者： Haowei xu Disong yang Xiaoyi Guo Maosheng Gao Guangquan chen Diansheng Ji Shengtao chen Huaming Yu Bochao xu Frontiers Science Center for Deep Ocean Multispheres and Earth System/Key Laboratory of Marine Chemistry Theory and Technology of Ministry of Education Ocean University of ChinaQingdao 266100China Laboratory for Marine Ecology and Environmental Science Qingdao National Laboratory for Marine Science and TechnologyQingdao 266071China College of Chemistry and Chemical Engineering Ocean University of ChinaQingdao 266100China North China Sea Environmental Monitoring Center of State Oceanic Administration/Key Laboratory of Ecological Prewarning and Protection of Bohai Sea Ministry of Natural ResourcesQingdao 266033China Shandong Provincial Key Laboratory of Marine Ecological Environment and Disaster Prevention and Mitigation Qingdao 266033China Qingdao Institute of Marine Geology Qingdao 266071China Key Laboratory of Marine Sedimentology and Environmental Geology First Institute of OceanographyMinistry of Natural ResourcesQingdao 266061China Laboratory for Marine Geology Qingdao National Laboratory for Marine Science and TechnologyQingdao 266237China yantai Marine Center Ministry of Natural ResourcesYantai 264003China North China Sea Ecological Center Ministry of Natural ResourcesQingdao 266033China Key Laboratory of Ecological Prewarning and Protection of Bohai Sea Ministry of Natural ResourcesQingdao 266033China College of Oceanic and Atmospheric Sciences Ocean University of ChinaQingdao 266100China Sanya Oceanographic Institution Ocean University of ChinaSanya 572000China

As an important land-ocean interaction process,submarine groundwater discharge(SGD)is composed of multiple dynamical processes at different scales and plays an important role in the study of coastal ocean geochemical ***,most of the existing studies focus on the quantification of the total groundwater discharge,few studies are about the differentiation and quantification of groundwater discharge processes at different scales(i.e.,short-scale SGD and long-scale SGD).As a world-class river,the Huanghe River is highly turbid and heavily regulated by *** natural and anthropogenic factors have a significant impact on groundwater discharge processes in the Huanghe River Estuary(HRE).In this study,the distribution patterns of the natural geochemical tracer radium isotopes(^(224)Ra and^(223)Ra)and other hydrological parameters in the HRE were investigated during four *** solving the mass balance of^(224)Ra and^(223)Ra in the HRE,the long-scale SGD flux was quantified as 0.01−0.19 m/d,and the short-scale SGD flux was 0.03−0.04 m/*** rate of short-scale SGD remained essentially constant among seasons,while the rate of long-scale SGD varied considerably at different periods and showed a synchronous trend with the variation of river *** results of this study are significant for understanding the SGD dynamics in the HRE and the contribution of SGD to the ocean geochemical budgets.

关键词： radium isotopes submarine groundwater discharge Huanghe River Estuary

Promoted intramolecular photoinduced-electron transfer for multi-mode imaging-guided cancer photothermal therapy

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Rare Metals 2022年第1期41卷 56-66页

作者： Xin-Yu Qu Ying Hong Han Cai xu Sun Qing Shen Dong-Liang yang Xiao-chen Dong Ai-Hong Jiao Peng chen Jin-Jun Shao Key Laboratory of Flexible Electronics and Institute of Advanced Materials Nanjing Tech UniversityNanjing 211800China Nanjing University of Information Science and Technology Nanjing 210044China Yuhuangding Hospital of Qingdao University Yantai 264000China School of Chemical and Biomedical Engineering Nanyang Technological UniversitySingapore 637459Singapore

To develop smart and efficient near-infrared(NIR)organic dyes for photothermal cancer therapy is of great ***,a pH-sensitive NIR dye BTN with donor–acceptor–donor scaffold has been *** periphery electron-donating dimethylamine groups in BTN can not only promote the intramolecular photoinduced electron transfer(PET),but also bind protons to transform into electron-deficient ammonium cation for enhanced intramolecular charge transfer(ICT)under acidic *** enveloping with amphiphilic polymeric 1,2-distearoyl-ras-glycerol-3-phosphatidyl ethanolamine-N-polyethyleneglycol-2000(DSPE-mPEG2000),BTN nanoparticles(NPs)were fabricated with robust NIR absorption covering 600–900 nm,excellent photothermal conversion efficiency(43.2%),and good ***,BTN NPs can selectively target *** tailing intravenous injection into tumor-bearing nude mice,BTN NPs demonstrate outstanding photoacoustic/photothermal/fluorescence imaging-guided photothermal therapy for tumor ablation.

关键词： Photothermal Phototherapy Near-infrared dye Photoinduced-electron transfer Intramolecular charge transfer

A homogenous microstructural Mg-based matrix model for orthopedic application with generating uniform and smooth corrosion product layer in Ringer’s solution:Study on biodegradable behavior of Mg-Zn alloys prepared by powder metallurgy as a case

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Journal of Magnesium and Alloys 2021年第1期9卷 225-240页

作者： yang Yan Xin Chu Xier Luo xuemei xu Yu Zhang YiLong Dai Ding Li Liangjian chen Tao Xiao Kun Yu School of Materials Science and Engineering Central South UniversityChangsha 410083China Department of Materials Science and Engineering Yantai Nanshan UniversityYantai 265713China The Second Xiangya Hospital Central South UniversityChangsha 410011China The Third Xiangya Hospital Central South UniversityChangsha 410011China

For high corrosion resistance and extensively modified biodegradable Mg-based alloys and composites for bone implants,a new Mgbased matrix model prepared by powder metallurgy is discussed and *** this research,Mg-5 wt.%Zn alloys were selected as a *** they were impacted by hot extrusion and aging treatments to construct microstructure with different *** selfforming corrosion product layer in Ringer’s solution,biodegradable behavior and corrosion mechanism were minutely investigated by in vitro degradation,electrochemical corrosion and *** results demonstrated the extruded Mg-5 wt.%Zn alloy aged for 96 h showed high corrosion resistance,good biocompatibility for L929 and excellent ability of maintaining sample integrity during the ***,the alloy showed fine-grain microstructure and uniform distributed hundred nano-sized second phases,which promoted the formation of the uniform and smooth corrosion product layer at the beginning of *** corrosion product layer was more stable in chloride containing aqueous solution and could be directly formed and repaired quickly,which effectively protected the matrix from further *** addition,an ideal model of Mg-based matrix for bone tissue engineering was tried to presume and propose by discussing the causal relationship between microstructure and bio-corrosion process.

关键词： Magnesium alloys Powder metallurgy Second phase Corrosion product layer Biodegradable behavior Cytocompatibility

Indication from finite-frequency tomography beneath the North China Craton： The heterogeneity of craton destruction

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Science China Earth Sciences 2018年第9期61卷 1238-1260页

作者： Xiaobing xu Liang ZHAO Kun WANG Jianfeng yang State Key Laboratory of Lithospheric Evolution Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China Chinese Academy of Sciences Center for Excellence in Tibetan Plateau Earth Sciences Beijing 100101 China

We picked new traveltime residual datasets in three frequency bands （0.02%）. 1,0.1-0.8, and 0.8-2.0 Hz） for P-waves from 793 teleseismic events and two frequency bands （0.02-0.1 and 0.1-0.8 Hz） for S-waves from 310 teleseismic events, recorded by 389 permanent stations of the China National Seismic Network and 832 broadband stations of 10 temporary arrays deployed in the North China Craton （NCC） region. The final datasets are composed of 65628 P-arrivals and 47050 S-arrivals. Based on previous research and our team＇s 2012 tomographic work, we constructed new three-dimensional P-velocity and S- velocity models of the NCC through some improvements, such as augmenting a much denser station coverage in the western NCC, considering the incident angle effect in crustal correction and using a multi-frequency joint inversion tomographic technique. The new velocity models provide several salient features, from which we draw possible inferences on regional dynamic processes. We observed high-velocity anomalies in the mantle transition zone （MTZ）. Obvious morphological het- erogeneities suggest buckling and/or fragmentation of the subducted Pacific slab, and some of the slab materials are visible below 660-kin discontinuities. The velocity structure of the eastern NCC is dominated by small-scale lateral heterogeneities. At shallow depths, high-velocity anomalies beneath the southern part of the eastern NCC and the Yanshan region likely represent a remnant of cratonic lithosphere, which may suggest that the NCC destruction is spatially non-uniform. We also detected a high-velocity anomaly in the Sulu Orogen extending downward to -300 kin, which is seemingly controlled by the Tan-Lu Fault. The northern boundary of this anomaly spatially coincides with the yantai-Qingdao-Wulian Fault, and is likely a remnant of the yangtze cratonic lithosphere subducting northwestward. Significant low-velocity anomalies imaged beneath the central NCC show a spatial discordance between their north

关键词： Upper mantle Mantle transition zone Finite frequency Multi-frequency joint inversion Wet upwellings Weak zones

Effect of Bi_2 Ti_2O_7 Seeding Layer on Capacitance-voltage Properties of Bi_(3.54)Nd_(0.46)Ti_3O_(12) Films

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Journal of Materials Science & Technology 2010年第3期26卷 206-210页

作者： Huizhong xu Liang Zhen Changhong yang Zhuo Wang School of Materials Science and Engineering Harbin Institute of Technology Harbin 150001 China School of Environment and Materials Engineering Yantai University Yantai 264005 China

Au/Bi 3.54 Nd 0.46 Ti 3 O 12 /Bi 2 Ti 2 O 7 /Si structure has been fabricated with a preferentially （111）-orientated Bi 2 Ti 2 O 7 seeding layer as a ferroelectric gate of metal-ferroelectric-insulator field effect *** 3.54 Nd 0.46 Ti 3 O 12 and Bi 3.54 Nd 0.46 Ti 3 O 12 /Bi 2 Ti 2 O 7 films are both well-crystallized when annealed at 680℃ for 40 min,and have smooth,dense and crack-free *** width of memory window of the ferroelectric gate increases with increasing electric field applied to the Bi 3.54 Nd 0.46 Ti 3 O 12 thin *** width of memory window of Au/Bi 3.54 Nd 0.46 Ti 3 O 12 /Bi 2 Ti 2 O 7 /Si with seeding layer is relatively wider than that of Au/Bi 3.54 Nd 0.46 Ti 3 O 12 /Si at the same bias voltage,and the counterclockwise hysteresis curve of Au/Bi 3.54 Nd 0.46 Ti 3 O 12 /Bi 2 Ti 2 O 7 /Si is referred to as polarization type switching at different *** 2 Ti 2 O 7 seeding layer plays an important role in alleviating the element interdiffusion between Bi 3.54 Nd 0.46 Ti 3 O 12 and Si.

关键词： Metalorganic decomposition Bismuth titanate Ferroelectric materials