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World Journal of Gastroenterology 2007年第29期13卷 4011-4014页

作者： long Wang Jian Mao Gao-Hua zhang ming-Jing Tu College of Materials Science and Engineering Sichuan University Chengdu 610064 Sichuan Province China Mechanical Department Zhongshan Torch Polytechnic Zhongshan 528436 Guangdong Province China State Key Laboratory of Biotherepy Chengdu 610041 Sichuan Province China

AIM： To investigate the apoptotic effect of photoexcited titanium dioxide （TiO2） nanoparticles in the presence of visible light on human hepatoma cell line （Bel 7402） and to study the underlying mechanism. METHODS： Cerium-element-doped titanium dioxide nanoparticles were prepared by impregnation method. Bel 7402 human hepatoma cells were cultured in RPMI 1640 medium in a humidified incubator with 50 mL/L COL at 37℃. A 15 W fluorescent lamp with continuous wavelength light was used as light source in the photocatalytic test. Fluorescence morphology and agarose gel eletrophoresis pattern were performed to analyze apoptotic cells. RESULTS： The Ce （Ⅳ）-doped TiO2 nanoparticles displayed their superiority. The adsorption edge shifted to the 400-450 nm region. With visible light illuminated for 10 min, 10 μg/cm^3 Ce （lV）-doped TiO2 induced micronuclei and significant apoptosis in 4 and 24 h, respectively. Hochest 33 258 staining of the fixed cells revealed typical apoptotic structures （apoptotic bodies）, agarose gel electrophoresis showed typical DNA ladder pattern in treated cells but not in untreated ones. CONCLUSION： Ce （Ⅳ） doped TiO2 nanoparticles can induce apoptosis of Bel 7402 human hepatoma cells in the presence of visible light.

关键词： Nano titanium dioxide Cerium Photocatalysis Apoptosis Hepatoma cells

Manufacturability and mechanical reliability study for heterogeneous integration system in display(HiSID)

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Advances in Manufacturing 2023年第2期11卷 191-202页

作者： Hao-Hui long Hui-Cai Ma Jia-Ying Gao Li zhang De-ming zhang Jian-Qiu Chen Huawei Device Co. Ltd.Shenzhen518129GuangdongPeople's Republic of China

In this paper,the system on display panel(SoDP)architecture,the primary stage of heterogeneous integration system in display(HiSID),is introduced for the first *** this architecture,the driving components of display,which are supposed to be on the display flexible print circuit(FPC)in traditional architecture,are innovatively integrated onto the backside of display *** the SoDP architecture,the simulated impact strain in the panel fan-out region can decrease about 30%compared to the traditional architecture,and SoDP provides more the 10 mm extra space in the in-plane Y-direction for holding a larger ***,the SoDP is compatible with the current organic laser emitted diode(OLED)and system in package(SiP)*** the primary stage,this paper also presents a comprehensive and extensive analysis on the challenges of the manufacturability for the advanced stage of HiSID from four key technologies perspectives:device miniaturization,massive manufacturing,driving technology,and advanced heterogeneous integration.

关键词： Display Heterogeneous integration system in display(HiSID) Manufacturability Mechanical reliability System on display panel(SoDP)

A promising method to recover spent V_(2)O_(5)-WO_(3)/TiO_(2) catalyst: treatment by vanadium-titanium magnetite sintering process

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Journal of Iron and Steel Research International 2022年第8期29卷 1176-1184页

作者： Hong-ming long Yu-dong zhang Tao Yang Li-xin Qian Zheng-wei Yu School of Metallurgical Engineering Anhui University of TechnologyMa’anshan 243002AnhuiChina Anhui Province Key Laboratory of Metallurgy Engineering and Resources Recycling Anhui University of TechnologyMa’anshan 243002AnhuiChina

A large number of spent selective catalytic reduction(SCR)denitration catalysts are produced after the ultra-low emission transformation of coal-fired power plants in *** to the China’s“Directory of National Hazardous Wastes(Version 2021)”,these spent vanadium-tungsten-titanium catalysts are classified as“HW50”hazardous waste,and their disposal and utilization processes have been strictly ***,an effective and low-cost technique was developed to treat and utilize these spent SCR catalysts by the vanadium-titanium magnetite sintering *** of adding spent SCR catalysts on the sintering production process and product quality indexes of sinter were *** results showed that adding spent SCR catalysts can improve the sintering granulation and green feed permeability,thereby increasing the productivity and flame front *** the addition proportion of spent SCR catalysts is less than 1 wt.%,the performance indexes of the finished sinter are basically equal to those of the finished sinter without adding spent SCR *** increasing the proportion of spent SCR catalysts to 2.0 wt.%results in a decrease in product quality indexes,which could be attributed to the increase in perovskite content in the finished sinter.

关键词： Spent selective catalytic reduction catalyst Hazardous waste Vanadium-titanium magnetite sintering Recovery Utilization

Synthesis, Characterization, and Reactivity of Metalla- Chalcogenirenium Compounds

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Chinese Journal of Chemistry 2021年第6期39卷 1558-1564页

作者： ming Luo Yapeng Cai Xinlei Lin Lipeng long Hong zhang Haiping Xia Shenzhen Grubbs Institute and Guangdong Provincial Key Laboratory of Catalysis Department of ChemistrySouthern University of Science and TechnologyShenzhenGuangdong 518055China College of Chemistry and Chemical Engineering Xiomen UniversityXiamenFujian 361005China

Chalcogenirenium cations,featuring an unsaturated three-membered organic ring,are limited but known to be synthesizable from alkynes with bulky electron-donating ***-chalcogenirenium compounds have been synthesized as stable compounds through the reactions of a cyclic metal-carbyne complex-metallapentalyne with PhSCI,PhSeCI or *** a result of the high strain in the three-membered metallacycles,the metalla-chalcogenirenium cations react readily with the base or chloride *** reactions furnish a series of unprecedented chalcogenirenium cations with intact M=C *** intrinsic stabilization effect of aromaticity is further elucidated by density functional calculations.

关键词： Metalla-chalcogenirenium Density functional calculations Metallacycles P-block cations Aromaticity

Lowest-energy moiré band formed by Dirac zero modes in twisted bilayer graphene

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Science Bulletin 2019年第8期64卷 495-498页

作者： long zhang Kavli Institute for Theoretical Sciences and CAS Center for Excellence in Topological Quantum Computation University of Chinese Academy of Sciences Physical Science Laboratory Huairou National Comprehensive Science Center

The recent discovery of an unconventional insulating phase and an adjacent superconducting (SC) phase in the twisted bilayer graphene (TBG)[1,2] has triggered great excitement (3–11)The two layers of graphene are rot... 详细信息

关键词： band formed by Dirac zero modes in twisted bilayer graphene Lowest-energy moir

Numerical simulation on flow field,wind erosion and sand sedimentation patterns over railway subgrades

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Journal of Mountain Science 2022年第10期19卷 2968-2986页

作者： zhang Kai ZHAO Li-ming zhang Hai-long GUO Ao-jun YANG Bo LI Sheng College of Civil Engineering Lanzhou Jiaotong UniversityLanzhou 730000China Key Laboratory of Desert and Desertification Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China

The railway subgrades in the sandy areas act as an obstacle interfering wind-blown sand,causing sand erosion and sedimentation,which can disrupt the safe and stable operation of the railway *** previous studies mainly focus on the flow field around railway subgrades,however,the real erosion and sedimentation patterns are rarely *** study aims to analyze the erosion and sand sedimentation patterns of wind-blown sand over the subgrades with different heights and steel rails using the ratio of the wall shear stress to the critical value of erosion shear *** show that wind erosion near the top of the upwind slope of the embankment and the shoulder on the upwind side are more severe,and the severity increases with an increase in the height of the *** the increase of wind velocity,sand sedimentation both on the windward and leeside of the subgrade decreases and wind erosion by reverse flow *** study indicates that railways in sandy areas should be constructed with a moderate subgrade height(4 m).

关键词： Numerical simulation Flow field Wind erosion Sand sedimentation Railway subgrades Subgrade height

Discussion on relationship between minimal energy and curve shapes

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Applied Mathematics(A Journal of Chinese Universities) 2014年第4期29卷 379-390页

作者： LI Xue-mei zhang Yong-xia MA long ZHOU Yuan-feng zhang Cai-ming School of Computer Science and Technology Shandong University Shandong Province Key Lab of Digital Media Technology Shandong University of Finance and Economics

Energy minimization has been widely used for constructing curve and surface in the fields such as computer-aided geometric design, computer graphics. However, our testing examples show that energy minimization does not optimize the shape of the curve sometimes. This paper studies the relationship between minimizing strain energy and curve shapes, the study is carried out by constructing a cubic Hermite curve with satisfactory shape. The cubic Hermite curve interpolates the positions and tangent vectors of two given endpoints. Computer simulation technique has become one of the methods of scientific discovery, the study process is carried out by numerical computation and computer simulation technique. Our result shows that：（1） cubic Hermite curves cannot be constructed by solely minimizing the strain energy; （2） by adoption of a local minimum value of the strain energy, the shapes of cubic Hermite curves could be determined for about 60 percent of all cases, some of which have unsatisfactory shapes, however. Based on strain energy model and analysis, a new model is presented for constructing cubic Hermite curves with satisfactory shapes, which is a modification of strain energy model. The new model uses an explicit formula to compute the magnitudes of the two tangent vectors, and has the properties：（1） it is easy to compute; （2） it makes the cubic Hermite curves have satisfactory shapes while holding the good property of minimizing strain energy for some cases in curve construction. The comparison of the new model with the minimum strain energy model is included.

关键词： computer simulation cubic Hermite curve minimum strain energy curve shape.

Multiplicity dependence of charged particle,? meson, and multistrange particle productions in p + p collisions at s^(1/2) = 200 GeV from PYTHIA simulation

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Nuclear Science and Techniques 2018年第9期29卷 236-241页

作者： Sheng-Hui zhang long Zhou Yi-Fei zhang ming-Wei zhang Cheng Li ming Shao Yong-Jie Sun Ze-Bo Tang University of Science and Technology of China Hefei 230026China

We report the multiplicity dependence of charged particle production for the n~±, K~±, p, , and ? mesons at |y|<1:0 in p + p collisions at s^(1/2) = 200 GeV from a PYTHIA simulation. The impact of multiple parton interactions and gluon contributions is studied and found to be a possible source of the splitting of the particle yields as a function of p_T with respect to the multiplicity. No obvious particle species dependence of the splitting is *** multiplicity dependence of the ratios Kˉ/πˉ, K^+/π^+,/πˉ, p/π^+, and K_s^0 at mid-rapidity in p+ p collisions is found to follow a tendency similar to that in Au t Au collisions at (s_(NN))^(1/2) = 200 GeV at the Relativistic Heavy Ion Collider, indicating similar underlying initial production mechanisms despite the differences in the initial colliding systems.

关键词： Particle production Heavy-ion collisions Small system Multiple parton interactions Gluon contributions

Blind estimation of phase offset in OFDM subcarrier for coherent demodulation

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Journal of Systems Engineering and Electronics 2012年第4期23卷 473-480页

作者： Jian Chen long Yang ming Li School of Telecommunications Engineering Xidian UniversityXi'an 710071E R.China

An adaptive algorithm named low complexity phase off- set estimation （LC-POE） is proposed for orthogonal frequency division multiplexing （OFDM） signals. Depending on the requirement, the estimation procedure is divided into several scales to accelerate the adaptive convergence speed and ensure the estimation accuracy. The true phase offset is estimated through shrinking the detection range and raising the resolution scale step by step. Both the convergence performance and complexity are discussed in the paper. Simulation results show the effectiveness of the proposed algorithm. The LC-POE algorithm is promising in the application of OFDM systems.

关键词： phase offset estimation (POE) coherent receiver adaptive phase recovery orthogonal frequency division multiplexing (OFDM).

Emergent vegetation flow with varying vertical porosity

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Journal of Hydrodynamics 2019年第5期31卷 1043-1051页

作者： ming-deng Zhao Zi-long Fan State Key Laboratory of Water Resources and Hydropower Engineering Science Wuhan UniversityWuhan 430072China Department of Engineering and Information Technology China International Water and Electric Corporation(CWE)Beijing 100120China China Three Gorges Corporation(CTG) Beijing J 00038China

The vertical distribution of an emergent vegetation in wetlands and marshes is generally non-uniform due to the variations of the stem thickness and the leaf *** study focuses on the effect of the varying vertical porosity on the hydrodynamic characteristics of the emergent vegetation *** new governing equation for the emergent vegetation flow with varying vertical porosity is established by applying the poroelastic media flow *** to the movement mechanism of the water flow in the porous media and the experimental data,the best fitted expression of the permeability is established for the emergent vegetation *** velocity distribution is obtained with the finite analytic ***,a flume experiment is performed using truncated cones to simulate the actual vegetation with varying vertical *** calculated velocity distribution is compared with the measured data,which shows that the theoretical results are in good agreement with the experimental ***,the influence of the vertical porosity distribution on the vegetation flow characteristics is analyzed *** study can provide a useful reference and technical support for further study of the flow with a complex shape vegetation.

关键词： Emergent vegetation flow velocity distribution varying vertical porosity finite analytic method Biot^poroelastic theory