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China Communications 2022年第7期19卷 53-66页

作者： Chengjian Liao Kui Xu Hongpeng Zhu xiaochen xia Qiao Su nan Sha Army Engineering University of PLA Nanjing 210007China

Aiming at the physical layer security(PLS)secure transmission existing in the information backhaul link of the satellite-UAV integrated(SUI)network,a two-layer Stackelberg game model(TSGM)that can resist full-duplex(FD)eavesdropping and jamming attacks is *** confrontation relationship between the UAV network and the attacker is established as the first layer Stackelberg *** source UAV adjusts its own transmission power strategy according to the attacker’s jamming strategy to resist malicious jamming *** internal competition and cooperation relationship in UAV network is modeled as the second layer Stackelberg game,and the optimal cooperative UAV transmits jamming signal to the attacker to resist malicious eavesdropping *** at the“selfishness”of UAV nodes,a price incentive mechanism is established to encourage UAV to actively participate in cooperation,so as to maximize the advantages of cooperative *** the proposed TSGM,we construct the utility function and analyze the closed equilibrium solution of the game model,and design a three-stage optimal response iterative(TORI)algorithm to solve the game *** simulation results show that the proposed TSGM can effectively increase the utility of the source UAV and improve the enthusiasm of cooperation compared with other power control models.

关键词： physical layer security secure transmission satellite-UAV system Stackelberg game

Model Test of Deformation Evolution and Multi Factor Prediction of Anchorage Slope Stability under Rainfall Condition

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Journal of Earth Science 2020年第6期31卷 1109-1120页

作者： Tingyao Wu Jianhong Jia nan Jiang Chuanbo Zhou Xuedong Luo Yuqing xia Faculty of Engineering China University of GeosciencesWuhan 430074China Three Gorges Geotechnical Consultants Co. Ltd.Wuhan 430074China

The stability of the anchorage slope on the Baiyang Yangtze River Highway Bridge in Yichang,China,was investigated under different rainfall conditions using model test,numerical simulation,and factor *** results of the study are as follows:(1)with the increase of rainfall intensity,the change of earth pressure can be divided into three ***,when the rainfall intensity was larger than a certain value,the change of earth pressure of cut slope became two stages;with the increase of rainfall intensity,pore water pressure increased with the increase of rainfall time,while at a certain stage after the rainfall,the pore water pressure in the cut slope did not decrease immediately,but increased for a period of time.(2)When the rainfall stopped,the stability coefficient of the anchorage slope continued to decrease,then slowly increased,and finally tended to be ***,when the rainstorm reached a certain intensity,the main factor that restricted the rainfall infiltration rate became the geotechnical permeability coefficient of the cut slope,which was no longer the rainfall intensity.(3)Factor analysis shows that the rainfall intensity and rainfall duration were the most important factors for anchorage slope stability,while earth pressure,pore water pressure and slope displacement were much less significant.

关键词： anchorage slope model test rainfall condition safety factor analysis

Voidage correction method for DEM study of 3D pebble flows in a bed of cycloidal base

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Particuology 2024年第10期93卷 30-40页

作者： Zirui xia Minglei Shi Quan Zou nan Gui Xingtuan Yang Jiyuan Tu Shengyao Jiang Institute of Nuclear and New Energy Technology Collaborative Innovation Center of Advanced Nuclear Energy TechnologyKey Laboratory of Advanced Reactor Engineering and SafetyMinistry of EducationTsinghua UniversityBeijing100084China Department of Engineering Physics Tsinghua UniversityBeijing100084China Department of Automation Tsinghua UniversityBeijing100084China School of Engineering RMIT UniversityMelbourneVIC3083Australia

Voidage(porosity or void fraction)in packed particles(or pebbles)is of fundamental importance in calculating the pressure drop,obtaining the drag,predicting the bed permeability,estimating the neutron streaming,*** the case when particles are deformed,a method of voidage correction during the packing state is proposed using a Discrete Element Method(DEM)simulation of 3D pebble flow inside a bed of cycloidal base.A function to evaluate the remaining volume of a pebble intercepted by horizontal and vertical planes is proposed for voidage *** that,the process of solving voidage distribution is provided in *** this method,the voidage inside the cycloidal-base pebble bed is obtained to refer to reported similar data for *** method can be potentially used for dynamical voidage calculation in CFD-DEM simulation which can get suitable voidage distribution after the correction.

关键词： Voidage Pebbleflow Packed bed Discreteelementmethod Cycloidal base KD-Tree Volume correction

High Brightness and Efficiency Yellow-Emitting Organic Electroluminescent Device

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Chinese Physics Letters 1999年第3期16卷 226-228页

作者： HUANG Jing-song XIE zhi-yuan YANG Kai-xia LI Chuan-nan HOU Jing-ying LIU Shi-yong National Laboratory of Integrated Optoelectronics Jilin UniversityChangchun 130023

Yellow-light-emitting organic electroluminescent device with multilayer thin-film structure,which shows high brightness and efficiency,is *** hole-transport layer is an N,N'-bis(3-methyphenyl)-N,N'-diphenylbe-nzidine *** electron-transport layer is an 8-(quinolinolate)-aluminum(A1q)*** luminescent layer consists of a host material Alq and an emitting dopant 5,6,11,*** doped device exhibited the maximum emission 40000cd/m^(2) at 19V,and the maximum efficiency of 3.141m/W,which have been improved by about six and three times,respectively,in comparison with that in undoped *** the unpackaged device,a luminance half-life on the order of about 230 h has been achieved with a constant current density of 15mA/cm^(2),starting at 500cd/m^(2) at the room temperature under ambient atmosphere.

关键词： Efficiency dopant starting

Experimental investigation of wall-bounded turbulence drag reduction by active control of double piezoelectric vibrator

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Journal of Hydrodynamics 2020年第4期32卷 747-757页

作者： Jian-xia Bai Yong-xiang Huang nan Jiang Xing-yu Ma Zhan-qi Tang Department of Mechanics School of Mechanical EngineeringTianjin UniversityTianjin 300354China Department of Mathematics Tianjin University Renai CollegeTianjin 301636China State Key Laboratory of Marine Environmental Science College of Ocean and Earth SciencesXiamen UniversityXiamen 361102China Tianjin Key Laboratory of Modern Engineering Mechanics Tianjin 300354China

In order to manipulate the large-scale coherent structures in the wall-bounded turbulence and reduce the skin-friction,an active-control experimental investigation is performed by using the synchronous and asynchronous vibrations of double piezoelectric vibrators embedded spanwisely on a smooth flat plate surface.A TSI-IFA300 hot-wire anemometer and a TSI-1621 A-Tl.5 hot-wire probe are used to measure the time series of the instantaneous velocity at different *** influences of the vibrations on the wall-bounded turbulence are compared in a multi-scale point of view.A disturbance Reynolds Number Red=pd2 f/μis introduced to represent the disturbance.A probability density functions(PDFs)of the multi-scale components of the turbulence velocity and the multi-scale conditional phase-averaged waveform are studied in detail using the wavelet *** results show that the maximum drag reduction rate 18.54%is obtained at 100 V/160 Hz and Red=0.54 in the asynchronous vibration *** disturbances generated by the vibrators have a significant influence on the sweep events of the *** asynchronous vibration model is more effective than the synchronous vibration one.A possible physical mechanism is suggested to explain why the disturbance frequency of 160 Hz leads to an optimal parameter set for the drag reduction.

关键词： Wall-bounded turbulence active control drag reduction piezoelectric vibrator multi-scale analysis conditional phase-averaged wavefonns coherent structure

Inspired by novel radiopharmaceuticals:Rush hour of nuclear medicine

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Chinese Journal of Cancer Research 2023年第5期35卷 470-482页

作者： Yang Liu Ya-nan Ren Yan Cui Song Liu zhi Yang Hua Zhu nan Li Key Laboratory of Carcinogenesis and Translational Research(Ministry of Education/Beijing) NMPA Key Laboratory for Research and Evaluation of Radiopharmaceuticals(National Medical Products Administration)Department of Nuclear MedicinePeking University Cancer Hospital&InstituteBeijing 100142China State Key Laboratory of Holistic Integrative Management of Gastrointestinal Cancers Beijing Key Laboratory of Carcinogenesis and Translational ResearchNMPA Key Laboratory for Research and Evaluation of Radiopharmaceuticals(National Medical Products Administration)Department of Nuclear MedicinePeking University Cancer Hospital&InstituteBeijing 100142China

Nuclear medicine plays an irreplaceable role in the diagnosis and treatment of *** are important components of nuclear *** the radiopharmaceuticals approved by the Food and Drug Administration(FDA),radio-tracers targeting prostate-specific membrane antigen(PSMA)and somatostatin receptor(SSTR)have held essential positions in the diagnosis and treatment of prostate cancers and neuroendocrine neoplasms,*** recent years,FDA-approved serials of immune-therapy and targeted therapy drugs targeting programmed death 1(PD-1)/programmed death ligand 1(PD-L1),human epidermal growth factor receptor 2(HER2),and nectin cell adhesion molecule 4(Nectin 4).How to screen patients suitable for these treatments and monitor the therapy?Nuclear medicine with specific radiopharmaceuticals can visualize the expression level of those targets in systemic lesions and evaluate the efficacy of *** addition to radiopharmaceuticals,imaging equipment is also a key step for nuclear *** equipment including total-body positron emission tomography/computed tomography(PET/CT)and positron emission tomography/magnetic resonance imaging(PET/MRI)has been developed,which contribute to the diagnosis and treatment of tumors,as well as the development of new ***,we conclude most recently advances of radiopharmaceuticals in nuclear medicine,and they substantially increase the“arsenal”of clinicians for tumor therapy.

关键词： Nuclear medicine radiopharmaceuticals neoplasms

Effect of maize sowing area changes on agricultural water consumption from 2000 to 2010 in the West Liaohe Plain, China

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Journal of Integrative Agriculture 2016年第6期15卷 1407-1416页

作者： YANG Ling YANG Yan-zhao FENG zhi-ming ZHENG Ya-nan Institute of Geographical Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 P.R. China University of Chinese Academy of Sciences Beijing 100049 P.R. China

The West Liaohe Plain is located in the eastern Inner Mongolia, known as the golden maize belt in China, where maize acreage has continued to rise in recent years. Water is the main limiting factor for maize production in the region, therefore, this study calculated the effect of maize sowing area changes on agricultural water consumption in the West Liaohe Plain in 2000, 2005 and 2010, based on remote sensing and meteorological data. Maize remote sensing classification was con- structed based on moderate-resolution imaging spectroradiometer, normalized difference vegatation index （MODIS NDVI） data. Then the maize sown area and water requirement and irrigation water resources were investigated. Finally, the effect of the maize sowing area changes on agricultural water consumption in the West Liaohe Plain was systematically analyzed in 2000, 2005, and 2010. The results showed that maize sown areas rose from 2000 to 2010 and were concentrated in the center of the West Liaohe Plain. Average per unit maize water deficit amount also increased in an uneven distribution, increasing from the south, east and north to the center and west of the West Liaohe Plain. The per unit area maize water deficit increased from 2000 to 2010, and reached 266 mm in 2000, 272 mm in 2005 and 273 mm in 2010, respectively. and the study concluded that water deficit during the whole growth period of maize in the West Liaohe Plain was defined by a single peak curve. The maize water requirements increased with maize sowing area changes from 2000 to 2010, and the maize water requirements increased from 0.89 billion m3 in 2000 to 1.19 billion m3 in 2005, and 1.21 billion m3 in 2010.

关键词： maize maize water requirement irrigation water resources West Liaohe Plain

Influence of Yttrium Addition on the Reduction Property of Tungsten Oxide Prepared via Wet Chemical Method

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Acta Metallurgica Sinica(English Letters) 2020年第2期33卷 275-280页

作者： nan Liu zhi Dong Zongqing Ma Zhu Qian Lei Ma Liming Yu Yongchang Liu State Key Lab of Hydraulic Engineering Simulation and Safety School of Materials Science and EngineeringTianjin UniversityTianjin 300072China Tianjin Zhujin Technology Development Corporation Tianjin 300400China

W-Y2O3 composite nanopowders prepared via wet chemical method exhibit unique morphologies and micro *** yttrium addition during chemical reaction process affects not only the composition of tungsten acid hydrate precursors,but also the reduction property of tungsten oxide transformed from *** this study,the morphology evolution of the samples with and without yttrium during reduction process has been studied,and it is found that the addition of yttrium can exert a strong influence on the reduction route of tungsten oxide and the final morphology of tungsten *** cause of the difference of reduction route and tungsten particle morphology is also *** is suggested that the composition of the samples with yttrium at the beginning of reduction is pure cubic system WO3(c-WO3),and the c-WO3 particles have c-WO3 whiskers attached to the *** kind of whiskers is essential for c-WO3 to be reduced directly to tungsten and also helpful to obtain W-Y2O3 powders with small size and good uniformity.

关键词： W–Y2O3 nanopowders Wet chemical method Reduction property

Applications of low temperature calorimetry in material research

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Chinese Chemical Letters 2018年第5期29卷 664-670页

作者： Xin Liu Jipeng Luo nan Yin zhi-Cheng Tan Quan Shi Thermochemistry Laboratory Liaoning Province Key Laboratory of Thermochemistry for Energy and Materials Dalian National Laboratory for Clean EnergyDalian Institute of Chemical Physics Chinese Academy of Sciences

Low temperature calorimetry is an experimental method of heat capacity measurements, and heatcapacity is one of the most important and fundamental thermodynamic properties of substances. Theheat capacity can provide an average evaluation of the thermal property of a sample since it is a bull（property of substances. In the other hand, the condensed states of substances could be mainly controlledby the molecular motions, intermolecular interactions, and interplay among molecular structures. Thephysical property reflected in a material may be closely related to the energy changes in these threefactors, which can be directly observed in a heat capacity curve. Therefore, low temperature calorimetryhas been used not only to obtain heat capacity, entropy, enthalpy and Gibbs free energy, but also toinvestigate and understand lattice vibrations, metals, superconductivity, electronic and nuclearmagnetism, dilute magnetic systems and structural transitions. In this review, we have presented theconcept of low temperature calorimetry and its applications in the related field of material researches,such as nano-materials, magnetic materials, ferroelectric materials, phase change materials and othermaterials.

关键词： Low Temperature Calorimetry Heat Capacity Thermodynamics Physical Propertie Materials

Phosphorous Enrichment in Molten Adjusted Converter Slag: Part I Effect of Adjusting Technological Conditions

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Journal of Iron and Steel Research International 2011年第11期18卷 17-19,39页

作者： WANG nan LIANG zhi-gang CHEN Min ZOU Zong-shu School of Materials and Metallurgy Northeastern University Shenyang 110819 Liaoning China

The effects of adjusting technological conditions on the phosphorous enrichment of adjusted converter slag were investigated. The results showed that the phosphorus could he effectively enriched to 2CaO · SiO2 and 2CaO · SiO2-3CaO· P2O5 solid solution （SS, namely phosphorus-rich phase） to be formed with the decreasing of basicity and cooling rate. Moreover, the morphology of the phosphorus-rich phase changed from granular for the original converter slag with higher basicity to the coexistence of granular shape and rod-like for the adjusted slag with lower basicity. P2 05 content in phosphorus-rich phase exceeded 30° while the hasicity was 1.3 at the cooling rate of 1.0 ℃/min.

关键词： phosphorous enrichment adjusting technological condition adjusted converter slag phosphorus-richphase