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International Journal of Minerals,Metallurgy and Materials 2010年第2期17卷 229-233页

作者： xiao-xia li Gang Han Experimental Center College of Science Yanshan University Qinhuangdao 066004 China School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China

The magnetic force microscopy and a sample vibrating magnetometer have been used to investigate the domain structure in two antiferromagnetically coupled Co/Pt *** the antiferromagnetic coupled[Pt（0.5 nm）/Co（0.4 nm）]n/NiO（1.1 nm）/[Co（0.4 nm）/Pt（0.5 nm）]n multilayers with perpendicular anisotropy,the antiferromagnetic interlayer coupling strength increases linearly with the repetition number n in Co/Pt *** demagnetized states,relatively shifted domain walls in the two Co/Pt multilayers are observed,with net ferromagnetic stripes formed between them for the repetition number n less than 5,and the stripe width decreases with the increase of *** occurrence of these features can be attributed to the competition between the interlayer coupling and magnetostatic energies.

关键词： perpendicular anisotropy antiferromagnets interlayer coupling domain walls magnetostatic energy

Thermal decomposition effect of MgCo_(2)O_(4)nanosheets on ammonium perchlorate-based energetic molecular perovskites

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Defence Technology（防务技术） 2023年第2期20卷 111-119页

作者： Er-hai An xiao-xia li Hai-xia Zhao Ying-xin Tan Xiong Cao Peng Deng School of Environment and Safety Engineering North University of ChinaTaiyuan030051ShanxiPeople's Republic of China School of Engineering for Safety and Emergency Management Taiyuan University of Science and TechnologyTaiyuan030024China State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing100081People's Republic of China

Energetic molecular perovskites have attracted widespread attention in the fields of energy materials due to their high detonation *** this work,we reported the effect of MgCo_(2)O_(4) nanosheets on the thermal decomposition of ammonium perchlorate(NH_(4)ClO_(4),AP)-based energetic molecular perovskites(AP-based energetic molecular perovskites).The morphology and structure of the MgCo_(2)O_(4) nanosheets were *** their catalytic effect on the thermal decomposition of AP-based energetic molecular perovskites(H_2pz)[NH_(4)(ClO_(4))_(3)](PAP-4),(H_2dabco)[NH_(4)(ClO_(4))_(3)](DAP-4),(H_2mpz)[NH_(4)(ClO_(4))_(3)](PAP-M_(4)),and (H_2hpz)[NH_(4)(ClO_(4))_(3)](PAP-H_(4)) was *** results showed that MgCo_(2)O_(4) nanosheets had excellent intrinsically catalytic performance towards enhancing the thermal decomposition of AP-based energetic molecular *** adding MgCo_(2)O_(4) nanosheets,the thermal decomposition peak temperatures of PAP-4,DAP-4,PAP-M_(4),and PAP-H_(4) had been reduced by35.7℃,48.4℃,37.9℃,and 43.6℃,*** the activation energy(Ea)of the thermal decomposition of AP-based energetic molecular perovskites had been reduced,the Eaof PAP-H_(4) decreased by 46.4 kJ/mol at most among *** catalytic mechanism of MgCo_(2)O_(4) nanosheets for AP-based energetic molecular perovskites is *** work provides a reference for the future application of AP-based energetic molecular perovskites.

关键词： AP-based energetic molecular perovskites MgCo_(2)O_(4)nanosheets Thermal decomposition Catalytic performance

Facile preparation of Fe/N-based biomass porous carbon composite towards enhancing the thermal decomposition of DAP-4

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Defence Technology（防务技术） 2024年第1期31卷 288-294页

作者： Er-hai An xiao-xia li Cun-juan Yu Ying-xin Tan Zi-jun Fan Qing-xia li Peng Deng Xiong Cao School of Environment and Safety Engineering North University of ChinaTaiyuan030051PR China College of Safety and Emergency Management Engineering Taiyuan University of Science and TechnologyTaiyuan030024PR China

Fe/N-based biomass porous carbon composite(Fe/N-p Carbon) was prepared by a facile high-temperature carbonization method from biomass,and the effect of Fe/N-p Carbon on the thermal decomposition of energetic molecular perovskite-based material DAP-4 was *** porous carbonaceous materials was considered as the micro/nano support layers for in situ deposition of Fe/N ***/Np Carbon was prepared simply by the high-temperature carbonization *** was found that it showed the inherent catalysis properties for thermal decomposition of *** heat release of DAP-4/Fe/N-p Carbon by DSC curves tested had increased slightly,compared from DAP-4/Fe/N-p *** decomposition temperature peak of DAP-4 at the presence of Fe/N-p Carbon had reduced by 79°C from384.4°C(pure DAP-4) to 305.4°C(DAP-4/Fe/N-p Carbon-3).The apparent activation energy of DAP-4thermal decomposition also had decreased by 29.1 J/*** possible catalytic decomposition mechanism of DAP-4 with Fe/N-p Carbon was proposed.

关键词： Biomass materials Porous carbon DAP-4 Thermal decomposition Facile method

Vertical Price Transmission in the China's Layer Industry Chain:an Application of FDL Approach

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Agricultural Sciences in China 2011年第11期10卷 1812-1823页

作者： XU Shi-wei DONG xiao-xia li Zhe-min li Gan-qiong Key Laboratory of Digital Agricultural Early-Warning Technology Ministry of Agriculture~Agricultural Information Institute ChineseAcademy of Agricultural Sciences Beijing 100081 P.R.China

This paper examines the vertical price relationship between upstream and downstream products in China＇s layer industry chain by estimating elasticity coefficients of the price transmission. We use cointegration tests, error correction models and finite distributed lag models to analyze vertical price shifts between corn, layer feed, egg-laying chicken and egg prices. With monthly data from 1994 to 2010, our results show that various prices in China＇s layer industry chain are well integrated. In addition, our results indicate that both long-run and short-run price relationships between upstream and downstream products in layer industry chain exist and the long-run equilibrium, to a certain extent, may eliminate the short-run dynamics price deviation. We also found that the influence of corn and feed prices on egg prices is still more remarkable than egg-laying chicken prices. Our findings imply that governments should pay more attention to corn and layer feed prices in order to stabilize egg prices under the conditions of market integration.

关键词： finite distributed lag model vertical price transmission layer industry chain China

Protective effect of fasudil hydrochloride against acute renal injury in septicopyemia rats

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Asian Pacific Journal of Tropical Medicine 2015年第12期8卷 1038-1041页

作者： Xing-Han Tian Wen-Shi Jiang xiao-li li Mei-Feng li Chao-liang liu xiao-xia li Department of Critical Care Medicine Yantai Yuhuangding Hospital Affiliated to Qingdao University Medical College Emergency Department Yangshuo People's Hospital Emergency Department Affiliated Hospital of Jining Medical University

Objective:To observe the protective effect of fasudil hydrochloride against acute renal injury in septicopyemia ***:A total of 60 Wister rats were included in the study and divided into control group(n = 10),model group(n = 25) and treatment group(n = 25).Model group and treatment group received intraperitoneal injection of endotoxin(ET) to establish acute renal injury models while the control group only received daily intraperitoneal injection of normal saline 1 *** rats were taken out of model group and treatment group respectively at 1 h(T1),6 h(T2),12 h(T3),24 h(T4) and 48 h(T5),for intraperitoneal injection of ET 30 mg/*** group received intraperitoneal injection of fasudil hydrochloride 30 mg/kg 1 h before injection of *** three groups,5 mL blood samples were collected from postcava for determination of serum creatinine and urea nitrogen levels at different time *** of serum tumor necrosis factor and ET-1 were determined by using *** renal pathologic changes were observed under the ***:Serum creatinine levels in both model group and treatment group were significantly higher than control group at T2-T5(P < 0.05) while the levels in treatment group were significantly lower than control group at T3-T5(P < 0.05).At T2-T5,blood urea nitrogen levels in model group and treatment group were significantly higher than control group(P < 0.05) while the levels in treatment group were significantly lower than model group at T3-T5(P < 0.05).Concentrations of serum tumor necrosis factor in model group and treatment group were significantly higher than control group at T1-T5(P < 0.05) while the levels in treatment group were significantly lower than model group at T1-T5(P < 0.05).Serum ET-1 concentrations in model group and treatment group were significantly higher than control group at T1-T5(P <0.05) while the levels in treatment group at T1-T4 were significantly lower man model group(P <0.05).Rats in control gr

关键词： Septicopyemia Acute renal injury Fasudil hydrochlo

Multifunctional Nanoplatform Based on pH-responsive Micelle Coated with Discontinuous Gold Shell for Cancer Photothermo-chemotherapy and Photoacoustic Tomography

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Chinese Journal of Polymer Science 2018年第10期36卷 1139-1149页

作者： Yi Huang xiao-xia li Lu Zhang xiao-Yan Chen Cheng-Bo liu Jing-Qin Chen Yong Wang Xin-Tao Shuai PCFM Lab of Ministry of Education School of Materials Science and Engineering Sun Yat-Sen University Research Laboratory for Biomedical Optics and Molecular Imaging Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences

Photothermo-chemotherapy, as a new strategy for cancer treatment, incorporates the complementary advantages of photothermal therapy and chemotherapy. In this study, a pH-sensitive diblock copolymer poly（aspartic acid-butanediamine）-poly（2- （diisopropylamino）ethyl methacrylate）（PAsp（DAB）-PDPA） was synthesized and self-assembled into doxorubicin-loaded micelle, which was further used as a template to form a gold nanoshell. After fitrther modification with poly（ethylene glycol）, the resulting nanoplatform provided good biocompatibility and desirable photo-thermal conversion efficiency to facilitate photothermal therapy. Meanwhile the nanoparticle also exhibited pH sensitivity, which prevented drug loss while circulating in the blood but enabled rapid drug release after endocytosis. An improved effect was achieved with the combination of photothermal therapy and chemotherapy. In addition, systemic delivery of the nanoplatform could be monitored by photoacoustic tomography. Thereby, this multifunctional nanoplatform would be highly potential for the diagnosis and therapy of cancer.

关键词： Gold nanoshell Photoacoustic tomography Photothermo-chemotherapy pH-sensitive micelle

Preparation of imprinted monolithic column under molecular crowding conditions

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Chinese Chemical Letters 2011年第8期22卷 989-992页

作者： xiao xia li Xin liu li Hong Bai Hong Quan Duan Yan Ping Huang Zhao Sheng liu College of Pharmacy Tianjin Medical University Tianjin 300070 China Basic Medical Research Centre of Tianjin Tianjin Medical University Tianjin 300070 China These authors contributed equally to this work.

Molecular crowding is a new concept to obtain molecularly imprinted polymers（MIPs） with greater capacity and *** this work,molecular crowding agent was firstly applied to the preparation of MIPs monolithic column.A new polymerization system based on molecular crowding surrounding was developed to prepare enrofloxacin-imprinted monolith,which was composed of polystyrene and *** result showed that the monolithic MIPs under molecular crowding conditions presented good molecular recognition for enrofloxacin with an imprinting factor of 3.03.

关键词： Molecularly imprinted polymer Monolithic column Enrofloxacin Molecular crowding

Sandwich structure for enhancing the interface reaction of hexanitrohexaazaisowurtzitane and nanoporous carbon scaffolds film to improve the thermal decomposition performance

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Defence Technology（防务技术） 2022年第10期18卷 1886-1894页

作者： Shuai-da Zhu Zi-chen Hu Yu-qi Cao xiao-xia li Yu-qi Feng Xiong Cao Peng Deng Shanxi Fire&Explosion-Proofing Safety Engineering and Technology Research Center North University of ChinaTaiyuan030051PR China State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing100081PR China

Improving the thermal decomposition performance of hexanitrohexaazaisowurtzitane(CL-20)by appropriate methods is helpful to promote the combustion performance of CL-20-based solid *** this study,we synthesized a sandwich structure of CL-20 and nanoporous carbon scaffolds film(NCS)and emphatically studied the thermal decomposition performance of the composite *** analysis and differential scanning calorimetry were used to measure the thermal decomposition process of the composite *** kinetic parameters of thermal decomposition were calculated by the thermal dynamic analysis software *** results showed that the thermal decomposition performance of the sandwich structure of CL-20 and NCS was better than *** the tested samples,NCS with a pore size of 15 nm had the best catalytic activity for the thermal decomposition of ***,the thermal decomposition curve of the composite structure at the heating rate of 1 K/min was deconvoluted by mathematical method to study the thermal decomposition *** a possible catalytic mechanism was *** excellent thermal decomposition performance is due to the sandwich structure enhances the interface reaction of CL-20 and *** work may promote the extensive use of CL-20 in the field of solid rocket propellant.

关键词： CL-20 NCS Catalysis Thermal decomposition Sandwich structure

Impact of Structural Disorder on Excitonic Behaviors and Dynamics in 2D Organic-Inorganic Hybrid Perovskites

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Chinese Journal of Chemical Physics 2020年第5期33卷 561-568,I0006,I0007,I0078页

作者： xiao-xia li Shen-long Jiang Qun Zhang Hefei National Laboratory for Physical Sciences at the Microscale Department of Chemical Physicsand Synergetic Innovation Center of Quantum Information&Quantum PhysicsUniversity of Science and Technology of ChinaHefei 230026China

Two thin-film 2 D organic-inorganic hybrid perovskites,i.e.,2-phenylethylammonium lead iodide(PEPI)and 4-phenyl-1-butylammonium lead iodide(PBPI)were synthesized and investigated by steady-state absorption,temperature-dependent photoluminescence,and temperature-dependent ultrafast transient absorption *** has a longer organic chain(via introducing extra ethyl groups)than PEPI,thus its inorganic skeleton can be distorted,bringing on structural *** comparative analyses of spectral profiles and temporal dynamics revealed that the greater structural disorder in PBPI results in more defect states serving as trap states to promote exciton *** addition,the fine-structuring of excitonic resonances was unveiled by temperature-dependent ultrafast spectroscopy,suggesting its correlation with inorganic skeleton rather than organic ***,the photoexcited coherent phonons were observed in both PEPI and PBPI,pointing to a subtle impact of structural disorder on the low-frequency Raman-active vibrations of inorganic *** work provides valuable insights into the optical properties,excitonic behaviors and dynamics,as well as coherent phonon effects in 2 D hybrid perovskites.

关键词： 2D hybrid perovskites Structural disorder Exciton dynamics Excitonic resonances Coherent phonons Photoluminescence Ultrafast spectroscopy

Variation characteristics and prediction of pollutant concentration during winter in Lanzhou New District, China

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Research in Cold and Arid Regions 2020年第5期12卷 317-328页

作者： DongYu Jia xiaoxia li xiaoQing Gao liWei Yang College of Geography and Environmental Engineering Lanzhou City UniversityLanzhouGansu 730070China Northwest Regional Climate Center/Key Laboratory of Arid Climatic Change and Reducing Disaster of Gansu Province/Key Open Laboratory of Arid Climatic Change and Disaster of China Meteorological Administration/Institute of Arid Meteorology LanzhouGansu 730020China Key Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions/Northwest Institute of Eco-Environment and Resources Chinese Academy of SciencesLanzhouGansu 730000China

PM2.5 and PM10 were the main air pollutants during winter in Lanzhou New District,*** this paper,WRF model output combined with hourly monitoring data of pollutant concentration was used to analyze characteristics of the concentration change and to study the relationship between meteorological elements and PM10/PM2.5 in Lanzhou New District in January,***,the concentration changes of PM2.5 and PM10 were predicted by wavelet analysis combined with BP neural *** results show that:(1)Due to the cold front process in winter,PM2.5 was negatively correlated with the water vapor mixing ***10 was positively correlated with air temperature and negatively correlated with air pressure.(2)There was an inversion layer in the atmosphere near the high value day of PM2.5 and PM10,the surface was controlled by low pressure,low wind speed,and the situation of low value day of PM2.5 was the *** the day of high value of PM10,the air temperature below 600 hPa was higher,and the wind speed near the surface was also higher.(3)Wavelet analysis combined with BP(Back Propagation)neural network had a good prediction effect on PM2.5,which could basically reflect the hourly change of PM2.5 ***,the simulation effect of PM10 was poor,and the input parameters of surrounding pollutants should be added to improve the prediction effect.

关键词： PM2.5 PM10 WRF Wavelet neural network Lanzhou New District