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Decoding and quantitative detection of antibiotics by a luminescent mixed-lanthanide-organic framework

Frontiers of Environmental Science & Engineering 2022年第12期16卷 55-65页

作者： Yuping Wang jing xia Yanxin Gao Department of Environmental Science and Engineering Fuzhou UniversityMinhou350108China State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process School of Resources and Environmental EngineeringEast China University of Science and TechnologyShanghai200237China

Due to the potential risk of antibiotics to the environment,the development of inexpensive,simple,and reliable antibiotic detection methods is significant but also faces *** this work,several lanthanide-organic frameworks(LOFs),constructed from lanthanide ions(Eu3+and/or Tb3+)and 1,3,5-benzene-tricarboxylic acid(BTC),were synthesized by solvothermal ***-S3 with comparable emission peaks of 5D4→7F5(Tb3+,545 nm)and 5D0→7F2(Eu3+,618 nm)was selected as a luminescent *** this system,the highly efficient energy transferred from the organic linker to lanthanide ions and from Tb3+to Eu3+***-S3 sensor was capable of decoding antibiotics by distinguishable emission intensity ***,a two-dimensional decoded map of antibiotics was *** linear relationship between antibiotic concentration and emission intensity ratio indicated the quantitative determination of antibiotics was *** a typical analyte,the response mechanism of nalidixic acid(NA)was investigated in *** competition of NA and BTC for UV light absorption,as well as the binding propensity of NA and Tb,affected the organic linkers-to-lanthanide ions and Tb-to-Eu energy transfer,resulting in the change of fluorescence intensity *** self-calibrating mixed-LOF sensor overcame the uncontrollable errors of the traditional absolute emission intensity method and generated stable luminescent signals in multiple ***,the integration of LOF-S3 with polymer fibers enabled the formation of a LOF-polymer fibrous composite with fluorescence detection capability,which is a promising portable sensor for practical applications.

关键词： Antibiotics Sensor Luminescence Lanthanide-organic frameworks

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Numerical analysis of magnetization AC losses in high-temperature superconducting slabs subjected to uniform strains

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Science China(Technological Sciences) 2014年第4期57卷 765-772页

作者： xia jing ZHOU YouHe Key Laboratory of Mechanics on Disaster and Environment in Western China attached to the Ministry of Education of China and Department of Mechanics and Engineering Sciences College of Civil Engineering and Mechanics Lanzhou University

High-temperature superconductors in superconductor apparatuses are subjected to mechanical strains under operating *** strains cause the degradation of the critical current densities and influence AC losses in the *** on the dynamic process of thermomagnetic interaction,we report the results of numerical analysis of AC losses in an infinite high-temperature superconducting slab subjected to a uniform in-plane strain in an alternating external magnetic field parallel to the sample *** numerical analysis shows the details of electromagnetic phenomena in the slab and the dependences of AC loss on various external parameters including the uniform strain in the slab and the amplitude and frequency of the external magnetic *** this paper,we find that whether the magnetic field fully penetrates the superconductor is the key factor that influences the features of AC *** the magnetic field cannot fully penetrate the superconductor,the loss rises with increasing strain or decreasing *** the magnetic field can fully penetrate the superconductor,the feature is just *** also analyze the effects of periodic strain on AC *** is interesting to find that when the periodic strain frequency equals the external magnetic field frequency,the AC loss reaches the maximum,regardless if the magnetic field fully penetrates the superconductor or not.

关键词： high-temperature superconducting slab AC loss strain

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An Active Defense Solution for ARP Spoofing in OpenFlow Network

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Chinese Journal of Electronics 2019年第1期28卷 172-178页

作者： xia jing CAI Zhiping HU Gang XU Ming College of Computer National University of Defense Technology School of Computer and Software Nanjing University of Information Science & Technology

As an emerging network technology,Software-defined network(SDN), has been rapidly developing for recent years due to its advantage in network management and updating. There are still a lot of open problems while applying this novel technology in reality,especially for meeting security demands. The Address resolution protocol(ARP) spoofing, a representative network attack in traditional networks is *** implement the ARP spoofing in SDN network firstly and find that the threat of ARP attack still exists and has big impact on the network. We propose a novel mechanism as defense solution for ARP spoofing oriented to OpenFlow platform. Theoretical analyzation is given, and the mechanism is implemented as a module of POX controller. Experiment results and performance evaluations show that our solution can reduce the security threat of ARP spoofing remarkably on OpenFlow platform and related SDN platforms.

关键词： Software-defined network(SDN) Address resolution protocol(ARP) spoofing OpenFlow

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Quench characteristics and mechanical responses during quench propagation in rare earth barium copper oxide pancake coils

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Applied Mathematics and Mechanics(English Edition) 2021年第2期42卷 235-250页

作者： Mengdie NIU jing xia Huadong YONG Youhe ZHOU Key Laboratory of Mechanics on Disaster and Environment in Western China The Ministry of Education of ChinaLanzhou UniversityLanzhou 730000China Department of Mechanics and Engineering Sciences College of Civil Engineering and MechanicsLanzhou UniversityLanzhou 730000China Institute of Applied Physics and Computational Mathematics Beijing 100094China

Quench and mechanical behaviors are critical issues in high temperature superconducting(HTS)*** this paper,the quench characteristics in the rare earth barium copper oxide(REBCO)pancake coil at 4.2K are analyzed,and a two-dimensional(2D)axisymmetric electro-magneto-thermal model is *** effects of the constituent materials,background field,and coil size are *** elastoplastic mechanical model is used to study the corresponding mechanical responses during the quench *** variations of the temperature and strain in superconducting layers are *** results indicate that the radial strain evolutions can reflect the transverse quench propagation and the tensile hoop and radial stresses in superconducting layers increase with the quench *** possible damages are discussed with the consideration of the effects of the background field and coil *** is concluded that the high background field significantly increases the maximum tensile hoop and radial stresses in quenching coils and local damage may be caused.

关键词： rare earth barium copper oxide(REBCO)pancake coil hoop stress quench characteristic mechanical response radial stress

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Optimization for Micro-energy Grid Dispatch Based on Non-supplementary Fired Compressed Air Energy Storage Aided Energy Hub and Hybrid Hyper-spherical Search

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Journal of Modern Power Systems and Clean Energy 2022年第4期10卷 1009-1020页

作者： Zhenlong Li Peng Li jing xia xiangqian Liu Beijing Jiaotong University BeijingChina State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power UniversityBeijingChina Beijing Goldwind Science&Creation Wind Power Equipment Co. Ltd.BeijingChina

Micro-energy grids have shown superiorities over traditional electricity and heating management *** paper presents a hybrid optimization strategy for micro-energy grid dispatch with three salient ***,to enhance the ability to support new storage equipment,an energy hub model is proposed using the non-supplementary fired compressed air energy storage(NSF-CAES).This provides flexible dispatch for cooling,heating and ***,considering the unique characteristics of the NSF-CAES,a sliding time window(STW)method is designed for simple but effective energy ***,for the optimization of energy dispatch,we blend the differential evolution(DE)with the hyper-spherical search(HSS)to formulate a hybrid DE-HSS algorithm,which enhances the global search ability and *** case studies are performed using real data of scenarios to demonstrate the superiorities of the proposed scheme.

关键词： Energy hub dispatch hyper-spherical search micro-energy grid sliding time window

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Interrogation of optical Ramsey spectrum and stability study of an ^(87)Sr optical lattice clock

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Chinese Physics B 2022年第3期31卷 306-310页

作者： jing-jing xia xiao-Tong Lu Hong Chang CAS Key Laboratory of Time and Frequency Primary Standards National Time Service CenterXi'an 710600China University of Chinese Academy of Sciences(CAS) Beijing 100049China

The optical Ramsey spectrum is experimentally realized in an ^(87)Sr optical lattice clock, and the measured linewidth agrees well with theoretical expectation. The coherence time between the clock laser and the atoms, which indicates the maximum free evolution period of using Ramsey detection to measure the atom-laser phase information, is determined as 340(23) ms by measuring the fringe contrasts of the Ramsey spectrum as a function of the free evolution period. Furthermore, with the same clock duty cycle of about 0.1, the clock stability is measured by using the Ramsey and Rabi spectra,respectively. The experimental and theoretical results show approximately the same stability as the two detection methods, which indicates that Ramsey detection cannot obviously improve the clock stability until the clock duty cycle is large enough. Thus, it is of great significance to choose the detection method of a specific clock.

关键词： optical Ramsey spectrum optical lattice clock stability coherence time

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Enigmatic earwig-like fossils from Inner Mongolia, China

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Insect Science 2010年第5期17卷 459-464页

作者： jing-xia Zhao Dong Ren Chungkun Shih College of Life Science Capital Normal University Beijing China

A new species of a new genus, Atopderma ellipta gen. et sp. nov. is described from the Middle Jurassic Jiulongshan Formation of Daohugou, Inner Mongolia, China. Because of poor preservation, the placement of these specimens is contentious, either Dermaptera or Coleoptera. However, we are inclined to attribute them to Dermaptera based on differences of five key characters. Detailed description and illustration of the specimens are given. Possible reasons for lacking good and complete abdomen preservation are also discussed.

关键词： Dermaptera Daohugou earwig-like fossil Middle Jurassic

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Relationship between testosterone and indexes indicating endothelial function in male coronary heart disease patients

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Asian Journal of Andrology 2008年第2期10卷 214-218页

作者： Lu Fu Qian-Ping Gao jing-xia Shen Cardiovascular Department the First Affiliated Hospital of Harbin Medical University Harbin 150001 China

Aim： To investigate the relationship between androgen level and the indexes indicating endothelial function in male patients with coronary heart disease （CHD）. Methods： We registered the following data for 106 50-70-year-old men： age, weight, blood lipid, including total cholesterol, low density lipoprotein cholesterol, high density lipoprotein cholesterol and triglyceride, whether a smoker, sugar levels, blood pressure, free testosterone （FT）, vascular cell adhesion molecule- 1 （VCAM- 1） and the intima-media thickness （IMT） of common carotid artery, common carotid diameter, maximum velocity in systolic phase, minimum velocity in diastolic phase and resistent index. Among the 106 men, 51 were patients with CHD. The relationships between FT level, VCAM-1 concentration and IMT were examined, respectively, using a stepwise linear regression technique among all the 106 men. Results： There was no statistical difference in terms of age, blood pressure, whether a smoker, sugar levels, HDL-C, minimum velocity in diastolic phase, resistent index between male CHD patients and controls; whereas results for weight, total cholesterol, low density lipoprotein cholesterol, triglyceride, VCAM- 1 and IMT of male CHD patients were higher than those of controls; FT level and maximum velocity in systolic phase were lower. It was found that among all the objects, FT level was inversely correlated with IMT and VCAM-1 concentration. Condusion： FT level was inversely correlated with VCAM-I concentration and IMT which are indicators of endothelial function. （Asian JAndro12008 Mar; 10： 214-218）

关键词： testosterone coronary heart disease endothelial function

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Preventing Fatal Risk through Outpatient Medical Insurance:Evidence from Urban Employee Basic Medical Insurance System in Xinjiang Uighur Autonomous Region,China

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Biomedical and Environmental Sciences 2014年第7期27卷 544-551页

作者： jing Ming xia LI xiao Ju JIAN Wei Yan Medical School of Shihezi University Department of Health Policy and Management School of Public HealthPeking University Health Science Centre

Disease burden from non-communicable diseases （NCDs） has attracted worldwide attention. The 2010 World Health Organization Global Status Report on Non -communicable Diseases showed that deaths caused by NCDs exceede... 详细信息

关键词： Preventing Fatal Risk through Outpatient Medical Insurance mode

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Synthesis and Crystal Structure of N-Phenylbis(ferrocenecarboxyl)imide

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Chinese Journal of Structural Chemistry 2007年第3期26卷 291-294页

作者： ZHAO Feng LI Ganga WU jing-xia ZHANG Zong-Pei Department of Chemistry Zhengzhou University Henan 450052 China Office of Research Administration Zhengzhou University Henan 450052 China

The ferrocenyl compound, N-phenylbis（ferrocenecarboxyl）imide （C28H23NO2Fe2, Mr = 517.17）, was synthesized and structurally characterized by means of X-ray single-crystal diffraction. It crystallizes in monoclinic, space group C2/c with a = 21.374（14）, b = 10.430（7）, c = 10.741（7） A, β= 114.184（8）°, V= 2184（2） A^3, Z= 4, Dc = 1.573 g/cm^3, F（000） = 1064, μ（MoKα） = 1.355 mm ^-1, T= 291（2） K, the final R = 0.0548 and wR = 0.1437 for 1524 observed reflections with 1 〉 2σ（I）. In this compound, the nitrogen atom links two ferrocenyl groups and one phenyl group forming a novel imido derivative.

关键词： N-phenylbis(ferrocenecarboxyl)imide synthesis crystal structure

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