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Electronic transport evolution across the successive structural transitions in Ni_(50-x)Fe_xTi_(50) shape memory alloys

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Chinese Physics B 2024年第7期33卷 529-536页

作者：何萍杨金颖任秋飒王彬彬吴光恒刘恩克 Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China School of Materials Science and engineering University of Science and Technology of BeijingBeijing 100083China

TiNi-based shape memory alloys have been extensively investigated due to their significant applications,but a comprehensive understanding of the evolution of electronic structure and electrical transport in a system with martensitic transformations(MT) is still *** this work,we focused on the electronic transport behavior of three phases in Ni_(50-x)Fe_xTi_(50)across the MT.A phase diagram of Ni_(50-x)Fe_xTi_(50) was established based on x-ray diffraction,calorimetric,magnetic,and electrical *** reveal the driving force of MT,phonon softening was revealed using first-principles ***,the transverse and longitudinal transport behavior changed significantly across the phase transition,which can be attributed to the reconstruction of electronic *** work promotes the understanding of phase transitions and demonstrates the sensitivity of electron transport to phase transition.

关键词： martensitic transformation electronic behavior transport properties first-principles calculations

A New Privacy-Preserving Data Publishing Algorithm Utilizing Connectivity-Based Outlier Factor and Mondrian Techniques

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Computers, Materials & Continua 2023年第8期76卷 1515-1535页

作者： Burak Cem Kara Can Eyüpoglu Department of Computer engineering Turkish Air Force AcademyNational Defence UniversityYesilyurtIstanbulTurkey Department of Computer engineering Atatürk Strategic Studies and Graduate InstituteNational Defence UniversityBesiktasIstanbulTurkey

Developing a privacy-preserving data publishing algorithm that stops individuals from disclosing their identities while not ignoring data utility remains an important goal to *** finding the trade-off between data privacy and data utility is an NP-hard problem and also a current research *** existing approaches are investigated,one of the most significant difficulties discovered is the presence of outlier data in the *** data has a negative impact on data ***,k-anonymity algorithms,which are commonly used in the literature,do not provide adequate protection against outlier *** this study,a new data anonymization algorithm is devised and tested for boosting data utility by incorporating an outlier data detection mechanism into the Mondrian *** connectivity-based outlier factor(COF)algorithm is used to detect *** is selected because of its capacity to anonymize multidimensional data while meeting the needs of real-world ***,on the other hand,is used to discover outliers in high-dimensional datasets with complicated *** proposed algorithm generates more equivalence classes than the Mondrian algorithm and provides greater data utility than previous algorithms based on *** addition,it outperforms other algorithms in the discernibility metric(DM),normalized average equivalence class size(Cavg),global certainty penalty(GCP),query error rate,classification accuracy(CA),and F-measure ***,the increase in the values of theGCPand error ratemetrics demonstrates that the proposed algorithm facilitates obtaining higher data utility by grouping closer data points when compared to other algorithms.

关键词： Data anonymization privacy-preserving data publishing k-anonymity generalization mondrian

Sorafenib sensitization in tumor therapy by iron overload and AMPK activation

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Nano Research 2024年第7期17卷 6386-6399页

作者： Jun Zhu Shoujie Zhao Yejing Zhu Shouzheng Ma Tenghui Han Fenghua Xu Huichen Li Bo Wang Zhixiong Guo Da Chen Yongquan Qu Zhimin Tian Junlong Zhao Lei Liu State Key Laboratory of Holistic Integrative Management of Gastrointestinal Cancers National Clinical Research Center for Digestive DiseasesXijing HospitalFourth Military Medical UniversityXi’an 710032China Department of General Surgery The Southern Theater Air Force HospitalGuangzhou 510602China Department of General Surgery Tangdu HospitalFourth Military Medical UniversityXi’an 710038China Department of Thoracic Surgery Tangdu HospitalFourth Military Medical UniversityXi’an 710038China Department of Neurology Airborne Army HospitalWuhan 430012China Key Laboratory of Modern Teaching Technology(Ministry of Education) Shaanxi Normal UniversityXi’an 710062China State Key Laboratory of Holistic Integrative Management of Gastrointestinal Cancers Department of Biochemistry and Molecular BiologySchool of Basic MedicineFourth Military Medical UniversityXi’an 710032China Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi’an 710072China State Key Laboratory of Holistic Integrative Management of Gastrointestinal Cancers Department of Medical Genetics and Developmental BiologyFourth Military Medical UniversityXi’an 710032China Department of Pediatrics Tangdu HospitalFourth Military Medical UniversityXi’an 710000China

Sorafenib,as a first-line drug for advanced hepatocellular carcinoma(HCC),could trigger ferroptosis by inhibiting cystine/glutamate ***,low-level intracellular iron and insufficient activation of adenosine monophosphate(AMP)-activated protein kinase(AMPK)confer impaired response to *** this study,a unique sorafenib nanocomposite dexterously modified with Fe-Material of Institut Lavoisier(sora@Fe-MIL)was synthesized to escalate intracellular iron level and activate AMPK,further potentiating the ferroptotic effect of ***,this strategic deployment of sora@Fe-MIL triggered an extensive demise of cancer cells,while manifesting negligible deleterious impact on normal *** prominent ferroptosis biomarkers,glutathione peroxidase 4(GPX4)and solute carrier family 7 member 11(SLC7A11),underwent pronounced downregulation,underscoring the efficacy of this strategy in inducing ***,the bioactivity of AMPK was considerably elevated,and its downstream targets were conspicuously inhibited by the treatment with sora@*** orthotopic HCC animal models,we observed a substantial suppression of primary in situ tumor growth,and ribonucleic acid(RNA)sequencing elucidated an elevated degree of ferroptosis and AMPK activation with the treatment of sora@*** conclusion,we proposed that the meticulously designed strategy for secure and efficacious iron release and AMPK activation could significantly potentiate the ferroptotic impact of sorafenib,thus resuscitating its therapeutic response in HCC patients.

关键词： anti-tumor ferroptosis Fe-Material of Institut Lavoisier(Fe-MIL) sorafenib adenosine monophosphate(AMP)-activated protein kinase(AMPK)

Numerical simulation of the dynamic migration mechanism and prediction of saturation of tight sandstone oil

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Science China Earth Sciences 2024年第1期67卷 179-195页

作者： Gaohui CAO Mian LIN Likuan ZHANG Lili JI Wenbin JIANG Institute of Mechanics Chinese Academy of SciencesBeijing 100190China School of engineering Science University of Chinese Academy of SciencesBeijing 100049China Institute of Geology and Geophysics Chinese Academy of SciencesBeijing 100029China

Quantitative characterization of tight sandstone oil migration and accumulation is an emerging research frontier in the field of oil and gas *** this study,a conceptual model containing multiple basic geological elements is developed,and a nonlinear seepage numerical model for tight sandstone oil migration and accumulation is *** effects of the slip effect,overpressure driving force,buoyancy,and capillary force on the migration and accumulation of tight oil are *** results showed that(1)the differences in oil migration and accumulation between tight and conventional reservoirs are reflected in the growth mode of oil saturation,distribution characteristics of oil and water,and extent of the effect of the formation dip angle;(2)the slip effect has a significant impact when the average pore throat radius is less than 150 nm and the overpressure driving force and capillary force are the main mechanical mechanisms controlling oil migration and accumulation in tight sandstone,while the coupling effect of buoyancy,capillary force,and overpressure driving force controls the upper and lower limits of oil ***,a dimensional and dimensionless identification chart for rapidly predicting the oil saturation of tight sandstone is proposed and verified using the measured *** study provides a basis for analyzing the migration and accumulation mechanisms of tight sandstone oil and a new approach for predicting oil ***,we developed digital and visual analysis methods for the migration results,enriching the expression of the dynamics of hydrocarbon accumulation.

关键词： Tight sandstone Migration and accumulation Dynamics Oil saturation Numerical simulation

An Iterative Method for Short-wave Source Localization using Direction of Arrival Measurements

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An Iterative Method for Short-wave Source Localization using...

An anti-main-lobe jamming algorithm for airborne early warning radar based on APC-SVRGD joint optimization

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作者： Linqiang Jiang Tao Tang Zhidong Wu Paihang Zhao Ziqiang Zhang Institute of Information engineering PLA strategic support force Information engineering university

The error of ionosphere can make the short-wave source localization problem further *** paper proposed an iterative method based on the ionospheric virtual height(IVH) model to jointly estimate the source position and ionosphere reflection height using direction of arrival(DOA) *** expand the region of convergence,we solve the localization problem by combining the differentiable exact penalty *** show the proposed method can reach the constrained Cramer-Rao lower bound(CCRLB).

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Journal of Systems engineering and Electronics 2022年第1期33卷 134-143页

作者： PENG Fang WU Jun WANG Shuai LI Zhijun XIANG Jianjun Aviation engineering School Air Force Engineering UniversityXi’an 710038China Air Traffic Control and Navigation School Air Force Engineering UniversityXi’an 710051China

Main lobe jamming seriously affects the detection performance of airborne early warning *** joint processing of polarization-space has become an effective way to suppress the main lobe *** avoid the main beam distortion and wave crest migration caused by the main lobe jamming in adaptive beamforming,a joint optimization algorithm based on adaptive polarization canceller(APC)and stochastic variance reduction gradient descent(SVRGD)is ***,the polarization plane array structure and receiving signal model based on primary and auxiliary array cancellation are established,and an APC iterative algorithm model is constructed to calculate the optimal weight vector of the auxiliary ***,based on the stochastic gradient descent principle,the variance reduction method is introduced to modify the gradient through internal and external iteration to reduce the variance of the stochastic gradient estimation,the airspace optimal weight vector is calculated and the equivalent weight vector is introduced to measure the beamforming ***,by setting up a planar polarization array simulation scene,the performance of the algorithm against the interference of the main lobe and the side lobe is analyzed,and the effectiveness of the algorithm is verified under the condition of short snapshot number and certain signal to interference plus noise ratio.

关键词： airborne early warning radar adaptive beamforming main-lobe interference suppression adaptive polarization canceller(APC) stochastic variance reduction gradient descent(SVRGD)

A camouflage target detection method based on local minimum difference constraints

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Journal of Systems engineering and Electronics 2023年第3期34卷 696-705页

作者： GAN Yuanying LIU Chuntong LI Hongcai LIU Zhongye School of Missile engineering Rocket Force University of EngineeringXi’an 710025China

To address the problems of missing inside and incomplete edge contours in camouflaged target detection results,we propose a camouflaged moving target detection algorithm based on local minimum difference constraints(LMDC).The algorithm first uses the mean to optimize the initial background model,removes the stable background region by global comparison,and extracts the edge point set in the potential target region so that each boundary point(seed)grows along the center of the ***,we define the minor difference constraints term,combine the seed path and the target space consistency,and calculate the attributes of each pixel in the potential target area to realize camouflaged moving target *** algorithm of this paper is verified based on a public data sofa video and test videos and compared with the five classic *** experimental results show that the proposed algorithm yields good results based on integrity,accuracy,and a number of objective evaluation indexes,and its overall performance is better than that of the compared algorithms.

关键词： camouflage target detection moving target local contrast

Evaluation method and optimization strategies of resilience for air&space defense system of systems based on kill network theory and improved self-information quantity

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Defence Technology（防务技术） 2023年第3期21卷 219-239页

作者： Qi Han Bo Pang Sen Li Ning Li Peng-song Guo Cheng-li Fan Wei-min Li Air Defense and Antimissile School Air Force Engineering UniversityXi’an710051China Graduate School Air Force Engineering UniversityXi’an710051China Information and Navigation School Air Force Engineering UniversityXi’an710077China School of Automation Science and engineering Xi'an Jiaotong UniversityXi'an710049China

Resilience of air&space defense system of systems(SoSs)is critical to national air defense ***,the research on it is still *** this study,the resilience of air&space defense SoSs is firstly defined and the kill network theory is established by combining super network and kill chain *** cases of the SoSs are considered:(a)The kill chains are relatively homogenous;(b)The kill chains are relatively ***,two capability assessment methods,which are based on the number of kill chains and improved self-information quantity,respectively,are *** improved self-information quantity modeled based on nodes and edges can achieve qualitative and quantitative assessment of the combat capability by using linguistic Pythagorean fuzzy ***,a resilient evaluation index consisting of risk response,survivability,and quick recovery is proposed ***,network models for regional air defense and anti-missile SoSs are established respectively,and the resilience measurement results are verified and analyzed under different attack and recovery strategies,and the optimization strategies are also *** proposed theory and method can meet different demands to evaluate combat capability and optimize resilience of various types of air&space defense and similar SoSs.

关键词： network optimization theory

Improvement on a batch authenticated key agreement scheme

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Frontiers of Computer Science 2022年第2期16卷 186-188页

作者： Qingfeng CHENG Ting CHEN Siqi MA Xinghua LI School of Cyber engineering Xidian UniversityXi'an 710071China strategic support force Information engineering university Zhengzhou 450001China The university of Queensland Brisbane 4072Australia

The rapid advancement in 5G networks calls for more key technologies to *** promote its wide deployment and application,ultra-dense network(UDN)plays a significant part by providing high data rate and realizing seamless coverage and low *** have proposed many related works on 5G UDN,such as the literatures[1,2].However,UDN still faces some security *** instance,it needs to guarantee the reliable and continuous connection and provide communication security.

关键词： network batch scheme