检索结果-南通市图书馆

Adversarial attacks and defenses for digital communication signals identification

在线全文

学校读者我要写书评

暂无评论

Digital Communications and Networks 2024年第3期10卷 756-764页

作者： Qiao Tian Sicheng Zhang shiwen Mao Yun lin College of Computer Science and Technology Harbin Engineering UniversityHarbin150001China College of Information and Communication Engineering Harbin Engineering UniversityHarbin150000China Department of Electrical and Computer Engineering Auburn UniversityAuburnAL36849USA

As modern communication technology advances apace,the digital communication signals identification plays an important role in cognitive radio networks,the communication monitoring and management *** has become a promising solution to this problem due to its powerful modeling capability,which has become a consensus in academia and ***,because of the data-dependence and inexplicability of AI models and the openness of electromagnetic space,the physical layer digital communication signals identification model is threatened by adversarial *** examples pose a common threat to AI models,where well-designed and slight perturbations added to input data can cause wrong ***,the security of AI models for the digital communication signals identification is the premise of its efficient and credible *** this paper,we first launch adversarial attacks on the end-to-end AI model for automatic modulation classifi-cation,and then we explain and present three defense mechanisms based on the adversarial *** we present more detailed adversarial indicators to evaluate attack and defense ***,a demonstration verification system is developed to show that the adversarial attack is a real threat to the digital communication signals identification model,which should be paid more attention in future research.

关键词： Digital communication signals identification AI model Adversarial attacks Adversarial defenses Adversarial indicators

Heterogeneous expression of Osa-MIR156bc increases abiotic stress resistance and forage quality of alfalfa

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

The Crop Journal 2021年第5期9卷 1135-1144页

作者： Kexin Wang Yanrong Liu Fengkui Teng Huifang Cen Jianpin Yan shiwen lin Dayong Li Wanjun Zhang College of Grassland Science and Technology China Agricultural UniversityBeijing 100193China Key Lab of Grassland Science in Beijing China Agricultural UniversityBeijing 100193China College of Biological Science China Agricultural UniversityBeijing 100193China College of Life Sciences Shandong Normal UniversityJinan 250014ShandongChina

Alfalfa (Medicago sativa L.) is the most widely cultivated perennial leguminous forage crop *** RNA156 (miR156) precursor genes from dicotyledonous species are reportedly useful for improving alfalfa plant architecture and abiotic stress ***,there has been no report on whether a miR156 precursor gene from a monocotyledonous species functions in *** introduced two tandem precursor genes of miR156,rice Osa-MIR156b and Osa-MIR156c (Osa-MIR156bc),into *** expression of miR156 in the transgenic (TG) alfalfa was significantly *** to wild-type plants,the TG plants overexpressing miR156 had more branches and leaves and showed improved salt and drought *** of miR156 slightly reduced plant height,but the biomass yield of TG plants grown in flowerpots was still *** quality of TG plants was markedly improved by reduction of acid detergent lignin (ADL) content and increase in crude protein *** expression of the putative miR156 target genes Ms SPL6,Ms SPL12,and Ms SPL13 in TG plants was repressed by miR156overexpression,and that of all tested Ms SPLs would be sharply increased under drought or salt *** sequencing revealed that overexpression of miR156 affected the expression of genes associated with abiotic stress resistance and plant development in multiple *** first report of overexpression of monocot miR156 precursors in alfalfa sheds light on the function of mi RNA156 precursors from the monocot species rice that could be used for genetic improvement of the dicot forage crop alfalfa.

关键词： Alfalfa miR156 Biomass yield Forage quality Abiotic stress

Unraveling the atomic interdiffusion mechanism of NiFe_(2_)O_(4)oxygen carriers during chemical looping CO_(2)conversion

在线全文

学校读者我要写书评

暂无评论

Carbon Energy 2024年第8期6卷 105-121页

作者： Da Song Yan lin shiwen Fang Yang Li Kun Zhao Xinfei Chen Zhen Huang Fang He Zengli Zhao Hongyu Huang Fanxing Li Guangzhou Institute of Energy Conversion Chinese Academy of SciencesGuangzhouChina School of Energy Science and Engineering University of Science and Technology of ChinaHefeiChina College of Mechanical and Electrical Engineering Zhongkai University of Agriculture and EngineeringGuangzhouChina College of Chemistry and Bioengineering Guilin University of TechnologyGuilinChina North Carolina State University RaleighNorth CarolinaUSA

By employing metal oxides as oxygen carriers,chemical looping demonstrates its effectiveness in transferring oxygen between reduction and oxidation environments to partially oxidize fuels into syngas and convert CO_(2)into ***,NiFe_(2_)O_(4)oxygen carriers have demonstrated remarkable efficiency in chemical looping CO_(2)***,the intricate process of atomic migration and evolution within the internal structure of bimetallic oxygen carriers during continuous high‐temperature redox cycling remains ***,the lack of a fundamental understanding of the complex ionic migration and oxygen transfer associated with energy conversion processes hampers the design of high‐performance oxygen ***,in this study,we employed in situ characterization techniques and theoretical calculations to investigate the ion migration behavior and structural evolution in the bulk of NiFe_(2_)O_(4)oxygen carriers during H2 reduction and CO_(2)/lab air oxidation *** discovered that during the H2 reduction step,lattice oxygen rapidly migrates to vacancy layers to replenish consumed active oxygen species,while Ni leaches from the material and migrates to the *** the CO_(2)splitting step,Ni migrates toward the core of the bimetallic oxygen carrier,forming Fe–Ni *** the air oxidation step,Fe–Ni migrates outward,creating a hollow structure owing to the Kirkendall effect triggered by the swift transfer of lattice *** metal atom migration paths depend on the oxygen transfer *** discoveries highlight the significance of regulating the release–recovery rate of lattice oxygen to uphold the structures and reactivity of oxygen *** work offers a comprehensive understanding of the oxidation/reduction‐driven atomic interdiffusion behavior of bimetallic oxygen carriers.

关键词： chemical looping CO_(2)splitting density functional theory in situ characterization ionic migration

Magnesium promotes vascularization and osseointegration in diabetic states

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Oral Science 2024年第1期16卷 122-133页

作者： linfeng Liu Feiyu Wang Wei Song Danting Zhang Weimin lin Qi Yin Qian Wang Hanwen Li Quan Yuan shiwen Zhang State Key Laboratory of Oral Diseases&National Center for Stomatology&National Clinical Research Center for Oral Diseases&West China Hospital of Stomatology Sichuan UniversityChengduChina State Key Laboratory of Oral Diseases&National Center for Stomatology&National Clinical Research Center for Oral Diseases&Department of Oral Implantology West China Hospital of StomatologySichuan UniversityChengduChina

Diabetes has long been considered a risk factor in implant therapy and impaired wound healing in soft and hard oral *** has been proved to promote bone healing under normal ***,we elucidate the mechanism by which Mg^(2+)promotes angiogenesis and osseointegration in diabetic *** generated a diabetic mice model and demonstrated thealveolar bone healing was compromised,with significantly decreased *** then developed Mg-coating implants with hydrothermal *** implants successfully improved the vascularization and osseointegration in diabetic ***,Mg^(2+)promoted the degradation of Kelch-like ECH-associated protein 1 (Keap1) and the nucleation of nuclear factor erythroid 2-related factor 2 (Nrf2) by up-regulating the expression of sestrin 2 (SESN2) in endothelial cells,thus reducing theelevated levels of oxidative stress in mitochondria and relieving endothelial cell dysfunction under ***,our data suggested that Mg^(2+)promoted angiogenesis and osseointegration in diabetic mice by regulating endothelial mitochondria metabolism.

关键词： healing diabetic impaired

芦丁诱导猪肉肌原纤维蛋白结构变化对蛋白凝胶特性的改善作用

在线全文

学校读者我要写书评

暂无评论

食品科学 2021年第8期42卷 67-73页

作者：贾娜林世文刘丹刘登勇渤海大学食品科学与工程学院生鲜农产品贮藏加工及安全控制技术国家地方联合工程研究中心辽宁省食品安全重点实验室辽宁锦州121013

向猪肉肌原纤维蛋白氧化体系(40 mg/mL蛋白、10μmol/L FeCl3、100μmol/L VC和1 mmol/L H2O2)中添加不同量的芦丁(0、10、50、100、150μmol/g,以蛋白计),测定蛋白质的巯基含量、表面疏水性、电泳、溶解度、凝胶强度和保水性、流变特性... 详细信息

向猪肉肌原纤维蛋白氧化体系(40 mg/mL蛋白、10μmol/L FeCl3、100μmol/L VC和1 mmol/L H2O2)中添加不同量的芦丁(0、10、50、100、150μmol/g,以蛋白计),测定蛋白质的巯基含量、表面疏水性、电泳、溶解度、凝胶强度和保水性、流变特性,研究芦丁对肌原纤维蛋白结构和凝胶特性的影响。结果表明,添加芦丁使肌原纤维蛋白的巯基含量显著下降(P<0.05),表面疏水性先下降后上升;芦丁使肌球蛋白重链(myosin heavy chain,MHC)强度减弱,肌动蛋白条带强度在其较高含量下(100μmol/g和150μmol/g)降低,添加β-巯基乙醇后,MHC和肌动蛋白条带大部分被还原;溶解度随着芦丁添加量的增加而降低;芦丁用量增加,蛋白的凝胶强度与保水性显著增强(P<0.05),凝胶最终形成阶段的储能模量(G’)提高。因此,芦丁可通过与肌原纤维蛋白的共价交联或适度增加蛋白的表面疏水性而改善蛋白的凝胶特性。

关键词：芦丁肌原纤维蛋白结构凝胶特性交联

A fast forward computational method for nuclear measurement using volumetric detection constraints

在线全文

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2024年第2期35卷 47-63页

作者： Qiong Zhang lin-Lv lin University of Electronic Science and Technology of China Chengdu 610000China

Owing to the complex lithology of unconventional reservoirs,field interpreters usually need to provide a basis for interpretation using logging simulation *** the various detection tools that use nuclear sources,the detector response can reflect various types of information of the *** Monte Carlo method is one of the primary methods used to obtain nuclear detection responses in complex ***,this requires a computational process with extensive random sampling,consumes considerable resources,and does not provide real-time response ***,a novel fast forward computational method(FFCM)for nuclear measurement that uses volumetric detection constraints to rapidly calculate the detector response in various complex environments is ***,the data library required for the FFCM is built by collecting the detection volume,detector counts,and flux sensitivity functions through a Monte Carlo ***,based on perturbation theory and the Rytov approximation,a model for the detector response is derived using the flux sensitivity function method and a one-group diffusion *** environmental perturbation is constrained to optimize the model according to the tool structure and the impact of the formation and borehole within the effective detection ***,the method is applied to a neutron porosity tool for *** various complex simulation environments,the maximum relative error between the calculated porosity results of Monte Carlo and FFCM was 6.80%,with a rootmean-square error of 0.62 *** field well applications,the formation porosity model obtained using FFCM was in good agreement with the model obtained by interpreters,which demonstrates the validity and accuracy of the proposed method.

关键词： Nuclear measurement Fast forward computation Volumetric constraints

没食子酸诱导肌原纤维蛋白巯基含量和表面疏水性变化对蛋白凝胶特性的影响

在线全文

学校读者我要写书评

暂无评论

食品科学 2020年第22期41卷 1-7页

作者：贾娜林世文王乐田刘登勇渤海大学食品科学与工程学院生鲜农产品贮藏加工及安全控制技术国家地方联合工程研究中心辽宁省食品安全重点实验室辽宁锦州121013

将没食子酸(0、10、50、100、200μmol/g)添加到肌原纤维蛋白中,测定蛋白质的巯基含量、表面疏水性、溶解度、凝胶强度和保水性、流变特性,并对凝胶的微观结构进行观察,研究没食子酸诱导的肌原纤维蛋白巯基和表面疏水性变化对蛋白凝胶... 详细信息

将没食子酸(0、10、50、100、200μmol/g)添加到肌原纤维蛋白中,测定蛋白质的巯基含量、表面疏水性、溶解度、凝胶强度和保水性、流变特性,并对凝胶的微观结构进行观察,研究没食子酸诱导的肌原纤维蛋白巯基和表面疏水性变化对蛋白凝胶特性的影响。结果表明:添加没食子酸使肌原纤维蛋白的巯基含量显著降低(P0.05);没食子酸使表面疏水性显著增加(P0.05),流变曲线与对照相似,当添加量增加至50、100、200μmol/g时,凝胶强度与保水性显著降低(P<0.05),流变曲线趋于平坦;微观结构显示没食子酸添加量增大,凝胶网络结构逐渐松散,孔隙变大。因此,低添加量没食子酸(10μmol/g)对蛋白凝胶特性无不利影响,而中、高添加量没食子酸(50、100、200μmol/g)可能通过促使蛋白质发生疏水性聚集或生成巯基-醌加成物而削弱蛋白凝胶化程度,降低蛋白凝胶强度与持水能力。

关键词：没食子酸肌原纤维蛋白巯基表面疏水性凝胶特性

Enhancing Safety in Autonomous Vehicle Navigation:An Optimized Path Planning Approach Leveraging Model Predictive Control

在线全文

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2024年第9期80卷 3555-3572页

作者： Shih-lin lin Bo-Chen lin Graduate Institute of Vehicle Engineering National Changhua University of EducationChanghua50007TaiwanChina

This paper explores the application of Model Predictive Control(MPC)to enhance safety and efficiency in autonomous vehicle(AV)navigation through optimized path *** evolution of AV technology has progressed rapidly,moving from basic driver-assistance systems(Level 1)to fully autonomous capabilities(Level 5).Central to this advancement are two key functionalities:Lane-Change Maneuvers(LCM)and Adaptive Cruise Control(ACC).In this study,a detailed simulation environment is created to replicate the road network between Nantun andWuri on National Freeway No.1 in *** MPC controller is deployed to optimize vehicle trajectories,ensuring safe and efficient *** onboard sensors,including vehicle cameras and millimeterwave radar,are used to detect and respond to dynamic changes in the surrounding environment,enabling real-time decision-making for LCM and *** simulation resultshighlight the superiority of the MPC-based approach in maintaining safe distances,executing controlled lane changes,and optimizing fuel ***,the MPC controller effectively manages collision avoidance,reduces travel time,and contributes to smoother traffic flow compared to traditional path planning *** findings underscore the potential of MPC to enhance the reliability and safety of autonomous driving in complex traffic *** research will focus on validating these results through real-world testing,addressing computational challenges for real-time implementation,and exploring the adaptability of MPC under various environmental *** study provides a significant step towards achieving safer and more efficient autonomous vehicle navigation,paving the way for broader adoption of MPC in AV systems.

关键词： Autonomous driving model predictive control(MPC) lane change maneuver(LCM) adaptive cruise control(ACC)

The Existence of a Meridional Curve in Closed Incompressible Surfaces in Fully Alternating link Complements

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Annals of Mathematics,Series B 2024年第1期45卷 73-80页

作者： Wei lin School of Mathematical Sciences Dalian University of TechnologyDalian 116024LiaoningChina

Menasco showed that a closed incompressible surface in the complement of a non-split prime alternating link in S^(3) contains a circle isotopic in the link complement to a meridian of the *** on this result,he was able to argue the hyperbolicity of non-split prime alternating links in *** et *** that if F■S×I\L is an essential torus,then F contains a circle which is isotopic in S×I\L to a meridian of *** author generalizes his result as follows:Let S be a closed orientable surface,L be a fully alternating link in S×I\If F ■ S×I\L is a closed essential surface,then F contains a circle which is isotopic in S×I\L to a meridian of L.

关键词： Fully alternating Incompressible surfaces Meridionally incompressible