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NBA:defensive distillation for backdoor removal via neural behavior alignment

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Cybersecurity 2023年第4期6卷 76-87页

作者： Zonghao ying Bin wu State Key Laboratory of Information Security Institute of Information EngineeringChinese Academy of SciencesBeijingChina School of Cyber Security University of Chinese Academy of SciencesBeijingChina

Recently,deep neural networks have been shown to be vulnerable to backdoor attacks.A backdoor is inserted into neural networks via this attack paradigm,thus compromising the integrity of the *** soon as an attacker presents a trigger during the testing phase,the backdoor in the model is activated,allowing the network to make specific wrong *** is extremely important to defend against backdoor attacks since they are very stealthy and *** this paper,we propose a novel defense mechanism,Neural Behavioral Alignment(NBA),for backdoor *** optimizes the distillation process in terms of knowledge form and distillation samples to improve defense performance according to the characteristics of backdoor *** builds high-level representations of neural behavior within networks in order to facilitate the transfer of ***,NBA crafts pseudo samples to induce student models exhibit backdoor neural *** aligning the backdoor neural behavior from the student network with the benign neural behavior from the teacher network,NBA enables the proactive removal of *** experiments show that NBA can effectively defend against six different backdoor attacks and outperform five state-of-the-art defenses.

关键词： Deep neural network Backdoor removal Knowledge distillation

Metapelitic Garnet-Muscovite-Al_2SiO_5-Quartz(GMAQ) Geothermobarometry

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Journal of Earth Science 2018年第5期29卷 977-988页

作者： Chun-ming wu College of Earth and Planetary Sciences University of Chinese Academy of Sciences

The garnet-muscovite geothermometer and garnet-muscovite-Al2SiO5 -quartz （GMAQ） geobarometer have been empirically calibrated under P-T conditions of 1-12 kbar and 460-760 ℃ using natural metapelitic rocks. The chemical compositions of the calibrant muscovite are in the ranges of Fe=0.03-0.21 atoms, Mg=0.02-0.32 atoms and AI VI=1.62-1.96 atoms, respectively, on the ll-oxygen basis per formula unit. The garnet-muscovite thermometer yields similar temperature estimates to the well calibrated garnet-biotite thermometer within error of 4-55 ℃, and successfully discriminates the systematic temperature change of the different zones of either the prograde or inverted metamorphic terranes or thermal contact aureoles. The six formulations of GMAQ barometry yield similar pressure estimates to the well calibrated GASP barometer within error of ±1.2 kbar, and plot the Al2SiOs-bearing metapelite into the correct stability field of the AI2SiOs polymorphs. Moreover, the GMAQ thermobarometers show that the pressure is almost constant for every thermal contact aureole within limited geographic region, which reflects geological condition. The random errors are estimated to be of ca. 4-60 ℃ and 4-1.4 kbar for the geothermometer and geobarometer, respectively. A spreadsheet for applying GMAQ geothermo- barometry is supplied in the Electronic Supplementary Materials.

关键词： Al2SiO5 application calibration garnet geothermobarometry muscovite.

Strategies for constructing manganese-based oxide electrode materials for aqueous rechargeable zinc-ion batteries

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Chinese Chemical Letters 2022年第3期33卷 1236-1244页

作者： ying Liu Xiang wu School of Materials Science and Engineering Shenyang University of TechnologyShenyang 110870China State Key Laboratory of High-Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China State Key Laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao 066004China

Commercial lithium-ion batteries (LIBs) have been widely used in various energy storage systems. However, many unfavorable factors of LIBs have prompted researchers to turn their attention to the development of emerging secondary batteries. Aqueous zinc ion batteries (AZIBs) present some prominent advantages with environmental friendliness, low cost and convenient operation feature. MnO_(2) electrode is the first to be discovered as promising cathode material. So far, manganese-based oxides have made significant progresses in improving the inherent capacity and energy density. Herein, we summarize comprehensively recent advances of Mn-based compounds as electrode materials for ZIBs. Especially, this review focuses on the design strategies of electrode structures, optimization of the electrochemical performance and the clarification of energy storage mechanisms. Finally, their future research directions and perspective are also proposed.

关键词： Aqueous zinc ion batteries Mn-based compounds Cathode materials MnO_(2) Secondary batteries

Windborne migration routes of newly-emerged fall armyworm from Qinling Mountains-Huaihe River region,China

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Journal of Integrative Agriculture 2021年第3期20卷 694-706页

作者： wu Qiu-lin SHEN Xiu-jing HE Li-mei JIANG Yu-ying LIU Jie HU Gao wu Kong-ming State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant ProtectionChinese Academy of Agricultural SciencesBeijing 100193P.R.China College of Plant Protection Fujian Agriculture and Forestry UniversityFuzhou 350002P.R.China National Agro-Tech Extension and Service Center Beijing 100125P.R.China Department of Entomology Nanjing Agricultural UniversityNanjing 210095P.R.China

The fall armyworm(FAW,Lepidoptera:Noctuidae),Spodoptera frugiperda(***),invaded China in mid-December 2018;since then,it has become a great threat to Chinese agricultural *** Mountains-Huaihe River region(QM-HRR)is the transitional zone between northern and southern China,an important region for both corn and wheat *** on the actual occurrence of QM-HRR invaded by FAW in 2019,daily mean surface air temperature and nocturnal wind conditions at 925 hPa were examined,and migratory routes of FAW moths originated in QM-HRR were modeled by a forward-trajectory-analysis *** results indicated that migratory activities of FAW adults emerged in QM-HRR were initiated from late *** moths from western QM-HRR,where has complex topographic terrain,mainly flied to Ningxia and Inner Mongolia before mid ***,FAW moths from the eastern QM-HRR primarily engaged in high-altitude northward transport assisted by the prevailing southerly winds before mid August,and the North China Plain was identified as the main destination of ***,the migration trajectories of FAW moths had a possibility to reach the Northeast China *** mid August,FAW moths in eastern QM-HRR largely migrated southward and returned to the Yangtze River *** study provides detailed information on the occurrence and migration routes of FAW moths from QM-HRR and will be helpful for early warning and development of integrated pest management strategies for the control of this exotic insect pest.

关键词： Spodoptera frugiperda invasive pest Qinling Mountains-Huaihe River region atmospheric circulation windborne migration trajectory

Von Neumann Algebras Associated with the Group SL2（R）

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Acta Mathematica Sinica,English Series 2011年第9期27卷 1697-1704页

作者： Wen ming wu School of Mathematics and Computer Science Operations Research Laboratory Chongqing Normal University Chongqing 400047 P. R. China

Let M and N be the yon Neumann algebras induced by the rational action of the group SL2（R） and its subgroup P on the upper half plane H. We have shown that N is spatial isomorphic to the group von Neumann algebra Lp and characterized M and its commutant M＇ and gotten a generalization of the Mautner＇s lemma. It is also shown that the Berezin operator commutates with the Laplaeian operator.

关键词： Rational actions SL2 (R) von Neumann algebras compact operators

Toward better electrode/electrolyte interfaces in the ionic-liquid-based rechargeable aluminum batteries

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Journal of Energy Chemistry 2020年第6期29卷 98-102,I0004页

作者： Haoyi Yang Feng wu ying Bai Chuan wu Beijing Key Laboratory of Environmental Science and Engineering and School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China Collaborative Innovation Center of Electric Vehicles in Beijing Beijing 100081China

The past decade has witnessed the germination of rechargeable aluminum batteries(RABs)with the colossal potential to enact as a device for the large scale energy storage and *** Majority of investigations are dedicated to the exploration of suitable cathode materials,while less is known about the electrode/electrolyte interfaces that determine the electrochemistry of *** this perspective,we will highlight the significance of electrode/electrolyte interface for RABs,in overall kinetics and capacity *** will be laid on the complicated yet basic understandings of the phenomena at the interfaces,including the dendrite growth,surface Al2O3 and solid–electrolyte-interphase(SEI).And we will summarize the reported practice in effort to build better electrode/electrolyte interfaces in *** the end,outlook regarding to the challenges,opportunities and directions is presented.

关键词： Electrochemistry Interface Rechargeable aluminum battery

Engineered DNase-inactive Cpf1 variants to improve targeting scope for base editing in ***

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Synthetic and Systems Biotechnology 2021年第4期6卷 326-334页

作者： Zehua Chen Jinyuan Sun ying Guan ming Li Chunbo Lou Bian wu CAS Key Laboratory of Microbial Physiological&Metabolic Engineering and State Key Laboratory of Microbial Resources Institute of MicrobiologyChinese Academy of SciencesBeijing100101China College of Life Sciences University of Chinese Academy of SciencesBeijing100149China Tsinghua University Beijing100084China

The development of base editing(BE)technology has opened a new avenue for research studies in bacteriology,particularly for bacterial species in which the DNA double-strand breaks(DSBs)introduced by CRISPR/Cas system would lead to cell ***,a major limitation of BE-mediated gene editing is the restricted editable sites in the target bacterial genome due to highly diverse genomic compositions,such as GC ***,we developed a broad-spectrum DNase-inactive Cpf1(dCpf1)variant from Francisella novicida(bsdFnCpf1)through directed *** resulting optimized mutant showed a substantially expanded targeting range,including previously non-canonical protospacer-adjacent motifs(PAMs),especially the GC-rich *** deaminase APOBEC1 and uracil DNA glycosylase inhibitor(UGI)were fused with bsdFnCpf1 to achieve specific C to T mutations at multiple target sites with canonical or non-canonical PAMs in the *** genome without compromising cell *** anticipate that bsdFnCpf1 could be applied for multiplex gene regulation and BE in species that have been reported to be suitable for Cpf1.

关键词： Base editing Directed evolution Broad-spectrum dFnCpf1(bsdFnCpf1) Multiple gene editing

Key technology and application of AB_(2) hydrogen storage alloy in fuel cell hydrogen supply system

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Materials Reports(Energy) 2024年第1期4卷 113-122页

作者： ming Yao Jianguang Yuan Bao Zhang Youhua Yan Shaoxiong Zhou ying wu School of Energy Power and Machinery Engineering North China Electric Power UniversityNo.2 BeinongluChangping DistrictBeijing 102206China Institute of Energy Power Innovation North China Electric Power UniversityNo.2 BeinongluChangping DistrictBeijing 102206China Jiangsu JITRI Advanced Energy&Materials Research Institute Co. LtdNo.5 ChongyinanluXinbei DistrictChangzhou 213000China

At present,there is limited research on the application of fuel cell power generation system technology using solid hydrogen storage materials,especially in hydrogen-assisted *** the disadvantages of low hydrogen storage capacity and poor kinetics of hydrogen storage materials,our primary focus is to achieve smooth hydrogen ab-/desorption over a wide temperature range to meet the requirements of fuel cells and their integrated power generation *** this paper,the Ti_(0.9)Zr_(0.1)Mn_(1.45)V_(0.4)Fe_(0.15) hydrogen storage alloy was successfully prepared by arc *** maximum hydrogen storage capacity reaches 1.89 wt% at 318 *** alloy has the capability to absorb 90% of hydrogen storage capacity within 50 s at 7 MPa and release 90% of hydrogen within 220 *** Multiphysics 6.0 software was used to simulate the hydrogen ab-/desorption processes of the *** flow rate of cooling water during hydrogen absorption varied in a gradient of(0.02 t x)m s^(-1)(x=0,0.02,0.04,0.06,0.08,0.1,0.12).Cooling water flow rate is positively correlated with the hydrogen absorption rate but negatively correlated with the *** the cooling rate is 0.06 m s^(-1),both simulation and experimentation have shown that the hydrogen storage tank is capable of steady hydrogen desorption for over 6 h at a flow rate of 2 L min^(-1).Based on the above conclusions,we have successfully developed a hydrogen-assisted two-wheeler with a range of 80 km and achieved regional demonstration operations in Changzhou and *** paper highlights the achievements of our team in the technological development of fuel cell power generation systems using solid hydrogen storage materials as hydrogen storage carriers and their application in twowheelers in recent years.

关键词： AB_(2)hydrogen storage alloy Hydrogen storage tanks Simulation Hydrogen-electric coupling system Power-assisted two-wheelers

Unsteady analysis of six-DOF motion of a 6:1 prolate spheroid in viscous fluid

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Science China(Physics,Mechanics & Astronomy) 2017年第11期60卷 24-40页

作者： ying Xiong ying Xiong Hui Guan ChuiJie wu The Unite 91550 of People's Liberation Army of China Dalian 112023 China School of Aeronautics and Astronautics Dalian University of Technology Dalian 112024 China College of Meteorology and Oceanography National University of Defense Technology Nanjing 211101 China

Free-moving simulations of airplanes, submarines and other automobiles under extreme and emergency conditions are becoming increasingly important from operational and tactical perspectives. Such simulations are fairly challenging due to the extreme unsteady motions and high Re(Reynolds) numbers. The aim of this study is to perform a six-DOF motion simulation of a 6:1prolate spheroid that is falling in a fluid field. Prior to conducting the six-DOF simulation, some verification simulations were performed. First, a laminar flow past an inclined prolate spheroid at a Re number of 1000 and incidence angle of 45. with a tetrahedral mesh was simulated to verify the relevant targeted discrete method for an unstructured mesh. Second, to verify the LES(large eddy simulation) models and dependent parameters for the DDES(delayed detached eddy simulation), a turbulent flow past a sphere was performed at a subcritical Re number of 10000. Third, a steady maneuvering problem about a prolate spheroid pitching up from 0. to 30. incidence at a uniform angular velocity was established based on a dynamic tetrahedral mesh with changing topology and the ALE(arbitrary Lagrangian-Eulerian) method of fluid-structure coupling at a Re number of 4.2 × 10~***, two six-DOF motions of an inclined 6:1 prolate spheroid at an initial incidence of 45. were simulated at different Re numbers of 10000 and 4.2 × 10~6.

关键词： unsteady six-DOF tetrahedral dynamic mesh discrete method DDES