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A Fast Two-Stage Black-Box Deep Learning Network Attacking Method Based on Cross-Correlation

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Computers, Materials & Continua 2020年第7期64卷 623-635页

作者： Deyin Li mingzhi Cheng Yu Yang min lei Linfeng Shen State Key Laboratory of Public Big Data Guizhou UniversityGuiyang550025China School of Cyberspace Security Beijing University of Posts and TelecommunicationsBeijing100876China College of New Media Beijing Institute of Graphic CommunicationBeijing102600China School of Computing Science Simon Fraser UniversityBurnabyCanada

Deep learning networks are widely used in various systems that require ***,deep learning networks are vulnerable to adversarial *** study on adversarial attacks plays an important role in ***-box attacks require less knowledge about target models than white-box attacks do,which means black-box attacks are easier to launch and more ***,the state-of-arts black-box attacks still suffer in low success rates and large visual distances between generative adversarial images and original *** paper proposes a kind of fast black-box attack based on the cross-correlation(FBACC)*** attack is carried out in two *** the first stage,an adversarial image,which would be missclassified as the target label,is generated by using gradient descending *** far the image may look a lot different than the original ***,in the second stage,visual quality keeps getting improved on the condition that the label keeps being *** using the cross-correlation method,the error of the smooth region is ignored,and the number of iterations is *** with the proposed black-box adversarial attack methods,FBACC achieves a better fooling rate and fewer *** attacking LeNet5 and AlexNet respectively,the fooling rates are 100%and 89.56%.When attacking them at the same time,the fooling rate is 69.78%.FBACC method also provides a new adversarial attack method for the study of defense against adversarial attacks.

关键词： Black-box adversarial attack cross-correlation two-module

Biosorption of zinc(Ⅱ) from aqueous solution by dried activated sludge

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Journal of Environmental Sciences 2010年第5期22卷 675-680页

作者： Chunping Yang Jiaqiang Wang min lei Gengxin Xie Guangming Zeng Shenglian Luo College of Environmental Science and Engineering Hunan University Changsha 410082 China School of Environmental and Chemical Engineering Nanchang Hangkong University Nanchang 330063 China Key Laboratory of Environmental Biology and Pollution Control （Hunan University） Ministry of Education Changsha 410082 China

The biosorption potential of dried activated sludge as a biosorbent for zinc（Ⅱ） removal from aqueous solution was *** effects of initial pH,contact time,initial zinc ion concentration,and adsorbent dosage on the biosorption processes were determined,and the equilibrium data were modeled by the Langmuir and Freundlich *** Langmuir isotherm model （R 2=0.999） was proved to fit the equilibrium data much better than the Freundlich isotherm model （R 2=0.918）.The monolayer adsorption capacity of dried activated sludge for zinc（Ⅱ） was found to be 17.86 mg/g at pH of 5 and 25°*** kinetic data were tested using pseudo firstand second-order *** results suggested that the pseudo second-order model （R 2 〉 0.999） was better for the description of the adsorption behavior of zinc（Ⅱ） onto the dried activated *** transform infrared spectral analysis showed that the dominant mechanism of zinc（Ⅱ） biosorption onto the dried activated sludge was the binding between amide groups and zinc ions.

关键词： activated sludge biosorption isotherms kinetics zinc(II)

基于TiO_(2)/KCC-1固相萃取的亲水作用超高效液相色谱-串联质谱法测定南极磷虾磷脂

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食品科学 2024年第15期45卷 168-177页

作者：张欣彤唐光治沈清雷敏谭舒萍林碧玲周瑞淇梁秀碧郭莲仙李林秋广东医科大学海洋医药研究院南海海洋生物医药资源研发公共服务平台广东湛江524023 广东医科大学公共卫生学院东莞市卫生检验与检疫重点实验室广东东莞523808 浙江工商大学海洋食品研究院浙江杭州310012 上海爱博才思分析仪器贸易有限公司上海200335

以自制钛基树枝状纤维形SiO_(2)(TiO_(2)/KCC-1)纳米材料作为固相萃取(solid phase extraction,SPE)填料对南极磷虾中的磷脂进行纯化,采用亲水色谱柱结合超高效液相色谱串联质谱法进行磷脂组学分析。选取南极磷虾中最主要的4类磷脂(磷... 详细信息

以自制钛基树枝状纤维形SiO_(2)(TiO_(2)/KCC-1)纳米材料作为固相萃取(solid phase extraction,SPE)填料对南极磷虾中的磷脂进行纯化,采用亲水色谱柱结合超高效液相色谱串联质谱法进行磷脂组学分析。选取南极磷虾中最主要的4类磷脂(磷脂酰胆碱(phosphatidylcholines,PC)、磷脂酰乙醇胺(phosphatidyl ethanolamine,PE)、磷脂酰丝氨酸(phosphatidylserine,PS)、磷脂酰肌醇(phosphatidylinositol,PI))作为研究对象。结果显示,在最优条件下共检测到291种磷脂,比已报道的方法多近1倍。在这些磷脂中,含有单不饱和脂肪酸链的磷脂占总磷脂含量的54.73%,含有多不饱和脂肪酸链的磷脂占总磷脂含量的26.17%。南极磷虾中共检出PC 75种、PE 120种、PI 54种、PS 42种。其中PC(40:6)(41.63%)、PE(36:0)(39.77%)、PI(38:3)(80.05%)、PS(36:1)(81.62%)在4类磷脂中的含量最高。多元统计分析结果显示,SPE处理前后磷脂种类有明显差异,Ti O_(2)/KCC-1材料对磷脂的富集效果显著,特别是对PC(18:0/18:0)、PE(16:0/18:1)、PI(16:0/18:2)等富集作用明显。PC、PE和PS的检出限均为0.05μg/g,PI的检出限为0.01μg/g,4种磷脂的相对标准偏差在0.89%~5.05%之间,回收率在87%~112%之间。该方法专一性强、提取效率高、灵敏度和精密度高、准确度好,在生物样本中磷脂的提取、纯化及其检测方面具有广阔的应用前景。

关键词：钛基树枝状纤维形SiO_(2) 固相萃取亲水作用超高效液相色谱-串联质谱法南极磷虾磷脂

Triterpenoid saponins and phenylpropanoid glycoside from the roots of Ardisia crenata and their cytotoxic activities

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Chinese Journal of Natural Medicines 2021年第1期19卷 63-69页

作者： SONG Ning-Ning YANG lei-min ZHANG min-Jie AN Ren-Feng LIU Wei HUANG Xue-Feng School of Chinese Pharmacy China Pharmaceutical UniversityNanjing 210009China Department of Pharmacology Nanjing Medical UniversityNanjing 210029China

Two new triterpenoid saponins,ardisicrenoside R and S(1 and 2),and one new phenylpropanoid glycoside,ardicrephenin(3),along with five known compounds(4-8),were isolated from roots of Ardisia *** structures were elucidated on the basis of NMR spectroscopic data and chemical *** 2-7 were evaluated for their cytotoxic activities against A549,MCF-7,HepG2 and MDA-MB-231 cell lines by MTT ***(6)showed significant cytotoxicity,with IC50 values of 1.17±0.01,1.19±0.06,3.52±0.23,and 16.61±1.02μmol·L^(-1),respectively.

关键词： Ardisia crenata Triterpenoid saponins Phenylpropanoid glycoside Cytotoxicity

Progressive Collapse Resistance of a New Staggered Story Isolated System

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Audio Zero-Watermark Scheme Based on Discrete Cosine Transform-Discrete Wavelet TransformSingular Value Decomposition

Open Journal of Applied Sciences（应用科学） 2024年第3期 643页

作者： Yutong Yang Yuancheng Mi Hong Li Zhongfa Guo Dewen Liu Weiwei Sun min lei

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China Communications 2016年第7期13卷 117-121页

作者： min lei Yu Yang Xiaoming Liu mingZhi Cheng Rui Wang Information Security Center Beijing University of Posts and TelecommunicationsBeijingChina Nanjing University of Information Science&Technology(NUIST) NanjingChina National Computer Network Emergency Response Technical Team/Coordination Center of China Information Engineering School of Beijing Institute of Graphic Communication BeijingChina Information Science&Technology Northwest UniversityXi'anChina

Traditional watermark embedding schemes inevitably modify the data in a host audio signal and lead to the degradation of the host *** this paper,a novel audio zero-watermarking algorithm based on discrete wavelet transform(DWT),discrete cosine transform(DCT),and singular value decomposition(SVD) is *** watermark is registered by performing SVD on the coefficients generated through DWT and DCT to avoid data modification and host signal *** results show that the proposed zero-watermarking algorithm is strongly robust to common signal processing methods such as requantization,MP3 compression,resampling,addition of white Gaussian noise,and low-pass filtering.

关键词： zero-watermark discrete wavelet transform discrete cosine transform singular value decomposition

High-efficiency trace Na extraction from crystal quartz ore used for fused silica-——A pretreatment technology

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International Journal of minerals,Metallurgy and Materials 2017年第10期24卷 1075-1086页

作者： min Lin Zhen-yu Pei Yuan-yuan Liu Zhang-jie Xia Kang Xiong Shao-min lei En-wen Wang School of Resources and Environmental Engineering Wuhan University of Technology School of Resources and Environmental Engineering Anshun University

Trace Na sources, extraction dynamics of trace Na, and influences of calcination temperature on quartz lattice, fluid inclusions, and muscovite were studied in detail herein for trace Na extraction from the quartz ore with water leaching at 90℃. Experimental results suggested that the trace Na sources included quartz lattice, fluid inclusions, and muscovite. The extraction rate of the trace Na in quartz ores can reach 31.0wt% after calcination at 900℃ for 5 h and water leaching at 90℃ for 24 h. The extraction process consisting of the dissolution of unfree Na and diffusion of free Na was dominated by calcination temperature. Calcination at 900℃ for 5 h was effective for extraction of the trace Na in fluid inclusions and muscovite. The extraction of the trace Na was mainly affected by the decrepitation of fluid inclusions when the calcination temperature ranged from 400 to 600℃ and by the damage of muscovite when the calcination temperature ranged from 600 to 900℃. Based on the extraction rates at different calcination temperatures, approximately 20.1wt% of the trace Na occurred in fluid inclusions, approximately 10.9wt% existed in muscovite, and 69.0wt% mainly occurred in quartz lattice.

关键词： trace sodium extraction quartz ore fluid inclusion muscovite decrepitation calcination water leaching

Novel Zero-Watermarking Scheme Based on DWT-DCT

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China Communications 2016年第7期13卷 122-126页

作者： Yu Yang min lei Xiaoming Liu Zhiguo Qu Cheng Wang Information Security Center Beijing University of Posts and TelecommunicationsBeijingChina Nanjing University of Information Science&Technology(NUIST) NanjingChina National Computer Network Emergency Response Technical Team/Coordination Center of China College of Electronic and Information Engineering Nanjing University of Aeronautics and AstronauticsNanjingChina

Essential characteristics for watermark registration and detection without data modification can be used in anaudio zero-watermarking *** this paper,a novel audio zero-watermarking scheme based on discrete wavelet transform(DWT) and discrete cosine transform(DCT) is *** is registered by comparing the mean absolute values of the adjacent frame coefficients after DWT and *** results show that the proposed scheme is stronglyrobusttocommon attacks such as AWGN,downsampling,low-pass filtering,requantization,and MP3 compression.A performance analysis of the proposed scheme shows that all bit error rates after attacks are zero.

关键词： zero-watermark discrete wavelets transform discrete cosine transform

Formation of overpressure system and its relationship with the distribution of large gas fields in typical foreland basins in central and western China

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Petroleum Exploration and Development 2021年第3期48卷 625-640页

作者： LI Wei CHEN Zhuxin HUANG Pinghui YU Zhichao min lei LU Xuesong PetroChina Research Institute of Petroleum Exploration&Development Beijing 100083China PetroChina Southwest Oil&Gas Field Company Chengdu 610051China PetroChina Tarim Oilfield Company Korla 841000China

Based on the data of measured formation pressure, drilling fluid density of key exploration wells and calculated pressure by well logging, combined with the analysis of natural gas geological conditions, the characteristics and formation mechanisms of formation fluid overpressure systems in different foreland basins and the relationship between overpressure systems and large-scale gas accumulation are discussed.(1) The formation mechanisms of formation overpressure in different foreland basins are different. The formation mechanism of overpressure in the Kuqa foreland basin is mainly the overpressure sealing of plastic salt gypsum layer and hydrocarbon generation pressurization in deep–ultra-deep layers, that in the southern Junggar foreland basin is mainly hydrocarbon generation pressurization and under-compaction sealing, and that in the western Sichuan foreland basin is mainly hydrocarbon generation pressurization and paleo-fluid overpressure residual.(2) There are three common characteristics in foreland basins, i.e. superimposed development of multi-type overpressure and multi-layer overpressure, strong–extremely strong overpressure developed in a closed foreland thrust belt, and strong–extremely strong overpressure developed in a deep foreland uplift area.(3) There are four regional overpressure sealing and storage mechanisms, which play an important role in controlling large gas fields, such as the overpressure of plastic salt gypsum layer, the overpressure formed by hydrocarbon generation pressurization, the residual overpressure after Himalayan uplift and denudation, and the under-compaction overpressure.(4) Regional overpressure is an important guarantee for forming large gas fields, the sufficient gas source, large-scale reservoir and trap development in overpressure system are the basic conditions for forming large gas fields, and the overpressure system is conducive to forming deep to ultra-deep large gas fields.

关键词： central and western China foreland basin overpressure system large gas field hydrocarbon generation pressurization under-compaction salt gypsum layer overpressure sealing overpressure residual