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Android Malware Detection Method Based on Permission Complement and API Calls

Chinese Journal of Electronics 2022年第4期31卷 773-785页

作者： YANG Jiyun TANG Jiang YAN Ran XIANG Tao College of Computer Science Chongqing University

The dynamic code loading mechanism of the Android system allows an application to load executable files externally at runtime. This mechanism makes the development of applications more convenient, but it also brings security issues. Applications that hide malicious behavior in the external file by dynamic code loading are becoming a new challenge for Android malware detection. To overcome this challenge, based on dynamic code loading mechanisms, three types of threat models,i.e. Model I, Model II, and Model III are defined. For the Model I type malware, its malicious behavior occurs in Dex Code, so the application programming interface(API)classes were used to characterize the behavior of the DexCode file. For the Model II type and Model III type malwares whose malicious behaviors occur in an external file,the permission complement is defined to characterize the behaviors of the external file. Based on permission complement and API calls, an Android malicious application detection method is proposed, of which feature sets are constructed by improving a feature selection method. Five datasets containing 15,581 samples are used to evaluate the performance of the proposed method. The experimental results show that our detection method achieves accuracy of 99.885% on general dataset, and performes the best on all evaluation metrics on all datasets in all comparison methods.

关键词： Android malicious application detection method threat models API calls Data security malicious behavior Android malware detection method Operating systems DexCode file executable files application programming interface classes Android (operating system) Ubiquitous and pervasive computing permission complement invasive software external file dynamic code loading mechanism application program interfaces feature selection method feature selection

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Laser additive manufacturing for infrastructure repair:A case study of a deteriorated steel bridge beam

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Journal of Materials Science & Technology 2023年第23期154卷 149-158页

作者： Shengbiao Zhang Peijun Hou jiyun Kang Tianyi Li Shahryar Mooraj yang Ren Catherine H.Chen A.John Hart Simos Gerasimidis Wen Chen Department of Mechanical and Industrial Engineering University of Massachusetts Amherst MA 01003 USA Department of Civil and Environmental Engineering University of Massachusetts Amherst MA 01003 SA Department of Materials Science and Engineering Massachusetts Institute of Technology Cambridge MA 02139 USA X-ray Science Division Argonne National Laboratory Lemont IL 60439 USA Massachusetts Department of Transportation Boston MA 02116 USA Department of Mechanical Engineering Massachusetts Institute of Technology Cambridge MA 02139 USA Department of Physics City University of Hong Kong Kowloon Hong Kong China

As our transportation infrastructure ages,its deterioration is becoming a growing concern.Rapid and effective methods for repair can reduce the need for time-and cost-intensive replacement of structures such as roadway bridges.In this work,laser-based additive manufacturing(AM)was developed for the repair of damaged beams in steel bridges.A corroded structural beam of low-carbon A36 steel was selected for this case study and 316L stainless steel was used for repair due to its excellent mechanical properties and corrosion resistance.Simulated repair experiments were performed on specimens extracted from the beam,and prepared with various groove shapes(Rectangular,Trapezoidal,and U-shaped).More in-depth parametric and microstructural studies were carried out with a series of U-shaped specimens repaired with the linear laser input energy varied from 19.5 to 30.0 J mm–1.The tensile properties of the repaired specimens and interface structures were also investigated in detail.It was found that the repaired specimens had a slightly higher tensile strength despite a reduction in tensile elongation compared to the A36 steel base metal.The influence of interfacial microstructure and heterogeneity on the mechanical properties of the repaired specimens was discussed.Our work suggests the promising potential to employ AM for structural repair and provides fundamental insights into processing-structure-property relationships in laser AM-repaired materials.

关键词： Additive manufacturing Structural repair Mechanical properties Transportation infrastructure Dissimilar joint

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Whole exome sequencing identifies mutations of multiple genes in a Chinese cohort of 95 sporadic probands with presumptive retinitis pigmentosa

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Journal of Bio-X Research 2018年第3期1卷 132-139页

作者： Lulin Huang Jialiang yang Shiyao Xu Yao Mao Dean Yao Lee jiyun yang Chao Qu yang Li Zhenglin yang The Key Laboratory for Human Disease Gene Study Chengdu Institute of Biology Sichuan Translational Medicine Research Hospital Chinese Academy of SciencesChengduSichuan Province Department of Ophthalmology Sichuan Academy of Medical Science and Sichuan Provincial People’s HospitalSchool of MedicineUniversity of Electronic Science and Technology of China Beijing Institute of Ophthalmology Beijing Tongren Eye CenterBeijing Tongren HospitalCapital Medical UniversityBeijing Ophthalmology&Visual Sciences Key LaboratoryBeijingChina

Retinitis pigmentosa(RP),a major cause of inherited blindness worldwide,is highly heterogeneous.This study aimed to identify mutations in a Chinese cohort of sporadic probands with presumptive RP.Whole exome sequencing represents a considerable advancement in the identification of mutations associated with Mendelian diseases,such as RP.In this study,whole exome sequencing analysis was performed in a Chinese cohort of 95 sporadic probands who were initially diagnosed with RP,in order to identify disease mutations.All detected variations were confirmed by direct Sanger sequencing,and potential pathogenicity was assessed by predictions of the mutations’functions.The overall mutation rate of presumptive RP genes for this cohort was 30.5%(n=29 of 95 probands).Forty-four mutations were identified in 19 RP genes,among which 40 mutations were novel.Eleven probands carried mutations in autosomal dominant genes(38.0%),16 probands carried mutations in autosomal recessive genes(55.2%),and 2 probands carried mutations in X-linked genes(6.9%).Twenty-eight mutations in 18 genes linked to other retinal diseases in 23 probands were also identified.Overall,mutations were detected in 52 probands(54.7%).The recurrent and novel mutations reported here will expand potential understanding of the pathogenesis of RP and other retinal diseases.

关键词： gene mutation mutation proband retinitis pigmentosa whole exome sequencing

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Molecular Epidemiology of Klebsiella pneumoniae from Clinical Bovine Mastitis in Northern Area of China,2018–2019

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Engineering 2022年第3期8卷 146-154页

作者： Shikai Song Wenjuan He Dawei yang Manar Benmouffok Yao Wang jiyun Li Chengtao Sun Xiangbin Song Shizhen Ma Chang Cai Shuangyang Ding Congming Wu Zhangqi Shen yang Wang Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety College of Veterinary MedicineChina Agricultural UniversityBeijing 100193China China Institute of Veterinary Drug Control Beijing 100081China College of Veterinary Medicine Hunan Agricultural UniversityChangsha 410125China Research and Innovation Office Murdoch UniversityMurdoch 6150Australia China Australia Joint Laboratory for Animal Health Big Data Analytics College of Animal Science and TechnologyZhejiang Agricultural and Forestry UniversityHangzhou 311300China

Klebsiella pneumoniae(K.pneumonia,KpⅠ)is a predominate inducement of bovine mastitis,which is associated with high mortality and milk yield reduction.However,data is lacking on the molecular characteristics of bovine K.pneumoniae,limiting the risk assessment of its transmission through the food chain.Herein,we investigated the prevalence of K.pneumoniae in 6301 clinical mastitis(CM)milk samples from dairy cattle in northern area of China.In total,183 K.pneumoniae isolates were recovered,with detection rates of 3.0% and 2.8% in 2018 and 2019,respectively.Like human clinical K.pneumoniae,all CM K.pneumoniae isolates belonged to one of three phylogroups:KpⅠ(n=143),Klebsiella.quasipneumoniae subsp.similipneumoniae(KpⅡ-B)(n=37),and Klebsiella variicola(KpⅢ)(n=3).We detected the extendedspectrum β-lactamase-encoding genes bla_(SHV-2a),blac_(CTX-M-14),and bla_(CTX-M-15),as well as clpC,lpfA,lacI,lacZ,lacY,and the fecABDEIR operon in the KpⅠ isolates,which may contribute to their pathogenicity and host adaptability in cows.The high prevalence of KpⅠ in dairy farms may be problematic,as it showed relatively higher rates of antibiotic resistance and virulence gene carriage than the KpⅡ-B and KpⅢ isolates.Furthermore,we observed distinct differences in population structure between CM-and human infection-associated KpⅠ isolates,with the genes associated with invasive infection in humans rarely being observed in bovine isolates,indicating that few CM-associated K.pneumoniae isolates pose a threat to human health.Nevertheless,bovine KpⅡ-B isolates shared a high level of nucleotide sequence identity with isolates from human infections and frequently carried the nitrogen-fixation gene nif,suggesting an association between KpⅡ-B isolates from cattle and humans,and plant-derived bacteria.

关键词： Clinical mastitis Klebsiella pneumonia Molecular characteristics Population structure Antimicrobial resistance

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常染色体显性多囊肾病的基因诊断与产前诊断

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中华医学遗传学杂志 2019年第5期36卷 419-423页

作者：邱碧原杨季云成都中医药大学医学技术学院 610075 自贡市妇幼保健院检验科四川643000 电子科技大学附属医院四川省人民医院人类疾病基因研究重点实验室成都610072 电子科技大学医学院成都610054 电子科技大学附属医院四川省人民医院产前诊断中心成都610072

目的研究常染色体显性遗传多囊肾病(autosomal dominant polycystic kidney disease,ADPKD)的遗传病因,为家系的遗传咨询和产前诊断提供理论依据.方法应用芯片捕获高通量测序检测17例先证者PKD1、PKD2基因,通过多个突变数据库过滤及... 详细信息

目的研究常染色体显性遗传多囊肾病(autosomal dominant polycystic kidney disease,ADPKD)的遗传病因,为家系的遗传咨询和产前诊断提供理论依据.方法应用芯片捕获高通量测序检测17例先证者PKD1、PKD2基因,通过多个突变数据库过滤及生物信息学分析,并采用Sanger测序进行家系验证.对其中一个家系行产前基因诊断.结果 17例先证者中检出14个PKD1突变,3个PKD2突变,包括6个错义突变、4个无义突变、7个移码突变.其中,8个突变位点已报道与ADPKD相关,9个突变位点未报道过:PKD1:c.7625G>T(p.Gly2542Val),c.3673C>T(p.Gln1225*),c.11048dupT(p.Thr3684Aspfs* 38),c.9083_ 9084delAG (p.Glu3028Glyfs* 40),c.10560delG(p.Pro3521 Hisfs* 6),c.7952_7974 delTGTCCCTGAGGGTCCACACTGTG(p.Va12651Glyfs*2);PKD2:c.662T>G(p.Leu221*),c.1202_1203 insCT (p.Glu401Aspfs*2),c.919 delA (p.Ser307Valfs* 10).1个家系的产前基因检测结果显示胎儿未携带与先证者相同的突变.结论明确了17个ADPKD家系的遗传病因,鉴定了PKD1、PKD2基因的9个未曾报道的新突变,丰富了ADPKD基因突变谱,为其遗传咨询和生育指导提供了理论依据.并成功对1个家系进行了产前诊断.

关键词：常染色体显性遗传多囊肾病高通量测序 PKD1基因 PKD2基因产前诊断

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Achieving gradient heterogeneous structure in Mg alloy for excellent strength-ductility synergy

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镁合金学报(英文) 2023年第7期11卷 2392-2403页

作者： Jing Han Jiapeng Sun Yuanming Song Bingqian Xu Zhenquan yang Songsong Xu Ying Han Guosong Wu jiyun Zhao School of Mechanical and Electrical Engineering China University of Mining and TechnologyXuzhou 221116China College of Mechanics and Materials Hohai UniversityNanjing 211100China Key Laboratory of Advanced Structural Materials Ministry of EducationChangchun University of TechnologyChangchun 130012China

Most metals including Mg alloys have a longstanding dilemma of strength-ductility trade-off,which is hindering their wider applications.In this study,we propose a gradient heterogeneous grain(GHG)structure for evading this trade-off dilemma and ultrasonic severe surface rolling is attempted to construct this novel structure in ZE41 Mg alloy.Here,the GHG structure combine the benefits of gradient structure and heterogeneous grain structure and introduce large microstructural heterogeneities.Compared to the coarse-grain and heterogeneous-grain structured alloys,the GHG structured one exhibits dramatical enhancement in strength,ductility,and strain hardening capability.To the best of our knowledge,its strength becomes much higher than that of common ZE41 Mg alloys at no reduction in ductility.These unique mechanical properties stem from not only the individual contribution of the heterogeneous structure components including the fine/ultrafine grains and deformed coarse grains but also their synergistic effect via hetero-deformation induced strengthening and hardening effects.In summary,our study provides a feasible way to develop new Mg alloys with high strength and good ductility.

关键词： Mg alloy ZE41 Gradient Heterostructure Strength-ductility trade-off

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基于混沌系统和动态DNA编码与运算的彩色图像加密算法

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计算机工程 2018年第2期44卷 151-157页

作者：杨吉云吴昊重庆大学计算机学院重庆400044

现有结合混沌系统和DNA计算的图像加密算法因DNA编码规则和运算规则单一、加密结构安全性低,导致算法易被破解。为此,提出一种结合Intertwining Logistic映射和动态DNA编码与运算的彩色图像加密算法。该算法包括置乱阶段和扩散阶段,在... 详细信息

现有结合混沌系统和DNA计算的图像加密算法因DNA编码规则和运算规则单一、加密结构安全性低,导致算法易被破解。为此,提出一种结合Intertwining Logistic映射和动态DNA编码与运算的彩色图像加密算法。该算法包括置乱阶段和扩散阶段,在置乱阶段,利用模拟退火算法构造的置乱序列分别对彩色图像信道进行行和列置乱,得到置乱信道。在扩散阶段,先根据随机序列值动态选择各置乱信道每个像素点的DNA编码规则及运算规则,然后结合密文反馈机制进行DNA加密计算。实验结果表明,该算法具有良好的抗攻击能力及加密效果。

关键词： Intertwining Logistic映射 DNA编码 DNA计算图像加密安全性分析

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某型直升机RCS的仿真计算与分析

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空天防御 2018年第3期1卷 44-47页

作者：杨继云中国人民解放军92941部队

直升机的雷达目标特性计算方法主要有全尺寸测量、缩比模型测量、动态测量、数学仿真计算等。本文针对直升机复杂的电磁散射特性,采用物理光学法和等效电磁流法相结合建立了一套直升机RCS仿真计算方法,然后采用该方法对某型直升机RCS进... 详细信息

直升机的雷达目标特性计算方法主要有全尺寸测量、缩比模型测量、动态测量、数学仿真计算等。本文针对直升机复杂的电磁散射特性,采用物理光学法和等效电磁流法相结合建立了一套直升机RCS仿真计算方法,然后采用该方法对某型直升机RCS进行计算,并与动态测量试验结果进行对比分析,验证该方法的有效性。

关键词：直升机 RCS 仿真计算与分析

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对进行手术的乳腺癌患者实施人性化整体护理的效果探析

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当代医药论丛 2020年第1期18卷 20-20,21页

作者：杨继云济宁市第一人民医院手术室

目的:探讨对进行手术的乳腺癌患者实施人性化整体护理的效果。方法:将2017年7月至2018年8月期间济宁市第一人民医院收治的90例乳腺癌患者平均分为对照组和观察组。在两组患者的围手术期,对对照组患者进行常规护理,对观察组患者进行人性... 详细信息

目的:探讨对进行手术的乳腺癌患者实施人性化整体护理的效果。方法:将2017年7月至2018年8月期间济宁市第一人民医院收治的90例乳腺癌患者平均分为对照组和观察组。在两组患者的围手术期,对对照组患者进行常规护理,对观察组患者进行人性化整体护理。然后比较两组患者接受治护的效果。结果:观察组患者所接受护理服务质量的平均评分、对护理的总满意率均高于对照组患者,P<0.05;其切口感染的发生率低于对照组患者,P<0.05。结论:对进行手术的乳腺癌患者实施人性化整体护理的效果较为理想,可有效地降低其术后感染的发生率,提高其对护理的满意率。

关键词：人性化整体护理乳腺癌围手术期护理

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Characterization of NDM-1-producing carbapenemase in Acinetobacter spp.and E.coli isolates from diseased pigs

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Frontiers of Agricultural Science and Engineering 2015年第3期2卷 223-229页

作者： Rongmin ZHANG yang WANG Zhihai LIU jiyun LI Wenjuan YIN Lei LEI Congming WU Jianzhong SHEN Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety College of Veterinary MedicineChina Agricultural UniversityBeijing 100193China

In recent years,the mobile metallo-β-lactamase(MBL)genes have been found to correspond to one of the most important resistance characters identified in Gramnegative bacteria,severely affecting clinical chemotherapy and threatening public health.The prevalence of mobile MBL genes and their flanking regions in Gram-negative bacteria from diseased pigs in China was investigated.A total of 334 lung samples from diseased pigs were screened for Gram-negative bacteria classified as non-susceptible to meropenem(MIC≥4mg·L^(–1)).Six isolates,including three Escherichia coli,two Acinetobacter baumanii and one A.calcoaeticus,exhibitedMBL production and carried the blaNDM-1 gene.S1-PFGE and Southern blot analysis showed that the blaNDM-1 gene was located on the chromosome of one A.baumanii isolate and on plasmids of various sizes in the other five isolates.MIC testing using broth microdilution revealed that all blaNDM-1-carrying isolates and some of their transconjugants exhibited resistance to almost allβ-lactams tested.Whole genome sequencing revealed that the flanking region of the blaNDM-1 gene from all porcine isolates had high levels of similarity with the corresponding regions in human isolates.One porcine E.coli isolate carrying blaNDM-1 was typed as ST48,a common sequence type in human E.coli isolates.These results suggest the possibility of human-tofood animal transfer of blaNDM-1-producing E.coli,highlighting the need for surveillance of carbapenemase producers among bacteria from food animals.In addition,the prudent use of antimicrobial agents to decrease the opportunities for co-selection of carbapenemase genes in food animals is also urgently needed.

关键词： carbapenemase NDM-1 ISAba125 Enterobacteriaceae food safety

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