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A Taint Analysis Framework Applied to Android Applications in the Packed State

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China Communications 2023年第3期20卷 336-346页

作者： Shouying Bai lu ma Huan ma Wei Liu National Computer Network Emergency Response Technical Team/Coordination Center of China Beijing 100029China

In recent years,Android applications have caused personal privacy leaks *** order to analyze the malicious behavior,taint analysis technology can be used to track the API call chain,build a control-flow graph of function,and determine whether there is a security ***,with the continuous escalation of offensive and defensive confrontation of source code,more and more applications use reinforcement technology to prevent security practitioners from performing reverse analysis,therefore it is impossible to analyze function-behavior from the source ***,we design a framework of taint analysis that applied to the Android applications,which automatically unpacks the Android APKs,restores the real source code of the App,performs taint analysis,and generates a control-flow graph of *** tests showed that the system can cope with the current mainstream reinforcement technology and restore the real Dex file ***,compared with the number of nodes before packing,the generated control-flow graph had an explosive increase,which effectively assisted manual analysis of App with the privacy leakage behaviors.

关键词： privacy disclosure unpacked technology taint analysis

An SDN/NFV Based Framework for management and Deployment of Service Based 5G Core Network

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China Communications 2018年第10期15卷 86-98页

作者： lu ma Xiangming Wen luhan Wang Zhaoming lu Raymond Knopp Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Beijing 100876 China Beijing Advanced Innovation Center for Future Internet Technology Beijing 100124 China Communication System Department EURECOM Biot 06410 France

The traffic explosion and the rising of diverse requirements lead to many challenges for traditional mobile network architecture on flexibility, scalability, and deployability. To meet new requirements in the 5 G era, service based architecture is introduced into mobile networks. The monolithic network elements(e.g., MME, PGW, etc.) are split into smaller network functions to provide customized services. However, the management and deployment of network functions in service based 5 G core network are still big challenges. In this paper, we propose a novel management architecture for 5 G service based core network based on NFV and SDN. Combined with SDN, NFV and edge computing, the proposed framework can provide distributed and on-demand deployment of network functions, service guaranteed network slicing, flexible orchestration of network functions and optimal workload allocation. Simulations are conducted to show that the proposed framework and algorithm are effective in terms of reducing network operating cost.

关键词： service based architecture 5G core network SDN NFV workload allocation

Joint system consumption minimization and workload allocation in edge-core network

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The Journal of China Universities of Posts and Telecommunications 2018年第3期25卷 45-54页

作者： Wang Shaochun lu Zhaoming Wen Xiangming Wang luhan ma lu Beijing Laboratory of Advanced Information Networks Beijing University of Posts and Telecommunications Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications

The explosive increase of smart devices and mobile traffic results intolerable network latency and degraded service to the end-users. in heavy burden on backhaul and core network, As a complement to core network, edge network contributes to relieving network burden and improving user experience. To investigate the problem of optimizing the total consumption in an edge-core network, the system consumption minimization problem is fromulated, considering the energy consumption and delay. Given that the formulated problem is a mixed nonlinear integer programming （MNIP） , a low-complexity workload allocation algorithm is proposed based on interior-point method. The proposed algorithm has an extremely short running time in practice. Finally, simulation results show that edge network can significantly complement core network with much reduced backhaul energy consumption and delay.

关键词： edge network core network system consumption optimization workload allocation

Controllable synthesis of polyoxometalates nanocubes and their specific interactions with prion proteins

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Science China Chemistry 2009年第12期52卷 2156-2160页

作者： LIANG WenTing HUANG ChengZhi ma lu Key Laboratory of luminescence and Real-time Analysis Ministry of EducationCollege of Chemistry and Chemical EngineeringSouthwest UniversityChongqing 400715China

It is found that Keggin-type of polyoxometalates nanocubes could be formed in aqueous medium under the adjustment of dimethylformamide (DMF),and could be changed from solid nanocubes to hollow ones with increasing temperature. Further investigations show that this Keggin-type of polyoxometalates nanocubes can specifically interact with prion protein,and the light scattering signals are en-hanced in proportion to the content of prion in the range of 3.36―840 ng·mL-1.

关键词： polyoxometalates nanocubes dimethylformamide light scattering spectrum prion protein Introduction

Hydrothermal-assisted grinding route for WS_(2) quantum dots(QDs)from nanosheets with preferable tribological performance

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Chinese Chemical Letters 2021年第1期32卷 583-586页

作者： Zhi-Lin Cheng lu ma Zan Liu School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou 225002China

The 2 D nanomaterials have achieved the superlubrication property whatever in solid or liquid lubrication in recent ***,whether or not the nanosheets can stably disperse in oils and smoothly enter into the asperity of friction pairs is crucial for exerting the function of *** structure of 2 D QDs is desirable for addressing these issues due to its smaller 3 D *** this study,we developed a facile preparation process for WS_(2) QDs with uniform 2 nm size from nanosheets via hydrothermal-assisted grinding *** structure of the as-obtained WS_(2) QDs was determined by a series of *** results showed that the as-obtained WS_(2) QDs exhibited the typical spectrum features of nanosized quantum *** results of the tribological performance in grease verified that the average friction coefficient(ACOFs) and wear volume(AWVs) were decreased by 7.89% and 63.90%relative to grease,respectively,exhibiting a preferable friction reducing and wear resistance.

关键词： Nanosheets WS_(2) Quantum dots Tribological performance Grease

Empathetic Personification of William Thornhill in The Secret River

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学术界 2018年第10期 225-236页

作者： ma lu Peng Qinglong Shanghai Jiao Tong University Shanghai 200240

Through a detailed text examination,this paper contends that albeit Kate Grenville'sThe Secret River is dedicated to interrogate white actions in the colonial past and expects to contribute to the process of reconciliation in Australia, it engages sympathy of readers through the empathetic personification of the protagonist William Thornhill,who is subtly positioned as a victim forced into morally dubious actions by extraordinary circumstances. The wrongdoing of the white settlers is normalized in a western conception of possessive logic,the plight of the Aborigines authentically diluted and minimized. This paper thus concludes that The Secret River is another white attempt to legitimize dispossession of the Indigenous and a failure of engagement in the national reconciliation process. This paper further points out that repressing the true history will never set Australia free; acknowledging collective guilt is the only way forward.

关键词： Empathetic personification The Secret River sympathy Kate Grenville colonization dispossession

Dietary energy sources and levels shift the multi-kingdom microbiota and functions in the rumen of lactating dairy cows

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Journal of Animal Science and Biotechnology 2020年第4期11卷 1073-1088页

作者： Tansol Park lu ma Ying ma Xiaoqiao Zhou Dengpan Bu Zhongtang Yu Department of Animal Sciences The Ohio State UniversityColumbusOHUSA The State Key Laboratory of Animal Nutrition Institute of Animal ScienceChinese Academy of Agricultural SciencesBeijingP.R.China CAAS-ICRAF Joint Lab on Agroforestry and Sustainable Animal Husbandry BeijingP.R.China.

Background: Dietary energy source and level in lactation diets can profoundly affect milk yield and *** dietary effects on lactation performance are underpinned by alteration of the rumen microbiota, of which bacteria, archaea, fungi, and protozoa may vary differently. However, few studies have examined all the four groups of rumen microbes. This study investigated the effect of both the level and source of dietary energy on rumen bacteria, archaea, fungi, and protozoa in the rumen of lactating dairy cows. A 2 × 2 factorial design resulted in four dietary treatments: low and high dietary energy levels(LE: 1.52–1.53;and HE: 1.71–1.72 Mcal/kg dry matter) and two dietary energy sources(GC: finely ground corn;and SFC: steam-flaked corn). We used a replicated 4 × 4 Latin square design using eight primiparous Chinese Holstein cows with each period lasting for 21 d. The rumen microbiota was analyzed using metataxonomics based on kingdom-specific phylogenetic markers [16 S r RNA gene for bacteria and archaea, 18 S r RNA gene for protozoa, and internally transcribed spacer 1(ITS1) for fungi] followed with subsequent functional prediction using ***: The GC resulted in a higher prokaryotic(bacterial and archaeal) species richness and Faith's phylogenetic diversity than SFC. For the eukaryotic(fungi and protozoa) microbiota, the LE diets led to significantly higher values of the above measurements than the HE diets. Among the major classified taxa, 23 genera across all the kingdoms differed in relative abundance between the two dietary energy levels, while only six genera(none being protozoal)were differentially abundant between the two energy sources. Based on prokaryotic amplicon sequence variants(ASVs) from all the samples, overall functional profiles predicted using PICRUSt2 differed significantly between LE and HE but not between the two energy sources. Fish Taco analysis identified Ruminococcus and Coprococcus as the taxa potentially contributing

关键词： Corn processing method Dietary energy level Functional profiles Multi-kingdom Rumen microbiota

Recent Developments of Dinitrogen Activation on Metal Complexes and Clusters

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Chinese Journal of Structural Chemistry 2022年第12期41卷 80-88页

作者： Xue-lu ma Meng Li Jun-Bo lu Cong-Qiao Xu Jun Li School of Chemical&Environmental Engineering China University of Mining&TechnologyBeijing 100083China Department of Chemistry Southern University of Science and TechnologyShenzhen 518055China Department of Chemistry and Key Laboratory of Organic Optoelectronics&Molecular Engineering of Ministry of Education Tsinghua UniversityBeijing 100084China

Dinitrogen(N_(2)) is the major component of the atmosphere and many factors bring about dinitrogen inertness with low reactivity. Dinitrogen activation on metal complexes and clusters under ambient condition is the long-standing goal in the modern chemistry. In this review,an attempt has been made to survey the mechanistic aspects of dinitrogen activation and functionalization based on different coordination binding modes of dinitrogen. Our goal is to provide a comprehensive survey of dinitrogen activation in order to guide the relevant research in the future.

关键词： dinitrogen activation binding mode dinitrogen complex metal cluster synergistic mechanism

Culprit vessel only versus ＂one-week＂ staged percutaneous coronary intervention for multivessel disease in patients presenting with ST-segment elevation myocardial infarction

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Journal of Geriatric Cardiology 2015年第3期12卷 226-231页

作者： Li-Xiang ma Zhen-Hua lu Le WANG Xin DU Chang-Sheng ma Department of Cardiology Beijing Anzhen Hospital Capital Medical University Beo'ing China

Objective To explore the impact of a ＂one-week＂ staged muhivessel percutaneous coronary intervention （PCI） versus culprit-only PCI on deaths and major adverse cardiac events （maCE）. Methods We retrospectively analyzed 447 patients with multivessel disease who experienced a ST-segment elevation myocardial infarction （STEMI） within 12 h before undergoing PCI between July 26, 2008 and Septem- ber 25, 201 l. After completion of PCI in the infarct artery, 201 patients still in the hospital agreed to undergo PCI in non-infarct arteries with more than 70% stenosis for a ＂one-week＂ staged multivessel PCI. A total of 246 patients only received intervention for the culprit vessel. Follow-up ended on September 9, 2014. This study examined the differences in deaths from any cause （i.e., cardiac and noncardiac） and maCE between the two treatment groups. Results Compared to a culprit-only PCI treatment approach, the ＂one-week＂ staged multivessel PCI was strongly associated with greater benefits for 55-month all cause death [41 （16.7%） vs. 13 （6.5%）, P = 0.004] and maCE [82 （33.3%） vs. 40 （19.9%）, P = 0.002] rates. In addition, there were significant differences in the number of myocardial infarctions [43 （17.5%） vs. 20 （10.0%）, P = 0.023], coronary-artery bypass grafting [CABG; 20 （8.1%） vs. 6 （3.0%）, P = 0.021], and PCI [31 （12.6%） vs. 12 （6.0%）, P - 0.018]. Patients undergoing culprit-only PCI compared to ＂one-week＂ PCI had the same number of stent thrombosis events [7 （2.8%） vs. 3 （1.5%）, P - 0.522]. Conclusions Compared to a culprit-only PCI treatment approach, ＂one-week＂ staged multi-vessel PCI was a safe and effective selection for STEMI and multi-vessel PCL

关键词： ST-segment elevation myocardial infarction Percutaneous coronary intervention Multivessel revascularization