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Frontiers of Chemical Science and Engineering 2024年第5期18卷 83-94页

作者： Yu meng Yitong Wang guozhu Li guozhu Liu Li Wang Key Laboratory for Green Chemical Technology of Ministry Education School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192China

Primary,secondary and tertiary amino-functionalized zirconia(ZrO_(2)-NH_(2),ZrO_(2)-NH and ZrO_(2)-N)was synthesized by the postgrafting method for the adsorption removal of typical metallic ions,phosphate and total oxidizable carbon from a real H_(2)O_(2)solution.ZrO_(2)-NH_(2),ZrO_(2)-NH and ZrO_(2)-N exhibited similar pore sizes and sequentially increased zeta potentials.The adsorption results of single and binary simulated solutions showed that the removal efficiency increased in the order of Fe^(3+)>Al^(3+)>Ca^(2+)>Na^(+).There is competitive adsorption between metallic ions,and Fe^(3+)has an advantage over the other metals,with a removal efficiency of 90.7%.The coexisting phosphate could promote the adsorption of metallic ions,while total oxidizable carbon had no effect on adsorption.The adsorption results of the real H_(2)O_(2)solution showed that ZrO_(2)-NH_(2)exhibited the best adsorption affinity for metallic ions,as did phosphate and total oxidizable carbon,with a total adsorption capacity of 120.9 mg·g_(-1).Density functional theory calculations revealed that the adsorption process of metallic ions involves electron transfer from N atoms to metals and the formation of N-metal bonds.

关键词： adsorption metallic ion phosphate total oxidizable carbon zirconia H_(2)O_(2)

SkillSim:voice apps similarity detection

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Cybersecurity 2023年第4期6卷 33-49页

作者： Zhixiu Guo Ruigang Liang guozhu meng Kai Chen SKLOIS Institute of Information EngineeringChinese Academy of SciencesBeijingChina School of Cyber Security University of Chinese Academy of SciencesBeijingChina

Virtual personal assistants(VPAs),such as Amazon Alexa and Google Assistant,are software agents designed to perform tasks or provide services to individuals in response to user commands.VPAs extend their functions through third-party voice apps,thereby attracting more users to use VPA-equipped products.Previous studies demonstrate vulnerabilities in the certification,installation,and usage of these third-party voice apps.However,these studies focus on individual apps.To the best of our knowledge,there is no prior research that explores the correlations among voice apps.Voice apps represent a new type of applications that interact with users mainly through a voice user interface instead of a graphical user interface,requiring a distinct approach to analysis.In this study,we present a novel voice app similarity analysis approach to analyze voice apps in the market from a new perspective.Our approach,called SkillSim,detects similarities among voice apps(i.***.skills)based on two dimensions:text similarity and structure similarity.SkillSim measures 30,000 voice apps in the Amazon skill market and reveals that more than 25.9%have at least one other skill with a text similarity greater than 70%.Our analysis identifies several factors that contribute to a high number of similar skills,including the assistant development platforms and their limited templates.Additionally,we observe interesting phenomena,such as developers or platforms creating multiple similar skills with different accounts for purposes such as advertising.Furthermore,we also find that some assistant development platforms develop multiple similar but non-compliant skills,such as requesting user privacy in a non-compliance way,which poses a security risk.Based on the similarity analysis results,we have a deeper understanding of voice apps in the mainstream market.

关键词： Voice app Similarity analysis Skills

The inconsistency of documentation:a study of online C standard library documents

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Cybersecurity 2022年第4期5卷 117-131页

作者： Ruishi Li Yunfei Yang Jinghua Liu Peiwei Hu guozhu meng KLois Institute oflnformation EngineeringChinese Academy of SciencesBejingChina School of Cyber Security University of Chinese Academy of SciencesBeijingChina.

The C standard libraries are basic function libraries standardized by the C language.Programmers usually refer to their APl documentation provided by third-party websites.Unfortunately,these documents are not necessarily complete or accurate,especially for constraint sentences of APl usage,which are called Security Specifications(SSs).SS issues can prevent programmers from following obligatory constraints,which results in APl misuse vulnerabilities.Previous work studying SS issues could only find certain types of inaccurate SSs through checking the compliance between APl usage and existing SSs.Therefore,we propose a novel approach SSeeker for quickly discovering missing and inaccurate SSs through the inconsistency of semantically similar SSs.More specifically,SSeeker first completes broken sentences and discovers SSs from them by judging their constraint sentiment.Then SSeeker puts semantically similar SSs from different sources into a group,which can be used to discover missing or inaccurate SSs.With the help of SSeeker,we investigated 4 popular online third-party C standard library documents,studied their conformity with the C99 standard,analyzed their APls and SSs,and discovered 92 prototype issues,15 web page issues,and 96 SS issues.

关键词： Documentation issues Security specification Standard library

Design and verification of an FPGA programmable logic element based on Sense-Switch pFLASH

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Frontiers of Information Technology & Electronic Engineering 2024年第4期25卷 485-499页

作者： Zhengzhou CAO guozhu LIU Yanfei ZHANG Yueer SHAN Yuting XU No.58 Research Institute China Electronics Technology Group CorporationWuxi 214035China

This paper proposes a kind of programmable logic element(PLE)based on Sense-Switch pFLASH technology.By programming Sense-Switch pFLASH,all three-bit look-up table(LUT3)functions,partial four-bit look-up table(LUT4)functions,latch functions,and d flip flop(DFF)with enable and reset functions can be realized.Because PLE uses a choice of operational logic(COOL)approach for the operation of logic functions,it allows any logic circuit to be implemented at any ratio of combinatorial logic to register.This intrinsic property makes it close to the basic application specific integrated circuit(ASIC)cell in terms of fine granularity,thus allowing ASIC-like cell-based mappers to apply all their optimization potential.By measuring Sense-Switch pFLASH and PLE circuits,the results show that the“on”state driving current of the Sense-Switch pFLASH is about 245.52μA,and that the“off”state leakage current is about 0.1 pA.The programmable function of PLE works normally.The delay of the typical combinatorial logic operation AND3 is 0.69 ns,and the delay of the sequential logic operation DFF is 0.65 ns,both of which meet the requirements of the design technical index.

关键词： Field programmable gate array(FPGA) Programmable logic element(PLE) Boolean logic operation Look-up table Sense-Switch pFLASH Threshold voltage

Are our clone detectors good enough?An empirical study of code effects by obfuscation

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Cybersecurity 2023年第4期6卷 163-181页

作者： Weihao Huang guozhu meng Chaoyang Lin Qiucun Yan Kai Chen Zhuo Ma SKLOIS Institute of Information EngineeringChinese Academy of SciencesBeijingChina School of Cyber Security University of Chinese Academy of SciencesBeijingChina Xidian University Xi’anChina

Clone detection has received much attention in many fields such as malicious code detection,vulnerability hunting,and code copyright infringement detection.However,cyber criminals may obfuscate code to impede violation detection.To date,few studies have investigated the robustness of clone detectors,especially in-fashion deep learning-based ones,against obfuscation.Meanwhile,most of these studies only measure the difference between one code snippet and its obfuscation version.However,in reality,the attackers may modify the original code before obfuscating it.Then what we should evaluate is the detection of obfuscated code from cloned code,not the original code.For this,we conduct a comprehensive study evaluating 3 popular deep-learning based clone detectors and 6 commonly used traditional ones.Regarding the data,we collect 6512 clone pairs of five types from the dataset BigCloneBench and obfuscate one program of each pair via 64 strategies of 6 state-of-art commercial obfuscators.We also collect 1424 non-clone pairs to evaluate the false positives.In sum,a benchmark of 524,148 code pairs(either clone or not)are generated,which are passed to clone detectors for evaluation.To automate the evaluation,we develop one uniform evaluation framework,integrating the clone detectors and obfuscators.The results bring us interesting findings on how obfuscation affects the performance of clone detection and what is the difference between traditional and deep learning-based clone detectors.In addition,we conduct manual code reviews to uncover the root cause of the phenomenon and give suggestions to users from different perspectives.

关键词： Clone detection Obfuscation Evaluation

Engineering oxygen vacancies on Tb-doped ceria supported Pt catalyst for hydrogen production through steam reforming of long-chain hydrocarbon fuels

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Chinese Journal of Chemical Engineering 2024年第4期68卷 181-192页

作者： Zhourong Xiao Changxuan Zhang Peng Li Desong Wang Xiangwen Zhang Li Wang Jijun Zou guozhu Li State Key Laboratory of Metastable Materials Science and Technology(MMST) Hebei Key Laboratory of Applied ChemistryCollege of Environmental and Chemical EngineeringYanshan UniversityQinhuangdao 066004China Key Laboratory for Green Chemical Technology of Ministry of Education School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China

Steam reforming of long-chain hydrocarbon fuels for hydrogen production has received great attention for thermal management of the hypersonic vehicle and fuel-cell application.In this work,Pt catalysts supported on CeO_(2)and Tb-doped CeO_(2)were prepared by a precipitation method.The physical structure and chemical properties of the as-prepared catalysts were characterized by powder X-ray diffraction,scanning electron microscopy,transmission electron microscopy,Raman spectroscopy,H_(2)temperature programmed reduction,and X-ray photoelectron spectroscopy.The results show that Tb-doped CeO_(2)supported Pt possesses abundant surface oxygen vacancies,good inhibition of ceria sintering,and strong metal-support interaction compared with CeO_(2)supported Pt.The catalytic performance of hydrogen production via steam reforming of long-chain hydrocarbon fuels(n-dodecane)was tested.Compared with 2Pt/CeO_(2),2Pt/Ce_(0.9)Tb_(0.1)O_(2),and 2Pt/Ce_(0.5)Tb_(0.5)O_(2),the 2Pt/Ce_(0.7)Tb_(0.3)O_(2)has higher activity and stability for hydrogen production,on which the conversion of n-dodecane was maintained at about 53.2%after 600 min reaction under 700℃at liquid space velocity of 9 ml·g^(-1)·h^(-1).2Pt/CeO_(2)rapidly deactivated,the conversion of n-dodecane was reduced to only 41.6%after 600 min.

关键词： Steam reforming n-Dodecane Hydrogen production Pt-based catalyst Oxygen vacancy CeO_(2)

ROR2 promotes invasion and chemoresistance of triple-negative breast cancer cells by activating PI3K/AKT/mTOR signaling

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Oncology Research 2024年第7期32卷 1209-1219页

作者： XIA DA HAN GE JUNFENG SHI CHUNHUA ZHU guozhu WANG YUAN FANG JIN XU Department of Breast and Thyroid Nanjing First HospitalNanjing Medical UniversityNanjingChina Department of General Surgery The First Affiliated Hospital of Nanjing Medical UniversityNanjingChina Department of Oncology Nanjing First HospitalNanjing Medical UniversityNanjingChina Department of Pathology Nanjing First HospitalNanjing Medical UniversityNanjingChina

Objective:This study aimed to investigate the role of receptor tyrosine kinase-like orphan receptor 2(ROR2)in triple-negative breast cancer(TNBC).Methods:ROR2 expression in primary TNBC and metastatic TNBC tissues was analyzed by immunohistochemical staining and PCR.ROR2 expression in TNBC cell lines was detected by PCR and Western blot analysis.The migration,invasion and chemosensitivity of TNBC cells with overexpression or knockdown of ROR2 were examined.Results:ROR2 expression was high in metastatic TNBC tissues.ROR2 knockdown suppressed the migration,invasion and chemoresistance of TNBC cells.ROR2 overexpression in MDA-MB-435 cells promoted the migration,invasion,and chemoresistance.Moreover,ROR2 knockdown in HC1599 and MDA-MB-435 adriamycin-resistant cells enhanced chemosensitivity to adriamycin.ROR2 could activate PI3K/AKT/mTOR signaling in TNBC cells.Conclusion:ROR2 is upregulated and promotes metastatic phenotypes of TNBC by activating PI3K/AKT/mTOR signaling.

关键词： Receptor tyrosine kinase-like orphan receptor 2 Triplet-negative breast cancer Proliferation Apoptosis PI3K/AKT/mTOR signaling Metastasis

DroidEcho:an in-depth dissection of malicious behaviors in Android applications

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Cybersecurity 2018年第1期1卷 126-142页

作者： guozhu meng Ruitao Feng Guangdong Bai Kai Chen Yang Liu SKLOIS Institute of Information EngineeringChinese Academy of SciencesBeijingChina Nanyang Technological University SingaporeSingapore Singapore Institute of Technology SingaporeSingapore School of Cyber Security University of Chinese Academy of SciencesBeijingChina

A precise representation for attacks can benefit the detection of malware in both accuracy and efficiency.However,it is still far from expectation to describe attacks precisely on the Android platform.In addition,new features on Android,such as communication mechanisms,introduce new challenges and difficulties for attack detection.In this paper,we propose abstract attack models to precisely capture the semantics of various Android attacks,which include the corresponding targets,involved behaviors as well as their execution dependency.Meanwhile,we construct a novel graph-based model called the inter-component communication graph(ICCG)to describe the internal control flows and inter-component communications of applications.The models take into account more communication channel with a maximized preservation of their program logics.With the guidance of the attack models,we propose a static searching approach to detect attacks hidden in ICCG.To reduce false positive rate,we introduce an additional dynamic confirmation step to check whether the detected attacks are false alarms.Experiments show that DROIDECHO can detect attacks in both benchmark and real-world applications effectively and efficiently with a precision of 89.5%.

关键词： Semantic attack model Android malware detection Inter-component communication graph Privacy leakage

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方以智生命观新探

世界宗教文化 2024年第1期 142-149页

作者：孙国柱中国政法大学人文学院

在中国文化语境里,生命与学问是统一的,明清之际著名学人方以智具有高度的代表性。方以智一生迭逢患难,经历生死考验,留下大量关于生命之学的论述。从方以智的人生履历、著作文本等出发深入探讨方以智生命观的具体内涵与融合方式,当能... 详细信息

在中国文化语境里,生命与学问是统一的,明清之际著名学人方以智具有高度的代表性。方以智一生迭逢患难,经历生死考验,留下大量关于生命之学的论述。从方以智的人生履历、著作文本等出发深入探讨方以智生命观的具体内涵与融合方式,当能够为刻画方以智的精神肖像提供更多富有价值的内容。方以智的生命观,创造性地融合了儒释道易诸家之学,具有丰富而深刻的内涵,在人类文明尤其需要共生互补的今天值得进一步思考和研究。

关键词：方以智生命观儒释道易融合

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著作权法中作品独创性的作品类型逻辑

法商研究 2024年第1期41卷 183-200页

作者：王国柱吉林大学理论法学研究中心吉林大学法学院

作品类型与作品独创性之间存在内在关联。作品类型是作品独创性的类型化呈现方式,作品独创性是生成作品类型的决定性因素。作品类型为阐明作品独创性提供必要场景,作品类型为描述作品独创性提供适格路径,是独创性抽象叙事的相对具体化... 详细信息

作品类型与作品独创性之间存在内在关联。作品类型是作品独创性的类型化呈现方式,作品独创性是生成作品类型的决定性因素。作品类型为阐明作品独创性提供必要场景,作品类型为描述作品独创性提供适格路径,是独创性抽象叙事的相对具体化。开放的作品类型体系是作品独创性逻辑延伸的结果,作品类型体系的开放性是作品独创性“主体性”特质和“创造性”特质的要求。法律示例的作品类型是作品独创性判定的辅助条件,示例的作品类型可以提示作品独创性判定的方向,提供差异化的独创性判定思路。应当以合乎作品独创性的展开逻辑为原则、以优化具体要素的配置为手段来改进著作权法中作品类型的示例方式。法律未示例的作品是作品独创性判定的适格对象。在适用“符合作品特征的其他智力成果”兜底条款时应当厘清未示例作品与示例作品类型之间的关系,以作品独创性判定的内在逻辑引领兜底条款的适用,以作品的领域限定要件作为作品独创性判定的前提,对“作品特征”进行全面考察。

关键词：作品独创性作品类型开放式兜底条款作品构成要件未示例作品