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Cross-architecture Binary Function Similarity Detection based on Composite Feature Model
( Xiaonan Li ),( Guimin Zhang ),( Qingbao Li ),( Ping Zhang ),( Zhifeng Chen ),( Jinjin Liu ),( Shudan Yue ) 한국인터넷정보학회 2023 KSII Transactions on Internet and Information Syst Vol.17 No.8
Recent studies have shown that the neural network-based binary code similarity detection technology performs well in vulnerability mining, plagiarism detection, and malicious code analysis. However, existing cross-architecture methods still suffer from insufficient feature characterization and low discrimination accuracy. To address these issues, this paper proposes a cross-architecture binary function similarity detection method based on composite feature model (SDCFM). Firstly, the binary function is converted into vector representation according to the proposed composite feature model, which is composed of instruction statistical features, control flow graph structural features, and application program interface calling behavioral features. Then, the composite features are embedded by the proposed hierarchical embedding network based on a graph neural network. In which, the block-level features and the function-level features are processed separately and finally fused into the embedding. In addition, to make the trained model more accurate and stable, our method utilizes the embeddings of predecessor nodes to modify the node embedding in the iterative updating process of the graph neural network. To assess the effectiveness of composite feature model, we contrast SDCFM with the state of art method on benchmark datasets. The experimental results show that SDCFM has good performance both on the area under the curve in the binary function similarity detection task and the vulnerable candidate function ranking in vulnerability search task.
Cross-Technology Localization: Leveraging Commodity WiFi to Localize Non-WiFi Device
( Dian Zhang ),( Rujun Zhang ),( Haizhou Guo ),( Peng Xiang ),( Xiaonan Guo ) 한국인터넷정보학회 2021 KSII Transactions on Internet and Information Syst Vol.15 No.11
Radio Frequency (RF)-based indoor localization technologies play significant roles in various Internet of Things (IoT) services (e.g., location-based service). Most such technologies require that all the devices comply with a specified technology (e.g., WiFi, ZigBee, and Bluetooth). However, this requirement limits its application scenarios in today's IoT context where multiple devices complied with different standards coexist in a shared environment. To bridge the gap, in this paper, we propose a cross-technology localization approach, which is able to localize target nodes using a different type of devices. Specifically, the proposed framework reuses the existing WiFi infrastructure without introducing additional cost to localize Non-WiFi device (i.e., ZigBee). The key idea is to leverage the interference between devices that share the same operating frequency (e.g., 2.4GHz). Such interference exhibits unique patterns that depend on the target device's location, thus it can be leveraged for cross-technology localization. The proposed framework uses Principal Components Analysis (PCA) to extract salient features of the received WiFi signals, and leverages Dynamic Time Warping (DTW), Gradient Boosting Regression Tree (GBRT) to improve the robustness of our system. We conduct experiments in real scenario and investigate the impact of different factors. Experimental results show that the average localization accuracy of our prototype can reach 1.54m, which demonstrates a promising direction of building cross-technology technologies to fulfill the needs of modern IoT context.
Optimum Conditions for Transformation of Synechocystis sp. PCC 6803
Xiaonan Zang,Bin Liu,Shunmei Liu,K.K.I.U. Arunakumara,Xuecheng Zhang 한국미생물학회 2007 The journal of microbiology Vol.45 No.3
This study was conducted to determine the optimal conditions for introduction of exogenous DNA into Synechocystis sp. PCC 6803. Of the three transformation techniques studied, electroporation, ultrasonic transformation and natural transformation, natural transformation showed the highest efficiency. Additionally, this study demonstrated that the higher plasmid concentration and longer homologous recombining fragments resulted in a greater number of transformants. For successful transformation, the lowest concentration of plasmid was 0.02 μg/ml, and the shortest homologous recombining fragment was 0.2 kb. Use of Synechocystis sp. PCC 6803 in the logarithmic growth phase resulted in two-fold higher transformation rate than that of the same organism when cells in the latent phase or the plateau phase were used for transformation. Pretreatment of the host strain, Synechocystis sp. PCC 6803, with EDTA (2 mM) for two days prior to transformation increased the transformation efficiency by 23%. Additionally, incubation of the cells and DNA for 5 h under light conditions increased the transformation efficiency by two orders of magnitude. Moreover, recovery treatment of the cells before they were plated onto antibiotic medium also increased the transformation efficiency.
Zhang Mengna,Chen Xiaoqin,Ruan Yongying,Jiang Shihong,Yang Jiaoxu,Jiang Minbao,Ruan Xiaonan,Li You 한국응용곤충학회 2020 Journal of Asia-Pacific Entomology Vol.23 No.2
The Australian tortoise beetle Trachymela sloanei (Coleoptera: Chrysomelidae: Chrysomelinae), an invasive pest of several species of Eucalyptus has been reported for the first time in Asia. It was first detected in Shenzhen, China where it has become established. Currently, T. sloanei is not a destructive forest pest in Shenzhen. Pupae and adults were frequently found infected by an unknown fungus.
Xiaonan Gao,Wei Tian,Zhenbin Zhang,Ralph Kennel 전력전자학회 2019 ICPE(ISPE)논문집 Vol.2019 No.5
Modular multilevel converters (MMCs) have become an attractive topology for medium-voltage motor drive applications due to their modular construction and voltage scalability. The main drawback of using MMC to drive motors is the large voltage variation of submodule (SM) capacitors when the motor is running at a low speed with a large load torque condition. Operating in the quasi two-level mode of MMCs is an effective solution for such a problem. The arm current commutation control is the most important part for the operation of MMCs in the quasi two-level mode. This paper proposes a new current commutation method. The general idea is to use the delay control method to realize the arm current commutation. Therefore, the key point is to decide when to delay the operation of a submodule at each step during the commutation process. In this paper, the model predictive control (MPC) method with extrapolation technique has been used to determine whether to delay the SM at the present moment. Therefore, the waveforms of the two arms in the same phase may not be completely complementary throughout the whole commutation period. Due to such non-complementary PWMs, the currents between two arms can be exchanged.
Xiaonan Fang,Lin-Bai Ye,Yijuan Zhang,Baozong Li,Shanshan Li,Lingbao Kong,Yuhua Wang,Hong Zheng,Wei Wang,Zhenghui Wu 한국미생물학회 2006 The journal of microbiology Vol.44 No.5
GST pull-down assays were used to characterize the SARS-CoV membrane (M) and nucleocapsid (N)interaction, and it was found that the amino acids 211-254 of N protein were essential for this interaction. When tetrad glutamines (Q) were replaced with glutamic acids (E) at positions of 240-243 of the N protein, the interaction was disrupted.
Optimum Conditions for Transformation of Synechocystis sp. PCC 6803
Zang, Xiaonan,Liu, Bin,Liu, Shunmei,Arunakumara, K.K.I.U.,Zhang, Xuecheng The Microbiological Society of Korea 2007 The journal of microbiology Vol.45 No.3
This study was conducted to determine the optimal conditions for introduction of exogenous DNA into Synechocystis sp. PCC 6803. Of the three transformation techniques studied, electroporation, ultrasonic transformation and natural transformation, natural transformation showed the highest efficiency. Additionally, this study demonstrated that the higher plasmid concentration and longer homologous recombining fragments resulted in a greater number of transformants. For successful transformation, the lowest concentration of plasmid was $0.02\;{\mu}g/ml$, and the shortest homologous recombining fragment was 0.2 kb. Use of Synechocystis sp. PCC 6803 in the logarithmic growth phase resulted in two-fold higher transformation rate than that of the same organism when cells in the latent phase or the plateau phase were used for transformation. Pretreatment of the host strain, Synechocystis sp. PCC 6803, with EDTA (2 mM) for two days prior to transformation increased the transformation efficiency by 23%. Additionally, incubation of the cells and DNA for 5 h under light conditions increased the transformation efficiency by two orders of magnitude. Moreover, recovery treatment of the cells before they were plated onto antibiotic medium also increased the transformation efficiency.
Fang, Xiaonan,Ye, Lin-Bai,Zhang, Yijuan,Li, Baozong,Li, Shanshan,Kong, Lingbao,Wang, Yuhua,Zheng, Hong,Wang, Wei,Wu, Zhenghui The Microbiological Society of Korea 2006 The journal of microbiology Vol.44 No.5
GST pull-down assays were used to characterize the SARS-CoV membrane (M) and nucleocapsid (N) interaction, and it was found that the amino acids 211-254 of N protein were essential for this interaction. When tetrad glutamines (Q) were replaced with glutamic acids (E) at positions of 240-243 of the N protein, the interaction was disrupted.
?元(Zhang, Yuan),?波(Tu, Bo),洪?楠(Hong, Xiaonan) 동북아시아문화학회 2018 동북아 문화연구 Vol.1 No.55
At present,there are various development dilemmas in China’s Network Society. Fragmentation of information and individualization can easily lead to lack of the life’s meaning,elimination of human culture can easily cause expansion of instrumental rationality and humanistic value decline. De-centration leads to cultural diversity, multiple values, information sharing, it also leads to prevailing relative moral relativism and immoralism, not to say autism and money worship. Based on existing research, this paper started from the analysis and solve the current social development dilemma of Chinese network governance problems, used the theory of “cooperative governance”,and put forward a corresponding diversified mechanism of the collaborative governance. This paper emphasized the cooperative governance roles of government, network service providers, network media industry & practitioners, and network society users. And the conclusions are firstly, strengthen government’s authoritative role and use advanced technologies to assure network safety and monitor network communication contents; secondly, optimize advanced network management workforce to improve the network public opinion supervision, emergency response and control mechanism, also complete network society’s legislative mechanism and establish proper law systems. Thirdly, unite the cooperation of government, network service providers, practitioners and network users to renovate false news, standardize network communication rules, and filter vulgar and other undue contents, also to enhance the industry and individuals’ self-discipline mechanism, professional ethics and professional skills.