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Research of Automatic Recognition Double Layers Intrusion Intention Algorithm Based on Attack Graph
Wang Guangze,Wang Peng,Luo Zhiyong,Zhu Suxia 보안공학연구지원센터 2016 International Journal of Security and Its Applicat Vol.10 No.3
The determination of network equipment weaknesses and the discovery of intrusion intention is one of the difficulties that troubled network security management personnel. Based on previous studies, further proposed a double attack graph based on domain-equipment. By the underlying network topology data collected and analyzed, using Bayesian theory to complete the quantify for the double attack graph and generation strategy in minimal power key set, with the cost of calculation of key equipment in the automatic recognition network topology, we provide an important basis for network maintenance. Experimental results show that the measure of using quantitative domain-equipment double attack graph to recognize the intrusion intention is not only effective and feasible, but also has the feature of easy promotion.
Polyetheretherketone implants with hierarchical porous structure for boosted osseointegration
Zhiyong Chen,Yu Chen,Yang Wang,JiaJia Deng,Xin Wang,Qingqing Wang,Yuehua Liu,Jiandong Ding,Lin Yu 한국생체재료학회 2023 생체재료학회지 Vol.27 No.00
Background Good osseointegration is the key to the long-term stability of bone implants. Thermoplastic polyetheretherketone (PEEK) has been widely used in orthopedics; however, its inherent biological inertia causes fibrous tissue to wrap its surface, which leads to poor osseointegration and thus greatly limits its clinical applications. Methods Herein, we developed a facile yet effective surface modification strategy. A commonly used sulfonation coupled with “cold pressing” treatment in the presence of porogenic agent formed a three-dimensional hierarchical porous structure on PEEK surface. Subsequently, the effects of porous surface on the in vitro adhesion, proliferation and differentiation of rat bone marrow-derived mesenchymal stem cells (BMSCs) were evaluated. Finally, the osteoinduction and osseointegration of surface-porous PEEK implant were examined in the rat distal femoral defect model. Results In vitro results showed that the surface modification did not significantly affect the mechanical performance and cytocompatibility of PEEK substance, and the porous structure on the modified PEEK substrate provided space for cellular ingrowth and enhanced osteogenic differentiation and mineralization of BMSCs. In vivo tests demonstrated that the surface-porous PEEK implant could effectively promote new bone formation and had higher bone-implant contact rate, thereby achieving good bone integration with the surrounding host bone. In addition, this modification technique was also successfully demonstrated on a medical PEEK interbody fusion cage. Conclusion The present study indicates that topological morphology plays a pivotal role in determining implant osseointegration and this facile and effective modification strategy developed by us is expected to achieve practical applications quickly.
( Zhiyong Liu ),( Yinghua Wang ),( Lizhong Song ),( Yinyin Wang ),( Fusheng Dai ) 한국인터넷정보학회 2018 KSII Transactions on Internet and Information Syst Vol.12 No.1
In this paper, we propose a joint adaptive combining and variable tap-length multiuser detector (MUD) for amplify-and-forward (AF) underwater acoustic cooperative interleave-division multiple access (IDMA) communication system. The proposed MUD jointly realizes tap-length adjustment, adaptive combining, and multiuser detection. In contrast to the existing methods, the proposed detector can adaptively combine the received signals from different nodes at destination, and does not need the assumption that full and perfect channel state information (CSI) of all the links at the receiver is known. Moreover, the proposed detector can adaptively adjust the tap coefficient vector and tap-length of each branch according to the specific channel profile of each branch. Simulation results validate the feasibility and show the advantages of the proposed detector against existing counterparts.
Zhiyong Wang(왕지용) 한국체육과학회 2023 한국체육과학회지 Vol.32 No.6
Purpose: The purpose of this study is to provide useful information to Chinese baseball marketing by applying big data analysis technology in the field of baseball. Method: Based on this, Data analysis periods were selected from the years 2008,2014 and 2022, big data tool “Textom” was used to collect keywords related to Baseball+Beijing Olympics, Baseball+Asian game, and Baseball+WBC on popular websites. The keywords were collected to examine the relevance and clustering of major keywords related to Chinese baseball. The collected keywords were analyzed using data cleaning and matrix analysis. In order to visualize the quantified data, we used the NetDraw function of Ucinet 6.0 to visualize the network of words related to Chinese baseball. Results: First, the results of the frequency analysis of the resulting words based on keywords, 2008 Sports, Niche, Beijng Olympic, 2014 Baseball, Sports, Game, 2022 Baseball, Policy, Support. Second, the result of conducting Matrix analysis by collecting the result words that appeared specifically based on keywords, 2008 Players, League, Market, 2014 Government, Support, Policy, Rules, Elementary, 2022 Challenge, Cooperation, Management, Financial, and Directions. Conclusion: Based on the results of this study, the development of Chinese baseball was identified through keywords for 3 years. Therefore, Chinese baseballs development first has to be supported by the Chinese governments policy, because the sport in China is developed under the national system. Afterward, strengthen policy support in baseball, increase financial investment, enhance talent training, and strengthen international cooperation to promote the rapid development of baseball in China, furthermore accelerate the rise of baseball marketing in China.
Effect of High-Energy Electro-Pulses on the Compression Deformation Behavior of Ti-6Al-4V Alloy
Zhiyong Zhao,Hongliang Hou,Ning Zhang,Yanling Zhang,Yaoqi Wang,Guofeng Wang 대한금속·재료학회 2016 METALS AND MATERIALS International Vol.22 No.4
Compression tests of Ti–6Al–4V alloy were conducted using an electron universal testing machine with discharge voltages that range from 50 V to 70 V and strain rate of 0.01 s −1 . Isothermal compression at equivalent temperatures was also performed on a universal testing machine with furnace, with the same strain rate. Results show that the deformability of Ti–6Al–4V alloy can be significantly improved by high-energy electro-pulses, and the deformation resistance and yield stress were also decreased. Moreover, the effect of high-energy electropulses on compression mechanical properties of Ti–6Al–4V alloy increased with increasing discharge voltage. However, elongation and deformation resistance of compressions with high-energy electro-pulses were higher than isothermal compressions at equivalent temperatures. This result proved that the deformability improvement of Ti–6Al–4V alloy by high-energy electro-pulses results from the joint effects of temperature and electro-plasticity. Fracture modes in different experimental conditions were analyzed by observing the fracture morphologies of specimens by using a scanning electron microscope. Under high-energy electro-pulses, the micro morphology of compression fracture changes from elongated oval to equiaxed dimples, and the fracture modes transfer from intergranular to transgranular fracture.
Transfer Model Based on State of Finite Semi-Markov Automata Intrusion Tolerance
Wang Guangze,Wang Peng,Luo Zhiyong,Zhu Suxia 보안공학연구지원센터 2016 International Journal of Security and Its Applicat Vol.10 No.3
Existing network security technology may not against most of intrusion so that we need to study intrusion tolerance technology. On the basis of existing model of intrusion tolerance, we putted forward an optimization of finite automata state transition model in intrusion tolerance system by adding strategy and updating status. Since the conversion process between the states of the model meets Semi-Markov theory, therefore, the model can be used to quantify this theory; it gives calculation process of the steady probability by each state. By stabilizing the probabilistic analysis of each state, provide theoretical guidance and basis for network management personnel to better maintain network security .Proven, the Semi-Markov applied to finite automata intrusion tolerant system is feasible, effective, and has simple features.
Yixi Wang,Hao Wang,Huili Peng,Zhicun Wang,Jianning Wu,Zhiyong Liu 한국섬유공학회 2018 Fibers and polymers Vol.19 No.2
A novel eco-friendly porous adsorbent of cellulose (CE)/chitosan (CS) aerogel was prepared through sol-gel process and freeze-drying to remove Congo Red (CR). A series of aerogels were prepared by adjusting the mass ratios of CE and CS. Composite aerogels were characterized by Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), and X-ray diffraction (XRD). SEM images showed that it was possible to change the structure of the aerogel by adjusting the amount of chitosan. The effects of dosage of chitosan, initial pH, temperature, adsorbent dosage, contact time, and initial dye concentration on adsorption capacities for CR were studied in detail. Batch adsorption studies showed that aerogel exhibited maximum removal efficiency to CR at a composite ratio of 1:3 and dosage of 2.5 g/l. CE/CS aerogel had excellent adsorption capacities for CR at a pH range of 3-11, which indicated stability of the aerogel in both acidic and alkaline conditions. CR adsorption on the composite aerogel fitted pseudo-second-order kinetics and Langmuir isotherm. The Langmuir isotherm model revealed that the maximum theoretical adsorption capacity of this material for CR was 381.7 mg/g at pH 7.0 at 303 K for 24 h. The adsorption mechanism included electrostatic and chemical interactions. The results indicated that the adsorption capacity of CE/CS aerogels was higher than the other chitosan composites adsorbents.