Evaluation of the Suitability of Urban Parks in Tangshan Hebei China

ZiXiang Wang,김기수 사단법인 한국융합기술연구학회 2024 아시아태평양융합연구교류논문지 Vol.10 No.3

In recent years, the dramatic expansion of urban scale and the high intensity of transportation activities have brought about many social problems, and the contradiction between urbanization and the natural ecology and humanistic environment has been increasing, triggering land-use conflicts, which makes the original natural landscape areas altered and the balance of the ecosystem threatened. In this study, the South Lake Park in Tangshan, Hebei Province, is used as an example to evaluate the suitability of the park using the hierarchical analysis method (AHP). Several key influencing factors were considered in the study, including natural landscape, cultural features, infrastructure, environmental protection, accessibility and management quality. The results of the study show that South Lake Park has advantages in terms of natural landscape and cultural features, but there is room for improvement in terms of infrastructure maintenance, environmental protection measures and accessibility. The overall evaluation score of the park accessibility is 3.4, the landscape is 3.95, the overall score of uniqueness is 3.8, the infrastructure is 2.96, and the management service is 3.04. Based on the scores, three targeted optimization strategies are proposed for the appropriateness of the South Lake Park in Tangshan City. The first is to improve the organization and design of slow-moving traffic, the second is to improve the concept of landscape design, and the third is to propose the improvement of the park's management services, the timely maintenance of various facilities in the park, and the training of service personnel's attitudes. This study not only provides a scientific assessment method for the planning and construction of urban parks in Tangshan City, but also provides some lessons and references for other cities on similar issues. In the process of urbanization, scientific and reasonable urban park planning is of great significance in realizing the sustainable development of cities and improving the quality of life of residents.

Research on the Defense Method of Vtable Hijacking

Wang Zixiang,Shan Chun,Xue Jingfeng,Sun Shiyouhu Changzhen 보안공학연구지원센터 2016 International Journal of Security and Its Applicat Vol.10 No.11

Memory corruption vulnerability is an oldest type of vulnerabilities in software vulnerabilities. Attackers typically use a technique called virtual function table hijacking to exploit memory corruption vulnerability. In this paper, we propose a defense method which extracting virtual function tables and virtual function call related location information from the binary program. Then instrumenting identifier on vtables or backuping the vtables’ pointers to detect vtables’ integrity. Finally, the defense method is verified by Firefox, Chrome, IE browsers. Experiments show that the method can fully and effectively defend the real-world virtual function table hijacking attack with the small performance overhead and good compatibility.

An improved YOLOX approach for low-light and small object detection: PPE on tunnel construction sites

Wang Zijian,Cai Zixiang,Wu Yiming 한국CDE학회 2023 Journal of computational design and engineering Vol.10 No.3

Tunnel construction sites pose a significant safety risk to workers due to the low-light conditions that can affect visibility and lead to accidents. Therefore, identifying personal protective equipment (PPE) is critical to prevent injuries and fatalities. A few researches have addressed the challenges posed by tunnel construction sites whose light conditions are lower and images are captured from a distance. In this study, we proposed an improved YOLOX approach and a new dataset for detecting low-light and small PPE. We modified the YOLOX architecture by adding ConvNeXt modules to the backbone for deep feature extraction and introducing the fourth YOLOX head for enhancing multiscale prediction. Additionally, we adopted the CLAHE algorithm for augmenting low-light images after comparing it with eight other methods. Consequently, the improved YOLOX approach achieves a mean average precision of 86.94%, which is 4.23% higher than the original model and outperforms selected state-of-the-art. It also improves the average precision of small object classes by 7.17% on average and attains a real-time processing speed of 22 FPS (Frames Per Second). Furthermore, we constructed a novel dataset with 8285 low-light instances and 6814 small ones. The improved YOLOX approach offers accurate and efficient detection performance, which can reduce safety incidents on tunnel construction sites.

Understanding User Needs for Creative Marine Culture Products: A Grounded Theory Approach

기육철,ZiXiang Wang,이승헌,박승태 사단법인 한국융합기술연구학회 2023 아시아태평양융합연구교류논문지 Vol.9 No.11

Cultural and creative products speak about culture, history, and a country’s identity. Under the consumption mode of the new era, designers can create excellent cultural and creative products only by accurately grasping the consumers' demand for the value of the products. This study aimed to explore the issues and expectations within maritime cultural creative product. Grounded theory was used to conduct user interviews. A three-level coding method to code, analyze and construct logical relationships for the interview texts according to the principles of grounded theory was also used. In-depth analysis of the demand value of local consumers was conducted to explore the design path of marine cultural creative products, to improve the effective docking of supply and demand in the product market. The study results showed that users' needs for marine cultural creative products mainly include nine core concepts (aesthetic value, display value, aesthetic taste, cultural impression, memory empathy, utility value, individual needs, performance value, and service value.) and functional value. Moreover, cultural and creative products designed on the basis of this research can gain a competitive advantage in the market, enhance the vitality of the surrounding marine cultural and creative market, and play a vital role in the inheritance, protection and development of marine culture. In future research, integrating scientific quantitative methods can aid in making experimental data more precise.

Size-Dependent Thermodynamic Properties of the Reaction of Nano-ZnO with Benzoic Acid

Shuting Wang,Zixiang Cui,Yongqiang Xue 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2015 NANO Vol.10 No.7

Studying the thermodynamic properties of the reaction of nanoparticle with organic substance is significant for the application of nanomaterial in organic fields. In this work, by using the reaction of nano-ZnO with different particle sizes with benzoic acid as a research system, the size-dependent standard equilibrium constant and reaction thermodynamic properties were analyzed theoretically, and the influence regularities of the particle size on the standard equilibrium constant and the reaction thermodynamic properties were studied. The excellent agreement between the experimental results and theoretical analysis shows that the particle size has remarkable influence on the standard equilibrium constant and the thermodynamic properties of the reaction; with the decrease of the particle size, the standard equilibrium constant increases, while the standard molar reaction Gibbs energy, the standard molar reaction enthalpy and the standard molar reaction entropy decrease. Furthermore, the logarithm of the standard equilibrium constant and the thermodynamic properties present linear relations with the reciprocal of the particle diameter, respectively. The theory and the influence regularities will provide useful tools to lead better and broader application of nanomaterial in organic fields.

The Size Dependence of Dissolution Thermodynamics of Nanoparticles

Zhi-Qiang Wang,Yongqiang Xue,Zixiang Cui,Huijuan Duan,Xiao-Yan Xia 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2016 NANO Vol.11 No.9

Dissolution of nanoparticles is involved in the preparation, research and application of nanomaterials, but there is a surprising difference in dissolution thermodynamics between nanoparticles and the corresponding bulk materials. In the paper, the relations of dissolution thermodynamic properties, equilibrium constant of nanoparticles, respectively, and particle size were derived by introducing interface variables and the surface chemical potential. Experimentally, the solubility of nano-barium sulfate with different average particle sizes at different temperatures were determined by the method of electrical conductivity, obtaining the influencing regularities of particle size on the dissolution thermodynamic properties and the equilibrium constant. The regularities are in accordance with the theory. The results show that there are remarkable effects of particle size of nanoparticles on the dissolution thermodynamic properties and the equilibrium constant; with the decreasing of the size of nanoparticles, the dissolution equilibrium constant increases, while the standard dissolution Gibbs free energy, the standard dissolution enthalpy and the standard dissolution entropy decrease; and the logarithm of the dissolution equilibrium constant, the standard dissolution Gibbs free energy, the standard dissolution enthalpy and the standard dissolution entropy are linearly associated with the reciprocal of particle size, respectively. This new theory provides a quantitative description of nanoparticles dissolution behavior, and has important scientific significance for understanding and predicting of thermodynamic regularity of dissolution concerned in the preparation, researches and applications of nanomaterials.

Incorporating additive manufacturing constraints into magneto-structural topology optimization

Bai Yingchun,Cai Jiale,Wang Zixiang,Li Siqi 한국CDE학회 2022 Journal of computational design and engineering Vol.9 No.5

The sequential using of topology optimization and AM (additive manufacturing) can generate and fabricate superior-performance yet lightweight magneto-structural components. In this paper, a magneto-structural topology optimization method is proposed considering AM constraints to improve the design manufacturability of optimized designs. The design problem is formulated with the weighted combination of magnetic compliance and mechanical compliance as a single objective subjected to two types of manufacturing constraints and the volume fraction constraint. Two important AM constraints are in a sequential manner incorporated into the topology optimization model, in which the overhang angle constraint is followed by the maximum length scale constraint. Corresponding sensitivities of the objective and constraints are derived, and the optimization problem is solved by the method of moving asymptotes. Two numerical examples and a practical conceptual design of linear motor rotor structure are systematically investigated to demonstrate the effectiveness of the proposed method.

Fuzzy Evaluation Analysis of Surprise Elements in User Experience Design

기육철(YuZhe Qi),왕재향(ZiXiang Wang),김기수(KieSu Kim) 한국디자인리서치학회 2024 한국디자인리서치 Vol.9 No.1

Resource Allocation and Distributed Uplink Offloading Mechanism in Fog Environment

Linna Ruan,Zhoubin Liu,Xuesong Qiu,Zixiang Wang,Shaoyong Guo,Feng Qi 한국통신학회 2018 Journal of communications and networks Vol.20 No.3

Applying fog computing technology to the shared patternhas two problems to cope with. One is to formulate a rational mechanismfor resource allocation, and the other is to design computationoffloading strategy of tasks based on resource allocation result. For solving these problems, we construct a three-layer F-RAN architecturefirst, which consists of terminal layer, access layer andnetwork layer. Second, we adopt differential game and bipartitegraph multiple matching algorithm to solve bandwidth resource allocationproblemof fog node (FN)-access point (AP) and AP-sharedterminal (ST), respectively. Third, Lyapunov theory and proposeddeviation update decision algorithm (DUDA) are used to solve computationoffloading decision-making and offloading update ordermaking. At last, simulation results show that our strategy can save30%-60% system consumption, and the resource demand satisfactionrate can be guaranteed to reach 80% or more.

Resource Allocation and Distributed Uplink Offloading Mechanism in Fog Environment

Ruan, Linna,Liu, Zhoubin,Qiu, Xuesong,Wang, Zixiang,Guo, Shaoyong,Qi, Feng The Korean Institute of Communications and Informa 2018 Journal of communications and networks Vol.20 No.3

Applying fog computing technology to the shared pattern has two problems to cope with. One is to formulate a rational mechanism for resource allocation, and the other is to design computation offloading strategy of tasks based on resource allocation result. For solving these problems, we construct a three-layer F-RAN architecture first, which consists of terminal layer, access layer and network layer. Second, we adopt differential game and bipartite graph multiple matching algorithm to solve bandwidth resource allocation problem of fog node (FN)-access point (AP) and AP-shared terminal (ST), respectively. Third, Lyapunov theory and proposed deviation update decision algorithm (DUDA) are used to solve computation offloading decision-making and offloading update order-making. At last, simulation results show that our strategy can save 30%-60% system consumption, and the resource demand satisfaction rate can be guaranteed to reach 80% or more.