The Influence Mechanism of Different Cash Flow Availability on R&D Investment: Evidence from China by Xiaobo Wu, Ye Hua, Hao Lu

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Defense mechanism of SDN application layer against DDoS attack based on API call management by Yang WANG, Guangming TANG, Shuo WANG, Jiang CHU

“…Due to thelack of strict access control, identity authentication and abnormal call detection, attackers may develop malicious applications easily and then it leads to theabuse of the northbound interface API (application programming interface) accordingly.There are mainly two patterns of DDoS (distributed denial-of-service) attacks against application layer.1) malicious App bypass the security review of the northbound interface and make a large number of calls to some API in a short time, thus causing the controller to crash and paralyzing the whole network; 2) attackers take a legitimate SDN (software defined network) application as the target and make a large number of short-time calls to the specific API needed by the application, which makes the legitimate App unable to call the API normally.Compared with the first pattern, the second one is more subtle.Therefore, it’s necessary to distinguish whether the App is malicious or not, effectively clean the App running on the attacked controller, and redistribute the controller to the legitimate App.Based on the in-depth analysis of the development trend of the current northbound interface, the possible DDoS attack patterns were simulated and practiced.Then a DDoS defense mechanism for SDN application layer was proposed.This mechanism added an App management layer between SDN application layer and control layer.Through reputation management, initial review, mapping allocation, anomaly detection and identification migration of the App, the malicious App attack on SDN can be predicted and resisted.The proposal focused on pre-examination of malicious App before attacks occur, so as to avoid attacks.If the attack has already happened, the operation of cleaning and separating the legitimate App from the malicious App is triggered.Theoretical and experimental results show that the proposed mechanism can effectively avoid DDoS attacks in SDN application layer, and the algorithm runs efficiently.…”
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Physical and mechanical properties of composites produced from recycled polypropylene and cardboard-polyethylene-aluminium mixture by Bekir Cihad Bal, Nasır Narlioğlu

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Experimental Investigation on the Correlation between Dynamic Ultrasonic and Mechanical Properties of Sandstone Subjected to Uniaxial Compression by Yunjiang Sun, Jianping Zuo, Yue Shi, Zhengdai Li, Changning Mi, Jinhao Wen

“…This paper investigates the correlation between dynamic ultrasonic and mechanical properties of sandstones with different buried depths subjected to uniaxial compression tests. …”
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Effect of ultrasonic radiation on the organization and mechanical properties of laser-melted Ni-based WC coatings by Changlong Zhao, Weilong Du, Zice Yu, Zihao Zhang, Haifeng Zhang

“…Secondly, the effect of the ultrasonic radiation process on the mechanical properties of the coating was analyzed by comparative experiments. …”
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Nonlinear Vibration Mechanism of the Marine Rotating Machinery with Airbag Isolation Device under Heaving Motion by Xiaolei Du, Ming Li

“…In this paper, we put an investigation into the nonlinear vibration mechanism of the marine rotating machinery with an airbag isolation device under heaving motion. …”
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A Review of Geotourism and Geoparks: Is Africa missing out on this new mechanism for the development of sustainable tourism? by Percy Mabvuto Ngwira

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Interpersonal relationships as coping mechanisms during bed rest: a thematic synthesis literature review by Ana Cikač, Ana Cikač, Saša Pišot

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Investigation on Mechanical and Thermal Properties of a Kenaf/Jute Fiber-Reinforced Polyester Hybrid Biocomposite by Munirah D. Albaqami, Yagya Dutta Dwivedi, N. Krishnamoorthy, M. Logesh Kumar, L. H. Manjunatha, Ch. Mallika Chowdary, Saikh Mohammad Wabaidur, A. Rajendra. Prasad, Rupesh V. Chikhale, S. Praveen Kumar

“…This study investigates the mechanical and thermal properties of biocomposite in relation to their hybridization. …”
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Case Study on Incentive Mechanism of Energy Efficiency Retrofit in Coal-Fueled Power Plant in China by Donghai Yuan, Xujing Guo, Yuan Cao, Liansheng He, Jinggang Wang, Beidou Xi, Junqi Li, Wenlin Ma, Mingshun Zhang

“…Design of incentive mechanism will help these low efficiency enterprises improve efficiency and reduce CO2 emissions, which can provide the power plants sufficient incentive to implement energy efficiency retrofit project in existing coal-fuel power generation-units, and we hope it will make a good demonstration for the other low efficiency coal-fueled power generation units in China.…”
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New Insights Into the Reservoir Landslide Deformation Mechanism From InSAR and Numerical Simulation Technology by Guoshi Liu, Bin Wang, Qian Sun, Jun Hu, Lei-Lei Liu, Wanji Zheng, Liye Zou

Subjects: “…Deformation mechanism…”
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Study on Water Transport Mechanisms of the PEMFC Based on a Visualization Platform and Water Balance Model by Xin Zhao, Ruidi Wang, Yanyi Zhang, Dong Hao, Zirong Yang

“…In the presented paper, the visualization platform of the single fuel cell and the water balance model were built to investigate the water transport mechanisms. A transparent 25 cm2 single fuel cell with serpentine flow channels was adopted. …”
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Stability Mechanism and Control Factors on Equipment Removal Area under “Goaf-Roof-Coal” Structure by Zhongshun Chen, Yong Yuan, Cheng Zhu, Wenmiao Wang

“…The field observation confirms that the proposed stability mechanism and control measures are effective under GRC structure.…”
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Grain refinement and improved mechanical properties of as-cast Mg-3Gd alloy by Zr addition by Mohammadreza Maghzi, Hamed Mirzadeh, Reza Mahmudi

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Deformation behavior and fracture mechanism of magnesium foil under low-temperature on-line heating rolling by Qiuyan Shen, Peng Zhang, Yi Liu, Yongxing Ba, Jiangfeng Song, Bin Jiang

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Analysis of Vertical Load Transfer Mechanism of Assembled Lattice Diaphragm Wall in Collapsible Loess Area by Mingtan Xia, Xudong Zhang, Gengshe Yang, Liu Hui, Wanjun Ye

“…The vertical bearing mechanism of the lattice diaphragm wall in the loess area is investigated. …”
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Structural Design and Mechanical Analysis of Permanent Magnet Wheeled Climbing Robots on an Outer Wall of Pipelines by Li Haonan, Hou Yu, Jiang Yiwei, Sun Wei

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Catastrophe Mechanism of Stress-Fissure Coupling Field in Mining Close Distance Seams in Southwest China by Suo Jie, Li Zhen-hua, Huang Cun-han, Cao Zheng-zheng, Xu You-lin, Chen Zu-guo

“…For the sake of studying the catastrophe mechanism of stress-fissure coupling field in mining close distance seams in southwest China, a test working face in Guizhou province in southwest China is adopted and researched by the methods of numerical calculation and similar experiment. …”
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Exploring the Gating Mechanism of the Human Copper Transporter, hCtr1, Using EPR Spectroscopy by Shahaf Peleg, Shelly Meron, Yulia Shenberger, Lukas Hofmann, Lada Gevorkyan-Airapetov, Sharon Ruthstein

“…While structural details of the transmembrane domain of human Ctr1 have been elucidated using X-ray crystallography and cryo-EM, the transfer mechanisms of copper and the conformational changes that control the gating mechanism remain poorly understood. …”
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Analyzing Vibration Mechanism of Angular Contact Ball Bearing with Compound Faults on Inner and Outer Rings by Lihai Chen, Ma Fang, Ming Qiu, Yanfang Dong, Xiaoxu Pang, Junxing Li, Chuanmeng Yang

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