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Crustal attenuation characteristics of S-waves beneath the Eastern Tohoku region,Japan

Earthquake Science 2016年第5期29卷 259-269页

作者： Muhammad adeel arshad Department of Civil Engineering University of Engineering & TechnologyPeshawar

An inversion method was applied to crustal earthquakes dataset to find S-wave attenuation characteristics beneath the Eastern Tohoku region of Japan. Accelerograms from 85 shallow crustal earthquakes up to 25 km depth and magnitude range between 3.5 and 5.5 were analyzed to estimate the seismic quality factor Qs. A homogeneous attenuation model Qs for the wave propagation path was evaluated from spectral amplitudes, at 24 different frequencies between 0.5 and 20 Hz by using generalized inversion technique. To do this, non-parametric attenuation functions were calculated to observe spectral amplitude decay with hypocentral distance. Then, these functions were parameterized to estimate Qs. It was found that in Eastern Tohoku region, the Qs frequency dependence can be approximated with the function 33 f 1.22 within a frequency range between 0.5 and 20 Hz. However, the frequency dependence of Qs in the frequency range between 0.5 and 6 Hz is best approximated by Qs （f） = 36 f 0.94 showing relatively weaker frequency dependence as compared to the relation Qs （f） = 6 f^ 2.09 for the frequency range between 6 and 15 Hz. These results could be used to estimate source and site parameters for seismic hazard assessment in the region.

关键词： Tohoku Generalized inversion technique Non-parametric attenuation function Seismic quality factor S-wave

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Magnetic Field-induced Enhancement of Phase Change Heat Transfer via Biomimetic Porous Structure for Solar-thermal Energy Storage

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Journal of Bionic Engineering 2021年第5期18卷 1215-1224页

作者： Juan Li Zhangyu Zhu adeel arshad Shuai Zhang Lei Shi Yuying Yan School of Mechanical and Electrical Engineering Nanjing Forestry UniversityNanjing 210037People's Republic of China Fluids and Thermal Engineering Research Group Faculty of EngineeringUniversity of NottinghamNottingham NG72RDUK School of Energy Science and Engineering Harbin Institute of TechnologyHarbin 150001People's Republic of China

Multifunctional phase change composites are in great demand for all kinds of industrial technologies and applications,which have both superior latent heat capacity and excellent solar-thermal conversion *** this research,biomimetic phase change composites are made by inspired by natural systems,successfully getting the high thermal conductivity of carbon foam and magnetism of composites together,to establish a novel solar-thermal energy storage *** morphology and the thermal characteristics of biomimetic phase change composites have been *** results showed that the maximum storage efficiency of the biomimetic phase change materials increased by 56.3%compared to that of the based materials,and it can further be improved by the application of magnetic *** the heat transfer process of solarthermal conversion and energy storage in biomimetic porous structure under the external physical fields has been explained by ***,the magnetic field-induced method applied in this research has better solar-thermal energy storage characteristics within a porous structure by dynamically controlling the magnetism,which has potential uses for various sustainable applications,including waste-heat recovery,energy conservation in building,and solar-thermal energy storage.

关键词： Bionic porous structure Solar-thermal conversion Thermal energy storage Phase change materials Magnetic nanoparticles

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Distributed Renewable Energy under the Guidance of Price Autonomous Operation Technology

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Smart Grid and Renewable Energy 2017年第10期8卷 305-324页

作者： Arslan Habib adeel arshad Rafiq Khan School of Automation Northwestern Polytechnical University Xi’an China Fluids & Thermal Engineering (FLUTE) Research Group University of Nottingham UK School of Electrical Engineering Xi’an Jiaotong University Xi’an China

Penetration of Distributed Renewable Energy in active distribution network has increased year by year, and the distributed characteristics of active distribution network has become increasingly prominent;it is difficult for traditional centralized energy scheduling to solve the coordination of random output of distributed energy and the communication pressure of a large number of distributed data. In this paper, we propose a Distributed Renewable Energy Coordination Strategy based on price guidance, through hierarchical multi-agent model. The coordination model of each agent is introduced in detail, regional target, price coordination response strategy and regional security constraints, using Agent’s Distributed Autonomy and Global Collaboration to realize the Energy Balance of Active Distribution Network and promote the Storage of Distributed Renewable Energy;the coordination strategy focuses on the impact of price adjustment on energy storage and flexible load response capacity to improve the distributed renewable energy consumption. Finally, through the quantitative analysis of the comprehensive performance of the index, the evaluation results of the traditional sequential simulation method are compared, and the rationality and validity of the proposed method are verified.

关键词： Evaluation Index Multi Agent Distributed Renewable Energy Price Coordination

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Diagnostic Utility of Sago-Like Nodules on Gross Thoracoscopic Appearance in Tuberculous Pleural Effusion and Their Correlation with Final Histo-Microbiologic Findings

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Journal of Tuberculosis Research 2018年第4期6卷 270-280页

作者： Merlin Thomas Wanis H. Ibrahim Tasleem Raza Kamran Mushtaq adeel arshad Mushtaq Ahmed Salma Taha Shireen Omer Saber Al Sarafandi Omer Rabadi Hisham A. Abdul-Sattar Department of Chest Hamad General Hospital Doha Qatar Department of Medicine Hamad General Hospital Doha Qatar

Background: Distinguishing tuberculous pleural effusion (TPE) from other causes of exudative effusion is often challenging. Delay in treatment initiation can occur while awaiting histo-microbiologic confirmation owing to the paucibacillary nature of the disease. Sago-like nodules are the most common visual finding on gross thoracoscopic appearance. The primary objective was to determine the diagnostic utility of the presence of sago-like nodules on gross thoracoscopic appearance in TPE to help justify early initiation of tuberculosis (TB) treatment based on their finding while awaiting final histo-microbiologic confirmation. Secondary objective was to study the correlation between the presence of sago-like nodules and the final histo-microbiologic findings in pleural biopsy specimens. Methods: This was a retrospective-descriptive study of all patients with exudative pleural effusion who underwent diagnostic medical thoracoscopy (MT) at Hamad General Hospital during an eight-year period (from January, 2008 to December, 2015). Results: The presence of sago-like nodules on gross thoracoscopic appearance of the pleural surface had a sensitivity of 58%, a specificity of 89% and a positive predictive value of 97% for TPE with a diagnostic accuracy of 62%. There is significant association between the presence of sago-like nodules and demonstration of granulomatous inflammation in pleural biopsy specimens (P = 0.000). There is no association between sago-like nodules and positive TB smear and culture in biopsy specimens. Conclusion: The presence of sago-like nodules on gross thoracoscopic appearance has a high specificity and positive predictive value for TPE and significantly correlates with the presence of granulomatous inflammation. Patients from TB prevalent areas with exudative pleural effusion and sago-like nodules on gross thoracoscopic appearance may be commenced on TB chemotherapy while awaiting final histologic confirmation.

关键词： Tuberculous Pleural Effusions Medical Thoracoscopy Sago-Like Nodules

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