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Optimally Connected Hybrid Complex Networks with Windmill Graphs Backbone

Journal of Systems Science & Complexity 2020年第4期33卷 903-929页

作者： SAFAEI Farshad babaei amin MOUDI Mehrnaz Faculty of Computer Science and Engineering Shahid Beheshti UniversityTehranIran School of Computer Science Institute for Research in Fundamental SciencesTehranIran Department of Computer Engineering University of Torbat HeydariehTorbat HeydariehIran

The significance of the existing analysis methods in complex networks and easy access to the ever-increasing volume of information present the emergence of proposing new methods in various fields based on complex system ideas. However, these systems are usually faced with various random failures and intelligent attacks. Due to the nature of the components’ behaviors, the occurrence of the failures and faults in their operations and the alteration of their topologies are the most important problems. Since the complex systems are usually used as the infrastructures of other networks, their robustness against failures and the adoption of suitable precautions are necessary. Moreover, the smallworld effect in most complex systems is one of the crucial structural features. The authors found that the relation between these two is not well-known and may even be in conflict in some networks. The main goal in this paper is to achieve an optimal topology by utilizing a robustness-oriented multiobjective trade-off optimization model(edge rewiring) to establish a peaceful relationship between the two requirements. By offering a proposed rewiring method with the small-world effect, which is called core-periphery Windmill property, the authors demonstrated that the generated networks are able to exhibit appropriate robustness even during intelligent attacks. The results obtained in terms of Windmill graphs are presented very good approximations to demonstrate the small-world effect. These graphs are used as the initial core in the construction of the optimized networks’ topologies.

关键词： effect. utilizing Optimal

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The Role of Color Doppler Ultrasound Arterial Mapping for Decision Making in the Treatment of Patients with Lower Extremity Peripheral Arterial Disease

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Surgical Science 2013年第10期4卷 415-420页

作者： Ali babaei Jandaghi Zahra Mardanshahi Ahmad Alizadeh Iraj Baghi Hossein Hemmati Narges Tabarzan Baboli Shabnam Alizadeh Arasi amin Keshavarzzirak Department of Cardiology Heshmat Hospital Guilan University of Medical Sciences Rasht Iran Department of Radiology Poursina Hospital Guilan University of Medical Sciences Rasht Iran Department of Vascular Surgery Poursina Hospital Guilan University of Medical Sciences Rasht Iran Department of Vascular Surgery Razi Hospital Guilan University of Medical Sciences Rasht Iran

Purpose: To assess the efficacy of color Doppler imaging for decision making in the treatment of patients with lower extremity peripheral arterial disease (PAD) compared to digital subtraction angiography (DSA). Materials and Methods: Color Doppler scan was done on patients suspected for lower limb PAD, a day prior to the DSA which was done by a vascular surgeon. Also, for the patients who were candidates for endovascular intervention based on the color Doppler arterial mapping results, endovascular interventions were performed at the same time if the DSA findings are correlated with the color Doppler map. The grading for evaluated segments was normal, insignificant stenosis (<50%), hemodynamically significant stenosis (≥50%) and occlusion. We yielded the diagnostic efficacy indices of Doppler for detecting arterial stenosis in each 18 different arterial segments below the renal arteries including, infrarenal aorta, common and external iliac, common femoral, superficial femoral (proximal, middle and distal segments), deep femoral, popliteal artery, tibioperoneal trunk, anterior and posterior tibial arteries (proximal, middle and distal segments) and peroneal artery (proximal and distal segments). Then, we yielded the kappa agreement between Doppler and DSA findings considering the grade of stenosis in 18 arterial segments separately. Results: Totally 115 lower extremities (2045 arterial segments) were evaluated in 90 patients [mean age: 60.8 ± 8.9 (range: 47 - 84 years old)] of which 68 (75.6%) were men. The sensitivity of color Doppler for all arterial segments was 90% or higher except for common iliac artery, distal segment of superficial femoral artery and proximal segments of anterior and posterior tibialis and peroneal arteries. However, the specificity was 89% or higher, in all arterial segments. Kappa agreement was 0.72 or higher in all segments (All P-Values 0.001). Conclusion: This study suggests that considering excellent capability of color Doppler sonogr

关键词： Lower Extremity Peripheral Arterial Disease Color Doppler Sonography Arterial Mapping Digital Subtraction Angiography

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