Portfolio weights solely based on risk avoid estimation errors from the sample mean, but they are still affected from the misspecification in the sample covariance matrix.To solve this problem, we shrink the covariance matrix towards the Identity, the Variance Identity, the Single-index model, the Common Covariance, the Constant Correlation, and th

Based on spatial resilience theory, this paper explores strategies for enhancing the design of wellness towns.With the intensification of population aging in China, the wellness industry has experienced significant development opportunities, leading to rapid advancements in wellness town construction.However, the planning and development of wellnes

The article substantiates the relevance of the inspection of overhead power lines by determining the mechanical loads of the conductors.The conductor sways under the action of external loads and variable internal mechanical loads.The conductor behaves in span like a pendulum.A model of the harmonic oscillations of the conductor in flight is derived

Abstract Solar arrays are the primary energy Medical and Ambulatory supplies / Apparel source for spacecraft.Although traditional rigid solar arrays improve power supply, the quality increases proportionally.Hence, it is difficult to satisfy the requirements of high-power and low-cost space applications.In this study, a shape-memory polymer composi

Abstract Background Reduced heart rate (HR) during vagus nerve stimulation (VNS) is associated with therapy for heart failure, but stimulation frequency and amplitude are limited by patient tolerance.An understanding of physiological responses to parameter adjustments would allow differential control of therapeutic and MASSAGE OIL side effects.To i