The impact of input light polarization on the demodulation results in the 3×3 coupler-based current demodulation scheme is analyzed. By utilizing the features of a single circularly polarized optical fiber, this influence can be eliminated.
In interconnected networks, networks with smaller strong diameters tend to have better fault tolerance. This is because when the strong diameter of the network is small, the vertices are more closely connected and the path of information propagation is shorter, making it easier for the network to maintain communication and functionality in the event of an attack or failure. Whereas, when the strong diameter is large, the vertices are more distantly connected and the information propagation path is longer, which increases the vulnerability of the network and makes it more susceptible to attacks or failures. Therefore, strong diameter is one of the key metrics to measure and optimize the fault tolerance performance of the network. In this paper, a strong product network of cycles and paths is constructed by strong product and the strong diameter of this network is investigated. Specifically, we determine the minimum strong diameter of the strong product of even cycles and paths, and the upper and lower bounds of the minimum strong diameter of the strong product of odd cycles and paths. In addition, we give a lower bound on the maximum strong diameter of the strong product of cycles and paths, and present a conjecture on the maximum strong diameter of the strong product graph of cycles and paths.
Algorithms are commonly used to generate patrol routes. However, in cultural heritage protection patrols, traditional route planning methods often neglect the specific security requirements of cultural artifacts. Thus, there is a need for a specialized route planning algorithm and evaluation method tailored for cultural heritage protection to enhance security. This study proposes a method to optimize cultural heritage protection patrols, utilizing the Analytic Hierarchy Process (AHP) for comprehensive evaluation of pre-patrol route planning, actual patrol effectiveness, and patrol costs.During the pre-patrol route planning phase, to prevent the predictability of patrol routes and mitigate risks to cultural artifacts, this study employs an enhanced ant colony algorithm to generate multiple routes. It evaluates factors such as route differentiation and coverage of key patrol points, determining multiple patrol schemes based on these evaluations. To assess actual patrol effectiveness, the study analyzes patrol personnel GPS trajectories and extracts critical information. This optimization approach employs multidimensional quantitative analysis of the entire patrol system to enhance the efficiency and security of cultural heritage protection patrols.
This paper investigates the use of the diff - iteration method based on spectral interferometry for measuring the micro - dispersion of optical devices (optical fiber, lens, etc.). Using an optical frequency comb, based on the phase demodulation of dispersion interference spectrum, by employing the carefully designed diff - iteration method to solve the dispersion curve at any position and any order. Our approach is proficient in precisely measuring micro - dispersion across a broadband spectrum, without the need for cumbersome wavelength scanning processes or reliance on complex high - repetition - rate combs, while enabling adjustable resolution. The efficacy of the proposed method is validated through simulations and experiments. The approach ensures high precision, while maintaining a simple system structure, with realizing adjustable resolution, thereby propelling the practical implementation of precise measurement and control - dispersion.
In this paper, the problem of constructing an optimallinear code is considered. Four new codes with parameters [18,12,6], [21,16,5] over $\mathbb{F}_{9}$ , [20,15,5], [19,14,5] over $\mathbb{F}_{7}$ are determined. Their generator matrices and weight distributions are presented and these four linear codes are new and have better parameters than the known results.
