Miao Wang

The US healthcare system is characterized by a persistent deadlock, where high costs, low efficiency, and inequity resist fundamental reform. This stalemate is rooted in deep ideological divides, political polarization, a fragmented fiscal structure, and the power of entrenched interest groups. This article analyzes how recent trade protectionist policies, specifically tariffs on pharmaceuticals and their inputs, intersect with this domestic gridlock. It posits a central paradox: a political system incapable of enacting major domestic health reform can simultaneously deploy assertive trade interventions in the same sector. The article argues that these tariffs should not be misconstrued as flawed instruments of healthcare reform. Instead, they represent the application of a distinct sovereigntist and protectionist logic, driven by national security concerns. The consequence is not a failed attempt at a solution, but a collision of policy agendas that actively exacerbates the healthcare system’s core dysfunctions. By increasing costs, destabilizing supply chains, and creating new arenas for interest group conflict, tariffs intensify partisan strife and further entrench the reform deadlock. This process, marked by the “securitization” of the pharmaceutical industry, signals a critical shift in global health governance, where geopolitical strategy now overrides and complicates the pursuit of domestic public health goals.

The inversion of directions is an important operation with directions which plays an important role in qualitative spatial reasoning and spatial queries. In this work, we address on the inversion operation of the basic cardinal direction relations in the model of Goyal. The direction relation matrix model proposed by Goyal is a projection-based model for spatial direction relations between regions. This model is simple in calculation and easy to carry out formal reasoning, which is considered as currently one of the most excellent models for representation and qualitative reasoning with cardinal direction relations in two-dimensional space. This work aims to realize the automatic inference and calculation of the inverse of the basic cardinal direction relations in the model of Goyal and further to improve the ability of spatial reasoning and spatial analysis of spatial database. In order to avoid the complicated manual reasoning, an algorithm for automatically performing the inverse operation on this model is devised by means of the operations of direction relation matrix. Theorems are provided to prove formally that our algorithm is correct and complete, which is also verified by comparing the result of our algorithm with that of manual reasoning for each basic cardinal direction relation. This study realized the automatic inference and calculation of the inverse of the basic cardinal direction relations in the model of Goyal and further improved the ability of spatial reasoning and spatial analysis of spatial database.

Because of the lack of interaction between seeking mode cats and tracking mode cats in cat swarm optimization, its convergence speed and convergence accuracy are affected. An information interaction strategy is designed between seeking mode cats and tracking mode cats to improve the convergence speed of the CSO. To increase the diversity of each cat, a top-N learning strategy is proposed during the tracking process of tracking mode cats to improve the convergence accuracy of the CSO. On ten standard test functions, the average values, standard deviations, and optimal values of the proposed algorithm with different N values are compared with the original CSO algorithm and the adaptive cat swarm algorithm based on dynamic search. Experimental results show that the global search ability and the convergence speed of the proposed algorithm are significantly improved on all test functions. The proposed two strategies will improve the convergence accuracy and convergence speed of CSO greatly.