This study proposes a novel Alamouti-Orthogonal Frequency Division Multiplexing (OFDM) system that mitigates constructive and destructive interference in practical multi-antenna wireless communications. Experimental results across multiple scenarios demonstrate that, under spatial misalignment, the Alamouti-OFDM system provides a maximum Signal-to-Noise Ratio (SNR) gain of 3.45 dB over traditional diversity transmission systems; in scenarios where traditional methods exhibit  > 10 dB spectral fluctuations, our system confines the spectral variations of the received signals within 2 dB.

A new study examines how limited parking affects electric vehicle commuters and shows that parking permit schemes can reduce inefficient competition for spaces. By modelling commuting, charging and parking decisions across multiple travel corridors, the researchers find that carefully designed permit allocation can lower system-wide travel costs while revealing important trade-offs between efficiency and equity.

Researchers created a nationwide pollution snapshot of 4 diamide insecticides (DAIs) across 47 cities and 9 major Chinese river basins. Cyantraniliprole (CYTP) was the most abundant, but broflanilide (BFA) produced the highest screening-level concern for benthic midges because its species-specific chronic threshold was lower. Crop-use patterns shaped regional composition patterns. Children’s modeled cumulative exposure from raw surface-water ingestion was 2.4 times the adults’ value, although all hazard quotients remained below 1.

Under universal health coverage, allocating antidepressant benefits requires balancing health costs, clinical efficacy, and patient financial protection. We propose a dual societal–household disease-burden optimization framework and a triple-population cooperative particle swarm algorithm. Validated on real-world data from City S, China, the optimized reimbursement package cuts household out-of-pocket spending by up to 48.97% per unit treatment effect, offering a transferable decision-support tool for mental health financing and health equity in low- and middle-income countries.

Every online order sets off a complex chain of operational decisions, from choosing where items are fulfilled to picking, shipping and returns. A new review of 198 studies maps these decisions across the end-to-end B2C fulfillment process and shows how research is moving toward integrated, real-time and data- and AI-enabled decision-making, offering a roadmap for more efficient and responsive e-commerce operations.

Researchers have discovered that precisely balancing sulfur and selenium in eco-friendly quantum dots can minimize performance-killing atomic defects, unlocking record-breaking efficiency for solar hydrogen production. By fine-tuning the chalcogenide composition in copper-indium-sulfur-selenium quantum dots, the team found that a 1:1 sulfur-to-selenium ratio minimizes crystal lattice distortion and reduces anion vacancies to their lowest level. This structural optimization dramatically improves charge carrier concentration and lifetime, enabling more efficient conversion of sunlight into hydrogen fuel without using toxic heavy metals.

Researchers have developed SuSha, a multi-model ensemble learning tool that predicts a microorganism's salt tolerance directly from its genome. Trained on the amino acid composition of 123 bacterial and archaeal species and validated on 2,678 metagenomes from freshwater, marine, and hypersaline habitats worldwide, SuSha achieved over 90% accuracy for extreme halophiles. It offers a powerful way to study the more than 81% of microbes that cannot be cultured in the lab.

A new review examines how the gut microbiota interacts with radiotherapy. Radiation can disrupt intestinal bacteria and metabolism, while microbial communities and their metabolites may influence tumor radiosensitivity and radiation-induced intestinal injury. The authors discuss microbiota-targeted strategies, including probiotics, dietary interventions and traditional Chinese medicine (TCM)-derived compounds, while emphasizing the need for further clinical evidence.