Chinese Science Bulletin

The development and research of composite materials for railway Brake Shoes (BS) is currently being implemented. Studies in the past have shown that the hand lay-up method can be successfully utilized to fabricate BS. Nevertheless, it was discovered that the final density did not match the range that INKA (Indonesian Railway Company) Ltd. had established, which was 1.7 to 2.4 g/cm³. The present research looked at how the duration that occurred during the compression molding process affected the composite BS's properties. The compression cold molding method was employed in the composite manufa

An increasing number of cutting-edge technologies have emerged due to the demand for high data rates. The radio frequency spectrum is becoming increasingly congested with the proliferation of wireless devices. Additionally, radio waves are restricted in areas susceptible to electromagnetic interference (EMI). Visible light communication (VLC) offers a promising alternative to radio-based communication. To demonstrate VLC’s data transmission capabilities using modulated LED light, this study focuses on visible light as a medium for data exchange. The paper introduces an innovative LED driver

In this manuscript, we explore the coincidence and common fixed point theorems for a pair of mappings (T, S), utilizing relation-theoretic weak contractions in a metric space endowed with a locally finitely T-transitive relation. The theoretical findings has been sup- ported with an example. The results presented in this work unify, generalize, improve, extend, refine, and enrich various well-established fixed-point theorems found in the existing literature.

We introduce the notion of quasi-regular polynomials in graphs.

Sanghuang mushrooms (Phellinus sp.), discovered in An Giang province, Vietnam, were initially identified as Phellinus sp. through morphological analysis and ITS sequence comparison, revealing 92% similarity in GenBank. Despite 8% variability, the mushrooms were tentatively classified under the genus Phellinus. The species Sanghuang mushroom (Phellinus linteus), identified through morphological and molecular biology methods, has been named Phellinus linteus AG by the authors. It was collected from the high mountainous region of An Giang Province, Vietnam. This study investigated optimal propaga