Capital Normal University

About: Capital Normal University is a education organization based out in Beijing, China. It is known for research contribution in the topics: Terahertz radiation & Quantum entanglement. The organization has 11441 authors who have published 11988 publications receiving 159071 citations. The organization is also known as: Shǒudū Shīfàn Dàxué.

Performance-Aware Mobile Community-Based VoD Streaming Over Vehicular Ad Hoc Networks

Abstract: Leveraging the development of mobile communication technologies and increased capabilities of mobile devices, mobile multimedia services have set new trends. To support high-quality Video-on-Demand (VoD) in mobile wireless networks, using virtual community-based approaches to balance the efficiency of content sharing and maintenance cost of performance-aware solutions has attracted increasing research interest. In this paper, we propose a novel Performance-aware Mobile Community-based VoD streaming solution over vehicular ad hoc networks (PMCV). PMCV relies on a newly designed mobile community detection scheme and an innovative community member management mechanism. The former employs a novel fuzzy ant-inspired clustering algorithm and an innovative mobility similarity estimation model to group together the mobile users with similar behavior in terms of playback and movement into mobile communities. The latter introduces the role and task of members, member join and leave, collaborative store and search for resources, and replacement of a broker member. Simulation-based testing shows how PMCV outperforms another state-of-the-art solution in terms of performance.

Poaceae-specific MS1 encodes a phospholipid-binding protein for male fertility in bread wheat

Abstract: Male sterility is an essential trait in hybrid seed production for monoclinous crops, including rice and wheat. However, compared with the high percentage of hybrid rice planted in the world, little commercial hybrid wheat is planted globally as a result of the lack of a suitable system for male sterility. Therefore, understanding the molecular nature of male fertility in wheat is critical for commercially viable hybrid wheat. Here, we report the cloning and characterization of Male Sterility 1 (Ms1) in bread wheat by using a combination of advanced genomic approaches. MS1 is a newly evolved gene in the Poaceae that is specifically expressed in microsporocytes, and is essential for microgametogenesis. Orthologs of Ms1 are expressed in diploid and allotetraploid ancestral species. Orthologs of Ms1 are epigenetically silenced in the A and D subgenomes of allohexaploid wheat; only Ms1 from the B subgenome is expressed. The encoded protein, Ms1, is localized to plastid and mitochondrial membranes, where it exhibits phospholipid-binding activity. These findings provide a foundation for the development of commercially viable hybrid wheat.

Construction of metal–organic frameworks (MOFs) and highly luminescent Eu(III)-MOF for the detection of inorganic ions and antibiotics in aqueous medium

Abstract: The hydrothermal reaction of Ln(NO3)3·6H2O with 2,3′-oxybis(benzoic acid) (2,3′-H2oba) and 1,10-phenanthroline (phen) afforded the metal–organic frameworks (Ln-MOFs), [Ln2(2,3′-oba)3(phen)2]n (Ln = La 1, Eu 2, Gd 3, and Tb 4). 1 possesses a 3D network with [La1O7N2] and [La2O7N2] polyhedra, and 2–4 exhibit similar 3D networks containing [Ln1O7N2] and [Ln2O6N2] polyhedra. These complexes are thermally stable in air and have high stability in water in a wide pH range (acidic pH = 3 and alkaline pH = 13 solutions). Notably, MOFs 2 and 4 display bright red and green emission with the high fluorescence quantum yields of 75.57% and 41.86%, respectively. The highly luminescent chemically stable Eu-MOF shows multi-responsive luminescence sensing functions to detect Fe3+, Cr6+, and metronidazole (MDZ) in aqueous medium even in acidic conditions (pH = 3) via a fluorescence quenching mechanism. Excess Fe3+, Cr6+, and antibiotics can cause environmental pollution and serious diseases; thus, their detection is very important. In addition, one of the important advantages of Eu-MOF is that this complex can be excited at a long excitation wavelength (352 nm), which is in the near-visible radiation region of 350 nm < λex < 420 nm, and is an important requirement for its applications.