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Characteristic Analysis of longitudinal vibration Sucker Rod String With Variable Equivalent Stiffness

Considering the influence of variable equivalent stiffness on system response, the equivalent stiffness is defined as a step function, and a mathematical model of nonlinear longitudinal vibration of sucker rod string (SRS) is built. The dynamic response under displacement and load force excitation is solved by fourth-order Runge-Kutta method with zero initial condition. The...

Review Application of Nanostructured Black Silicon

As a widely used semiconductor material, silicon has been extensively used in many areas, such as photodiode, photodetector, and photovoltaic devices. However, the high surface reflectance and large bandgap of traditional bulk silicon restrict the full use of the spectrum. To solve this problem, many methods have been developed. Among them, the surface nanostructured silicon...

Stable Lithium Argon compounds under high pressure

, Jian Lv & Yanming MaCollege of Physics and Electronic Information, Luoyang Normal College, Luoyang 471022, P. R. ChinaXiaofeng Li & Feng PengCentre for Science at Extreme Conditions and SUPA, School of ... Feng Peng in:Nature Research journals • PubMed • Google ScholarSearch for Jian Lv in:Nature Research journals • PubMed • Google ScholarSearch for Yanchao Wang in:Nature Research journals • PubMed

Impact of Layer-by-Layer Self-Assembly Clay-Based Nanocoating on Flame Retardant Properties of Sisal Fiber Cellulose Microcrystals

The renewable cationic polyelectrolyte chitosan (CH) and anionic nanomontmorillonite (MMT) layers were alternately deposited on the surface of sisal fiber cellulose microcrystals (SFCM) via layer-by-layer (LBL) self-assembly method. The structure and properties of the composites were characterized by zeta potential, thermal gravimetric analysis (TGA), X-ray diffraction (XRD...

Preparation, Characterization, and Properties of In Situ Formed Graphene Oxide/Phenol Formaldehyde Nanocomposites

Graphene oxide (GO) has shown great potential to be used as fillers to develop polymer nanocomposites for important applications due to their special 2D geometrical structure as well as their outstanding mechanical, thermal, and electrical properties. In this work, GO was incorporated into phenol formaldehyde (PF) resin by in situ polymerization. The morphologies and structures...

Ectopic expression of a wheat MYB transcription factor gene, TaMYB73, improves salinity stress tolerance in Arabidopsis thaliana

MYB transcription factors (TFs) play pivotal roles in the abiotic stress response in plants, but their characteristics and functions in wheat (Triticum aestivum L.) have not been fully investigated. A novel wheat MYB TF gene, TaMYB73, is reported here based on the observation that its targeting probe showed the highest salinity-inducibility level among all probes annotated as MYB...

High pressure partially ionic phase of water ice

Laboratory of Superhard Materials, Jilin University, Changchun 130012, China.Yanchao Wang, Hanyu Liu, Jian Lv, Li Zhu, Hui Wang & Yanming Ma AuthorsSearch for Yanchao Wang in:Nature Research journals • PubMed ... • Google ScholarSearch for Hanyu Liu in:Nature Research journals • PubMed • Google ScholarSearch for Jian Lv in:Nature Research journals • PubMed • Google ScholarSearch for Li Zhu in:Nature Research journals