Donghua University

About: Donghua University is a education organization based out in Shanghai, China. It is known for research contribution in the topics: Fiber & Nanofiber. The organization has 21155 authors who have published 21841 publications receiving 393091 citations. The organization is also known as: Dōnghuá Dàxué & China Textile University.

Boundedness and decay enforced by quadratic degradation in a three-dimensional chemotaxis–fluid system

Abstract: The coupled chemotaxis–fluid system $$\left\{ \begin{array}{lll} &n_t + u\cdot abla n = \Delta n - abla \cdot (n abla c) +rn-\mu n^2, \\ & c_t + u\cdot abla c = \Delta c-c+n , \\ & u_t + abla P = \Delta u + n abla \phi + g(x,t), \\ & abla \cdot u = 0, \end{array}\right.$$ is considered under no-flux boundary conditions for n and c and no-slip boundary conditions for u in three-dimensional bounded domains with smooth boundary, where $${r\geq 0}$$ and $${\mu > 0}$$ are given constants and $${\phi\in W^{1, \infty}(\Omega)}$$ and $${g\in C^1(\bar\Omega\times [0, \infty)) \cap L^\infty(\Omega\times (0,\infty))}$$ are prescribed parameter functions. It is shown that under the explicit condition $${\mu\geq 23}$$ and suitable regularity assumptions on the initial data, the corresponding initial-boundary problem possesses a global classical solution which is bounded. Apart from this, it is proved that if r = 0, then both n(·, t) and c(·, t) decay to zero with respect to the norm in $${L^\infty(\Omega)}$$ as $${t\to \infty}$$ , and that if, moreover, $${\int_0^\infty \int_\Omega |g|^2 < \infty}$$ , then also u(·, t)→ 0 in $${L^\infty(\Omega)}$$ as $${t\to \infty}$$ .

A review on supply chain contracting with information considerations: information updating and information asymmetry

Abstract: Supply chain contracting and the use of information are undoubtedly two critical and influential areas in modern supply chain management. However, relatively little is known about supply chain cont...

Acoustic energy absorption properties of fibrous materials: A review

Abstract: Fibrous materials have been widely used in noise reduction due to the porous structures. In this review, available studies regarding the prediction methods of acoustic absorption coefficient are gathered. Empirical model could predict the acoustic absorption coefficient based on facile airflow resistivity, while microstructural model is determined by detailed structural parameters of fibrous materials. Various fibrous materials including inorganic and metallic fibers, synthetic fibers, natural fibers, and nanofibrous membranes for noise reduction are reviewed. Inorganic and metallic fibers have the advantages of corrosion resistance, high temperature resistance and long service life. The tailored cross-sections of synthetic fibers such as circle, hollow and triangle are beneficial to improve acoustic absorption properties. Natural fibrous materials are biodegradable, renewable and eco-friendly. Nanofibrous materials are lightweight and have good potential in low frequency noise reduction. Herein, we summarized the recent advances concerning the acoustic absorption of various fibrous materials.

Graphene-Wrapped Polyaniline Nanowire Arrays on Nitrogen-Doped Carbon Fabric as Novel Flexible Hybrid Electrode Materials for High-Performance Supercapacitor

Abstract: We report the synthesis of reduced graphene oxide (RGO) sheet wrapped polyaniline (PANI) nanowire arrays grown on nitrogen-doped carbon fiber cloth (eCFC). The RGO coating layer is important to accommodate volume change and mechanical deformation of the coated PANI nanowires arrays during the long-term charge/discharge processes. The resulting hierarchical symmetric supercapacitor based on RGO/PANI/eCFC composites shows an enhanced capacitive behavior with a maximum energy density of 25.4 Wh kg(-1), a maximum power density of 92.2 kW kg(-1) and a specific capacitance of 1145 F g(-1), which is higher than that of PANI/eCFC (1050 F g(-1)) and GO/PANI/eCFC (940 F g(-1)). Moreover, the assembled supercapacitor exhibits excellent charge/discharge rates and a good cycling stability, retaining over 94% of its initial capacitance after 5000 cycles.

Intrinsically stretchable transparent electrodes based on silver-nanowire?crosslinked-polyacrylate composites

Abstract: Stretchable transparent composites have been synthesized consisting of a silver nanowire (AgNW) network embedded in the surface layer of a crosslinked poly(acrylate) matrix The interpenetrating networks of AgNWs and the crosslinked polymer matrix lead to high surface conductivity, high transparency, and rubbery elasticity The presence of carboxylic acid groups on the polymer chains enhances the bonding between AgNWs and the polymer matrix, and further increases the stretchability of the composites The sheet resistance of the composite electrode increases by only 23 times at 50% strain Repeated stretching to 50% strain and relaxation only causes a small increase of the sheet resistance after 600 cycles The morphology of the composites during reversible stretching and relaxation has been investigated to expound the conductivity changes