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Biomedical Engineering and Bioengineering Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Discipline
- Institution
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- Nanotechnology (5)
- Biotechnology (4)
- Ancient Chinese Mathematics (3)
- ALLOMETRIC SCALING LAWS; E-INFINITY THEORY; ELECTROSPUN NANOFIBERS; BODY-SIZE; BIOLOGY; FIBERS; BRAIN; MODEL (1)
- BOMBYX-MORI SILK; SPIDER SILK; MAMMALIAN-CELLS; FIBERS; POLYMER; SCIENCE (1)
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- Duffing equation (1)
- Electrospinning (1)
- Exp-function method (1)
- Exp-function method; Nonlinear dispersive K(m (1)
- Fractal dimension (1)
- He Chengtian inequality (1)
- Homotopy perturbation method (1)
- Metabolic rate (1)
- Monograph (1)
- N) equations; Higher order nonlinearity (1)
- Nano-effect (1)
- Nanobubble dynamics and spider (1)
- Nanofiber (1)
- Nanofiber electrospinning bead (1)
- Nonlinear Oscillation (1)
- Parameter-expanding method /parameter-expansion method (1)
- Period (1)
- Review article (1)
- Sheep (1)
- Spider (1)
- Wool fiber (1)
Articles 1 - 17 of 17
Full-Text Articles in Biomedical Engineering and Bioengineering
Biomimic Fabrication Of Electrospun Nanofibers With High-Throughput, Ji-Huan He, Yong Liu, Lan Xu, Jian-Yong Yu, Gang Sun
Biomimic Fabrication Of Electrospun Nanofibers With High-Throughput, Ji-Huan He, Yong Liu, Lan Xu, Jian-Yong Yu, Gang Sun
Ji-Huan He
Spider-spun fiber is of extraordinary strength and toughness comparable to those of electrospun fiber, the later needs a very high voltage (from several thousands voltage to several ten thousands voltages) applied to water-soluble protein “soup” that was produced by a spider, furthermore, its mechanical strength dramatically decreases comparable to spider silk. A possible mechanism in spider-spinning process is given, the distinct character in spider-spinning is that its spinneret consists of millions of nano scale tubes, and a bubble can be produced at the apex of each nano-tube. The surface tension of each bubble is extremely small such that it can …
Max-Min Approach To Nonlinear Oscillators, Ji-Huan He
Max-Min Approach To Nonlinear Oscillators, Ji-Huan He
Ji-Huan He
This paper suggests a novel method called max-min method. Maximal and minimal solution thresholds of a nonlinear problem can be easily found, and an approximate solution of the nonlinear equation can be easily deduced using He Chengtian’s interpolation, which has millennia history. Application of the method to nonlinear oscillators is systematically illustrated, illustrating examples show the present technology is very convenient and effective
Comment On ‘He’S Frequency Formulation For Nonlinear Oscillators’, Ji-Huan He
Comment On ‘He’S Frequency Formulation For Nonlinear Oscillators’, Ji-Huan He
Ji-Huan He
Geng and Cai suggested a modified He’s frequency–amplitude formulation for nonlinear oscillators (Geng and Cai 2007 Eur. J. Phys. 28 923–31). We point out the accuracy of both the original one and the modified version depends upon the chosen location point, and so far we have no general rule for the location choice. The method of weighted residuals is suggested to overcome the shortcoming.
An Improved Amplitude-Frequency Formulation For Nonlinear Oscillators, Ji-Huan He
An Improved Amplitude-Frequency Formulation For Nonlinear Oscillators, Ji-Huan He
Ji-Huan He
A brief introduction to amplitude-frequency formulae for nonlinear oscillators is given, an improved one is suggested
Controlling Numbers And Sizes Of Beads In Electrospun Nanofibers, Yong Liu, Ji-Huan He, Jian-Yong Yu, Hong-Mei Zeng
Controlling Numbers And Sizes Of Beads In Electrospun Nanofibers, Yong Liu, Ji-Huan He, Jian-Yong Yu, Hong-Mei Zeng
Ji-Huan He
Abstract BACKGROUND: Electrospinning is a powerful and effective method to produce nanofibers. Beads have been observed widely in electrospun products, but effects of solvents, weight concentrations and salt additives on the number and morphology of beads in the electrospinning process have not been systematically studied. RESULTS: Both theoretical analysis and experimental results show that beads strongly depend upon solvents, weight concentrations and salt additives. Either a suitable weight concentration or a suitable salt additive can completely prevent the occurrence of beads in the electrospinning process; solvents can affect the number of beads and the morphology of electrospun fibers. CONCLUSION: Beads …
Geometrical Approach To Length-Biomass Allometry In Predominantly Bidimensional Seaweeds, Ji-Huan He
Geometrical Approach To Length-Biomass Allometry In Predominantly Bidimensional Seaweeds, Ji-Huan He
Ji-Huan He
Scosati studied experimentally length-biomass allometry in primary producers (vascular plants and unicellular microalgae), and found the allometric exponent (0.5, 95% confidence) differs significantly from the “universal” value, 0.25 suggested by Niklas and Enquist. Here, a geometrical similarity is proposed to elucidate Scosati’s findings.
A New Resistance Formulation For Carbon Nanotubes, Ji-Huan He
A New Resistance Formulation For Carbon Nanotubes, Ji-Huan He
Ji-Huan He
A new resistance formulation for carbon nanotubes is suggested using fractal approach. The new formulation is also valid for other nonmetal conductors including nerve fibers, conductive polymers, and molecular wires. Our theoretical prediction agrees well with experimental observation.
Non-Ionic Surfactants For Enhancing Electrospinability And For The Preparation Of Electrospun Nanofibers, Shu-Qiang Wang, Ji-Huan He, Lan Xu
Non-Ionic Surfactants For Enhancing Electrospinability And For The Preparation Of Electrospun Nanofibers, Shu-Qiang Wang, Ji-Huan He, Lan Xu
Ji-Huan He
Abstract BACKGROUND: Electrospinning is widely used to produce nanofibers; however, not every polymer can be electrospun into nanofibers. To enhance electrospinability, much effort has been made in designing new apparatus, such as vibration-electrospinning, magneto-electrospinning and bubble-electrospinning. RESULTS: A representative non-ionic surfactant, TritonR X-100, is used to enhance electrospinability. The surfactant is added to an electrospun poly(vinyl pyrrolidone) polymer solution, and a dramatic reduction in surface tension is observed. As a result, a moderate voltage is needed to produce fine nanofibers, which are commonly observed during the conventional electrospinning procedure only at elevated voltage. CONCLUSION: The novel strategy produces smaller nanofibers …
An Elementary Introduction To Recently Developed Asymptotic Methods And Nanomechanics In Textile Engineering, Ji-Huan He
An Elementary Introduction To Recently Developed Asymptotic Methods And Nanomechanics In Textile Engineering, Ji-Huan He
Ji-Huan He
This review is an elementary introduction to the concepts of the recently developed asymptotic methods and new developments. Particular attention is paid throughout the paper to giving an intuitive grasp for Lagrange multiplier, calculus of variations, optimization, variational iteration method, parameter-expansion method, exp-function method, homotopy perturbation method, and ancient Chinese mathematics as well. Subsequently, nanomechanics in textile engineering and E-infinity theory in high energy physics, Kleiber's 3/4 law in biology, possible mechanism in spider-spinning process and fractal approach to carbon nanotube are briefly introduced. Bubble-electrospinning for mass production of nanofibers is illustrated. There are in total more than 280 references
Electrospun Nanofibres And Their Applications, Ji-Huan He, Yong Liu, Lu-Feng Mo, Yu-Qin Wan, Lan Xu
Electrospun Nanofibres And Their Applications, Ji-Huan He, Yong Liu, Lu-Feng Mo, Yu-Qin Wan, Lan Xu
Ji-Huan He
This Update covers all aspects of electrospinning as used to produce Nanofibres. It contains an array of colour diagrams, mathematical models, equations and detailed references. It will be invaluable to anyone who is interested in using this technique and also to those interested in finding out more about the subject. Electrospinning is the cheapest and the most straightforward way to produce nanomaterials. Electrospun Nanofibres are very important for the scientific and economic revival of developing countries. Electrospinning was developed from electrostatic spraying and now represents an attractive approach for polymer biomaterials processing, with the opportunity for control over morphology, porosity …
Nano Bubble Dynamics In Spider Spinning System, Ji-Huan He
Nano Bubble Dynamics In Spider Spinning System, Ji-Huan He
Ji-Huan He
A possible mechanism in the spider-spinning process is illustrated and a nanobubble dynamical model is suggested. The spinning system consists of thousands of nano scale spigots and a bubble can be produced at the apex of each nano-spigot. Nano-effect enables the dragline silk to have of extraordinary strength and toughness, while the extremely small surface tension of nanobubbles enables the spider to use an awfully small force during the spinning procedure.
Nonlinear Oscillator With Discontinuity By Parameter-Expansion Method, Shu-Qiang Wang, Ji-Huan He
Nonlinear Oscillator With Discontinuity By Parameter-Expansion Method, Shu-Qiang Wang, Ji-Huan He
Ji-Huan He
The parameter-expansion method is applied to a nonlinear oscillator with discontinuity. One iteration is sufficient to obtain a highly accurate solution, which is valid for the whole solution domain. Comparison of the obtained solution with the exact one shows that the method is very effective and convenient.
Electrospinning: A Promising Technology For Discontinuous And Continuous Nanofibers, Ji-Huan He
Electrospinning: A Promising Technology For Discontinuous And Continuous Nanofibers, Ji-Huan He
Ji-Huan He
No abstract provided.
Exp-Function Method To Solve The Nonlinear Dispersive K(M,N) Equations, Xin-Wei Zhou, Yi-Xin Wen, Ji-Huan He
Exp-Function Method To Solve The Nonlinear Dispersive K(M,N) Equations, Xin-Wei Zhou, Yi-Xin Wen, Ji-Huan He
Ji-Huan He
Some new exact solutions are obtained for the nonlinear dispersive K(m, n) equations using the exp-function method. The results show that the method is straightforward and concise and its applications are promising.
Hierarchy Of Wool Fibers And Fractal Dimensions, Jie Fan, Jun-Fang Liu, Ji-Huan He
Hierarchy Of Wool Fibers And Fractal Dimensions, Jie Fan, Jun-Fang Liu, Ji-Huan He
Ji-Huan He
Wool fiber shows excellent advantages in warmth-retaining and many other practical properties possibly due to its hierarchical structure. Its fractal dimension of wool fiber is calculated which is very close to the Golden Mean, 1.618. The present study might provide a new interpretation for the reason why wool fiber has so many excellent properties
Fatalness Of Virus Depends Upon Its Cell Fractal Geometry, Ji-Huan He
Fatalness Of Virus Depends Upon Its Cell Fractal Geometry, Ji-Huan He
Ji-Huan He
Why do more complex viruses (e.g., HIV, AIDS-virus and SARS coronavirus) tend to be more fatal? The paper concludes that the cell fractal geometry of viruses is the key. This paper also suggests two possible new approaches using nanotechnology and temperature to cure or prevent virus infection
Recent Development Of The Homotopy Perturbation Method, Ji-Huan He
Recent Development Of The Homotopy Perturbation Method, Ji-Huan He
Ji-Huan He
The homotopy perturbation method is extremely accessible to non-mathematicians and engineers. The method decomposes a complex problem under study to a series of simple problems that are easy to be solved. This note gives an elementary introduction to the basic solution procedure of the homotopy perturbation method. Particular attention is oaid to constructing a suitable homotopy equation.