Results 121 to 130 of about 217,177 (294)

A Rational Approximation of the Two-Term Machin-like Formula for π

AppliedMath
In this work, we consider the properties of the two-term Machin-like formula and develop an algorithm for computing digits of π by using its rational approximation. In this approximation, both terms are constructed by using a representation of 1/π in the
Sanjar M. Abrarov, Rehan Siddiqui, Rajinder Kumar Jagpal, Brendan M. Quine   +3 more
doaj   +1 more source

APPROXIMATION OF FREE-FORM CURVE – AIRFOIL SHAPE [PDF]

Journal of Engineering Science and Technology, 2013
Approximation of free-form shape is essential in numerous engineering applications, particularly in automotive and aircraft industries. Commercial CAD software for the approximation of free-form shape is based almost exclusively on parametric polynomial ...
CHONG PERK LIN, CHEONG KHAI YIP
doaj  

Well-posedness of one-way wave equations and absorbing boundary conditions [PDF]

A one-way wave equation is a partial differential which, in some approximate sense, behaves like the wave equation in one direction but permits no propagation in the opposite one.
Halpern, L., Trefethen, L. N.
core   +1 more source

Decoupling Size and Electronic Effects in Doped SrTiO3 Photocatalysts Through Surface Area–Normalized CO2 Hydrogenation Rates

Advanced Functional Materials, EarlyView.
Exploring the photocatalytic reverse water–gas shift (RWGS) reaction on doped SrTiO3 nanoparticle films, reveals that normalizing catalytic rates by the catalyst's specific surface area (SSA) disentangled surface area effects from the catalyst's intrinsic material properties.
Dikshita Bhattacharyya, Baliana Shani, Isaac Holmes‐Gentle, Gerardo T Martinez, Martyn McLachlan, Nicola Seriani, Ludmilla Steier   +6 more
wiley   +1 more source

Best approximation to 1 − x by special rational functions

Journal of Approximation Theory, 1987
The author proves that the order of best approximations of \(1-x^ m\) on [0,1] by rational functions P(x)/Q(x), where P(x) has non-negative, non- decreasing coefficients and degree \(\leq m-1\) and Q(x) has non-negative, non-increasing coefficients and degree \(\leq n(Q(0)>0)\) is exactly \(m/(m+n+1)\).
openaire   +2 more sources

Investigating the performance of single- and multichannel wireless receivers in generic-K fading channels [PDF]

Maejo International Journal of Science and Technology, 2011
By using versatile generic-K statistical model, a performance analysis of wireless system has been carried out through the composite fading channel scenarios.
Jyoteesh Malhotra
doaj  

Electroactive Metal–Organic Frameworks for Electrocatalysis

Advanced Functional Materials, EarlyView.
Electrocatalysis is crucial in sustainable energy conversion as it enables efficient chemical transformations. The review discusses how metal–organic frameworks can revolutionize this field by offering tailorable structures and active site tunability, enabling efficient and selective electrocatalytic processes.
Irena Senkovska, Yutong Luo, Ruyan Zhao, Jianjun Zhang, Mingchao Wang, Xinliang Feng, Eike Brunner, Stefan Kaskel   +7 more
wiley   +1 more source

Band Alignment in In‐Oxo Metal Porphyrin SURMOF Heterojunctions

Advanced Functional Materials, EarlyView.
Porphyrin core metalation in indium‑oxo SURMOFs enables systematic tuning of band edge positions without altering the crystal structure. First‑principles calculations reveal type‑I and type‑II heterostructures as well as multi‑junction energy cascades, establishing a modular strategy for exciton funneling and charge separation in optoelectronic ...
Puja Singhvi, Nina Vankova, Thomas Heine
wiley   +1 more source

Expanding Chemical Space of Nucleic Acid Nanoparticles for Tunable Antiviral‐Like Immunomodulatory Responses and Potent Adjuvant Activity

Advanced Functional Materials, EarlyView.
We introduce a nucleic acid nanoparticle (NANP) platform designed to be rrecognized by the human innate immune system in a regulated manner. By changing chemical composition while maintaining constant architectural parameters, we identify key determinants of immunorecognition enabling the rational design of NANPs with tunable immune activation profiles
Martin Panigaj, Hannah S. Newton, Jian Wang, Laxmi Pandey, Yelixza I. Avilla, Phong Nguyen, Morgan Chandler, Justin Halman, Yasmine Radwan, Stephanie Smith, Elijah Edmondson, Simone Difilippantonio, Chelsea Sanders, Bao Tran, Yongmei Zhao, Shaojun Xie, Edward Cedrone, Barry W. Neun, Meni Wanunu, Nikolay V. Dokholyan, Marina A. Dobrovolskaia, Kirill A. Afonin   +21 more
wiley   +1 more source

Approximation in the mean by rational functions

, 2019
For $1\le t < \infty$, a compact subset $K\subset\mathbb C$, and a finite positive measure $ $ supported on $K$, $R^t(K, )$ denotes the closure in $L^t( )$ of rational functions with poles off $K$. Let $\text{abpe}(R^t(K, ))$ denote the set of analytic bounded point evaluations.
Conway, John B., Yang, Liming
openaire   +2 more sources