Results 141 to 150 of about 12,175,996 (314)

Coating‐Free Nanoscratching for Liquid‐Crystal Alignment on PCB‐Compatible Millimeter‐Wave Reflective Unit Cells

Advanced Materials Technologies, EarlyView.
Direct nanoscratching with a 500 nm diamond lapping film creates groove‐guided liquid‐crystal alignment interfaces on PCB‐compatible Cu‐patterned RF substrates within minutes, eliminating polymer coating and high‐temperature baking. The coating‐free process enables optical/molecular alignment validation and voltage‐programmable 28 GHz reflection‐phase ...
Junseok Ma, Ga‐Yeong Park, Geunjung Lee, Hyo‐Won Lee, Jong‐Won Yu, Dong Ki Yoon   +5 more
wiley   +1 more source

Saddle Points of Partial Augmented Lagrangian Functions

Mathematical and Computational Applications
In this paper, we study a class of optimization problems with separable constraint structures, characterized by a combination of convex and nonconvex constraints.
Longfei Huang, Jingyong Tang, Yutian Wang, Jinchuan Zhou   +3 more
doaj   +1 more source

Wood‐Derived Nanocellulose‐Biocarbon Fresnel‐Zone Plate Lenses for Sub‐THz Frequency Applications

Advanced Materials Technologies, EarlyView.
Wood‐derived nanocellulose and lignin‐based biocarbon were combined to fabricate fully bio‐based Fresnel zone plate (FZP) lenses for sub‐terahertz frequencies. These sustainable FZP lenses exhibit low dielectric loss and high directivity, achieving performance comparable to that of metallic references, and remain functional under environmental stress ...
Riikka Haataja, Mikko Kokkonen, Niina Halonen, Sami Myllymäki, Umair Rafique, Mandeep Singh, Ossi Laitinen, Heli Jantunen, Kristiina Oksman, Henrikki Liimatainen   +9 more
wiley   +1 more source

Improved variable step-size LMS algorithm based on hyperbolic tangent function

Tongxin xuebao, 2020
In order to improve that the LMS algorithm for determining step size cannot satisfy both rapid convergence and low steady-state misalignment errors,a variable step size algorithm (IVSSLMS) based on an improved hyperbolic tangent function was proposed.The
Jianwu ZHANG, Hao YU, Qianhua ZHANG
doaj   +2 more sources

Spacer‐Less Substrate‐Integrated Metasurface for Near‐Unity Terahertz Absorption

Advanced Optical Materials, EarlyView.
ABSTRACT Although conventional metal‐insulator‐metal (MIM) terahertz (THz) absorbers can provide near‐unity absorption, their multilayer stacks inevitably introduce additional thickness, mass, and residual stress, which limit their compatibility with THz thermal sensing platforms.
Zihao Zhao, Kazuho Harada, Qian Liu, Isao Morohashi, Xu Fang, Kazuhiko Hirakawa, Ya Zhang   +6 more
wiley   +1 more source

Lomax tangent generalized family of distributions: Characteristics, simulations, and applications on hydrological-strength data

Heliyon
This article proposes and discusses a novel approach for generating trigonometric G-families using hybrid generalizers of distributions. The proposed generalizer is constructed by utilizing the tangent trigonometric function and distribution function of ...
Sajid Mehboob Zaidi, Zafar Mahmood, Mintodê Nicodème Atchadé, Yusra A. Tashkandy, M.E. Bakr, Ehab M. Almetwally, Eslam Hussam, Ahmed M. Gemeay, Anoop Kumar   +8 more
doaj   +1 more source

Microcone Array‐Mediated Distance Tuning for Photonic Nanojet‐Amplified SERS

Advanced Optical Materials, EarlyView.
A tunable microcone array platform provides precise vertical gap control between dielectric microspheres and a SERS‐active surface. This structural regulation aligns the photonic nanojet focal point with plasmonic hotspots, delivering a 15‐fold optical signal enhancement.
Chen‐Ting Hung, Yan‐Ru Liu, Ko‐Chi Chen, You‐Chia Chang, Yuh‐Lin Wang, Yih‐Fan Chen   +5 more
wiley   +1 more source

Derivation of a tangent function using an integrated circuit four-quadrant multiplier [PDF]

, 1973
A tangent function generator is provided which utilizes input signals proportionate to the sine and cosine of a given angle. The equipment accomplishes a trigonometric manipulation which forms an output signal substantially independent of the input ...
Bregman, B. J.
core   +1 more source

On a conjecture of double inequality for the tangent function

Hacettepe Journal of Mathematics and Statistics, 2016
In this paper, we prove the conjecture posed by J.-L. Zhao, Q.-M. Luo,B.-N. Guo and F. Qi (Remarks on inequalities for the tangent function,Hacettepe J. Math. Stat., 41, no. 4, 499-506, 2012) about a sharp double inequality of the tangent function, which is a generalization of theBecker-Stark inequality.
openaire   +3 more sources

Soft Robotic Excretory Care Simulator for Nursing Education: Functional and Perceptual Biomimetics Approach

Advanced Robotics Research, EarlyView.
A soft robotic simulator is developed to replicate the digital removal of feces (DRF), a sensitive yet essential nursing procedure. Integrating soft actuators, sensors, and a realistic rectal model, the simulator balances functional fidelity with perceptual realism. Engineering evaluations and nurse feedback confirm its potential to enhance training in
Shoko Miyagawa, Sota Suzuki, Shizuka Watanabe, Zebing Mao, Young Ah Seong, Toshinori Fujie, Tatsuhiro Horii, Kenjiro Tadakuma, Koichi Suzumori, Hiroyuki Nabae, Shingo Maeda   +10 more
wiley   +1 more source