Results 81 to 90 of about 88,774 (301)

Removing Homocoupling Defects in Alkoxy/Alkyl‐PBTTT Enhances Polymer:Fullerene Co‐Crystal Formation and Stability

open access: yesAdvanced Functional Materials, EarlyView.
PBTTT‐OR‐R, a C14‐alkoxy/alkyl‐PBTTT polymer derivative, is of substantial interest for optoelectronics due to its specific fullerene intercalation behavior and enhanced charge‐transfer absorption. Comparing this polymer with (S) and without (O) homocoupling defects reveals that PBTTT‐OR‐R(O) forms stable co‐crystals with PC61BM, while PBTTT‐OR‐R(S ...
Zhen Liu   +14 more
wiley   +1 more source

Perception-Based CTU Level Bit Allocation for Intra High Efficiency Video Coding

open access: yesIEEE Access, 2019
The conventional rate control algorithm does not fully consider the characteristics of the Human Visual System (HVS). To address this problem, in this paper, a perception based Coding Tree Unit (CTU) level bit allocation algorithm for intra High ...
Xiaoyan Liu   +3 more
doaj   +1 more source

Bit error rate calculation for nonlinear interferencecancellation

open access: yesElectronics Letters, 1999
A novel iterative technique for calculating bit error probabilities for direct-sequence code-division multiple-access (DS-CDMA) systems with hard decision successive interference cancellation is proposed. The technique is simple to implement, and gives results close to those obtained by simulations.
Tony Ottosson, Pål Orten, Pål Frenger
openaire   +2 more sources

Engineering the Hierarchical Porosity of Granular Hydrogel Scaffolds Using Porous Microgels to Improve Cell Recruitment and Tissue Integration

open access: yesAdvanced Functional Materials, Volume 35, Issue 12, March 18, 2025.
By fabricating and covalently assembling gelatin methacryloyl (GelMA) porous microgels, a new class of granular hydrogel scaffolds with hierarchical porosity is developed. These scaffolds have a significantly higher void fraction than their counterparts made up of nonporous microgels, enhancing cell recruitment and tissue integration. This research may
Alexander Kedzierski   +9 more
wiley   +1 more source

Approximate minimum bit-error rate multiuser detection [PDF]

open access: green, 2002
Chen-Chu Yeh   +2 more
openalex   +1 more source

Analyzing Electronic Excitations and Exciton Binding Energies in Y6 Films

open access: yesAdvanced Functional Materials, EarlyView.
The Y6 molecule is used for increasing the efficiency of organic solar cells. The exciton binding energy is calculated for ensembles of Y6 molecules that are representative of the typically used films. The calculations show that the excitons typically spread out over many molecules.
Sahar Javaid Akram   +2 more
wiley   +1 more source

Signed Optical Quadrature Spatial Modulation in Free Space Optical Communication

open access: yesGuangtongxin yanjiu
【Objective】Aiming at the problems of low spectral efficiency and limited system throughput in Optical Quadrature Spatial Modulation (OQSM), a Signed Optical Quadrature Spatial Modulation (SOQSM) scheme is proposed in Free Space Optical Communication ...
ZHAO Hui   +4 more
doaj  

Research progress of error correction coding in optical wireless communication system

open access: yes物联网学报, 2022
The channel environment of the optical wireless communication is complicated, susceptible to various natural phenomena such as rain, snow, and fog.The channel code is usually used to correct the error caused by the channel noise.Common channel codes are ...
Jingyuan LIANG   +3 more
doaj  

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